+This document details the changes between this version, bash-4.2-rc1,
+and the previous version, bash-4.2-beta.
+
+1. Changes to Bash
+
+a. Fixed a bug that caused some redirection errors to leak file descriptors.
+
+b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a
+ higher precedence than unary `!' and `~'.
+
+c. Fixed a bug that caused simple commands in a pipeline to affect the exit
+ status ($?) seen by subsequent pipeline commands.
+
+2. Changes to Readline
+
+3. New Features in Bash
+
+4. New Features in Readline
+
+------------------------------------------------------------------------------
This document details the changes between this version, bash-4.2-beta,
and the previous version, bash-4.2-alpha.
+This document details the changes between this version, bash-4.2-rc1,
+and the previous version, bash-4.2-beta.
+
+1. Changes to Bash
+
+a. Fixed a bug that caused some redirection errors to leak file descriptors.
+
+b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a
+ higher precedence than unary `!' and `~'.
+
+c. Fixed a bug that caused simple commands in a pipeline to affect the exit
+ status ($?) seen by subsequent pipeline commands.
+
+2. Changes to Readline
+
+3. New Features in Bash
+
+4. New Features in Readline
+
+------------------------------------------------------------------------------
This document details the changes between this version, bash-4.2-beta,
and the previous version, bash-4.2-alpha.
37. Bash-4.0 now allows SIGCHLD to interrupt the wait builtin, as Posix
specifies, so the SIGCHLD trap is no longer always invoked once per
- exiting child if you are using `wait' to wait for all children.
+ exiting child if you are using `wait' to wait for all children. As
+ of bash-4.2, this is the status quo only when in posix mode.
38. Since bash-4.0 now follows Posix rules for finding the closing delimiter
of a $() command substitution, it will not behave as previous versions
44. Bash-4.1 uses the current locale when comparing strings using the < and
> operators to the `[[' command. This can be reverted to the previous
- behavior by setting one of the `compatNN' shopt options.
+ behavior (ASCII collating and strcmp(3)) by setting one of the
+ `compatNN' shopt options, where NN is less than 41.
45. Command substitutions now remove the caller's trap strings when trap is
run to set a new trap in the subshell. Previous to bash-4.2, the old
=========================
Bash-4.0 introduced the concept of a `shell compatibility level', specified
-as a set of options to the shopt builtin (compat31, compat32, compat40 at
-this writing). There is only one current compatibility level -- each
-option is mutually exclusive. This list does not mention behavior that is
-standard for a particular version (e.g., setting compat32 means that quoting
-the rhs of the regexp matching operator quotes special regexp characters in
-the word, which is default behavior in bash-3.2 and above).
+as a set of options to the shopt builtin (compat31, compat32, compat40, and
+compat41 at this writing). There is only one current compatibility level --
+each option is mutually exclusive. This list does not mention behavior
+that is standard for a particular version (e.g., setting compat32 means that
+quoting the rhs of the regexp matching operator quotes special regexp
+characters in the word, which is default behavior in bash-3.2 and above).
compat31 set
- the < and > operators to the [[ command do not consider the current
- locale when comparing strings
+ locale when comparing strings; they use ASCII ordering
- quoting the rhs of the regexp matching operator (=~) has no
special effect
compat32 set
- the < and > operators to the [[ command do not consider the current
- locale when comparing strings
+ locale when comparing strings; they use ASCII ordering
compat40 set
- the < and > operators to the [[ command do not consider the current
- locale when comparing strings
+ locale when comparing strings; they use ASCII ordering
- interrupting a command list such as "a ; b ; c" causes the execution
of the entire list to be aborted (in versions before bash-4.0,
interrupting one command in a list caused the next to be executed)
configure.in
- changed release status to 4.2-beta
+ 12/14
+ -----
+[bash-4.2-beta frozen]
+
12/18
-----
redir.c
- change the description of while and until to use `list-1' and
`list-2', similar to the Posix description. Suggested by
Jeff Haemer <jeffrey.haemer@gmail.com>
+
+ 12/27
+ -----
+execute_cmd.c
+ - slight changes to execute_command_internal and how it captures the
+ exit status of (command) and shell control structures with pipes to
+ avoid multiple variable assignments to last_command_exit_value
+ - change to execute_simple_command so that parent branches of shells
+ forked to execute commands in pipelines don't change $? to 0
+ (if (pipe_out != NO_PIPE) result = last_command_exit_value). Fixes
+ bug reported by Damien Nadà <dnade.ext@orange-ftgroup.com>
+
+ 12/28
+ -----
+configure.in
+ - changed version to bash-4.2-rc1
+
+ 1/2/2011
+ --------
+lib/readline/complete.c
+ - fix rl_filename_completion_function to dequote and save users_dirname
+ before calling any function to transform the directory name passed
+ to opendir(). Fix from Andreas Schwab <schwab@linux-m68k.org>
+
+lib/readline/doc/
+ - make sure to note that rl_directory_completion_hook cannot modify
+ the directory name argument if it returns 0
+
+bashline.c
+ - make sure that bash_directory_completion_hook consistently returns
+ non-zero whenever it modifies its directory name argument
+
+lib/readline/terminal.c
+ - don't bother with the declarations (extern or not) for PC, BS, and
+ UP if NCURSES_VERSION is defined, since ncurses defines local
+ versions of those symbols in the library. Fixes bug most recently
+ reported by Kevin Scott <kscott@eznet.net> against Mac OS X
+
+include/filecntl.h
+ - make sure O_TEXT and O_BINARY are defined to avoid Windows-specific
+ (or cygwin-specific) code. This and the following changes from
+ Eric Blake <eblake@redhat.com> for current cygwin systems
+
+input.h
+ - add a B_TEXT flag to note when the underlying file descriptor is
+ opened in O_TEXT mode
+
+lib/sh/tmpfile.c
+ - make sure temporary files are opened in binary mode (O_BINARY) on
+ systems where it matters
+
+input.c
+ - make sure to set the B_TEXT flag if the file descriptor has O_TEXT
+ in its flags (returned by fcntl)
+ - change b_fill_buffer to compensate for lseek() and read() returning
+ different offsets on files opened in O_TEXT mode
+ - cygwin now is able to lseek on files and set the unbuffered and text
+ flags appropriately, so can use the general test for a seekable fd
+ - now that cygwin uses O_TEXT or O_BINARY appropriately, we no longer
+ have to manually translate \r\n to \n
+
+redir.c
+ - remove the Cygwin-1.1 code from here_document_to_fd; cygwin is now
+ up to version 1.7 and can unlink an open file descriptor
+ - make sure temporary files used for here documents are opened in
+ binary mode (O_BINARY) on systems where it matters
+
+execute_cmd.c,parse.y
+ - make sure error messages use all printable characters in filenames
+ and strings
+
+{builtins/evalfile,shell,subst}.c
+ - remove cygwin-specific calls to setmode to force file descriptors
+ into text mode, since we're using text or binary mode according to
+ the mode of the mount point
+
+execute_cmd.c
+ - when creating pipes and making them stdin and stdout, make sure to
+ tell stdio that the mode of the underlying file descriptor may have
+ changed from text to binary
+
+subst.c
+ - when creating pipes for command substitution, make sure to
+ tell stdio that the mode of the underlying file descriptor may have
+ changed from text to binary
+
+ 1/3
+ ---
+doc/{bash.1,bashref.texi}
+ - changes to the readonly documentation suggested by Jan Schampera
+ <jan.schampera@web.de>
configure.in
- changed release status to 4.2-beta
+ 12/14
+ -----
+[bash-4.2-beta frozen]
+
12/18
-----
redir.c
-----
lib/sh/fpurge.c
- updated version from gnulib, inlined gnulib stdio-impl.h
+
+ 12/24
+ -----
+doc/bash.1
+ - change the description of while and until to use `list-1' and
+ `list-2', similar to the Posix description. Suggested by
+ Jeff Haemer <jeffrey.haemer@gmail.com>
+
+ 12/27
+ -----
+execute_cmd.c
+ - slight changes to execute_command_internal and how it captures the
+ exit status of (command) and shell control structures with pipes to
+ avoid multiple variable assignments to last_command_exit_value
+ - change to execute_simple_command so that parent branches of shells
+ forked to execute commands in pipelines don't change $? to 0
+ (if (pipe_out != NO_PIPE) result = last_command_exit_value). Fixes
+ bug reported by Damien Nadà <dnade.ext@orange-ftgroup.com>
+
+ 12/28
+ -----
+configure.in
+ - changed version to bash-4.2-rc1
+
+ 1/2/2011
+ --------
+lib/readline/complete.c
+ - fix rl_filename_completion_function to dequote and save users_dirname
+ before calling any function to transform the directory name passed
+ to opendir(). Fix from Andreas Schwab <schwab@linux-m68k.org>
+
+lib/readline/doc/
+ - make sure to note that rl_directory_completion_hook cannot modify
+ the directory name argument if it returns 0
+
+bashline.c
+ - make sure that bash_directory_completion_hook consistently returns
+ non-zero whenever it modifies its directory name argument
+
+lib/readline/terminal.c
+ - don't bother with the declarations (extern or not) for PC, BS, and
+ UP if NCURSES_VERSION is defined, since ncurses defines local
+ versions of those symbols in the library. Fixes bug most recently
+ reported by Kevin Scott <kscott@eznet.net> against Mac OS X
+
+include/filecntl.h
+ - make sure O_TEXT and O_BINARY are defined to avoid Windows-specific
+ (or cygwin-specific) code. This and the following changes from
+ Eric Blake <eblake@redhat.com> for current cygwin systems
+
+input.h
+ - add a B_TEXT flag to note when the underlying file descriptor is
+ opened in O_TEXT mode
+
+lib/sh/tmpfile.c
+ - make sure temporary files are opened in binary mode (O_BINARY) on
+ systems where it matters
+
+input.c
+ - make sure to set the B_TEXT flag if the file descriptor has O_TEXT
+ in its flags (returned by fcntl)
+ - change b_fill_buffer to compensate for lseek() and read() returning
+ different offsets on files opened in O_TEXT mode
+ - cygwin now is able to lseek on files and set the unbuffered and text
+ flags appropriately, so can use the general test for a seekable fd
+ - now that cygwin uses O_TEXT or O_BINARY appropriately, we no longer
+ have to manually translate \r\n to \n
+
+redir.c
+ - remove the Cygwin-1.1 code from here_document_to_fd; cygwin is now
+ up to version 1.7 and can unlink an open file descriptor
+ - make sure temporary files used for here documents are opened in
+ binary mode (O_BINARY) on systems where it matters
+
+execute_cmd.c,parse.y
+ - make sure error messages use all printable characters in filenames
+ and strings
+
+{builtins/evalfile,shell,subst}.c
+ - remove cygwin-specific calls to setmode to force file descriptors
+ into text mode, since we're using text or binary mode according to
+ the mode of the mount point
+
+execute_cmd.c
+ - when creating pipes and making them stdin and stdout, make sure to
+ tell stdio that the mode of the underlying file descriptor may have
+ changed from text to binary
+
+subst.c
+ - when creating pipes for command substitution, make sure to
+ tell stdio that the mode of the underlying file descriptor may have
+ changed from text to binary
The Restricted Shell::, for a description of restricted mode.
`--enable-select'
- Include the `select' builtin, which allows the generation of simple
- menus (*note Conditional Constructs::).
+ Include the `select' compound command, which allows the generation
+ of simple menus (*note Conditional Constructs::).
`--enable-separate-helpfiles'
Use external files for the documentation displayed by the `help'
tests/exec6.sub f
tests/exec7.sub f
tests/exec8.sub f
+tests/exec9.sub f
tests/exp.tests f
tests/exp.right f
tests/exp1.sub f
@%:@! /bin/sh
-@%:@ From configure.in for Bash 4.2, version 4.034.
+@%:@ From configure.in for Bash 4.2, version 4.035.
@%:@ Guess values for system-dependent variables and create Makefiles.
-@%:@ Generated by GNU Autoconf 2.63 for bash 4.2-beta.
+@%:@ Generated by GNU Autoconf 2.63 for bash 4.2-rc1.
@%:@
@%:@ Report bugs to <bug-bash@gnu.org>.
@%:@
# Identity of this package.
PACKAGE_NAME='bash'
PACKAGE_TARNAME='bash'
-PACKAGE_VERSION='4.2-beta'
-PACKAGE_STRING='bash 4.2-beta'
+PACKAGE_VERSION='4.2-rc1'
+PACKAGE_STRING='bash 4.2-rc1'
PACKAGE_BUGREPORT='bug-bash@gnu.org'
ac_unique_file="shell.h"
# Omit some internal or obsolete options to make the list less imposing.
# This message is too long to be a string in the A/UX 3.1 sh.
cat <<_ACEOF
-\`configure' configures bash 4.2-beta to adapt to many kinds of systems.
+\`configure' configures bash 4.2-rc1 to adapt to many kinds of systems.
Usage: $0 [OPTION]... [VAR=VALUE]...
if test -n "$ac_init_help"; then
case $ac_init_help in
- short | recursive ) echo "Configuration of bash 4.2-beta:";;
+ short | recursive ) echo "Configuration of bash 4.2-rc1:";;
esac
cat <<\_ACEOF
test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
cat <<\_ACEOF
-bash configure 4.2-beta
+bash configure 4.2-rc1
generated by GNU Autoconf 2.63
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
-It was created by bash $as_me 4.2-beta, which was
+It was created by bash $as_me 4.2-rc1, which was
generated by GNU Autoconf 2.63. Invocation command line was
$ $0 $@
BASHVERS=4.2
-RELSTATUS=beta
+RELSTATUS=rc1
case "$RELSTATUS" in
alp*|bet*|dev*|rc*|maint*) DEBUG='-DDEBUG' MALLOC_DEBUG='-DMALLOC_DEBUG' ;;
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
-This file was extended by bash $as_me 4.2-beta, which was
+This file was extended by bash $as_me 4.2-rc1, which was
generated by GNU Autoconf 2.63. Invocation command line was
CONFIG_FILES = $CONFIG_FILES
_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_version="\\
-bash config.status 4.2-beta
+bash config.status 4.2-rc1
configured by $0, generated by GNU Autoconf 2.63,
with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
'configure.in'
],
{
- '_LT_AC_TAGCONFIG' => 1,
'AM_PROG_F77_C_O' => 1,
- 'AC_INIT' => 1,
+ '_LT_AC_TAGCONFIG' => 1,
'm4_pattern_forbid' => 1,
- '_AM_COND_IF' => 1,
+ 'AC_INIT' => 1,
'AC_CANONICAL_TARGET' => 1,
- 'AC_SUBST' => 1,
+ '_AM_COND_IF' => 1,
'AC_CONFIG_LIBOBJ_DIR' => 1,
- 'AC_FC_SRCEXT' => 1,
+ 'AC_SUBST' => 1,
'AC_CANONICAL_HOST' => 1,
+ 'AC_FC_SRCEXT' => 1,
'AC_PROG_LIBTOOL' => 1,
'AM_INIT_AUTOMAKE' => 1,
'AC_CONFIG_SUBDIRS' => 1,
'AM_AUTOMAKE_VERSION' => 1,
'LT_CONFIG_LTDL_DIR' => 1,
- 'AC_REQUIRE_AUX_FILE' => 1,
'AC_CONFIG_LINKS' => 1,
- 'm4_sinclude' => 1,
+ 'AC_REQUIRE_AUX_FILE' => 1,
'LT_SUPPORTED_TAG' => 1,
+ 'm4_sinclude' => 1,
'AM_MAINTAINER_MODE' => 1,
'AM_GNU_GETTEXT_INTL_SUBDIR' => 1,
'_m4_warn' => 1,
'AC_CANONICAL_BUILD' => 1,
'AC_FC_FREEFORM' => 1,
'AH_OUTPUT' => 1,
- '_AM_SUBST_NOTMAKE' => 1,
'AC_CONFIG_AUX_DIR' => 1,
- 'sinclude' => 1,
- 'm4_pattern_allow' => 1,
+ '_AM_SUBST_NOTMAKE' => 1,
'AM_PROG_CC_C_O' => 1,
- 'AC_CANONICAL_SYSTEM' => 1,
+ 'm4_pattern_allow' => 1,
+ 'sinclude' => 1,
'AM_CONDITIONAL' => 1,
+ 'AC_CANONICAL_SYSTEM' => 1,
'AC_CONFIG_HEADERS' => 1,
'AC_DEFINE_TRACE_LITERAL' => 1,
'm4_include' => 1,
-m4trace:configure.in:29: -1- AC_INIT([bash], [4.2-beta], [bug-bash@gnu.org])
+m4trace:configure.in:29: -1- AC_INIT([bash], [4.2-rc1], [bug-bash@gnu.org])
m4trace:configure.in:29: -1- m4_pattern_forbid([^_?A[CHUM]_])
m4trace:configure.in:29: -1- m4_pattern_forbid([_AC_])
m4trace:configure.in:29: -1- m4_pattern_forbid([^LIBOBJS$], [do not use LIBOBJS directly, use AC_LIBOBJ (see section `AC_LIBOBJ vs LIBOBJS'])
}
/* Handle symbolic link references and other directory name
- expansions while hacking completion. */
+ expansions while hacking completion. This should return 1 if it modifies
+ the DIRNAME argument, 0 otherwise. It should make sure not to modify
+ DIRNAME if it returns 0. */
static int
bash_directory_completion_hook (dirname)
char **dirname;
{
/* Dequote the filename even if we don't expand it. */
new_dirname = bash_dequote_filename (local_dirname, rl_completion_quote_character);
+ return_value = STREQ (local_dirname, new_dirname) == 0;
free (local_dirname);
local_dirname = *dirname = new_dirname;
}
free (temp1);
temp1 = temp2;
temp2 = sh_canonpath (temp1, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
- return_value = temp2 != 0;
+ return_value |= temp2 != 0;
}
}
/* If we can't canonicalize, bail. */
if (temp2 == 0)
{
free (temp1);
- return 1;
+ return return_value;
}
len1 = strlen (temp1);
if (temp1[len1 - 1] == '/')
temp2[len2 + 1] = '\0';
}
}
+ return_value |= STREQ (local_dirname, temp2) == 0;
free (local_dirname);
*dirname = temp2;
free (temp1);
}
+
return (return_value);
}
/* Tell the completer that we want a crack first. */
rl_attempted_completion_function = attempt_shell_completion;
-#if 0
/* Tell the completer that we might want to follow symbolic links or
do other expansion on directory names. */
rl_directory_completion_hook = bash_directory_completion_hook;
-#endif
rl_filename_rewrite_hook = bash_filename_rewrite_hook;
This file is declare.def, from which is created declare.c.
It implements the builtins "declare" and "local" in Bash.
-Copyright (C) 1987-2009 Free Software Foundation, Inc.
+Copyright (C) 1987-2010 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
return ((flags & FEVAL_BUILTIN) ? EXECUTION_FAILURE : -1);
}
-#if defined (__CYGWIN__) && defined (O_TEXT)
- setmode (fd, O_TEXT);
-#endif
-
if (S_ISREG (finfo.st_mode) && file_size <= SSIZE_MAX)
{
string = (char *)xmalloc (1 + file_size);
extern int indirection_level, subshell_environment;
extern int return_catch_flag, return_catch_value;
extern int last_command_exit_value;
+extern int executing_command_builtin;
/* How many `levels' of sourced files we have. */
int sourcelevel = 0;
if (sflags)
flags |= FEVAL_NOPUSHARGS;
/* POSIX shells exit if non-interactive and file error. */
- if (posixly_correct && interactive_shell == 0)
+ if (posixly_correct && interactive_shell == 0 && executing_command_builtin == 0)
flags |= FEVAL_LONGJMP;
rval = _evalfile (filename, flags);
$BUILTIN readonly
$FUNCTION readonly_builtin
-$SHORT_DOC readonly [-af] [name[=value] ...] or readonly -p
+$SHORT_DOC readonly [-aAf] [name[=value] ...] or readonly -p
Mark shell variables as unchangeable.
Mark each NAME as read-only; the values of these NAMEs may not be
This file is setattr.def, from which is created setattr.c.
It implements the builtins "export" and "readonly", in Bash.
-Copyright (C) 1987-2009 Free Software Foundation, Inc.
+Copyright (C) 1987-2010 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
#! /bin/sh
-# From configure.in for Bash 4.2, version 4.034.
+# From configure.in for Bash 4.2, version 4.035.
# Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.63 for bash 4.2-beta.
+# Generated by GNU Autoconf 2.63 for bash 4.2-rc1.
#
# Report bugs to <bug-bash@gnu.org>.
#
# Identity of this package.
PACKAGE_NAME='bash'
PACKAGE_TARNAME='bash'
-PACKAGE_VERSION='4.2-beta'
-PACKAGE_STRING='bash 4.2-beta'
+PACKAGE_VERSION='4.2-rc1'
+PACKAGE_STRING='bash 4.2-rc1'
PACKAGE_BUGREPORT='bug-bash@gnu.org'
ac_unique_file="shell.h"
# Omit some internal or obsolete options to make the list less imposing.
# This message is too long to be a string in the A/UX 3.1 sh.
cat <<_ACEOF
-\`configure' configures bash 4.2-beta to adapt to many kinds of systems.
+\`configure' configures bash 4.2-rc1 to adapt to many kinds of systems.
Usage: $0 [OPTION]... [VAR=VALUE]...
if test -n "$ac_init_help"; then
case $ac_init_help in
- short | recursive ) echo "Configuration of bash 4.2-beta:";;
+ short | recursive ) echo "Configuration of bash 4.2-rc1:";;
esac
cat <<\_ACEOF
test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
cat <<\_ACEOF
-bash configure 4.2-beta
+bash configure 4.2-rc1
generated by GNU Autoconf 2.63
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
-It was created by bash $as_me 4.2-beta, which was
+It was created by bash $as_me 4.2-rc1, which was
generated by GNU Autoconf 2.63. Invocation command line was
$ $0 $@
BASHVERS=4.2
-RELSTATUS=beta
+RELSTATUS=rc1
case "$RELSTATUS" in
alp*|bet*|dev*|rc*|maint*) DEBUG='-DDEBUG' MALLOC_DEBUG='-DMALLOC_DEBUG' ;;
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
-This file was extended by bash $as_me 4.2-beta, which was
+This file was extended by bash $as_me 4.2-rc1, which was
generated by GNU Autoconf 2.63. Invocation command line was
CONFIG_FILES = $CONFIG_FILES
_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_version="\\
-bash config.status 4.2-beta
+bash config.status 4.2-rc1
configured by $0, generated by GNU Autoconf 2.63,
with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
-AC_REVISION([for Bash 4.2, version 4.034])dnl
+AC_REVISION([for Bash 4.2, version 4.035])dnl
define(bashvers, 4.2)
-define(relstatus, beta)
+define(relstatus, rc1)
AC_INIT([bash], bashvers-relstatus, [bug-bash@gnu.org])
-This is the Bash FAQ, version 4.12, for Bash version 4.1.
+This is the Bash FAQ, version 4.12, for Bash version 4.2.
This document contains a set of frequently-asked questions concerning
Bash, the GNU Bourne-Again Shell. Bash is a freely-available command
Section B: The latest version
-B1) What's new in version 4.1?
-B2) Are there any user-visible incompatibilities between bash-4.1 and
+B1) What's new in version 4.2?
+B2) Are there any user-visible incompatibilities between bash-4.2 and
previous bash versions?
Section C: Differences from other Unix shells
A2) What's the latest version?
-The latest version is 4.1, first made available on 31 December, 2009.
+The latest version is 4.2, first made available on NN December, 2010.
A3) Where can I get it?
Bash is the GNU project's shell, and so is available from the
master GNU archive site, ftp.gnu.org, and its mirrors. The
latest version is also available for FTP from ftp.cwru.edu.
-The following URLs tell how to get version 4.1:
+The following URLs tell how to get version 4.2:
-ftp://ftp.gnu.org/pub/gnu/bash/bash-4.1.tar.gz
-ftp://ftp.cwru.edu/pub/bash/bash-4.1.tar.gz
+ftp://ftp.gnu.org/pub/gnu/bash/bash-4.2.tar.gz
+ftp://ftp.cwru.edu/pub/bash/bash-4.2.tar.gz
Formatted versions of the documentation are available with the URLs:
-ftp://ftp.gnu.org/pub/gnu/bash/bash-doc-4.1.tar.gz
-ftp://ftp.cwru.edu/pub/bash/bash-doc-4.1.tar.gz
+ftp://ftp.gnu.org/pub/gnu/bash/bash-doc-4.2.tar.gz
+ftp://ftp.cwru.edu/pub/bash/bash-doc-4.2.tar.gz
Any patches for the current version are available with the URL:
-ftp://ftp.cwru.edu/pub/bash/bash-4.1-patches/
+ftp://ftp.cwru.edu/pub/bash/bash-4.2-patches/
A4) On what machines will bash run?
Bash-3.0 compiles and runs with no modifications under Microsoft's Services
for Unix (SFU), once known as Interix. I do not anticipate any problems
-with building bash-4.1, but will gladly accept any patches that are needed.
+with building bash-4.2, but will gladly accept any patches that are needed.
A6) How can I build bash with gcc?
Section B: The latest version
-B1) What's new in version 4.1?
+B1) What's new in version 4.2?
-Bash-4.1 is the first revision to the fourth major release of bash.
+Bash-4.2 is the second revision to the fourth major release of bash.
-Bash-4.1 contains the following new features (see the manual page for
-complete descriptions and the CHANGES and NEWS files in the bash-4.1
+Bash-4.2 contains the following new features (see the manual page for
+complete descriptions and the CHANGES and NEWS files in the bash-4.2
distribution):
+o `exec -a foo' now sets $0 to `foo' in an executable shell script without a
+ leading #!.
+
+o Subshells begun to execute command substitutions or run shell functions or
+ builtins in subshells do not reset trap strings until a new trap is
+ specified. This allows $(trap) to display the caller's traps and the
+ trap strings to persist until a new trap is set.
+
+o `trap -p' will now show signals ignored at shell startup, though their
+ disposition still cannot be modified.
+
+o $'...', echo, and printf understand \uXXXX and \UXXXXXXXX escape sequences.
+
+o declare/typeset has a new `-g' option, which creates variables in the
+ global scope even when run in a shell function.
+
+o test/[/[[ have a new -v variable unary operator, which returns success if
+ `variable' has been set.
+
+o Posix parsing changes to allow `! time command' and multiple consecutive
+ instances of `!' (which toggle) and `time' (which have no cumulative
+ effect).
+
+o Posix change to allow `time' as a command by itself to print the elapsed
+ user, system, and real times for the shell and its children.
+
+o $((...)) is always parsed as an arithmetic expansion first, instead of as
+ a potential nested command substitution, as Posix requires.
+
+o A new FUNCNEST variable to allow the user to control the maximum shell
+ function nesting (recursive execution) level.
+
+o The mapfile builtin now supplies a third argument to the callback command:
+ the line about to be assigned to the supplied array index.
+
+o The printf builtin has as new %(fmt)T specifier, which allows time values
+ to use strftime-like formatting.
+
+o There is a new `compat41' shell option.
+
+o The cd builtin has a new Posix-mandated `-e' option.
+
+o Negative subscripts to indexed arrays, previously errors, now are treated
+ as offsets from the maximum assigned index + 1.
+
+o Negative length specifications in the ${var:offset:length} expansion,
+ previously errors, are now treated as offsets from the end of the variable.
+
+o Parsing change to allow `time -p --'.
+
+o Posix-mode parsing change to not recognize `time' as a keyword if the
+ following token begins with a `-'. This means no more Posix-mode
+ `time -p'. Posix interpretation 267.
+
+o There is a new `lastpipe' shell option that runs the last command of a
+ pipeline in the current shell context. The lastpipe option has no
+ effect if job control is enabled.
+
+o History expansion no longer expands the `$!' variable expansion.
+
+o Posix mode shells no longer exit if a variable assignment error occurs
+ with an assignment preceding a command that is not a special builtin.
+
+o Non-interactive mode shells exit if -u is enabled an an attempt is made
+ to use an unset variable with the % or # expansions, the `//', `^', or
+ `,' expansions, or the parameter length expansion.
+
+o Posix-mode shells use the argument passed to `.' as-is if a $PATH search
+ fails, effectively searching the current directory. Posix-2008 change.
+
+A short feature history dating back to Bash-2.0:
+
+Bash-4.1 contained the following new features:
+
o Here-documents within $(...) command substitutions may once more be
delimited by the closing right paren, instead of requiring a newline.
readline sends the smm/rmm sequences if the terminal indicates it has a
meta key that enables eight-bit characters.
-A short feature history dating from Bash-2.0:
-
Bash-4.0 contained the following new features:
o When using substring expansion on the positional parameters, a starting
lots of code now smaller and faster
test suite greatly expanded
-B2) Are there any user-visible incompatibilities between bash-4.1 and
+B2) Are there any user-visible incompatibilities between bash-4.2 and
previous bash versions?
-There are a few incompatibilities between version 4.1 and previous
+There are a few incompatibilities between version 4.2 and previous
versions. They are detailed in the file COMPAT in the bash distribution.
That file is not meant to be all-encompassing; send mail to
bash-maintainers@gnu.org (or bug-bash@gnu.org if you would like
This list is current through ksh93t+ (05/05/2009)
-New things in ksh-93 not in bash-4.1:
+New things in ksh-93 not in bash-4.2:
floating point arithmetic and variables
math library functions
${!name[sub]} name of subscript for associative array
`fc' has been renamed to `hist'
`.' can execute shell functions
getopts -a
- printf %B, %H, %P, %R, %T, %Z modifiers, output base for %d, `=' flag
+ printf %B, %H, %P, %R, %Z modifiers, output base for %d, `=' flag
read -n/-N differ/-v
set -o showme/-o multiline (bash default)
`sleep' and `getconf' builtins (bash has loadable versions)
[[ -R name ]] (checks whether or not name is a nameref)
typeset -C/-S/-T/-X/-h/-s
experimental `type' definitions (a la typedef) using typeset
- negative subscripts for indexed array variables
array expansions ${array[sub1..sub2]} and ${!array[sub1..sub2]}
associative array assignments using `;' as element separator
command substitution $(n<#) expands to current byte offset for fd N
new '${ ' form of command substitution, executed in current shell
new >;/<>;/<#pat/<##pat/<#/># redirections
brace expansion printf-like formats
- [[ -v var ]] operators (checks whether or not var is set)
-New things in ksh-93 present in bash-4.1:
+New things in ksh-93 present in bash-4.2:
associative arrays
[n]<&word- and [n]>&word- redirections (combination dup and close)
for (( expr1; expr2; expr3 )) ; do list; done - arithmetic for command
expansions: ${!param}, ${param:offset[:len]}, ${param/pat[/str]},
${!param*}
compound array assignment
+ negative subscripts for indexed array variables
the `!' reserved word
loadable builtins -- but ksh uses `builtin' while bash uses `enable'
new $'...' and $"..." quoting
`command', `builtin', `disown' builtins
echo -e
exec -c/-a
+ printf %T modifier
read -A (bash uses read -a)
read -t/-d
trap -p
negative offsets in ${param:offset:length}
redirection operators preceded with {varname} to store fd number in varname
DEBUG can force skipping following command
+ [[ -v var ]] operator (checks whether or not var is set)
Section D: Why does bash do some things differently than other Unix shells?
-This is the Bash FAQ, version 4.10, for Bash version 4.1.
+This is the Bash FAQ, version 4.12, for Bash version 4.1.
This document contains a set of frequently-asked questions concerning
Bash, the GNU Bourne-Again Shell. Bash is a freely-available command
- the < and > operators to the [[ command do not consider the current
locale when comparing strings
- interrupting a command list such as "a ; b ; c" causes the execution
- of the entire list to be aborted
+ of the entire list to be aborted (in versions before bash-4.0,
+ interrupting one command in a list caused the next to be executed)
Section F: Things to watch out for on certain Unix versions
tional operators such as -\b-f\bf must be unquoted to be recognized as
primaries.
- When used with [\b[[\b[, The <\b< and >\b> operators sort lexicographically
+ When used with [\b[[\b[, the <\b< and >\b> operators sort lexicographically
using the current locale.
When the =\b==\b= and !\b!=\b= operators are used, the string to the right
tus of the last command executed, or zero if no condition tested
true.
- w\bwh\bhi\bil\ble\be _\bl_\bi_\bs_\bt; d\bdo\bo _\bl_\bi_\bs_\bt; d\bdo\bon\bne\be
- u\bun\bnt\bti\bil\bl _\bl_\bi_\bs_\bt; d\bdo\bo _\bl_\bi_\bs_\bt; d\bdo\bon\bne\be
- The w\bwh\bhi\bil\ble\be command continuously executes the d\bdo\bo _\bl_\bi_\bs_\bt as long as
- the last command in _\bl_\bi_\bs_\bt returns an exit status of zero. The
- u\bun\bnt\bti\bil\bl command is identical to the w\bwh\bhi\bil\ble\be command, except that the
- test is negated; the d\bdo\bo _\bl_\bi_\bs_\bt is executed as long as the last
- command in _\bl_\bi_\bs_\bt returns a non-zero exit status. The exit status
- of the w\bwh\bhi\bil\ble\be and u\bun\bnt\bti\bil\bl commands is the exit status of the last
- d\bdo\bo _\bl_\bi_\bs_\bt command executed, or zero if none was executed.
+ w\bwh\bhi\bil\ble\be _\bl_\bi_\bs_\bt_\b-_\b1; d\bdo\bo _\bl_\bi_\bs_\bt_\b-_\b2; d\bdo\bon\bne\be
+ u\bun\bnt\bti\bil\bl _\bl_\bi_\bs_\bt_\b-_\b1; d\bdo\bo _\bl_\bi_\bs_\bt_\b-_\b2; d\bdo\bon\bne\be
+ The w\bwh\bhi\bil\ble\be command continuously executes the list _\bl_\bi_\bs_\bt_\b-_\b2 as long
+ as the last command in the list _\bl_\bi_\bs_\bt_\b-_\b1 returns an exit status of
+ zero. The u\bun\bnt\bti\bil\bl command is identical to the w\bwh\bhi\bil\ble\be command,
+ except that the test is negated; _\bl_\bi_\bs_\bt_\b-_\b2 is executed as long as
+ the last command in _\bl_\bi_\bs_\bt_\b-_\b1 returns a non-zero exit status. The
+ exit status of the w\bwh\bhi\bil\ble\be and u\bun\bnt\bti\bil\bl commands is the exit status
+ of the last command executed in _\bl_\bi_\bs_\bt_\b-_\b2, or zero if none was exe-
+ cuted.
C\bCo\bop\bpr\bro\boc\bce\bes\bss\bse\bes\bs
A _\bc_\bo_\bp_\br_\bo_\bc_\be_\bs_\bs is a shell command preceded by the c\bco\bop\bpr\bro\boc\bc reserved word. A
- coprocess is executed asynchronously in a subshell, as if the command
- had been terminated with the &\b& control operator, with a two-way pipe
+ coprocess is executed asynchronously in a subshell, as if the command
+ had been terminated with the &\b& control operator, with a two-way pipe
established between the executing shell and the coprocess.
The format for a coprocess is:
c\bco\bop\bpr\bro\boc\bc [_\bN_\bA_\bM_\bE] _\bc_\bo_\bm_\bm_\ba_\bn_\bd [_\br_\be_\bd_\bi_\br_\be_\bc_\bt_\bi_\bo_\bn_\bs]
- This creates a coprocess named _\bN_\bA_\bM_\bE. If _\bN_\bA_\bM_\bE is not supplied, the
+ This creates a coprocess named _\bN_\bA_\bM_\bE. If _\bN_\bA_\bM_\bE is not supplied, the
default name is _\bC_\bO_\bP_\bR_\bO_\bC. _\bN_\bA_\bM_\bE must not be supplied if _\bc_\bo_\bm_\bm_\ba_\bn_\bd is a _\bs_\bi_\bm_\b-
_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd (see above); otherwise, it is interpreted as the first word
- of the simple command. When the coproc is executed, the shell creates
- an array variable (see A\bAr\brr\bra\bay\bys\bs below) named _\bN_\bA_\bM_\bE in the context of the
- executing shell. The standard output of _\bc_\bo_\bm_\bm_\ba_\bn_\bd is connected via a
- pipe to a file descriptor in the executing shell, and that file
- descriptor is assigned to _\bN_\bA_\bM_\bE[0]. The standard input of _\bc_\bo_\bm_\bm_\ba_\bn_\bd is
- connected via a pipe to a file descriptor in the executing shell, and
- that file descriptor is assigned to _\bN_\bA_\bM_\bE[1]. This pipe is established
- before any redirections specified by the command (see R\bRE\bED\bDI\bIR\bRE\bEC\bCT\bTI\bIO\bON\bN
- below). The file descriptors can be utilized as arguments to shell
- commands and redirections using standard word expansions. The process
- ID of the shell spawned to execute the coprocess is available as the
- value of the variable _\bN_\bA_\bM_\bE_PID. The w\bwa\bai\bit\bt builtin command may be used
+ of the simple command. When the coproc is executed, the shell creates
+ an array variable (see A\bAr\brr\bra\bay\bys\bs below) named _\bN_\bA_\bM_\bE in the context of the
+ executing shell. The standard output of _\bc_\bo_\bm_\bm_\ba_\bn_\bd is connected via a
+ pipe to a file descriptor in the executing shell, and that file
+ descriptor is assigned to _\bN_\bA_\bM_\bE[0]. The standard input of _\bc_\bo_\bm_\bm_\ba_\bn_\bd is
+ connected via a pipe to a file descriptor in the executing shell, and
+ that file descriptor is assigned to _\bN_\bA_\bM_\bE[1]. This pipe is established
+ before any redirections specified by the command (see R\bRE\bED\bDI\bIR\bRE\bEC\bCT\bTI\bIO\bON\bN
+ below). The file descriptors can be utilized as arguments to shell
+ commands and redirections using standard word expansions. The process
+ ID of the shell spawned to execute the coprocess is available as the
+ value of the variable _\bN_\bA_\bM_\bE_PID. The w\bwa\bai\bit\bt builtin command may be used
to wait for the coprocess to terminate.
The return status of a coprocess is the exit status of _\bc_\bo_\bm_\bm_\ba_\bn_\bd.
S\bSh\bhe\bel\bll\bl F\bFu\bun\bnc\bct\bti\bio\bon\bn D\bDe\bef\bfi\bin\bni\bit\bti\bio\bon\bns\bs
- A shell function is an object that is called like a simple command and
- executes a compound command with a new set of positional parameters.
+ A shell function is an object that is called like a simple command and
+ executes a compound command with a new set of positional parameters.
Shell functions are declared as follows:
_\bn_\ba_\bm_\be () _\bc_\bo_\bm_\bp_\bo_\bu_\bn_\bd_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd [_\br_\be_\bd_\bi_\br_\be_\bc_\bt_\bi_\bo_\bn]
f\bfu\bun\bnc\bct\bti\bio\bon\bn _\bn_\ba_\bm_\be [()] _\bc_\bo_\bm_\bp_\bo_\bu_\bn_\bd_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd [_\br_\be_\bd_\bi_\br_\be_\bc_\bt_\bi_\bo_\bn]
- This defines a function named _\bn_\ba_\bm_\be. The reserved word f\bfu\bun\bnc\bct\bti\bio\bon\bn
- is optional. If the f\bfu\bun\bnc\bct\bti\bio\bon\bn reserved word is supplied, the
- parentheses are optional. The _\bb_\bo_\bd_\by of the function is the com-
- pound command _\bc_\bo_\bm_\bp_\bo_\bu_\bn_\bd_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd (see C\bCo\bom\bmp\bpo\bou\bun\bnd\bd C\bCo\bom\bmm\bma\ban\bnd\bds\bs above).
- That command is usually a _\bl_\bi_\bs_\bt of commands between { and }, but
- may be any command listed under C\bCo\bom\bmp\bpo\bou\bun\bnd\bd C\bCo\bom\bmm\bma\ban\bnd\bds\bs above. _\bc_\bo_\bm_\b-
+ This defines a function named _\bn_\ba_\bm_\be. The reserved word f\bfu\bun\bnc\bct\bti\bio\bon\bn
+ is optional. If the f\bfu\bun\bnc\bct\bti\bio\bon\bn reserved word is supplied, the
+ parentheses are optional. The _\bb_\bo_\bd_\by of the function is the com-
+ pound command _\bc_\bo_\bm_\bp_\bo_\bu_\bn_\bd_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd (see C\bCo\bom\bmp\bpo\bou\bun\bnd\bd C\bCo\bom\bmm\bma\ban\bnd\bds\bs above).
+ That command is usually a _\bl_\bi_\bs_\bt of commands between { and }, but
+ may be any command listed under C\bCo\bom\bmp\bpo\bou\bun\bnd\bd C\bCo\bom\bmm\bma\ban\bnd\bds\bs above. _\bc_\bo_\bm_\b-
_\bp_\bo_\bu_\bn_\bd_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd is executed whenever _\bn_\ba_\bm_\be is specified as the name
- of a simple command. Any redirections (see R\bRE\bED\bDI\bIR\bRE\bEC\bCT\bTI\bIO\bON\bN below)
- specified when a function is defined are performed when the
- function is executed. The exit status of a function definition
+ of a simple command. Any redirections (see R\bRE\bED\bDI\bIR\bRE\bEC\bCT\bTI\bIO\bON\bN below)
+ specified when a function is defined are performed when the
+ function is executed. The exit status of a function definition
is zero unless a syntax error occurs or a readonly function with
the same name already exists. When executed, the exit status of
- a function is the exit status of the last command executed in
+ a function is the exit status of the last command executed in
the body. (See F\bFU\bUN\bNC\bCT\bTI\bIO\bON\bNS\bS below.)
C\bCO\bOM\bMM\bME\bEN\bNT\bTS\bS
In a non-interactive shell, or an interactive shell in which the i\bin\bnt\bte\ber\br-\b-
- a\bac\bct\bti\biv\bve\be_\b_c\bco\bom\bmm\bme\ben\bnt\bts\bs option to the s\bsh\bho\bop\bpt\bt builtin is enabled (see S\bSH\bHE\bEL\bLL\bL
- B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below), a word beginning with #\b# causes that word and
- all remaining characters on that line to be ignored. An interactive
- shell without the i\bin\bnt\bte\ber\bra\bac\bct\bti\biv\bve\be_\b_c\bco\bom\bmm\bme\ben\bnt\bts\bs option enabled does not allow
+ a\bac\bct\bti\biv\bve\be_\b_c\bco\bom\bmm\bme\ben\bnt\bts\bs option to the s\bsh\bho\bop\bpt\bt builtin is enabled (see S\bSH\bHE\bEL\bLL\bL
+ B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below), a word beginning with #\b# causes that word and
+ all remaining characters on that line to be ignored. An interactive
+ shell without the i\bin\bnt\bte\ber\bra\bac\bct\bti\biv\bve\be_\b_c\bco\bom\bmm\bme\ben\bnt\bts\bs option enabled does not allow
comments. The i\bin\bnt\bte\ber\bra\bac\bct\bti\biv\bve\be_\b_c\bco\bom\bmm\bme\ben\bnt\bts\bs option is on by default in interac-
tive shells.
Q\bQU\bUO\bOT\bTI\bIN\bNG\bG
- _\bQ_\bu_\bo_\bt_\bi_\bn_\bg is used to remove the special meaning of certain characters or
- words to the shell. Quoting can be used to disable special treatment
+ _\bQ_\bu_\bo_\bt_\bi_\bn_\bg is used to remove the special meaning of certain characters or
+ words to the shell. Quoting can be used to disable special treatment
for special characters, to prevent reserved words from being recognized
as such, and to prevent parameter expansion.
- Each of the _\bm_\be_\bt_\ba_\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br_\bs listed above under D\bDE\bEF\bFI\bIN\bNI\bIT\bTI\bIO\bON\bNS\bS has special
+ Each of the _\bm_\be_\bt_\ba_\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br_\bs listed above under D\bDE\bEF\bFI\bIN\bNI\bIT\bTI\bIO\bON\bNS\bS has special
meaning to the shell and must be quoted if it is to represent itself.
- When the command history expansion facilities are being used (see H\bHI\bIS\bS-\b-
+ When the command history expansion facilities are being used (see H\bHI\bIS\bS-\b-
T\bTO\bOR\bRY\bY E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN below), the _\bh_\bi_\bs_\bt_\bo_\br_\by _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn character, usually !\b!, must
be quoted to prevent history expansion.
- There are three quoting mechanisms: the _\be_\bs_\bc_\ba_\bp_\be _\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br, single
+ There are three quoting mechanisms: the _\be_\bs_\bc_\ba_\bp_\be _\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br, single
quotes, and double quotes.
- A non-quoted backslash (\\b\) is the _\be_\bs_\bc_\ba_\bp_\be _\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br. It preserves the
+ A non-quoted backslash (\\b\) is the _\be_\bs_\bc_\ba_\bp_\be _\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br. It preserves the
literal value of the next character that follows, with the exception of
- <newline>. If a \\b\<newline> pair appears, and the backslash is not
- itself quoted, the \\b\<newline> is treated as a line continuation (that
+ <newline>. If a \\b\<newline> pair appears, and the backslash is not
+ itself quoted, the \\b\<newline> is treated as a line continuation (that
is, it is removed from the input stream and effectively ignored).
- Enclosing characters in single quotes preserves the literal value of
+ Enclosing characters in single quotes preserves the literal value of
each character within the quotes. A single quote may not occur between
single quotes, even when preceded by a backslash.
- Enclosing characters in double quotes preserves the literal value of
- all characters within the quotes, with the exception of $\b$, `\b`, \\b\, and,
- when history expansion is enabled, !\b!. The characters $\b$ and `\b` retain
- their special meaning within double quotes. The backslash retains its
- special meaning only when followed by one of the following characters:
- $\b$, `\b`, "\b", \\b\, or <\b<n\bne\bew\bwl\bli\bin\bne\be>\b>. A double quote may be quoted within double
+ Enclosing characters in double quotes preserves the literal value of
+ all characters within the quotes, with the exception of $\b$, `\b`, \\b\, and,
+ when history expansion is enabled, !\b!. The characters $\b$ and `\b` retain
+ their special meaning within double quotes. The backslash retains its
+ special meaning only when followed by one of the following characters:
+ $\b$, `\b`, "\b", \\b\, or <\b<n\bne\bew\bwl\bli\bin\bne\be>\b>. A double quote may be quoted within double
quotes by preceding it with a backslash. If enabled, history expansion
- will be performed unless an !\b! appearing in double quotes is escaped
+ will be performed unless an !\b! appearing in double quotes is escaped
using a backslash. The backslash preceding the !\b! is not removed.
- The special parameters *\b* and @\b@ have special meaning when in double
+ The special parameters *\b* and @\b@ have special meaning when in double
quotes (see P\bPA\bAR\bRA\bAM\bME\bET\bTE\bER\bRS\bS below).
Words of the form $\b$'_\bs_\bt_\br_\bi_\bn_\bg' are treated specially. The word expands to
- _\bs_\bt_\br_\bi_\bn_\bg, with backslash-escaped characters replaced as specified by the
- ANSI C standard. Backslash escape sequences, if present, are decoded
+ _\bs_\bt_\br_\bi_\bn_\bg, with backslash-escaped characters replaced as specified by the
+ ANSI C standard. Backslash escape sequences, if present, are decoded
as follows:
\\b\a\ba alert (bell)
\\b\b\bb backspace
\\b\\\b\ backslash
\\b\'\b' single quote
\\b\"\b" double quote
- \\b\_\bn_\bn_\bn the eight-bit character whose value is the octal value
+ \\b\_\bn_\bn_\bn the eight-bit character whose value is the octal value
_\bn_\bn_\bn (one to three digits)
- \\b\x\bx_\bH_\bH the eight-bit character whose value is the hexadecimal
+ \\b\x\bx_\bH_\bH the eight-bit character whose value is the hexadecimal
value _\bH_\bH (one or two hex digits)
- \\b\u\bu_\bH_\bH_\bH_\bH the Unicode (ISO/IEC 10646) character whose value is the
+ \\b\u\bu_\bH_\bH_\bH_\bH the Unicode (ISO/IEC 10646) character whose value is the
hexadecimal value _\bH_\bH_\bH_\bH (one to four hex digits)
\\b\U\bU_\bH_\bH_\bH_\bH_\bH_\bH_\bH_\bH
- the Unicode (ISO/IEC 10646) character whose value is the
+ the Unicode (ISO/IEC 10646) character whose value is the
hexadecimal value _\bH_\bH_\bH_\bH_\bH_\bH_\bH_\bH (one to eight hex digits)
\\b\c\bc_\bx a control-_\bx character
- The expanded result is single-quoted, as if the dollar sign had not
+ The expanded result is single-quoted, as if the dollar sign had not
been present.
A double-quoted string preceded by a dollar sign ($\b$"_\bs_\bt_\br_\bi_\bn_\bg") will cause
- the string to be translated according to the current locale. If the
- current locale is C\bC or P\bPO\bOS\bSI\bIX\bX, the dollar sign is ignored. If the
+ the string to be translated according to the current locale. If the
+ current locale is C\bC or P\bPO\bOS\bSI\bIX\bX, the dollar sign is ignored. If the
string is translated and replaced, the replacement is double-quoted.
P\bPA\bAR\bRA\bAM\bME\bET\bTE\bER\bRS\bS
- A _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an entity that stores values. It can be a _\bn_\ba_\bm_\be, a num-
+ A _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an entity that stores values. It can be a _\bn_\ba_\bm_\be, a num-
ber, or one of the special characters listed below under S\bSp\bpe\bec\bci\bia\bal\bl P\bPa\bar\bra\bam\bm-\b-
- e\bet\bte\ber\brs\bs. A _\bv_\ba_\br_\bi_\ba_\bb_\bl_\be is a parameter denoted by a _\bn_\ba_\bm_\be. A variable has a
- _\bv_\ba_\bl_\bu_\be and zero or more _\ba_\bt_\bt_\br_\bi_\bb_\bu_\bt_\be_\bs. Attributes are assigned using the
- d\bde\bec\bcl\bla\bar\bre\be builtin command (see d\bde\bec\bcl\bla\bar\bre\be below in S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS).
+ e\bet\bte\ber\brs\bs. A _\bv_\ba_\br_\bi_\ba_\bb_\bl_\be is a parameter denoted by a _\bn_\ba_\bm_\be. A variable has a
+ _\bv_\ba_\bl_\bu_\be and zero or more _\ba_\bt_\bt_\br_\bi_\bb_\bu_\bt_\be_\bs. Attributes are assigned using the
+ d\bde\bec\bcl\bla\bar\bre\be builtin command (see d\bde\bec\bcl\bla\bar\bre\be below in S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS).
A parameter is set if it has been assigned a value. The null string is
- a valid value. Once a variable is set, it may be unset only by using
+ a valid value. Once a variable is set, it may be unset only by using
the u\bun\bns\bse\bet\bt builtin command (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
A _\bv_\ba_\br_\bi_\ba_\bb_\bl_\be may be assigned to by a statement of the form
_\bn_\ba_\bm_\be=[_\bv_\ba_\bl_\bu_\be]
- If _\bv_\ba_\bl_\bu_\be is not given, the variable is assigned the null string. All
- _\bv_\ba_\bl_\bu_\be_\bs undergo tilde expansion, parameter and variable expansion, com-
- mand substitution, arithmetic expansion, and quote removal (see E\bEX\bXP\bPA\bAN\bN-\b-
+ If _\bv_\ba_\bl_\bu_\be is not given, the variable is assigned the null string. All
+ _\bv_\ba_\bl_\bu_\be_\bs undergo tilde expansion, parameter and variable expansion, com-
+ mand substitution, arithmetic expansion, and quote removal (see E\bEX\bXP\bPA\bAN\bN-\b-
S\bSI\bIO\bON\bN below). If the variable has its i\bin\bnt\bte\beg\bge\ber\br attribute set, then _\bv_\ba_\bl_\bu_\be
is evaluated as an arithmetic expression even if the $((...)) expansion
- is not used (see A\bAr\bri\bit\bth\bhm\bme\bet\bti\bic\bc E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn below). Word splitting is not
- performed, with the exception of "\b"$\b$@\b@"\b" as explained below under S\bSp\bpe\bec\bci\bia\bal\bl
- P\bPa\bar\bra\bam\bme\bet\bte\ber\brs\bs. Pathname expansion is not performed. Assignment state-
- ments may also appear as arguments to the a\bal\bli\bia\bas\bs, d\bde\bec\bcl\bla\bar\bre\be, t\bty\byp\bpe\bes\bse\bet\bt,
+ is not used (see A\bAr\bri\bit\bth\bhm\bme\bet\bti\bic\bc E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn below). Word splitting is not
+ performed, with the exception of "\b"$\b$@\b@"\b" as explained below under S\bSp\bpe\bec\bci\bia\bal\bl
+ P\bPa\bar\bra\bam\bme\bet\bte\ber\brs\bs. Pathname expansion is not performed. Assignment state-
+ ments may also appear as arguments to the a\bal\bli\bia\bas\bs, d\bde\bec\bcl\bla\bar\bre\be, t\bty\byp\bpe\bes\bse\bet\bt,
e\bex\bxp\bpo\bor\brt\bt, r\bre\bea\bad\bdo\bon\bnl\bly\by, and l\blo\boc\bca\bal\bl builtin commands.
- In the context where an assignment statement is assigning a value to a
+ In the context where an assignment statement is assigning a value to a
shell variable or array index, the += operator can be used to append to
or add to the variable's previous value. When += is applied to a vari-
- able for which the _\bi_\bn_\bt_\be_\bg_\be_\br attribute has been set, _\bv_\ba_\bl_\bu_\be is evaluated
- as an arithmetic expression and added to the variable's current value,
+ able for which the _\bi_\bn_\bt_\be_\bg_\be_\br attribute has been set, _\bv_\ba_\bl_\bu_\be is evaluated
+ as an arithmetic expression and added to the variable's current value,
which is also evaluated. When += is applied to an array variable using
- compound assignment (see A\bAr\brr\bra\bay\bys\bs below), the variable's value is not
+ compound assignment (see A\bAr\brr\bra\bay\bys\bs below), the variable's value is not
unset (as it is when using =), and new values are appended to the array
- beginning at one greater than the array's maximum index (for indexed
+ beginning at one greater than the array's maximum index (for indexed
arrays) or added as additional key-value pairs in an associative array.
- When applied to a string-valued variable, _\bv_\ba_\bl_\bu_\be is expanded and
+ When applied to a string-valued variable, _\bv_\ba_\bl_\bu_\be is expanded and
appended to the variable's value.
P\bPo\bos\bsi\bit\bti\bio\bon\bna\bal\bl P\bPa\bar\bra\bam\bme\bet\bte\ber\brs\bs
- A _\bp_\bo_\bs_\bi_\bt_\bi_\bo_\bn_\ba_\bl _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is a parameter denoted by one or more digits,
+ A _\bp_\bo_\bs_\bi_\bt_\bi_\bo_\bn_\ba_\bl _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is a parameter denoted by one or more digits,
other than the single digit 0. Positional parameters are assigned from
- the shell's arguments when it is invoked, and may be reassigned using
- the s\bse\bet\bt builtin command. Positional parameters may not be assigned to
- with assignment statements. The positional parameters are temporarily
+ the shell's arguments when it is invoked, and may be reassigned using
+ the s\bse\bet\bt builtin command. Positional parameters may not be assigned to
+ with assignment statements. The positional parameters are temporarily
replaced when a shell function is executed (see F\bFU\bUN\bNC\bCT\bTI\bIO\bON\bNS\bS below).
- When a positional parameter consisting of more than a single digit is
+ When a positional parameter consisting of more than a single digit is
expanded, it must be enclosed in braces (see E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN below).
S\bSp\bpe\bec\bci\bia\bal\bl P\bPa\bar\bra\bam\bme\bet\bte\ber\brs\bs
- The shell treats several parameters specially. These parameters may
+ The shell treats several parameters specially. These parameters may
only be referenced; assignment to them is not allowed.
- *\b* Expands to the positional parameters, starting from one. When
- the expansion occurs within double quotes, it expands to a sin-
+ *\b* Expands to the positional parameters, starting from one. When
+ the expansion occurs within double quotes, it expands to a sin-
gle word with the value of each parameter separated by the first
character of the I\bIF\bFS\bS special variable. That is, "$\b$*\b*" is equiva-
lent to "$\b$1\b1_\bc$\b$2\b2_\bc.\b..\b..\b.", where _\bc is the first character of the value
- of the I\bIF\bFS\bS variable. If I\bIF\bFS\bS is unset, the parameters are sepa-
- rated by spaces. If I\bIF\bFS\bS is null, the parameters are joined
+ of the I\bIF\bFS\bS variable. If I\bIF\bFS\bS is unset, the parameters are sepa-
+ rated by spaces. If I\bIF\bFS\bS is null, the parameters are joined
without intervening separators.
- @\b@ Expands to the positional parameters, starting from one. When
+ @\b@ Expands to the positional parameters, starting from one. When
the expansion occurs within double quotes, each parameter
expands to a separate word. That is, "$\b$@\b@" is equivalent to "$\b$1\b1"
- "$\b$2\b2" ... If the double-quoted expansion occurs within a word,
- the expansion of the first parameter is joined with the begin-
- ning part of the original word, and the expansion of the last
- parameter is joined with the last part of the original word.
- When there are no positional parameters, "$\b$@\b@" and $\b$@\b@ expand to
+ "$\b$2\b2" ... If the double-quoted expansion occurs within a word,
+ the expansion of the first parameter is joined with the begin-
+ ning part of the original word, and the expansion of the last
+ parameter is joined with the last part of the original word.
+ When there are no positional parameters, "$\b$@\b@" and $\b$@\b@ expand to
nothing (i.e., they are removed).
#\b# Expands to the number of positional parameters in decimal.
- ?\b? Expands to the exit status of the most recently executed fore-
+ ?\b? Expands to the exit status of the most recently executed fore-
ground pipeline.
- -\b- Expands to the current option flags as specified upon invoca-
- tion, by the s\bse\bet\bt builtin command, or those set by the shell
+ -\b- Expands to the current option flags as specified upon invoca-
+ tion, by the s\bse\bet\bt builtin command, or those set by the shell
itself (such as the -\b-i\bi option).
- $\b$ Expands to the process ID of the shell. In a () subshell, it
- expands to the process ID of the current shell, not the sub-
+ $\b$ Expands to the process ID of the shell. In a () subshell, it
+ expands to the process ID of the current shell, not the sub-
shell.
- !\b! Expands to the process ID of the most recently executed back-
+ !\b! Expands to the process ID of the most recently executed back-
ground (asynchronous) command.
- 0\b0 Expands to the name of the shell or shell script. This is set
+ 0\b0 Expands to the name of the shell or shell script. This is set
at shell initialization. If b\bba\bas\bsh\bh is invoked with a file of com-
- mands, $\b$0\b0 is set to the name of that file. If b\bba\bas\bsh\bh is started
- with the -\b-c\bc option, then $\b$0\b0 is set to the first argument after
- the string to be executed, if one is present. Otherwise, it is
- set to the file name used to invoke b\bba\bas\bsh\bh, as given by argument
+ mands, $\b$0\b0 is set to the name of that file. If b\bba\bas\bsh\bh is started
+ with the -\b-c\bc option, then $\b$0\b0 is set to the first argument after
+ the string to be executed, if one is present. Otherwise, it is
+ set to the file name used to invoke b\bba\bas\bsh\bh, as given by argument
zero.
- _\b_ At shell startup, set to the absolute pathname used to invoke
- the shell or shell script being executed as passed in the envi-
- ronment or argument list. Subsequently, expands to the last
- argument to the previous command, after expansion. Also set to
- the full pathname used to invoke each command executed and
+ _\b_ At shell startup, set to the absolute pathname used to invoke
+ the shell or shell script being executed as passed in the envi-
+ ronment or argument list. Subsequently, expands to the last
+ argument to the previous command, after expansion. Also set to
+ the full pathname used to invoke each command executed and
placed in the environment exported to that command. When check-
- ing mail, this parameter holds the name of the mail file cur-
+ ing mail, this parameter holds the name of the mail file cur-
rently being checked.
S\bSh\bhe\bel\bll\bl V\bVa\bar\bri\bia\bab\bbl\ble\bes\bs
The following variables are set by the shell:
- B\bBA\bAS\bSH\bH Expands to the full file name used to invoke this instance of
+ B\bBA\bAS\bSH\bH Expands to the full file name used to invoke this instance of
b\bba\bas\bsh\bh.
B\bBA\bAS\bSH\bHO\bOP\bPT\bTS\bS
- A colon-separated list of enabled shell options. Each word in
- the list is a valid argument for the -\b-s\bs option to the s\bsh\bho\bop\bpt\bt
+ A colon-separated list of enabled shell options. Each word in
+ the list is a valid argument for the -\b-s\bs option to the s\bsh\bho\bop\bpt\bt
builtin command (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). The options
- appearing in B\bBA\bAS\bSH\bHO\bOP\bPT\bTS\bS are those reported as _\bo_\bn by s\bsh\bho\bop\bpt\bt. If
- this variable is in the environment when b\bba\bas\bsh\bh starts up, each
- shell option in the list will be enabled before reading any
+ appearing in B\bBA\bAS\bSH\bHO\bOP\bPT\bTS\bS are those reported as _\bo_\bn by s\bsh\bho\bop\bpt\bt. If
+ this variable is in the environment when b\bba\bas\bsh\bh starts up, each
+ shell option in the list will be enabled before reading any
startup files. This variable is read-only.
B\bBA\bAS\bSH\bHP\bPI\bID\bD
- Expands to the process ID of the current b\bba\bas\bsh\bh process. This
- differs from $\b$$\b$ under certain circumstances, such as subshells
+ Expands to the process ID of the current b\bba\bas\bsh\bh process. This
+ differs from $\b$$\b$ under certain circumstances, such as subshells
that do not require b\bba\bas\bsh\bh to be re-initialized.
B\bBA\bAS\bSH\bH_\b_A\bAL\bLI\bIA\bAS\bSE\bES\bS
- An associative array variable whose members correspond to the
- internal list of aliases as maintained by the a\bal\bli\bia\bas\bs builtin.
+ An associative array variable whose members correspond to the
+ internal list of aliases as maintained by the a\bal\bli\bia\bas\bs builtin.
Elements added to this array appear in the alias list; unsetting
- array elements cause aliases to be removed from the alias list.
+ array elements cause aliases to be removed from the alias list.
B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGC\bC
- An array variable whose values are the number of parameters in
+ An array variable whose values are the number of parameters in
each frame of the current b\bba\bas\bsh\bh execution call stack. The number
- of parameters to the current subroutine (shell function or
- script executed with .\b. or s\bso\bou\bur\brc\bce\be) is at the top of the stack.
- When a subroutine is executed, the number of parameters passed
+ of parameters to the current subroutine (shell function or
+ script executed with .\b. or s\bso\bou\bur\brc\bce\be) is at the top of the stack.
+ When a subroutine is executed, the number of parameters passed
is pushed onto B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGC\bC. The shell sets B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGC\bC only when in
- extended debugging mode (see the description of the e\bex\bxt\btd\bde\beb\bbu\bug\bg
+ extended debugging mode (see the description of the e\bex\bxt\btd\bde\beb\bbu\bug\bg
option to the s\bsh\bho\bop\bpt\bt builtin below)
B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGV\bV
- An array variable containing all of the parameters in the cur-
+ An array variable containing all of the parameters in the cur-
rent b\bba\bas\bsh\bh execution call stack. The final parameter of the last
- subroutine call is at the top of the stack; the first parameter
+ subroutine call is at the top of the stack; the first parameter
of the initial call is at the bottom. When a subroutine is exe-
- cuted, the parameters supplied are pushed onto B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGV\bV. The
- shell sets B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGV\bV only when in extended debugging mode (see
- the description of the e\bex\bxt\btd\bde\beb\bbu\bug\bg option to the s\bsh\bho\bop\bpt\bt builtin
+ cuted, the parameters supplied are pushed onto B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGV\bV. The
+ shell sets B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGV\bV only when in extended debugging mode (see
+ the description of the e\bex\bxt\btd\bde\beb\bbu\bug\bg option to the s\bsh\bho\bop\bpt\bt builtin
below)
B\bBA\bAS\bSH\bH_\b_C\bCM\bMD\bDS\bS
- An associative array variable whose members correspond to the
- internal hash table of commands as maintained by the h\bha\bas\bsh\bh
+ An associative array variable whose members correspond to the
+ internal hash table of commands as maintained by the h\bha\bas\bsh\bh
builtin. Elements added to this array appear in the hash table;
- unsetting array elements cause commands to be removed from the
+ unsetting array elements cause commands to be removed from the
hash table.
B\bBA\bAS\bSH\bH_\b_C\bCO\bOM\bMM\bMA\bAN\bND\bD
- The command currently being executed or about to be executed,
+ The command currently being executed or about to be executed,
unless the shell is executing a command as the result of a trap,
- in which case it is the command executing at the time of the
+ in which case it is the command executing at the time of the
trap.
B\bBA\bAS\bSH\bH_\b_E\bEX\bXE\bEC\bCU\bUT\bTI\bIO\bON\bN_\b_S\bST\bTR\bRI\bIN\bNG\bG
The command argument to the -\b-c\bc invocation option.
B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO
- An array variable whose members are the line numbers in source
- files where each corresponding member of F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE was invoked.
+ An array variable whose members are the line numbers in source
+ files where each corresponding member of F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE was invoked.
$\b${\b{B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO[\b[_\b$_\bi]\b]}\b} is the line number in the source file
($\b${\b{B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE[\b[_\b$_\bi_\b+_\b1]\b]}\b}) where $\b${\b{F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE[\b[_\b$_\bi]\b]}\b} was called (or
- $\b${\b{B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO[\b[_\b$_\bi_\b-_\b1]\b]}\b} if referenced within another shell func-
+ $\b${\b{B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO[\b[_\b$_\bi_\b-_\b1]\b]}\b} if referenced within another shell func-
tion). Use L\bLI\bIN\bNE\bEN\bNO\bO to obtain the current line number.
B\bBA\bAS\bSH\bH_\b_R\bRE\bEM\bMA\bAT\bTC\bCH\bH
- An array variable whose members are assigned by the =\b=~\b~ binary
- operator to the [\b[[\b[ conditional command. The element with index
- 0 is the portion of the string matching the entire regular
- expression. The element with index _\bn is the portion of the
+ An array variable whose members are assigned by the =\b=~\b~ binary
+ operator to the [\b[[\b[ conditional command. The element with index
+ 0 is the portion of the string matching the entire regular
+ expression. The element with index _\bn is the portion of the
string matching the _\bnth parenthesized subexpression. This vari-
able is read-only.
B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE
- An array variable whose members are the source filenames where
- the corresponding shell function names in the F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE array
- variable are defined. The shell function $\b${\b{F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE[\b[_\b$_\bi]\b]}\b} is
- defined in the file $\b${\b{B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE[\b[_\b$_\bi]\b]}\b} and called from
+ An array variable whose members are the source filenames where
+ the corresponding shell function names in the F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE array
+ variable are defined. The shell function $\b${\b{F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE[\b[_\b$_\bi]\b]}\b} is
+ defined in the file $\b${\b{B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE[\b[_\b$_\bi]\b]}\b} and called from
$\b${\b{B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE[\b[_\b$_\bi_\b+_\b1]\b]}\b}.
B\bBA\bAS\bSH\bH_\b_S\bSU\bUB\bBS\bSH\bHE\bEL\bLL\bL
- Incremented by one each time a subshell or subshell environment
+ Incremented by one each time a subshell or subshell environment
is spawned. The initial value is 0.
B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO
A readonly array variable whose members hold version information
- for this instance of b\bba\bas\bsh\bh. The values assigned to the array
+ for this instance of b\bba\bas\bsh\bh. The values assigned to the array
members are as follows:
- B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[0]\b] The major version number (the _\br_\be_\bl_\be_\ba_\bs_\be).
- B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[1]\b] The minor version number (the _\bv_\be_\br_\bs_\bi_\bo_\bn).
+ B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[0]\b] The major version number (the _\br_\be_\bl_\be_\ba_\bs_\be).
+ B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[1]\b] The minor version number (the _\bv_\be_\br_\bs_\bi_\bo_\bn).
B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[2]\b] The patch level.
B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[3]\b] The build version.
B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[4]\b] The release status (e.g., _\bb_\be_\bt_\ba_\b1).
B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIN\bNF\bFO\bO[\b[5]\b] The value of M\bMA\bAC\bCH\bHT\bTY\bYP\bPE\bE.
B\bBA\bAS\bSH\bH_\b_V\bVE\bER\bRS\bSI\bIO\bON\bN
- Expands to a string describing the version of this instance of
+ Expands to a string describing the version of this instance of
b\bba\bas\bsh\bh.
C\bCO\bOM\bMP\bP_\b_C\bCW\bWO\bOR\bRD\bD
- An index into $\b${\b{C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDS\bS}\b} of the word containing the current
+ An index into $\b${\b{C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDS\bS}\b} of the word containing the current
cursor position. This variable is available only in shell func-
- tions invoked by the programmable completion facilities (see
+ tions invoked by the programmable completion facilities (see
P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn below).
C\bCO\bOM\bMP\bP_\b_K\bKE\bEY\bY
rent completion function.
C\bCO\bOM\bMP\bP_\b_L\bLI\bIN\bNE\bE
- The current command line. This variable is available only in
- shell functions and external commands invoked by the pro-
- grammable completion facilities (see P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
+ The current command line. This variable is available only in
+ shell functions and external commands invoked by the pro-
+ grammable completion facilities (see P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
below).
C\bCO\bOM\bMP\bP_\b_P\bPO\bOI\bIN\bNT\bT
- The index of the current cursor position relative to the begin-
- ning of the current command. If the current cursor position is
+ The index of the current cursor position relative to the begin-
+ ning of the current command. If the current cursor position is
at the end of the current command, the value of this variable is
- equal to $\b${\b{#\b#C\bCO\bOM\bMP\bP_\b_L\bLI\bIN\bNE\bE}\b}. This variable is available only in
- shell functions and external commands invoked by the pro-
- grammable completion facilities (see P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
+ equal to $\b${\b{#\b#C\bCO\bOM\bMP\bP_\b_L\bLI\bIN\bNE\bE}\b}. This variable is available only in
+ shell functions and external commands invoked by the pro-
+ grammable completion facilities (see P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
below).
C\bCO\bOM\bMP\bP_\b_T\bTY\bYP\bPE\bE
- Set to an integer value corresponding to the type of completion
- attempted that caused a completion function to be called: _\bT_\bA_\bB,
- for normal completion, _\b?, for listing completions after succes-
- sive tabs, _\b!, for listing alternatives on partial word comple-
- tion, _\b@, to list completions if the word is not unmodified, or
- _\b%, for menu completion. This variable is available only in
- shell functions and external commands invoked by the pro-
- grammable completion facilities (see P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
+ Set to an integer value corresponding to the type of completion
+ attempted that caused a completion function to be called: _\bT_\bA_\bB,
+ for normal completion, _\b?, for listing completions after succes-
+ sive tabs, _\b!, for listing alternatives on partial word comple-
+ tion, _\b@, to list completions if the word is not unmodified, or
+ _\b%, for menu completion. This variable is available only in
+ shell functions and external commands invoked by the pro-
+ grammable completion facilities (see P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
below).
C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDB\bBR\bRE\bEA\bAK\bKS\bS
- The set of characters that the r\bre\bea\bad\bdl\bli\bin\bne\be library treats as word
- separators when performing word completion. If C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDB\bBR\bRE\bEA\bAK\bKS\bS
- is unset, it loses its special properties, even if it is subse-
+ The set of characters that the r\bre\bea\bad\bdl\bli\bin\bne\be library treats as word
+ separators when performing word completion. If C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDB\bBR\bRE\bEA\bAK\bKS\bS
+ is unset, it loses its special properties, even if it is subse-
quently reset.
C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDS\bS
- An array variable (see A\bAr\brr\bra\bay\bys\bs below) consisting of the individ-
- ual words in the current command line. The line is split into
- words as r\bre\bea\bad\bdl\bli\bin\bne\be would split it, using C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDB\bBR\bRE\bEA\bAK\bKS\bS as
+ An array variable (see A\bAr\brr\bra\bay\bys\bs below) consisting of the individ-
+ ual words in the current command line. The line is split into
+ words as r\bre\bea\bad\bdl\bli\bin\bne\be would split it, using C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDB\bBR\bRE\bEA\bAK\bKS\bS as
described above. This variable is available only in shell func-
- tions invoked by the programmable completion facilities (see
+ tions invoked by the programmable completion facilities (see
P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn below).
- C\bCO\bOP\bPR\bRO\bOC\bC An array variable (see A\bAr\brr\bra\bay\bys\bs below) created to hold the file
- descriptors for output from and input to an unnamed coprocess
+ C\bCO\bOP\bPR\bRO\bOC\bC An array variable (see A\bAr\brr\bra\bay\bys\bs below) created to hold the file
+ descriptors for output from and input to an unnamed coprocess
(see C\bCo\bop\bpr\bro\boc\bce\bes\bss\bse\bes\bs above).
D\bDI\bIR\bRS\bST\bTA\bAC\bCK\bK
An array variable (see A\bAr\brr\bra\bay\bys\bs below) containing the current con-
- tents of the directory stack. Directories appear in the stack
- in the order they are displayed by the d\bdi\bir\brs\bs builtin. Assigning
+ tents of the directory stack. Directories appear in the stack
+ in the order they are displayed by the d\bdi\bir\brs\bs builtin. Assigning
to members of this array variable may be used to modify directo-
- ries already in the stack, but the p\bpu\bus\bsh\bhd\bd and p\bpo\bop\bpd\bd builtins must
+ ries already in the stack, but the p\bpu\bus\bsh\bhd\bd and p\bpo\bop\bpd\bd builtins must
be used to add and remove directories. Assignment to this vari-
- able will not change the current directory. If D\bDI\bIR\bRS\bST\bTA\bAC\bCK\bK is
- unset, it loses its special properties, even if it is subse-
+ able will not change the current directory. If D\bDI\bIR\bRS\bST\bTA\bAC\bCK\bK is
+ unset, it loses its special properties, even if it is subse-
quently reset.
- E\bEU\bUI\bID\bD Expands to the effective user ID of the current user, initial-
+ E\bEU\bUI\bID\bD Expands to the effective user ID of the current user, initial-
ized at shell startup. This variable is readonly.
F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE
- An array variable containing the names of all shell functions
+ An array variable containing the names of all shell functions
currently in the execution call stack. The element with index 0
is the name of any currently-executing shell function. The bot-
- tom-most element (the one with the highest index) is "main".
- This variable exists only when a shell function is executing.
- Assignments to F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE have no effect and return an error sta-
- tus. If F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE is unset, it loses its special properties,
+ tom-most element (the one with the highest index) is "main".
+ This variable exists only when a shell function is executing.
+ Assignments to F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE have no effect and return an error sta-
+ tus. If F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE is unset, it loses its special properties,
even if it is subsequently reset.
- This variable can be used with B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO and B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE.
- Each element of F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE has corresponding elements in
- B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO and B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE to describe the call stack. For
- instance, $\b${\b{F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE[\b[_\b$_\bi]\b]}\b} was called from the file
- $\b${\b{B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE[\b[_\b$_\bi_\b+_\b1]\b]}\b} at line number $\b${\b{B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO[\b[_\b$_\bi]\b]}\b}. The
+ This variable can be used with B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO and B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE.
+ Each element of F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE has corresponding elements in
+ B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO and B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE to describe the call stack. For
+ instance, $\b${\b{F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE[\b[_\b$_\bi]\b]}\b} was called from the file
+ $\b${\b{B\bBA\bAS\bSH\bH_\b_S\bSO\bOU\bUR\bRC\bCE\bE[\b[_\b$_\bi_\b+_\b1]\b]}\b} at line number $\b${\b{B\bBA\bAS\bSH\bH_\b_L\bLI\bIN\bNE\bEN\bNO\bO[\b[_\b$_\bi]\b]}\b}. The
c\bca\bal\bll\ble\ber\br builtin displays the current call stack using this infor-
mation.
- G\bGR\bRO\bOU\bUP\bPS\bS An array variable containing the list of groups of which the
- current user is a member. Assignments to G\bGR\bRO\bOU\bUP\bPS\bS have no effect
- and return an error status. If G\bGR\bRO\bOU\bUP\bPS\bS is unset, it loses its
+ G\bGR\bRO\bOU\bUP\bPS\bS An array variable containing the list of groups of which the
+ current user is a member. Assignments to G\bGR\bRO\bOU\bUP\bPS\bS have no effect
+ and return an error status. If G\bGR\bRO\bOU\bUP\bPS\bS is unset, it loses its
special properties, even if it is subsequently reset.
H\bHI\bIS\bST\bTC\bCM\bMD\bD
The history number, or index in the history list, of the current
- command. If H\bHI\bIS\bST\bTC\bCM\bMD\bD is unset, it loses its special properties,
+ command. If H\bHI\bIS\bST\bTC\bCM\bMD\bD is unset, it loses its special properties,
even if it is subsequently reset.
H\bHO\bOS\bST\bTN\bNA\bAM\bME\bE
Automatically set to the name of the current host.
H\bHO\bOS\bST\bTT\bTY\bYP\bPE\bE
- Automatically set to a string that uniquely describes the type
- of machine on which b\bba\bas\bsh\bh is executing. The default is system-
+ Automatically set to a string that uniquely describes the type
+ of machine on which b\bba\bas\bsh\bh is executing. The default is system-
dependent.
- L\bLI\bIN\bNE\bEN\bNO\bO Each time this parameter is referenced, the shell substitutes a
- decimal number representing the current sequential line number
- (starting with 1) within a script or function. When not in a
- script or function, the value substituted is not guaranteed to
+ L\bLI\bIN\bNE\bEN\bNO\bO Each time this parameter is referenced, the shell substitutes a
+ decimal number representing the current sequential line number
+ (starting with 1) within a script or function. When not in a
+ script or function, the value substituted is not guaranteed to
be meaningful. If L\bLI\bIN\bNE\bEN\bNO\bO is unset, it loses its special proper-
ties, even if it is subsequently reset.
M\bMA\bAC\bCH\bHT\bTY\bYP\bPE\bE
- Automatically set to a string that fully describes the system
- type on which b\bba\bas\bsh\bh is executing, in the standard GNU _\bc_\bp_\bu_\b-_\bc_\bo_\bm_\b-
+ Automatically set to a string that fully describes the system
+ type on which b\bba\bas\bsh\bh is executing, in the standard GNU _\bc_\bp_\bu_\b-_\bc_\bo_\bm_\b-
_\bp_\ba_\bn_\by_\b-_\bs_\by_\bs_\bt_\be_\bm format. The default is system-dependent.
M\bMA\bAP\bPF\bFI\bIL\bLE\bE
- An array variable (see A\bAr\brr\bra\bay\bys\bs below) created to hold the text
+ An array variable (see A\bAr\brr\bra\bay\bys\bs below) created to hold the text
read by the m\bma\bap\bpf\bfi\bil\ble\be builtin when no variable name is supplied.
O\bOL\bLD\bDP\bPW\bWD\bD The previous working directory as set by the c\bcd\bd command.
- O\bOP\bPT\bTA\bAR\bRG\bG The value of the last option argument processed by the g\bge\bet\bto\bop\bpt\bts\bs
+ O\bOP\bPT\bTA\bAR\bRG\bG The value of the last option argument processed by the g\bge\bet\bto\bop\bpt\bts\bs
builtin command (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
- O\bOP\bPT\bTI\bIN\bND\bD The index of the next argument to be processed by the g\bge\bet\bto\bop\bpt\bts\bs
+ O\bOP\bPT\bTI\bIN\bND\bD The index of the next argument to be processed by the g\bge\bet\bto\bop\bpt\bts\bs
builtin command (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
- O\bOS\bST\bTY\bYP\bPE\bE Automatically set to a string that describes the operating sys-
- tem on which b\bba\bas\bsh\bh is executing. The default is system-depen-
+ O\bOS\bST\bTY\bYP\bPE\bE Automatically set to a string that describes the operating sys-
+ tem on which b\bba\bas\bsh\bh is executing. The default is system-depen-
dent.
P\bPI\bIP\bPE\bES\bST\bTA\bAT\bTU\bUS\bS
- An array variable (see A\bAr\brr\bra\bay\bys\bs below) containing a list of exit
- status values from the processes in the most-recently-executed
+ An array variable (see A\bAr\brr\bra\bay\bys\bs below) containing a list of exit
+ status values from the processes in the most-recently-executed
foreground pipeline (which may contain only a single command).
- P\bPP\bPI\bID\bD The process ID of the shell's parent. This variable is read-
+ P\bPP\bPI\bID\bD The process ID of the shell's parent. This variable is read-
only.
P\bPW\bWD\bD The current working directory as set by the c\bcd\bd command.
R\bRA\bAN\bND\bDO\bOM\bM Each time this parameter is referenced, a random integer between
0 and 32767 is generated. The sequence of random numbers may be
initialized by assigning a value to R\bRA\bAN\bND\bDO\bOM\bM. If R\bRA\bAN\bND\bDO\bOM\bM is unset,
- it loses its special properties, even if it is subsequently
+ it loses its special properties, even if it is subsequently
reset.
R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE_\b_L\bLI\bIN\bNE\bE
The position of the insertion point in the r\bre\bea\bad\bdl\bli\bin\bne\be line buffer,
for use with "bind -x" (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
- R\bRE\bEP\bPL\bLY\bY Set to the line of input read by the r\bre\bea\bad\bd builtin command when
+ R\bRE\bEP\bPL\bLY\bY Set to the line of input read by the r\bre\bea\bad\bd builtin command when
no arguments are supplied.
S\bSE\bEC\bCO\bON\bND\bDS\bS
- Each time this parameter is referenced, the number of seconds
- since shell invocation is returned. If a value is assigned to
- S\bSE\bEC\bCO\bON\bND\bDS\bS, the value returned upon subsequent references is the
- number of seconds since the assignment plus the value assigned.
+ Each time this parameter is referenced, the number of seconds
+ since shell invocation is returned. If a value is assigned to
+ S\bSE\bEC\bCO\bON\bND\bDS\bS, the value returned upon subsequent references is the
+ number of seconds since the assignment plus the value assigned.
If S\bSE\bEC\bCO\bON\bND\bDS\bS is unset, it loses its special properties, even if it
is subsequently reset.
S\bSH\bHE\bEL\bLL\bLO\bOP\bPT\bTS\bS
- A colon-separated list of enabled shell options. Each word in
- the list is a valid argument for the -\b-o\bo option to the s\bse\bet\bt
+ A colon-separated list of enabled shell options. Each word in
+ the list is a valid argument for the -\b-o\bo option to the s\bse\bet\bt
builtin command (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). The options
- appearing in S\bSH\bHE\bEL\bLL\bLO\bOP\bPT\bTS\bS are those reported as _\bo_\bn by s\bse\bet\bt -\b-o\bo. If
- this variable is in the environment when b\bba\bas\bsh\bh starts up, each
- shell option in the list will be enabled before reading any
+ appearing in S\bSH\bHE\bEL\bLL\bLO\bOP\bPT\bTS\bS are those reported as _\bo_\bn by s\bse\bet\bt -\b-o\bo. If
+ this variable is in the environment when b\bba\bas\bsh\bh starts up, each
+ shell option in the list will be enabled before reading any
startup files. This variable is read-only.
S\bSH\bHL\bLV\bVL\bL Incremented by one each time an instance of b\bba\bas\bsh\bh is started.
U\bUI\bID\bD Expands to the user ID of the current user, initialized at shell
startup. This variable is readonly.
- The following variables are used by the shell. In some cases, b\bba\bas\bsh\bh
+ The following variables are used by the shell. In some cases, b\bba\bas\bsh\bh
assigns a default value to a variable; these cases are noted below.
B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV
- If this parameter is set when b\bba\bas\bsh\bh is executing a shell script,
- its value is interpreted as a filename containing commands to
+ If this parameter is set when b\bba\bas\bsh\bh is executing a shell script,
+ its value is interpreted as a filename containing commands to
initialize the shell, as in _\b~_\b/_\b._\bb_\ba_\bs_\bh_\br_\bc. The value of B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV is
- subjected to parameter expansion, command substitution, and
- arithmetic expansion before being interpreted as a file name.
+ subjected to parameter expansion, command substitution, and
+ arithmetic expansion before being interpreted as a file name.
P\bPA\bAT\bTH\bH is not used to search for the resultant file name.
B\bBA\bAS\bSH\bH_\b_X\bXT\bTR\bRA\bAC\bCE\bEF\bFD\bD
- If set to an integer corresponding to a valid file descriptor,
- b\bba\bas\bsh\bh will write the trace output generated when _\bs_\be_\bt _\b-_\bx is
- enabled to that file descriptor. The file descriptor is closed
- when B\bBA\bAS\bSH\bH_\b_X\bXT\bTR\bRA\bAC\bCE\bEF\bFD\bD is unset or assigned a new value. Unsetting
- B\bBA\bAS\bSH\bH_\b_X\bXT\bTR\bRA\bAC\bCE\bEF\bFD\bD or assigning it the empty string causes the trace
- output to be sent to the standard error. Note that setting
+ If set to an integer corresponding to a valid file descriptor,
+ b\bba\bas\bsh\bh will write the trace output generated when _\bs_\be_\bt _\b-_\bx is
+ enabled to that file descriptor. The file descriptor is closed
+ when B\bBA\bAS\bSH\bH_\b_X\bXT\bTR\bRA\bAC\bCE\bEF\bFD\bD is unset or assigned a new value. Unsetting
+ B\bBA\bAS\bSH\bH_\b_X\bXT\bTR\bRA\bAC\bCE\bEF\bFD\bD or assigning it the empty string causes the trace
+ output to be sent to the standard error. Note that setting
B\bBA\bAS\bSH\bH_\b_X\bXT\bTR\bRA\bAC\bCE\bEF\bFD\bD to 2 (the standard error file descriptor) and then
unsetting it will result in the standard error being closed.
- C\bCD\bDP\bPA\bAT\bTH\bH The search path for the c\bcd\bd command. This is a colon-separated
- list of directories in which the shell looks for destination
- directories specified by the c\bcd\bd command. A sample value is
+ C\bCD\bDP\bPA\bAT\bTH\bH The search path for the c\bcd\bd command. This is a colon-separated
+ list of directories in which the shell looks for destination
+ directories specified by the c\bcd\bd command. A sample value is
".:~:/usr".
C\bCO\bOL\bLU\bUM\bMN\bNS\bS
- Used by the s\bse\bel\ble\bec\bct\bt builtin command to determine the terminal
- width when printing selection lists. Automatically set upon
+ Used by the s\bse\bel\ble\bec\bct\bt compound command to determine the terminal
+ width when printing selection lists. Automatically set upon
receipt of a S\bSI\bIG\bGW\bWI\bIN\bNC\bCH\bH.
C\bCO\bOM\bMP\bPR\bRE\bEP\bPL\bLY\bY
An array variable from which b\bba\bas\bsh\bh reads the possible completions
- generated by a shell function invoked by the programmable com-
+ generated by a shell function invoked by the programmable com-
pletion facility (see P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn below).
- E\bEM\bMA\bAC\bCS\bS If b\bba\bas\bsh\bh finds this variable in the environment when the shell
- starts with value "t", it assumes that the shell is running in
+ E\bEM\bMA\bAC\bCS\bS If b\bba\bas\bsh\bh finds this variable in the environment when the shell
+ starts with value "t", it assumes that the shell is running in
an Emacs shell buffer and disables line editing.
- E\bEN\bNV\bV Similar to B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV; used when the shell is invoked in POSIX
+ E\bEN\bNV\bV Similar to B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV; used when the shell is invoked in POSIX
mode.
F\bFC\bCE\bED\bDI\bIT\bT The default editor for the f\bfc\bc builtin command.
F\bFI\bIG\bGN\bNO\bOR\bRE\bE
- A colon-separated list of suffixes to ignore when performing
+ A colon-separated list of suffixes to ignore when performing
filename completion (see R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE below). A filename whose suf-
- fix matches one of the entries in F\bFI\bIG\bGN\bNO\bOR\bRE\bE is excluded from the
+ fix matches one of the entries in F\bFI\bIG\bGN\bNO\bOR\bRE\bE is excluded from the
list of matched filenames. A sample value is ".o:~".
F\bFU\bUN\bNC\bCN\bNE\bES\bST\bT
- If set to a numeric value greater than 0, defines a maximum
- function nesting level. Function invocations that exceed this
+ If set to a numeric value greater than 0, defines a maximum
+ function nesting level. Function invocations that exceed this
nesting level will cause the current command to abort.
G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE
A colon-separated list of patterns defining the set of filenames
to be ignored by pathname expansion. If a filename matched by a
- pathname expansion pattern also matches one of the patterns in
+ pathname expansion pattern also matches one of the patterns in
G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE, it is removed from the list of matches.
H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL
- A colon-separated list of values controlling how commands are
- saved on the history list. If the list of values includes
- _\bi_\bg_\bn_\bo_\br_\be_\bs_\bp_\ba_\bc_\be, lines which begin with a s\bsp\bpa\bac\bce\be character are not
- saved in the history list. A value of _\bi_\bg_\bn_\bo_\br_\be_\bd_\bu_\bp_\bs causes lines
+ A colon-separated list of values controlling how commands are
+ saved on the history list. If the list of values includes
+ _\bi_\bg_\bn_\bo_\br_\be_\bs_\bp_\ba_\bc_\be, lines which begin with a s\bsp\bpa\bac\bce\be character are not
+ saved in the history list. A value of _\bi_\bg_\bn_\bo_\br_\be_\bd_\bu_\bp_\bs causes lines
matching the previous history entry to not be saved. A value of
_\bi_\bg_\bn_\bo_\br_\be_\bb_\bo_\bt_\bh is shorthand for _\bi_\bg_\bn_\bo_\br_\be_\bs_\bp_\ba_\bc_\be and _\bi_\bg_\bn_\bo_\br_\be_\bd_\bu_\bp_\bs. A value
of _\be_\br_\ba_\bs_\be_\bd_\bu_\bp_\bs causes all previous lines matching the current line
- to be removed from the history list before that line is saved.
- Any value not in the above list is ignored. If H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL is
- unset, or does not include a valid value, all lines read by the
+ to be removed from the history list before that line is saved.
+ Any value not in the above list is ignored. If H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL is
+ unset, or does not include a valid value, all lines read by the
shell parser are saved on the history list, subject to the value
- of H\bHI\bIS\bST\bTI\bIG\bGN\bNO\bOR\bRE\bE. The second and subsequent lines of a multi-line
- compound command are not tested, and are added to the history
+ of H\bHI\bIS\bST\bTI\bIG\bGN\bNO\bOR\bRE\bE. The second and subsequent lines of a multi-line
+ compound command are not tested, and are added to the history
regardless of the value of H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL.
H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE
The name of the file in which command history is saved (see H\bHI\bIS\bS-\b-
- T\bTO\bOR\bRY\bY below). The default value is _\b~_\b/_\b._\bb_\ba_\bs_\bh_\b__\bh_\bi_\bs_\bt_\bo_\br_\by. If unset,
- the command history is not saved when an interactive shell
+ T\bTO\bOR\bRY\bY below). The default value is _\b~_\b/_\b._\bb_\ba_\bs_\bh_\b__\bh_\bi_\bs_\bt_\bo_\br_\by. If unset,
+ the command history is not saved when an interactive shell
exits.
H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bES\bSI\bIZ\bZE\bE
The maximum number of lines contained in the history file. When
- this variable is assigned a value, the history file is trun-
- cated, if necessary, by removing the oldest entries, to contain
- no more than that number of lines. The default value is 500.
+ this variable is assigned a value, the history file is trun-
+ cated, if necessary, by removing the oldest entries, to contain
+ no more than that number of lines. The default value is 500.
The history file is also truncated to this size after writing it
when an interactive shell exits.
H\bHI\bIS\bST\bTI\bIG\bGN\bNO\bOR\bRE\bE
- A colon-separated list of patterns used to decide which command
- lines should be saved on the history list. Each pattern is
- anchored at the beginning of the line and must match the com-
- plete line (no implicit `*\b*' is appended). Each pattern is
- tested against the line after the checks specified by H\bHI\bIS\bST\bTC\bCO\bON\bN-\b-
- T\bTR\bRO\bOL\bL are applied. In addition to the normal shell pattern
+ A colon-separated list of patterns used to decide which command
+ lines should be saved on the history list. Each pattern is
+ anchored at the beginning of the line and must match the com-
+ plete line (no implicit `*\b*' is appended). Each pattern is
+ tested against the line after the checks specified by H\bHI\bIS\bST\bTC\bCO\bON\bN-\b-
+ T\bTR\bRO\bOL\bL are applied. In addition to the normal shell pattern
matching characters, `&\b&' matches the previous history line. `&\b&'
- may be escaped using a backslash; the backslash is removed
+ may be escaped using a backslash; the backslash is removed
before attempting a match. The second and subsequent lines of a
multi-line compound command are not tested, and are added to the
history regardless of the value of H\bHI\bIS\bST\bTI\bIG\bGN\bNO\bOR\bRE\bE.
H\bHI\bIS\bST\bTS\bSI\bIZ\bZE\bE
- The number of commands to remember in the command history (see
+ The number of commands to remember in the command history (see
H\bHI\bIS\bST\bTO\bOR\bRY\bY below). The default value is 500.
H\bHI\bIS\bST\bTT\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT
- If this variable is set and not null, its value is used as a
+ If this variable is set and not null, its value is used as a
format string for _\bs_\bt_\br_\bf_\bt_\bi_\bm_\be(3) to print the time stamp associated
- with each history entry displayed by the h\bhi\bis\bst\bto\bor\bry\by builtin. If
- this variable is set, time stamps are written to the history
- file so they may be preserved across shell sessions. This uses
- the history comment character to distinguish timestamps from
+ with each history entry displayed by the h\bhi\bis\bst\bto\bor\bry\by builtin. If
+ this variable is set, time stamps are written to the history
+ file so they may be preserved across shell sessions. This uses
+ the history comment character to distinguish timestamps from
other history lines.
H\bHO\bOM\bME\bE The home directory of the current user; the default argument for
the c\bcd\bd builtin command. The value of this variable is also used
when performing tilde expansion.
H\bHO\bOS\bST\bTF\bFI\bIL\bLE\bE
- Contains the name of a file in the same format as _\b/_\be_\bt_\bc_\b/_\bh_\bo_\bs_\bt_\bs
+ Contains the name of a file in the same format as _\b/_\be_\bt_\bc_\b/_\bh_\bo_\bs_\bt_\bs
that should be read when the shell needs to complete a hostname.
- The list of possible hostname completions may be changed while
- the shell is running; the next time hostname completion is
- attempted after the value is changed, b\bba\bas\bsh\bh adds the contents of
- the new file to the existing list. If H\bHO\bOS\bST\bTF\bFI\bIL\bLE\bE is set, but has
- no value, or does not name a readable file, b\bba\bas\bsh\bh attempts to
- read _\b/_\be_\bt_\bc_\b/_\bh_\bo_\bs_\bt_\bs to obtain the list of possible hostname comple-
+ The list of possible hostname completions may be changed while
+ the shell is running; the next time hostname completion is
+ attempted after the value is changed, b\bba\bas\bsh\bh adds the contents of
+ the new file to the existing list. If H\bHO\bOS\bST\bTF\bFI\bIL\bLE\bE is set, but has
+ no value, or does not name a readable file, b\bba\bas\bsh\bh attempts to
+ read _\b/_\be_\bt_\bc_\b/_\bh_\bo_\bs_\bt_\bs to obtain the list of possible hostname comple-
tions. When H\bHO\bOS\bST\bTF\bFI\bIL\bLE\bE is unset, the hostname list is cleared.
- I\bIF\bFS\bS The _\bI_\bn_\bt_\be_\br_\bn_\ba_\bl _\bF_\bi_\be_\bl_\bd _\bS_\be_\bp_\ba_\br_\ba_\bt_\bo_\br that is used for word splitting
- after expansion and to split lines into words with the r\bre\bea\bad\bd
+ I\bIF\bFS\bS The _\bI_\bn_\bt_\be_\br_\bn_\ba_\bl _\bF_\bi_\be_\bl_\bd _\bS_\be_\bp_\ba_\br_\ba_\bt_\bo_\br that is used for word splitting
+ after expansion and to split lines into words with the r\bre\bea\bad\bd
builtin command. The default value is ``<space><tab><new-
line>''.
I\bIG\bGN\bNO\bOR\bRE\bEE\bEO\bOF\bF
Controls the action of an interactive shell on receipt of an E\bEO\bOF\bF
character as the sole input. If set, the value is the number of
- consecutive E\bEO\bOF\bF characters which must be typed as the first
- characters on an input line before b\bba\bas\bsh\bh exits. If the variable
- exists but does not have a numeric value, or has no value, the
- default value is 10. If it does not exist, E\bEO\bOF\bF signifies the
+ consecutive E\bEO\bOF\bF characters which must be typed as the first
+ characters on an input line before b\bba\bas\bsh\bh exits. If the variable
+ exists but does not have a numeric value, or has no value, the
+ default value is 10. If it does not exist, E\bEO\bOF\bF signifies the
end of input to the shell.
I\bIN\bNP\bPU\bUT\bTR\bRC\bC
- The filename for the r\bre\bea\bad\bdl\bli\bin\bne\be startup file, overriding the
+ The filename for the r\bre\bea\bad\bdl\bli\bin\bne\be startup file, overriding the
default of _\b~_\b/_\b._\bi_\bn_\bp_\bu_\bt_\br_\bc (see R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE below).
- L\bLA\bAN\bNG\bG Used to determine the locale category for any category not
+ L\bLA\bAN\bNG\bG Used to determine the locale category for any category not
specifically selected with a variable starting with L\bLC\bC_\b_.
- L\bLC\bC_\b_A\bAL\bLL\bL This variable overrides the value of L\bLA\bAN\bNG\bG and any other L\bLC\bC_\b_
+ L\bLC\bC_\b_A\bAL\bLL\bL This variable overrides the value of L\bLA\bAN\bNG\bG and any other L\bLC\bC_\b_
variable specifying a locale category.
L\bLC\bC_\b_C\bCO\bOL\bLL\bLA\bAT\bTE\bE
- This variable determines the collation order used when sorting
- the results of pathname expansion, and determines the behavior
- of range expressions, equivalence classes, and collating
+ This variable determines the collation order used when sorting
+ the results of pathname expansion, and determines the behavior
+ of range expressions, equivalence classes, and collating
sequences within pathname expansion and pattern matching.
L\bLC\bC_\b_C\bCT\bTY\bYP\bPE\bE
- This variable determines the interpretation of characters and
- the behavior of character classes within pathname expansion and
+ This variable determines the interpretation of characters and
+ the behavior of character classes within pathname expansion and
pattern matching.
L\bLC\bC_\b_M\bME\bES\bSS\bSA\bAG\bGE\bES\bS
- This variable determines the locale used to translate double-
+ This variable determines the locale used to translate double-
quoted strings preceded by a $\b$.
L\bLC\bC_\b_N\bNU\bUM\bME\bER\bRI\bIC\bC
- This variable determines the locale category used for number
+ This variable determines the locale category used for number
formatting.
- L\bLI\bIN\bNE\bES\bS Used by the s\bse\bel\ble\bec\bct\bt builtin command to determine the column
- length for printing selection lists. Automatically set upon
+ L\bLI\bIN\bNE\bES\bS Used by the s\bse\bel\ble\bec\bct\bt compound command to determine the column
+ length for printing selection lists. Automatically set upon
receipt of a S\bSI\bIG\bGW\bWI\bIN\bNC\bCH\bH.
- M\bMA\bAI\bIL\bL If this parameter is set to a file or directory name and the
- M\bMA\bAI\bIL\bLP\bPA\bAT\bTH\bH variable is not set, b\bba\bas\bsh\bh informs the user of the
- arrival of mail in the specified file or Maildir-format direc-
+ M\bMA\bAI\bIL\bL If this parameter is set to a file or directory name and the
+ M\bMA\bAI\bIL\bLP\bPA\bAT\bTH\bH variable is not set, b\bba\bas\bsh\bh informs the user of the
+ arrival of mail in the specified file or Maildir-format direc-
tory.
M\bMA\bAI\bIL\bLC\bCH\bHE\bEC\bCK\bK
- Specifies how often (in seconds) b\bba\bas\bsh\bh checks for mail. The
- default is 60 seconds. When it is time to check for mail, the
- shell does so before displaying the primary prompt. If this
- variable is unset, or set to a value that is not a number
+ Specifies how often (in seconds) b\bba\bas\bsh\bh checks for mail. The
+ default is 60 seconds. When it is time to check for mail, the
+ shell does so before displaying the primary prompt. If this
+ variable is unset, or set to a value that is not a number
greater than or equal to zero, the shell disables mail checking.
M\bMA\bAI\bIL\bLP\bPA\bAT\bTH\bH
- A colon-separated list of file names to be checked for mail.
+ A colon-separated list of file names to be checked for mail.
The message to be printed when mail arrives in a particular file
- may be specified by separating the file name from the message
+ may be specified by separating the file name from the message
with a `?'. When used in the text of the message, $\b$_\b_ expands to
the name of the current mailfile. Example:
M\bMA\bAI\bIL\bLP\bPA\bAT\bTH\bH='/var/mail/bfox?"You have mail":~/shell-mail?"$_ has
mail!"'
- B\bBa\bas\bsh\bh supplies a default value for this variable, but the loca-
- tion of the user mail files that it uses is system dependent
+ B\bBa\bas\bsh\bh supplies a default value for this variable, but the loca-
+ tion of the user mail files that it uses is system dependent
(e.g., /var/mail/$\b$U\bUS\bSE\bER\bR).
O\bOP\bPT\bTE\bER\bRR\bR If set to the value 1, b\bba\bas\bsh\bh displays error messages generated by
- the g\bge\bet\bto\bop\bpt\bts\bs builtin command (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
- O\bOP\bPT\bTE\bER\bRR\bR is initialized to 1 each time the shell is invoked or a
+ the g\bge\bet\bto\bop\bpt\bts\bs builtin command (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
+ O\bOP\bPT\bTE\bER\bRR\bR is initialized to 1 each time the shell is invoked or a
shell script is executed.
- P\bPA\bAT\bTH\bH The search path for commands. It is a colon-separated list of
- directories in which the shell looks for commands (see C\bCO\bOM\bMM\bMA\bAN\bND\bD
- E\bEX\bXE\bEC\bCU\bUT\bTI\bIO\bON\bN below). A zero-length (null) directory name in the
+ P\bPA\bAT\bTH\bH The search path for commands. It is a colon-separated list of
+ directories in which the shell looks for commands (see C\bCO\bOM\bMM\bMA\bAN\bND\bD
+ E\bEX\bXE\bEC\bCU\bUT\bTI\bIO\bON\bN below). A zero-length (null) directory name in the
value of P\bPA\bAT\bTH\bH indicates the current directory. A null directory
- name may appear as two adjacent colons, or as an initial or
- trailing colon. The default path is system-dependent, and is
- set by the administrator who installs b\bba\bas\bsh\bh. A common value is
+ name may appear as two adjacent colons, or as an initial or
+ trailing colon. The default path is system-dependent, and is
+ set by the administrator who installs b\bba\bas\bsh\bh. A common value is
``/usr/gnu/bin:/usr/local/bin:/usr/ucb:/bin:/usr/bin''.
P\bPO\bOS\bSI\bIX\bXL\bLY\bY_\b_C\bCO\bOR\bRR\bRE\bEC\bCT\bT
- If this variable is in the environment when b\bba\bas\bsh\bh starts, the
- shell enters _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be before reading the startup files, as if
- the -\b--\b-p\bpo\bos\bsi\bix\bx invocation option had been supplied. If it is set
- while the shell is running, b\bba\bas\bsh\bh enables _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be, as if the
+ If this variable is in the environment when b\bba\bas\bsh\bh starts, the
+ shell enters _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be before reading the startup files, as if
+ the -\b--\b-p\bpo\bos\bsi\bix\bx invocation option had been supplied. If it is set
+ while the shell is running, b\bba\bas\bsh\bh enables _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be, as if the
command _\bs_\be_\bt _\b-_\bo _\bp_\bo_\bs_\bi_\bx had been executed.
P\bPR\bRO\bOM\bMP\bPT\bT_\b_C\bCO\bOM\bMM\bMA\bAN\bND\bD
If set, the value is executed as a command prior to issuing each
primary prompt.
P\bPR\bRO\bOM\bMP\bPT\bT_\b_D\bDI\bIR\bRT\bTR\bRI\bIM\bM
- If set to a number greater than zero, the value is used as the
+ If set to a number greater than zero, the value is used as the
number of trailing directory components to retain when expanding
- the \\b\w\bw and \\b\W\bW prompt string escapes (see P\bPR\bRO\bOM\bMP\bPT\bTI\bIN\bNG\bG below).
+ the \\b\w\bw and \\b\W\bW prompt string escapes (see P\bPR\bRO\bOM\bMP\bPT\bTI\bIN\bNG\bG below).
Characters removed are replaced with an ellipsis.
- P\bPS\bS1\b1 The value of this parameter is expanded (see P\bPR\bRO\bOM\bMP\bPT\bTI\bIN\bNG\bG below)
- and used as the primary prompt string. The default value is
+ P\bPS\bS1\b1 The value of this parameter is expanded (see P\bPR\bRO\bOM\bMP\bPT\bTI\bIN\bNG\bG below)
+ and used as the primary prompt string. The default value is
``\\b\s\bs-\b-\\b\v\bv\\b\$\b$ ''.
- P\bPS\bS2\b2 The value of this parameter is expanded as with P\bPS\bS1\b1 and used as
+ P\bPS\bS2\b2 The value of this parameter is expanded as with P\bPS\bS1\b1 and used as
the secondary prompt string. The default is ``>\b> ''.
P\bPS\bS3\b3 The value of this parameter is used as the prompt for the s\bse\bel\ble\bec\bct\bt
command (see S\bSH\bHE\bEL\bLL\bL G\bGR\bRA\bAM\bMM\bMA\bAR\bR above).
- P\bPS\bS4\b4 The value of this parameter is expanded as with P\bPS\bS1\b1 and the
- value is printed before each command b\bba\bas\bsh\bh displays during an
- execution trace. The first character of P\bPS\bS4\b4 is replicated mul-
- tiple times, as necessary, to indicate multiple levels of indi-
+ P\bPS\bS4\b4 The value of this parameter is expanded as with P\bPS\bS1\b1 and the
+ value is printed before each command b\bba\bas\bsh\bh displays during an
+ execution trace. The first character of P\bPS\bS4\b4 is replicated mul-
+ tiple times, as necessary, to indicate multiple levels of indi-
rection. The default is ``+\b+ ''.
S\bSH\bHE\bEL\bLL\bL The full pathname to the shell is kept in this environment vari-
- able. If it is not set when the shell starts, b\bba\bas\bsh\bh assigns to
+ able. If it is not set when the shell starts, b\bba\bas\bsh\bh assigns to
it the full pathname of the current user's login shell.
T\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT
- The value of this parameter is used as a format string specify-
- ing how the timing information for pipelines prefixed with the
- t\bti\bim\bme\be reserved word should be displayed. The %\b% character intro-
- duces an escape sequence that is expanded to a time value or
- other information. The escape sequences and their meanings are
+ The value of this parameter is used as a format string specify-
+ ing how the timing information for pipelines prefixed with the
+ t\bti\bim\bme\be reserved word should be displayed. The %\b% character intro-
+ duces an escape sequence that is expanded to a time value or
+ other information. The escape sequences and their meanings are
as follows; the braces denote optional portions.
%\b%%\b% A literal %\b%.
%\b%[\b[_\bp]\b][\b[l\bl]\b]R\bR The elapsed time in seconds.
%\b%[\b[_\bp]\b][\b[l\bl]\b]S\bS The number of CPU seconds spent in system mode.
%\b%P\bP The CPU percentage, computed as (%U + %S) / %R.
- The optional _\bp is a digit specifying the _\bp_\br_\be_\bc_\bi_\bs_\bi_\bo_\bn, the number
+ The optional _\bp is a digit specifying the _\bp_\br_\be_\bc_\bi_\bs_\bi_\bo_\bn, the number
of fractional digits after a decimal point. A value of 0 causes
no decimal point or fraction to be output. At most three places
- after the decimal point may be specified; values of _\bp greater
- than 3 are changed to 3. If _\bp is not specified, the value 3 is
+ after the decimal point may be specified; values of _\bp greater
+ than 3 are changed to 3. If _\bp is not specified, the value 3 is
used.
- The optional l\bl specifies a longer format, including minutes, of
- the form _\bM_\bMm_\bS_\bS._\bF_\bFs. The value of _\bp determines whether or not
+ The optional l\bl specifies a longer format, including minutes, of
+ the form _\bM_\bMm_\bS_\bS._\bF_\bFs. The value of _\bp determines whether or not
the fraction is included.
- If this variable is not set, b\bba\bas\bsh\bh acts as if it had the value
- $\b$'\b'\\b\n\bnr\bre\bea\bal\bl\\b\t\bt%\b%3\b3l\blR\bR\\b\n\bnu\bus\bse\ber\br\\b\t\bt%\b%3\b3l\blU\bU\\b\n\bns\bsy\bys\bs%\b%3\b3l\blS\bS'\b'. If the value is null, no
- timing information is displayed. A trailing newline is added
+ If this variable is not set, b\bba\bas\bsh\bh acts as if it had the value
+ $\b$'\b'\\b\n\bnr\bre\bea\bal\bl\\b\t\bt%\b%3\b3l\blR\bR\\b\n\bnu\bus\bse\ber\br\\b\t\bt%\b%3\b3l\blU\bU\\b\n\bns\bsy\bys\bs%\b%3\b3l\blS\bS'\b'. If the value is null, no
+ timing information is displayed. A trailing newline is added
when the format string is displayed.
- T\bTM\bMO\bOU\bUT\bT If set to a value greater than zero, T\bTM\bMO\bOU\bUT\bT is treated as the
+ T\bTM\bMO\bOU\bUT\bT If set to a value greater than zero, T\bTM\bMO\bOU\bUT\bT is treated as the
default timeout for the r\bre\bea\bad\bd builtin. The s\bse\bel\ble\bec\bct\bt command termi-
nates if input does not arrive after T\bTM\bMO\bOU\bUT\bT seconds when input is
- coming from a terminal. In an interactive shell, the value is
- interpreted as the number of seconds to wait for input after
- issuing the primary prompt. B\bBa\bas\bsh\bh terminates after waiting for
+ coming from a terminal. In an interactive shell, the value is
+ interpreted as the number of seconds to wait for input after
+ issuing the primary prompt. B\bBa\bas\bsh\bh terminates after waiting for
that number of seconds if input does not arrive.
- T\bTM\bMP\bPD\bDI\bIR\bR If set, b\bba\bas\bsh\bh uses its value as the name of a directory in which
+ T\bTM\bMP\bPD\bDI\bIR\bR If set, b\bba\bas\bsh\bh uses its value as the name of a directory in which
b\bba\bas\bsh\bh creates temporary files for the shell's use.
a\bau\but\bto\bo_\b_r\bre\bes\bsu\bum\bme\be
This variable controls how the shell interacts with the user and
- job control. If this variable is set, single word simple com-
+ job control. If this variable is set, single word simple com-
mands without redirections are treated as candidates for resump-
tion of an existing stopped job. There is no ambiguity allowed;
- if there is more than one job beginning with the string typed,
- the job most recently accessed is selected. The _\bn_\ba_\bm_\be of a
- stopped job, in this context, is the command line used to start
- it. If set to the value _\be_\bx_\ba_\bc_\bt, the string supplied must match
- the name of a stopped job exactly; if set to _\bs_\bu_\bb_\bs_\bt_\br_\bi_\bn_\bg, the
- string supplied needs to match a substring of the name of a
- stopped job. The _\bs_\bu_\bb_\bs_\bt_\br_\bi_\bn_\bg value provides functionality analo-
- gous to the %\b%?\b? job identifier (see J\bJO\bOB\bB C\bCO\bON\bNT\bTR\bRO\bOL\bL below). If set
- to any other value, the supplied string must be a prefix of a
+ if there is more than one job beginning with the string typed,
+ the job most recently accessed is selected. The _\bn_\ba_\bm_\be of a
+ stopped job, in this context, is the command line used to start
+ it. If set to the value _\be_\bx_\ba_\bc_\bt, the string supplied must match
+ the name of a stopped job exactly; if set to _\bs_\bu_\bb_\bs_\bt_\br_\bi_\bn_\bg, the
+ string supplied needs to match a substring of the name of a
+ stopped job. The _\bs_\bu_\bb_\bs_\bt_\br_\bi_\bn_\bg value provides functionality analo-
+ gous to the %\b%?\b? job identifier (see J\bJO\bOB\bB C\bCO\bON\bNT\bTR\bRO\bOL\bL below). If set
+ to any other value, the supplied string must be a prefix of a
stopped job's name; this provides functionality analogous to the
%\b%_\bs_\bt_\br_\bi_\bn_\bg job identifier.
h\bhi\bis\bst\btc\bch\bha\bar\brs\bs
- The two or three characters which control history expansion and
+ The two or three characters which control history expansion and
tokenization (see H\bHI\bIS\bST\bTO\bOR\bRY\bY E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN below). The first character
- is the _\bh_\bi_\bs_\bt_\bo_\br_\by _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn character, the character which signals
- the start of a history expansion, normally `!\b!'. The second
- character is the _\bq_\bu_\bi_\bc_\bk _\bs_\bu_\bb_\bs_\bt_\bi_\bt_\bu_\bt_\bi_\bo_\bn character, which is used as
- shorthand for re-running the previous command entered, substi-
- tuting one string for another in the command. The default is
- `^\b^'. The optional third character is the character which indi-
- cates that the remainder of the line is a comment when found as
- the first character of a word, normally `#\b#'. The history com-
+ is the _\bh_\bi_\bs_\bt_\bo_\br_\by _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn character, the character which signals
+ the start of a history expansion, normally `!\b!'. The second
+ character is the _\bq_\bu_\bi_\bc_\bk _\bs_\bu_\bb_\bs_\bt_\bi_\bt_\bu_\bt_\bi_\bo_\bn character, which is used as
+ shorthand for re-running the previous command entered, substi-
+ tuting one string for another in the command. The default is
+ `^\b^'. The optional third character is the character which indi-
+ cates that the remainder of the line is a comment when found as
+ the first character of a word, normally `#\b#'. The history com-
ment character causes history substitution to be skipped for the
- remaining words on the line. It does not necessarily cause the
+ remaining words on the line. It does not necessarily cause the
shell parser to treat the rest of the line as a comment.
A\bAr\brr\bra\bay\bys\bs
- B\bBa\bas\bsh\bh provides one-dimensional indexed and associative array variables.
- Any variable may be used as an indexed array; the d\bde\bec\bcl\bla\bar\bre\be builtin will
- explicitly declare an array. There is no maximum limit on the size of
- an array, nor any requirement that members be indexed or assigned con-
- tiguously. Indexed arrays are referenced using integers (including
- arithmetic expressions) and are zero-based; associative arrays are
+ B\bBa\bas\bsh\bh provides one-dimensional indexed and associative array variables.
+ Any variable may be used as an indexed array; the d\bde\bec\bcl\bla\bar\bre\be builtin will
+ explicitly declare an array. There is no maximum limit on the size of
+ an array, nor any requirement that members be indexed or assigned con-
+ tiguously. Indexed arrays are referenced using integers (including
+ arithmetic expressions) and are zero-based; associative arrays are
referenced using arbitrary strings.
- An indexed array is created automatically if any variable is assigned
+ An indexed array is created automatically if any variable is assigned
to using the syntax _\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]=_\bv_\ba_\bl_\bu_\be. The _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is treated as
- an arithmetic expression that must evaluate to a number. If _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt
- evaluates to a number less than zero, it is used as an offset from one
- greater than the array's maximum index (so a subcript of -1 refers to
- the last element of the array). To explicitly declare an indexed
+ an arithmetic expression that must evaluate to a number. If _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt
+ evaluates to a number less than zero, it is used as an offset from one
+ greater than the array's maximum index (so a subcript of -1 refers to
+ the last element of the array). To explicitly declare an indexed
array, use d\bde\bec\bcl\bla\bar\bre\be -\b-a\ba _\bn_\ba_\bm_\be (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). d\bde\bec\bcl\bla\bar\bre\be
-\b-a\ba _\bn_\ba_\bm_\be[\b[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]\b] is also accepted; the _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is ignored.
Associative arrays are created using d\bde\bec\bcl\bla\bar\bre\be -\b-A\bA _\bn_\ba_\bm_\be.
Attributes may be specified for an array variable using the d\bde\bec\bcl\bla\bar\bre\be and
- r\bre\bea\bad\bdo\bon\bnl\bly\by builtins. Each attribute applies to all members of an array.
+ r\bre\bea\bad\bdo\bon\bnl\bly\by builtins. Each attribute applies to all members of an array.
- Arrays are assigned to using compound assignments of the form
- _\bn_\ba_\bm_\be=(\b(value_\b1 ... value_\bn)\b), where each _\bv_\ba_\bl_\bu_\be is of the form [_\bs_\bu_\bb_\b-
- _\bs_\bc_\br_\bi_\bp_\bt]=_\bs_\bt_\br_\bi_\bn_\bg. Indexed array assignments do not require the bracket
- and subscript. When assigning to indexed arrays, if the optional
- brackets and subscript are supplied, that index is assigned to; other-
+ Arrays are assigned to using compound assignments of the form
+ _\bn_\ba_\bm_\be=(\b(value_\b1 ... value_\bn)\b), where each _\bv_\ba_\bl_\bu_\be is of the form [_\bs_\bu_\bb_\b-
+ _\bs_\bc_\br_\bi_\bp_\bt]=_\bs_\bt_\br_\bi_\bn_\bg. Indexed array assignments do not require the bracket
+ and subscript. When assigning to indexed arrays, if the optional
+ brackets and subscript are supplied, that index is assigned to; other-
wise the index of the element assigned is the last index assigned to by
the statement plus one. Indexing starts at zero.
When assigning to an associative array, the subscript is required.
- This syntax is also accepted by the d\bde\bec\bcl\bla\bar\bre\be builtin. Individual array
- elements may be assigned to using the _\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]=_\bv_\ba_\bl_\bu_\be syntax
+ This syntax is also accepted by the d\bde\bec\bcl\bla\bar\bre\be builtin. Individual array
+ elements may be assigned to using the _\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]=_\bv_\ba_\bl_\bu_\be syntax
introduced above.
- Any element of an array may be referenced using ${_\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]}.
+ Any element of an array may be referenced using ${_\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]}.
The braces are required to avoid conflicts with pathname expansion. If
- _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is @\b@ or *\b*, the word expands to all members of _\bn_\ba_\bm_\be. These
- subscripts differ only when the word appears within double quotes. If
+ _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is @\b@ or *\b*, the word expands to all members of _\bn_\ba_\bm_\be. These
+ subscripts differ only when the word appears within double quotes. If
the word is double-quoted, ${_\bn_\ba_\bm_\be[*]} expands to a single word with the
- value of each array member separated by the first character of the I\bIF\bFS\bS
+ value of each array member separated by the first character of the I\bIF\bFS\bS
special variable, and ${_\bn_\ba_\bm_\be[@]} expands each element of _\bn_\ba_\bm_\be to a sep-
- arate word. When there are no array members, ${_\bn_\ba_\bm_\be[@]} expands to
- nothing. If the double-quoted expansion occurs within a word, the
- expansion of the first parameter is joined with the beginning part of
- the original word, and the expansion of the last parameter is joined
- with the last part of the original word. This is analogous to the
- expansion of the special parameters *\b* and @\b@ (see S\bSp\bpe\bec\bci\bia\bal\bl P\bPa\bar\bra\bam\bme\bet\bte\ber\brs\bs
- above). ${#_\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]} expands to the length of ${_\bn_\ba_\bm_\be[_\bs_\bu_\bb_\b-
- _\bs_\bc_\br_\bi_\bp_\bt]}. If _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is *\b* or @\b@, the expansion is the number of ele-
- ments in the array. Referencing an array variable without a subscript
+ arate word. When there are no array members, ${_\bn_\ba_\bm_\be[@]} expands to
+ nothing. If the double-quoted expansion occurs within a word, the
+ expansion of the first parameter is joined with the beginning part of
+ the original word, and the expansion of the last parameter is joined
+ with the last part of the original word. This is analogous to the
+ expansion of the special parameters *\b* and @\b@ (see S\bSp\bpe\bec\bci\bia\bal\bl P\bPa\bar\bra\bam\bme\bet\bte\ber\brs\bs
+ above). ${#_\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]} expands to the length of ${_\bn_\ba_\bm_\be[_\bs_\bu_\bb_\b-
+ _\bs_\bc_\br_\bi_\bp_\bt]}. If _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is *\b* or @\b@, the expansion is the number of ele-
+ ments in the array. Referencing an array variable without a subscript
is equivalent to referencing the array with a subscript of 0.
- An array variable is considered set if a subscript has been assigned a
+ An array variable is considered set if a subscript has been assigned a
value. The null string is a valid value.
- The u\bun\bns\bse\bet\bt builtin is used to destroy arrays. u\bun\bns\bse\bet\bt _\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]
- destroys the array element at index _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt. Care must be taken to
- avoid unwanted side effects caused by pathname expansion. u\bun\bns\bse\bet\bt _\bn_\ba_\bm_\be,
- where _\bn_\ba_\bm_\be is an array, or u\bun\bns\bse\bet\bt _\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt], where _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is *\b*
+ The u\bun\bns\bse\bet\bt builtin is used to destroy arrays. u\bun\bns\bse\bet\bt _\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt]
+ destroys the array element at index _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt. Care must be taken to
+ avoid unwanted side effects caused by pathname expansion. u\bun\bns\bse\bet\bt _\bn_\ba_\bm_\be,
+ where _\bn_\ba_\bm_\be is an array, or u\bun\bns\bse\bet\bt _\bn_\ba_\bm_\be[_\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt], where _\bs_\bu_\bb_\bs_\bc_\br_\bi_\bp_\bt is *\b*
or @\b@, removes the entire array.
- The d\bde\bec\bcl\bla\bar\bre\be, l\blo\boc\bca\bal\bl, and r\bre\bea\bad\bdo\bon\bnl\bly\by builtins each accept a -\b-a\ba option to
- specify an indexed array and a -\b-A\bA option to specify an associative
- array. The r\bre\bea\bad\bd builtin accepts a -\b-a\ba option to assign a list of words
+ The d\bde\bec\bcl\bla\bar\bre\be, l\blo\boc\bca\bal\bl, and r\bre\bea\bad\bdo\bon\bnl\bly\by builtins each accept a -\b-a\ba option to
+ specify an indexed array and a -\b-A\bA option to specify an associative
+ array. The r\bre\bea\bad\bd builtin accepts a -\b-a\ba option to assign a list of words
read from the standard input to an array. The s\bse\bet\bt and d\bde\bec\bcl\bla\bar\bre\be builtins
- display array values in a way that allows them to be reused as assign-
+ display array values in a way that allows them to be reused as assign-
ments.
E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN
Expansion is performed on the command line after it has been split into
- words. There are seven kinds of expansion performed: _\bb_\br_\ba_\bc_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn,
- _\bt_\bi_\bl_\bd_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn, _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br _\ba_\bn_\bd _\bv_\ba_\br_\bi_\ba_\bb_\bl_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn, _\bc_\bo_\bm_\bm_\ba_\bn_\bd _\bs_\bu_\bb_\bs_\bt_\bi_\bt_\bu_\b-
+ words. There are seven kinds of expansion performed: _\bb_\br_\ba_\bc_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn,
+ _\bt_\bi_\bl_\bd_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn, _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br _\ba_\bn_\bd _\bv_\ba_\br_\bi_\ba_\bb_\bl_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn, _\bc_\bo_\bm_\bm_\ba_\bn_\bd _\bs_\bu_\bb_\bs_\bt_\bi_\bt_\bu_\b-
_\bt_\bi_\bo_\bn, _\ba_\br_\bi_\bt_\bh_\bm_\be_\bt_\bi_\bc _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn, _\bw_\bo_\br_\bd _\bs_\bp_\bl_\bi_\bt_\bt_\bi_\bn_\bg, and _\bp_\ba_\bt_\bh_\bn_\ba_\bm_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn.
- The order of expansions is: brace expansion, tilde expansion, parame-
- ter, variable and arithmetic expansion and command substitution (done
+ The order of expansions is: brace expansion, tilde expansion, parame-
+ ter, variable and arithmetic expansion and command substitution (done
in a left-to-right fashion), word splitting, and pathname expansion.
On systems that can support it, there is an additional expansion avail-
able: _\bp_\br_\bo_\bc_\be_\bs_\bs _\bs_\bu_\bb_\bs_\bt_\bi_\bt_\bu_\bt_\bi_\bo_\bn.
Only brace expansion, word splitting, and pathname expansion can change
- the number of words of the expansion; other expansions expand a single
- word to a single word. The only exceptions to this are the expansions
+ the number of words of the expansion; other expansions expand a single
+ word to a single word. The only exceptions to this are the expansions
of "$\b$@\b@" and "$\b${\b{_\bn_\ba_\bm_\be[\b[@\b@]\b]}\b}" as explained above (see P\bPA\bAR\bRA\bAM\bME\bET\bTE\bER\bRS\bS).
B\bBr\bra\bac\bce\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn
_\bB_\br_\ba_\bc_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn is a mechanism by which arbitrary strings may be gener-
- ated. This mechanism is similar to _\bp_\ba_\bt_\bh_\bn_\ba_\bm_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn, but the file-
+ ated. This mechanism is similar to _\bp_\ba_\bt_\bh_\bn_\ba_\bm_\be _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn, but the file-
names generated need not exist. Patterns to be brace expanded take the
form of an optional _\bp_\br_\be_\ba_\bm_\bb_\bl_\be, followed by either a series of comma-sep-
- arated strings or a sequence expression between a pair of braces, fol-
- lowed by an optional _\bp_\bo_\bs_\bt_\bs_\bc_\br_\bi_\bp_\bt. The preamble is prefixed to each
+ arated strings or a sequence expression between a pair of braces, fol-
+ lowed by an optional _\bp_\bo_\bs_\bt_\bs_\bc_\br_\bi_\bp_\bt. The preamble is prefixed to each
string contained within the braces, and the postscript is then appended
to each resulting string, expanding left to right.
- Brace expansions may be nested. The results of each expanded string
- are not sorted; left to right order is preserved. For example,
+ Brace expansions may be nested. The results of each expanded string
+ are not sorted; left to right order is preserved. For example,
a{\b{d,c,b}\b}e expands into `ade ace abe'.
- A sequence expression takes the form {\b{_\bx.\b..\b._\by[\b[.\b..\b._\bi_\bn_\bc_\br]\b]}\b}, where _\bx and _\by are
- either integers or single characters, and _\bi_\bn_\bc_\br, an optional increment,
- is an integer. When integers are supplied, the expression expands to
- each number between _\bx and _\by, inclusive. Supplied integers may be pre-
- fixed with _\b0 to force each term to have the same width. When either _\bx
- or _\by begins with a zero, the shell attempts to force all generated
- terms to contain the same number of digits, zero-padding where neces-
- sary. When characters are supplied, the expression expands to each
+ A sequence expression takes the form {\b{_\bx.\b..\b._\by[\b[.\b..\b._\bi_\bn_\bc_\br]\b]}\b}, where _\bx and _\by are
+ either integers or single characters, and _\bi_\bn_\bc_\br, an optional increment,
+ is an integer. When integers are supplied, the expression expands to
+ each number between _\bx and _\by, inclusive. Supplied integers may be pre-
+ fixed with _\b0 to force each term to have the same width. When either _\bx
+ or _\by begins with a zero, the shell attempts to force all generated
+ terms to contain the same number of digits, zero-padding where neces-
+ sary. When characters are supplied, the expression expands to each
character lexicographically between _\bx and _\by, inclusive. Note that both
- _\bx and _\by must be of the same type. When the increment is supplied, it
- is used as the difference between each term. The default increment is
+ _\bx and _\by must be of the same type. When the increment is supplied, it
+ is used as the difference between each term. The default increment is
1 or -1 as appropriate.
Brace expansion is performed before any other expansions, and any char-
- acters special to other expansions are preserved in the result. It is
- strictly textual. B\bBa\bas\bsh\bh does not apply any syntactic interpretation to
+ acters special to other expansions are preserved in the result. It is
+ strictly textual. B\bBa\bas\bsh\bh does not apply any syntactic interpretation to
the context of the expansion or the text between the braces.
- A correctly-formed brace expansion must contain unquoted opening and
- closing braces, and at least one unquoted comma or a valid sequence
- expression. Any incorrectly formed brace expansion is left unchanged.
+ A correctly-formed brace expansion must contain unquoted opening and
+ closing braces, and at least one unquoted comma or a valid sequence
+ expression. Any incorrectly formed brace expansion is left unchanged.
A {\b{ or ,\b, may be quoted with a backslash to prevent its being considered
- part of a brace expression. To avoid conflicts with parameter expan-
+ part of a brace expression. To avoid conflicts with parameter expan-
sion, the string $\b${\b{ is not considered eligible for brace expansion.
This construct is typically used as shorthand when the common prefix of
or
chown root /usr/{ucb/{ex,edit},lib/{ex?.?*,how_ex}}
- Brace expansion introduces a slight incompatibility with historical
- versions of s\bsh\bh. s\bsh\bh does not treat opening or closing braces specially
- when they appear as part of a word, and preserves them in the output.
- B\bBa\bas\bsh\bh removes braces from words as a consequence of brace expansion.
- For example, a word entered to s\bsh\bh as _\bf_\bi_\bl_\be_\b{_\b1_\b,_\b2_\b} appears identically in
- the output. The same word is output as _\bf_\bi_\bl_\be_\b1 _\bf_\bi_\bl_\be_\b2 after expansion by
- b\bba\bas\bsh\bh. If strict compatibility with s\bsh\bh is desired, start b\bba\bas\bsh\bh with the
+ Brace expansion introduces a slight incompatibility with historical
+ versions of s\bsh\bh. s\bsh\bh does not treat opening or closing braces specially
+ when they appear as part of a word, and preserves them in the output.
+ B\bBa\bas\bsh\bh removes braces from words as a consequence of brace expansion.
+ For example, a word entered to s\bsh\bh as _\bf_\bi_\bl_\be_\b{_\b1_\b,_\b2_\b} appears identically in
+ the output. The same word is output as _\bf_\bi_\bl_\be_\b1 _\bf_\bi_\bl_\be_\b2 after expansion by
+ b\bba\bas\bsh\bh. If strict compatibility with s\bsh\bh is desired, start b\bba\bas\bsh\bh with the
+\b+B\bB option or disable brace expansion with the +\b+B\bB option to the s\bse\bet\bt com-
mand (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
T\bTi\bil\bld\bde\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn
- If a word begins with an unquoted tilde character (`~\b~'), all of the
- characters preceding the first unquoted slash (or all characters, if
- there is no unquoted slash) are considered a _\bt_\bi_\bl_\bd_\be_\b-_\bp_\br_\be_\bf_\bi_\bx. If none of
- the characters in the tilde-prefix are quoted, the characters in the
- tilde-prefix following the tilde are treated as a possible _\bl_\bo_\bg_\bi_\bn _\bn_\ba_\bm_\be.
- If this login name is the null string, the tilde is replaced with the
- value of the shell parameter H\bHO\bOM\bME\bE. If H\bHO\bOM\bME\bE is unset, the home direc-
- tory of the user executing the shell is substituted instead. Other-
- wise, the tilde-prefix is replaced with the home directory associated
+ If a word begins with an unquoted tilde character (`~\b~'), all of the
+ characters preceding the first unquoted slash (or all characters, if
+ there is no unquoted slash) are considered a _\bt_\bi_\bl_\bd_\be_\b-_\bp_\br_\be_\bf_\bi_\bx. If none of
+ the characters in the tilde-prefix are quoted, the characters in the
+ tilde-prefix following the tilde are treated as a possible _\bl_\bo_\bg_\bi_\bn _\bn_\ba_\bm_\be.
+ If this login name is the null string, the tilde is replaced with the
+ value of the shell parameter H\bHO\bOM\bME\bE. If H\bHO\bOM\bME\bE is unset, the home direc-
+ tory of the user executing the shell is substituted instead. Other-
+ wise, the tilde-prefix is replaced with the home directory associated
with the specified login name.
- If the tilde-prefix is a `~+', the value of the shell variable P\bPW\bWD\bD
+ If the tilde-prefix is a `~+', the value of the shell variable P\bPW\bWD\bD
replaces the tilde-prefix. If the tilde-prefix is a `~-', the value of
- the shell variable O\bOL\bLD\bDP\bPW\bWD\bD, if it is set, is substituted. If the char-
- acters following the tilde in the tilde-prefix consist of a number _\bN,
- optionally prefixed by a `+' or a `-', the tilde-prefix is replaced
+ the shell variable O\bOL\bLD\bDP\bPW\bWD\bD, if it is set, is substituted. If the char-
+ acters following the tilde in the tilde-prefix consist of a number _\bN,
+ optionally prefixed by a `+' or a `-', the tilde-prefix is replaced
with the corresponding element from the directory stack, as it would be
displayed by the d\bdi\bir\brs\bs builtin invoked with the tilde-prefix as an argu-
- ment. If the characters following the tilde in the tilde-prefix con-
+ ment. If the characters following the tilde in the tilde-prefix con-
sist of a number without a leading `+' or `-', `+' is assumed.
If the login name is invalid, or the tilde expansion fails, the word is
Each variable assignment is checked for unquoted tilde-prefixes immedi-
ately following a :\b: or the first =\b=. In these cases, tilde expansion is
- also performed. Consequently, one may use file names with tildes in
- assignments to P\bPA\bAT\bTH\bH, M\bMA\bAI\bIL\bLP\bPA\bAT\bTH\bH, and C\bCD\bDP\bPA\bAT\bTH\bH, and the shell assigns the
+ also performed. Consequently, one may use file names with tildes in
+ assignments to P\bPA\bAT\bTH\bH, M\bMA\bAI\bIL\bLP\bPA\bAT\bTH\bH, and C\bCD\bDP\bPA\bAT\bTH\bH, and the shell assigns the
expanded value.
P\bPa\bar\bra\bam\bme\bet\bte\ber\br E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn
The `$\b$' character introduces parameter expansion, command substitution,
- or arithmetic expansion. The parameter name or symbol to be expanded
- may be enclosed in braces, which are optional but serve to protect the
- variable to be expanded from characters immediately following it which
+ or arithmetic expansion. The parameter name or symbol to be expanded
+ may be enclosed in braces, which are optional but serve to protect the
+ variable to be expanded from characters immediately following it which
could be interpreted as part of the name.
- When braces are used, the matching ending brace is the first `}\b}' not
- escaped by a backslash or within a quoted string, and not within an
+ When braces are used, the matching ending brace is the first `}\b}' not
+ escaped by a backslash or within a quoted string, and not within an
embedded arithmetic expansion, command substitution, or parameter
expansion.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br}
- The value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is substituted. The braces are required
- when _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is a positional parameter with more than one
+ The value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is substituted. The braces are required
+ when _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is a positional parameter with more than one
digit, or when _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is followed by a character which is not
to be interpreted as part of its name.
- If the first character of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an exclamation point (!\b!), a
- level of variable indirection is introduced. B\bBa\bas\bsh\bh uses the value of
+ If the first character of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an exclamation point (!\b!), a
+ level of variable indirection is introduced. B\bBa\bas\bsh\bh uses the value of
the variable formed from the rest of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br as the name of the vari-
able; this variable is then expanded and that value is used in the rest
- of the substitution, rather than the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br itself. This
- is known as _\bi_\bn_\bd_\bi_\br_\be_\bc_\bt _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn. The exceptions to this are the expan-
- sions of ${!\b!\\b\f\bfP\bPf\bfI\bIp\bpr\bre\bef\bfi\bix\bx*\b*} and ${!\b!_\bn_\ba_\bm_\be[_\b@]} described below. The excla-
- mation point must immediately follow the left brace in order to intro-
+ of the substitution, rather than the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br itself. This
+ is known as _\bi_\bn_\bd_\bi_\br_\be_\bc_\bt _\be_\bx_\bp_\ba_\bn_\bs_\bi_\bo_\bn. The exceptions to this are the expan-
+ sions of ${!\b!\\b\f\bfP\bPf\bfI\bIp\bpr\bre\bef\bfi\bix\bx*\b*} and ${!\b!_\bn_\ba_\bm_\be[_\b@]} described below. The excla-
+ mation point must immediately follow the left brace in order to intro-
duce indirection.
In each of the cases below, _\bw_\bo_\br_\bd is subject to tilde expansion, parame-
ter expansion, command substitution, and arithmetic expansion.
- When not performing substring expansion, using the forms documented
- below, b\bba\bas\bsh\bh tests for a parameter that is unset or null. Omitting the
+ When not performing substring expansion, using the forms documented
+ below, b\bba\bas\bsh\bh tests for a parameter that is unset or null. Omitting the
colon results in a test only for a parameter that is unset.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br:\b:-\b-_\bw_\bo_\br_\bd}
- U\bUs\bse\be D\bDe\bef\bfa\bau\bul\blt\bt V\bVa\bal\blu\bue\bes\bs. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is unset or null, the expan-
- sion of _\bw_\bo_\br_\bd is substituted. Otherwise, the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br
+ U\bUs\bse\be D\bDe\bef\bfa\bau\bul\blt\bt V\bVa\bal\blu\bue\bes\bs. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is unset or null, the expan-
+ sion of _\bw_\bo_\br_\bd is substituted. Otherwise, the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br
is substituted.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br:\b:=\b=_\bw_\bo_\br_\bd}
- A\bAs\bss\bsi\big\bgn\bn D\bDe\bef\bfa\bau\bul\blt\bt V\bVa\bal\blu\bue\bes\bs. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is unset or null, the
+ A\bAs\bss\bsi\big\bgn\bn D\bDe\bef\bfa\bau\bul\blt\bt V\bVa\bal\blu\bue\bes\bs. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is unset or null, the
expansion of _\bw_\bo_\br_\bd is assigned to _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br. The value of _\bp_\ba_\br_\ba_\bm_\b-
- _\be_\bt_\be_\br is then substituted. Positional parameters and special
+ _\be_\bt_\be_\br is then substituted. Positional parameters and special
parameters may not be assigned to in this way.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br:\b:?\b?_\bw_\bo_\br_\bd}
- D\bDi\bis\bsp\bpl\bla\bay\by E\bEr\brr\bro\bor\br i\bif\bf N\bNu\bul\bll\bl o\bor\br U\bUn\bns\bse\bet\bt. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is null or unset,
- the expansion of _\bw_\bo_\br_\bd (or a message to that effect if _\bw_\bo_\br_\bd is
- not present) is written to the standard error and the shell, if
+ D\bDi\bis\bsp\bpl\bla\bay\by E\bEr\brr\bro\bor\br i\bif\bf N\bNu\bul\bll\bl o\bor\br U\bUn\bns\bse\bet\bt. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is null or unset,
+ the expansion of _\bw_\bo_\br_\bd (or a message to that effect if _\bw_\bo_\br_\bd is
+ not present) is written to the standard error and the shell, if
it is not interactive, exits. Otherwise, the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br
is substituted.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br:\b:+\b+_\bw_\bo_\br_\bd}
- U\bUs\bse\be A\bAl\blt\bte\ber\brn\bna\bat\bte\be V\bVa\bal\blu\bue\be. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is null or unset, nothing is
+ U\bUs\bse\be A\bAl\blt\bte\ber\brn\bna\bat\bte\be V\bVa\bal\blu\bue\be. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is null or unset, nothing is
substituted, otherwise the expansion of _\bw_\bo_\br_\bd is substituted.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br:\b:_\bo_\bf_\bf_\bs_\be_\bt}
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br:\b:_\bo_\bf_\bf_\bs_\be_\bt:\b:_\bl_\be_\bn_\bg_\bt_\bh}
- S\bSu\bub\bbs\bst\btr\bri\bin\bng\bg E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn. Expands to up to _\bl_\be_\bn_\bg_\bt_\bh characters of
- _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br starting at the character specified by _\bo_\bf_\bf_\bs_\be_\bt. If
- _\bl_\be_\bn_\bg_\bt_\bh is omitted, expands to the substring of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br start-
+ S\bSu\bub\bbs\bst\btr\bri\bin\bng\bg E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn. Expands to up to _\bl_\be_\bn_\bg_\bt_\bh characters of
+ _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br starting at the character specified by _\bo_\bf_\bf_\bs_\be_\bt. If
+ _\bl_\be_\bn_\bg_\bt_\bh is omitted, expands to the substring of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br start-
ing at the character specified by _\bo_\bf_\bf_\bs_\be_\bt. _\bl_\be_\bn_\bg_\bt_\bh and _\bo_\bf_\bf_\bs_\be_\bt are
- arithmetic expressions (see A\bAR\bRI\bIT\bTH\bHM\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN below). If
- _\bo_\bf_\bf_\bs_\be_\bt evaluates to a number less than zero, the value is used
- as an offset from the end of the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br. If _\bl_\be_\bn_\bg_\bt_\bh
+ arithmetic expressions (see A\bAR\bRI\bIT\bTH\bHM\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN below). If
+ _\bo_\bf_\bf_\bs_\be_\bt evaluates to a number less than zero, the value is used
+ as an offset from the end of the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br. If _\bl_\be_\bn_\bg_\bt_\bh
evaluates to a number less than zero, and _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is not @\b@ and
- not an indexed or associative array, it is interpreted as an
+ not an indexed or associative array, it is interpreted as an
offset from the end of the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br rather than a num-
- ber of characters, and the expansion is the characters between
- the two offsets. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@, the result is _\bl_\be_\bn_\bg_\bt_\bh posi-
- tional parameters beginning at _\bo_\bf_\bf_\bs_\be_\bt. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an
- indexed array name subscripted by @ or *, the result is the
+ ber of characters, and the expansion is the characters between
+ the two offsets. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@, the result is _\bl_\be_\bn_\bg_\bt_\bh posi-
+ tional parameters beginning at _\bo_\bf_\bf_\bs_\be_\bt. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an
+ indexed array name subscripted by @ or *, the result is the
_\bl_\be_\bn_\bg_\bt_\bh members of the array beginning with ${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br[_\bo_\bf_\bf_\bs_\be_\bt]}.
A negative _\bo_\bf_\bf_\bs_\be_\bt is taken relative to one greater than the max-
- imum index of the specified array. Substring expansion applied
+ imum index of the specified array. Substring expansion applied
to an associative array produces undefined results. Note that a
negative offset must be separated from the colon by at least one
- space to avoid being confused with the :- expansion. Substring
- indexing is zero-based unless the positional parameters are
- used, in which case the indexing starts at 1 by default. If
- _\bo_\bf_\bf_\bs_\be_\bt is 0, and the positional parameters are used, $\b$0\b0 is pre-
+ space to avoid being confused with the :- expansion. Substring
+ indexing is zero-based unless the positional parameters are
+ used, in which case the indexing starts at 1 by default. If
+ _\bo_\bf_\bf_\bs_\be_\bt is 0, and the positional parameters are used, $\b$0\b0 is pre-
fixed to the list.
${!\b!_\bp_\br_\be_\bf_\bi_\bx*\b*}
${!\b!_\bp_\br_\be_\bf_\bi_\bx@\b@}
- N\bNa\bam\bme\bes\bs m\bma\bat\btc\bch\bhi\bin\bng\bg p\bpr\bre\bef\bfi\bix\bx. Expands to the names of variables whose
+ N\bNa\bam\bme\bes\bs m\bma\bat\btc\bch\bhi\bin\bng\bg p\bpr\bre\bef\bfi\bix\bx. Expands to the names of variables whose
names begin with _\bp_\br_\be_\bf_\bi_\bx, separated by the first character of the
- I\bIF\bFS\bS special variable. When _\b@ is used and the expansion appears
- within double quotes, each variable name expands to a separate
+ I\bIF\bFS\bS special variable. When _\b@ is used and the expansion appears
+ within double quotes, each variable name expands to a separate
word.
${!\b!_\bn_\ba_\bm_\be[_\b@]}
${!\b!_\bn_\ba_\bm_\be[_\b*]}
- L\bLi\bis\bst\bt o\bof\bf a\bar\brr\bra\bay\by k\bke\bey\bys\bs. If _\bn_\ba_\bm_\be is an array variable, expands to
- the list of array indices (keys) assigned in _\bn_\ba_\bm_\be. If _\bn_\ba_\bm_\be is
- not an array, expands to 0 if _\bn_\ba_\bm_\be is set and null otherwise.
- When _\b@ is used and the expansion appears within double quotes,
+ L\bLi\bis\bst\bt o\bof\bf a\bar\brr\bra\bay\by k\bke\bey\bys\bs. If _\bn_\ba_\bm_\be is an array variable, expands to
+ the list of array indices (keys) assigned in _\bn_\ba_\bm_\be. If _\bn_\ba_\bm_\be is
+ not an array, expands to 0 if _\bn_\ba_\bm_\be is set and null otherwise.
+ When _\b@ is used and the expansion appears within double quotes,
each key expands to a separate word.
${#\b#_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br}
- P\bPa\bar\bra\bam\bme\bet\bte\ber\br l\ble\ben\bng\bgt\bth\bh. The length in characters of the value of
- _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is substituted. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is *\b* or @\b@, the value
- substituted is the number of positional parameters. If _\bp_\ba_\br_\ba_\bm_\be_\b-
- _\bt_\be_\br is an array name subscripted by *\b* or @\b@, the value substi-
+ P\bPa\bar\bra\bam\bme\bet\bte\ber\br l\ble\ben\bng\bgt\bth\bh. The length in characters of the value of
+ _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is substituted. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is *\b* or @\b@, the value
+ substituted is the number of positional parameters. If _\bp_\ba_\br_\ba_\bm_\be_\b-
+ _\bt_\be_\br is an array name subscripted by *\b* or @\b@, the value substi-
tuted is the number of elements in the array.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br#\b#_\bw_\bo_\br_\bd}
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br#\b##\b#_\bw_\bo_\br_\bd}
R\bRe\bem\bmo\bov\bve\be m\bma\bat\btc\bch\bhi\bin\bng\bg p\bpr\bre\bef\bfi\bix\bx p\bpa\bat\btt\bte\ber\brn\bn. The _\bw_\bo_\br_\bd is expanded to produce
a pattern just as in pathname expansion. If the pattern matches
- the beginning of the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br, then the result of the
- expansion is the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br with the shortest
- matching pattern (the ``#\b#'' case) or the longest matching pat-
- tern (the ``#\b##\b#'' case) deleted. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@ or *\b*, the
- pattern removal operation is applied to each positional parame-
+ the beginning of the value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br, then the result of the
+ expansion is the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br with the shortest
+ matching pattern (the ``#\b#'' case) or the longest matching pat-
+ tern (the ``#\b##\b#'' case) deleted. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@ or *\b*, the
+ pattern removal operation is applied to each positional parame-
ter in turn, and the expansion is the resultant list. If _\bp_\ba_\br_\ba_\bm_\b-
- _\be_\bt_\be_\br is an array variable subscripted with @\b@ or *\b*, the pattern
- removal operation is applied to each member of the array in
+ _\be_\bt_\be_\br is an array variable subscripted with @\b@ or *\b*, the pattern
+ removal operation is applied to each member of the array in
turn, and the expansion is the resultant list.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br%\b%_\bw_\bo_\br_\bd}
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br%\b%%\b%_\bw_\bo_\br_\bd}
R\bRe\bem\bmo\bov\bve\be m\bma\bat\btc\bch\bhi\bin\bng\bg s\bsu\buf\bff\bfi\bix\bx p\bpa\bat\btt\bte\ber\brn\bn. The _\bw_\bo_\br_\bd is expanded to produce
a pattern just as in pathname expansion. If the pattern matches
- a trailing portion of the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br, then the
- result of the expansion is the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br with
- the shortest matching pattern (the ``%\b%'' case) or the longest
- matching pattern (the ``%\b%%\b%'' case) deleted. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@
- or *\b*, the pattern removal operation is applied to each posi-
- tional parameter in turn, and the expansion is the resultant
- list. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an array variable subscripted with @\b@ or
- *\b*, the pattern removal operation is applied to each member of
+ a trailing portion of the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br, then the
+ result of the expansion is the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br with
+ the shortest matching pattern (the ``%\b%'' case) or the longest
+ matching pattern (the ``%\b%%\b%'' case) deleted. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@
+ or *\b*, the pattern removal operation is applied to each posi-
+ tional parameter in turn, and the expansion is the resultant
+ list. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an array variable subscripted with @\b@ or
+ *\b*, the pattern removal operation is applied to each member of
the array in turn, and the expansion is the resultant list.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br/\b/_\bp_\ba_\bt_\bt_\be_\br_\bn/\b/_\bs_\bt_\br_\bi_\bn_\bg}
P\bPa\bat\btt\bte\ber\brn\bn s\bsu\bub\bbs\bst\bti\bit\btu\but\bti\bio\bon\bn. The _\bp_\ba_\bt_\bt_\be_\br_\bn is expanded to produce a pat-
- tern just as in pathname expansion. _\bP_\ba_\br_\ba_\bm_\be_\bt_\be_\br is expanded and
- the longest match of _\bp_\ba_\bt_\bt_\be_\br_\bn against its value is replaced with
- _\bs_\bt_\br_\bi_\bn_\bg. If _\bp_\ba_\bt_\bt_\be_\br_\bn begins with /\b/, all matches of _\bp_\ba_\bt_\bt_\be_\br_\bn are
- replaced with _\bs_\bt_\br_\bi_\bn_\bg. Normally only the first match is
+ tern just as in pathname expansion. _\bP_\ba_\br_\ba_\bm_\be_\bt_\be_\br is expanded and
+ the longest match of _\bp_\ba_\bt_\bt_\be_\br_\bn against its value is replaced with
+ _\bs_\bt_\br_\bi_\bn_\bg. If _\bp_\ba_\bt_\bt_\be_\br_\bn begins with /\b/, all matches of _\bp_\ba_\bt_\bt_\be_\br_\bn are
+ replaced with _\bs_\bt_\br_\bi_\bn_\bg. Normally only the first match is
replaced. If _\bp_\ba_\bt_\bt_\be_\br_\bn begins with #\b#, it must match at the begin-
ning of the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br. If _\bp_\ba_\bt_\bt_\be_\br_\bn begins with
- %\b%, it must match at the end of the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br.
+ %\b%, it must match at the end of the expanded value of _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br.
If _\bs_\bt_\br_\bi_\bn_\bg is null, matches of _\bp_\ba_\bt_\bt_\be_\br_\bn are deleted and the /\b/ fol-
lowing _\bp_\ba_\bt_\bt_\be_\br_\bn may be omitted. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@ or *\b*, the sub-
- stitution operation is applied to each positional parameter in
- turn, and the expansion is the resultant list. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is
- an array variable subscripted with @\b@ or *\b*, the substitution
- operation is applied to each member of the array in turn, and
+ stitution operation is applied to each positional parameter in
+ turn, and the expansion is the resultant list. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is
+ an array variable subscripted with @\b@ or *\b*, the substitution
+ operation is applied to each member of the array in turn, and
the expansion is the resultant list.
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br^\b^_\bp_\ba_\bt_\bt_\be_\br_\bn}
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br^\b^^\b^_\bp_\ba_\bt_\bt_\be_\br_\bn}
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br,\b,_\bp_\ba_\bt_\bt_\be_\br_\bn}
${_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br,\b,,\b,_\bp_\ba_\bt_\bt_\be_\br_\bn}
- C\bCa\bas\bse\be m\bmo\bod\bdi\bif\bfi\bic\bca\bat\bti\bio\bon\bn. This expansion modifies the case of alpha-
- betic characters in _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br. The _\bp_\ba_\bt_\bt_\be_\br_\bn is expanded to pro-
- duce a pattern just as in pathname expansion. The ^\b^ operator
- converts lowercase letters matching _\bp_\ba_\bt_\bt_\be_\br_\bn to uppercase; the ,\b,
- operator converts matching uppercase letters to lowercase. The
- ^\b^^\b^ and ,\b,,\b, expansions convert each matched character in the
- expanded value; the ^\b^ and ,\b, expansions match and convert only
- the first character in the expanded value. If _\bp_\ba_\bt_\bt_\be_\br_\bn is omit-
- ted, it is treated like a ?\b?, which matches every character. If
- _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@ or *\b*, the case modification operation is applied
- to each positional parameter in turn, and the expansion is the
- resultant list. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an array variable subscripted
- with @\b@ or *\b*, the case modification operation is applied to each
- member of the array in turn, and the expansion is the resultant
+ C\bCa\bas\bse\be m\bmo\bod\bdi\bif\bfi\bic\bca\bat\bti\bio\bon\bn. This expansion modifies the case of alpha-
+ betic characters in _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br. The _\bp_\ba_\bt_\bt_\be_\br_\bn is expanded to pro-
+ duce a pattern just as in pathname expansion. The ^\b^ operator
+ converts lowercase letters matching _\bp_\ba_\bt_\bt_\be_\br_\bn to uppercase; the ,\b,
+ operator converts matching uppercase letters to lowercase. The
+ ^\b^^\b^ and ,\b,,\b, expansions convert each matched character in the
+ expanded value; the ^\b^ and ,\b, expansions match and convert only
+ the first character in the expanded value. If _\bp_\ba_\bt_\bt_\be_\br_\bn is omit-
+ ted, it is treated like a ?\b?, which matches every character. If
+ _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is @\b@ or *\b*, the case modification operation is applied
+ to each positional parameter in turn, and the expansion is the
+ resultant list. If _\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br is an array variable subscripted
+ with @\b@ or *\b*, the case modification operation is applied to each
+ member of the array in turn, and the expansion is the resultant
list.
C\bCo\bom\bmm\bma\ban\bnd\bd S\bSu\bub\bbs\bst\bti\bit\btu\but\bti\bio\bon\bn
`\b`_\bc_\bo_\bm_\bm_\ba_\bn_\bd`\b`
B\bBa\bas\bsh\bh performs the expansion by executing _\bc_\bo_\bm_\bm_\ba_\bn_\bd and replacing the com-
- mand substitution with the standard output of the command, with any
+ mand substitution with the standard output of the command, with any
trailing newlines deleted. Embedded newlines are not deleted, but they
- may be removed during word splitting. The command substitution $\b$(\b(c\bca\bat\bt
+ may be removed during word splitting. The command substitution $\b$(\b(c\bca\bat\bt
_\bf_\bi_\bl_\be)\b) can be replaced by the equivalent but faster $\b$(\b(<\b< _\bf_\bi_\bl_\be)\b).
- When the old-style backquote form of substitution is used, backslash
- retains its literal meaning except when followed by $\b$, `\b`, or \\b\. The
+ When the old-style backquote form of substitution is used, backslash
+ retains its literal meaning except when followed by $\b$, `\b`, or \\b\. The
first backquote not preceded by a backslash terminates the command sub-
- stitution. When using the $(_\bc_\bo_\bm_\bm_\ba_\bn_\bd) form, all characters between the
+ stitution. When using the $(_\bc_\bo_\bm_\bm_\ba_\bn_\bd) form, all characters between the
parentheses make up the command; none are treated specially.
Command substitutions may be nested. To nest when using the backquoted
form, escape the inner backquotes with backslashes.
- If the substitution appears within double quotes, word splitting and
+ If the substitution appears within double quotes, word splitting and
pathname expansion are not performed on the results.
A\bAr\bri\bit\bth\bhm\bme\bet\bti\bic\bc E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn
- Arithmetic expansion allows the evaluation of an arithmetic expression
- and the substitution of the result. The format for arithmetic expan-
+ Arithmetic expansion allows the evaluation of an arithmetic expression
+ and the substitution of the result. The format for arithmetic expan-
sion is:
$\b$(\b((\b(_\be_\bx_\bp_\br_\be_\bs_\bs_\bi_\bo_\bn)\b))\b)
- The _\be_\bx_\bp_\br_\be_\bs_\bs_\bi_\bo_\bn is treated as if it were within double quotes, but a
- double quote inside the parentheses is not treated specially. All
+ The _\be_\bx_\bp_\br_\be_\bs_\bs_\bi_\bo_\bn is treated as if it were within double quotes, but a
+ double quote inside the parentheses is not treated specially. All
tokens in the expression undergo parameter expansion, string expansion,
- command substitution, and quote removal. Arithmetic expansions may be
+ command substitution, and quote removal. Arithmetic expansions may be
nested.
- The evaluation is performed according to the rules listed below under
+ The evaluation is performed according to the rules listed below under
A\bAR\bRI\bIT\bTH\bHM\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN. If _\be_\bx_\bp_\br_\be_\bs_\bs_\bi_\bo_\bn is invalid, b\bba\bas\bsh\bh prints a message
indicating failure and no substitution occurs.
P\bPr\bro\boc\bce\bes\bss\bs S\bSu\bub\bbs\bst\bti\bit\btu\but\bti\bio\bon\bn
- _\bP_\br_\bo_\bc_\be_\bs_\bs _\bs_\bu_\bb_\bs_\bt_\bi_\bt_\bu_\bt_\bi_\bo_\bn is supported on systems that support named pipes
- (_\bF_\bI_\bF_\bO_\bs) or the /\b/d\bde\bev\bv/\b/f\bfd\bd method of naming open files. It takes the form
- of <\b<(\b(_\bl_\bi_\bs_\bt)\b) or >\b>(\b(_\bl_\bi_\bs_\bt)\b). The process _\bl_\bi_\bs_\bt is run with its input or out-
+ _\bP_\br_\bo_\bc_\be_\bs_\bs _\bs_\bu_\bb_\bs_\bt_\bi_\bt_\bu_\bt_\bi_\bo_\bn is supported on systems that support named pipes
+ (_\bF_\bI_\bF_\bO_\bs) or the /\b/d\bde\bev\bv/\b/f\bfd\bd method of naming open files. It takes the form
+ of <\b<(\b(_\bl_\bi_\bs_\bt)\b) or >\b>(\b(_\bl_\bi_\bs_\bt)\b). The process _\bl_\bi_\bs_\bt is run with its input or out-
put connected to a _\bF_\bI_\bF_\bO or some file in /\b/d\bde\bev\bv/\b/f\bfd\bd. The name of this file
- is passed as an argument to the current command as the result of the
- expansion. If the >\b>(\b(_\bl_\bi_\bs_\bt)\b) form is used, writing to the file will pro-
- vide input for _\bl_\bi_\bs_\bt. If the <\b<(\b(_\bl_\bi_\bs_\bt)\b) form is used, the file passed as
+ is passed as an argument to the current command as the result of the
+ expansion. If the >\b>(\b(_\bl_\bi_\bs_\bt)\b) form is used, writing to the file will pro-
+ vide input for _\bl_\bi_\bs_\bt. If the <\b<(\b(_\bl_\bi_\bs_\bt)\b) form is used, the file passed as
an argument should be read to obtain the output of _\bl_\bi_\bs_\bt.
- When available, process substitution is performed simultaneously with
- parameter and variable expansion, command substitution, and arithmetic
+ When available, process substitution is performed simultaneously with
+ parameter and variable expansion, command substitution, and arithmetic
expansion.
W\bWo\bor\brd\bd S\bSp\bpl\bli\bit\btt\bti\bin\bng\bg
- The shell scans the results of parameter expansion, command substitu-
- tion, and arithmetic expansion that did not occur within double quotes
+ The shell scans the results of parameter expansion, command substitu-
+ tion, and arithmetic expansion that did not occur within double quotes
for _\bw_\bo_\br_\bd _\bs_\bp_\bl_\bi_\bt_\bt_\bi_\bn_\bg.
- The shell treats each character of I\bIF\bFS\bS as a delimiter, and splits the
+ The shell treats each character of I\bIF\bFS\bS as a delimiter, and splits the
results of the other expansions into words on these characters. If I\bIF\bFS\bS
- is unset, or its value is exactly <\b<s\bsp\bpa\bac\bce\be>\b><\b<t\bta\bab\bb>\b><\b<n\bne\bew\bwl\bli\bin\bne\be>\b>, the default,
- then sequences of <\b<s\bsp\bpa\bac\bce\be>\b>, <\b<t\bta\bab\bb>\b>, and <\b<n\bne\bew\bwl\bli\bin\bne\be>\b> at the beginning and
- end of the results of the previous expansions are ignored, and any
- sequence of I\bIF\bFS\bS characters not at the beginning or end serves to
- delimit words. If I\bIF\bFS\bS has a value other than the default, then
+ is unset, or its value is exactly <\b<s\bsp\bpa\bac\bce\be>\b><\b<t\bta\bab\bb>\b><\b<n\bne\bew\bwl\bli\bin\bne\be>\b>, the default,
+ then sequences of <\b<s\bsp\bpa\bac\bce\be>\b>, <\b<t\bta\bab\bb>\b>, and <\b<n\bne\bew\bwl\bli\bin\bne\be>\b> at the beginning and
+ end of the results of the previous expansions are ignored, and any
+ sequence of I\bIF\bFS\bS characters not at the beginning or end serves to
+ delimit words. If I\bIF\bFS\bS has a value other than the default, then
sequences of the whitespace characters s\bsp\bpa\bac\bce\be and t\bta\bab\bb are ignored at the
- beginning and end of the word, as long as the whitespace character is
- in the value of I\bIF\bFS\bS (an I\bIF\bFS\bS whitespace character). Any character in
- I\bIF\bFS\bS that is not I\bIF\bFS\bS whitespace, along with any adjacent I\bIF\bFS\bS whitespace
- characters, delimits a field. A sequence of I\bIF\bFS\bS whitespace characters
- is also treated as a delimiter. If the value of I\bIF\bFS\bS is null, no word
+ beginning and end of the word, as long as the whitespace character is
+ in the value of I\bIF\bFS\bS (an I\bIF\bFS\bS whitespace character). Any character in
+ I\bIF\bFS\bS that is not I\bIF\bFS\bS whitespace, along with any adjacent I\bIF\bFS\bS whitespace
+ characters, delimits a field. A sequence of I\bIF\bFS\bS whitespace characters
+ is also treated as a delimiter. If the value of I\bIF\bFS\bS is null, no word
splitting occurs.
- Explicit null arguments ("\b""\b" or '\b''\b') are retained. Unquoted implicit
+ Explicit null arguments ("\b""\b" or '\b''\b') are retained. Unquoted implicit
null arguments, resulting from the expansion of parameters that have no
- values, are removed. If a parameter with no value is expanded within
+ values, are removed. If a parameter with no value is expanded within
double quotes, a null argument results and is retained.
Note that if no expansion occurs, no splitting is performed.
P\bPa\bat\bth\bhn\bna\bam\bme\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn
- After word splitting, unless the -\b-f\bf option has been set, b\bba\bas\bsh\bh scans
- each word for the characters *\b*, ?\b?, and [\b[. If one of these characters
- appears, then the word is regarded as a _\bp_\ba_\bt_\bt_\be_\br_\bn, and replaced with an
- alphabetically sorted list of file names matching the pattern. If no
- matching file names are found, and the shell option n\bnu\bul\bll\blg\bgl\blo\bob\bb is not
- enabled, the word is left unchanged. If the n\bnu\bul\bll\blg\bgl\blo\bob\bb option is set,
- and no matches are found, the word is removed. If the f\bfa\bai\bil\blg\bgl\blo\bob\bb shell
- option is set, and no matches are found, an error message is printed
- and the command is not executed. If the shell option n\bno\boc\bca\bas\bse\beg\bgl\blo\bob\bb is
- enabled, the match is performed without regard to the case of alpha-
- betic characters. When a pattern is used for pathname expansion, the
- character `\b``\b`.\b.'\b''\b' at the start of a name or immediately following a
- slash must be matched explicitly, unless the shell option d\bdo\bot\btg\bgl\blo\bob\bb is
- set. When matching a pathname, the slash character must always be
- matched explicitly. In other cases, the `\b``\b`.\b.'\b''\b' character is not
- treated specially. See the description of s\bsh\bho\bop\bpt\bt below under S\bSH\bHE\bEL\bLL\bL
- B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS for a description of the n\bno\boc\bca\bas\bse\beg\bgl\blo\bob\bb, n\bnu\bul\bll\blg\bgl\blo\bob\bb, f\bfa\bai\bil\bl-\b-
+ After word splitting, unless the -\b-f\bf option has been set, b\bba\bas\bsh\bh scans
+ each word for the characters *\b*, ?\b?, and [\b[. If one of these characters
+ appears, then the word is regarded as a _\bp_\ba_\bt_\bt_\be_\br_\bn, and replaced with an
+ alphabetically sorted list of file names matching the pattern. If no
+ matching file names are found, and the shell option n\bnu\bul\bll\blg\bgl\blo\bob\bb is not
+ enabled, the word is left unchanged. If the n\bnu\bul\bll\blg\bgl\blo\bob\bb option is set,
+ and no matches are found, the word is removed. If the f\bfa\bai\bil\blg\bgl\blo\bob\bb shell
+ option is set, and no matches are found, an error message is printed
+ and the command is not executed. If the shell option n\bno\boc\bca\bas\bse\beg\bgl\blo\bob\bb is
+ enabled, the match is performed without regard to the case of alpha-
+ betic characters. When a pattern is used for pathname expansion, the
+ character `\b``\b`.\b.'\b''\b' at the start of a name or immediately following a
+ slash must be matched explicitly, unless the shell option d\bdo\bot\btg\bgl\blo\bob\bb is
+ set. When matching a pathname, the slash character must always be
+ matched explicitly. In other cases, the `\b``\b`.\b.'\b''\b' character is not
+ treated specially. See the description of s\bsh\bho\bop\bpt\bt below under S\bSH\bHE\bEL\bLL\bL
+ B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS for a description of the n\bno\boc\bca\bas\bse\beg\bgl\blo\bob\bb, n\bnu\bul\bll\blg\bgl\blo\bob\bb, f\bfa\bai\bil\bl-\b-
g\bgl\blo\bob\bb, and d\bdo\bot\btg\bgl\blo\bob\bb shell options.
- The G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE shell variable may be used to restrict the set of file
- names matching a _\bp_\ba_\bt_\bt_\be_\br_\bn. If G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE is set, each matching file
- name that also matches one of the patterns in G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE is removed
+ The G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE shell variable may be used to restrict the set of file
+ names matching a _\bp_\ba_\bt_\bt_\be_\br_\bn. If G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE is set, each matching file
+ name that also matches one of the patterns in G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE is removed
from the list of matches. The file names `\b``\b`.\b.'\b''\b' and `\b``\b`.\b..\b.'\b''\b' are always
- ignored when G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE is set and not null. However, setting G\bGL\bLO\bOB\bBI\bIG\bG-\b-
- N\bNO\bOR\bRE\bE to a non-null value has the effect of enabling the d\bdo\bot\btg\bgl\blo\bob\bb shell
+ ignored when G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE is set and not null. However, setting G\bGL\bLO\bOB\bBI\bIG\bG-\b-
+ N\bNO\bOR\bRE\bE to a non-null value has the effect of enabling the d\bdo\bot\btg\bgl\blo\bob\bb shell
option, so all other file names beginning with a `\b``\b`.\b.'\b''\b' will match. To
- get the old behavior of ignoring file names beginning with a `\b``\b`.\b.'\b''\b',
- make `\b``\b`.\b.*\b*'\b''\b' one of the patterns in G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE. The d\bdo\bot\btg\bgl\blo\bob\bb option is
+ get the old behavior of ignoring file names beginning with a `\b``\b`.\b.'\b''\b',
+ make `\b``\b`.\b.*\b*'\b''\b' one of the patterns in G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE. The d\bdo\bot\btg\bgl\blo\bob\bb option is
disabled when G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE is unset.
P\bPa\bat\btt\bte\ber\brn\bn M\bMa\bat\btc\bch\bhi\bin\bng\bg
Any character that appears in a pattern, other than the special pattern
- characters described below, matches itself. The NUL character may not
- occur in a pattern. A backslash escapes the following character; the
- escaping backslash is discarded when matching. The special pattern
+ characters described below, matches itself. The NUL character may not
+ occur in a pattern. A backslash escapes the following character; the
+ escaping backslash is discarded when matching. The special pattern
characters must be quoted if they are to be matched literally.
The special pattern characters have the following meanings:
- *\b* Matches any string, including the null string. When the g\bgl\blo\bob\bb-\b-
- s\bst\bta\bar\br shell option is enabled, and *\b* is used in a pathname expan-
- sion context, two adjacent *\b*s used as a single pattern will
- match all files and zero or more directories and subdirectories.
- If followed by a /\b/, two adjacent *\b*s will match only directories
- and subdirectories.
- ?\b? Matches any single character.
- [\b[.\b..\b..\b.]\b] Matches any one of the enclosed characters. A pair of charac-
- ters separated by a hyphen denotes a _\br_\ba_\bn_\bg_\be _\be_\bx_\bp_\br_\be_\bs_\bs_\bi_\bo_\bn; any char-
- acter that sorts between those two characters, inclusive, using
- the current locale's collating sequence and character set, is
- matched. If the first character following the [\b[ is a !\b! or a ^\b^
- then any character not enclosed is matched. The sorting order
- of characters in range expressions is determined by the current
- locale and the value of the L\bLC\bC_\b_C\bCO\bOL\bLL\bLA\bAT\bTE\bE shell variable, if set.
- A -\b- may be matched by including it as the first or last charac-
- ter in the set. A ]\b] may be matched by including it as the first
- character in the set.
-
- Within [\b[ and ]\b], _\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br _\bc_\bl_\ba_\bs_\bs_\be_\bs can be specified using the
- syntax [\b[:\b:_\bc_\bl_\ba_\bs_\bs:\b:]\b], where _\bc_\bl_\ba_\bs_\bs is one of the following classes
- defined in the POSIX standard:
- a\bal\bln\bnu\bum\bm a\bal\blp\bph\bha\ba a\bas\bsc\bci\bii\bi b\bbl\bla\ban\bnk\bk c\bcn\bnt\btr\brl\bl d\bdi\big\bgi\bit\bt g\bgr\bra\bap\bph\bh l\blo\bow\bwe\ber\br p\bpr\bri\bin\bnt\bt p\bpu\bun\bnc\bct\bt
- s\bsp\bpa\bac\bce\be u\bup\bpp\bpe\ber\br w\bwo\bor\brd\bd x\bxd\bdi\big\bgi\bit\bt
- A character class matches any character belonging to that class.
- The w\bwo\bor\brd\bd character class matches letters, digits, and the char-
- acter _.
-
- Within [\b[ and ]\b], an _\be_\bq_\bu_\bi_\bv_\ba_\bl_\be_\bn_\bc_\be _\bc_\bl_\ba_\bs_\bs can be specified using the
- syntax [\b[=\b=_\bc=\b=]\b], which matches all characters with the same colla-
- tion weight (as defined by the current locale) as the character
- _\bc.
-
- Within [\b[ and ]\b], the syntax [\b[.\b._\bs_\by_\bm_\bb_\bo_\bl.\b.]\b] matches the collating sym-
- bol _\bs_\by_\bm_\bb_\bo_\bl.
+ *\b* Matches any string, including the null string. When the
+ g\bgl\blo\bob\bbs\bst\bta\bar\br shell option is enabled, and *\b* is used in a
+ pathname expansion context, two adjacent *\b*s used as a
+ single pattern will match all files and zero or more
+ directories and subdirectories. If followed by a /\b/, two
+ adjacent *\b*s will match only directories and subdirecto-
+ ries.
+ ?\b? Matches any single character.
+ [\b[.\b..\b..\b.]\b] Matches any one of the enclosed characters. A pair of
+ characters separated by a hyphen denotes a _\br_\ba_\bn_\bg_\be _\be_\bx_\bp_\br_\be_\bs_\b-
+ _\bs_\bi_\bo_\bn; any character that sorts between those two charac-
+ ters, inclusive, using the current locale's collating
+ sequence and character set, is matched. If the first
+ character following the [\b[ is a !\b! or a ^\b^ then any charac-
+ ter not enclosed is matched. The sorting order of char-
+ acters in range expressions is determined by the current
+ locale and the value of the L\bLC\bC_\b_C\bCO\bOL\bLL\bLA\bAT\bTE\bE shell variable, if
+ set. A -\b- may be matched by including it as the first or
+ last character in the set. A ]\b] may be matched by includ-
+ ing it as the first character in the set.
+
+ Within [\b[ and ]\b], _\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br _\bc_\bl_\ba_\bs_\bs_\be_\bs can be specified using
+ the syntax [\b[:\b:_\bc_\bl_\ba_\bs_\bs:\b:]\b], where _\bc_\bl_\ba_\bs_\bs is one of the following
+ classes defined in the POSIX standard:
+ a\bal\bln\bnu\bum\bm a\bal\blp\bph\bha\ba a\bas\bsc\bci\bii\bi b\bbl\bla\ban\bnk\bk c\bcn\bnt\btr\brl\bl d\bdi\big\bgi\bit\bt g\bgr\bra\bap\bph\bh l\blo\bow\bwe\ber\br p\bpr\bri\bin\bnt\bt
+ p\bpu\bun\bnc\bct\bt s\bsp\bpa\bac\bce\be u\bup\bpp\bpe\ber\br w\bwo\bor\brd\bd x\bxd\bdi\big\bgi\bit\bt
+ A character class matches any character belonging to that
+ class. The w\bwo\bor\brd\bd character class matches letters, digits,
+ and the character _.
+
+ Within [\b[ and ]\b], an _\be_\bq_\bu_\bi_\bv_\ba_\bl_\be_\bn_\bc_\be _\bc_\bl_\ba_\bs_\bs can be specified
+ using the syntax [\b[=\b=_\bc=\b=]\b], which matches all characters with
+ the same collation weight (as defined by the current
+ locale) as the character _\bc.
+
+ Within [\b[ and ]\b], the syntax [\b[.\b._\bs_\by_\bm_\bb_\bo_\bl.\b.]\b] matches the collat-
+ ing symbol _\bs_\by_\bm_\bb_\bo_\bl.
If the e\bex\bxt\btg\bgl\blo\bob\bb shell option is enabled using the s\bsh\bho\bop\bpt\bt builtin, several
- extended pattern matching operators are recognized. In the following
+ extended pattern matching operators are recognized. In the following
description, a _\bp_\ba_\bt_\bt_\be_\br_\bn_\b-_\bl_\bi_\bs_\bt is a list of one or more patterns separated
by a |\b|. Composite patterns may be formed using one or more of the fol-
lowing sub-patterns:
Q\bQu\buo\bot\bte\be R\bRe\bem\bmo\bov\bva\bal\bl
After the preceding expansions, all unquoted occurrences of the charac-
- ters \\b\, '\b', and "\b" that did not result from one of the above expansions
+ ters \\b\, '\b', and "\b" that did not result from one of the above expansions
are removed.
R\bRE\bED\bDI\bIR\bRE\bEC\bCT\bTI\bIO\bON\bN
- Before a command is executed, its input and output may be _\br_\be_\bd_\bi_\br_\be_\bc_\bt_\be_\bd
- using a special notation interpreted by the shell. Redirection may
- also be used to open and close files for the current shell execution
+ Before a command is executed, its input and output may be _\br_\be_\bd_\bi_\br_\be_\bc_\bt_\be_\bd
+ using a special notation interpreted by the shell. Redirection may
+ also be used to open and close files for the current shell execution
environment. The following redirection operators may precede or appear
anywhere within a _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd or may follow a _\bc_\bo_\bm_\bm_\ba_\bn_\bd. Redirections
are processed in the order they appear, from left to right.
- Each redirection that may be preceded by a file descriptor number may
+ Each redirection that may be preceded by a file descriptor number may
instead be preceded by a word of the form {_\bv_\ba_\br_\bn_\ba_\bm_\be}. In this case, for
each redirection operator except >&- and <&-, the shell will allocate a
- file descriptor greater than 10 and assign it to _\bv_\ba_\br_\bn_\ba_\bm_\be. If >&- or
- <&- is preceded by {_\bv_\ba_\br_\bn_\ba_\bm_\be}, the value of _\bv_\ba_\br_\bn_\ba_\bm_\be defines the file
+ file descriptor greater than 10 and assign it to _\bv_\ba_\br_\bn_\ba_\bm_\be. If >&- or
+ <&- is preceded by {_\bv_\ba_\br_\bn_\ba_\bm_\be}, the value of _\bv_\ba_\br_\bn_\ba_\bm_\be defines the file
descriptor to close.
- In the following descriptions, if the file descriptor number is omit-
- ted, and the first character of the redirection operator is <\b<, the re-
- direction refers to the standard input (file descriptor 0). If the
- first character of the redirection operator is >\b>, the redirection
+ In the following descriptions, if the file descriptor number is omit-
+ ted, and the first character of the redirection operator is <\b<, the re-
+ direction refers to the standard input (file descriptor 0). If the
+ first character of the redirection operator is >\b>, the redirection
refers to the standard output (file descriptor 1).
- The word following the redirection operator in the following descrip-
- tions, unless otherwise noted, is subjected to brace expansion, tilde
+ The word following the redirection operator in the following descrip-
+ tions, unless otherwise noted, is subjected to brace expansion, tilde
expansion, parameter expansion, command substitution, arithmetic expan-
- sion, quote removal, pathname expansion, and word splitting. If it
+ sion, quote removal, pathname expansion, and word splitting. If it
expands to more than one word, b\bba\bas\bsh\bh reports an error.
- Note that the order of redirections is significant. For example, the
+ Note that the order of redirections is significant. For example, the
command
ls >\b> dirlist 2>\b>&\b&1
- directs both standard output and standard error to the file _\bd_\bi_\br_\bl_\bi_\bs_\bt,
+ directs both standard output and standard error to the file _\bd_\bi_\br_\bl_\bi_\bs_\bt,
while the command
ls 2>\b>&\b&1 >\b> dirlist
- directs only the standard output to file _\bd_\bi_\br_\bl_\bi_\bs_\bt, because the standard
- error was duplicated from the standard output before the standard out-
+ directs only the standard output to file _\bd_\bi_\br_\bl_\bi_\bs_\bt, because the standard
+ error was duplicated from the standard output before the standard out-
put was redirected to _\bd_\bi_\br_\bl_\bi_\bs_\bt.
B\bBa\bas\bsh\bh handles several filenames specially when they are used in redirec-
tions, as described in the following table:
/\b/d\bde\bev\bv/\b/f\bfd\bd/\b/_\bf_\bd
- If _\bf_\bd is a valid integer, file descriptor _\bf_\bd is dupli-
+ If _\bf_\bd is a valid integer, file descriptor _\bf_\bd is dupli-
cated.
/\b/d\bde\bev\bv/\b/s\bst\btd\bdi\bin\bn
File descriptor 0 is duplicated.
File descriptor 2 is duplicated.
/\b/d\bde\bev\bv/\b/t\btc\bcp\bp/\b/_\bh_\bo_\bs_\bt/\b/_\bp_\bo_\br_\bt
If _\bh_\bo_\bs_\bt is a valid hostname or Internet address, and _\bp_\bo_\br_\bt
- is an integer port number or service name, b\bba\bas\bsh\bh attempts
+ is an integer port number or service name, b\bba\bas\bsh\bh attempts
to open a TCP connection to the corresponding socket.
/\b/d\bde\bev\bv/\b/u\bud\bdp\bp/\b/_\bh_\bo_\bs_\bt/\b/_\bp_\bo_\br_\bt
If _\bh_\bo_\bs_\bt is a valid hostname or Internet address, and _\bp_\bo_\br_\bt
- is an integer port number or service name, b\bba\bas\bsh\bh attempts
+ is an integer port number or service name, b\bba\bas\bsh\bh attempts
to open a UDP connection to the corresponding socket.
A failure to open or create a file causes the redirection to fail.
- Redirections using file descriptors greater than 9 should be used with
- care, as they may conflict with file descriptors the shell uses inter-
+ Redirections using file descriptors greater than 9 should be used with
+ care, as they may conflict with file descriptors the shell uses inter-
nally.
R\bRe\bed\bdi\bir\bre\bec\bct\bti\bin\bng\bg I\bIn\bnp\bpu\but\bt
Redirection of input causes the file whose name results from the expan-
- sion of _\bw_\bo_\br_\bd to be opened for reading on file descriptor _\bn, or the
+ sion of _\bw_\bo_\br_\bd to be opened for reading on file descriptor _\bn, or the
standard input (file descriptor 0) if _\bn is not specified.
The general format for redirecting input is:
[_\bn]<\b<_\bw_\bo_\br_\bd
R\bRe\bed\bdi\bir\bre\bec\bct\bti\bin\bng\bg O\bOu\but\btp\bpu\but\bt
- Redirection of output causes the file whose name results from the
+ Redirection of output causes the file whose name results from the
expansion of _\bw_\bo_\br_\bd to be opened for writing on file descriptor _\bn, or the
standard output (file descriptor 1) if _\bn is not specified. If the file
- does not exist it is created; if it does exist it is truncated to zero
+ does not exist it is created; if it does exist it is truncated to zero
size.
The general format for redirecting output is:
[_\bn]>\b>_\bw_\bo_\br_\bd
- If the redirection operator is >\b>, and the n\bno\boc\bcl\blo\bob\bbb\bbe\ber\br option to the s\bse\bet\bt
- builtin has been enabled, the redirection will fail if the file whose
- name results from the expansion of _\bw_\bo_\br_\bd exists and is a regular file.
+ If the redirection operator is >\b>, and the n\bno\boc\bcl\blo\bob\bbb\bbe\ber\br option to the s\bse\bet\bt
+ builtin has been enabled, the redirection will fail if the file whose
+ name results from the expansion of _\bw_\bo_\br_\bd exists and is a regular file.
If the redirection operator is >\b>|\b|, or the redirection operator is >\b> and
the n\bno\boc\bcl\blo\bob\bbb\bbe\ber\br option to the s\bse\bet\bt builtin command is not enabled, the re-
direction is attempted even if the file named by _\bw_\bo_\br_\bd exists.
A\bAp\bpp\bpe\ben\bnd\bdi\bin\bng\bg R\bRe\bed\bdi\bir\bre\bec\bct\bte\bed\bd O\bOu\but\btp\bpu\but\bt
- Redirection of output in this fashion causes the file whose name
- results from the expansion of _\bw_\bo_\br_\bd to be opened for appending on file
- descriptor _\bn, or the standard output (file descriptor 1) if _\bn is not
+ Redirection of output in this fashion causes the file whose name
+ results from the expansion of _\bw_\bo_\br_\bd to be opened for appending on file
+ descriptor _\bn, or the standard output (file descriptor 1) if _\bn is not
specified. If the file does not exist it is created.
The general format for appending output is:
R\bRe\bed\bdi\bir\bre\bec\bct\bti\bin\bng\bg S\bSt\bta\ban\bnd\bda\bar\brd\bd O\bOu\but\btp\bpu\but\bt a\ban\bnd\bd S\bSt\bta\ban\bnd\bda\bar\brd\bd E\bEr\brr\bro\bor\br
- This construct allows both the standard output (file descriptor 1) and
- the standard error output (file descriptor 2) to be redirected to the
+ This construct allows both the standard output (file descriptor 1) and
+ the standard error output (file descriptor 2) to be redirected to the
file whose name is the expansion of _\bw_\bo_\br_\bd.
- There are two formats for redirecting standard output and standard
+ There are two formats for redirecting standard output and standard
error:
&\b&>\b>_\bw_\bo_\br_\bd
A\bAp\bpp\bpe\ben\bnd\bdi\bin\bng\bg S\bSt\bta\ban\bnd\bda\bar\brd\bd O\bOu\but\btp\bpu\but\bt a\ban\bnd\bd S\bSt\bta\ban\bnd\bda\bar\brd\bd E\bEr\brr\bro\bor\br
- This construct allows both the standard output (file descriptor 1) and
- the standard error output (file descriptor 2) to be appended to the
+ This construct allows both the standard output (file descriptor 1) and
+ the standard error output (file descriptor 2) to be appended to the
file whose name is the expansion of _\bw_\bo_\br_\bd.
The format for appending standard output and standard error is:
>\b>>\b>_\bw_\bo_\br_\bd 2>\b>&\b&1
H\bHe\ber\bre\be D\bDo\boc\bcu\bum\bme\ben\bnt\bts\bs
- This type of redirection instructs the shell to read input from the
+ This type of redirection instructs the shell to read input from the
current source until a line containing only _\bd_\be_\bl_\bi_\bm_\bi_\bt_\be_\br (with no trailing
- blanks) is seen. All of the lines read up to that point are then used
+ blanks) is seen. All of the lines read up to that point are then used
as the standard input for a command.
The format of here-documents is:
_\bh_\be_\br_\be_\b-_\bd_\bo_\bc_\bu_\bm_\be_\bn_\bt
_\bd_\be_\bl_\bi_\bm_\bi_\bt_\be_\br
- No parameter expansion, command substitution, arithmetic expansion, or
+ No parameter expansion, command substitution, arithmetic expansion, or
pathname expansion is performed on _\bw_\bo_\br_\bd. If any characters in _\bw_\bo_\br_\bd are
- quoted, the _\bd_\be_\bl_\bi_\bm_\bi_\bt_\be_\br is the result of quote removal on _\bw_\bo_\br_\bd, and the
- lines in the here-document are not expanded. If _\bw_\bo_\br_\bd is unquoted, all
- lines of the here-document are subjected to parameter expansion, com-
- mand substitution, and arithmetic expansion. In the latter case, the
- character sequence \\b\<\b<n\bne\bew\bwl\bli\bin\bne\be>\b> is ignored, and \\b\ must be used to quote
+ quoted, the _\bd_\be_\bl_\bi_\bm_\bi_\bt_\be_\br is the result of quote removal on _\bw_\bo_\br_\bd, and the
+ lines in the here-document are not expanded. If _\bw_\bo_\br_\bd is unquoted, all
+ lines of the here-document are subjected to parameter expansion, com-
+ mand substitution, and arithmetic expansion. In the latter case, the
+ character sequence \\b\<\b<n\bne\bew\bwl\bli\bin\bne\be>\b> is ignored, and \\b\ must be used to quote
the characters \\b\, $\b$, and `\b`.
If the redirection operator is <\b<<\b<-\b-, then all leading tab characters are
- stripped from input lines and the line containing _\bd_\be_\bl_\bi_\bm_\bi_\bt_\be_\br. This
- allows here-documents within shell scripts to be indented in a natural
+ stripped from input lines and the line containing _\bd_\be_\bl_\bi_\bm_\bi_\bt_\be_\br. This
+ allows here-documents within shell scripts to be indented in a natural
fashion.
H\bHe\ber\bre\be S\bSt\btr\bri\bin\bng\bgs\bs
[_\bn]<\b<&\b&_\bw_\bo_\br_\bd
is used to duplicate input file descriptors. If _\bw_\bo_\br_\bd expands to one or
- more digits, the file descriptor denoted by _\bn is made to be a copy of
- that file descriptor. If the digits in _\bw_\bo_\br_\bd do not specify a file
- descriptor open for input, a redirection error occurs. If _\bw_\bo_\br_\bd evalu-
- ates to -\b-, file descriptor _\bn is closed. If _\bn is not specified, the
+ more digits, the file descriptor denoted by _\bn is made to be a copy of
+ that file descriptor. If the digits in _\bw_\bo_\br_\bd do not specify a file
+ descriptor open for input, a redirection error occurs. If _\bw_\bo_\br_\bd evalu-
+ ates to -\b-, file descriptor _\bn is closed. If _\bn is not specified, the
standard input (file descriptor 0) is used.
The operator
[_\bn]>\b>&\b&_\bw_\bo_\br_\bd
- is used similarly to duplicate output file descriptors. If _\bn is not
- specified, the standard output (file descriptor 1) is used. If the
- digits in _\bw_\bo_\br_\bd do not specify a file descriptor open for output, a re-
- direction error occurs. As a special case, if _\bn is omitted, and _\bw_\bo_\br_\bd
+ is used similarly to duplicate output file descriptors. If _\bn is not
+ specified, the standard output (file descriptor 1) is used. If the
+ digits in _\bw_\bo_\br_\bd do not specify a file descriptor open for output, a re-
+ direction error occurs. As a special case, if _\bn is omitted, and _\bw_\bo_\br_\bd
does not expand to one or more digits, the standard output and standard
error are redirected as described previously.
[_\bn]<\b<&\b&_\bd_\bi_\bg_\bi_\bt-\b-
- moves the file descriptor _\bd_\bi_\bg_\bi_\bt to file descriptor _\bn, or the standard
+ moves the file descriptor _\bd_\bi_\bg_\bi_\bt to file descriptor _\bn, or the standard
input (file descriptor 0) if _\bn is not specified. _\bd_\bi_\bg_\bi_\bt is closed after
being duplicated to _\bn.
[_\bn]>\b>&\b&_\bd_\bi_\bg_\bi_\bt-\b-
- moves the file descriptor _\bd_\bi_\bg_\bi_\bt to file descriptor _\bn, or the standard
+ moves the file descriptor _\bd_\bi_\bg_\bi_\bt to file descriptor _\bn, or the standard
output (file descriptor 1) if _\bn is not specified.
O\bOp\bpe\ben\bni\bin\bng\bg F\bFi\bil\ble\be D\bDe\bes\bsc\bcr\bri\bip\bpt\bto\bor\brs\bs f\bfo\bor\br R\bRe\bea\bad\bdi\bin\bng\bg a\ban\bnd\bd W\bWr\bri\bit\bti\bin\bng\bg
[_\bn]<\b<>\b>_\bw_\bo_\br_\bd
- causes the file whose name is the expansion of _\bw_\bo_\br_\bd to be opened for
- both reading and writing on file descriptor _\bn, or on file descriptor 0
+ causes the file whose name is the expansion of _\bw_\bo_\br_\bd to be opened for
+ both reading and writing on file descriptor _\bn, or on file descriptor 0
if _\bn is not specified. If the file does not exist, it is created.
A\bAL\bLI\bIA\bAS\bSE\bES\bS
- _\bA_\bl_\bi_\ba_\bs_\be_\bs allow a string to be substituted for a word when it is used as
- the first word of a simple command. The shell maintains a list of
- aliases that may be set and unset with the a\bal\bli\bia\bas\bs and u\bun\bna\bal\bli\bia\bas\bs builtin
- commands (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). The first word of each
- simple command, if unquoted, is checked to see if it has an alias. If
- so, that word is replaced by the text of the alias. The characters /\b/,
- $\b$, `\b`, and =\b= and any of the shell _\bm_\be_\bt_\ba_\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br_\bs or quoting characters
+ _\bA_\bl_\bi_\ba_\bs_\be_\bs allow a string to be substituted for a word when it is used as
+ the first word of a simple command. The shell maintains a list of
+ aliases that may be set and unset with the a\bal\bli\bia\bas\bs and u\bun\bna\bal\bli\bia\bas\bs builtin
+ commands (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). The first word of each
+ simple command, if unquoted, is checked to see if it has an alias. If
+ so, that word is replaced by the text of the alias. The characters /\b/,
+ $\b$, `\b`, and =\b= and any of the shell _\bm_\be_\bt_\ba_\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br_\bs or quoting characters
listed above may not appear in an alias name. The replacement text may
- contain any valid shell input, including shell metacharacters. The
- first word of the replacement text is tested for aliases, but a word
- that is identical to an alias being expanded is not expanded a second
- time. This means that one may alias l\bls\bs to l\bls\bs -\b-F\bF, for instance, and
- b\bba\bas\bsh\bh does not try to recursively expand the replacement text. If the
- last character of the alias value is a _\bb_\bl_\ba_\bn_\bk, then the next command
+ contain any valid shell input, including shell metacharacters. The
+ first word of the replacement text is tested for aliases, but a word
+ that is identical to an alias being expanded is not expanded a second
+ time. This means that one may alias l\bls\bs to l\bls\bs -\b-F\bF, for instance, and
+ b\bba\bas\bsh\bh does not try to recursively expand the replacement text. If the
+ last character of the alias value is a _\bb_\bl_\ba_\bn_\bk, then the next command
word following the alias is also checked for alias expansion.
Aliases are created and listed with the a\bal\bli\bia\bas\bs command, and removed with
the u\bun\bna\bal\bli\bia\bas\bs command.
- There is no mechanism for using arguments in the replacement text. If
- arguments are needed, a shell function should be used (see F\bFU\bUN\bNC\bCT\bTI\bIO\bON\bNS\bS
+ There is no mechanism for using arguments in the replacement text. If
+ arguments are needed, a shell function should be used (see F\bFU\bUN\bNC\bCT\bTI\bIO\bON\bNS\bS
below).
- Aliases are not expanded when the shell is not interactive, unless the
- e\bex\bxp\bpa\ban\bnd\bd_\b_a\bal\bli\bia\bas\bse\bes\bs shell option is set using s\bsh\bho\bop\bpt\bt (see the description of
+ Aliases are not expanded when the shell is not interactive, unless the
+ e\bex\bxp\bpa\ban\bnd\bd_\b_a\bal\bli\bia\bas\bse\bes\bs shell option is set using s\bsh\bho\bop\bpt\bt (see the description of
s\bsh\bho\bop\bpt\bt under S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
- The rules concerning the definition and use of aliases are somewhat
- confusing. B\bBa\bas\bsh\bh always reads at least one complete line of input
- before executing any of the commands on that line. Aliases are
- expanded when a command is read, not when it is executed. Therefore,
- an alias definition appearing on the same line as another command does
- not take effect until the next line of input is read. The commands
+ The rules concerning the definition and use of aliases are somewhat
+ confusing. B\bBa\bas\bsh\bh always reads at least one complete line of input
+ before executing any of the commands on that line. Aliases are
+ expanded when a command is read, not when it is executed. Therefore,
+ an alias definition appearing on the same line as another command does
+ not take effect until the next line of input is read. The commands
following the alias definition on that line are not affected by the new
- alias. This behavior is also an issue when functions are executed.
- Aliases are expanded when a function definition is read, not when the
- function is executed, because a function definition is itself a com-
+ alias. This behavior is also an issue when functions are executed.
+ Aliases are expanded when a function definition is read, not when the
+ function is executed, because a function definition is itself a com-
pound command. As a consequence, aliases defined in a function are not
- available until after that function is executed. To be safe, always
- put alias definitions on a separate line, and do not use a\bal\bli\bia\bas\bs in com-
+ available until after that function is executed. To be safe, always
+ put alias definitions on a separate line, and do not use a\bal\bli\bia\bas\bs in com-
pound commands.
For almost every purpose, aliases are superseded by shell functions.
F\bFU\bUN\bNC\bCT\bTI\bIO\bON\bNS\bS
- A shell function, defined as described above under S\bSH\bHE\bEL\bLL\bL G\bGR\bRA\bAM\bMM\bMA\bAR\bR,
- stores a series of commands for later execution. When the name of a
- shell function is used as a simple command name, the list of commands
+ A shell function, defined as described above under S\bSH\bHE\bEL\bLL\bL G\bGR\bRA\bAM\bMM\bMA\bAR\bR,
+ stores a series of commands for later execution. When the name of a
+ shell function is used as a simple command name, the list of commands
associated with that function name is executed. Functions are executed
- in the context of the current shell; no new process is created to
- interpret them (contrast this with the execution of a shell script).
- When a function is executed, the arguments to the function become the
+ in the context of the current shell; no new process is created to
+ interpret them (contrast this with the execution of a shell script).
+ When a function is executed, the arguments to the function become the
positional parameters during its execution. The special parameter #\b# is
- updated to reflect the change. Special parameter 0\b0 is unchanged. The
- first element of the F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE variable is set to the name of the func-
+ updated to reflect the change. Special parameter 0\b0 is unchanged. The
+ first element of the F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE variable is set to the name of the func-
tion while the function is executing.
- All other aspects of the shell execution environment are identical
+ All other aspects of the shell execution environment are identical
between a function and its caller with these exceptions: the D\bDE\bEB\bBU\bUG\bG and
- R\bRE\bET\bTU\bUR\bRN\bN traps (see the description of the t\btr\bra\bap\bp builtin under S\bSH\bHE\bEL\bLL\bL
- B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below) are not inherited unless the function has been
- given the t\btr\bra\bac\bce\be attribute (see the description of the d\bde\bec\bcl\bla\bar\bre\be builtin
- below) or the -\b-o\bo f\bfu\bun\bnc\bct\btr\bra\bac\bce\be shell option has been enabled with the s\bse\bet\bt
- builtin (in which case all functions inherit the D\bDE\bEB\bBU\bUG\bG and R\bRE\bET\bTU\bUR\bRN\bN
- traps), and the E\bER\bRR\bR trap is not inherited unless the -\b-o\bo e\ber\brr\brt\btr\bra\bac\bce\be shell
+ R\bRE\bET\bTU\bUR\bRN\bN traps (see the description of the t\btr\bra\bap\bp builtin under S\bSH\bHE\bEL\bLL\bL
+ B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below) are not inherited unless the function has been
+ given the t\btr\bra\bac\bce\be attribute (see the description of the d\bde\bec\bcl\bla\bar\bre\be builtin
+ below) or the -\b-o\bo f\bfu\bun\bnc\bct\btr\bra\bac\bce\be shell option has been enabled with the s\bse\bet\bt
+ builtin (in which case all functions inherit the D\bDE\bEB\bBU\bUG\bG and R\bRE\bET\bTU\bUR\bRN\bN
+ traps), and the E\bER\bRR\bR trap is not inherited unless the -\b-o\bo e\ber\brr\brt\btr\bra\bac\bce\be shell
option has been enabled.
- Variables local to the function may be declared with the l\blo\boc\bca\bal\bl builtin
+ Variables local to the function may be declared with the l\blo\boc\bca\bal\bl builtin
command. Ordinarily, variables and their values are shared between the
function and its caller.
- The F\bFU\bUN\bNC\bCN\bNE\bES\bST\bT variable, if set to a numeric value greater than 0,
- defines a maximum function nesting level. Function invocations that
+ The F\bFU\bUN\bNC\bCN\bNE\bES\bST\bT variable, if set to a numeric value greater than 0,
+ defines a maximum function nesting level. Function invocations that
exceed the limit cause the entire command to abort.
- If the builtin command r\bre\bet\btu\bur\brn\bn is executed in a function, the function
- completes and execution resumes with the next command after the func-
- tion call. Any command associated with the R\bRE\bET\bTU\bUR\bRN\bN trap is executed
+ If the builtin command r\bre\bet\btu\bur\brn\bn is executed in a function, the function
+ completes and execution resumes with the next command after the func-
+ tion call. Any command associated with the R\bRE\bET\bTU\bUR\bRN\bN trap is executed
before execution resumes. When a function completes, the values of the
- positional parameters and the special parameter #\b# are restored to the
+ positional parameters and the special parameter #\b# are restored to the
values they had prior to the function's execution.
- Function names and definitions may be listed with the -\b-f\bf option to the
+ Function names and definitions may be listed with the -\b-f\bf option to the
d\bde\bec\bcl\bla\bar\bre\be or t\bty\byp\bpe\bes\bse\bet\bt builtin commands. The -\b-F\bF option to d\bde\bec\bcl\bla\bar\bre\be or t\bty\byp\bpe\be-\b-
- s\bse\bet\bt will list the function names only (and optionally the source file
- and line number, if the e\bex\bxt\btd\bde\beb\bbu\bug\bg shell option is enabled). Functions
- may be exported so that subshells automatically have them defined with
- the -\b-f\bf option to the e\bex\bxp\bpo\bor\brt\bt builtin. A function definition may be
- deleted using the -\b-f\bf option to the u\bun\bns\bse\bet\bt builtin. Note that shell
+ s\bse\bet\bt will list the function names only (and optionally the source file
+ and line number, if the e\bex\bxt\btd\bde\beb\bbu\bug\bg shell option is enabled). Functions
+ may be exported so that subshells automatically have them defined with
+ the -\b-f\bf option to the e\bex\bxp\bpo\bor\brt\bt builtin. A function definition may be
+ deleted using the -\b-f\bf option to the u\bun\bns\bse\bet\bt builtin. Note that shell
functions and variables with the same name may result in multiple iden-
- tically-named entries in the environment passed to the shell's chil-
+ tically-named entries in the environment passed to the shell's chil-
dren. Care should be taken in cases where this may cause a problem.
Functions may be recursive. The F\bFU\bUN\bNC\bCN\bNE\bES\bST\bT variable may be used to limit
- the depth of the function call stack and restrict the number of func-
- tion invocations. By default, no limit is imposed on the number of
+ the depth of the function call stack and restrict the number of func-
+ tion invocations. By default, no limit is imposed on the number of
recursive calls.
A\bAR\bRI\bIT\bTH\bHM\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN
- The shell allows arithmetic expressions to be evaluated, under certain
- circumstances (see the l\ble\bet\bt and d\bde\bec\bcl\bla\bar\bre\be builtin commands and A\bAr\bri\bit\bth\bhm\bme\bet\bti\bic\bc
- E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn). Evaluation is done in fixed-width integers with no check
- for overflow, though division by 0 is trapped and flagged as an error.
- The operators and their precedence, associativity, and values are the
- same as in the C language. The following list of operators is grouped
- into levels of equal-precedence operators. The levels are listed in
+ The shell allows arithmetic expressions to be evaluated, under certain
+ circumstances (see the l\ble\bet\bt and d\bde\bec\bcl\bla\bar\bre\be builtin commands and A\bAr\bri\bit\bth\bhm\bme\bet\bti\bic\bc
+ E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn). Evaluation is done in fixed-width integers with no check
+ for overflow, though division by 0 is trapped and flagged as an error.
+ The operators and their precedence, associativity, and values are the
+ same as in the C language. The following list of operators is grouped
+ into levels of equal-precedence operators. The levels are listed in
order of decreasing precedence.
_\bi_\bd+\b++\b+ _\bi_\bd-\b--\b-
_\be_\bx_\bp_\br_\b1 ,\b, _\be_\bx_\bp_\br_\b2
comma
- Shell variables are allowed as operands; parameter expansion is per-
+ Shell variables are allowed as operands; parameter expansion is per-
formed before the expression is evaluated. Within an expression, shell
- variables may also be referenced by name without using the parameter
- expansion syntax. A shell variable that is null or unset evaluates to
+ variables may also be referenced by name without using the parameter
+ expansion syntax. A shell variable that is null or unset evaluates to
0 when referenced by name without using the parameter expansion syntax.
- The value of a variable is evaluated as an arithmetic expression when
- it is referenced, or when a variable which has been given the _\bi_\bn_\bt_\be_\bg_\be_\br
+ The value of a variable is evaluated as an arithmetic expression when
+ it is referenced, or when a variable which has been given the _\bi_\bn_\bt_\be_\bg_\be_\br
attribute using d\bde\bec\bcl\bla\bar\bre\be -\b-i\bi is assigned a value. A null value evaluates
- to 0. A shell variable need not have its _\bi_\bn_\bt_\be_\bg_\be_\br attribute turned on
+ to 0. A shell variable need not have its _\bi_\bn_\bt_\be_\bg_\be_\br attribute turned on
to be used in an expression.
Constants with a leading 0 are interpreted as octal numbers. A leading
- 0x or 0X denotes hexadecimal. Otherwise, numbers take the form
- [_\bb_\ba_\bs_\be_\b#]n, where the optional _\bb_\ba_\bs_\be is a decimal number between 2 and 64
- representing the arithmetic base, and _\bn is a number in that base. If
- _\bb_\ba_\bs_\be_\b# is omitted, then base 10 is used. The digits greater than 9 are
- represented by the lowercase letters, the uppercase letters, @, and _,
- in that order. If _\bb_\ba_\bs_\be is less than or equal to 36, lowercase and
- uppercase letters may be used interchangeably to represent numbers
+ 0x or 0X denotes hexadecimal. Otherwise, numbers take the form
+ [_\bb_\ba_\bs_\be_\b#]n, where the optional _\bb_\ba_\bs_\be is a decimal number between 2 and 64
+ representing the arithmetic base, and _\bn is a number in that base. If
+ _\bb_\ba_\bs_\be_\b# is omitted, then base 10 is used. The digits greater than 9 are
+ represented by the lowercase letters, the uppercase letters, @, and _,
+ in that order. If _\bb_\ba_\bs_\be is less than or equal to 36, lowercase and
+ uppercase letters may be used interchangeably to represent numbers
between 10 and 35.
- Operators are evaluated in order of precedence. Sub-expressions in
- parentheses are evaluated first and may override the precedence rules
+ Operators are evaluated in order of precedence. Sub-expressions in
+ parentheses are evaluated first and may override the precedence rules
above.
C\bCO\bON\bND\bDI\bIT\bTI\bIO\bON\bNA\bAL\bL E\bEX\bXP\bPR\bRE\bES\bSS\bSI\bIO\bON\bNS\bS
- Conditional expressions are used by the [\b[[\b[ compound command and the
- t\bte\bes\bst\bt and [\b[ builtin commands to test file attributes and perform string
- and arithmetic comparisons. Expressions are formed from the following
- unary or binary primaries. If any _\bf_\bi_\bl_\be argument to one of the pri-
+ Conditional expressions are used by the [\b[[\b[ compound command and the
+ t\bte\bes\bst\bt and [\b[ builtin commands to test file attributes and perform string
+ and arithmetic comparisons. Expressions are formed from the following
+ unary or binary primaries. If any _\bf_\bi_\bl_\be argument to one of the pri-
maries is of the form _\b/_\bd_\be_\bv_\b/_\bf_\bd_\b/_\bn, then file descriptor _\bn is checked. If
- the _\bf_\bi_\bl_\be argument to one of the primaries is one of _\b/_\bd_\be_\bv_\b/_\bs_\bt_\bd_\bi_\bn,
- _\b/_\bd_\be_\bv_\b/_\bs_\bt_\bd_\bo_\bu_\bt, or _\b/_\bd_\be_\bv_\b/_\bs_\bt_\bd_\be_\br_\br, file descriptor 0, 1, or 2, respectively,
+ the _\bf_\bi_\bl_\be argument to one of the primaries is one of _\b/_\bd_\be_\bv_\b/_\bs_\bt_\bd_\bi_\bn,
+ _\b/_\bd_\be_\bv_\b/_\bs_\bt_\bd_\bo_\bu_\bt, or _\b/_\bd_\be_\bv_\b/_\bs_\bt_\bd_\be_\br_\br, file descriptor 0, 1, or 2, respectively,
is checked.
Unless otherwise specified, primaries that operate on files follow sym-
bolic links and operate on the target of the link, rather than the link
itself.
- When used with [\b[[\b[, The <\b< and >\b> operators sort lexicographically using
- the current locale.
+ When used with [\b[[\b[, the <\b< and >\b> operators sort lexicographically using
+ the current locale. The t\bte\bes\bst\bt command sorts using ASCII ordering.
-\b-a\ba _\bf_\bi_\bl_\be
True if _\bf_\bi_\bl_\be exists.
-\b-L\bL _\bf_\bi_\bl_\be
True if _\bf_\bi_\bl_\be exists and is a symbolic link.
-\b-N\bN _\bf_\bi_\bl_\be
- True if _\bf_\bi_\bl_\be exists and has been modified since it was last
+ True if _\bf_\bi_\bl_\be exists and has been modified since it was last
read.
-\b-O\bO _\bf_\bi_\bl_\be
True if _\bf_\bi_\bl_\be exists and is owned by the effective user id.
-\b-S\bS _\bf_\bi_\bl_\be
True if _\bf_\bi_\bl_\be exists and is a socket.
_\bf_\bi_\bl_\be_\b1 -\b-e\bef\bf _\bf_\bi_\bl_\be_\b2
- True if _\bf_\bi_\bl_\be_\b1 and _\bf_\bi_\bl_\be_\b2 refer to the same device and inode num-
+ True if _\bf_\bi_\bl_\be_\b1 and _\bf_\bi_\bl_\be_\b2 refer to the same device and inode num-
bers.
_\bf_\bi_\bl_\be_\b1 -n\bnt\bt _\bf_\bi_\bl_\be_\b2
- True if _\bf_\bi_\bl_\be_\b1 is newer (according to modification date) than
+ True if _\bf_\bi_\bl_\be_\b1 is newer (according to modification date) than
_\bf_\bi_\bl_\be_\b2, or if _\bf_\bi_\bl_\be_\b1 exists and _\bf_\bi_\bl_\be_\b2 does not.
_\bf_\bi_\bl_\be_\b1 -o\bot\bt _\bf_\bi_\bl_\be_\b2
- True if _\bf_\bi_\bl_\be_\b1 is older than _\bf_\bi_\bl_\be_\b2, or if _\bf_\bi_\bl_\be_\b2 exists and _\bf_\bi_\bl_\be_\b1
+ True if _\bf_\bi_\bl_\be_\b1 is older than _\bf_\bi_\bl_\be_\b2, or if _\bf_\bi_\bl_\be_\b2 exists and _\bf_\bi_\bl_\be_\b1
does not.
-\b-o\bo _\bo_\bp_\bt_\bn_\ba_\bm_\be
- True if the shell option _\bo_\bp_\bt_\bn_\ba_\bm_\be is enabled. See the list of
- options under the description of the -\b-o\bo option to the s\bse\bet\bt
+ True if the shell option _\bo_\bp_\bt_\bn_\ba_\bm_\be is enabled. See the list of
+ options under the description of the -\b-o\bo option to the s\bse\bet\bt
builtin below.
-\b-v\bv _\bv_\ba_\br_\bn_\ba_\bm_\be
- True if the shell variable _\bv_\ba_\br_\bn_\ba_\bm_\be is set (has been assigned a
+ True if the shell variable _\bv_\ba_\br_\bn_\ba_\bm_\be is set (has been assigned a
value).
-\b-z\bz _\bs_\bt_\br_\bi_\bn_\bg
True if the length of _\bs_\bt_\br_\bi_\bn_\bg is zero.
_\bs_\bt_\br_\bi_\bn_\bg_\b1 =\b==\b= _\bs_\bt_\br_\bi_\bn_\bg_\b2
_\bs_\bt_\br_\bi_\bn_\bg_\b1 =\b= _\bs_\bt_\br_\bi_\bn_\bg_\b2
- True if the strings are equal. =\b= should be used with the t\bte\bes\bst\bt
+ True if the strings are equal. =\b= should be used with the t\bte\bes\bst\bt
command for POSIX conformance.
_\bs_\bt_\br_\bi_\bn_\bg_\b1 !\b!=\b= _\bs_\bt_\br_\bi_\bn_\bg_\b2
True if _\bs_\bt_\br_\bi_\bn_\bg_\b1 sorts after _\bs_\bt_\br_\bi_\bn_\bg_\b2 lexicographically.
_\ba_\br_\bg_\b1 O\bOP\bP _\ba_\br_\bg_\b2
- O\bOP\bP is one of -\b-e\beq\bq, -\b-n\bne\be, -\b-l\blt\bt, -\b-l\ble\be, -\b-g\bgt\bt, or -\b-g\bge\be. These arithmetic
- binary operators return true if _\ba_\br_\bg_\b1 is equal to, not equal to,
- less than, less than or equal to, greater than, or greater than
- or equal to _\ba_\br_\bg_\b2, respectively. _\bA_\br_\bg_\b1 and _\ba_\br_\bg_\b2 may be positive
+ O\bOP\bP is one of -\b-e\beq\bq, -\b-n\bne\be, -\b-l\blt\bt, -\b-l\ble\be, -\b-g\bgt\bt, or -\b-g\bge\be. These arithmetic
+ binary operators return true if _\ba_\br_\bg_\b1 is equal to, not equal to,
+ less than, less than or equal to, greater than, or greater than
+ or equal to _\ba_\br_\bg_\b2, respectively. _\bA_\br_\bg_\b1 and _\ba_\br_\bg_\b2 may be positive
or negative integers.
S\bSI\bIM\bMP\bPL\bLE\bE C\bCO\bOM\bMM\bMA\bAN\bND\bD E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN
- When a simple command is executed, the shell performs the following
+ When a simple command is executed, the shell performs the following
expansions, assignments, and redirections, from left to right.
- 1. The words that the parser has marked as variable assignments
- (those preceding the command name) and redirections are saved
+ 1. The words that the parser has marked as variable assignments
+ (those preceding the command name) and redirections are saved
for later processing.
- 2. The words that are not variable assignments or redirections are
- expanded. If any words remain after expansion, the first word
- is taken to be the name of the command and the remaining words
+ 2. The words that are not variable assignments or redirections are
+ expanded. If any words remain after expansion, the first word
+ is taken to be the name of the command and the remaining words
are the arguments.
3. Redirections are performed as described above under R\bRE\bED\bDI\bIR\bRE\bEC\bCT\bTI\bIO\bON\bN.
4. The text after the =\b= in each variable assignment undergoes tilde
expansion, parameter expansion, command substitution, arithmetic
- expansion, and quote removal before being assigned to the vari-
+ expansion, and quote removal before being assigned to the vari-
able.
If no command name results, the variable assignments affect the current
- shell environment. Otherwise, the variables are added to the environ-
- ment of the executed command and do not affect the current shell envi-
- ronment. If any of the assignments attempts to assign a value to a
- readonly variable, an error occurs, and the command exits with a non-
+ shell environment. Otherwise, the variables are added to the environ-
+ ment of the executed command and do not affect the current shell envi-
+ ronment. If any of the assignments attempts to assign a value to a
+ readonly variable, an error occurs, and the command exits with a non-
zero status.
- If no command name results, redirections are performed, but do not
- affect the current shell environment. A redirection error causes the
+ If no command name results, redirections are performed, but do not
+ affect the current shell environment. A redirection error causes the
command to exit with a non-zero status.
- If there is a command name left after expansion, execution proceeds as
- described below. Otherwise, the command exits. If one of the expan-
- sions contained a command substitution, the exit status of the command
- is the exit status of the last command substitution performed. If
+ If there is a command name left after expansion, execution proceeds as
+ described below. Otherwise, the command exits. If one of the expan-
+ sions contained a command substitution, the exit status of the command
+ is the exit status of the last command substitution performed. If
there were no command substitutions, the command exits with a status of
zero.
C\bCO\bOM\bMM\bMA\bAN\bND\bD E\bEX\bXE\bEC\bCU\bUT\bTI\bIO\bON\bN
- After a command has been split into words, if it results in a simple
- command and an optional list of arguments, the following actions are
+ After a command has been split into words, if it results in a simple
+ command and an optional list of arguments, the following actions are
taken.
- If the command name contains no slashes, the shell attempts to locate
- it. If there exists a shell function by that name, that function is
- invoked as described above in F\bFU\bUN\bNC\bCT\bTI\bIO\bON\bNS\bS. If the name does not match a
- function, the shell searches for it in the list of shell builtins. If
+ If the command name contains no slashes, the shell attempts to locate
+ it. If there exists a shell function by that name, that function is
+ invoked as described above in F\bFU\bUN\bNC\bCT\bTI\bIO\bON\bNS\bS. If the name does not match a
+ function, the shell searches for it in the list of shell builtins. If
a match is found, that builtin is invoked.
- If the name is neither a shell function nor a builtin, and contains no
- slashes, b\bba\bas\bsh\bh searches each element of the P\bPA\bAT\bTH\bH for a directory con-
- taining an executable file by that name. B\bBa\bas\bsh\bh uses a hash table to
- remember the full pathnames of executable files (see h\bha\bas\bsh\bh under S\bSH\bHE\bEL\bLL\bL
- B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). A full search of the directories in P\bPA\bAT\bTH\bH is
- performed only if the command is not found in the hash table. If the
+ If the name is neither a shell function nor a builtin, and contains no
+ slashes, b\bba\bas\bsh\bh searches each element of the P\bPA\bAT\bTH\bH for a directory con-
+ taining an executable file by that name. B\bBa\bas\bsh\bh uses a hash table to
+ remember the full pathnames of executable files (see h\bha\bas\bsh\bh under S\bSH\bHE\bEL\bLL\bL
+ B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). A full search of the directories in P\bPA\bAT\bTH\bH is
+ performed only if the command is not found in the hash table. If the
search is unsuccessful, the shell searches for a defined shell function
named c\bco\bom\bmm\bma\ban\bnd\bd_\b_n\bno\bot\bt_\b_f\bfo\bou\bun\bnd\bd_\b_h\bha\ban\bnd\bdl\ble\be. If that function exists, it is invoked
- with the original command and the original command's arguments as its
- arguments, and the function's exit status becomes the exit status of
- the shell. If that function is not defined, the shell prints an error
+ with the original command and the original command's arguments as its
+ arguments, and the function's exit status becomes the exit status of
+ the shell. If that function is not defined, the shell prints an error
message and returns an exit status of 127.
- If the search is successful, or if the command name contains one or
+ If the search is successful, or if the command name contains one or
more slashes, the shell executes the named program in a separate execu-
tion environment. Argument 0 is set to the name given, and the remain-
ing arguments to the command are set to the arguments given, if any.
- If this execution fails because the file is not in executable format,
- and the file is not a directory, it is assumed to be a _\bs_\bh_\be_\bl_\bl _\bs_\bc_\br_\bi_\bp_\bt, a
- file containing shell commands. A subshell is spawned to execute it.
- This subshell reinitializes itself, so that the effect is as if a new
- shell had been invoked to handle the script, with the exception that
- the locations of commands remembered by the parent (see h\bha\bas\bsh\bh below
+ If this execution fails because the file is not in executable format,
+ and the file is not a directory, it is assumed to be a _\bs_\bh_\be_\bl_\bl _\bs_\bc_\br_\bi_\bp_\bt, a
+ file containing shell commands. A subshell is spawned to execute it.
+ This subshell reinitializes itself, so that the effect is as if a new
+ shell had been invoked to handle the script, with the exception that
+ the locations of commands remembered by the parent (see h\bha\bas\bsh\bh below
under S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS) are retained by the child.
- If the program is a file beginning with #\b#!\b!, the remainder of the first
- line specifies an interpreter for the program. The shell executes the
+ If the program is a file beginning with #\b#!\b!, the remainder of the first
+ line specifies an interpreter for the program. The shell executes the
specified interpreter on operating systems that do not handle this exe-
cutable format themselves. The arguments to the interpreter consist of
- a single optional argument following the interpreter name on the first
- line of the program, followed by the name of the program, followed by
+ a single optional argument following the interpreter name on the first
+ line of the program, followed by the name of the program, followed by
the command arguments, if any.
C\bCO\bOM\bMM\bMA\bAN\bND\bD E\bEX\bXE\bEC\bCU\bUT\bTI\bIO\bON\bN E\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
- The shell has an _\be_\bx_\be_\bc_\bu_\bt_\bi_\bo_\bn _\be_\bn_\bv_\bi_\br_\bo_\bn_\bm_\be_\bn_\bt, which consists of the follow-
+ The shell has an _\be_\bx_\be_\bc_\bu_\bt_\bi_\bo_\bn _\be_\bn_\bv_\bi_\br_\bo_\bn_\bm_\be_\bn_\bt, which consists of the follow-
ing:
- +\bo open files inherited by the shell at invocation, as modified by
+ +\bo open files inherited by the shell at invocation, as modified by
redirections supplied to the e\bex\bxe\bec\bc builtin
- +\bo the current working directory as set by c\bcd\bd, p\bpu\bus\bsh\bhd\bd, or p\bpo\bop\bpd\bd, or
+ +\bo the current working directory as set by c\bcd\bd, p\bpu\bus\bsh\bhd\bd, or p\bpo\bop\bpd\bd, or
inherited by the shell at invocation
- +\bo the file creation mode mask as set by u\bum\bma\bas\bsk\bk or inherited from
+ +\bo the file creation mode mask as set by u\bum\bma\bas\bsk\bk or inherited from
the shell's parent
+\bo current traps set by t\btr\bra\bap\bp
+\bo shell parameters that are set by variable assignment or with s\bse\bet\bt
or inherited from the shell's parent in the environment
- +\bo shell functions defined during execution or inherited from the
+ +\bo shell functions defined during execution or inherited from the
shell's parent in the environment
- +\bo options enabled at invocation (either by default or with com-
+ +\bo options enabled at invocation (either by default or with com-
mand-line arguments) or by s\bse\bet\bt
+\bo options enabled by s\bsh\bho\bop\bpt\bt
+\bo shell aliases defined with a\bal\bli\bia\bas\bs
- +\bo various process IDs, including those of background jobs, the
+ +\bo various process IDs, including those of background jobs, the
value of $\b$$\b$, and the value of P\bPP\bPI\bID\bD
- When a simple command other than a builtin or shell function is to be
- executed, it is invoked in a separate execution environment that con-
- sists of the following. Unless otherwise noted, the values are inher-
+ When a simple command other than a builtin or shell function is to be
+ executed, it is invoked in a separate execution environment that con-
+ sists of the following. Unless otherwise noted, the values are inher-
ited from the shell.
- +\bo the shell's open files, plus any modifications and additions
+ +\bo the shell's open files, plus any modifications and additions
specified by redirections to the command
+\bo the current working directory
+\bo the file creation mode mask
- +\bo shell variables and functions marked for export, along with
+ +\bo shell variables and functions marked for export, along with
variables exported for the command, passed in the environment
+\bo traps caught by the shell are reset to the values inherited from
the shell's parent, and traps ignored by the shell are ignored
- A command invoked in this separate environment cannot affect the
+ A command invoked in this separate environment cannot affect the
shell's execution environment.
- Command substitution, commands grouped with parentheses, and asynchro-
+ Command substitution, commands grouped with parentheses, and asynchro-
nous commands are invoked in a subshell environment that is a duplicate
- of the shell environment, except that traps caught by the shell are
+ of the shell environment, except that traps caught by the shell are
reset to the values that the shell inherited from its parent at invoca-
tion. Builtin commands that are invoked as part of a pipeline are also
executed in a subshell environment. Changes made to the subshell envi-
ronment cannot affect the shell's execution environment.
Subshells spawned to execute command substitutions inherit the value of
- the -\b-e\be option from the parent shell. When not in _\bp_\bo_\bs_\bi_\bx mode, b\bba\bas\bsh\bh
+ the -\b-e\be option from the parent shell. When not in _\bp_\bo_\bs_\bi_\bx mode, b\bba\bas\bsh\bh
clears the -\b-e\be option in such subshells.
- If a command is followed by a &\b& and job control is not active, the
- default standard input for the command is the empty file _\b/_\bd_\be_\bv_\b/_\bn_\bu_\bl_\bl.
- Otherwise, the invoked command inherits the file descriptors of the
+ If a command is followed by a &\b& and job control is not active, the
+ default standard input for the command is the empty file _\b/_\bd_\be_\bv_\b/_\bn_\bu_\bl_\bl.
+ Otherwise, the invoked command inherits the file descriptors of the
calling shell as modified by redirections.
E\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
- When a program is invoked it is given an array of strings called the
+ When a program is invoked it is given an array of strings called the
_\be_\bn_\bv_\bi_\br_\bo_\bn_\bm_\be_\bn_\bt. This is a list of _\bn_\ba_\bm_\be-_\bv_\ba_\bl_\bu_\be pairs, of the form
_\bn_\ba_\bm_\be=_\bv_\ba_\bl_\bu_\be.
- The shell provides several ways to manipulate the environment. On
+ The shell provides several ways to manipulate the environment. On
invocation, the shell scans its own environment and creates a parameter
- for each name found, automatically marking it for _\be_\bx_\bp_\bo_\br_\bt to child pro-
- cesses. Executed commands inherit the environment. The e\bex\bxp\bpo\bor\brt\bt and
- d\bde\bec\bcl\bla\bar\bre\be -\b-x\bx commands allow parameters and functions to be added to and
+ for each name found, automatically marking it for _\be_\bx_\bp_\bo_\br_\bt to child pro-
+ cesses. Executed commands inherit the environment. The e\bex\bxp\bpo\bor\brt\bt and
+ d\bde\bec\bcl\bla\bar\bre\be -\b-x\bx commands allow parameters and functions to be added to and
deleted from the environment. If the value of a parameter in the envi-
- ronment is modified, the new value becomes part of the environment,
- replacing the old. The environment inherited by any executed command
- consists of the shell's initial environment, whose values may be modi-
- fied in the shell, less any pairs removed by the u\bun\bns\bse\bet\bt command, plus
+ ronment is modified, the new value becomes part of the environment,
+ replacing the old. The environment inherited by any executed command
+ consists of the shell's initial environment, whose values may be modi-
+ fied in the shell, less any pairs removed by the u\bun\bns\bse\bet\bt command, plus
any additions via the e\bex\bxp\bpo\bor\brt\bt and d\bde\bec\bcl\bla\bar\bre\be -\b-x\bx commands.
- The environment for any _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd or function may be augmented
- temporarily by prefixing it with parameter assignments, as described
+ The environment for any _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd or function may be augmented
+ temporarily by prefixing it with parameter assignments, as described
above in P\bPA\bAR\bRA\bAM\bME\bET\bTE\bER\bRS\bS. These assignment statements affect only the envi-
ronment seen by that command.
- If the -\b-k\bk option is set (see the s\bse\bet\bt builtin command below), then _\ba_\bl_\bl
- parameter assignments are placed in the environment for a command, not
+ If the -\b-k\bk option is set (see the s\bse\bet\bt builtin command below), then _\ba_\bl_\bl
+ parameter assignments are placed in the environment for a command, not
just those that precede the command name.
- When b\bba\bas\bsh\bh invokes an external command, the variable _\b_ is set to the
- full file name of the command and passed to that command in its envi-
+ When b\bba\bas\bsh\bh invokes an external command, the variable _\b_ is set to the
+ full file name of the command and passed to that command in its envi-
ronment.
E\bEX\bXI\bIT\bT S\bST\bTA\bAT\bTU\bUS\bS
- The exit status of an executed command is the value returned by the
+ The exit status of an executed command is the value returned by the
_\bw_\ba_\bi_\bt_\bp_\bi_\bd system call or equivalent function. Exit statuses fall between
- 0 and 255, though, as explained below, the shell may use values above
+ 0 and 255, though, as explained below, the shell may use values above
125 specially. Exit statuses from shell builtins and compound commands
- are also limited to this range. Under certain circumstances, the shell
+ are also limited to this range. Under certain circumstances, the shell
will use special values to indicate specific failure modes.
For the shell's purposes, a command which exits with a zero exit status
- has succeeded. An exit status of zero indicates success. A non-zero
- exit status indicates failure. When a command terminates on a fatal
+ has succeeded. An exit status of zero indicates success. A non-zero
+ exit status indicates failure. When a command terminates on a fatal
signal _\bN, b\bba\bas\bsh\bh uses the value of 128+_\bN as the exit status.
- If a command is not found, the child process created to execute it
- returns a status of 127. If a command is found but is not executable,
+ If a command is not found, the child process created to execute it
+ returns a status of 127. If a command is found but is not executable,
the return status is 126.
If a command fails because of an error during expansion or redirection,
the exit status is greater than zero.
- Shell builtin commands return a status of 0 (_\bt_\br_\bu_\be) if successful, and
- non-zero (_\bf_\ba_\bl_\bs_\be) if an error occurs while they execute. All builtins
+ Shell builtin commands return a status of 0 (_\bt_\br_\bu_\be) if successful, and
+ non-zero (_\bf_\ba_\bl_\bs_\be) if an error occurs while they execute. All builtins
return an exit status of 2 to indicate incorrect usage.
- B\bBa\bas\bsh\bh itself returns the exit status of the last command executed,
- unless a syntax error occurs, in which case it exits with a non-zero
+ B\bBa\bas\bsh\bh itself returns the exit status of the last command executed,
+ unless a syntax error occurs, in which case it exits with a non-zero
value. See also the e\bex\bxi\bit\bt builtin command below.
S\bSI\bIG\bGN\bNA\bAL\bLS\bS
- When b\bba\bas\bsh\bh is interactive, in the absence of any traps, it ignores
+ When b\bba\bas\bsh\bh is interactive, in the absence of any traps, it ignores
S\bSI\bIG\bGT\bTE\bER\bRM\bM (so that k\bki\bil\bll\bl 0\b0 does not kill an interactive shell), and S\bSI\bIG\bGI\bIN\bNT\bT
- is caught and handled (so that the w\bwa\bai\bit\bt builtin is interruptible). In
- all cases, b\bba\bas\bsh\bh ignores S\bSI\bIG\bGQ\bQU\bUI\bIT\bT. If job control is in effect, b\bba\bas\bsh\bh
+ is caught and handled (so that the w\bwa\bai\bit\bt builtin is interruptible). In
+ all cases, b\bba\bas\bsh\bh ignores S\bSI\bIG\bGQ\bQU\bUI\bIT\bT. If job control is in effect, b\bba\bas\bsh\bh
ignores S\bSI\bIG\bGT\bTT\bTI\bIN\bN, S\bSI\bIG\bGT\bTT\bTO\bOU\bU, and S\bSI\bIG\bGT\bTS\bST\bTP\bP.
Non-builtin commands run by b\bba\bas\bsh\bh have signal handlers set to the values
- inherited by the shell from its parent. When job control is not in
- effect, asynchronous commands ignore S\bSI\bIG\bGI\bIN\bNT\bT and S\bSI\bIG\bGQ\bQU\bUI\bIT\bT in addition to
- these inherited handlers. Commands run as a result of command substi-
+ inherited by the shell from its parent. When job control is not in
+ effect, asynchronous commands ignore S\bSI\bIG\bGI\bIN\bNT\bT and S\bSI\bIG\bGQ\bQU\bUI\bIT\bT in addition to
+ these inherited handlers. Commands run as a result of command substi-
tution ignore the keyboard-generated job control signals S\bSI\bIG\bGT\bTT\bTI\bIN\bN, S\bSI\bIG\bGT\bT-\b-
T\bTO\bOU\bU, and S\bSI\bIG\bGT\bTS\bST\bTP\bP.
- The shell exits by default upon receipt of a S\bSI\bIG\bGH\bHU\bUP\bP. Before exiting,
- an interactive shell resends the S\bSI\bIG\bGH\bHU\bUP\bP to all jobs, running or
+ The shell exits by default upon receipt of a S\bSI\bIG\bGH\bHU\bUP\bP. Before exiting,
+ an interactive shell resends the S\bSI\bIG\bGH\bHU\bUP\bP to all jobs, running or
stopped. Stopped jobs are sent S\bSI\bIG\bGC\bCO\bON\bNT\bT to ensure that they receive the
- S\bSI\bIG\bGH\bHU\bUP\bP. To prevent the shell from sending the signal to a particular
- job, it should be removed from the jobs table with the d\bdi\bis\bso\bow\bwn\bn builtin
- (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below) or marked to not receive S\bSI\bIG\bGH\bHU\bUP\bP
+ S\bSI\bIG\bGH\bHU\bUP\bP. To prevent the shell from sending the signal to a particular
+ job, it should be removed from the jobs table with the d\bdi\bis\bso\bow\bwn\bn builtin
+ (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below) or marked to not receive S\bSI\bIG\bGH\bHU\bUP\bP
using d\bdi\bis\bso\bow\bwn\bn -\b-h\bh.
- If the h\bhu\bup\bpo\bon\bne\bex\bxi\bit\bt shell option has been set with s\bsh\bho\bop\bpt\bt, b\bba\bas\bsh\bh sends a
+ If the h\bhu\bup\bpo\bon\bne\bex\bxi\bit\bt shell option has been set with s\bsh\bho\bop\bpt\bt, b\bba\bas\bsh\bh sends a
S\bSI\bIG\bGH\bHU\bUP\bP to all jobs when an interactive login shell exits.
- If b\bba\bas\bsh\bh is waiting for a command to complete and receives a signal for
+ If b\bba\bas\bsh\bh is waiting for a command to complete and receives a signal for
which a trap has been set, the trap will not be executed until the com-
- mand completes. When b\bba\bas\bsh\bh is waiting for an asynchronous command via
- the w\bwa\bai\bit\bt builtin, the reception of a signal for which a trap has been
+ mand completes. When b\bba\bas\bsh\bh is waiting for an asynchronous command via
+ the w\bwa\bai\bit\bt builtin, the reception of a signal for which a trap has been
set will cause the w\bwa\bai\bit\bt builtin to return immediately with an exit sta-
tus greater than 128, immediately after which the trap is executed.
J\bJO\bOB\bB C\bCO\bON\bNT\bTR\bRO\bOL\bL
- _\bJ_\bo_\bb _\bc_\bo_\bn_\bt_\br_\bo_\bl refers to the ability to selectively stop (_\bs_\bu_\bs_\bp_\be_\bn_\bd) the
+ _\bJ_\bo_\bb _\bc_\bo_\bn_\bt_\br_\bo_\bl refers to the ability to selectively stop (_\bs_\bu_\bs_\bp_\be_\bn_\bd) the
execution of processes and continue (_\br_\be_\bs_\bu_\bm_\be) their execution at a later
- point. A user typically employs this facility via an interactive
- interface supplied jointly by the operating system kernel's terminal
+ point. A user typically employs this facility via an interactive
+ interface supplied jointly by the operating system kernel's terminal
driver and b\bba\bas\bsh\bh.
- The shell associates a _\bj_\bo_\bb with each pipeline. It keeps a table of
- currently executing jobs, which may be listed with the j\bjo\bob\bbs\bs command.
- When b\bba\bas\bsh\bh starts a job asynchronously (in the _\bb_\ba_\bc_\bk_\bg_\br_\bo_\bu_\bn_\bd), it prints a
+ The shell associates a _\bj_\bo_\bb with each pipeline. It keeps a table of
+ currently executing jobs, which may be listed with the j\bjo\bob\bbs\bs command.
+ When b\bba\bas\bsh\bh starts a job asynchronously (in the _\bb_\ba_\bc_\bk_\bg_\br_\bo_\bu_\bn_\bd), it prints a
line that looks like:
[1] 25647
indicating that this job is job number 1 and that the process ID of the
last process in the pipeline associated with this job is 25647. All of
- the processes in a single pipeline are members of the same job. B\bBa\bas\bsh\bh
+ the processes in a single pipeline are members of the same job. B\bBa\bas\bsh\bh
uses the _\bj_\bo_\bb abstraction as the basis for job control.
- To facilitate the implementation of the user interface to job control,
+ To facilitate the implementation of the user interface to job control,
the operating system maintains the notion of a _\bc_\bu_\br_\br_\be_\bn_\bt _\bt_\be_\br_\bm_\bi_\bn_\ba_\bl _\bp_\br_\bo_\bc_\be_\bs_\bs
_\bg_\br_\bo_\bu_\bp _\bI_\bD. Members of this process group (processes whose process group
ID is equal to the current terminal process group ID) receive keyboard-
- generated signals such as S\bSI\bIG\bGI\bIN\bNT\bT. These processes are said to be in
- the _\bf_\bo_\br_\be_\bg_\br_\bo_\bu_\bn_\bd. _\bB_\ba_\bc_\bk_\bg_\br_\bo_\bu_\bn_\bd processes are those whose process group ID
+ generated signals such as S\bSI\bIG\bGI\bIN\bNT\bT. These processes are said to be in
+ the _\bf_\bo_\br_\be_\bg_\br_\bo_\bu_\bn_\bd. _\bB_\ba_\bc_\bk_\bg_\br_\bo_\bu_\bn_\bd processes are those whose process group ID
differs from the terminal's; such processes are immune to keyboard-gen-
erated signals. Only foreground processes are allowed to read from or,
- if the user so specifies with stty tostop, write to the terminal.
- Background processes which attempt to read from (write to when stty
- tostop is in effect) the terminal are sent a S\bSI\bIG\bGT\bTT\bTI\bIN\bN (\b(S\bSI\bIG\bGT\bTT\bTO\bOU\bU)\b) signal
- by the kernel's terminal driver, which, unless caught, suspends the
+ if the user so specifies with stty tostop, write to the terminal.
+ Background processes which attempt to read from (write to when stty
+ tostop is in effect) the terminal are sent a S\bSI\bIG\bGT\bTT\bTI\bIN\bN (\b(S\bSI\bIG\bGT\bTT\bTO\bOU\bU)\b) signal
+ by the kernel's terminal driver, which, unless caught, suspends the
process.
- If the operating system on which b\bba\bas\bsh\bh is running supports job control,
+ If the operating system on which b\bba\bas\bsh\bh is running supports job control,
b\bba\bas\bsh\bh contains facilities to use it. Typing the _\bs_\bu_\bs_\bp_\be_\bn_\bd character (typ-
ically ^\b^Z\bZ, Control-Z) while a process is running causes that process to
- be stopped and returns control to b\bba\bas\bsh\bh. Typing the _\bd_\be_\bl_\ba_\by_\be_\bd _\bs_\bu_\bs_\bp_\be_\bn_\bd
- character (typically ^\b^Y\bY, Control-Y) causes the process to be stopped
- when it attempts to read input from the terminal, and control to be
- returned to b\bba\bas\bsh\bh. The user may then manipulate the state of this job,
- using the b\bbg\bg command to continue it in the background, the f\bfg\bg command
+ be stopped and returns control to b\bba\bas\bsh\bh. Typing the _\bd_\be_\bl_\ba_\by_\be_\bd _\bs_\bu_\bs_\bp_\be_\bn_\bd
+ character (typically ^\b^Y\bY, Control-Y) causes the process to be stopped
+ when it attempts to read input from the terminal, and control to be
+ returned to b\bba\bas\bsh\bh. The user may then manipulate the state of this job,
+ using the b\bbg\bg command to continue it in the background, the f\bfg\bg command
to continue it in the foreground, or the k\bki\bil\bll\bl command to kill it. A ^\b^Z\bZ
takes effect immediately, and has the additional side effect of causing
pending output and typeahead to be discarded.
There are a number of ways to refer to a job in the shell. The charac-
- ter %\b% introduces a job specification (_\bj_\bo_\bb_\bs_\bp_\be_\bc). Job number _\bn may be
+ ter %\b% introduces a job specification (_\bj_\bo_\bb_\bs_\bp_\be_\bc). Job number _\bn may be
referred to as %\b%n\bn. A job may also be referred to using a prefix of the
name used to start it, or using a substring that appears in its command
- line. For example, %\b%c\bce\be refers to a stopped c\bce\be job. If a prefix
- matches more than one job, b\bba\bas\bsh\bh reports an error. Using %\b%?\b?c\bce\be, on the
- other hand, refers to any job containing the string c\bce\be in its command
- line. If the substring matches more than one job, b\bba\bas\bsh\bh reports an
- error. The symbols %\b%%\b% and %\b%+\b+ refer to the shell's notion of the _\bc_\bu_\br_\b-
- _\br_\be_\bn_\bt _\bj_\bo_\bb, which is the last job stopped while it was in the foreground
+ line. For example, %\b%c\bce\be refers to a stopped c\bce\be job. If a prefix
+ matches more than one job, b\bba\bas\bsh\bh reports an error. Using %\b%?\b?c\bce\be, on the
+ other hand, refers to any job containing the string c\bce\be in its command
+ line. If the substring matches more than one job, b\bba\bas\bsh\bh reports an
+ error. The symbols %\b%%\b% and %\b%+\b+ refer to the shell's notion of the _\bc_\bu_\br_\b-
+ _\br_\be_\bn_\bt _\bj_\bo_\bb, which is the last job stopped while it was in the foreground
or started in the background. The _\bp_\br_\be_\bv_\bi_\bo_\bu_\bs _\bj_\bo_\bb may be referenced using
%\b%-\b-. If there is only a single job, %\b%+\b+ and %\b%-\b- can both be used to refer
- to that job. In output pertaining to jobs (e.g., the output of the
+ to that job. In output pertaining to jobs (e.g., the output of the
j\bjo\bob\bbs\bs command), the current job is always flagged with a +\b+, and the pre-
- vious job with a -\b-. A single % (with no accompanying job specifica-
+ vious job with a -\b-. A single % (with no accompanying job specifica-
tion) also refers to the current job.
- Simply naming a job can be used to bring it into the foreground: %\b%1\b1 is
- a synonym for `\b``\b`f\bfg\bg %\b%1\b1'\b''\b', bringing job 1 from the background into the
- foreground. Similarly, `\b``\b`%\b%1\b1 &\b&'\b''\b' resumes job 1 in the background,
+ Simply naming a job can be used to bring it into the foreground: %\b%1\b1 is
+ a synonym for `\b``\b`f\bfg\bg %\b%1\b1'\b''\b', bringing job 1 from the background into the
+ foreground. Similarly, `\b``\b`%\b%1\b1 &\b&'\b''\b' resumes job 1 in the background,
equivalent to `\b``\b`b\bbg\bg %\b%1\b1'\b''\b'.
- The shell learns immediately whenever a job changes state. Normally,
+ The shell learns immediately whenever a job changes state. Normally,
b\bba\bas\bsh\bh waits until it is about to print a prompt before reporting changes
- in a job's status so as to not interrupt any other output. If the -\b-b\bb
+ in a job's status so as to not interrupt any other output. If the -\b-b\bb
option to the s\bse\bet\bt builtin command is enabled, b\bba\bas\bsh\bh reports such changes
- immediately. Any trap on S\bSI\bIG\bGC\bCH\bHL\bLD\bD is executed for each child that
+ immediately. Any trap on S\bSI\bIG\bGC\bCH\bHL\bLD\bD is executed for each child that
exits.
- If an attempt to exit b\bba\bas\bsh\bh is made while jobs are stopped (or, if the
- c\bch\bhe\bec\bck\bkj\bjo\bob\bbs\bs shell option has been enabled using the s\bsh\bho\bop\bpt\bt builtin, run-
+ If an attempt to exit b\bba\bas\bsh\bh is made while jobs are stopped (or, if the
+ c\bch\bhe\bec\bck\bkj\bjo\bob\bbs\bs shell option has been enabled using the s\bsh\bho\bop\bpt\bt builtin, run-
ning), the shell prints a warning message, and, if the c\bch\bhe\bec\bck\bkj\bjo\bob\bbs\bs option
- is enabled, lists the jobs and their statuses. The j\bjo\bob\bbs\bs command may
- then be used to inspect their status. If a second attempt to exit is
- made without an intervening command, the shell does not print another
+ is enabled, lists the jobs and their statuses. The j\bjo\bob\bbs\bs command may
+ then be used to inspect their status. If a second attempt to exit is
+ made without an intervening command, the shell does not print another
warning, and any stopped jobs are terminated.
P\bPR\bRO\bOM\bMP\bPT\bTI\bIN\bNG\bG
When executing interactively, b\bba\bas\bsh\bh displays the primary prompt P\bPS\bS1\b1 when
- it is ready to read a command, and the secondary prompt P\bPS\bS2\b2 when it
- needs more input to complete a command. B\bBa\bas\bsh\bh allows these prompt
- strings to be customized by inserting a number of backslash-escaped
+ it is ready to read a command, and the secondary prompt P\bPS\bS2\b2 when it
+ needs more input to complete a command. B\bBa\bas\bsh\bh allows these prompt
+ strings to be customized by inserting a number of backslash-escaped
special characters that are decoded as follows:
\\b\a\ba an ASCII bell character (07)
- \\b\d\bd the date in "Weekday Month Date" format (e.g., "Tue May
+ \\b\d\bd the date in "Weekday Month Date" format (e.g., "Tue May
26")
\\b\D\bD{\b{_\bf_\bo_\br_\bm_\ba_\bt}\b}
- the _\bf_\bo_\br_\bm_\ba_\bt is passed to _\bs_\bt_\br_\bf_\bt_\bi_\bm_\be(3) and the result is
- inserted into the prompt string; an empty _\bf_\bo_\br_\bm_\ba_\bt results
+ the _\bf_\bo_\br_\bm_\ba_\bt is passed to _\bs_\bt_\br_\bf_\bt_\bi_\bm_\be(3) and the result is
+ inserted into the prompt string; an empty _\bf_\bo_\br_\bm_\ba_\bt results
in a locale-specific time representation. The braces are
required
\\b\e\be an ASCII escape character (033)
\\b\l\bl the basename of the shell's terminal device name
\\b\n\bn newline
\\b\r\br carriage return
- \\b\s\bs the name of the shell, the basename of $\b$0\b0 (the portion
+ \\b\s\bs the name of the shell, the basename of $\b$0\b0 (the portion
following the final slash)
\\b\t\bt the current time in 24-hour HH:MM:SS format
\\b\T\bT the current time in 12-hour HH:MM:SS format
\\b\u\bu the username of the current user
\\b\v\bv the version of b\bba\bas\bsh\bh (e.g., 2.00)
\\b\V\bV the release of b\bba\bas\bsh\bh, version + patch level (e.g., 2.00.0)
- \\b\w\bw the current working directory, with $\b$H\bHO\bOM\bME\bE abbreviated
- with a tilde (uses the value of the P\bPR\bRO\bOM\bMP\bPT\bT_\b_D\bDI\bIR\bRT\bTR\bRI\bIM\bM vari-
+ \\b\w\bw the current working directory, with $\b$H\bHO\bOM\bME\bE abbreviated
+ with a tilde (uses the value of the P\bPR\bRO\bOM\bMP\bPT\bT_\b_D\bDI\bIR\bRT\bTR\bRI\bIM\bM vari-
able)
\\b\W\bW the basename of the current working directory, with $\b$H\bHO\bOM\bME\bE
abbreviated with a tilde
\\b\$\b$ if the effective UID is 0, a #\b#, otherwise a $\b$
\\b\_\bn_\bn_\bn the character corresponding to the octal number _\bn_\bn_\bn
\\b\\\b\ a backslash
- \\b\[\b[ begin a sequence of non-printing characters, which could
- be used to embed a terminal control sequence into the
+ \\b\[\b[ begin a sequence of non-printing characters, which could
+ be used to embed a terminal control sequence into the
prompt
\\b\]\b] end a sequence of non-printing characters
- The command number and the history number are usually different: the
- history number of a command is its position in the history list, which
- may include commands restored from the history file (see H\bHI\bIS\bST\bTO\bOR\bRY\bY
- below), while the command number is the position in the sequence of
- commands executed during the current shell session. After the string
- is decoded, it is expanded via parameter expansion, command substitu-
- tion, arithmetic expansion, and quote removal, subject to the value of
- the p\bpr\bro\bom\bmp\bpt\btv\bva\bar\brs\bs shell option (see the description of the s\bsh\bho\bop\bpt\bt command
+ The command number and the history number are usually different: the
+ history number of a command is its position in the history list, which
+ may include commands restored from the history file (see H\bHI\bIS\bST\bTO\bOR\bRY\bY
+ below), while the command number is the position in the sequence of
+ commands executed during the current shell session. After the string
+ is decoded, it is expanded via parameter expansion, command substitu-
+ tion, arithmetic expansion, and quote removal, subject to the value of
+ the p\bpr\bro\bom\bmp\bpt\btv\bva\bar\brs\bs shell option (see the description of the s\bsh\bho\bop\bpt\bt command
under S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE
- This is the library that handles reading input when using an interac-
+ This is the library that handles reading input when using an interac-
tive shell, unless the -\b--\b-n\bno\boe\bed\bdi\bit\bti\bin\bng\bg option is given at shell invocation.
Line editing is also used when using the -\b-e\be option to the r\bre\bea\bad\bd builtin.
By default, the line editing commands are similar to those of Emacs. A
vi-style line editing interface is also available. Line editing can be
- enabled at any time using the -\b-o\bo e\bem\bma\bac\bcs\bs or -\b-o\bo v\bvi\bi options to the s\bse\bet\bt
- builtin (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). To turn off line editing
- after the shell is running, use the +\b+o\bo e\bem\bma\bac\bcs\bs or +\b+o\bo v\bvi\bi options to the
+ enabled at any time using the -\b-o\bo e\bem\bma\bac\bcs\bs or -\b-o\bo v\bvi\bi options to the s\bse\bet\bt
+ builtin (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). To turn off line editing
+ after the shell is running, use the +\b+o\bo e\bem\bma\bac\bcs\bs or +\b+o\bo v\bvi\bi options to the
s\bse\bet\bt builtin.
R\bRe\bea\bad\bdl\bli\bin\bne\be N\bNo\bot\bta\bat\bti\bio\bon\bn
In this section, the Emacs-style notation is used to denote keystrokes.
- Control keys are denoted by C-_\bk_\be_\by, e.g., C-n means Control-N. Simi-
- larly, _\bm_\be_\bt_\ba keys are denoted by M-_\bk_\be_\by, so M-x means Meta-X. (On key-
- boards without a _\bm_\be_\bt_\ba key, M-_\bx means ESC _\bx, i.e., press the Escape key
+ Control keys are denoted by C-_\bk_\be_\by, e.g., C-n means Control-N. Simi-
+ larly, _\bm_\be_\bt_\ba keys are denoted by M-_\bk_\be_\by, so M-x means Meta-X. (On key-
+ boards without a _\bm_\be_\bt_\ba key, M-_\bx means ESC _\bx, i.e., press the Escape key
then the _\bx key. This makes ESC the _\bm_\be_\bt_\ba _\bp_\br_\be_\bf_\bi_\bx. The combination M-C-_\bx
- means ESC-Control-_\bx, or press the Escape key then hold the Control key
+ means ESC-Control-_\bx, or press the Escape key then hold the Control key
while pressing the _\bx key.)
Readline commands may be given numeric _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs, which normally act as
- a repeat count. Sometimes, however, it is the sign of the argument
- that is significant. Passing a negative argument to a command that
- acts in the forward direction (e.g., k\bki\bil\bll\bl-\b-l\bli\bin\bne\be) causes that command to
- act in a backward direction. Commands whose behavior with arguments
+ a repeat count. Sometimes, however, it is the sign of the argument
+ that is significant. Passing a negative argument to a command that
+ acts in the forward direction (e.g., k\bki\bil\bll\bl-\b-l\bli\bin\bne\be) causes that command to
+ act in a backward direction. Commands whose behavior with arguments
deviates from this are noted below.
- When a command is described as _\bk_\bi_\bl_\bl_\bi_\bn_\bg text, the text deleted is saved
+ When a command is described as _\bk_\bi_\bl_\bl_\bi_\bn_\bg text, the text deleted is saved
for possible future retrieval (_\by_\ba_\bn_\bk_\bi_\bn_\bg). The killed text is saved in a
_\bk_\bi_\bl_\bl _\br_\bi_\bn_\bg. Consecutive kills cause the text to be accumulated into one
unit, which can be yanked all at once. Commands which do not kill text
separate the chunks of text on the kill ring.
R\bRe\bea\bad\bdl\bli\bin\bne\be I\bIn\bni\bit\bti\bia\bal\bli\biz\bza\bat\bti\bio\bon\bn
- Readline is customized by putting commands in an initialization file
- (the _\bi_\bn_\bp_\bu_\bt_\br_\bc file). The name of this file is taken from the value of
- the I\bIN\bNP\bPU\bUT\bTR\bRC\bC variable. If that variable is unset, the default is
- _\b~_\b/_\b._\bi_\bn_\bp_\bu_\bt_\br_\bc. When a program which uses the readline library starts up,
+ Readline is customized by putting commands in an initialization file
+ (the _\bi_\bn_\bp_\bu_\bt_\br_\bc file). The name of this file is taken from the value of
+ the I\bIN\bNP\bPU\bUT\bTR\bRC\bC variable. If that variable is unset, the default is
+ _\b~_\b/_\b._\bi_\bn_\bp_\bu_\bt_\br_\bc. When a program which uses the readline library starts up,
the initialization file is read, and the key bindings and variables are
- set. There are only a few basic constructs allowed in the readline
- initialization file. Blank lines are ignored. Lines beginning with a
- #\b# are comments. Lines beginning with a $\b$ indicate conditional con-
+ set. There are only a few basic constructs allowed in the readline
+ initialization file. Blank lines are ignored. Lines beginning with a
+ #\b# are comments. Lines beginning with a $\b$ indicate conditional con-
structs. Other lines denote key bindings and variable settings.
- The default key-bindings may be changed with an _\bi_\bn_\bp_\bu_\bt_\br_\bc file. Other
+ The default key-bindings may be changed with an _\bi_\bn_\bp_\bu_\bt_\br_\bc file. Other
programs that use this library may add their own commands and bindings.
For example, placing
M-Control-u: universal-argument
or
C-Meta-u: universal-argument
- into the _\bi_\bn_\bp_\bu_\bt_\br_\bc would make M-C-u execute the readline command _\bu_\bn_\bi_\bv_\be_\br_\b-
+ into the _\bi_\bn_\bp_\bu_\bt_\br_\bc would make M-C-u execute the readline command _\bu_\bn_\bi_\bv_\be_\br_\b-
_\bs_\ba_\bl_\b-_\ba_\br_\bg_\bu_\bm_\be_\bn_\bt.
- The following symbolic character names are recognized: _\bR_\bU_\bB_\bO_\bU_\bT, _\bD_\bE_\bL,
+ The following symbolic character names are recognized: _\bR_\bU_\bB_\bO_\bU_\bT, _\bD_\bE_\bL,
_\bE_\bS_\bC, _\bL_\bF_\bD, _\bN_\bE_\bW_\bL_\bI_\bN_\bE, _\bR_\bE_\bT, _\bR_\bE_\bT_\bU_\bR_\bN, _\bS_\bP_\bC, _\bS_\bP_\bA_\bC_\bE, and _\bT_\bA_\bB.
- In addition to command names, readline allows keys to be bound to a
+ In addition to command names, readline allows keys to be bound to a
string that is inserted when the key is pressed (a _\bm_\ba_\bc_\br_\bo).
R\bRe\bea\bad\bdl\bli\bin\bne\be K\bKe\bey\by B\bBi\bin\bnd\bdi\bin\bng\bgs\bs
- The syntax for controlling key bindings in the _\bi_\bn_\bp_\bu_\bt_\br_\bc file is simple.
- All that is required is the name of the command or the text of a macro
- and a key sequence to which it should be bound. The name may be speci-
+ The syntax for controlling key bindings in the _\bi_\bn_\bp_\bu_\bt_\br_\bc file is simple.
+ All that is required is the name of the command or the text of a macro
+ and a key sequence to which it should be bound. The name may be speci-
fied in one of two ways: as a symbolic key name, possibly with _\bM_\be_\bt_\ba_\b- or
_\bC_\bo_\bn_\bt_\br_\bo_\bl_\b- prefixes, or as a key sequence.
Meta-Rubout: backward-kill-word
Control-o: "> output"
- In the above example, _\bC_\b-_\bu is bound to the function u\bun\bni\biv\bve\ber\brs\bsa\bal\bl-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt,
- _\bM_\b-_\bD_\bE_\bL is bound to the function b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-k\bki\bil\bll\bl-\b-w\bwo\bor\brd\bd, and _\bC_\b-_\bo is bound to
- run the macro expressed on the right hand side (that is, to insert the
+ In the above example, _\bC_\b-_\bu is bound to the function u\bun\bni\biv\bve\ber\brs\bsa\bal\bl-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt,
+ _\bM_\b-_\bD_\bE_\bL is bound to the function b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-k\bki\bil\bll\bl-\b-w\bwo\bor\brd\bd, and _\bC_\b-_\bo is bound to
+ run the macro expressed on the right hand side (that is, to insert the
text ``> output'' into the line).
- In the second form, "\b"k\bke\bey\bys\bse\beq\bq"\b":_\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be or _\bm_\ba_\bc_\br_\bo, k\bke\bey\bys\bse\beq\bq differs
- from k\bke\bey\byn\bna\bam\bme\be above in that strings denoting an entire key sequence may
- be specified by placing the sequence within double quotes. Some GNU
- Emacs style key escapes can be used, as in the following example, but
+ In the second form, "\b"k\bke\bey\bys\bse\beq\bq"\b":_\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be or _\bm_\ba_\bc_\br_\bo, k\bke\bey\bys\bse\beq\bq differs
+ from k\bke\bey\byn\bna\bam\bme\be above in that strings denoting an entire key sequence may
+ be specified by placing the sequence within double quotes. Some GNU
+ Emacs style key escapes can be used, as in the following example, but
the symbolic character names are not recognized.
"\C-u": universal-argument
"\e[11~": "Function Key 1"
In this example, _\bC_\b-_\bu is again bound to the function u\bun\bni\biv\bve\ber\brs\bsa\bal\bl-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt.
- _\bC_\b-_\bx _\bC_\b-_\br is bound to the function r\bre\be-\b-r\bre\bea\bad\bd-\b-i\bin\bni\bit\bt-\b-f\bfi\bil\ble\be, and _\bE_\bS_\bC _\b[ _\b1 _\b1 _\b~ is
+ _\bC_\b-_\bx _\bC_\b-_\br is bound to the function r\bre\be-\b-r\bre\bea\bad\bd-\b-i\bin\bni\bit\bt-\b-f\bfi\bil\ble\be, and _\bE_\bS_\bC _\b[ _\b1 _\b1 _\b~ is
bound to insert the text ``Function Key 1''.
The full set of GNU Emacs style escape sequences is
\\b\"\b" literal "
\\b\'\b' literal '
- In addition to the GNU Emacs style escape sequences, a second set of
+ In addition to the GNU Emacs style escape sequences, a second set of
backslash escapes is available:
\\b\a\ba alert (bell)
\\b\b\bb backspace
\\b\r\br carriage return
\\b\t\bt horizontal tab
\\b\v\bv vertical tab
- \\b\_\bn_\bn_\bn the eight-bit character whose value is the octal value
+ \\b\_\bn_\bn_\bn the eight-bit character whose value is the octal value
_\bn_\bn_\bn (one to three digits)
- \\b\x\bx_\bH_\bH the eight-bit character whose value is the hexadecimal
+ \\b\x\bx_\bH_\bH the eight-bit character whose value is the hexadecimal
value _\bH_\bH (one or two hex digits)
When entering the text of a macro, single or double quotes must be used
to indicate a macro definition. Unquoted text is assumed to be a func-
- tion name. In the macro body, the backslash escapes described above
- are expanded. Backslash will quote any other character in the macro
+ tion name. In the macro body, the backslash escapes described above
+ are expanded. Backslash will quote any other character in the macro
text, including " and '.
- B\bBa\bas\bsh\bh allows the current readline key bindings to be displayed or modi-
- fied with the b\bbi\bin\bnd\bd builtin command. The editing mode may be switched
- during interactive use by using the -\b-o\bo option to the s\bse\bet\bt builtin com-
+ B\bBa\bas\bsh\bh allows the current readline key bindings to be displayed or modi-
+ fied with the b\bbi\bin\bnd\bd builtin command. The editing mode may be switched
+ during interactive use by using the -\b-o\bo option to the s\bse\bet\bt builtin com-
mand (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below).
R\bRe\bea\bad\bdl\bli\bin\bne\be V\bVa\bar\bri\bia\bab\bbl\ble\bes\bs
s\bse\bet\bt _\bv_\ba_\br_\bi_\ba_\bb_\bl_\be_\b-_\bn_\ba_\bm_\be _\bv_\ba_\bl_\bu_\be
- Except where noted, readline variables can take the values O\bOn\bn or O\bOf\bff\bf
- (without regard to case). Unrecognized variable names are ignored.
- When a variable value is read, empty or null values, "on" (case-insen-
+ Except where noted, readline variables can take the values O\bOn\bn or O\bOf\bff\bf
+ (without regard to case). Unrecognized variable names are ignored.
+ When a variable value is read, empty or null values, "on" (case-insen-
sitive), and "1" are equivalent to O\bOn\bn. All other values are equivalent
to O\bOf\bff\bf. The variables and their default values are:
b\bbe\bel\bll\bl-\b-s\bst\bty\byl\ble\be (\b(a\bau\bud\bdi\bib\bbl\ble\be)\b)
- Controls what happens when readline wants to ring the terminal
+ Controls what happens when readline wants to ring the terminal
bell. If set to n\bno\bon\bne\be, readline never rings the bell. If set to
- v\bvi\bis\bsi\bib\bbl\ble\be, readline uses a visible bell if one is available. If
+ v\bvi\bis\bsi\bib\bbl\ble\be, readline uses a visible bell if one is available. If
set to a\bau\bud\bdi\bib\bbl\ble\be, readline attempts to ring the terminal's bell.
b\bbi\bin\bnd\bd-\b-t\btt\bty\by-\b-s\bsp\bpe\bec\bci\bia\bal\bl-\b-c\bch\bha\bar\brs\bs (\b(O\bOn\bn)\b)
- If set to O\bOn\bn, readline attempts to bind the control characters
+ If set to O\bOn\bn, readline attempts to bind the control characters
treated specially by the kernel's terminal driver to their read-
line equivalents.
c\bco\bom\bmm\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn (\b(`\b``\b`#\b#'\b''\b')\b)
- The string that is inserted when the readline i\bin\bns\bse\ber\brt\bt-\b-c\bco\bom\bmm\bme\ben\bnt\bt
+ The string that is inserted when the readline i\bin\bns\bse\ber\brt\bt-\b-c\bco\bom\bmm\bme\ben\bnt\bt
command is executed. This command is bound to M\bM-\b-#\b# in emacs mode
and to #\b# in vi command mode.
c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bn-\b-i\big\bgn\bno\bor\bre\be-\b-c\bca\bas\bse\be (\b(O\bOf\bff\bf)\b)
If set to O\bOn\bn, readline performs filename matching and completion
in a case-insensitive fashion.
c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bn-\b-p\bpr\bre\bef\bfi\bix\bx-\b-d\bdi\bis\bsp\bpl\bla\bay\by-\b-l\ble\ben\bng\bgt\bth\bh (\b(0\b0)\b)
- The length in characters of the common prefix of a list of pos-
- sible completions that is displayed without modification. When
- set to a value greater than zero, common prefixes longer than
- this value are replaced with an ellipsis when displaying possi-
+ The length in characters of the common prefix of a list of pos-
+ sible completions that is displayed without modification. When
+ set to a value greater than zero, common prefixes longer than
+ this value are replaced with an ellipsis when displaying possi-
ble completions.
c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bn-\b-q\bqu\bue\ber\bry\by-\b-i\bit\bte\bem\bms\bs (\b(1\b10\b00\b0)\b)
- This determines when the user is queried about viewing the num-
- ber of possible completions generated by the p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-c\bco\bom\bmp\bpl\ble\be-\b-
- t\bti\bio\bon\bns\bs command. It may be set to any integer value greater than
- or equal to zero. If the number of possible completions is
+ This determines when the user is queried about viewing the num-
+ ber of possible completions generated by the p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-c\bco\bom\bmp\bpl\ble\be-\b-
+ t\bti\bio\bon\bns\bs command. It may be set to any integer value greater than
+ or equal to zero. If the number of possible completions is
greater than or equal to the value of this variable, the user is
- asked whether or not he wishes to view them; otherwise they are
+ asked whether or not he wishes to view them; otherwise they are
simply listed on the terminal.
c\bco\bon\bnv\bve\ber\brt\bt-\b-m\bme\bet\bta\ba (\b(O\bOn\bn)\b)
- If set to O\bOn\bn, readline will convert characters with the eighth
+ If set to O\bOn\bn, readline will convert characters with the eighth
bit set to an ASCII key sequence by stripping the eighth bit and
- prefixing an escape character (in effect, using escape as the
+ prefixing an escape character (in effect, using escape as the
_\bm_\be_\bt_\ba _\bp_\br_\be_\bf_\bi_\bx).
d\bdi\bis\bsa\bab\bbl\ble\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bn (\b(O\bOf\bff\bf)\b)
If set to O\bOn\bn, readline will inhibit word completion. Completion
- characters will be inserted into the line as if they had been
+ characters will be inserted into the line as if they had been
mapped to s\bse\bel\blf\bf-\b-i\bin\bns\bse\ber\brt\bt.
e\bed\bdi\bit\bti\bin\bng\bg-\b-m\bmo\bod\bde\be (\b(e\bem\bma\bac\bcs\bs)\b)
Controls whether readline begins with a set of key bindings sim-
ilar to _\bE_\bm_\ba_\bc_\bs or _\bv_\bi. e\bed\bdi\bit\bti\bin\bng\bg-\b-m\bmo\bod\bde\be can be set to either e\bem\bma\bac\bcs\bs or
v\bvi\bi.
e\bec\bch\bho\bo-\b-c\bco\bon\bnt\btr\bro\bol\bl-\b-c\bch\bha\bar\bra\bac\bct\bte\ber\brs\bs (\b(O\bOn\bn)\b)
- When set to O\bOn\bn, on operating systems that indicate they support
+ When set to O\bOn\bn, on operating systems that indicate they support
it, readline echoes a character corresponding to a signal gener-
ated from the keyboard.
e\ben\bna\bab\bbl\ble\be-\b-k\bke\bey\byp\bpa\bad\bd (\b(O\bOf\bff\bf)\b)
When set to O\bOn\bn, readline will try to enable the application key-
- pad when it is called. Some systems need this to enable the
+ pad when it is called. Some systems need this to enable the
arrow keys.
e\ben\bna\bab\bbl\ble\be-\b-m\bme\bet\bta\ba-\b-k\bke\bey\by (\b(O\bOn\bn)\b)
- When set to O\bOn\bn, readline will try to enable any meta modifier
- key the terminal claims to support when it is called. On many
+ When set to O\bOn\bn, readline will try to enable any meta modifier
+ key the terminal claims to support when it is called. On many
terminals, the meta key is used to send eight-bit characters.
e\bex\bxp\bpa\ban\bnd\bd-\b-t\bti\bil\bld\bde\be (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, tilde expansion is performed when readline
+ If set to O\bOn\bn, tilde expansion is performed when readline
attempts word completion.
h\bhi\bis\bst\bto\bor\bry\by-\b-p\bpr\bre\bes\bse\ber\brv\bve\be-\b-p\bpo\boi\bin\bnt\bt (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, the history code attempts to place point at the
- same location on each history line retrieved with p\bpr\bre\bev\bvi\bio\bou\bus\bs-\b-h\bhi\bis\bs-\b-
+ If set to O\bOn\bn, the history code attempts to place point at the
+ same location on each history line retrieved with p\bpr\bre\bev\bvi\bio\bou\bus\bs-\b-h\bhi\bis\bs-\b-
t\bto\bor\bry\by or n\bne\bex\bxt\bt-\b-h\bhi\bis\bst\bto\bor\bry\by.
h\bhi\bis\bst\bto\bor\bry\by-\b-s\bsi\biz\bze\be (\b(0\b0)\b)
- Set the maximum number of history entries saved in the history
+ Set the maximum number of history entries saved in the history
list. If set to zero, the number of entries in the history list
is not limited.
h\bho\bor\bri\biz\bzo\bon\bnt\bta\bal\bl-\b-s\bsc\bcr\bro\bol\bll\bl-\b-m\bmo\bod\bde\be (\b(O\bOf\bff\bf)\b)
- When set to O\bOn\bn, makes readline use a single line for display,
+ When set to O\bOn\bn, makes readline use a single line for display,
scrolling the input horizontally on a single screen line when it
- becomes longer than the screen width rather than wrapping to a
+ becomes longer than the screen width rather than wrapping to a
new line.
i\bin\bnp\bpu\but\bt-\b-m\bme\bet\bta\ba (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, readline will enable eight-bit input (that is, it
- will not strip the high bit from the characters it reads),
+ If set to O\bOn\bn, readline will enable eight-bit input (that is, it
+ will not strip the high bit from the characters it reads),
regardless of what the terminal claims it can support. The name
m\bme\bet\bta\ba-\b-f\bfl\bla\bag\bg is a synonym for this variable.
i\bis\bse\bea\bar\brc\bch\bh-\b-t\bte\ber\brm\bmi\bin\bna\bat\bto\bor\brs\bs (\b(`\b``\b`C\bC-\b-[\b[C\bC-\b-J\bJ'\b''\b')\b)
- The string of characters that should terminate an incremental
- search without subsequently executing the character as a com-
- mand. If this variable has not been given a value, the charac-
+ The string of characters that should terminate an incremental
+ search without subsequently executing the character as a com-
+ mand. If this variable has not been given a value, the charac-
ters _\bE_\bS_\bC and _\bC_\b-_\bJ will terminate an incremental search.
k\bke\bey\bym\bma\bap\bp (\b(e\bem\bma\bac\bcs\bs)\b)
- Set the current readline keymap. The set of valid keymap names
- is _\be_\bm_\ba_\bc_\bs_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\bd_\ba_\br_\bd_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bm_\be_\bt_\ba_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bc_\bt_\bl_\bx_\b, _\bv_\bi_\b, _\bv_\bi_\b-_\bc_\bo_\bm_\b-
- _\bm_\ba_\bn_\bd, and _\bv_\bi_\b-_\bi_\bn_\bs_\be_\br_\bt. _\bv_\bi is equivalent to _\bv_\bi_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd; _\be_\bm_\ba_\bc_\bs is
- equivalent to _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\bd_\ba_\br_\bd. The default value is _\be_\bm_\ba_\bc_\bs; the
+ Set the current readline keymap. The set of valid keymap names
+ is _\be_\bm_\ba_\bc_\bs_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\bd_\ba_\br_\bd_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bm_\be_\bt_\ba_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bc_\bt_\bl_\bx_\b, _\bv_\bi_\b, _\bv_\bi_\b-_\bc_\bo_\bm_\b-
+ _\bm_\ba_\bn_\bd, and _\bv_\bi_\b-_\bi_\bn_\bs_\be_\br_\bt. _\bv_\bi is equivalent to _\bv_\bi_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd; _\be_\bm_\ba_\bc_\bs is
+ equivalent to _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\bd_\ba_\br_\bd. The default value is _\be_\bm_\ba_\bc_\bs; the
value of e\bed\bdi\bit\bti\bin\bng\bg-\b-m\bmo\bod\bde\be also affects the default keymap.
m\bma\bar\brk\bk-\b-d\bdi\bir\bre\bec\bct\bto\bor\bri\bie\bes\bs (\b(O\bOn\bn)\b)
If set to O\bOn\bn, completed directory names have a slash appended.
m\bma\bar\brk\bk-\b-m\bmo\bod\bdi\bif\bfi\bie\bed\bd-\b-l\bli\bin\bne\bes\bs (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, history lines that have been modified are dis-
+ If set to O\bOn\bn, history lines that have been modified are dis-
played with a preceding asterisk (*\b*).
m\bma\bar\brk\bk-\b-s\bsy\bym\bml\bli\bin\bnk\bke\bed\bd-\b-d\bdi\bir\bre\bec\bct\bto\bor\bri\bie\bes\bs (\b(O\bOf\bff\bf)\b)
If set to O\bOn\bn, completed names which are symbolic links to direc-
- tories have a slash appended (subject to the value of
+ tories have a slash appended (subject to the value of
m\bma\bar\brk\bk-\b-d\bdi\bir\bre\bec\bct\bto\bor\bri\bie\bes\bs).
m\bma\bat\btc\bch\bh-\b-h\bhi\bid\bdd\bde\ben\bn-\b-f\bfi\bil\ble\bes\bs (\b(O\bOn\bn)\b)
- This variable, when set to O\bOn\bn, causes readline to match files
- whose names begin with a `.' (hidden files) when performing
- filename completion. If set to O\bOf\bff\bf, the leading `.' must be
+ This variable, when set to O\bOn\bn, causes readline to match files
+ whose names begin with a `.' (hidden files) when performing
+ filename completion. If set to O\bOf\bff\bf, the leading `.' must be
supplied by the user in the filename to be completed.
m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-d\bdi\bis\bsp\bpl\bla\bay\by-\b-p\bpr\bre\bef\bfi\bix\bx (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, menu completion displays the common prefix of the
+ If set to O\bOn\bn, menu completion displays the common prefix of the
list of possible completions (which may be empty) before cycling
through the list.
o\bou\but\btp\bpu\but\bt-\b-m\bme\bet\bta\ba (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, readline will display characters with the eighth
+ If set to O\bOn\bn, readline will display characters with the eighth
bit set directly rather than as a meta-prefixed escape sequence.
p\bpa\bag\bge\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs (\b(O\bOn\bn)\b)
- If set to O\bOn\bn, readline uses an internal _\bm_\bo_\br_\be-like pager to dis-
+ If set to O\bOn\bn, readline uses an internal _\bm_\bo_\br_\be-like pager to dis-
play a screenful of possible completions at a time.
p\bpr\bri\bin\bnt\bt-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs-\b-h\bho\bor\bri\biz\bzo\bon\bnt\bta\bal\bll\bly\by (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, readline will display completions with matches
- sorted horizontally in alphabetical order, rather than down the
+ If set to O\bOn\bn, readline will display completions with matches
+ sorted horizontally in alphabetical order, rather than down the
screen.
r\bre\bev\bve\ber\brt\bt-\b-a\bal\bll\bl-\b-a\bat\bt-\b-n\bne\bew\bwl\bli\bin\bne\be (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, readline will undo all changes to history lines
+ If set to O\bOn\bn, readline will undo all changes to history lines
before returning when a\bac\bcc\bce\bep\bpt\bt-\b-l\bli\bin\bne\be is executed. By default, his-
- tory lines may be modified and retain individual undo lists
+ tory lines may be modified and retain individual undo lists
across calls to r\bre\bea\bad\bdl\bli\bin\bne\be.
s\bsh\bho\bow\bw-\b-a\bal\bll\bl-\b-i\bif\bf-\b-a\bam\bmb\bbi\big\bgu\buo\bou\bus\bs (\b(O\bOf\bff\bf)\b)
- This alters the default behavior of the completion functions.
+ This alters the default behavior of the completion functions.
If set to O\bOn\bn, words which have more than one possible completion
- cause the matches to be listed immediately instead of ringing
+ cause the matches to be listed immediately instead of ringing
the bell.
s\bsh\bho\bow\bw-\b-a\bal\bll\bl-\b-i\bif\bf-\b-u\bun\bnm\bmo\bod\bdi\bif\bfi\bie\bed\bd (\b(O\bOf\bff\bf)\b)
- This alters the default behavior of the completion functions in
+ This alters the default behavior of the completion functions in
a fashion similar to s\bsh\bho\bow\bw-\b-a\bal\bll\bl-\b-i\bif\bf-\b-a\bam\bmb\bbi\big\bgu\buo\bou\bus\bs. If set to O\bOn\bn, words
- which have more than one possible completion without any possi-
- ble partial completion (the possible completions don't share a
- common prefix) cause the matches to be listed immediately
+ which have more than one possible completion without any possi-
+ ble partial completion (the possible completions don't share a
+ common prefix) cause the matches to be listed immediately
instead of ringing the bell.
s\bsk\bki\bip\bp-\b-c\bco\bom\bmp\bpl\ble\bet\bte\bed\bd-\b-t\bte\bex\bxt\bt (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, this alters the default completion behavior when
- inserting a single match into the line. It's only active when
- performing completion in the middle of a word. If enabled,
- readline does not insert characters from the completion that
- match characters after point in the word being completed, so
+ If set to O\bOn\bn, this alters the default completion behavior when
+ inserting a single match into the line. It's only active when
+ performing completion in the middle of a word. If enabled,
+ readline does not insert characters from the completion that
+ match characters after point in the word being completed, so
portions of the word following the cursor are not duplicated.
v\bvi\bis\bsi\bib\bbl\ble\be-\b-s\bst\bta\bat\bts\bs (\b(O\bOf\bff\bf)\b)
- If set to O\bOn\bn, a character denoting a file's type as reported by
- _\bs_\bt_\ba_\bt(2) is appended to the filename when listing possible com-
+ If set to O\bOn\bn, a character denoting a file's type as reported by
+ _\bs_\bt_\ba_\bt(2) is appended to the filename when listing possible com-
pletions.
R\bRe\bea\bad\bdl\bli\bin\bne\be C\bCo\bon\bnd\bdi\bit\bti\bio\bon\bna\bal\bl C\bCo\bon\bns\bst\btr\bru\buc\bct\bts\bs
- Readline implements a facility similar in spirit to the conditional
- compilation features of the C preprocessor which allows key bindings
- and variable settings to be performed as the result of tests. There
+ Readline implements a facility similar in spirit to the conditional
+ compilation features of the C preprocessor which allows key bindings
+ and variable settings to be performed as the result of tests. There
are four parser directives used.
- $\b$i\bif\bf The $\b$i\bif\bf construct allows bindings to be made based on the edit-
- ing mode, the terminal being used, or the application using
- readline. The text of the test extends to the end of the line;
+ $\b$i\bif\bf The $\b$i\bif\bf construct allows bindings to be made based on the edit-
+ ing mode, the terminal being used, or the application using
+ readline. The text of the test extends to the end of the line;
no characters are required to isolate it.
- m\bmo\bod\bde\be The m\bmo\bod\bde\be=\b= form of the $\b$i\bif\bf directive is used to test
- whether readline is in emacs or vi mode. This may be
- used in conjunction with the s\bse\bet\bt k\bke\bey\bym\bma\bap\bp command, for
- instance, to set bindings in the _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\bd_\ba_\br_\bd and
- _\be_\bm_\ba_\bc_\bs_\b-_\bc_\bt_\bl_\bx keymaps only if readline is starting out in
+ m\bmo\bod\bde\be The m\bmo\bod\bde\be=\b= form of the $\b$i\bif\bf directive is used to test
+ whether readline is in emacs or vi mode. This may be
+ used in conjunction with the s\bse\bet\bt k\bke\bey\bym\bma\bap\bp command, for
+ instance, to set bindings in the _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\bd_\ba_\br_\bd and
+ _\be_\bm_\ba_\bc_\bs_\b-_\bc_\bt_\bl_\bx keymaps only if readline is starting out in
emacs mode.
- t\bte\ber\brm\bm The t\bte\ber\brm\bm=\b= form may be used to include terminal-specific
+ t\bte\ber\brm\bm The t\bte\ber\brm\bm=\b= form may be used to include terminal-specific
key bindings, perhaps to bind the key sequences output by
the terminal's function keys. The word on the right side
of the =\b= is tested against the both full name of the ter-
- minal and the portion of the terminal name before the
- first -\b-. This allows _\bs_\bu_\bn to match both _\bs_\bu_\bn and _\bs_\bu_\bn_\b-_\bc_\bm_\bd,
+ minal and the portion of the terminal name before the
+ first -\b-. This allows _\bs_\bu_\bn to match both _\bs_\bu_\bn and _\bs_\bu_\bn_\b-_\bc_\bm_\bd,
for instance.
a\bap\bpp\bpl\bli\bic\bca\bat\bti\bio\bon\bn
The a\bap\bpp\bpl\bli\bic\bca\bat\bti\bio\bon\bn construct is used to include application-
specific settings. Each program using the readline
- library sets the _\ba_\bp_\bp_\bl_\bi_\bc_\ba_\bt_\bi_\bo_\bn _\bn_\ba_\bm_\be, and an initialization
+ library sets the _\ba_\bp_\bp_\bl_\bi_\bc_\ba_\bt_\bi_\bo_\bn _\bn_\ba_\bm_\be, and an initialization
file can test for a particular value. This could be used
- to bind key sequences to functions useful for a specific
- program. For instance, the following command adds a key
- sequence that quotes the current or previous word in
+ to bind key sequences to functions useful for a specific
+ program. For instance, the following command adds a key
+ sequence that quotes the current or previous word in
b\bba\bas\bsh\bh:
$\b$i\bif\bf Bash
test fails.
$\b$i\bin\bnc\bcl\blu\bud\bde\be
- This directive takes a single filename as an argument and reads
- commands and bindings from that file. For example, the follow-
+ This directive takes a single filename as an argument and reads
+ commands and bindings from that file. For example, the follow-
ing directive would read _\b/_\be_\bt_\bc_\b/_\bi_\bn_\bp_\bu_\bt_\br_\bc:
$\b$i\bin\bnc\bcl\blu\bud\bde\be _\b/_\be_\bt_\bc_\b/_\bi_\bn_\bp_\bu_\bt_\br_\bc
S\bSe\bea\bar\brc\bch\bhi\bin\bng\bg
- Readline provides commands for searching through the command history
+ Readline provides commands for searching through the command history
(see H\bHI\bIS\bST\bTO\bOR\bRY\bY below) for lines containing a specified string. There are
two search modes: _\bi_\bn_\bc_\br_\be_\bm_\be_\bn_\bt_\ba_\bl and _\bn_\bo_\bn_\b-_\bi_\bn_\bc_\br_\be_\bm_\be_\bn_\bt_\ba_\bl.
- Incremental searches begin before the user has finished typing the
- search string. As each character of the search string is typed, read-
+ Incremental searches begin before the user has finished typing the
+ search string. As each character of the search string is typed, read-
line displays the next entry from the history matching the string typed
- so far. An incremental search requires only as many characters as
- needed to find the desired history entry. The characters present in
- the value of the i\bis\bse\bea\bar\brc\bch\bh-\b-t\bte\ber\brm\bmi\bin\bna\bat\bto\bor\brs\bs variable are used to terminate an
+ so far. An incremental search requires only as many characters as
+ needed to find the desired history entry. The characters present in
+ the value of the i\bis\bse\bea\bar\brc\bch\bh-\b-t\bte\ber\brm\bmi\bin\bna\bat\bto\bor\brs\bs variable are used to terminate an
incremental search. If that variable has not been assigned a value the
- Escape and Control-J characters will terminate an incremental search.
- Control-G will abort an incremental search and restore the original
- line. When the search is terminated, the history entry containing the
+ Escape and Control-J characters will terminate an incremental search.
+ Control-G will abort an incremental search and restore the original
+ line. When the search is terminated, the history entry containing the
search string becomes the current line.
- To find other matching entries in the history list, type Control-S or
- Control-R as appropriate. This will search backward or forward in the
- history for the next entry matching the search string typed so far.
- Any other key sequence bound to a readline command will terminate the
- search and execute that command. For instance, a _\bn_\be_\bw_\bl_\bi_\bn_\be will termi-
+ To find other matching entries in the history list, type Control-S or
+ Control-R as appropriate. This will search backward or forward in the
+ history for the next entry matching the search string typed so far.
+ Any other key sequence bound to a readline command will terminate the
+ search and execute that command. For instance, a _\bn_\be_\bw_\bl_\bi_\bn_\be will termi-
nate the search and accept the line, thereby executing the command from
the history list.
Readline remembers the last incremental search string. If two Control-
- Rs are typed without any intervening characters defining a new search
+ Rs are typed without any intervening characters defining a new search
string, any remembered search string is used.
- Non-incremental searches read the entire search string before starting
- to search for matching history lines. The search string may be typed
+ Non-incremental searches read the entire search string before starting
+ to search for matching history lines. The search string may be typed
by the user or be part of the contents of the current line.
R\bRe\bea\bad\bdl\bli\bin\bne\be C\bCo\bom\bmm\bma\ban\bnd\bd N\bNa\bam\bme\bes\bs
- The following is a list of the names of the commands and the default
+ The following is a list of the names of the commands and the default
key sequences to which they are bound. Command names without an accom-
panying key sequence are unbound by default. In the following descrip-
- tions, _\bp_\bo_\bi_\bn_\bt refers to the current cursor position, and _\bm_\ba_\br_\bk refers to
- a cursor position saved by the s\bse\bet\bt-\b-m\bma\bar\brk\bk command. The text between the
+ tions, _\bp_\bo_\bi_\bn_\bt refers to the current cursor position, and _\bm_\ba_\br_\bk refers to
+ a cursor position saved by the s\bse\bet\bt-\b-m\bma\bar\brk\bk command. The text between the
point and mark is referred to as the _\br_\be_\bg_\bi_\bo_\bn.
C\bCo\bom\bmm\bma\ban\bnd\bds\bs f\bfo\bor\br M\bMo\bov\bvi\bin\bng\bg
Move forward to the end of the next word. Words are composed of
alphanumeric characters (letters and digits).
b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-b\bb)\b)
- Move back to the start of the current or previous word. Words
+ Move back to the start of the current or previous word. Words
are composed of alphanumeric characters (letters and digits).
s\bsh\bhe\bel\bll\bl-\b-f\bfo\bor\brw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd
- Move forward to the end of the next word. Words are delimited
+ Move forward to the end of the next word. Words are delimited
by non-quoted shell metacharacters.
s\bsh\bhe\bel\bll\bl-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd
- Move back to the start of the current or previous word. Words
+ Move back to the start of the current or previous word. Words
are delimited by non-quoted shell metacharacters.
c\bcl\ble\bea\bar\br-\b-s\bsc\bcr\bre\bee\ben\bn (\b(C\bC-\b-l\bl)\b)
- Clear the screen leaving the current line at the top of the
- screen. With an argument, refresh the current line without
+ Clear the screen leaving the current line at the top of the
+ screen. With an argument, refresh the current line without
clearing the screen.
r\bre\bed\bdr\bra\baw\bw-\b-c\bcu\bur\brr\bre\ben\bnt\bt-\b-l\bli\bin\bne\be
Refresh the current line.
C\bCo\bom\bmm\bma\ban\bnd\bds\bs f\bfo\bor\br M\bMa\ban\bni\bip\bpu\bul\bla\bat\bti\bin\bng\bg t\bth\bhe\be H\bHi\bis\bst\bto\bor\bry\by
a\bac\bcc\bce\bep\bpt\bt-\b-l\bli\bin\bne\be (\b(N\bNe\bew\bwl\bli\bin\bne\be,\b, R\bRe\bet\btu\bur\brn\bn)\b)
Accept the line regardless of where the cursor is. If this line
- is non-empty, add it to the history list according to the state
- of the H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL variable. If the line is a modified history
+ is non-empty, add it to the history list according to the state
+ of the H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL variable. If the line is a modified history
line, then restore the history line to its original state.
p\bpr\bre\bev\bvi\bio\bou\bus\bs-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(C\bC-\b-p\bp)\b)
Fetch the previous command from the history list, moving back in
the list.
n\bne\bex\bxt\bt-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(C\bC-\b-n\bn)\b)
- Fetch the next command from the history list, moving forward in
+ Fetch the next command from the history list, moving forward in
the list.
b\bbe\beg\bgi\bin\bnn\bni\bin\bng\bg-\b-o\bof\bf-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(M\bM-\b-<\b<)\b)
Move to the first line in the history.
e\ben\bnd\bd-\b-o\bof\bf-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(M\bM-\b->\b>)\b)
- Move to the end of the input history, i.e., the line currently
+ Move to the end of the input history, i.e., the line currently
being entered.
r\bre\bev\bve\ber\brs\bse\be-\b-s\bse\bea\bar\brc\bch\bh-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(C\bC-\b-r\br)\b)
- Search backward starting at the current line and moving `up'
- through the history as necessary. This is an incremental
+ Search backward starting at the current line and moving `up'
+ through the history as necessary. This is an incremental
search.
f\bfo\bor\brw\bwa\bar\brd\bd-\b-s\bse\bea\bar\brc\bch\bh-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(C\bC-\b-s\bs)\b)
- Search forward starting at the current line and moving `down'
- through the history as necessary. This is an incremental
+ Search forward starting at the current line and moving `down'
+ through the history as necessary. This is an incremental
search.
n\bno\bon\bn-\b-i\bin\bnc\bcr\bre\bem\bme\ben\bnt\bta\bal\bl-\b-r\bre\bev\bve\ber\brs\bse\be-\b-s\bse\bea\bar\brc\bch\bh-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(M\bM-\b-p\bp)\b)
Search backward through the history starting at the current line
- using a non-incremental search for a string supplied by the
+ using a non-incremental search for a string supplied by the
user.
n\bno\bon\bn-\b-i\bin\bnc\bcr\bre\bem\bme\ben\bnt\bta\bal\bl-\b-f\bfo\bor\brw\bwa\bar\brd\bd-\b-s\bse\bea\bar\brc\bch\bh-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(M\bM-\b-n\bn)\b)
- Search forward through the history using a non-incremental
+ Search forward through the history using a non-incremental
search for a string supplied by the user.
h\bhi\bis\bst\bto\bor\bry\by-\b-s\bse\bea\bar\brc\bch\bh-\b-f\bfo\bor\brw\bwa\bar\brd\bd
- Search forward through the history for the string of characters
- between the start of the current line and the point. This is a
+ Search forward through the history for the string of characters
+ between the start of the current line and the point. This is a
non-incremental search.
h\bhi\bis\bst\bto\bor\bry\by-\b-s\bse\bea\bar\brc\bch\bh-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd
Search backward through the history for the string of characters
- between the start of the current line and the point. This is a
+ between the start of the current line and the point. This is a
non-incremental search.
y\bya\ban\bnk\bk-\b-n\bnt\bth\bh-\b-a\bar\brg\bg (\b(M\bM-\b-C\bC-\b-y\by)\b)
- Insert the first argument to the previous command (usually the
+ Insert the first argument to the previous command (usually the
second word on the previous line) at point. With an argument _\bn,
- insert the _\bnth word from the previous command (the words in the
- previous command begin with word 0). A negative argument
+ insert the _\bnth word from the previous command (the words in the
+ previous command begin with word 0). A negative argument
inserts the _\bnth word from the end of the previous command. Once
- the argument _\bn is computed, the argument is extracted as if the
+ the argument _\bn is computed, the argument is extracted as if the
"!_\bn" history expansion had been specified.
y\bya\ban\bnk\bk-\b-l\bla\bas\bst\bt-\b-a\bar\brg\bg (\b(M\bM-\b-.\b.,\b, M\bM-\b-_\b_)\b)
- Insert the last argument to the previous command (the last word
+ Insert the last argument to the previous command (the last word
of the previous history entry). With a numeric argument, behave
- exactly like y\bya\ban\bnk\bk-\b-n\bnt\bth\bh-\b-a\bar\brg\bg. Successive calls to y\bya\ban\bnk\bk-\b-l\bla\bas\bst\bt-\b-a\bar\brg\bg
- move back through the history list, inserting the last word (or
- the word specified by the argument to the first call) of each
+ exactly like y\bya\ban\bnk\bk-\b-n\bnt\bth\bh-\b-a\bar\brg\bg. Successive calls to y\bya\ban\bnk\bk-\b-l\bla\bas\bst\bt-\b-a\bar\brg\bg
+ move back through the history list, inserting the last word (or
+ the word specified by the argument to the first call) of each
line in turn. Any numeric argument supplied to these successive
- calls determines the direction to move through the history. A
- negative argument switches the direction through the history
+ calls determines the direction to move through the history. A
+ negative argument switches the direction through the history
(back or forward). The history expansion facilities are used to
- extract the last argument, as if the "!$" history expansion had
+ extract the last argument, as if the "!$" history expansion had
been specified.
s\bsh\bhe\bel\bll\bl-\b-e\bex\bxp\bpa\ban\bnd\bd-\b-l\bli\bin\bne\be (\b(M\bM-\b-C\bC-\b-e\be)\b)
Expand the line as the shell does. This performs alias and his-
tory expansion as well as all of the shell word expansions. See
- H\bHI\bIS\bST\bTO\bOR\bRY\bY E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN below for a description of history expansion.
+ H\bHI\bIS\bST\bTO\bOR\bRY\bY E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN below for a description of history expansion.
h\bhi\bis\bst\bto\bor\bry\by-\b-e\bex\bxp\bpa\ban\bnd\bd-\b-l\bli\bin\bne\be (\b(M\bM-\b-^\b^)\b)
- Perform history expansion on the current line. See H\bHI\bIS\bST\bTO\bOR\bRY\bY
+ Perform history expansion on the current line. See H\bHI\bIS\bST\bTO\bOR\bRY\bY
E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN below for a description of history expansion.
m\bma\bag\bgi\bic\bc-\b-s\bsp\bpa\bac\bce\be
- Perform history expansion on the current line and insert a
+ Perform history expansion on the current line and insert a
space. See H\bHI\bIS\bST\bTO\bOR\bRY\bY E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN below for a description of history
expansion.
a\bal\bli\bia\bas\bs-\b-e\bex\bxp\bpa\ban\bnd\bd-\b-l\bli\bin\bne\be
- Perform alias expansion on the current line. See A\bAL\bLI\bIA\bAS\bSE\bES\bS above
+ Perform alias expansion on the current line. See A\bAL\bLI\bIA\bAS\bSE\bES\bS above
for a description of alias expansion.
h\bhi\bis\bst\bto\bor\bry\by-\b-a\ban\bnd\bd-\b-a\bal\bli\bia\bas\bs-\b-e\bex\bxp\bpa\ban\bnd\bd-\b-l\bli\bin\bne\be
Perform history and alias expansion on the current line.
i\bin\bns\bse\ber\brt\bt-\b-l\bla\bas\bst\bt-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt (\b(M\bM-\b-.\b.,\b, M\bM-\b-_\b_)\b)
A synonym for y\bya\ban\bnk\bk-\b-l\bla\bas\bst\bt-\b-a\bar\brg\bg.
o\bop\bpe\ber\bra\bat\bte\be-\b-a\ban\bnd\bd-\b-g\bge\bet\bt-\b-n\bne\bex\bxt\bt (\b(C\bC-\b-o\bo)\b)
- Accept the current line for execution and fetch the next line
- relative to the current line from the history for editing. Any
+ Accept the current line for execution and fetch the next line
+ relative to the current line from the history for editing. Any
argument is ignored.
e\bed\bdi\bit\bt-\b-a\ban\bnd\bd-\b-e\bex\bxe\bec\bcu\but\bte\be-\b-c\bco\bom\bmm\bma\ban\bnd\bd (\b(C\bC-\b-x\bxC\bC-\b-e\be)\b)
- Invoke an editor on the current command line, and execute the
- result as shell commands. B\bBa\bas\bsh\bh attempts to invoke $\b$V\bVI\bIS\bSU\bUA\bAL\bL,
+ Invoke an editor on the current command line, and execute the
+ result as shell commands. B\bBa\bas\bsh\bh attempts to invoke $\b$V\bVI\bIS\bSU\bUA\bAL\bL,
$\b$E\bED\bDI\bIT\bTO\bOR\bR, and _\be_\bm_\ba_\bc_\bs as the editor, in that order.
C\bCo\bom\bmm\bma\ban\bnd\bds\bs f\bfo\bor\br C\bCh\bha\ban\bng\bgi\bin\bng\bg T\bTe\bex\bxt\bt
d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br (\b(C\bC-\b-d\bd)\b)
- Delete the character at point. If point is at the beginning of
- the line, there are no characters in the line, and the last
+ Delete the character at point. If point is at the beginning of
+ the line, there are no characters in the line, and the last
character typed was not bound to d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br, then return E\bEO\bOF\bF.
b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br (\b(R\bRu\bub\bbo\bou\but\bt)\b)
- Delete the character behind the cursor. When given a numeric
+ Delete the character behind the cursor. When given a numeric
argument, save the deleted text on the kill ring.
f\bfo\bor\brw\bwa\bar\brd\bd-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br
- Delete the character under the cursor, unless the cursor is at
+ Delete the character under the cursor, unless the cursor is at
the end of the line, in which case the character behind the cur-
sor is deleted.
q\bqu\buo\bot\bte\bed\bd-\b-i\bin\bns\bse\ber\brt\bt (\b(C\bC-\b-q\bq,\b, C\bC-\b-v\bv)\b)
- Add the next character typed to the line verbatim. This is how
+ Add the next character typed to the line verbatim. This is how
to insert characters like C\bC-\b-q\bq, for example.
t\bta\bab\bb-\b-i\bin\bns\bse\ber\brt\bt (\b(C\bC-\b-v\bv T\bTA\bAB\bB)\b)
Insert a tab character.
s\bse\bel\blf\bf-\b-i\bin\bns\bse\ber\brt\bt (\b(a\ba,\b, b\bb,\b, A\bA,\b, 1\b1,\b, !\b!,\b, .\b..\b..\b.)\b)
Insert the character typed.
t\btr\bra\ban\bns\bsp\bpo\bos\bse\be-\b-c\bch\bha\bar\brs\bs (\b(C\bC-\b-t\bt)\b)
- Drag the character before point forward over the character at
- point, moving point forward as well. If point is at the end of
- the line, then this transposes the two characters before point.
+ Drag the character before point forward over the character at
+ point, moving point forward as well. If point is at the end of
+ the line, then this transposes the two characters before point.
Negative arguments have no effect.
t\btr\bra\ban\bns\bsp\bpo\bos\bse\be-\b-w\bwo\bor\brd\bds\bs (\b(M\bM-\b-t\bt)\b)
- Drag the word before point past the word after point, moving
- point over that word as well. If point is at the end of the
+ Drag the word before point past the word after point, moving
+ point over that word as well. If point is at the end of the
line, this transposes the last two words on the line.
u\bup\bpc\bca\bas\bse\be-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-u\bu)\b)
- Uppercase the current (or following) word. With a negative
+ Uppercase the current (or following) word. With a negative
argument, uppercase the previous word, but do not move point.
d\bdo\bow\bwn\bnc\bca\bas\bse\be-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-l\bl)\b)
- Lowercase the current (or following) word. With a negative
+ Lowercase the current (or following) word. With a negative
argument, lowercase the previous word, but do not move point.
c\bca\bap\bpi\bit\bta\bal\bli\biz\bze\be-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-c\bc)\b)
- Capitalize the current (or following) word. With a negative
+ Capitalize the current (or following) word. With a negative
argument, capitalize the previous word, but do not move point.
o\bov\bve\ber\brw\bwr\bri\bit\bte\be-\b-m\bmo\bod\bde\be
- Toggle overwrite mode. With an explicit positive numeric argu-
+ Toggle overwrite mode. With an explicit positive numeric argu-
ment, switches to overwrite mode. With an explicit non-positive
numeric argument, switches to insert mode. This command affects
- only e\bem\bma\bac\bcs\bs mode; v\bvi\bi mode does overwrite differently. Each call
+ only e\bem\bma\bac\bcs\bs mode; v\bvi\bi mode does overwrite differently. Each call
to _\br_\be_\ba_\bd_\bl_\bi_\bn_\be_\b(_\b) starts in insert mode. In overwrite mode, charac-
- ters bound to s\bse\bel\blf\bf-\b-i\bin\bns\bse\ber\brt\bt replace the text at point rather than
- pushing the text to the right. Characters bound to b\bba\bac\bck\bk-\b-
- w\bwa\bar\brd\bd-\b-d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br replace the character before point with a
+ ters bound to s\bse\bel\blf\bf-\b-i\bin\bns\bse\ber\brt\bt replace the text at point rather than
+ pushing the text to the right. Characters bound to b\bba\bac\bck\bk-\b-
+ w\bwa\bar\brd\bd-\b-d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br replace the character before point with a
space. By default, this command is unbound.
K\bKi\bil\bll\bli\bin\bng\bg a\ban\bnd\bd Y\bYa\ban\bnk\bki\bin\bng\bg
b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-k\bki\bil\bll\bl-\b-l\bli\bin\bne\be (\b(C\bC-\b-x\bx R\bRu\bub\bbo\bou\but\bt)\b)
Kill backward to the beginning of the line.
u\bun\bni\bix\bx-\b-l\bli\bin\bne\be-\b-d\bdi\bis\bsc\bca\bar\brd\bd (\b(C\bC-\b-u\bu)\b)
- Kill backward from point to the beginning of the line. The
+ Kill backward from point to the beginning of the line. The
killed text is saved on the kill-ring.
k\bki\bil\bll\bl-\b-w\bwh\bho\bol\ble\be-\b-l\bli\bin\bne\be
- Kill all characters on the current line, no matter where point
+ Kill all characters on the current line, no matter where point
is.
k\bki\bil\bll\bl-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-d\bd)\b)
- Kill from point to the end of the current word, or if between
- words, to the end of the next word. Word boundaries are the
+ Kill from point to the end of the current word, or if between
+ words, to the end of the next word. Word boundaries are the
same as those used by f\bfo\bor\brw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd.
b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-k\bki\bil\bll\bl-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-R\bRu\bub\bbo\bou\but\bt)\b)
- Kill the word behind point. Word boundaries are the same as
+ Kill the word behind point. Word boundaries are the same as
those used by b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd.
s\bsh\bhe\bel\bll\bl-\b-k\bki\bil\bll\bl-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-d\bd)\b)
- Kill from point to the end of the current word, or if between
- words, to the end of the next word. Word boundaries are the
+ Kill from point to the end of the current word, or if between
+ words, to the end of the next word. Word boundaries are the
same as those used by s\bsh\bhe\bel\bll\bl-\b-f\bfo\bor\brw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd.
s\bsh\bhe\bel\bll\bl-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-k\bki\bil\bll\bl-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-R\bRu\bub\bbo\bou\but\bt)\b)
- Kill the word behind point. Word boundaries are the same as
+ Kill the word behind point. Word boundaries are the same as
those used by s\bsh\bhe\bel\bll\bl-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd.
u\bun\bni\bix\bx-\b-w\bwo\bor\brd\bd-\b-r\bru\bub\bbo\bou\but\bt (\b(C\bC-\b-w\bw)\b)
- Kill the word behind point, using white space as a word bound-
+ Kill the word behind point, using white space as a word bound-
ary. The killed text is saved on the kill-ring.
u\bun\bni\bix\bx-\b-f\bfi\bil\ble\ben\bna\bam\bme\be-\b-r\bru\bub\bbo\bou\but\bt
- Kill the word behind point, using white space and the slash
- character as the word boundaries. The killed text is saved on
+ Kill the word behind point, using white space and the slash
+ character as the word boundaries. The killed text is saved on
the kill-ring.
d\bde\bel\ble\bet\bte\be-\b-h\bho\bor\bri\biz\bzo\bon\bnt\bta\bal\bl-\b-s\bsp\bpa\bac\bce\be (\b(M\bM-\b-\\b\)\b)
Delete all spaces and tabs around point.
c\bco\bop\bpy\by-\b-r\bre\beg\bgi\bio\bon\bn-\b-a\bas\bs-\b-k\bki\bil\bll\bl
Copy the text in the region to the kill buffer.
c\bco\bop\bpy\by-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd
- Copy the word before point to the kill buffer. The word bound-
+ Copy the word before point to the kill buffer. The word bound-
aries are the same as b\bba\bac\bck\bkw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd.
c\bco\bop\bpy\by-\b-f\bfo\bor\brw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd
- Copy the word following point to the kill buffer. The word
+ Copy the word following point to the kill buffer. The word
boundaries are the same as f\bfo\bor\brw\bwa\bar\brd\bd-\b-w\bwo\bor\brd\bd.
y\bya\ban\bnk\bk (\b(C\bC-\b-y\by)\b)
Yank the top of the kill ring into the buffer at point.
y\bya\ban\bnk\bk-\b-p\bpo\bop\bp (\b(M\bM-\b-y\by)\b)
- Rotate the kill ring, and yank the new top. Only works follow-
+ Rotate the kill ring, and yank the new top. Only works follow-
ing y\bya\ban\bnk\bk or y\bya\ban\bnk\bk-\b-p\bpo\bop\bp.
N\bNu\bum\bme\ber\bri\bic\bc A\bAr\brg\bgu\bum\bme\ben\bnt\bts\bs
d\bdi\big\bgi\bit\bt-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt (\b(M\bM-\b-0\b0,\b, M\bM-\b-1\b1,\b, .\b..\b..\b.,\b, M\bM-\b--\b-)\b)
- Add this digit to the argument already accumulating, or start a
+ Add this digit to the argument already accumulating, or start a
new argument. M-- starts a negative argument.
u\bun\bni\biv\bve\ber\brs\bsa\bal\bl-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt
- This is another way to specify an argument. If this command is
- followed by one or more digits, optionally with a leading minus
- sign, those digits define the argument. If the command is fol-
- lowed by digits, executing u\bun\bni\biv\bve\ber\brs\bsa\bal\bl-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt again ends the
- numeric argument, but is otherwise ignored. As a special case,
- if this command is immediately followed by a character that is
- neither a digit or minus sign, the argument count for the next
- command is multiplied by four. The argument count is initially
- one, so executing this function the first time makes the argu-
+ This is another way to specify an argument. If this command is
+ followed by one or more digits, optionally with a leading minus
+ sign, those digits define the argument. If the command is fol-
+ lowed by digits, executing u\bun\bni\biv\bve\ber\brs\bsa\bal\bl-\b-a\bar\brg\bgu\bum\bme\ben\bnt\bt again ends the
+ numeric argument, but is otherwise ignored. As a special case,
+ if this command is immediately followed by a character that is
+ neither a digit or minus sign, the argument count for the next
+ command is multiplied by four. The argument count is initially
+ one, so executing this function the first time makes the argu-
ment count four, a second time makes the argument count sixteen,
and so on.
C\bCo\bom\bmp\bpl\ble\bet\bti\bin\bng\bg
c\bco\bom\bmp\bpl\ble\bet\bte\be (\b(T\bTA\bAB\bB)\b)
- Attempt to perform completion on the text before point. B\bBa\bas\bsh\bh
+ Attempt to perform completion on the text before point. B\bBa\bas\bsh\bh
attempts completion treating the text as a variable (if the text
- begins with $\b$), username (if the text begins with ~\b~), hostname
- (if the text begins with @\b@), or command (including aliases and
+ begins with $\b$), username (if the text begins with ~\b~), hostname
+ (if the text begins with @\b@), or command (including aliases and
functions) in turn. If none of these produces a match, filename
completion is attempted.
p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs (\b(M\bM-\b-?\b?)\b)
List the possible completions of the text before point.
i\bin\bns\bse\ber\brt\bt-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs (\b(M\bM-\b-*\b*)\b)
- Insert all completions of the text before point that would have
+ Insert all completions of the text before point that would have
been generated by p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs.
m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be
- Similar to c\bco\bom\bmp\bpl\ble\bet\bte\be, but replaces the word to be completed with
- a single match from the list of possible completions. Repeated
- execution of m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be steps through the list of possible
- completions, inserting each match in turn. At the end of the
+ Similar to c\bco\bom\bmp\bpl\ble\bet\bte\be, but replaces the word to be completed with
+ a single match from the list of possible completions. Repeated
+ execution of m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be steps through the list of possible
+ completions, inserting each match in turn. At the end of the
list of completions, the bell is rung (subject to the setting of
b\bbe\bel\bll\bl-\b-s\bst\bty\byl\ble\be) and the original text is restored. An argument of _\bn
- moves _\bn positions forward in the list of matches; a negative
- argument may be used to move backward through the list. This
- command is intended to be bound to T\bTA\bAB\bB, but is unbound by
+ moves _\bn positions forward in the list of matches; a negative
+ argument may be used to move backward through the list. This
+ command is intended to be bound to T\bTA\bAB\bB, but is unbound by
default.
m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd
- Identical to m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be, but moves backward through the list
- of possible completions, as if m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be had been given a
+ Identical to m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be, but moves backward through the list
+ of possible completions, as if m\bme\ben\bnu\bu-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be had been given a
negative argument. This command is unbound by default.
d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br-\b-o\bor\br-\b-l\bli\bis\bst\bt
- Deletes the character under the cursor if not at the beginning
- or end of the line (like d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br). If at the end of the
+ Deletes the character under the cursor if not at the beginning
+ or end of the line (like d\bde\bel\ble\bet\bte\be-\b-c\bch\bha\bar\br). If at the end of the
line, behaves identically to p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs. This command
is unbound by default.
c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-f\bfi\bil\ble\ben\bna\bam\bme\be (\b(M\bM-\b-/\b/)\b)
List the possible completions of the text before point, treating
it as a filename.
c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-u\bus\bse\ber\brn\bna\bam\bme\be (\b(M\bM-\b-~\b~)\b)
- Attempt completion on the text before point, treating it as a
+ Attempt completion on the text before point, treating it as a
username.
p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-u\bus\bse\ber\brn\bna\bam\bme\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs (\b(C\bC-\b-x\bx ~\b~)\b)
List the possible completions of the text before point, treating
it as a username.
c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-v\bva\bar\bri\bia\bab\bbl\ble\be (\b(M\bM-\b-$\b$)\b)
- Attempt completion on the text before point, treating it as a
+ Attempt completion on the text before point, treating it as a
shell variable.
p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-v\bva\bar\bri\bia\bab\bbl\ble\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs (\b(C\bC-\b-x\bx $\b$)\b)
List the possible completions of the text before point, treating
it as a shell variable.
c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-h\bho\bos\bst\btn\bna\bam\bme\be (\b(M\bM-\b-@\b@)\b)
- Attempt completion on the text before point, treating it as a
+ Attempt completion on the text before point, treating it as a
hostname.
p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-h\bho\bos\bst\btn\bna\bam\bme\be-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs (\b(C\bC-\b-x\bx @\b@)\b)
List the possible completions of the text before point, treating
it as a hostname.
c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-c\bco\bom\bmm\bma\ban\bnd\bd (\b(M\bM-\b-!\b!)\b)
- Attempt completion on the text before point, treating it as a
- command name. Command completion attempts to match the text
- against aliases, reserved words, shell functions, shell
+ Attempt completion on the text before point, treating it as a
+ command name. Command completion attempts to match the text
+ against aliases, reserved words, shell functions, shell
builtins, and finally executable filenames, in that order.
p\bpo\bos\bss\bsi\bib\bbl\ble\be-\b-c\bco\bom\bmm\bma\ban\bnd\bd-\b-c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bns\bs (\b(C\bC-\b-x\bx !\b!)\b)
List the possible completions of the text before point, treating
it as a command name.
d\bdy\byn\bna\bam\bmi\bic\bc-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-h\bhi\bis\bst\bto\bor\bry\by (\b(M\bM-\b-T\bTA\bAB\bB)\b)
- Attempt completion on the text before point, comparing the text
- against lines from the history list for possible completion
+ Attempt completion on the text before point, comparing the text
+ against lines from the history list for possible completion
matches.
d\bda\bab\bbb\bbr\bre\bev\bv-\b-e\bex\bxp\bpa\ban\bnd\bd
- Attempt menu completion on the text before point, comparing the
+ Attempt menu completion on the text before point, comparing the
text against lines from the history list for possible completion
matches.
c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-i\bin\bnt\bto\bo-\b-b\bbr\bra\bac\bce\bes\bs (\b(M\bM-\b-{\b{)\b)
Perform filename completion and insert the list of possible com-
- pletions enclosed within braces so the list is available to the
+ pletions enclosed within braces so the list is available to the
shell (see B\bBr\bra\bac\bce\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn above).
K\bKe\bey\byb\bbo\boa\bar\brd\bd M\bMa\bac\bcr\bro\bos\bs
s\bst\bta\bar\brt\bt-\b-k\bkb\bbd\bd-\b-m\bma\bac\bcr\bro\bo (\b(C\bC-\b-x\bx (\b()\b)
- Begin saving the characters typed into the current keyboard
+ Begin saving the characters typed into the current keyboard
macro.
e\ben\bnd\bd-\b-k\bkb\bbd\bd-\b-m\bma\bac\bcr\bro\bo (\b(C\bC-\b-x\bx )\b))\b)
Stop saving the characters typed into the current keyboard macro
and store the definition.
c\bca\bal\bll\bl-\b-l\bla\bas\bst\bt-\b-k\bkb\bbd\bd-\b-m\bma\bac\bcr\bro\bo (\b(C\bC-\b-x\bx e\be)\b)
- Re-execute the last keyboard macro defined, by making the char-
+ Re-execute the last keyboard macro defined, by making the char-
acters in the macro appear as if typed at the keyboard.
M\bMi\bis\bsc\bce\bel\bll\bla\ban\bne\beo\bou\bus\bs
r\bre\be-\b-r\bre\bea\bad\bd-\b-i\bin\bni\bit\bt-\b-f\bfi\bil\ble\be (\b(C\bC-\b-x\bx C\bC-\b-r\br)\b)
- Read in the contents of the _\bi_\bn_\bp_\bu_\bt_\br_\bc file, and incorporate any
+ Read in the contents of the _\bi_\bn_\bp_\bu_\bt_\br_\bc file, and incorporate any
bindings or variable assignments found there.
a\bab\bbo\bor\brt\bt (\b(C\bC-\b-g\bg)\b)
- Abort the current editing command and ring the terminal's bell
+ Abort the current editing command and ring the terminal's bell
(subject to the setting of b\bbe\bel\bll\bl-\b-s\bst\bty\byl\ble\be).
d\bdo\bo-\b-u\bup\bpp\bpe\ber\brc\bca\bas\bse\be-\b-v\bve\ber\brs\bsi\bio\bon\bn (\b(M\bM-\b-a\ba,\b, M\bM-\b-b\bb,\b, M\bM-\b-_\bx,\b, .\b..\b..\b.)\b)
- If the metafied character _\bx is lowercase, run the command that
+ If the metafied character _\bx is lowercase, run the command that
is bound to the corresponding uppercase character.
p\bpr\bre\bef\bfi\bix\bx-\b-m\bme\bet\bta\ba (\b(E\bES\bSC\bC)\b)
Metafy the next character typed. E\bES\bSC\bC f\bf is equivalent to M\bMe\bet\bta\ba-\b-f\bf.
u\bun\bnd\bdo\bo (\b(C\bC-\b-_\b_,\b, C\bC-\b-x\bx C\bC-\b-u\bu)\b)
Incremental undo, separately remembered for each line.
r\bre\bev\bve\ber\brt\bt-\b-l\bli\bin\bne\be (\b(M\bM-\b-r\br)\b)
- Undo all changes made to this line. This is like executing the
- u\bun\bnd\bdo\bo command enough times to return the line to its initial
+ Undo all changes made to this line. This is like executing the
+ u\bun\bnd\bdo\bo command enough times to return the line to its initial
state.
t\bti\bil\bld\bde\be-\b-e\bex\bxp\bpa\ban\bnd\bd (\b(M\bM-\b-&\b&)\b)
Perform tilde expansion on the current word.
s\bse\bet\bt-\b-m\bma\bar\brk\bk (\b(C\bC-\b-@\b@,\b, M\bM-\b-<\b<s\bsp\bpa\bac\bce\be>\b>)\b)
- Set the mark to the point. If a numeric argument is supplied,
+ Set the mark to the point. If a numeric argument is supplied,
the mark is set to that position.
e\bex\bxc\bch\bha\ban\bng\bge\be-\b-p\bpo\boi\bin\bnt\bt-\b-a\ban\bnd\bd-\b-m\bma\bar\brk\bk (\b(C\bC-\b-x\bx C\bC-\b-x\bx)\b)
- Swap the point with the mark. The current cursor position is
- set to the saved position, and the old cursor position is saved
+ Swap the point with the mark. The current cursor position is
+ set to the saved position, and the old cursor position is saved
as the mark.
c\bch\bha\bar\bra\bac\bct\bte\ber\br-\b-s\bse\bea\bar\brc\bch\bh (\b(C\bC-\b-]\b])\b)
A character is read and point is moved to the next occurrence of
- that character. A negative count searches for previous occur-
+ that character. A negative count searches for previous occur-
rences.
c\bch\bha\bar\bra\bac\bct\bte\ber\br-\b-s\bse\bea\bar\brc\bch\bh-\b-b\bba\bac\bck\bkw\bwa\bar\brd\bd (\b(M\bM-\b-C\bC-\b-]\b])\b)
- A character is read and point is moved to the previous occur-
- rence of that character. A negative count searches for subse-
+ A character is read and point is moved to the previous occur-
+ rence of that character. A negative count searches for subse-
quent occurrences.
s\bsk\bki\bip\bp-\b-c\bcs\bsi\bi-\b-s\bse\beq\bqu\bue\ben\bnc\bce\be
- Read enough characters to consume a multi-key sequence such as
- those defined for keys like Home and End. Such sequences begin
+ Read enough characters to consume a multi-key sequence such as
+ those defined for keys like Home and End. Such sequences begin
with a Control Sequence Indicator (CSI), usually ESC-[. If this
- sequence is bound to "\[", keys producing such sequences will
- have no effect unless explicitly bound to a readline command,
- instead of inserting stray characters into the editing buffer.
+ sequence is bound to "\[", keys producing such sequences will
+ have no effect unless explicitly bound to a readline command,
+ instead of inserting stray characters into the editing buffer.
This is unbound by default, but usually bound to ESC-[.
i\bin\bns\bse\ber\brt\bt-\b-c\bco\bom\bmm\bme\ben\bnt\bt (\b(M\bM-\b-#\b#)\b)
- Without a numeric argument, the value of the readline c\bco\bom\bm-\b-
- m\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn variable is inserted at the beginning of the current
+ Without a numeric argument, the value of the readline c\bco\bom\bm-\b-
+ m\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn variable is inserted at the beginning of the current
line. If a numeric argument is supplied, this command acts as a
- toggle: if the characters at the beginning of the line do not
- match the value of c\bco\bom\bmm\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn, the value is inserted, other-
+ toggle: if the characters at the beginning of the line do not
+ match the value of c\bco\bom\bmm\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn, the value is inserted, other-
wise the characters in c\bco\bom\bmm\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn are deleted from the begin-
- ning of the line. In either case, the line is accepted as if a
- newline had been typed. The default value of c\bco\bom\bmm\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn
- causes this command to make the current line a shell comment.
- If a numeric argument causes the comment character to be
+ ning of the line. In either case, the line is accepted as if a
+ newline had been typed. The default value of c\bco\bom\bmm\bme\ben\bnt\bt-\b-b\bbe\beg\bgi\bin\bn
+ causes this command to make the current line a shell comment.
+ If a numeric argument causes the comment character to be
removed, the line will be executed by the shell.
g\bgl\blo\bob\bb-\b-c\bco\bom\bmp\bpl\ble\bet\bte\be-\b-w\bwo\bor\brd\bd (\b(M\bM-\b-g\bg)\b)
- The word before point is treated as a pattern for pathname
- expansion, with an asterisk implicitly appended. This pattern
- is used to generate a list of matching file names for possible
+ The word before point is treated as a pattern for pathname
+ expansion, with an asterisk implicitly appended. This pattern
+ is used to generate a list of matching file names for possible
completions.
g\bgl\blo\bob\bb-\b-e\bex\bxp\bpa\ban\bnd\bd-\b-w\bwo\bor\brd\bd (\b(C\bC-\b-x\bx *\b*)\b)
- The word before point is treated as a pattern for pathname
- expansion, and the list of matching file names is inserted,
- replacing the word. If a numeric argument is supplied, an
+ The word before point is treated as a pattern for pathname
+ expansion, and the list of matching file names is inserted,
+ replacing the word. If a numeric argument is supplied, an
asterisk is appended before pathname expansion.
g\bgl\blo\bob\bb-\b-l\bli\bis\bst\bt-\b-e\bex\bxp\bpa\ban\bns\bsi\bio\bon\bns\bs (\b(C\bC-\b-x\bx g\bg)\b)
- The list of expansions that would have been generated by
- g\bgl\blo\bob\bb-\b-e\bex\bxp\bpa\ban\bnd\bd-\b-w\bwo\bor\brd\bd is displayed, and the line is redrawn. If a
- numeric argument is supplied, an asterisk is appended before
+ The list of expansions that would have been generated by
+ g\bgl\blo\bob\bb-\b-e\bex\bxp\bpa\ban\bnd\bd-\b-w\bwo\bor\brd\bd is displayed, and the line is redrawn. If a
+ numeric argument is supplied, an asterisk is appended before
pathname expansion.
d\bdu\bum\bmp\bp-\b-f\bfu\bun\bnc\bct\bti\bio\bon\bns\bs
- Print all of the functions and their key bindings to the read-
+ Print all of the functions and their key bindings to the read-
line output stream. If a numeric argument is supplied, the out-
- put is formatted in such a way that it can be made part of an
+ put is formatted in such a way that it can be made part of an
_\bi_\bn_\bp_\bu_\bt_\br_\bc file.
d\bdu\bum\bmp\bp-\b-v\bva\bar\bri\bia\bab\bbl\ble\bes\bs
Print all of the settable readline variables and their values to
- the readline output stream. If a numeric argument is supplied,
- the output is formatted in such a way that it can be made part
+ the readline output stream. If a numeric argument is supplied,
+ the output is formatted in such a way that it can be made part
of an _\bi_\bn_\bp_\bu_\bt_\br_\bc file.
d\bdu\bum\bmp\bp-\b-m\bma\bac\bcr\bro\bos\bs
- Print all of the readline key sequences bound to macros and the
- strings they output. If a numeric argument is supplied, the
+ Print all of the readline key sequences bound to macros and the
+ strings they output. If a numeric argument is supplied, the
output is formatted in such a way that it can be made part of an
_\bi_\bn_\bp_\bu_\bt_\br_\bc file.
d\bdi\bis\bsp\bpl\bla\bay\by-\b-s\bsh\bhe\bel\bll\bl-\b-v\bve\ber\brs\bsi\bio\bon\bn (\b(C\bC-\b-x\bx C\bC-\b-v\bv)\b)
- Display version information about the current instance of b\bba\bas\bsh\bh.
+ Display version information about the current instance of b\bba\bas\bsh\bh.
P\bPr\bro\bog\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
- When word completion is attempted for an argument to a command for
- which a completion specification (a _\bc_\bo_\bm_\bp_\bs_\bp_\be_\bc) has been defined using
- the c\bco\bom\bmp\bpl\ble\bet\bte\be builtin (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below), the pro-
+ When word completion is attempted for an argument to a command for
+ which a completion specification (a _\bc_\bo_\bm_\bp_\bs_\bp_\be_\bc) has been defined using
+ the c\bco\bom\bmp\bpl\ble\bet\bte\be builtin (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below), the pro-
grammable completion facilities are invoked.
- First, the command name is identified. If the command word is the
- empty string (completion attempted at the beginning of an empty line),
- any compspec defined with the -\b-E\bE option to c\bco\bom\bmp\bpl\ble\bet\bte\be is used. If a
- compspec has been defined for that command, the compspec is used to
+ First, the command name is identified. If the command word is the
+ empty string (completion attempted at the beginning of an empty line),
+ any compspec defined with the -\b-E\bE option to c\bco\bom\bmp\bpl\ble\bet\bte\be is used. If a
+ compspec has been defined for that command, the compspec is used to
generate the list of possible completions for the word. If the command
- word is a full pathname, a compspec for the full pathname is searched
- for first. If no compspec is found for the full pathname, an attempt
- is made to find a compspec for the portion following the final slash.
- If those searches do not result in a compspec, any compspec defined
+ word is a full pathname, a compspec for the full pathname is searched
+ for first. If no compspec is found for the full pathname, an attempt
+ is made to find a compspec for the portion following the final slash.
+ If those searches do not result in a compspec, any compspec defined
with the -\b-D\bD option to c\bco\bom\bmp\bpl\ble\bet\bte\be is used as the default.
- Once a compspec has been found, it is used to generate the list of
- matching words. If a compspec is not found, the default b\bba\bas\bsh\bh comple-
+ Once a compspec has been found, it is used to generate the list of
+ matching words. If a compspec is not found, the default b\bba\bas\bsh\bh comple-
tion as described above under C\bCo\bom\bmp\bpl\ble\bet\bti\bin\bng\bg is performed.
- First, the actions specified by the compspec are used. Only matches
- which are prefixed by the word being completed are returned. When the
- -\b-f\bf or -\b-d\bd option is used for filename or directory name completion, the
+ First, the actions specified by the compspec are used. Only matches
+ which are prefixed by the word being completed are returned. When the
+ -\b-f\bf or -\b-d\bd option is used for filename or directory name completion, the
shell variable F\bFI\bIG\bGN\bNO\bOR\bRE\bE is used to filter the matches.
- Any completions specified by a pathname expansion pattern to the -\b-G\bG
+ Any completions specified by a pathname expansion pattern to the -\b-G\bG
option are generated next. The words generated by the pattern need not
- match the word being completed. The G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE shell variable is not
+ match the word being completed. The G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE shell variable is not
used to filter the matches, but the F\bFI\bIG\bGN\bNO\bOR\bRE\bE variable is used.
- Next, the string specified as the argument to the -\b-W\bW option is consid-
- ered. The string is first split using the characters in the I\bIF\bFS\bS spe-
- cial variable as delimiters. Shell quoting is honored. Each word is
- then expanded using brace expansion, tilde expansion, parameter and
- variable expansion, command substitution, and arithmetic expansion, as
+ Next, the string specified as the argument to the -\b-W\bW option is consid-
+ ered. The string is first split using the characters in the I\bIF\bFS\bS spe-
+ cial variable as delimiters. Shell quoting is honored. Each word is
+ then expanded using brace expansion, tilde expansion, parameter and
+ variable expansion, command substitution, and arithmetic expansion, as
described above under E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN. The results are split using the rules
described above under W\bWo\bor\brd\bd S\bSp\bpl\bli\bit\btt\bti\bin\bng\bg. The results of the expansion are
prefix-matched against the word being completed, and the matching words
become the possible completions.
- After these matches have been generated, any shell function or command
- specified with the -\b-F\bF and -\b-C\bC options is invoked. When the command or
+ After these matches have been generated, any shell function or command
+ specified with the -\b-F\bF and -\b-C\bC options is invoked. When the command or
function is invoked, the C\bCO\bOM\bMP\bP_\b_L\bLI\bIN\bNE\bE, C\bCO\bOM\bMP\bP_\b_P\bPO\bOI\bIN\bNT\bT, C\bCO\bOM\bMP\bP_\b_K\bKE\bEY\bY, and C\bCO\bOM\bMP\bP_\b_T\bTY\bYP\bPE\bE
variables are assigned values as described above under S\bSh\bhe\bel\bll\bl V\bVa\bar\bri\bia\bab\bbl\ble\bes\bs.
- If a shell function is being invoked, the C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDS\bS and C\bCO\bOM\bMP\bP_\b_C\bCW\bWO\bOR\bRD\bD
- variables are also set. When the function or command is invoked, the
- first argument is the name of the command whose arguments are being
- completed, the second argument is the word being completed, and the
- third argument is the word preceding the word being completed on the
- current command line. No filtering of the generated completions
- against the word being completed is performed; the function or command
+ If a shell function is being invoked, the C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDS\bS and C\bCO\bOM\bMP\bP_\b_C\bCW\bWO\bOR\bRD\bD
+ variables are also set. When the function or command is invoked, the
+ first argument is the name of the command whose arguments are being
+ completed, the second argument is the word being completed, and the
+ third argument is the word preceding the word being completed on the
+ current command line. No filtering of the generated completions
+ against the word being completed is performed; the function or command
has complete freedom in generating the matches.
- Any function specified with -\b-F\bF is invoked first. The function may use
- any of the shell facilities, including the c\bco\bom\bmp\bpg\bge\ben\bn builtin described
- below, to generate the matches. It must put the possible completions
+ Any function specified with -\b-F\bF is invoked first. The function may use
+ any of the shell facilities, including the c\bco\bom\bmp\bpg\bge\ben\bn builtin described
+ below, to generate the matches. It must put the possible completions
in the C\bCO\bOM\bMP\bPR\bRE\bEP\bPL\bLY\bY array variable.
- Next, any command specified with the -\b-C\bC option is invoked in an envi-
- ronment equivalent to command substitution. It should print a list of
- completions, one per line, to the standard output. Backslash may be
+ Next, any command specified with the -\b-C\bC option is invoked in an envi-
+ ronment equivalent to command substitution. It should print a list of
+ completions, one per line, to the standard output. Backslash may be
used to escape a newline, if necessary.
- After all of the possible completions are generated, any filter speci-
- fied with the -\b-X\bX option is applied to the list. The filter is a pat-
- tern as used for pathname expansion; a &\b& in the pattern is replaced
- with the text of the word being completed. A literal &\b& may be escaped
- with a backslash; the backslash is removed before attempting a match.
- Any completion that matches the pattern will be removed from the list.
+ After all of the possible completions are generated, any filter speci-
+ fied with the -\b-X\bX option is applied to the list. The filter is a pat-
+ tern as used for pathname expansion; a &\b& in the pattern is replaced
+ with the text of the word being completed. A literal &\b& may be escaped
+ with a backslash; the backslash is removed before attempting a match.
+ Any completion that matches the pattern will be removed from the list.
A leading !\b! negates the pattern; in this case any completion not match-
ing the pattern will be removed.
added to each member of the completion list, and the result is returned
to the readline completion code as the list of possible completions.
- If the previously-applied actions do not generate any matches, and the
- -\b-o\bo d\bdi\bir\brn\bna\bam\bme\bes\bs option was supplied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec was
+ If the previously-applied actions do not generate any matches, and the
+ -\b-o\bo d\bdi\bir\brn\bna\bam\bme\bes\bs option was supplied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec was
defined, directory name completion is attempted.
- If the -\b-o\bo p\bpl\blu\bus\bsd\bdi\bir\brs\bs option was supplied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec
+ If the -\b-o\bo p\bpl\blu\bus\bsd\bdi\bir\brs\bs option was supplied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec
was defined, directory name completion is attempted and any matches are
added to the results of the other actions.
- By default, if a compspec is found, whatever it generates is returned
- to the completion code as the full set of possible completions. The
+ By default, if a compspec is found, whatever it generates is returned
+ to the completion code as the full set of possible completions. The
default b\bba\bas\bsh\bh completions are not attempted, and the readline default of
filename completion is disabled. If the -\b-o\bo b\bba\bas\bsh\bhd\bde\bef\bfa\bau\bul\blt\bt option was sup-
- plied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec was defined, the b\bba\bas\bsh\bh default com-
+ plied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec was defined, the b\bba\bas\bsh\bh default com-
pletions are attempted if the compspec generates no matches. If the -\b-o\bo
- d\bde\bef\bfa\bau\bul\blt\bt option was supplied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec was defined,
- readline's default completion will be performed if the compspec (and,
+ d\bde\bef\bfa\bau\bul\blt\bt option was supplied to c\bco\bom\bmp\bpl\ble\bet\bte\be when the compspec was defined,
+ readline's default completion will be performed if the compspec (and,
if attempted, the default b\bba\bas\bsh\bh completions) generate no matches.
- When a compspec indicates that directory name completion is desired,
- the programmable completion functions force readline to append a slash
- to completed names which are symbolic links to directories, subject to
- the value of the m\bma\bar\brk\bk-\b-d\bdi\bir\bre\bec\bct\bto\bor\bri\bie\bes\bs readline variable, regardless of the
+ When a compspec indicates that directory name completion is desired,
+ the programmable completion functions force readline to append a slash
+ to completed names which are symbolic links to directories, subject to
+ the value of the m\bma\bar\brk\bk-\b-d\bdi\bir\bre\bec\bct\bto\bor\bri\bie\bes\bs readline variable, regardless of the
setting of the m\bma\bar\brk\bk-\b-s\bsy\bym\bml\bli\bin\bnk\bke\bed\bd-\b-d\bdi\bir\bre\bec\bct\bto\bor\bri\bie\bes\bs readline variable.
- There is some support for dynamically modifying completions. This is
- most useful when used in combination with a default completion speci-
- fied with c\bco\bom\bmp\bpl\ble\bet\bte\be -\b-D\bD. It's possible for shell functions executed as
- completion handlers to indicate that completion should be retried by
- returning an exit status of 124. If a shell function returns 124, and
+ There is some support for dynamically modifying completions. This is
+ most useful when used in combination with a default completion speci-
+ fied with c\bco\bom\bmp\bpl\ble\bet\bte\be -\b-D\bD. It's possible for shell functions executed as
+ completion handlers to indicate that completion should be retried by
+ returning an exit status of 124. If a shell function returns 124, and
changes the compspec associated with the command on which completion is
- being attempted (supplied as the first argument when the function is
+ being attempted (supplied as the first argument when the function is
executed), programmable completion restarts from the beginning, with an
- attempt to find a new compspec for that command. This allows a set of
- completions to be built dynamically as completion is attempted, rather
+ attempt to find a new compspec for that command. This allows a set of
+ completions to be built dynamically as completion is attempted, rather
than being loaded all at once.
- For instance, assuming that there is a library of compspecs, each kept
- in a file corresponding to the name of the command, the following
+ For instance, assuming that there is a library of compspecs, each kept
+ in a file corresponding to the name of the command, the following
default completion function would load completions dynamically:
_completion_loader()
H\bHI\bIS\bST\bTO\bOR\bRY\bY
- When the -\b-o\bo h\bhi\bis\bst\bto\bor\bry\by option to the s\bse\bet\bt builtin is enabled, the shell
+ When the -\b-o\bo h\bhi\bis\bst\bto\bor\bry\by option to the s\bse\bet\bt builtin is enabled, the shell
provides access to the _\bc_\bo_\bm_\bm_\ba_\bn_\bd _\bh_\bi_\bs_\bt_\bo_\br_\by, the list of commands previously
- typed. The value of the H\bHI\bIS\bST\bTS\bSI\bIZ\bZE\bE variable is used as the number of
+ typed. The value of the H\bHI\bIS\bST\bTS\bSI\bIZ\bZE\bE variable is used as the number of
commands to save in a history list. The text of the last H\bHI\bIS\bST\bTS\bSI\bIZ\bZE\bE com-
- mands (default 500) is saved. The shell stores each command in the
- history list prior to parameter and variable expansion (see E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN
- above) but after history expansion is performed, subject to the values
+ mands (default 500) is saved. The shell stores each command in the
+ history list prior to parameter and variable expansion (see E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN
+ above) but after history expansion is performed, subject to the values
of the shell variables H\bHI\bIS\bST\bTI\bIG\bGN\bNO\bOR\bRE\bE and H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL.
On startup, the history is initialized from the file named by the vari-
- able H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE (default _\b~_\b/_\b._\bb_\ba_\bs_\bh_\b__\bh_\bi_\bs_\bt_\bo_\br_\by). The file named by the value
- of H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE is truncated, if necessary, to contain no more than the
- number of lines specified by the value of H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bES\bSI\bIZ\bZE\bE. When the his-
- tory file is read, lines beginning with the history comment character
- followed immediately by a digit are interpreted as timestamps for the
- preceding history line. These timestamps are optionally displayed
- depending on the value of the H\bHI\bIS\bST\bTT\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT variable. When an inter-
- active shell exits, the last $\b$H\bHI\bIS\bST\bTS\bSI\bIZ\bZE\bE lines are copied from the his-
+ able H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE (default _\b~_\b/_\b._\bb_\ba_\bs_\bh_\b__\bh_\bi_\bs_\bt_\bo_\br_\by). The file named by the value
+ of H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE is truncated, if necessary, to contain no more than the
+ number of lines specified by the value of H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bES\bSI\bIZ\bZE\bE. When the his-
+ tory file is read, lines beginning with the history comment character
+ followed immediately by a digit are interpreted as timestamps for the
+ preceding history line. These timestamps are optionally displayed
+ depending on the value of the H\bHI\bIS\bST\bTT\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT variable. When an inter-
+ active shell exits, the last $\b$H\bHI\bIS\bST\bTS\bSI\bIZ\bZE\bE lines are copied from the his-
tory list to $\b$H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE. If the h\bhi\bis\bst\bta\bap\bpp\bpe\ben\bnd\bd shell option is enabled (see
the description of s\bsh\bho\bop\bpt\bt under S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below), the lines
- are appended to the history file, otherwise the history file is over-
- written. If H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE is unset, or if the history file is unwritable,
- the history is not saved. If the H\bHI\bIS\bST\bTT\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT variable is set, time
+ are appended to the history file, otherwise the history file is over-
+ written. If H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE is unset, or if the history file is unwritable,
+ the history is not saved. If the H\bHI\bIS\bST\bTT\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT variable is set, time
stamps are written to the history file, marked with the history comment
- character, so they may be preserved across shell sessions. This uses
+ character, so they may be preserved across shell sessions. This uses
the history comment character to distinguish timestamps from other his-
tory lines. After saving the history, the history file is truncated to
- contain no more than H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bES\bSI\bIZ\bZE\bE lines. If H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bES\bSI\bIZ\bZE\bE is not set,
+ contain no more than H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bES\bSI\bIZ\bZE\bE lines. If H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bES\bSI\bIZ\bZE\bE is not set,
no truncation is performed.
- The builtin command f\bfc\bc (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below) may be used
+ The builtin command f\bfc\bc (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below) may be used
to list or edit and re-execute a portion of the history list. The h\bhi\bis\bs-\b-
- t\bto\bor\bry\by builtin may be used to display or modify the history list and
- manipulate the history file. When using command-line editing, search
- commands are available in each editing mode that provide access to the
+ t\bto\bor\bry\by builtin may be used to display or modify the history list and
+ manipulate the history file. When using command-line editing, search
+ commands are available in each editing mode that provide access to the
history list.
- The shell allows control over which commands are saved on the history
+ The shell allows control over which commands are saved on the history
list. The H\bHI\bIS\bST\bTC\bCO\bON\bNT\bTR\bRO\bOL\bL and H\bHI\bIS\bST\bTI\bIG\bGN\bNO\bOR\bRE\bE variables may be set to cause the
shell to save only a subset of the commands entered. The c\bcm\bmd\bdh\bhi\bis\bst\bt shell
- option, if enabled, causes the shell to attempt to save each line of a
- multi-line command in the same history entry, adding semicolons where
- necessary to preserve syntactic correctness. The l\bli\bit\bth\bhi\bis\bst\bt shell option
- causes the shell to save the command with embedded newlines instead of
+ option, if enabled, causes the shell to attempt to save each line of a
+ multi-line command in the same history entry, adding semicolons where
+ necessary to preserve syntactic correctness. The l\bli\bit\bth\bhi\bis\bst\bt shell option
+ causes the shell to save the command with embedded newlines instead of
semicolons. See the description of the s\bsh\bho\bop\bpt\bt builtin below under S\bSH\bHE\bEL\bLL\bL
B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS for information on setting and unsetting shell
options.
H\bHI\bIS\bST\bTO\bOR\bRY\bY E\bEX\bXP\bPA\bAN\bNS\bSI\bIO\bON\bN
- The shell supports a history expansion feature that is similar to the
- history expansion in c\bcs\bsh\bh.\b. This section describes what syntax features
- are available. This feature is enabled by default for interactive
+ The shell supports a history expansion feature that is similar to the
+ history expansion in c\bcs\bsh\bh.\b. This section describes what syntax features
+ are available. This feature is enabled by default for interactive
shells, and can be disabled using the +\b+H\bH option to the s\bse\bet\bt builtin com-
mand (see S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS below). Non-interactive shells do not
perform history expansion by default.
History expansions introduce words from the history list into the input
- stream, making it easy to repeat commands, insert the arguments to a
+ stream, making it easy to repeat commands, insert the arguments to a
previous command into the current input line, or fix errors in previous
commands quickly.
- History expansion is performed immediately after a complete line is
- read, before the shell breaks it into words. It takes place in two
- parts. The first is to determine which line from the history list to
+ History expansion is performed immediately after a complete line is
+ read, before the shell breaks it into words. It takes place in two
+ parts. The first is to determine which line from the history list to
use during substitution. The second is to select portions of that line
for inclusion into the current one. The line selected from the history
- is the _\be_\bv_\be_\bn_\bt, and the portions of that line that are acted upon are
- _\bw_\bo_\br_\bd_\bs. Various _\bm_\bo_\bd_\bi_\bf_\bi_\be_\br_\bs are available to manipulate the selected
+ is the _\be_\bv_\be_\bn_\bt, and the portions of that line that are acted upon are
+ _\bw_\bo_\br_\bd_\bs. Various _\bm_\bo_\bd_\bi_\bf_\bi_\be_\br_\bs are available to manipulate the selected
words. The line is broken into words in the same fashion as when read-
- ing input, so that several _\bm_\be_\bt_\ba_\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br-separated words surrounded by
- quotes are considered one word. History expansions are introduced by
- the appearance of the history expansion character, which is !\b! by
- default. Only backslash (\\b\) and single quotes can quote the history
+ ing input, so that several _\bm_\be_\bt_\ba_\bc_\bh_\ba_\br_\ba_\bc_\bt_\be_\br-separated words surrounded by
+ quotes are considered one word. History expansions are introduced by
+ the appearance of the history expansion character, which is !\b! by
+ default. Only backslash (\\b\) and single quotes can quote the history
expansion character.
- Several characters inhibit history expansion if found immediately fol-
- lowing the history expansion character, even if it is unquoted: space,
- tab, newline, carriage return, and =\b=. If the e\bex\bxt\btg\bgl\blo\bob\bb shell option is
+ Several characters inhibit history expansion if found immediately fol-
+ lowing the history expansion character, even if it is unquoted: space,
+ tab, newline, carriage return, and =\b=. If the e\bex\bxt\btg\bgl\blo\bob\bb shell option is
enabled, (\b( will also inhibit expansion.
- Several shell options settable with the s\bsh\bho\bop\bpt\bt builtin may be used to
- tailor the behavior of history expansion. If the h\bhi\bis\bst\btv\bve\ber\bri\bif\bfy\by shell
+ Several shell options settable with the s\bsh\bho\bop\bpt\bt builtin may be used to
+ tailor the behavior of history expansion. If the h\bhi\bis\bst\btv\bve\ber\bri\bif\bfy\by shell
option is enabled (see the description of the s\bsh\bho\bop\bpt\bt builtin below), and
- r\bre\bea\bad\bdl\bli\bin\bne\be is being used, history substitutions are not immediately
- passed to the shell parser. Instead, the expanded line is reloaded
+ r\bre\bea\bad\bdl\bli\bin\bne\be is being used, history substitutions are not immediately
+ passed to the shell parser. Instead, the expanded line is reloaded
into the r\bre\bea\bad\bdl\bli\bin\bne\be editing buffer for further modification. If r\bre\bea\bad\bdl\bli\bin\bne\be
- is being used, and the h\bhi\bis\bst\btr\bre\bee\bed\bdi\bit\bt shell option is enabled, a failed
- history substitution will be reloaded into the r\bre\bea\bad\bdl\bli\bin\bne\be editing buffer
- for correction. The -\b-p\bp option to the h\bhi\bis\bst\bto\bor\bry\by builtin command may be
- used to see what a history expansion will do before using it. The -\b-s\bs
+ is being used, and the h\bhi\bis\bst\btr\bre\bee\bed\bdi\bit\bt shell option is enabled, a failed
+ history substitution will be reloaded into the r\bre\bea\bad\bdl\bli\bin\bne\be editing buffer
+ for correction. The -\b-p\bp option to the h\bhi\bis\bst\bto\bor\bry\by builtin command may be
+ used to see what a history expansion will do before using it. The -\b-s\bs
option to the h\bhi\bis\bst\bto\bor\bry\by builtin may be used to add commands to the end of
- the history list without actually executing them, so that they are
+ the history list without actually executing them, so that they are
available for subsequent recall.
- The shell allows control of the various characters used by the history
+ The shell allows control of the various characters used by the history
expansion mechanism (see the description of h\bhi\bis\bst\btc\bch\bha\bar\brs\bs above under S\bSh\bhe\bel\bll\bl
- V\bVa\bar\bri\bia\bab\bbl\ble\bes\bs). The shell uses the history comment character to mark his-
+ V\bVa\bar\bri\bia\bab\bbl\ble\bes\bs). The shell uses the history comment character to mark his-
tory timestamps when writing the history file.
E\bEv\bve\ben\bnt\bt D\bDe\bes\bsi\big\bgn\bna\bat\bto\bor\brs\bs
- An event designator is a reference to a command line entry in the his-
- tory list. Unless the reference is absolute, events are relative to
+ An event designator is a reference to a command line entry in the his-
+ tory list. Unless the reference is absolute, events are relative to
the current position in the history list.
- !\b! Start a history substitution, except when followed by a b\bbl\bla\ban\bnk\bk,
- newline, carriage return, = or ( (when the e\bex\bxt\btg\bgl\blo\bob\bb shell option
+ !\b! Start a history substitution, except when followed by a b\bbl\bla\ban\bnk\bk,
+ newline, carriage return, = or ( (when the e\bex\bxt\btg\bgl\blo\bob\bb shell option
is enabled using the s\bsh\bho\bop\bpt\bt builtin).
!\b!_\bn Refer to command line _\bn.
!\b!-\b-_\bn Refer to the current command minus _\bn.
!\b!!\b! Refer to the previous command. This is a synonym for `!-1'.
!\b!_\bs_\bt_\br_\bi_\bn_\bg
- Refer to the most recent command preceding the current position
+ Refer to the most recent command preceding the current position
in the history list starting with _\bs_\bt_\br_\bi_\bn_\bg.
!\b!?\b?_\bs_\bt_\br_\bi_\bn_\bg[\b[?\b?]\b]
Refer to the most recent command preceding the current postition
- in the history list containing _\bs_\bt_\br_\bi_\bn_\bg. The trailing ?\b? may be
+ in the history list containing _\bs_\bt_\br_\bi_\bn_\bg. The trailing ?\b? may be
omitted if _\bs_\bt_\br_\bi_\bn_\bg is followed immediately by a newline.
^\b^_\bs_\bt_\br_\bi_\bn_\bg_\b1^\b^_\bs_\bt_\br_\bi_\bn_\bg_\b2^\b^
- Quick substitution. Repeat the previous command, replacing
- _\bs_\bt_\br_\bi_\bn_\bg_\b1 with _\bs_\bt_\br_\bi_\bn_\bg_\b2. Equivalent to ``!!:s/_\bs_\bt_\br_\bi_\bn_\bg_\b1/_\bs_\bt_\br_\bi_\bn_\bg_\b2/''
+ Quick substitution. Repeat the previous command, replacing
+ _\bs_\bt_\br_\bi_\bn_\bg_\b1 with _\bs_\bt_\br_\bi_\bn_\bg_\b2. Equivalent to ``!!:s/_\bs_\bt_\br_\bi_\bn_\bg_\b1/_\bs_\bt_\br_\bi_\bn_\bg_\b2/''
(see M\bMo\bod\bdi\bif\bfi\bie\ber\brs\bs below).
!\b!#\b# The entire command line typed so far.
W\bWo\bor\brd\bd D\bDe\bes\bsi\big\bgn\bna\bat\bto\bor\brs\bs
- Word designators are used to select desired words from the event. A :\b:
- separates the event specification from the word designator. It may be
- omitted if the word designator begins with a ^\b^, $\b$, *\b*, -\b-, or %\b%. Words
- are numbered from the beginning of the line, with the first word being
- denoted by 0 (zero). Words are inserted into the current line sepa-
+ Word designators are used to select desired words from the event. A :\b:
+ separates the event specification from the word designator. It may be
+ omitted if the word designator begins with a ^\b^, $\b$, *\b*, -\b-, or %\b%. Words
+ are numbered from the beginning of the line, with the first word being
+ denoted by 0 (zero). Words are inserted into the current line sepa-
rated by single spaces.
0\b0 (\b(z\bze\ber\bro\bo)\b)
$\b$ The last argument.
%\b% The word matched by the most recent `?_\bs_\bt_\br_\bi_\bn_\bg?' search.
_\bx-\b-_\by A range of words; `-_\by' abbreviates `0-_\by'.
- *\b* All of the words but the zeroth. This is a synonym for `_\b1_\b-_\b$'.
- It is not an error to use *\b* if there is just one word in the
+ *\b* All of the words but the zeroth. This is a synonym for `_\b1_\b-_\b$'.
+ It is not an error to use *\b* if there is just one word in the
event; the empty string is returned in that case.
x\bx*\b* Abbreviates _\bx_\b-_\b$.
x\bx-\b- Abbreviates _\bx_\b-_\b$ like x\bx*\b*, but omits the last word.
- If a word designator is supplied without an event specification, the
+ If a word designator is supplied without an event specification, the
previous command is used as the event.
M\bMo\bod\bdi\bif\bfi\bie\ber\brs\bs
- After the optional word designator, there may appear a sequence of one
+ After the optional word designator, there may appear a sequence of one
or more of the following modifiers, each preceded by a `:'.
h\bh Remove a trailing file name component, leaving only the head.
e\be Remove all but the trailing suffix.
p\bp Print the new command but do not execute it.
q\bq Quote the substituted words, escaping further substitutions.
- x\bx Quote the substituted words as with q\bq, but break into words at
+ x\bx Quote the substituted words as with q\bq, but break into words at
b\bbl\bla\ban\bnk\bks\bs and newlines.
s\bs/\b/_\bo_\bl_\bd/\b/_\bn_\be_\bw/\b/
- Substitute _\bn_\be_\bw for the first occurrence of _\bo_\bl_\bd in the event
- line. Any delimiter can be used in place of /. The final
- delimiter is optional if it is the last character of the event
- line. The delimiter may be quoted in _\bo_\bl_\bd and _\bn_\be_\bw with a single
- backslash. If & appears in _\bn_\be_\bw, it is replaced by _\bo_\bl_\bd. A sin-
- gle backslash will quote the &. If _\bo_\bl_\bd is null, it is set to
- the last _\bo_\bl_\bd substituted, or, if no previous history substitu-
+ Substitute _\bn_\be_\bw for the first occurrence of _\bo_\bl_\bd in the event
+ line. Any delimiter can be used in place of /. The final
+ delimiter is optional if it is the last character of the event
+ line. The delimiter may be quoted in _\bo_\bl_\bd and _\bn_\be_\bw with a single
+ backslash. If & appears in _\bn_\be_\bw, it is replaced by _\bo_\bl_\bd. A sin-
+ gle backslash will quote the &. If _\bo_\bl_\bd is null, it is set to
+ the last _\bo_\bl_\bd substituted, or, if no previous history substitu-
tions took place, the last _\bs_\bt_\br_\bi_\bn_\bg in a !\b!?\b?_\bs_\bt_\br_\bi_\bn_\bg[\b[?\b?]\b] search.
&\b& Repeat the previous substitution.
g\bg Cause changes to be applied over the entire event line. This is
- used in conjunction with `:\b:s\bs' (e.g., `:\b:g\bgs\bs/\b/_\bo_\bl_\bd/\b/_\bn_\be_\bw/\b/') or `:\b:&\b&'.
- If used with `:\b:s\bs', any delimiter can be used in place of /, and
- the final delimiter is optional if it is the last character of
+ used in conjunction with `:\b:s\bs' (e.g., `:\b:g\bgs\bs/\b/_\bo_\bl_\bd/\b/_\bn_\be_\bw/\b/') or `:\b:&\b&'.
+ If used with `:\b:s\bs', any delimiter can be used in place of /, and
+ the final delimiter is optional if it is the last character of
the event line. An a\ba may be used as a synonym for g\bg.
- G\bG Apply the following `s\bs' modifier once to each word in the event
+ G\bG Apply the following `s\bs' modifier once to each word in the event
line.
S\bSH\bHE\bEL\bLL\bL B\bBU\bUI\bIL\bLT\bTI\bIN\bN C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS
Unless otherwise noted, each builtin command documented in this section
as accepting options preceded by -\b- accepts -\b--\b- to signify the end of the
- options. The :\b:, t\btr\bru\bue\be, f\bfa\bal\bls\bse\be, and t\bte\bes\bst\bt builtins do not accept options
+ options. The :\b:, t\btr\bru\bue\be, f\bfa\bal\bls\bse\be, and t\bte\bes\bst\bt builtins do not accept options
and do not treat -\b--\b- specially. The e\bex\bxi\bit\bt, l\blo\bog\bgo\bou\but\bt, b\bbr\bre\bea\bak\bk, c\bco\bon\bnt\bti\bin\bnu\bue\be, l\ble\bet\bt,
- and s\bsh\bhi\bif\bft\bt builtins accept and process arguments beginning with -\b- with-
- out requiring -\b--\b-. Other builtins that accept arguments but are not
- specified as accepting options interpret arguments beginning with -\b- as
+ and s\bsh\bhi\bif\bft\bt builtins accept and process arguments beginning with -\b- with-
+ out requiring -\b--\b-. Other builtins that accept arguments but are not
+ specified as accepting options interpret arguments beginning with -\b- as
invalid options and require -\b--\b- to prevent this interpretation.
:\b: [_\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs]
- No effect; the command does nothing beyond expanding _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs
- and performing any specified redirections. A zero exit code is
+ No effect; the command does nothing beyond expanding _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs
+ and performing any specified redirections. A zero exit code is
returned.
.\b. _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be [_\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs]
s\bso\bou\bur\brc\bce\be _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be [_\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs]
- Read and execute commands from _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be in the current shell
- environment and return the exit status of the last command exe-
+ Read and execute commands from _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be in the current shell
+ environment and return the exit status of the last command exe-
cuted from _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be. If _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be does not contain a slash, file
- names in P\bPA\bAT\bTH\bH are used to find the directory containing _\bf_\bi_\bl_\be_\b-
- _\bn_\ba_\bm_\be. The file searched for in P\bPA\bAT\bTH\bH need not be executable.
- When b\bba\bas\bsh\bh is not in _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be, the current directory is
- searched if no file is found in P\bPA\bAT\bTH\bH. If the s\bso\bou\bur\brc\bce\bep\bpa\bat\bth\bh option
- to the s\bsh\bho\bop\bpt\bt builtin command is turned off, the P\bPA\bAT\bTH\bH is not
- searched. If any _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs are supplied, they become the posi-
- tional parameters when _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be is executed. Otherwise the
- positional parameters are unchanged. The return status is the
- status of the last command exited within the script (0 if no
- commands are executed), and false if _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be is not found or
+ names in P\bPA\bAT\bTH\bH are used to find the directory containing _\bf_\bi_\bl_\be_\b-
+ _\bn_\ba_\bm_\be. The file searched for in P\bPA\bAT\bTH\bH need not be executable.
+ When b\bba\bas\bsh\bh is not in _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be, the current directory is
+ searched if no file is found in P\bPA\bAT\bTH\bH. If the s\bso\bou\bur\brc\bce\bep\bpa\bat\bth\bh option
+ to the s\bsh\bho\bop\bpt\bt builtin command is turned off, the P\bPA\bAT\bTH\bH is not
+ searched. If any _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs are supplied, they become the posi-
+ tional parameters when _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be is executed. Otherwise the
+ positional parameters are unchanged. The return status is the
+ status of the last command exited within the script (0 if no
+ commands are executed), and false if _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be is not found or
cannot be read.
a\bal\bli\bia\bas\bs [-\b-p\bp] [_\bn_\ba_\bm_\be[=_\bv_\ba_\bl_\bu_\be] ...]
A\bAl\bli\bia\bas\bs with no arguments or with the -\b-p\bp option prints the list of
- aliases in the form a\bal\bli\bia\bas\bs _\bn_\ba_\bm_\be=_\bv_\ba_\bl_\bu_\be on standard output. When
- arguments are supplied, an alias is defined for each _\bn_\ba_\bm_\be whose
+ aliases in the form a\bal\bli\bia\bas\bs _\bn_\ba_\bm_\be=_\bv_\ba_\bl_\bu_\be on standard output. When
+ arguments are supplied, an alias is defined for each _\bn_\ba_\bm_\be whose
_\bv_\ba_\bl_\bu_\be is given. A trailing space in _\bv_\ba_\bl_\bu_\be causes the next word
to be checked for alias substitution when the alias is expanded.
- For each _\bn_\ba_\bm_\be in the argument list for which no _\bv_\ba_\bl_\bu_\be is sup-
- plied, the name and value of the alias is printed. A\bAl\bli\bia\bas\bs
- returns true unless a _\bn_\ba_\bm_\be is given for which no alias has been
+ For each _\bn_\ba_\bm_\be in the argument list for which no _\bv_\ba_\bl_\bu_\be is sup-
+ plied, the name and value of the alias is printed. A\bAl\bli\bia\bas\bs
+ returns true unless a _\bn_\ba_\bm_\be is given for which no alias has been
defined.
b\bbg\bg [_\bj_\bo_\bb_\bs_\bp_\be_\bc ...]
- Resume each suspended job _\bj_\bo_\bb_\bs_\bp_\be_\bc in the background, as if it
+ Resume each suspended job _\bj_\bo_\bb_\bs_\bp_\be_\bc in the background, as if it
had been started with &\b&. If _\bj_\bo_\bb_\bs_\bp_\be_\bc is not present, the shell's
- notion of the _\bc_\bu_\br_\br_\be_\bn_\bt _\bj_\bo_\bb is used. b\bbg\bg _\bj_\bo_\bb_\bs_\bp_\be_\bc returns 0 unless
- run when job control is disabled or, when run with job control
- enabled, any specified _\bj_\bo_\bb_\bs_\bp_\be_\bc was not found or was started
+ notion of the _\bc_\bu_\br_\br_\be_\bn_\bt _\bj_\bo_\bb is used. b\bbg\bg _\bj_\bo_\bb_\bs_\bp_\be_\bc returns 0 unless
+ run when job control is disabled or, when run with job control
+ enabled, any specified _\bj_\bo_\bb_\bs_\bp_\be_\bc was not found or was started
without job control.
b\bbi\bin\bnd\bd [-\b-m\bm _\bk_\be_\by_\bm_\ba_\bp] [-\b-l\blp\bps\bsv\bvP\bPS\bSV\bV]
b\bbi\bin\bnd\bd [-\b-m\bm _\bk_\be_\by_\bm_\ba_\bp] -\b-x\bx _\bk_\be_\by_\bs_\be_\bq:_\bs_\bh_\be_\bl_\bl_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd
b\bbi\bin\bnd\bd [-\b-m\bm _\bk_\be_\by_\bm_\ba_\bp] _\bk_\be_\by_\bs_\be_\bq:_\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be
b\bbi\bin\bnd\bd _\br_\be_\ba_\bd_\bl_\bi_\bn_\be_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd
- Display current r\bre\bea\bad\bdl\bli\bin\bne\be key and function bindings, bind a key
- sequence to a r\bre\bea\bad\bdl\bli\bin\bne\be function or macro, or set a r\bre\bea\bad\bdl\bli\bin\bne\be
- variable. Each non-option argument is a command as it would
- appear in _\b._\bi_\bn_\bp_\bu_\bt_\br_\bc, but each binding or command must be passed
- as a separate argument; e.g., '"\C-x\C-r": re-read-init-file'.
+ Display current r\bre\bea\bad\bdl\bli\bin\bne\be key and function bindings, bind a key
+ sequence to a r\bre\bea\bad\bdl\bli\bin\bne\be function or macro, or set a r\bre\bea\bad\bdl\bli\bin\bne\be
+ variable. Each non-option argument is a command as it would
+ appear in _\b._\bi_\bn_\bp_\bu_\bt_\br_\bc, but each binding or command must be passed
+ as a separate argument; e.g., '"\C-x\C-r": re-read-init-file'.
Options, if supplied, have the following meanings:
-\b-m\bm _\bk_\be_\by_\bm_\ba_\bp
Use _\bk_\be_\by_\bm_\ba_\bp as the keymap to be affected by the subsequent
bindings. Acceptable _\bk_\be_\by_\bm_\ba_\bp names are _\be_\bm_\ba_\bc_\bs_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\b-
- _\bd_\ba_\br_\bd_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bm_\be_\bt_\ba_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bc_\bt_\bl_\bx_\b, _\bv_\bi_\b, _\bv_\bi_\b-_\bm_\bo_\bv_\be_\b, _\bv_\bi_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd,
- and _\bv_\bi_\b-_\bi_\bn_\bs_\be_\br_\bt. _\bv_\bi is equivalent to _\bv_\bi_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd; _\be_\bm_\ba_\bc_\bs is
+ _\bd_\ba_\br_\bd_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bm_\be_\bt_\ba_\b, _\be_\bm_\ba_\bc_\bs_\b-_\bc_\bt_\bl_\bx_\b, _\bv_\bi_\b, _\bv_\bi_\b-_\bm_\bo_\bv_\be_\b, _\bv_\bi_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd,
+ and _\bv_\bi_\b-_\bi_\bn_\bs_\be_\br_\bt. _\bv_\bi is equivalent to _\bv_\bi_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd; _\be_\bm_\ba_\bc_\bs is
equivalent to _\be_\bm_\ba_\bc_\bs_\b-_\bs_\bt_\ba_\bn_\bd_\ba_\br_\bd.
-\b-l\bl List the names of all r\bre\bea\bad\bdl\bli\bin\bne\be functions.
- -\b-p\bp Display r\bre\bea\bad\bdl\bli\bin\bne\be function names and bindings in such a
+ -\b-p\bp Display r\bre\bea\bad\bdl\bli\bin\bne\be function names and bindings in such a
way that they can be re-read.
-\b-P\bP List current r\bre\bea\bad\bdl\bli\bin\bne\be function names and bindings.
- -\b-s\bs Display r\bre\bea\bad\bdl\bli\bin\bne\be key sequences bound to macros and the
- strings they output in such a way that they can be re-
+ -\b-s\bs Display r\bre\bea\bad\bdl\bli\bin\bne\be key sequences bound to macros and the
+ strings they output in such a way that they can be re-
read.
- -\b-S\bS Display r\bre\bea\bad\bdl\bli\bin\bne\be key sequences bound to macros and the
+ -\b-S\bS Display r\bre\bea\bad\bdl\bli\bin\bne\be key sequences bound to macros and the
strings they output.
- -\b-v\bv Display r\bre\bea\bad\bdl\bli\bin\bne\be variable names and values in such a way
+ -\b-v\bv Display r\bre\bea\bad\bdl\bli\bin\bne\be variable names and values in such a way
that they can be re-read.
-\b-V\bV List current r\bre\bea\bad\bdl\bli\bin\bne\be variable names and values.
-\b-f\bf _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be
-\b-r\br _\bk_\be_\by_\bs_\be_\bq
Remove any current binding for _\bk_\be_\by_\bs_\be_\bq.
-\b-x\bx _\bk_\be_\by_\bs_\be_\bq:\b:_\bs_\bh_\be_\bl_\bl_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd
- Cause _\bs_\bh_\be_\bl_\bl_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd to be executed whenever _\bk_\be_\by_\bs_\be_\bq is
- entered. When _\bs_\bh_\be_\bl_\bl_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd is executed, the shell sets
- the R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE_\b_L\bLI\bIN\bNE\bE variable to the contents of the r\bre\bea\bad\bd-\b-
- l\bli\bin\bne\be line buffer and the R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE_\b_P\bPO\bOI\bIN\bNT\bT variable to the
+ Cause _\bs_\bh_\be_\bl_\bl_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd to be executed whenever _\bk_\be_\by_\bs_\be_\bq is
+ entered. When _\bs_\bh_\be_\bl_\bl_\b-_\bc_\bo_\bm_\bm_\ba_\bn_\bd is executed, the shell sets
+ the R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE_\b_L\bLI\bIN\bNE\bE variable to the contents of the r\bre\bea\bad\bd-\b-
+ l\bli\bin\bne\be line buffer and the R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE_\b_P\bPO\bOI\bIN\bNT\bT variable to the
current location of the insertion point. If the executed
- command changes the value of R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE_\b_L\bLI\bIN\bNE\bE or R\bRE\bEA\bAD\bD-\b-
- L\bLI\bIN\bNE\bE_\b_P\bPO\bOI\bIN\bNT\bT, those new values will be reflected in the
+ command changes the value of R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE_\b_L\bLI\bIN\bNE\bE or R\bRE\bEA\bAD\bD-\b-
+ L\bLI\bIN\bNE\bE_\b_P\bPO\bOI\bIN\bNT\bT, those new values will be reflected in the
editing state.
- The return value is 0 unless an unrecognized option is given or
+ The return value is 0 unless an unrecognized option is given or
an error occurred.
b\bbr\bre\bea\bak\bk [_\bn]
- Exit from within a f\bfo\bor\br, w\bwh\bhi\bil\ble\be, u\bun\bnt\bti\bil\bl, or s\bse\bel\ble\bec\bct\bt loop. If _\bn is
- specified, break _\bn levels. _\bn must be >= 1. If _\bn is greater
- than the number of enclosing loops, all enclosing loops are
- exited. The return value is 0 unless _\bn is not greater than or
+ Exit from within a f\bfo\bor\br, w\bwh\bhi\bil\ble\be, u\bun\bnt\bti\bil\bl, or s\bse\bel\ble\bec\bct\bt loop. If _\bn is
+ specified, break _\bn levels. _\bn must be >= 1. If _\bn is greater
+ than the number of enclosing loops, all enclosing loops are
+ exited. The return value is 0 unless _\bn is not greater than or
equal to 1.
b\bbu\bui\bil\blt\bti\bin\bn _\bs_\bh_\be_\bl_\bl_\b-_\bb_\bu_\bi_\bl_\bt_\bi_\bn [_\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs]
- Execute the specified shell builtin, passing it _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs, and
+ Execute the specified shell builtin, passing it _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs, and
return its exit status. This is useful when defining a function
- whose name is the same as a shell builtin, retaining the func-
+ whose name is the same as a shell builtin, retaining the func-
tionality of the builtin within the function. The c\bcd\bd builtin is
- commonly redefined this way. The return status is false if
+ commonly redefined this way. The return status is false if
_\bs_\bh_\be_\bl_\bl_\b-_\bb_\bu_\bi_\bl_\bt_\bi_\bn is not a shell builtin command.
c\bca\bal\bll\ble\ber\br [_\be_\bx_\bp_\br]
Returns the context of any active subroutine call (a shell func-
tion or a script executed with the .\b. or s\bso\bou\bur\brc\bce\be builtins). With-
out _\be_\bx_\bp_\br, c\bca\bal\bll\ble\ber\br displays the line number and source filename of
- the current subroutine call. If a non-negative integer is sup-
+ the current subroutine call. If a non-negative integer is sup-
plied as _\be_\bx_\bp_\br, c\bca\bal\bll\ble\ber\br displays the line number, subroutine name,
- and source file corresponding to that position in the current
- execution call stack. This extra information may be used, for
- example, to print a stack trace. The current frame is frame 0.
- The return value is 0 unless the shell is not executing a sub-
- routine call or _\be_\bx_\bp_\br does not correspond to a valid position in
+ and source file corresponding to that position in the current
+ execution call stack. This extra information may be used, for
+ example, to print a stack trace. The current frame is frame 0.
+ The return value is 0 unless the shell is not executing a sub-
+ routine call or _\be_\bx_\bp_\br does not correspond to a valid position in
the call stack.
c\bcd\bd [-\b-L\bL|[-\b-P\bP [-\b-e\be]]] [_\bd_\bi_\br]
- Change the current directory to _\bd_\bi_\br. The variable H\bHO\bOM\bME\bE is the
- default _\bd_\bi_\br. The variable C\bCD\bDP\bPA\bAT\bTH\bH defines the search path for
- the directory containing _\bd_\bi_\br. Alternative directory names in
- C\bCD\bDP\bPA\bAT\bTH\bH are separated by a colon (:). A null directory name in
- C\bCD\bDP\bPA\bAT\bTH\bH is the same as the current directory, i.e., ``.\b.''. If
- _\bd_\bi_\br begins with a slash (/), then C\bCD\bDP\bPA\bAT\bTH\bH is not used. The -\b-P\bP
- option says to use the physical directory structure instead of
- following symbolic links (see also the -\b-P\bP option to the s\bse\bet\bt
+ Change the current directory to _\bd_\bi_\br. The variable H\bHO\bOM\bME\bE is the
+ default _\bd_\bi_\br. The variable C\bCD\bDP\bPA\bAT\bTH\bH defines the search path for
+ the directory containing _\bd_\bi_\br. Alternative directory names in
+ C\bCD\bDP\bPA\bAT\bTH\bH are separated by a colon (:). A null directory name in
+ C\bCD\bDP\bPA\bAT\bTH\bH is the same as the current directory, i.e., ``.\b.''. If
+ _\bd_\bi_\br begins with a slash (/), then C\bCD\bDP\bPA\bAT\bTH\bH is not used. The -\b-P\bP
+ option says to use the physical directory structure instead of
+ following symbolic links (see also the -\b-P\bP option to the s\bse\bet\bt
builtin command); the -\b-L\bL option forces symbolic links to be fol-
- lowed. If the -\b-e\be option is supplied with -\b-P\bP, and the current
+ lowed. If the -\b-e\be option is supplied with -\b-P\bP, and the current
working directory cannot be successfully determined after a suc-
cessful directory change, c\bcd\bd will return an unsuccessful status.
- An argument of -\b- is equivalent to $\b$O\bOL\bLD\bDP\bPW\bWD\bD. If a non-empty
- directory name from C\bCD\bDP\bPA\bAT\bTH\bH is used, or if -\b- is the first argu-
+ An argument of -\b- is equivalent to $\b$O\bOL\bLD\bDP\bPW\bWD\bD. If a non-empty
+ directory name from C\bCD\bDP\bPA\bAT\bTH\bH is used, or if -\b- is the first argu-
ment, and the directory change is successful, the absolute path-
- name of the new working directory is written to the standard
- output. The return value is true if the directory was success-
+ name of the new working directory is written to the standard
+ output. The return value is true if the directory was success-
fully changed; false otherwise.
c\bco\bom\bmm\bma\ban\bnd\bd [-\b-p\bpV\bVv\bv] _\bc_\bo_\bm_\bm_\ba_\bn_\bd [_\ba_\br_\bg ...]
- Run _\bc_\bo_\bm_\bm_\ba_\bn_\bd with _\ba_\br_\bg_\bs suppressing the normal shell function
- lookup. Only builtin commands or commands found in the P\bPA\bAT\bTH\bH are
- executed. If the -\b-p\bp option is given, the search for _\bc_\bo_\bm_\bm_\ba_\bn_\bd is
- performed using a default value for P\bPA\bAT\bTH\bH that is guaranteed to
- find all of the standard utilities. If either the -\b-V\bV or -\b-v\bv
+ Run _\bc_\bo_\bm_\bm_\ba_\bn_\bd with _\ba_\br_\bg_\bs suppressing the normal shell function
+ lookup. Only builtin commands or commands found in the P\bPA\bAT\bTH\bH are
+ executed. If the -\b-p\bp option is given, the search for _\bc_\bo_\bm_\bm_\ba_\bn_\bd is
+ performed using a default value for P\bPA\bAT\bTH\bH that is guaranteed to
+ find all of the standard utilities. If either the -\b-V\bV or -\b-v\bv
option is supplied, a description of _\bc_\bo_\bm_\bm_\ba_\bn_\bd is printed. The -\b-v\bv
- option causes a single word indicating the command or file name
+ option causes a single word indicating the command or file name
used to invoke _\bc_\bo_\bm_\bm_\ba_\bn_\bd to be displayed; the -\b-V\bV option produces a
- more verbose description. If the -\b-V\bV or -\b-v\bv option is supplied,
- the exit status is 0 if _\bc_\bo_\bm_\bm_\ba_\bn_\bd was found, and 1 if not. If
+ more verbose description. If the -\b-V\bV or -\b-v\bv option is supplied,
+ the exit status is 0 if _\bc_\bo_\bm_\bm_\ba_\bn_\bd was found, and 1 if not. If
neither option is supplied and an error occurred or _\bc_\bo_\bm_\bm_\ba_\bn_\bd can-
- not be found, the exit status is 127. Otherwise, the exit sta-
+ not be found, the exit status is 127. Otherwise, the exit sta-
tus of the c\bco\bom\bmm\bma\ban\bnd\bd builtin is the exit status of _\bc_\bo_\bm_\bm_\ba_\bn_\bd.
c\bco\bom\bmp\bpg\bge\ben\bn [_\bo_\bp_\bt_\bi_\bo_\bn] [_\bw_\bo_\br_\bd]
- Generate possible completion matches for _\bw_\bo_\br_\bd according to the
- _\bo_\bp_\bt_\bi_\bo_\bns, which may be any option accepted by the c\bco\bom\bmp\bpl\ble\bet\bte\be
- builtin with the exception of -\b-p\bp and -\b-r\br, and write the matches
- to the standard output. When using the -\b-F\bF or -\b-C\bC options, the
- various shell variables set by the programmable completion
+ Generate possible completion matches for _\bw_\bo_\br_\bd according to the
+ _\bo_\bp_\bt_\bi_\bo_\bns, which may be any option accepted by the c\bco\bom\bmp\bpl\ble\bet\bte\be
+ builtin with the exception of -\b-p\bp and -\b-r\br, and write the matches
+ to the standard output. When using the -\b-F\bF or -\b-C\bC options, the
+ various shell variables set by the programmable completion
facilities, while available, will not have useful values.
- The matches will be generated in the same way as if the pro-
- grammable completion code had generated them directly from a
+ The matches will be generated in the same way as if the pro-
+ grammable completion code had generated them directly from a
completion specification with the same flags. If _\bw_\bo_\br_\bd is speci-
fied, only those completions matching _\bw_\bo_\br_\bd will be displayed.
- The return value is true unless an invalid option is supplied,
+ The return value is true unless an invalid option is supplied,
or no matches were generated.
- c\bco\bom\bmp\bpl\ble\bet\bte\be [-\b-a\bab\bbc\bcd\bde\bef\bfg\bgj\bjk\bks\bsu\buv\bv] [-\b-o\bo _\bc_\bo_\bm_\bp_\b-_\bo_\bp_\bt_\bi_\bo_\bn] [-\b-D\bDE\bE] [-\b-A\bA _\ba_\bc_\bt_\bi_\bo_\bn] [-\b-G\bG _\bg_\bl_\bo_\bb_\b-
+ c\bco\bom\bmp\bpl\ble\bet\bte\be [-\b-a\bab\bbc\bcd\bde\bef\bfg\bgj\bjk\bks\bsu\buv\bv] [-\b-o\bo _\bc_\bo_\bm_\bp_\b-_\bo_\bp_\bt_\bi_\bo_\bn] [-\b-D\bDE\bE] [-\b-A\bA _\ba_\bc_\bt_\bi_\bo_\bn] [-\b-G\bG _\bg_\bl_\bo_\bb_\b-
_\bp_\ba_\bt] [-\b-W\bW _\bw_\bo_\br_\bd_\bl_\bi_\bs_\bt] [-\b-F\bF _\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn] [-\b-C\bC _\bc_\bo_\bm_\bm_\ba_\bn_\bd]
[-\b-X\bX _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt] [-\b-P\bP _\bp_\br_\be_\bf_\bi_\bx] [-\b-S\bS _\bs_\bu_\bf_\bf_\bi_\bx] _\bn_\ba_\bm_\be [_\bn_\ba_\bm_\be _\b._\b._\b.]
c\bco\bom\bmp\bpl\ble\bet\bte\be -\b-p\bpr\br [-\b-D\bDE\bE] [_\bn_\ba_\bm_\be ...]
- Specify how arguments to each _\bn_\ba_\bm_\be should be completed. If the
- -\b-p\bp option is supplied, or if no options are supplied, existing
- completion specifications are printed in a way that allows them
+ Specify how arguments to each _\bn_\ba_\bm_\be should be completed. If the
+ -\b-p\bp option is supplied, or if no options are supplied, existing
+ completion specifications are printed in a way that allows them
to be reused as input. The -\b-r\br option removes a completion spec-
- ification for each _\bn_\ba_\bm_\be, or, if no _\bn_\ba_\bm_\bes are supplied, all com-
+ ification for each _\bn_\ba_\bm_\be, or, if no _\bn_\ba_\bm_\bes are supplied, all com-
pletion specifications. The -\b-D\bD option indicates that the
- remaining options and actions should apply to the ``default''
- command completion; that is, completion attempted on a command
- for which no completion has previously been defined. The -\b-E\bE
- option indicates that the remaining options and actions should
- apply to ``empty'' command completion; that is, completion
+ remaining options and actions should apply to the ``default''
+ command completion; that is, completion attempted on a command
+ for which no completion has previously been defined. The -\b-E\bE
+ option indicates that the remaining options and actions should
+ apply to ``empty'' command completion; that is, completion
attempted on a blank line.
- The process of applying these completion specifications when
- word completion is attempted is described above under P\bPr\bro\bo-\b-
+ The process of applying these completion specifications when
+ word completion is attempted is described above under P\bPr\bro\bo-\b-
g\bgr\bra\bam\bmm\bma\bab\bbl\ble\be C\bCo\bom\bmp\bpl\ble\bet\bti\bio\bon\bn.
- Other options, if specified, have the following meanings. The
- arguments to the -\b-G\bG, -\b-W\bW, and -\b-X\bX options (and, if necessary, the
- -\b-P\bP and -\b-S\bS options) should be quoted to protect them from expan-
+ Other options, if specified, have the following meanings. The
+ arguments to the -\b-G\bG, -\b-W\bW, and -\b-X\bX options (and, if necessary, the
+ -\b-P\bP and -\b-S\bS options) should be quoted to protect them from expan-
sion before the c\bco\bom\bmp\bpl\ble\bet\bte\be builtin is invoked.
-\b-o\bo _\bc_\bo_\bm_\bp_\b-_\bo_\bp_\bt_\bi_\bo_\bn
- The _\bc_\bo_\bm_\bp_\b-_\bo_\bp_\bt_\bi_\bo_\bn controls several aspects of the comp-
- spec's behavior beyond the simple generation of comple-
+ The _\bc_\bo_\bm_\bp_\b-_\bo_\bp_\bt_\bi_\bo_\bn controls several aspects of the comp-
+ spec's behavior beyond the simple generation of comple-
tions. _\bc_\bo_\bm_\bp_\b-_\bo_\bp_\bt_\bi_\bo_\bn may be one of:
b\bba\bas\bsh\bhd\bde\bef\bfa\bau\bul\blt\bt
Perform the rest of the default b\bba\bas\bsh\bh completions
if the compspec generates no matches.
- d\bde\bef\bfa\bau\bul\blt\bt Use readline's default filename completion if
+ d\bde\bef\bfa\bau\bul\blt\bt Use readline's default filename completion if
the compspec generates no matches.
d\bdi\bir\brn\bna\bam\bme\bes\bs
- Perform directory name completion if the comp-
+ Perform directory name completion if the comp-
spec generates no matches.
f\bfi\bil\ble\ben\bna\bam\bme\bes\bs
- Tell readline that the compspec generates file-
- names, so it can perform any filename-specific
- processing (like adding a slash to directory
- names, quoting special characters, or suppress-
- ing trailing spaces). Intended to be used with
+ Tell readline that the compspec generates file-
+ names, so it can perform any filename-specific
+ processing (like adding a slash to directory
+ names, quoting special characters, or suppress-
+ ing trailing spaces). Intended to be used with
shell functions.
- n\bno\bos\bsp\bpa\bac\bce\be Tell readline not to append a space (the
- default) to words completed at the end of the
+ n\bno\bos\bsp\bpa\bac\bce\be Tell readline not to append a space (the
+ default) to words completed at the end of the
line.
p\bpl\blu\bus\bsd\bdi\bir\brs\bs
- After any matches defined by the compspec are
- generated, directory name completion is
- attempted and any matches are added to the
+ After any matches defined by the compspec are
+ generated, directory name completion is
+ attempted and any matches are added to the
results of the other actions.
-\b-A\bA _\ba_\bc_\bt_\bi_\bo_\bn
- The _\ba_\bc_\bt_\bi_\bo_\bn may be one of the following to generate a
+ The _\ba_\bc_\bt_\bi_\bo_\bn may be one of the following to generate a
list of possible completions:
a\bal\bli\bia\bas\bs Alias names. May also be specified as -\b-a\ba.
a\bar\brr\bra\bay\byv\bva\bar\br
Array variable names.
b\bbi\bin\bnd\bdi\bin\bng\bg R\bRe\bea\bad\bdl\bli\bin\bne\be key binding names.
- b\bbu\bui\bil\blt\bti\bin\bn Names of shell builtin commands. May also be
+ b\bbu\bui\bil\blt\bti\bin\bn Names of shell builtin commands. May also be
specified as -\b-b\bb.
c\bco\bom\bmm\bma\ban\bnd\bd Command names. May also be specified as -\b-c\bc.
d\bdi\bir\bre\bec\bct\bto\bor\bry\by
d\bdi\bis\bsa\bab\bbl\ble\bed\bd
Names of disabled shell builtins.
e\ben\bna\bab\bbl\ble\bed\bd Names of enabled shell builtins.
- e\bex\bxp\bpo\bor\brt\bt Names of exported shell variables. May also be
+ e\bex\bxp\bpo\bor\brt\bt Names of exported shell variables. May also be
specified as -\b-e\be.
f\bfi\bil\ble\be File names. May also be specified as -\b-f\bf.
f\bfu\bun\bnc\bct\bti\bio\bon\bn
h\bhe\bel\blp\bpt\bto\bop\bpi\bic\bc
Help topics as accepted by the h\bhe\bel\blp\bp builtin.
h\bho\bos\bst\btn\bna\bam\bme\be
- Hostnames, as taken from the file specified by
+ Hostnames, as taken from the file specified by
the H\bHO\bOS\bST\bTF\bFI\bIL\bLE\bE shell variable.
- j\bjo\bob\bb Job names, if job control is active. May also
+ j\bjo\bob\bb Job names, if job control is active. May also
be specified as -\b-j\bj.
- k\bke\bey\byw\bwo\bor\brd\bd Shell reserved words. May also be specified as
+ k\bke\bey\byw\bwo\bor\brd\bd Shell reserved words. May also be specified as
-\b-k\bk.
r\bru\bun\bnn\bni\bin\bng\bg Names of running jobs, if job control is active.
s\bse\ber\brv\bvi\bic\bce\be Service names. May also be specified as -\b-s\bs.
- s\bse\bet\bto\bop\bpt\bt Valid arguments for the -\b-o\bo option to the s\bse\bet\bt
+ s\bse\bet\bto\bop\bpt\bt Valid arguments for the -\b-o\bo option to the s\bse\bet\bt
builtin.
- s\bsh\bho\bop\bpt\bt Shell option names as accepted by the s\bsh\bho\bop\bpt\bt
+ s\bsh\bho\bop\bpt\bt Shell option names as accepted by the s\bsh\bho\bop\bpt\bt
builtin.
s\bsi\big\bgn\bna\bal\bl Signal names.
s\bst\bto\bop\bpp\bpe\bed\bd Names of stopped jobs, if job control is active.
Names of all shell variables. May also be spec-
ified as -\b-v\bv.
-\b-C\bC _\bc_\bo_\bm_\bm_\ba_\bn_\bd
- _\bc_\bo_\bm_\bm_\ba_\bn_\bd is executed in a subshell environment, and its
+ _\bc_\bo_\bm_\bm_\ba_\bn_\bd is executed in a subshell environment, and its
output is used as the possible completions.
-\b-F\bF _\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn
- The shell function _\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn is executed in the current
- shell environment. When it finishes, the possible com-
- pletions are retrieved from the value of the C\bCO\bOM\bMP\bPR\bRE\bEP\bPL\bLY\bY
+ The shell function _\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn is executed in the current
+ shell environment. When it finishes, the possible com-
+ pletions are retrieved from the value of the C\bCO\bOM\bMP\bPR\bRE\bEP\bPL\bLY\bY
array variable.
-\b-G\bG _\bg_\bl_\bo_\bb_\bp_\ba_\bt
- The pathname expansion pattern _\bg_\bl_\bo_\bb_\bp_\ba_\bt is expanded to
+ The pathname expansion pattern _\bg_\bl_\bo_\bb_\bp_\ba_\bt is expanded to
generate the possible completions.
-\b-P\bP _\bp_\br_\be_\bf_\bi_\bx
- _\bp_\br_\be_\bf_\bi_\bx is added at the beginning of each possible com-
+ _\bp_\br_\be_\bf_\bi_\bx is added at the beginning of each possible com-
pletion after all other options have been applied.
-\b-S\bS _\bs_\bu_\bf_\bf_\bi_\bx
_\bs_\bu_\bf_\bf_\bi_\bx is appended to each possible completion after all
other options have been applied.
-\b-W\bW _\bw_\bo_\br_\bd_\bl_\bi_\bs_\bt
- The _\bw_\bo_\br_\bd_\bl_\bi_\bs_\bt is split using the characters in the I\bIF\bFS\bS
- special variable as delimiters, and each resultant word
- is expanded. The possible completions are the members
- of the resultant list which match the word being com-
+ The _\bw_\bo_\br_\bd_\bl_\bi_\bs_\bt is split using the characters in the I\bIF\bFS\bS
+ special variable as delimiters, and each resultant word
+ is expanded. The possible completions are the members
+ of the resultant list which match the word being com-
pleted.
-\b-X\bX _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt
- _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt is a pattern as used for pathname expansion.
+ _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt is a pattern as used for pathname expansion.
It is applied to the list of possible completions gener-
- ated by the preceding options and arguments, and each
- completion matching _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt is removed from the list.
- A leading !\b! in _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt negates the pattern; in this
- case, any completion not matching _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt is removed.
-
- The return value is true unless an invalid option is supplied,
- an option other than -\b-p\bp or -\b-r\br is supplied without a _\bn_\ba_\bm_\be argu-
- ment, an attempt is made to remove a completion specification
+ ated by the preceding options and arguments, and each
+ completion matching _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt is removed from the list.
+ A leading !\b! in _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt negates the pattern; in this
+ case, any completion not matching _\bf_\bi_\bl_\bt_\be_\br_\bp_\ba_\bt is removed.
+
+ The return value is true unless an invalid option is supplied,
+ an option other than -\b-p\bp or -\b-r\br is supplied without a _\bn_\ba_\bm_\be argu-
+ ment, an attempt is made to remove a completion specification
for a _\bn_\ba_\bm_\be for which no specification exists, or an error occurs
adding a completion specification.
c\bco\bom\bmp\bpo\bop\bpt\bt [-\b-o\bo _\bo_\bp_\bt_\bi_\bo_\bn] [-\b-D\bDE\bE] [+\b+o\bo _\bo_\bp_\bt_\bi_\bo_\bn] [_\bn_\ba_\bm_\be]
Modify completion options for each _\bn_\ba_\bm_\be according to the
- _\bo_\bp_\bt_\bi_\bo_\bns, or for the currently-executing completion if no _\bn_\ba_\bm_\bes
- are supplied. If no _\bo_\bp_\bt_\bi_\bo_\bns are given, display the completion
- options for each _\bn_\ba_\bm_\be or the current completion. The possible
- values of _\bo_\bp_\bt_\bi_\bo_\bn are those valid for the c\bco\bom\bmp\bpl\ble\bet\bte\be builtin
- described above. The -\b-D\bD option indicates that the remaining
+ _\bo_\bp_\bt_\bi_\bo_\bns, or for the currently-executing completion if no _\bn_\ba_\bm_\bes
+ are supplied. If no _\bo_\bp_\bt_\bi_\bo_\bns are given, display the completion
+ options for each _\bn_\ba_\bm_\be or the current completion. The possible
+ values of _\bo_\bp_\bt_\bi_\bo_\bn are those valid for the c\bco\bom\bmp\bpl\ble\bet\bte\be builtin
+ described above. The -\b-D\bD option indicates that the remaining
options should apply to the ``default'' command completion; that
- is, completion attempted on a command for which no completion
- has previously been defined. The -\b-E\bE option indicates that the
- remaining options should apply to ``empty'' command completion;
+ is, completion attempted on a command for which no completion
+ has previously been defined. The -\b-E\bE option indicates that the
+ remaining options should apply to ``empty'' command completion;
that is, completion attempted on a blank line.
- The return value is true unless an invalid option is supplied,
+ The return value is true unless an invalid option is supplied,
an attempt is made to modify the options for a _\bn_\ba_\bm_\be for which no
completion specification exists, or an output error occurs.
c\bco\bon\bnt\bti\bin\bnu\bue\be [_\bn]
Resume the next iteration of the enclosing f\bfo\bor\br, w\bwh\bhi\bil\ble\be, u\bun\bnt\bti\bil\bl, or
- s\bse\bel\ble\bec\bct\bt loop. If _\bn is specified, resume at the _\bnth enclosing
- loop. _\bn must be >= 1. If _\bn is greater than the number of
- enclosing loops, the last enclosing loop (the ``top-level''
+ s\bse\bel\ble\bec\bct\bt loop. If _\bn is specified, resume at the _\bnth enclosing
+ loop. _\bn must be >= 1. If _\bn is greater than the number of
+ enclosing loops, the last enclosing loop (the ``top-level''
loop) is resumed. The return value is 0 unless _\bn is not greater
than or equal to 1.
d\bde\bec\bcl\bla\bar\bre\be [-\b-a\baA\bAf\bfF\bFg\bgi\bil\blr\brt\btu\bux\bx] [-\b-p\bp] [_\bn_\ba_\bm_\be[=_\bv_\ba_\bl_\bu_\be] ...]
t\bty\byp\bpe\bes\bse\bet\bt [-\b-a\baA\bAf\bfF\bFg\bgi\bil\blr\brt\btu\bux\bx] [-\b-p\bp] [_\bn_\ba_\bm_\be[=_\bv_\ba_\bl_\bu_\be] ...]
- Declare variables and/or give them attributes. If no _\bn_\ba_\bm_\bes are
- given then display the values of variables. The -\b-p\bp option will
+ Declare variables and/or give them attributes. If no _\bn_\ba_\bm_\bes are
+ given then display the values of variables. The -\b-p\bp option will
display the attributes and values of each _\bn_\ba_\bm_\be. When -\b-p\bp is used
with _\bn_\ba_\bm_\be arguments, additional options are ignored. When -\b-p\bp is
- supplied without _\bn_\ba_\bm_\be arguments, it will display the attributes
- and values of all variables having the attributes specified by
- the additional options. If no other options are supplied with
- -\b-p\bp, d\bde\bec\bcl\bla\bar\bre\be will display the attributes and values of all shell
- variables. The -\b-f\bf option will restrict the display to shell
+ supplied without _\bn_\ba_\bm_\be arguments, it will display the attributes
+ and values of all variables having the attributes specified by
+ the additional options. If no other options are supplied with
+ -\b-p\bp, d\bde\bec\bcl\bla\bar\bre\be will display the attributes and values of all shell
+ variables. The -\b-f\bf option will restrict the display to shell
functions. The -\b-F\bF option inhibits the display of function defi-
- nitions; only the function name and attributes are printed. If
- the e\bex\bxt\btd\bde\beb\bbu\bug\bg shell option is enabled using s\bsh\bho\bop\bpt\bt, the source
+ nitions; only the function name and attributes are printed. If
+ the e\bex\bxt\btd\bde\beb\bbu\bug\bg shell option is enabled using s\bsh\bho\bop\bpt\bt, the source
file name and line number where the function is defined are dis-
played as well. The -\b-F\bF option implies -\b-f\bf. The -\b-g\bg option forces
- variables to be created or modified at the global scope, even
- when d\bde\bec\bcl\bla\bar\bre\be is executed in a shell function. It is ignored in
- all other cases. The following options can be used to restrict
- output to variables with the specified attribute or to give
+ variables to be created or modified at the global scope, even
+ when d\bde\bec\bcl\bla\bar\bre\be is executed in a shell function. It is ignored in
+ all other cases. The following options can be used to restrict
+ output to variables with the specified attribute or to give
variables attributes:
- -\b-a\ba Each _\bn_\ba_\bm_\be is an indexed array variable (see A\bAr\brr\bra\bay\bys\bs
+ -\b-a\ba Each _\bn_\ba_\bm_\be is an indexed array variable (see A\bAr\brr\bra\bay\bys\bs
above).
- -\b-A\bA Each _\bn_\ba_\bm_\be is an associative array variable (see A\bAr\brr\bra\bay\bys\bs
+ -\b-A\bA Each _\bn_\ba_\bm_\be is an associative array variable (see A\bAr\brr\bra\bay\bys\bs
above).
-\b-f\bf Use function names only.
-\b-i\bi The variable is treated as an integer; arithmetic evalua-
- tion (see A\bAR\bRI\bIT\bTH\bHM\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN above) is performed when
+ tion (see A\bAR\bRI\bIT\bTH\bHM\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN above) is performed when
the variable is assigned a value.
- -\b-l\bl When the variable is assigned a value, all upper-case
- characters are converted to lower-case. The upper-case
+ -\b-l\bl When the variable is assigned a value, all upper-case
+ characters are converted to lower-case. The upper-case
attribute is disabled.
-\b-r\br Make _\bn_\ba_\bm_\bes readonly. These names cannot then be assigned
values by subsequent assignment statements or unset.
- -\b-t\bt Give each _\bn_\ba_\bm_\be the _\bt_\br_\ba_\bc_\be attribute. Traced functions
- inherit the D\bDE\bEB\bBU\bUG\bG and R\bRE\bET\bTU\bUR\bRN\bN traps from the calling
- shell. The trace attribute has no special meaning for
+ -\b-t\bt Give each _\bn_\ba_\bm_\be the _\bt_\br_\ba_\bc_\be attribute. Traced functions
+ inherit the D\bDE\bEB\bBU\bUG\bG and R\bRE\bET\bTU\bUR\bRN\bN traps from the calling
+ shell. The trace attribute has no special meaning for
variables.
- -\b-u\bu When the variable is assigned a value, all lower-case
- characters are converted to upper-case. The lower-case
+ -\b-u\bu When the variable is assigned a value, all lower-case
+ characters are converted to upper-case. The lower-case
attribute is disabled.
- -\b-x\bx Mark _\bn_\ba_\bm_\bes for export to subsequent commands via the
+ -\b-x\bx Mark _\bn_\ba_\bm_\bes for export to subsequent commands via the
environment.
- Using `+' instead of `-' turns off the attribute instead, with
+ Using `+' instead of `-' turns off the attribute instead, with
the exceptions that +\b+a\ba may not be used to destroy an array vari-
- able and +\b+r\br will not remove the readonly attribute. When used
+ able and +\b+r\br will not remove the readonly attribute. When used
in a function, makes each _\bn_\ba_\bm_\be local, as with the l\blo\boc\bca\bal\bl command,
- unless the -\b-g\bgP\bP o\bop\bpt\bti\bio\bon\bn i\bis\bs s\bsu\bup\bpp\bpl\bli\bie\bed\bd,\b, I\bIf\bf a\ba v\bva\bar\bri\bia\bab\bbl\ble\be n\bna\bam\bme\be i\bis\bs f\bfo\bol\bl-\b-
+ unless the -\b-g\bgP\bP o\bop\bpt\bti\bio\bon\bn i\bis\bs s\bsu\bup\bpp\bpl\bli\bie\bed\bd,\b, I\bIf\bf a\ba v\bva\bar\bri\bia\bab\bbl\ble\be n\bna\bam\bme\be i\bis\bs f\bfo\bol\bl-\b-
l\blo\bow\bwe\bed\bd b\bby\by =\b=_\bv_\ba_\bl_\bu_\be,\b, t\bth\bhe\be v\bva\bal\blu\bue\be o\bof\bf t\bth\bhe\be v\bva\bar\bri\bia\bab\bbl\ble\be i\bis\bs s\bse\bet\bt t\bto\bo _\bv_\ba_\bl_\bu_\be.\b. T\bTh\bhe\be
- r\bre\bet\btu\bur\brn\bn v\bva\bal\blu\bue\be i\bis\bs 0\b0 u\bun\bnl\ble\bes\bss\bs a\ban\bn i\bin\bnv\bva\bal\bli\bid\bd o\bop\bpt\bti\bio\bon\bn i\bis\bs e\ben\bnc\bco\bou\bun\bnt\bte\ber\bre\bed\bd,\b, a\ban\bn
- a\bat\btt\bte\bem\bmp\bpt\bt i\bis\bs m\bma\bad\bde\be t\bto\bo d\bde\bef\bfi\bin\bne\be a\ba f\bfu\bun\bnc\bct\bti\bio\bon\bn u\bus\bsi\bin\bng\bg `\b``\b`-\b-f\bf f\bfo\boo\bo=\b=b\bba\bar\br'\b''\b',\b, a\ban\bn
- a\bat\btt\bte\bem\bmp\bpt\bt i\bis\bs m\bma\bad\bde\be t\bto\bo a\bas\bss\bsi\big\bgn\bn a\ba v\bva\bal\blu\bue\be t\bto\bo a\ba r\bre\bea\bad\bdo\bon\bnl\bly\by v\bva\bar\bri\bia\bab\bbl\ble\be,\b, a\ban\bn
- a\bat\btt\bte\bem\bmp\bpt\bt i\bis\bs m\bma\bad\bde\be t\bto\bo a\bas\bss\bsi\big\bgn\bn a\ba v\bva\bal\blu\bue\be t\bto\bo a\ban\bn a\bar\brr\bra\bay\by v\bva\bar\bri\bia\bab\bbl\ble\be w\bwi\bit\bth\bho\bou\but\bt
- u\bus\bsi\bin\bng\bg t\bth\bhe\be c\bco\bom\bmp\bpo\bou\bun\bnd\bd a\bas\bss\bsi\big\bgn\bnm\bme\ben\bnt\bt s\bsy\byn\bnt\bta\bax\bx (\b(s\bse\bee\be A\bAr\brr\bra\bay\bys\bs above), one of
+ r\bre\bet\btu\bur\brn\bn v\bva\bal\blu\bue\be i\bis\bs 0\b0 u\bun\bnl\ble\bes\bss\bs a\ban\bn i\bin\bnv\bva\bal\bli\bid\bd o\bop\bpt\bti\bio\bon\bn i\bis\bs e\ben\bnc\bco\bou\bun\bnt\bte\ber\bre\bed\bd,\b, a\ban\bn
+ a\bat\btt\bte\bem\bmp\bpt\bt i\bis\bs m\bma\bad\bde\be t\bto\bo d\bde\bef\bfi\bin\bne\be a\ba f\bfu\bun\bnc\bct\bti\bio\bon\bn u\bus\bsi\bin\bng\bg `\b``\b`-\b-f\bf f\bfo\boo\bo=\b=b\bba\bar\br'\b''\b',\b, a\ban\bn
+ a\bat\btt\bte\bem\bmp\bpt\bt i\bis\bs m\bma\bad\bde\be t\bto\bo a\bas\bss\bsi\big\bgn\bn a\ba v\bva\bal\blu\bue\be t\bto\bo a\ba r\bre\bea\bad\bdo\bon\bnl\bly\by v\bva\bar\bri\bia\bab\bbl\ble\be,\b, a\ban\bn
+ a\bat\btt\bte\bem\bmp\bpt\bt i\bis\bs m\bma\bad\bde\be t\bto\bo a\bas\bss\bsi\big\bgn\bn a\ba v\bva\bal\blu\bue\be t\bto\bo a\ban\bn a\bar\brr\bra\bay\by v\bva\bar\bri\bia\bab\bbl\ble\be w\bwi\bit\bth\bho\bou\but\bt
+ u\bus\bsi\bin\bng\bg t\bth\bhe\be c\bco\bom\bmp\bpo\bou\bun\bnd\bd a\bas\bss\bsi\big\bgn\bnm\bme\ben\bnt\bt s\bsy\byn\bnt\bta\bax\bx (\b(s\bse\bee\be A\bAr\brr\bra\bay\bys\bs above), one of
the _\bn_\ba_\bm_\be_\bs is not a valid shell variable name, an attempt is made
- to turn off readonly status for a readonly variable, an attempt
- is made to turn off array status for an array variable, or an
+ to turn off readonly status for a readonly variable, an attempt
+ is made to turn off array status for an array variable, or an
attempt is made to display a non-existent function with -\b-f\bf.
d\bdi\bir\brs\bs [\b[+\b+_\bn]\b] [\b[-\b-_\bn]\b] [\b[-\b-c\bcl\blp\bpv\bv]\b]
- Without options, displays the list of currently remembered
- directories. The default display is on a single line with
- directory names separated by spaces. Directories are added to
- the list with the p\bpu\bus\bsh\bhd\bd command; the p\bpo\bop\bpd\bd command removes
+ Without options, displays the list of currently remembered
+ directories. The default display is on a single line with
+ directory names separated by spaces. Directories are added to
+ the list with the p\bpu\bus\bsh\bhd\bd command; the p\bpo\bop\bpd\bd command removes
entries from the list.
+\b+_\bn Displays the _\bnth entry counting from the left of the list
shown by d\bdi\bir\brs\bs when invoked without options, starting with
zero.
- -\b-_\bn Displays the _\bnth entry counting from the right of the
+ -\b-_\bn Displays the _\bnth entry counting from the right of the
list shown by d\bdi\bir\brs\bs when invoked without options, starting
with zero.
-\b-c\bc Clears the directory stack by deleting all of the
entries.
- -\b-l\bl Produces a longer listing; the default listing format
+ -\b-l\bl Produces a longer listing; the default listing format
uses a tilde to denote the home directory.
-\b-p\bp Print the directory stack with one entry per line.
- -\b-v\bv Print the directory stack with one entry per line, pre-
+ -\b-v\bv Print the directory stack with one entry per line, pre-
fixing each entry with its index in the stack.
- The return value is 0 unless an invalid option is supplied or _\bn
+ The return value is 0 unless an invalid option is supplied or _\bn
indexes beyond the end of the directory stack.
d\bdi\bis\bso\bow\bwn\bn [-\b-a\bar\br] [-\b-h\bh] [_\bj_\bo_\bb_\bs_\bp_\be_\bc ...]
- Without options, each _\bj_\bo_\bb_\bs_\bp_\be_\bc is removed from the table of
- active jobs. If _\bj_\bo_\bb_\bs_\bp_\be_\bc is not present, and neither -\b-a\ba nor -\b-r\br
- is supplied, the shell's notion of the _\bc_\bu_\br_\br_\be_\bn_\bt _\bj_\bo_\bb is used. If
+ Without options, each _\bj_\bo_\bb_\bs_\bp_\be_\bc is removed from the table of
+ active jobs. If _\bj_\bo_\bb_\bs_\bp_\be_\bc is not present, and neither -\b-a\ba nor -\b-r\br
+ is supplied, the shell's notion of the _\bc_\bu_\br_\br_\be_\bn_\bt _\bj_\bo_\bb is used. If
the -\b-h\bh option is given, each _\bj_\bo_\bb_\bs_\bp_\be_\bc is not removed from the ta-
- ble, but is marked so that S\bSI\bIG\bGH\bHU\bUP\bP is not sent to the job if the
- shell receives a S\bSI\bIG\bGH\bHU\bUP\bP. If no _\bj_\bo_\bb_\bs_\bp_\be_\bc is present, and neither
- the -\b-a\ba nor the -\b-r\br option is supplied, the _\bc_\bu_\br_\br_\be_\bn_\bt _\bj_\bo_\bb is used.
+ ble, but is marked so that S\bSI\bIG\bGH\bHU\bUP\bP is not sent to the job if the
+ shell receives a S\bSI\bIG\bGH\bHU\bUP\bP. If no _\bj_\bo_\bb_\bs_\bp_\be_\bc is present, and neither
+ the -\b-a\ba nor the -\b-r\br option is supplied, the _\bc_\bu_\br_\br_\be_\bn_\bt _\bj_\bo_\bb is used.
If no _\bj_\bo_\bb_\bs_\bp_\be_\bc is supplied, the -\b-a\ba option means to remove or mark
- all jobs; the -\b-r\br option without a _\bj_\bo_\bb_\bs_\bp_\be_\bc argument restricts
- operation to running jobs. The return value is 0 unless a _\bj_\bo_\bb_\b-
+ all jobs; the -\b-r\br option without a _\bj_\bo_\bb_\bs_\bp_\be_\bc argument restricts
+ operation to running jobs. The return value is 0 unless a _\bj_\bo_\bb_\b-
_\bs_\bp_\be_\bc does not specify a valid job.
e\bec\bch\bho\bo [-\b-n\bne\beE\bE] [_\ba_\br_\bg ...]
- Output the _\ba_\br_\bgs, separated by spaces, followed by a newline.
+ Output the _\ba_\br_\bgs, separated by spaces, followed by a newline.
The return status is always 0. If -\b-n\bn is specified, the trailing
- newline is suppressed. If the -\b-e\be option is given, interpreta-
- tion of the following backslash-escaped characters is enabled.
- The -\b-E\bE option disables the interpretation of these escape char-
- acters, even on systems where they are interpreted by default.
- The x\bxp\bpg\bg_\b_e\bec\bch\bho\bo shell option may be used to dynamically determine
- whether or not e\bec\bch\bho\bo expands these escape characters by default.
- e\bec\bch\bho\bo does not interpret -\b--\b- to mean the end of options. e\bec\bch\bho\bo
+ newline is suppressed. If the -\b-e\be option is given, interpreta-
+ tion of the following backslash-escaped characters is enabled.
+ The -\b-E\bE option disables the interpretation of these escape char-
+ acters, even on systems where they are interpreted by default.
+ The x\bxp\bpg\bg_\b_e\bec\bch\bho\bo shell option may be used to dynamically determine
+ whether or not e\bec\bch\bho\bo expands these escape characters by default.
+ e\bec\bch\bho\bo does not interpret -\b--\b- to mean the end of options. e\bec\bch\bho\bo
interprets the following escape sequences:
\\b\a\ba alert (bell)
\\b\b\bb backspace
\\b\t\bt horizontal tab
\\b\v\bv vertical tab
\\b\\\b\ backslash
- \\b\0\b0_\bn_\bn_\bn the eight-bit character whose value is the octal value
+ \\b\0\b0_\bn_\bn_\bn the eight-bit character whose value is the octal value
_\bn_\bn_\bn (zero to three octal digits)
- \\b\x\bx_\bH_\bH the eight-bit character whose value is the hexadecimal
+ \\b\x\bx_\bH_\bH the eight-bit character whose value is the hexadecimal
value _\bH_\bH (one or two hex digits)
- \\b\u\bu_\bH_\bH_\bH_\bH the Unicode (ISO/IEC 10646) character whose value is the
+ \\b\u\bu_\bH_\bH_\bH_\bH the Unicode (ISO/IEC 10646) character whose value is the
hexadecimal value _\bH_\bH_\bH_\bH (one to four hex digits)
\\b\U\bU_\bH_\bH_\bH_\bH_\bH_\bH_\bH_\bH
- the Unicode (ISO/IEC 10646) character whose value is the
+ the Unicode (ISO/IEC 10646) character whose value is the
hexadecimal value _\bH_\bH_\bH_\bH_\bH_\bH_\bH_\bH (one to eight hex digits)
e\ben\bna\bab\bbl\ble\be [-\b-a\ba] [-\b-d\bdn\bnp\bps\bs] [-\b-f\bf _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be] [_\bn_\ba_\bm_\be ...]
- Enable and disable builtin shell commands. Disabling a builtin
+ Enable and disable builtin shell commands. Disabling a builtin
allows a disk command which has the same name as a shell builtin
- to be executed without specifying a full pathname, even though
- the shell normally searches for builtins before disk commands.
- If -\b-n\bn is used, each _\bn_\ba_\bm_\be is disabled; otherwise, _\bn_\ba_\bm_\be_\bs are
+ to be executed without specifying a full pathname, even though
+ the shell normally searches for builtins before disk commands.
+ If -\b-n\bn is used, each _\bn_\ba_\bm_\be is disabled; otherwise, _\bn_\ba_\bm_\be_\bs are
enabled. For example, to use the t\bte\bes\bst\bt binary found via the P\bPA\bAT\bTH\bH
- instead of the shell builtin version, run ``enable -n test''.
- The -\b-f\bf option means to load the new builtin command _\bn_\ba_\bm_\be from
+ instead of the shell builtin version, run ``enable -n test''.
+ The -\b-f\bf option means to load the new builtin command _\bn_\ba_\bm_\be from
shared object _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be, on systems that support dynamic loading.
- The -\b-d\bd option will delete a builtin previously loaded with -\b-f\bf.
+ The -\b-d\bd option will delete a builtin previously loaded with -\b-f\bf.
If no _\bn_\ba_\bm_\be arguments are given, or if the -\b-p\bp option is supplied,
a list of shell builtins is printed. With no other option argu-
- ments, the list consists of all enabled shell builtins. If -\b-n\bn
- is supplied, only disabled builtins are printed. If -\b-a\ba is sup-
- plied, the list printed includes all builtins, with an indica-
- tion of whether or not each is enabled. If -\b-s\bs is supplied, the
- output is restricted to the POSIX _\bs_\bp_\be_\bc_\bi_\ba_\bl builtins. The return
- value is 0 unless a _\bn_\ba_\bm_\be is not a shell builtin or there is an
+ ments, the list consists of all enabled shell builtins. If -\b-n\bn
+ is supplied, only disabled builtins are printed. If -\b-a\ba is sup-
+ plied, the list printed includes all builtins, with an indica-
+ tion of whether or not each is enabled. If -\b-s\bs is supplied, the
+ output is restricted to the POSIX _\bs_\bp_\be_\bc_\bi_\ba_\bl builtins. The return
+ value is 0 unless a _\bn_\ba_\bm_\be is not a shell builtin or there is an
error loading a new builtin from a shared object.
e\bev\bva\bal\bl [_\ba_\br_\bg ...]
- The _\ba_\br_\bgs are read and concatenated together into a single com-
- mand. This command is then read and executed by the shell, and
- its exit status is returned as the value of e\bev\bva\bal\bl. If there are
+ The _\ba_\br_\bgs are read and concatenated together into a single com-
+ mand. This command is then read and executed by the shell, and
+ its exit status is returned as the value of e\bev\bva\bal\bl. If there are
no _\ba_\br_\bg_\bs, or only null arguments, e\bev\bva\bal\bl returns 0.
e\bex\bxe\bec\bc [-\b-c\bcl\bl] [-\b-a\ba _\bn_\ba_\bm_\be] [_\bc_\bo_\bm_\bm_\ba_\bn_\bd [_\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs]]
- If _\bc_\bo_\bm_\bm_\ba_\bn_\bd is specified, it replaces the shell. No new process
- is created. The _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs become the arguments to _\bc_\bo_\bm_\bm_\ba_\bn_\bd. If
+ If _\bc_\bo_\bm_\bm_\ba_\bn_\bd is specified, it replaces the shell. No new process
+ is created. The _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs become the arguments to _\bc_\bo_\bm_\bm_\ba_\bn_\bd. If
the -\b-l\bl option is supplied, the shell places a dash at the begin-
- ning of the zeroth argument passed to _\bc_\bo_\bm_\bm_\ba_\bn_\bd. This is what
+ ning of the zeroth argument passed to _\bc_\bo_\bm_\bm_\ba_\bn_\bd. This is what
_\bl_\bo_\bg_\bi_\bn(1) does. The -\b-c\bc option causes _\bc_\bo_\bm_\bm_\ba_\bn_\bd to be executed with
- an empty environment. If -\b-a\ba is supplied, the shell passes _\bn_\ba_\bm_\be
+ an empty environment. If -\b-a\ba is supplied, the shell passes _\bn_\ba_\bm_\be
as the zeroth argument to the executed command. If _\bc_\bo_\bm_\bm_\ba_\bn_\bd can-
- not be executed for some reason, a non-interactive shell exits,
- unless the shell option e\bex\bxe\bec\bcf\bfa\bai\bil\bl is enabled, in which case it
- returns failure. An interactive shell returns failure if the
+ not be executed for some reason, a non-interactive shell exits,
+ unless the shell option e\bex\bxe\bec\bcf\bfa\bai\bil\bl is enabled, in which case it
+ returns failure. An interactive shell returns failure if the
file cannot be executed. If _\bc_\bo_\bm_\bm_\ba_\bn_\bd is not specified, any redi-
rections take effect in the current shell, and the return status
- is 0. If there is a redirection error, the return status is 1.
+ is 0. If there is a redirection error, the return status is 1.
e\bex\bxi\bit\bt [_\bn]
- Cause the shell to exit with a status of _\bn. If _\bn is omitted,
+ Cause the shell to exit with a status of _\bn. If _\bn is omitted,
the exit status is that of the last command executed. A trap on
E\bEX\bXI\bIT\bT is executed before the shell terminates.
e\bex\bxp\bpo\bor\brt\bt [-\b-f\bfn\bn] [_\bn_\ba_\bm_\be[=_\bw_\bo_\br_\bd]] ...
e\bex\bxp\bpo\bor\brt\bt -\b-p\bp
- The supplied _\bn_\ba_\bm_\be_\bs are marked for automatic export to the envi-
- ronment of subsequently executed commands. If the -\b-f\bf option is
- given, the _\bn_\ba_\bm_\be_\bs refer to functions. If no _\bn_\ba_\bm_\be_\bs are given, or
- if the -\b-p\bp option is supplied, a list of all names that are
- exported in this shell is printed. The -\b-n\bn option causes the
- export property to be removed from each _\bn_\ba_\bm_\be. If a variable
- name is followed by =_\bw_\bo_\br_\bd, the value of the variable is set to
- _\bw_\bo_\br_\bd. e\bex\bxp\bpo\bor\brt\bt returns an exit status of 0 unless an invalid
- option is encountered, one of the _\bn_\ba_\bm_\be_\bs is not a valid shell
+ The supplied _\bn_\ba_\bm_\be_\bs are marked for automatic export to the envi-
+ ronment of subsequently executed commands. If the -\b-f\bf option is
+ given, the _\bn_\ba_\bm_\be_\bs refer to functions. If no _\bn_\ba_\bm_\be_\bs are given, or
+ if the -\b-p\bp option is supplied, a list of all names that are
+ exported in this shell is printed. The -\b-n\bn option causes the
+ export property to be removed from each _\bn_\ba_\bm_\be. If a variable
+ name is followed by =_\bw_\bo_\br_\bd, the value of the variable is set to
+ _\bw_\bo_\br_\bd. e\bex\bxp\bpo\bor\brt\bt returns an exit status of 0 unless an invalid
+ option is encountered, one of the _\bn_\ba_\bm_\be_\bs is not a valid shell
variable name, or -\b-f\bf is supplied with a _\bn_\ba_\bm_\be that is not a func-
tion.
f\bfc\bc [-\b-e\be _\be_\bn_\ba_\bm_\be] [-\b-l\bln\bnr\br] [_\bf_\bi_\br_\bs_\bt] [_\bl_\ba_\bs_\bt]
f\bfc\bc -\b-s\bs [_\bp_\ba_\bt=_\br_\be_\bp] [_\bc_\bm_\bd]
- Fix Command. In the first form, a range of commands from _\bf_\bi_\br_\bs_\bt
- to _\bl_\ba_\bs_\bt is selected from the history list. _\bF_\bi_\br_\bs_\bt and _\bl_\ba_\bs_\bt may
- be specified as a string (to locate the last command beginning
- with that string) or as a number (an index into the history
+ Fix Command. In the first form, a range of commands from _\bf_\bi_\br_\bs_\bt
+ to _\bl_\ba_\bs_\bt is selected from the history list. _\bF_\bi_\br_\bs_\bt and _\bl_\ba_\bs_\bt may
+ be specified as a string (to locate the last command beginning
+ with that string) or as a number (an index into the history
list, where a negative number is used as an offset from the cur-
rent command number). If _\bl_\ba_\bs_\bt is not specified it is set to the
- current command for listing (so that ``fc -l -10'' prints the
+ current command for listing (so that ``fc -l -10'' prints the
last 10 commands) and to _\bf_\bi_\br_\bs_\bt otherwise. If _\bf_\bi_\br_\bs_\bt is not spec-
- ified it is set to the previous command for editing and -16 for
+ ified it is set to the previous command for editing and -16 for
listing.
- The -\b-n\bn option suppresses the command numbers when listing. The
- -\b-r\br option reverses the order of the commands. If the -\b-l\bl option
- is given, the commands are listed on standard output. Other-
- wise, the editor given by _\be_\bn_\ba_\bm_\be is invoked on a file containing
- those commands. If _\be_\bn_\ba_\bm_\be is not given, the value of the F\bFC\bCE\bED\bDI\bIT\bT
- variable is used, and the value of E\bED\bDI\bIT\bTO\bOR\bR if F\bFC\bCE\bED\bDI\bIT\bT is not set.
- If neither variable is set, _\bv_\bi is used. When editing is com-
+ The -\b-n\bn option suppresses the command numbers when listing. The
+ -\b-r\br option reverses the order of the commands. If the -\b-l\bl option
+ is given, the commands are listed on standard output. Other-
+ wise, the editor given by _\be_\bn_\ba_\bm_\be is invoked on a file containing
+ those commands. If _\be_\bn_\ba_\bm_\be is not given, the value of the F\bFC\bCE\bED\bDI\bIT\bT
+ variable is used, and the value of E\bED\bDI\bIT\bTO\bOR\bR if F\bFC\bCE\bED\bDI\bIT\bT is not set.
+ If neither variable is set, _\bv_\bi is used. When editing is com-
plete, the edited commands are echoed and executed.
- In the second form, _\bc_\bo_\bm_\bm_\ba_\bn_\bd is re-executed after each instance
- of _\bp_\ba_\bt is replaced by _\br_\be_\bp. A useful alias to use with this is
- ``r="fc -s"'', so that typing ``r cc'' runs the last command
+ In the second form, _\bc_\bo_\bm_\bm_\ba_\bn_\bd is re-executed after each instance
+ of _\bp_\ba_\bt is replaced by _\br_\be_\bp. A useful alias to use with this is
+ ``r="fc -s"'', so that typing ``r cc'' runs the last command
beginning with ``cc'' and typing ``r'' re-executes the last com-
mand.
- If the first form is used, the return value is 0 unless an
- invalid option is encountered or _\bf_\bi_\br_\bs_\bt or _\bl_\ba_\bs_\bt specify history
- lines out of range. If the -\b-e\be option is supplied, the return
+ If the first form is used, the return value is 0 unless an
+ invalid option is encountered or _\bf_\bi_\br_\bs_\bt or _\bl_\ba_\bs_\bt specify history
+ lines out of range. If the -\b-e\be option is supplied, the return
value is the value of the last command executed or failure if an
error occurs with the temporary file of commands. If the second
- form is used, the return status is that of the command re-exe-
- cuted, unless _\bc_\bm_\bd does not specify a valid history line, in
+ form is used, the return status is that of the command re-exe-
+ cuted, unless _\bc_\bm_\bd does not specify a valid history line, in
which case f\bfc\bc returns failure.
f\bfg\bg [_\bj_\bo_\bb_\bs_\bp_\be_\bc]
- Resume _\bj_\bo_\bb_\bs_\bp_\be_\bc in the foreground, and make it the current job.
+ Resume _\bj_\bo_\bb_\bs_\bp_\be_\bc in the foreground, and make it the current job.
If _\bj_\bo_\bb_\bs_\bp_\be_\bc is not present, the shell's notion of the _\bc_\bu_\br_\br_\be_\bn_\bt _\bj_\bo_\bb
- is used. The return value is that of the command placed into
- the foreground, or failure if run when job control is disabled
+ is used. The return value is that of the command placed into
+ the foreground, or failure if run when job control is disabled
or, when run with job control enabled, if _\bj_\bo_\bb_\bs_\bp_\be_\bc does not spec-
- ify a valid job or _\bj_\bo_\bb_\bs_\bp_\be_\bc specifies a job that was started
+ ify a valid job or _\bj_\bo_\bb_\bs_\bp_\be_\bc specifies a job that was started
without job control.
g\bge\bet\bto\bop\bpt\bts\bs _\bo_\bp_\bt_\bs_\bt_\br_\bi_\bn_\bg _\bn_\ba_\bm_\be [_\ba_\br_\bg_\bs]
- g\bge\bet\bto\bop\bpt\bts\bs is used by shell procedures to parse positional parame-
- ters. _\bo_\bp_\bt_\bs_\bt_\br_\bi_\bn_\bg contains the option characters to be recog-
- nized; if a character is followed by a colon, the option is
- expected to have an argument, which should be separated from it
- by white space. The colon and question mark characters may not
- be used as option characters. Each time it is invoked, g\bge\bet\bto\bop\bpt\bts\bs
- places the next option in the shell variable _\bn_\ba_\bm_\be, initializing
+ g\bge\bet\bto\bop\bpt\bts\bs is used by shell procedures to parse positional parame-
+ ters. _\bo_\bp_\bt_\bs_\bt_\br_\bi_\bn_\bg contains the option characters to be recog-
+ nized; if a character is followed by a colon, the option is
+ expected to have an argument, which should be separated from it
+ by white space. The colon and question mark characters may not
+ be used as option characters. Each time it is invoked, g\bge\bet\bto\bop\bpt\bts\bs
+ places the next option in the shell variable _\bn_\ba_\bm_\be, initializing
_\bn_\ba_\bm_\be if it does not exist, and the index of the next argument to
be processed into the variable O\bOP\bPT\bTI\bIN\bND\bD. O\bOP\bPT\bTI\bIN\bND\bD is initialized to
- 1 each time the shell or a shell script is invoked. When an
- option requires an argument, g\bge\bet\bto\bop\bpt\bts\bs places that argument into
- the variable O\bOP\bPT\bTA\bAR\bRG\bG. The shell does not reset O\bOP\bPT\bTI\bIN\bND\bD automati-
- cally; it must be manually reset between multiple calls to
+ 1 each time the shell or a shell script is invoked. When an
+ option requires an argument, g\bge\bet\bto\bop\bpt\bts\bs places that argument into
+ the variable O\bOP\bPT\bTA\bAR\bRG\bG. The shell does not reset O\bOP\bPT\bTI\bIN\bND\bD automati-
+ cally; it must be manually reset between multiple calls to
g\bge\bet\bto\bop\bpt\bts\bs within the same shell invocation if a new set of parame-
ters is to be used.
- When the end of options is encountered, g\bge\bet\bto\bop\bpt\bts\bs exits with a
- return value greater than zero. O\bOP\bPT\bTI\bIN\bND\bD is set to the index of
+ When the end of options is encountered, g\bge\bet\bto\bop\bpt\bts\bs exits with a
+ return value greater than zero. O\bOP\bPT\bTI\bIN\bND\bD is set to the index of
the first non-option argument, and _\bn_\ba_\bm_\be is set to ?.
- g\bge\bet\bto\bop\bpt\bts\bs normally parses the positional parameters, but if more
+ g\bge\bet\bto\bop\bpt\bts\bs normally parses the positional parameters, but if more
arguments are given in _\ba_\br_\bg_\bs, g\bge\bet\bto\bop\bpt\bts\bs parses those instead.
- g\bge\bet\bto\bop\bpt\bts\bs can report errors in two ways. If the first character
- of _\bo_\bp_\bt_\bs_\bt_\br_\bi_\bn_\bg is a colon, _\bs_\bi_\bl_\be_\bn_\bt error reporting is used. In
- normal operation diagnostic messages are printed when invalid
- options or missing option arguments are encountered. If the
- variable O\bOP\bPT\bTE\bER\bRR\bR is set to 0, no error messages will be dis-
+ g\bge\bet\bto\bop\bpt\bts\bs can report errors in two ways. If the first character
+ of _\bo_\bp_\bt_\bs_\bt_\br_\bi_\bn_\bg is a colon, _\bs_\bi_\bl_\be_\bn_\bt error reporting is used. In
+ normal operation diagnostic messages are printed when invalid
+ options or missing option arguments are encountered. If the
+ variable O\bOP\bPT\bTE\bER\bRR\bR is set to 0, no error messages will be dis-
played, even if the first character of _\bo_\bp_\bt_\bs_\bt_\br_\bi_\bn_\bg is not a colon.
If an invalid option is seen, g\bge\bet\bto\bop\bpt\bts\bs places ? into _\bn_\ba_\bm_\be and, if
- not silent, prints an error message and unsets O\bOP\bPT\bTA\bAR\bRG\bG. If
- g\bge\bet\bto\bop\bpt\bts\bs is silent, the option character found is placed in
+ not silent, prints an error message and unsets O\bOP\bPT\bTA\bAR\bRG\bG. If
+ g\bge\bet\bto\bop\bpt\bts\bs is silent, the option character found is placed in
O\bOP\bPT\bTA\bAR\bRG\bG and no diagnostic message is printed.
- If a required argument is not found, and g\bge\bet\bto\bop\bpt\bts\bs is not silent,
- a question mark (?\b?) is placed in _\bn_\ba_\bm_\be, O\bOP\bPT\bTA\bAR\bRG\bG is unset, and a
- diagnostic message is printed. If g\bge\bet\bto\bop\bpt\bts\bs is silent, then a
- colon (:\b:) is placed in _\bn_\ba_\bm_\be and O\bOP\bPT\bTA\bAR\bRG\bG is set to the option
+ If a required argument is not found, and g\bge\bet\bto\bop\bpt\bts\bs is not silent,
+ a question mark (?\b?) is placed in _\bn_\ba_\bm_\be, O\bOP\bPT\bTA\bAR\bRG\bG is unset, and a
+ diagnostic message is printed. If g\bge\bet\bto\bop\bpt\bts\bs is silent, then a
+ colon (:\b:) is placed in _\bn_\ba_\bm_\be and O\bOP\bPT\bTA\bAR\bRG\bG is set to the option
character found.
- g\bge\bet\bto\bop\bpt\bts\bs returns true if an option, specified or unspecified, is
+ g\bge\bet\bto\bop\bpt\bts\bs returns true if an option, specified or unspecified, is
found. It returns false if the end of options is encountered or
an error occurs.
h\bha\bas\bsh\bh [-\b-l\blr\br] [-\b-p\bp _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be] [-\b-d\bdt\bt] [_\bn_\ba_\bm_\be]
Each time h\bha\bas\bsh\bh is invoked, the full pathname of the command _\bn_\ba_\bm_\be
- is determined by searching the directories in $\b$P\bPA\bAT\bTH\bH and remem-
+ is determined by searching the directories in $\b$P\bPA\bAT\bTH\bH and remem-
bered. Any previously-remembered pathname is discarded. If the
-\b-p\bp option is supplied, no path search is performed, and _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be
- is used as the full file name of the command. The -\b-r\br option
- causes the shell to forget all remembered locations. The -\b-d\bd
- option causes the shell to forget the remembered location of
- each _\bn_\ba_\bm_\be. If the -\b-t\bt option is supplied, the full pathname to
- which each _\bn_\ba_\bm_\be corresponds is printed. If multiple _\bn_\ba_\bm_\be argu-
- ments are supplied with -\b-t\bt, the _\bn_\ba_\bm_\be is printed before the
- hashed full pathname. The -\b-l\bl option causes output to be dis-
+ is used as the full file name of the command. The -\b-r\br option
+ causes the shell to forget all remembered locations. The -\b-d\bd
+ option causes the shell to forget the remembered location of
+ each _\bn_\ba_\bm_\be. If the -\b-t\bt option is supplied, the full pathname to
+ which each _\bn_\ba_\bm_\be corresponds is printed. If multiple _\bn_\ba_\bm_\be argu-
+ ments are supplied with -\b-t\bt, the _\bn_\ba_\bm_\be is printed before the
+ hashed full pathname. The -\b-l\bl option causes output to be dis-
played in a format that may be reused as input. If no arguments
- are given, or if only -\b-l\bl is supplied, information about remem-
- bered commands is printed. The return status is true unless a
+ are given, or if only -\b-l\bl is supplied, information about remem-
+ bered commands is printed. The return status is true unless a
_\bn_\ba_\bm_\be is not found or an invalid option is supplied.
h\bhe\bel\blp\bp [-\b-d\bdm\bms\bs] [_\bp_\ba_\bt_\bt_\be_\br_\bn]
- Display helpful information about builtin commands. If _\bp_\ba_\bt_\bt_\be_\br_\bn
- is specified, h\bhe\bel\blp\bp gives detailed help on all commands matching
- _\bp_\ba_\bt_\bt_\be_\br_\bn; otherwise help for all the builtins and shell control
+ Display helpful information about builtin commands. If _\bp_\ba_\bt_\bt_\be_\br_\bn
+ is specified, h\bhe\bel\blp\bp gives detailed help on all commands matching
+ _\bp_\ba_\bt_\bt_\be_\br_\bn; otherwise help for all the builtins and shell control
structures is printed.
-\b-d\bd Display a short description of each _\bp_\ba_\bt_\bt_\be_\br_\bn
-\b-m\bm Display the description of each _\bp_\ba_\bt_\bt_\be_\br_\bn in a manpage-like
h\bhi\bis\bst\bto\bor\bry\by -\b-s\bs _\ba_\br_\bg [_\ba_\br_\bg _\b._\b._\b.]
With no options, display the command history list with line num-
bers. Lines listed with a *\b* have been modified. An argument of
- _\bn lists only the last _\bn lines. If the shell variable H\bHI\bIS\bST\bTT\bTI\bIM\bME\bE-\b-
- F\bFO\bOR\bRM\bMA\bAT\bT is set and not null, it is used as a format string for
- _\bs_\bt_\br_\bf_\bt_\bi_\bm_\be(3) to display the time stamp associated with each dis-
- played history entry. No intervening blank is printed between
- the formatted time stamp and the history line. If _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be is
- supplied, it is used as the name of the history file; if not,
- the value of H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE is used. Options, if supplied, have the
+ _\bn lists only the last _\bn lines. If the shell variable H\bHI\bIS\bST\bTT\bTI\bIM\bME\bE-\b-
+ F\bFO\bOR\bRM\bMA\bAT\bT is set and not null, it is used as a format string for
+ _\bs_\bt_\br_\bf_\bt_\bi_\bm_\be(3) to display the time stamp associated with each dis-
+ played history entry. No intervening blank is printed between
+ the formatted time stamp and the history line. If _\bf_\bi_\bl_\be_\bn_\ba_\bm_\be is
+ supplied, it is used as the name of the history file; if not,
+ the value of H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE is used. Options, if supplied, have the
following meanings:
-\b-c\bc Clear the history list by deleting all the entries.
-\b-d\bd _\bo_\bf_\bf_\bs_\be_\bt
Delete the history entry at position _\bo_\bf_\bf_\bs_\be_\bt.
- -\b-a\ba Append the ``new'' history lines (history lines entered
- since the beginning of the current b\bba\bas\bsh\bh session) to the
+ -\b-a\ba Append the ``new'' history lines (history lines entered
+ since the beginning of the current b\bba\bas\bsh\bh session) to the
history file.
- -\b-n\bn Read the history lines not already read from the history
- file into the current history list. These are lines
- appended to the history file since the beginning of the
+ -\b-n\bn Read the history lines not already read from the history
+ file into the current history list. These are lines
+ appended to the history file since the beginning of the
current b\bba\bas\bsh\bh session.
-\b-r\br Read the contents of the history file and use them as the
current history.
- -\b-w\bw Write the current history to the history file, overwrit-
+ -\b-w\bw Write the current history to the history file, overwrit-
ing the history file's contents.
- -\b-p\bp Perform history substitution on the following _\ba_\br_\bg_\bs and
- display the result on the standard output. Does not
- store the results in the history list. Each _\ba_\br_\bg must be
+ -\b-p\bp Perform history substitution on the following _\ba_\br_\bg_\bs and
+ display the result on the standard output. Does not
+ store the results in the history list. Each _\ba_\br_\bg must be
quoted to disable normal history expansion.
- -\b-s\bs Store the _\ba_\br_\bg_\bs in the history list as a single entry.
- The last command in the history list is removed before
+ -\b-s\bs Store the _\ba_\br_\bg_\bs in the history list as a single entry.
+ The last command in the history list is removed before
the _\ba_\br_\bg_\bs are added.
- If the H\bHI\bIS\bST\bTT\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT variable is set, the time stamp informa-
- tion associated with each history entry is written to the his-
- tory file, marked with the history comment character. When the
- history file is read, lines beginning with the history comment
- character followed immediately by a digit are interpreted as
+ If the H\bHI\bIS\bST\bTT\bTI\bIM\bME\bEF\bFO\bOR\bRM\bMA\bAT\bT variable is set, the time stamp informa-
+ tion associated with each history entry is written to the his-
+ tory file, marked with the history comment character. When the
+ history file is read, lines beginning with the history comment
+ character followed immediately by a digit are interpreted as
timestamps for the previous history line. The return value is 0
- unless an invalid option is encountered, an error occurs while
- reading or writing the history file, an invalid _\bo_\bf_\bf_\bs_\be_\bt is sup-
+ unless an invalid option is encountered, an error occurs while
+ reading or writing the history file, an invalid _\bo_\bf_\bf_\bs_\be_\bt is sup-
plied as an argument to -\b-d\bd, or the history expansion supplied as
an argument to -\b-p\bp fails.
The first form lists the active jobs. The options have the fol-
lowing meanings:
-\b-l\bl List process IDs in addition to the normal information.
- -\b-n\bn Display information only about jobs that have changed
- status since the user was last notified of their status.
- -\b-p\bp List only the process ID of the job's process group
+ -\b-n\bn Display information only about jobs that have changed
+ status since the user was last notified of their status.
+ -\b-p\bp List only the process ID of the job's process group
leader.
-\b-r\br Restrict output to running jobs.
-\b-s\bs Restrict output to stopped jobs.
- If _\bj_\bo_\bb_\bs_\bp_\be_\bc is given, output is restricted to information about
- that job. The return status is 0 unless an invalid option is
+ If _\bj_\bo_\bb_\bs_\bp_\be_\bc is given, output is restricted to information about
+ that job. The return status is 0 unless an invalid option is
encountered or an invalid _\bj_\bo_\bb_\bs_\bp_\be_\bc is supplied.
If the -\b-x\bx option is supplied, j\bjo\bob\bbs\bs replaces any _\bj_\bo_\bb_\bs_\bp_\be_\bc found in
- _\bc_\bo_\bm_\bm_\ba_\bn_\bd or _\ba_\br_\bg_\bs with the corresponding process group ID, and
+ _\bc_\bo_\bm_\bm_\ba_\bn_\bd or _\ba_\br_\bg_\bs with the corresponding process group ID, and
executes _\bc_\bo_\bm_\bm_\ba_\bn_\bd passing it _\ba_\br_\bg_\bs, returning its exit status.
k\bki\bil\bll\bl [-\b-s\bs _\bs_\bi_\bg_\bs_\bp_\be_\bc | -\b-n\bn _\bs_\bi_\bg_\bn_\bu_\bm | -\b-_\bs_\bi_\bg_\bs_\bp_\be_\bc] [_\bp_\bi_\bd | _\bj_\bo_\bb_\bs_\bp_\be_\bc] ...
k\bki\bil\bll\bl -\b-l\bl [_\bs_\bi_\bg_\bs_\bp_\be_\bc | _\be_\bx_\bi_\bt_\b__\bs_\bt_\ba_\bt_\bu_\bs]
- Send the signal named by _\bs_\bi_\bg_\bs_\bp_\be_\bc or _\bs_\bi_\bg_\bn_\bu_\bm to the processes
- named by _\bp_\bi_\bd or _\bj_\bo_\bb_\bs_\bp_\be_\bc. _\bs_\bi_\bg_\bs_\bp_\be_\bc is either a case-insensitive
- signal name such as S\bSI\bIG\bGK\bKI\bIL\bLL\bL (with or without the S\bSI\bIG\bG prefix) or
- a signal number; _\bs_\bi_\bg_\bn_\bu_\bm is a signal number. If _\bs_\bi_\bg_\bs_\bp_\be_\bc is not
- present, then S\bSI\bIG\bGT\bTE\bER\bRM\bM is assumed. An argument of -\b-l\bl lists the
- signal names. If any arguments are supplied when -\b-l\bl is given,
- the names of the signals corresponding to the arguments are
+ Send the signal named by _\bs_\bi_\bg_\bs_\bp_\be_\bc or _\bs_\bi_\bg_\bn_\bu_\bm to the processes
+ named by _\bp_\bi_\bd or _\bj_\bo_\bb_\bs_\bp_\be_\bc. _\bs_\bi_\bg_\bs_\bp_\be_\bc is either a case-insensitive
+ signal name such as S\bSI\bIG\bGK\bKI\bIL\bLL\bL (with or without the S\bSI\bIG\bG prefix) or
+ a signal number; _\bs_\bi_\bg_\bn_\bu_\bm is a signal number. If _\bs_\bi_\bg_\bs_\bp_\be_\bc is not
+ present, then S\bSI\bIG\bGT\bTE\bER\bRM\bM is assumed. An argument of -\b-l\bl lists the
+ signal names. If any arguments are supplied when -\b-l\bl is given,
+ the names of the signals corresponding to the arguments are
listed, and the return status is 0. The _\be_\bx_\bi_\bt_\b__\bs_\bt_\ba_\bt_\bu_\bs argument to
- -\b-l\bl is a number specifying either a signal number or the exit
- status of a process terminated by a signal. k\bki\bil\bll\bl returns true
- if at least one signal was successfully sent, or false if an
+ -\b-l\bl is a number specifying either a signal number or the exit
+ status of a process terminated by a signal. k\bki\bil\bll\bl returns true
+ if at least one signal was successfully sent, or false if an
error occurs or an invalid option is encountered.
l\ble\bet\bt _\ba_\br_\bg [_\ba_\br_\bg ...]
Each _\ba_\br_\bg is an arithmetic expression to be evaluated (see A\bAR\bRI\bIT\bTH\bH-\b-
- M\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN above). If the last _\ba_\br_\bg evaluates to 0, l\ble\bet\bt
+ M\bME\bET\bTI\bIC\bC E\bEV\bVA\bAL\bLU\bUA\bAT\bTI\bIO\bON\bN above). If the last _\ba_\br_\bg evaluates to 0, l\ble\bet\bt
returns 1; 0 is returned otherwise.
l\blo\boc\bca\bal\bl [_\bo_\bp_\bt_\bi_\bo_\bn] [_\bn_\ba_\bm_\be[=_\bv_\ba_\bl_\bu_\be] ...]
- For each argument, a local variable named _\bn_\ba_\bm_\be is created, and
- assigned _\bv_\ba_\bl_\bu_\be. The _\bo_\bp_\bt_\bi_\bo_\bn can be any of the options accepted
+ For each argument, a local variable named _\bn_\ba_\bm_\be is created, and
+ assigned _\bv_\ba_\bl_\bu_\be. The _\bo_\bp_\bt_\bi_\bo_\bn can be any of the options accepted
by d\bde\bec\bcl\bla\bar\bre\be. When l\blo\boc\bca\bal\bl is used within a function, it causes the
- variable _\bn_\ba_\bm_\be to have a visible scope restricted to that func-
+ variable _\bn_\ba_\bm_\be to have a visible scope restricted to that func-
tion and its children. With no operands, l\blo\boc\bca\bal\bl writes a list of
- local variables to the standard output. It is an error to use
+ local variables to the standard output. It is an error to use
l\blo\boc\bca\bal\bl when not within a function. The return status is 0 unless
- l\blo\boc\bca\bal\bl is used outside a function, an invalid _\bn_\ba_\bm_\be is supplied,
+ l\blo\boc\bca\bal\bl is used outside a function, an invalid _\bn_\ba_\bm_\be is supplied,
or _\bn_\ba_\bm_\be is a readonly variable.
l\blo\bog\bgo\bou\but\bt Exit a login shell.
- m\bma\bap\bpf\bfi\bil\ble\be [-\b-n\bn _\bc_\bo_\bu_\bn_\bt] [-\b-O\bO _\bo_\br_\bi_\bg_\bi_\bn] [-\b-s\bs _\bc_\bo_\bu_\bn_\bt] [-\b-t\bt] [-\b-u\bu _\bf_\bd] [-\b-C\bC _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk]
+ m\bma\bap\bpf\bfi\bil\ble\be [-\b-n\bn _\bc_\bo_\bu_\bn_\bt] [-\b-O\bO _\bo_\br_\bi_\bg_\bi_\bn] [-\b-s\bs _\bc_\bo_\bu_\bn_\bt] [-\b-t\bt] [-\b-u\bu _\bf_\bd] [-\b-C\bC _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk]
[-\b-c\bc _\bq_\bu_\ba_\bn_\bt_\bu_\bm] [_\ba_\br_\br_\ba_\by]
- r\bre\bea\bad\bda\bar\brr\bra\bay\by [-\b-n\bn _\bc_\bo_\bu_\bn_\bt] [-\b-O\bO _\bo_\br_\bi_\bg_\bi_\bn] [-\b-s\bs _\bc_\bo_\bu_\bn_\bt] [-\b-t\bt] [-\b-u\bu _\bf_\bd] [-\b-C\bC _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk]
+ r\bre\bea\bad\bda\bar\brr\bra\bay\by [-\b-n\bn _\bc_\bo_\bu_\bn_\bt] [-\b-O\bO _\bo_\br_\bi_\bg_\bi_\bn] [-\b-s\bs _\bc_\bo_\bu_\bn_\bt] [-\b-t\bt] [-\b-u\bu _\bf_\bd] [-\b-C\bC _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk]
[-\b-c\bc _\bq_\bu_\ba_\bn_\bt_\bu_\bm] [_\ba_\br_\br_\ba_\by]
- Read lines from the standard input into the indexed array vari-
- able _\ba_\br_\br_\ba_\by, or from file descriptor _\bf_\bd if the -\b-u\bu option is sup-
- plied. The variable M\bMA\bAP\bPF\bFI\bIL\bLE\bE is the default _\ba_\br_\br_\ba_\by. Options, if
+ Read lines from the standard input into the indexed array vari-
+ able _\ba_\br_\br_\ba_\by, or from file descriptor _\bf_\bd if the -\b-u\bu option is sup-
+ plied. The variable M\bMA\bAP\bPF\bFI\bIL\bLE\bE is the default _\ba_\br_\br_\ba_\by. Options, if
supplied, have the following meanings:
- -\b-n\bn Copy at most _\bc_\bo_\bu_\bn_\bt lines. If _\bc_\bo_\bu_\bn_\bt is 0, all lines are
+ -\b-n\bn Copy at most _\bc_\bo_\bu_\bn_\bt lines. If _\bc_\bo_\bu_\bn_\bt is 0, all lines are
copied.
- -\b-O\bO Begin assigning to _\ba_\br_\br_\ba_\by at index _\bo_\br_\bi_\bg_\bi_\bn. The default
+ -\b-O\bO Begin assigning to _\ba_\br_\br_\ba_\by at index _\bo_\br_\bi_\bg_\bi_\bn. The default
index is 0.
-\b-s\bs Discard the first _\bc_\bo_\bu_\bn_\bt lines read.
-\b-t\bt Remove a trailing newline from each line read.
- -\b-u\bu Read lines from file descriptor _\bf_\bd instead of the stan-
+ -\b-u\bu Read lines from file descriptor _\bf_\bd instead of the stan-
dard input.
- -\b-C\bC Evaluate _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk each time _\bq_\bu_\ba_\bn_\bt_\bu_\bm lines are read. The
+ -\b-C\bC Evaluate _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk each time _\bq_\bu_\ba_\bn_\bt_\bu_\bm lines are read. The
-\b-c\bc option specifies _\bq_\bu_\ba_\bn_\bt_\bu_\bm.
- -\b-c\bc Specify the number of lines read between each call to
+ -\b-c\bc Specify the number of lines read between each call to
_\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk.
- If -\b-C\bC is specified without -\b-c\bc, the default quantum is 5000.
+ If -\b-C\bC is specified without -\b-c\bc, the default quantum is 5000.
When _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk is evaluated, it is supplied the index of the next
array element to be assigned and the line to be assigned to that
- element as additional arguments. _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk is evaluated after
+ element as additional arguments. _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk is evaluated after
the line is read but before the array element is assigned.
- If not supplied with an explicit origin, m\bma\bap\bpf\bfi\bil\ble\be will clear
+ If not supplied with an explicit origin, m\bma\bap\bpf\bfi\bil\ble\be will clear
_\ba_\br_\br_\ba_\by before assigning to it.
- m\bma\bap\bpf\bfi\bil\ble\be returns successfully unless an invalid option or option
- argument is supplied, _\ba_\br_\br_\ba_\by is invalid or unassignable, or if
+ m\bma\bap\bpf\bfi\bil\ble\be returns successfully unless an invalid option or option
+ argument is supplied, _\ba_\br_\br_\ba_\by is invalid or unassignable, or if
_\ba_\br_\br_\ba_\by is not an indexed array.
p\bpo\bop\bpd\bd [-n\bn] [+_\bn] [-_\bn]
- Removes entries from the directory stack. With no arguments,
- removes the top directory from the stack, and performs a c\bcd\bd to
+ Removes entries from the directory stack. With no arguments,
+ removes the top directory from the stack, and performs a c\bcd\bd to
the new top directory. Arguments, if supplied, have the follow-
ing meanings:
- -\b-n\bn Suppresses the normal change of directory when removing
- directories from the stack, so that only the stack is
+ -\b-n\bn Suppresses the normal change of directory when removing
+ directories from the stack, so that only the stack is
manipulated.
- +\b+_\bn Removes the _\bnth entry counting from the left of the list
- shown by d\bdi\bir\brs\bs, starting with zero. For example: ``popd
+ +\b+_\bn Removes the _\bnth entry counting from the left of the list
+ shown by d\bdi\bir\brs\bs, starting with zero. For example: ``popd
+0'' removes the first directory, ``popd +1'' the second.
-\b-_\bn Removes the _\bnth entry counting from the right of the list
- shown by d\bdi\bir\brs\bs, starting with zero. For example: ``popd
- -0'' removes the last directory, ``popd -1'' the next to
+ shown by d\bdi\bir\brs\bs, starting with zero. For example: ``popd
+ -0'' removes the last directory, ``popd -1'' the next to
last.
- If the p\bpo\bop\bpd\bd command is successful, a d\bdi\bir\brs\bs is performed as well,
- and the return status is 0. p\bpo\bop\bpd\bd returns false if an invalid
+ If the p\bpo\bop\bpd\bd command is successful, a d\bdi\bir\brs\bs is performed as well,
+ and the return status is 0. p\bpo\bop\bpd\bd returns false if an invalid
option is encountered, the directory stack is empty, a non-exis-
tent directory stack entry is specified, or the directory change
fails.
p\bpr\bri\bin\bnt\btf\bf [-\b-v\bv _\bv_\ba_\br] _\bf_\bo_\br_\bm_\ba_\bt [_\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs]
- Write the formatted _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs to the standard output under the
- control of the _\bf_\bo_\br_\bm_\ba_\bt. The -\b-v\bv option causes the output to be
- assigned to the variable _\bv_\ba_\br rather than being printed to the
+ Write the formatted _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs to the standard output under the
+ control of the _\bf_\bo_\br_\bm_\ba_\bt. The -\b-v\bv option causes the output to be
+ assigned to the variable _\bv_\ba_\br rather than being printed to the
standard output.
- The _\bf_\bo_\br_\bm_\ba_\bt is a character string which contains three types of
- objects: plain characters, which are simply copied to standard
- output, character escape sequences, which are converted and
- copied to the standard output, and format specifications, each
- of which causes printing of the next successive _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt. In
+ The _\bf_\bo_\br_\bm_\ba_\bt is a character string which contains three types of
+ objects: plain characters, which are simply copied to standard
+ output, character escape sequences, which are converted and
+ copied to the standard output, and format specifications, each
+ of which causes printing of the next successive _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt. In
addition to the standard _\bp_\br_\bi_\bn_\bt_\bf(1) format specifications, p\bpr\bri\bin\bnt\btf\bf
interprets the following extensions:
%\b%b\bb causes p\bpr\bri\bin\bnt\btf\bf to expand backslash escape sequences in the
corresponding _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt (except that \\b\c\bc terminates output,
- backslashes in \\b\'\b', \\b\"\b", and \\b\?\b? are not removed, and octal
+ backslashes in \\b\'\b', \\b\"\b", and \\b\?\b? are not removed, and octal
escapes beginning with \\b\0\b0 may contain up to four digits).
- %\b%q\bq causes p\bpr\bri\bin\bnt\btf\bf to output the corresponding _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt in a
+ %\b%q\bq causes p\bpr\bri\bin\bnt\btf\bf to output the corresponding _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt in a
format that can be reused as shell input.
%\b%(\b(_\bd_\ba_\bt_\be_\bf_\bm_\bt)\b)T\bT
- causes p\bpr\bri\bin\bnt\btf\bf to output the date-time string resulting
- from using _\bd_\ba_\bt_\be_\bf_\bm_\bt as a format string for _\bs_\bt_\br_\bf_\bt_\bi_\bm_\be(3).
+ causes p\bpr\bri\bin\bnt\btf\bf to output the date-time string resulting
+ from using _\bd_\ba_\bt_\be_\bf_\bm_\bt as a format string for _\bs_\bt_\br_\bf_\bt_\bi_\bm_\be(3).
The corresponding _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt is an integer representing the
- number of seconds since the epoch. Two special argument
- values may be used: -1 represents the current time, and
+ number of seconds since the epoch. Two special argument
+ values may be used: -1 represents the current time, and
-2 represents the time the shell was invoked.
- Arguments to non-string format specifiers are treated as C con-
+ Arguments to non-string format specifiers are treated as C con-
stants, except that a leading plus or minus sign is allowed, and
- if the leading character is a single or double quote, the value
+ if the leading character is a single or double quote, the value
is the ASCII value of the following character.
- The _\bf_\bo_\br_\bm_\ba_\bt is reused as necessary to consume all of the _\ba_\br_\bg_\bu_\b-
+ The _\bf_\bo_\br_\bm_\ba_\bt is reused as necessary to consume all of the _\ba_\br_\bg_\bu_\b-
_\bm_\be_\bn_\bt_\bs. If the _\bf_\bo_\br_\bm_\ba_\bt requires more _\ba_\br_\bg_\bu_\bm_\be_\bn_\bt_\bs than are supplied,
- the extra format specifications behave as if a zero value or
- null string, as appropriate, had been supplied. The return
+ the extra format specifications behave as if a zero value or
+ null string, as appropriate, had been supplied. The return
value is zero on success, non-zero on failure.
p\bpu\bus\bsh\bhd\bd [-\b-n\bn] [+_\bn] [-_\bn]
p\bpu\bus\bsh\bhd\bd [-\b-n\bn] [_\bd_\bi_\br]
- Adds a directory to the top of the directory stack, or rotates
- the stack, making the new top of the stack the current working
+ Adds a directory to the top of the directory stack, or rotates
+ the stack, making the new top of the stack the current working
directory. With no arguments, exchanges the top two directories
- and returns 0, unless the directory stack is empty. Arguments,
+ and returns 0, unless the directory stack is empty. Arguments,
if supplied, have the following meanings:
- -\b-n\bn Suppresses the normal change of directory when adding
- directories to the stack, so that only the stack is
+ -\b-n\bn Suppresses the normal change of directory when adding
+ directories to the stack, so that only the stack is
manipulated.
- +\b+_\bn Rotates the stack so that the _\bnth directory (counting
- from the left of the list shown by d\bdi\bir\brs\bs, starting with
+ +\b+_\bn Rotates the stack so that the _\bnth directory (counting
+ from the left of the list shown by d\bdi\bir\brs\bs, starting with
zero) is at the top.
- -\b-_\bn Rotates the stack so that the _\bnth directory (counting
- from the right of the list shown by d\bdi\bir\brs\bs, starting with
+ -\b-_\bn Rotates the stack so that the _\bnth directory (counting
+ from the right of the list shown by d\bdi\bir\brs\bs, starting with
zero) is at the top.
_\bd_\bi_\br Adds _\bd_\bi_\br to the directory stack at the top, making it the
new current working directory.
If the p\bpu\bus\bsh\bhd\bd command is successful, a d\bdi\bir\brs\bs is performed as well.
- If the first form is used, p\bpu\bus\bsh\bhd\bd returns 0 unless the cd to _\bd_\bi_\br
- fails. With the second form, p\bpu\bus\bsh\bhd\bd returns 0 unless the direc-
- tory stack is empty, a non-existent directory stack element is
- specified, or the directory change to the specified new current
+ If the first form is used, p\bpu\bus\bsh\bhd\bd returns 0 unless the cd to _\bd_\bi_\br
+ fails. With the second form, p\bpu\bus\bsh\bhd\bd returns 0 unless the direc-
+ tory stack is empty, a non-existent directory stack element is
+ specified, or the directory change to the specified new current
directory fails.
p\bpw\bwd\bd [-\b-L\bLP\bP]
- Print the absolute pathname of the current working directory.
+ Print the absolute pathname of the current working directory.
The pathname printed contains no symbolic links if the -\b-P\bP option
is supplied or the -\b-o\bo p\bph\bhy\bys\bsi\bic\bca\bal\bl option to the s\bse\bet\bt builtin command
- is enabled. If the -\b-L\bL option is used, the pathname printed may
- contain symbolic links. The return status is 0 unless an error
- occurs while reading the name of the current directory or an
+ is enabled. If the -\b-L\bL option is used, the pathname printed may
+ contain symbolic links. The return status is 0 unless an error
+ occurs while reading the name of the current directory or an
invalid option is supplied.
r\bre\bea\bad\bd [-\b-e\ber\brs\bs] [-\b-a\ba _\ba_\bn_\ba_\bm_\be] [-\b-d\bd _\bd_\be_\bl_\bi_\bm] [-\b-i\bi _\bt_\be_\bx_\bt] [-\b-n\bn _\bn_\bc_\bh_\ba_\br_\bs] [-\b-N\bN _\bn_\bc_\bh_\ba_\br_\bs] [-\b-p\bp
_\bp_\br_\bo_\bm_\bp_\bt] [-\b-t\bt _\bt_\bi_\bm_\be_\bo_\bu_\bt] [-\b-u\bu _\bf_\bd] [_\bn_\ba_\bm_\be ...]
- One line is read from the standard input, or from the file
- descriptor _\bf_\bd supplied as an argument to the -\b-u\bu option, and the
+ One line is read from the standard input, or from the file
+ descriptor _\bf_\bd supplied as an argument to the -\b-u\bu option, and the
first word is assigned to the first _\bn_\ba_\bm_\be, the second word to the
- second _\bn_\ba_\bm_\be, and so on, with leftover words and their interven-
- ing separators assigned to the last _\bn_\ba_\bm_\be. If there are fewer
+ second _\bn_\ba_\bm_\be, and so on, with leftover words and their interven-
+ ing separators assigned to the last _\bn_\ba_\bm_\be. If there are fewer
words read from the input stream than names, the remaining names
- are assigned empty values. The characters in I\bIF\bFS\bS are used to
- split the line into words. The backslash character (\\b\) may be
- used to remove any special meaning for the next character read
- and for line continuation. Options, if supplied, have the fol-
+ are assigned empty values. The characters in I\bIF\bFS\bS are used to
+ split the line into words. The backslash character (\\b\) may be
+ used to remove any special meaning for the next character read
+ and for line continuation. Options, if supplied, have the fol-
lowing meanings:
-\b-a\ba _\ba_\bn_\ba_\bm_\be
The words are assigned to sequential indices of the array
new values are assigned. Other _\bn_\ba_\bm_\be arguments are
ignored.
-\b-d\bd _\bd_\be_\bl_\bi_\bm
- The first character of _\bd_\be_\bl_\bi_\bm is used to terminate the
+ The first character of _\bd_\be_\bl_\bi_\bm is used to terminate the
input line, rather than newline.
-\b-e\be If the standard input is coming from a terminal, r\bre\bea\bad\bdl\bli\bin\bne\be
- (see R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE above) is used to obtain the line. Read-
- line uses the current (or default, if line editing was
+ (see R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE above) is used to obtain the line. Read-
+ line uses the current (or default, if line editing was
not previously active) editing settings.
-\b-i\bi _\bt_\be_\bx_\bt
- If r\bre\bea\bad\bdl\bli\bin\bne\be is being used to read the line, _\bt_\be_\bx_\bt is
+ If r\bre\bea\bad\bdl\bli\bin\bne\be is being used to read the line, _\bt_\be_\bx_\bt is
placed into the editing buffer before editing begins.
-\b-n\bn _\bn_\bc_\bh_\ba_\br_\bs
- r\bre\bea\bad\bd returns after reading _\bn_\bc_\bh_\ba_\br_\bs characters rather than
- waiting for a complete line of input, but honor a delim-
- iter if fewer than _\bn_\bc_\bh_\ba_\br_\bs characters are read before the
+ r\bre\bea\bad\bd returns after reading _\bn_\bc_\bh_\ba_\br_\bs characters rather than
+ waiting for a complete line of input, but honor a delim-
+ iter if fewer than _\bn_\bc_\bh_\ba_\br_\bs characters are read before the
delimiter.
-\b-N\bN _\bn_\bc_\bh_\ba_\br_\bs
- r\bre\bea\bad\bd returns after reading exactly _\bn_\bc_\bh_\ba_\br_\bs characters
- rather than waiting for a complete line of input, unless
- EOF is encountered or r\bre\bea\bad\bd times out. Delimiter charac-
- ters encountered in the input are not treated specially
- and do not cause r\bre\bea\bad\bd to return until _\bn_\bc_\bh_\ba_\br_\bs characters
+ r\bre\bea\bad\bd returns after reading exactly _\bn_\bc_\bh_\ba_\br_\bs characters
+ rather than waiting for a complete line of input, unless
+ EOF is encountered or r\bre\bea\bad\bd times out. Delimiter charac-
+ ters encountered in the input are not treated specially
+ and do not cause r\bre\bea\bad\bd to return until _\bn_\bc_\bh_\ba_\br_\bs characters
are read.
-\b-p\bp _\bp_\br_\bo_\bm_\bp_\bt
Display _\bp_\br_\bo_\bm_\bp_\bt on standard error, without a trailing new-
line, before attempting to read any input. The prompt is
displayed only if input is coming from a terminal.
-\b-r\br Backslash does not act as an escape character. The back-
- slash is considered to be part of the line. In particu-
- lar, a backslash-newline pair may not be used as a line
+ slash is considered to be part of the line. In particu-
+ lar, a backslash-newline pair may not be used as a line
continuation.
-\b-s\bs Silent mode. If input is coming from a terminal, charac-
ters are not echoed.
-\b-t\bt _\bt_\bi_\bm_\be_\bo_\bu_\bt
- Cause r\bre\bea\bad\bd to time out and return failure if a complete
- line of input is not read within _\bt_\bi_\bm_\be_\bo_\bu_\bt seconds. _\bt_\bi_\bm_\be_\b-
- _\bo_\bu_\bt may be a decimal number with a fractional portion
- following the decimal point. This option is only effec-
- tive if r\bre\bea\bad\bd is reading input from a terminal, pipe, or
- other special file; it has no effect when reading from
- regular files. If _\bt_\bi_\bm_\be_\bo_\bu_\bt is 0, r\bre\bea\bad\bd returns success if
- input is available on the specified file descriptor,
- failure otherwise. The exit status is greater than 128
+ Cause r\bre\bea\bad\bd to time out and return failure if a complete
+ line of input is not read within _\bt_\bi_\bm_\be_\bo_\bu_\bt seconds. _\bt_\bi_\bm_\be_\b-
+ _\bo_\bu_\bt may be a decimal number with a fractional portion
+ following the decimal point. This option is only effec-
+ tive if r\bre\bea\bad\bd is reading input from a terminal, pipe, or
+ other special file; it has no effect when reading from
+ regular files. If _\bt_\bi_\bm_\be_\bo_\bu_\bt is 0, r\bre\bea\bad\bd returns success if
+ input is available on the specified file descriptor,
+ failure otherwise. The exit status is greater than 128
if the timeout is exceeded.
-\b-u\bu _\bf_\bd Read input from file descriptor _\bf_\bd.
If no _\bn_\ba_\bm_\be_\bs are supplied, the line read is assigned to the vari-
- able R\bRE\bEP\bPL\bLY\bY. The return code is zero, unless end-of-file is
- encountered, r\bre\bea\bad\bd times out (in which case the return code is
- greater than 128), or an invalid file descriptor is supplied as
+ able R\bRE\bEP\bPL\bLY\bY. The return code is zero, unless end-of-file is
+ encountered, r\bre\bea\bad\bd times out (in which case the return code is
+ greater than 128), or an invalid file descriptor is supplied as
the argument to -\b-u\bu.
r\bre\bea\bad\bdo\bon\bnl\bly\by [-\b-a\baA\bAp\bpf\bf] [_\bn_\ba_\bm_\be[=_\bw_\bo_\br_\bd] ...]
- The given _\bn_\ba_\bm_\be_\bs are marked readonly; the values of these _\bn_\ba_\bm_\be_\bs
- may not be changed by subsequent assignment. If the -\b-f\bf option
- is supplied, the functions corresponding to the _\bn_\ba_\bm_\be_\bs are so
- marked. The -\b-a\ba option restricts the variables to indexed
- arrays; the -\b-A\bA option restricts the variables to associative
- arrays. If no _\bn_\ba_\bm_\be arguments are given, or if the -\b-p\bp option is
- supplied, a list of all readonly names is printed. The -\b-p\bp
- option causes output to be displayed in a format that may be
- reused as input. If a variable name is followed by =_\bw_\bo_\br_\bd, the
- value of the variable is set to _\bw_\bo_\br_\bd. The return status is 0
+ The given _\bn_\ba_\bm_\be_\bs are marked readonly; the values of these _\bn_\ba_\bm_\be_\bs
+ may not be changed by subsequent assignment. If the -\b-f\bf option
+ is supplied, the functions corresponding to the _\bn_\ba_\bm_\be_\bs are so
+ marked. The -\b-a\ba option restricts the variables to indexed
+ arrays; the -\b-A\bA option restricts the variables to associative
+ arrays. If no _\bn_\ba_\bm_\be arguments are given, or if the -\b-p\bp option is
+ supplied, a list of all readonly names is printed. The -\b-p\bp
+ option causes output to be displayed in a format that may be
+ reused as input. If a variable name is followed by =_\bw_\bo_\br_\bd, the
+ value of the variable is set to _\bw_\bo_\br_\bd. The return status is 0
unless an invalid option is encountered, one of the _\bn_\ba_\bm_\be_\bs is not
- a valid shell variable name, or -\b-f\bf is supplied with a _\bn_\ba_\bm_\be that
+ a valid shell variable name, or -\b-f\bf is supplied with a _\bn_\ba_\bm_\be that
is not a function.
r\bre\bet\btu\bur\brn\bn [_\bn]
- Causes a function to exit with the return value specified by _\bn.
- If _\bn is omitted, the return status is that of the last command
- executed in the function body. If used outside a function, but
- during execution of a script by the .\b. (s\bso\bou\bur\brc\bce\be) command, it
+ Causes a function to exit with the return value specified by _\bn.
+ If _\bn is omitted, the return status is that of the last command
+ executed in the function body. If used outside a function, but
+ during execution of a script by the .\b. (s\bso\bou\bur\brc\bce\be) command, it
causes the shell to stop executing that script and return either
- _\bn or the exit status of the last command executed within the
- script as the exit status of the script. If used outside a
- function and not during execution of a script by .\b., the return
+ _\bn or the exit status of the last command executed within the
+ script as the exit status of the script. If used outside a
+ function and not during execution of a script by .\b., the return
status is false. Any command associated with the R\bRE\bET\bTU\bUR\bRN\bN trap is
- executed before execution resumes after the function or script.
+ executed before execution resumes after the function or script.
s\bse\bet\bt [-\b--\b-a\bab\bbe\bef\bfh\bhk\bkm\bmn\bnp\bpt\btu\buv\bvx\bxB\bBC\bCE\bEH\bHP\bPT\bT] [-\b-o\bo _\bo_\bp_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be] [_\ba_\br_\bg ...]
s\bse\bet\bt [+\b+a\bab\bbe\bef\bfh\bhk\bkm\bmn\bnp\bpt\btu\buv\bvx\bxB\bBC\bCE\bEH\bHP\bPT\bT] [+\b+o\bo _\bo_\bp_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be] [_\ba_\br_\bg ...]
- Without options, the name and value of each shell variable are
+ Without options, the name and value of each shell variable are
displayed in a format that can be reused as input for setting or
resetting the currently-set variables. Read-only variables can-
- not be reset. In _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be, only shell variables are listed.
- The output is sorted according to the current locale. When
- options are specified, they set or unset shell attributes. Any
- arguments remaining after option processing are treated as val-
+ not be reset. In _\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be, only shell variables are listed.
+ The output is sorted according to the current locale. When
+ options are specified, they set or unset shell attributes. Any
+ arguments remaining after option processing are treated as val-
ues for the positional parameters and are assigned, in order, to
- $\b$1\b1, $\b$2\b2, .\b..\b..\b. $\b$_\bn. Options, if specified, have the following
+ $\b$1\b1, $\b$2\b2, .\b..\b..\b. $\b$_\bn. Options, if specified, have the following
meanings:
- -\b-a\ba Automatically mark variables and functions which are
- modified or created for export to the environment of
+ -\b-a\ba Automatically mark variables and functions which are
+ modified or created for export to the environment of
subsequent commands.
- -\b-b\bb Report the status of terminated background jobs immedi-
+ -\b-b\bb Report the status of terminated background jobs immedi-
ately, rather than before the next primary prompt. This
is effective only when job control is enabled.
- -\b-e\be Exit immediately if a _\bp_\bi_\bp_\be_\bl_\bi_\bn_\be (which may consist of a
- single _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd), a _\bs_\bu_\bb_\bs_\bh_\be_\bl_\bl command enclosed in
- parentheses, or one of the commands executed as part of
- a command list enclosed by braces (see S\bSH\bHE\bEL\bLL\bL G\bGR\bRA\bAM\bMM\bMA\bAR\bR
+ -\b-e\be Exit immediately if a _\bp_\bi_\bp_\be_\bl_\bi_\bn_\be (which may consist of a
+ single _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd), a _\bs_\bu_\bb_\bs_\bh_\be_\bl_\bl command enclosed in
+ parentheses, or one of the commands executed as part of
+ a command list enclosed by braces (see S\bSH\bHE\bEL\bLL\bL G\bGR\bRA\bAM\bMM\bMA\bAR\bR
above) exits with a non-zero status. The shell does not
- exit if the command that fails is part of the command
- list immediately following a w\bwh\bhi\bil\ble\be or u\bun\bnt\bti\bil\bl keyword,
- part of the test following the i\bif\bf or e\bel\bli\bif\bf reserved
- words, part of any command executed in a &\b&&\b& or |\b||\b| list
- except the command following the final &\b&&\b& or |\b||\b|, any
- command in a pipeline but the last, or if the command's
- return value is being inverted with !\b!. A trap on E\bER\bRR\bR,
+ exit if the command that fails is part of the command
+ list immediately following a w\bwh\bhi\bil\ble\be or u\bun\bnt\bti\bil\bl keyword,
+ part of the test following the i\bif\bf or e\bel\bli\bif\bf reserved
+ words, part of any command executed in a &\b&&\b& or |\b||\b| list
+ except the command following the final &\b&&\b& or |\b||\b|, any
+ command in a pipeline but the last, or if the command's
+ return value is being inverted with !\b!. A trap on E\bER\bRR\bR,
if set, is executed before the shell exits. This option
applies to the shell environment and each subshell envi-
- ronment separately (see C\bCO\bOM\bMM\bMA\bAN\bND\bD E\bEX\bXE\bEC\bCU\bUT\bTI\bIO\bON\bN E\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
+ ronment separately (see C\bCO\bOM\bMM\bMA\bAN\bND\bD E\bEX\bXE\bEC\bCU\bUT\bTI\bIO\bON\bN E\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
above), and may cause subshells to exit before executing
all the commands in the subshell.
-\b-f\bf Disable pathname expansion.
- -\b-h\bh Remember the location of commands as they are looked up
+ -\b-h\bh Remember the location of commands as they are looked up
for execution. This is enabled by default.
- -\b-k\bk All arguments in the form of assignment statements are
- placed in the environment for a command, not just those
+ -\b-k\bk All arguments in the form of assignment statements are
+ placed in the environment for a command, not just those
that precede the command name.
- -\b-m\bm Monitor mode. Job control is enabled. This option is
- on by default for interactive shells on systems that
- support it (see J\bJO\bOB\bB C\bCO\bON\bNT\bTR\bRO\bOL\bL above). Background pro-
- cesses run in a separate process group and a line con-
- taining their exit status is printed upon their comple-
+ -\b-m\bm Monitor mode. Job control is enabled. This option is
+ on by default for interactive shells on systems that
+ support it (see J\bJO\bOB\bB C\bCO\bON\bNT\bTR\bRO\bOL\bL above). Background pro-
+ cesses run in a separate process group and a line con-
+ taining their exit status is printed upon their comple-
tion.
-\b-n\bn Read commands but do not execute them. This may be used
- to check a shell script for syntax errors. This is
+ to check a shell script for syntax errors. This is
ignored by interactive shells.
-\b-o\bo _\bo_\bp_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be
The _\bo_\bp_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be can be one of the following:
Same as -\b-a\ba.
b\bbr\bra\bac\bce\bee\bex\bxp\bpa\ban\bnd\bd
Same as -\b-B\bB.
- e\bem\bma\bac\bcs\bs Use an emacs-style command line editing inter-
+ e\bem\bma\bac\bcs\bs Use an emacs-style command line editing inter-
face. This is enabled by default when the shell
is interactive, unless the shell is started with
- the -\b--\b-n\bno\boe\bed\bdi\bit\bti\bin\bng\bg option. This also affects the
+ the -\b--\b-n\bno\boe\bed\bdi\bit\bti\bin\bng\bg option. This also affects the
editing interface used for r\bre\bea\bad\bd -\b-e\be.
e\ber\brr\bre\bex\bxi\bit\bt Same as -\b-e\be.
e\ber\brr\brt\btr\bra\bac\bce\be
H\bHI\bIS\bST\bTO\bOR\bRY\bY. This option is on by default in inter-
active shells.
i\big\bgn\bno\bor\bre\bee\beo\bof\bf
- The effect is as if the shell command
- ``IGNOREEOF=10'' had been executed (see S\bSh\bhe\bel\bll\bl
+ The effect is as if the shell command
+ ``IGNOREEOF=10'' had been executed (see S\bSh\bhe\bel\bll\bl
V\bVa\bar\bri\bia\bab\bbl\ble\bes\bs above).
k\bke\bey\byw\bwo\bor\brd\bd Same as -\b-k\bk.
m\bmo\bon\bni\bit\bto\bor\br Same as -\b-m\bm.
p\bph\bhy\bys\bsi\bic\bca\bal\bl
Same as -\b-P\bP.
p\bpi\bip\bpe\bef\bfa\bai\bil\bl
- If set, the return value of a pipeline is the
- value of the last (rightmost) command to exit
- with a non-zero status, or zero if all commands
- in the pipeline exit successfully. This option
+ If set, the return value of a pipeline is the
+ value of the last (rightmost) command to exit
+ with a non-zero status, or zero if all commands
+ in the pipeline exit successfully. This option
is disabled by default.
- p\bpo\bos\bsi\bix\bx Change the behavior of b\bba\bas\bsh\bh where the default
- operation differs from the POSIX standard to
+ p\bpo\bos\bsi\bix\bx Change the behavior of b\bba\bas\bsh\bh where the default
+ operation differs from the POSIX standard to
match the standard (_\bp_\bo_\bs_\bi_\bx _\bm_\bo_\bd_\be).
p\bpr\bri\biv\bvi\bil\ble\beg\bge\bed\bd
Same as -\b-p\bp.
v\bve\ber\brb\bbo\bos\bse\be Same as -\b-v\bv.
- v\bvi\bi Use a vi-style command line editing interface.
+ v\bvi\bi Use a vi-style command line editing interface.
This also affects the editing interface used for
r\bre\bea\bad\bd -\b-e\be.
x\bxt\btr\bra\bac\bce\be Same as -\b-x\bx.
If -\b-o\bo is supplied with no _\bo_\bp_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be, the values of the
- current options are printed. If +\b+o\bo is supplied with no
- _\bo_\bp_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be, a series of s\bse\bet\bt commands to recreate the
- current option settings is displayed on the standard
+ current options are printed. If +\b+o\bo is supplied with no
+ _\bo_\bp_\bt_\bi_\bo_\bn_\b-_\bn_\ba_\bm_\be, a series of s\bse\bet\bt commands to recreate the
+ current option settings is displayed on the standard
output.
- -\b-p\bp Turn on _\bp_\br_\bi_\bv_\bi_\bl_\be_\bg_\be_\bd mode. In this mode, the $\b$E\bEN\bNV\bV and
- $\b$B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV files are not processed, shell functions are
- not inherited from the environment, and the S\bSH\bHE\bEL\bLL\bLO\bOP\bPT\bTS\bS,
- B\bBA\bAS\bSH\bHO\bOP\bPT\bTS\bS, C\bCD\bDP\bPA\bAT\bTH\bH, and G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE variables, if they
+ -\b-p\bp Turn on _\bp_\br_\bi_\bv_\bi_\bl_\be_\bg_\be_\bd mode. In this mode, the $\b$E\bEN\bNV\bV and
+ $\b$B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV files are not processed, shell functions are
+ not inherited from the environment, and the S\bSH\bHE\bEL\bLL\bLO\bOP\bPT\bTS\bS,
+ B\bBA\bAS\bSH\bHO\bOP\bPT\bTS\bS, C\bCD\bDP\bPA\bAT\bTH\bH, and G\bGL\bLO\bOB\bBI\bIG\bGN\bNO\bOR\bRE\bE variables, if they
appear in the environment, are ignored. If the shell is
- started with the effective user (group) id not equal to
- the real user (group) id, and the -\b-p\bp option is not sup-
+ started with the effective user (group) id not equal to
+ the real user (group) id, and the -\b-p\bp option is not sup-
plied, these actions are taken and the effective user id
- is set to the real user id. If the -\b-p\bp option is sup-
- plied at startup, the effective user id is not reset.
- Turning this option off causes the effective user and
+ is set to the real user id. If the -\b-p\bp option is sup-
+ plied at startup, the effective user id is not reset.
+ Turning this option off causes the effective user and
group ids to be set to the real user and group ids.
-\b-t\bt Exit after reading and executing one command.
-\b-u\bu Treat unset variables and parameters other than the spe-
- cial parameters "@" and "*" as an error when performing
- parameter expansion. If expansion is attempted on an
- unset variable or parameter, the shell prints an error
- message, and, if not interactive, exits with a non-zero
+ cial parameters "@" and "*" as an error when performing
+ parameter expansion. If expansion is attempted on an
+ unset variable or parameter, the shell prints an error
+ message, and, if not interactive, exits with a non-zero
status.
-\b-v\bv Print shell input lines as they are read.
- -\b-x\bx After expanding each _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd, f\bfo\bor\br command, c\bca\bas\bse\be
+ -\b-x\bx After expanding each _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd, f\bfo\bor\br command, c\bca\bas\bse\be
command, s\bse\bel\ble\bec\bct\bt command, or arithmetic f\bfo\bor\br command, dis-
- play the expanded value of P\bPS\bS4\b4, followed by the command
+ play the expanded value of P\bPS\bS4\b4, followed by the command
and its expanded arguments or associated word list.
- -\b-B\bB The shell performs brace expansion (see B\bBr\bra\bac\bce\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn
+ -\b-B\bB The shell performs brace expansion (see B\bBr\bra\bac\bce\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn
above). This is on by default.
- -\b-C\bC If set, b\bba\bas\bsh\bh does not overwrite an existing file with
- the >\b>, >\b>&\b&, and <\b<>\b> redirection operators. This may be
+ -\b-C\bC If set, b\bba\bas\bsh\bh does not overwrite an existing file with
+ the >\b>, >\b>&\b&, and <\b<>\b> redirection operators. This may be
overridden when creating output files by using the redi-
rection operator >\b>|\b| instead of >\b>.
-\b-E\bE If set, any trap on E\bER\bRR\bR is inherited by shell functions,
- command substitutions, and commands executed in a sub-
- shell environment. The E\bER\bRR\bR trap is normally not inher-
+ command substitutions, and commands executed in a sub-
+ shell environment. The E\bER\bRR\bR trap is normally not inher-
ited in such cases.
-\b-H\bH Enable !\b! style history substitution. This option is on
by default when the shell is interactive.
- -\b-P\bP If set, the shell does not follow symbolic links when
- executing commands such as c\bcd\bd that change the current
+ -\b-P\bP If set, the shell does not follow symbolic links when
+ executing commands such as c\bcd\bd that change the current
working directory. It uses the physical directory
structure instead. By default, b\bba\bas\bsh\bh follows the logical
- chain of directories when performing commands which
+ chain of directories when performing commands which
change the current directory.
- -\b-T\bT If set, any traps on D\bDE\bEB\bBU\bUG\bG and R\bRE\bET\bTU\bUR\bRN\bN are inherited by
- shell functions, command substitutions, and commands
- executed in a subshell environment. The D\bDE\bEB\bBU\bUG\bG and
+ -\b-T\bT If set, any traps on D\bDE\bEB\bBU\bUG\bG and R\bRE\bET\bTU\bUR\bRN\bN are inherited by
+ shell functions, command substitutions, and commands
+ executed in a subshell environment. The D\bDE\bEB\bBU\bUG\bG and
R\bRE\bET\bTU\bUR\bRN\bN traps are normally not inherited in such cases.
- -\b--\b- If no arguments follow this option, then the positional
+ -\b--\b- If no arguments follow this option, then the positional
parameters are unset. Otherwise, the positional parame-
- ters are set to the _\ba_\br_\bgs, even if some of them begin
+ ters are set to the _\ba_\br_\bgs, even if some of them begin
with a -\b-.
- -\b- Signal the end of options, cause all remaining _\ba_\br_\bgs to
+ -\b- Signal the end of options, cause all remaining _\ba_\br_\bgs to
be assigned to the positional parameters. The -\b-x\bx and -\b-v\bv
options are turned off. If there are no _\ba_\br_\bgs, the posi-
tional parameters remain unchanged.
- The options are off by default unless otherwise noted. Using +
- rather than - causes these options to be turned off. The
- options can also be specified as arguments to an invocation of
- the shell. The current set of options may be found in $\b$-\b-. The
+ The options are off by default unless otherwise noted. Using +
+ rather than - causes these options to be turned off. The
+ options can also be specified as arguments to an invocation of
+ the shell. The current set of options may be found in $\b$-\b-. The
return status is always true unless an invalid option is encoun-
tered.
s\bsh\bhi\bif\bft\bt [_\bn]
- The positional parameters from _\bn+1 ... are renamed to $\b$1\b1 .\b..\b..\b..\b.
- Parameters represented by the numbers $\b$#\b# down to $\b$#\b#-_\bn+1 are
- unset. _\bn must be a non-negative number less than or equal to
- $\b$#\b#. If _\bn is 0, no parameters are changed. If _\bn is not given,
- it is assumed to be 1. If _\bn is greater than $\b$#\b#, the positional
- parameters are not changed. The return status is greater than
+ The positional parameters from _\bn+1 ... are renamed to $\b$1\b1 .\b..\b..\b..\b.
+ Parameters represented by the numbers $\b$#\b# down to $\b$#\b#-_\bn+1 are
+ unset. _\bn must be a non-negative number less than or equal to
+ $\b$#\b#. If _\bn is 0, no parameters are changed. If _\bn is not given,
+ it is assumed to be 1. If _\bn is greater than $\b$#\b#, the positional
+ parameters are not changed. The return status is greater than
zero if _\bn is greater than $\b$#\b# or less than zero; otherwise 0.
s\bsh\bho\bop\bpt\bt [-\b-p\bpq\bqs\bsu\bu] [-\b-o\bo] [_\bo_\bp_\bt_\bn_\ba_\bm_\be ...]
Toggle the values of variables controlling optional shell behav-
ior. With no options, or with the -\b-p\bp option, a list of all set-
table options is displayed, with an indication of whether or not
- each is set. The -\b-p\bp option causes output to be displayed in a
- form that may be reused as input. Other options have the fol-
+ each is set. The -\b-p\bp option causes output to be displayed in a
+ form that may be reused as input. Other options have the fol-
lowing meanings:
-\b-s\bs Enable (set) each _\bo_\bp_\bt_\bn_\ba_\bm_\be.
-\b-u\bu Disable (unset) each _\bo_\bp_\bt_\bn_\ba_\bm_\be.
- -\b-q\bq Suppresses normal output (quiet mode); the return status
+ -\b-q\bq Suppresses normal output (quiet mode); the return status
indicates whether the _\bo_\bp_\bt_\bn_\ba_\bm_\be is set or unset. If multi-
- ple _\bo_\bp_\bt_\bn_\ba_\bm_\be arguments are given with -\b-q\bq, the return sta-
- tus is zero if all _\bo_\bp_\bt_\bn_\ba_\bm_\be_\bs are enabled; non-zero other-
+ ple _\bo_\bp_\bt_\bn_\ba_\bm_\be arguments are given with -\b-q\bq, the return sta-
+ tus is zero if all _\bo_\bp_\bt_\bn_\ba_\bm_\be_\bs are enabled; non-zero other-
wise.
- -\b-o\bo Restricts the values of _\bo_\bp_\bt_\bn_\ba_\bm_\be to be those defined for
+ -\b-o\bo Restricts the values of _\bo_\bp_\bt_\bn_\ba_\bm_\be to be those defined for
the -\b-o\bo option to the s\bse\bet\bt builtin.
- If either -\b-s\bs or -\b-u\bu is used with no _\bo_\bp_\bt_\bn_\ba_\bm_\be arguments, the dis-
+ If either -\b-s\bs or -\b-u\bu is used with no _\bo_\bp_\bt_\bn_\ba_\bm_\be arguments, the dis-
play is limited to those options which are set or unset, respec-
- tively. Unless otherwise noted, the s\bsh\bho\bop\bpt\bt options are disabled
+ tively. Unless otherwise noted, the s\bsh\bho\bop\bpt\bt options are disabled
(unset) by default.
- The return status when listing options is zero if all _\bo_\bp_\bt_\bn_\ba_\bm_\be_\bs
- are enabled, non-zero otherwise. When setting or unsetting
- options, the return status is zero unless an _\bo_\bp_\bt_\bn_\ba_\bm_\be is not a
+ The return status when listing options is zero if all _\bo_\bp_\bt_\bn_\ba_\bm_\be_\bs
+ are enabled, non-zero otherwise. When setting or unsetting
+ options, the return status is zero unless an _\bo_\bp_\bt_\bn_\ba_\bm_\be is not a
valid shell option.
The list of s\bsh\bho\bop\bpt\bt options is:
- a\bau\but\bto\boc\bcd\bd If set, a command name that is the name of a directory
- is executed as if it were the argument to the c\bcd\bd com-
+ a\bau\but\bto\boc\bcd\bd If set, a command name that is the name of a directory
+ is executed as if it were the argument to the c\bcd\bd com-
mand. This option is only used by interactive shells.
c\bcd\bda\bab\bbl\ble\be_\b_v\bva\bar\brs\bs
- If set, an argument to the c\bcd\bd builtin command that is
- not a directory is assumed to be the name of a variable
+ If set, an argument to the c\bcd\bd builtin command that is
+ not a directory is assumed to be the name of a variable
whose value is the directory to change to.
c\bcd\bds\bsp\bpe\bel\bll\bl If set, minor errors in the spelling of a directory com-
- ponent in a c\bcd\bd command will be corrected. The errors
+ ponent in a c\bcd\bd command will be corrected. The errors
checked for are transposed characters, a missing charac-
- ter, and one character too many. If a correction is
- found, the corrected file name is printed, and the com-
- mand proceeds. This option is only used by interactive
+ ter, and one character too many. If a correction is
+ found, the corrected file name is printed, and the com-
+ mand proceeds. This option is only used by interactive
shells.
c\bch\bhe\bec\bck\bkh\bha\bas\bsh\bh
If set, b\bba\bas\bsh\bh checks that a command found in the hash ta-
- ble exists before trying to execute it. If a hashed
- command no longer exists, a normal path search is per-
+ ble exists before trying to execute it. If a hashed
+ command no longer exists, a normal path search is per-
formed.
c\bch\bhe\bec\bck\bkj\bjo\bob\bbs\bs
If set, b\bba\bas\bsh\bh lists the status of any stopped and running
- jobs before exiting an interactive shell. If any jobs
+ jobs before exiting an interactive shell. If any jobs
are running, this causes the exit to be deferred until a
- second exit is attempted without an intervening command
- (see J\bJO\bOB\bB C\bCO\bON\bNT\bTR\bRO\bOL\bL above). The shell always postpones
+ second exit is attempted without an intervening command
+ (see J\bJO\bOB\bB C\bCO\bON\bNT\bTR\bRO\bOL\bL above). The shell always postpones
exiting if any jobs are stopped.
c\bch\bhe\bec\bck\bkw\bwi\bin\bns\bsi\biz\bze\be
- If set, b\bba\bas\bsh\bh checks the window size after each command
- and, if necessary, updates the values of L\bLI\bIN\bNE\bES\bS and C\bCO\bOL\bL-\b-
+ If set, b\bba\bas\bsh\bh checks the window size after each command
+ and, if necessary, updates the values of L\bLI\bIN\bNE\bES\bS and C\bCO\bOL\bL-\b-
U\bUM\bMN\bNS\bS.
- c\bcm\bmd\bdh\bhi\bis\bst\bt If set, b\bba\bas\bsh\bh attempts to save all lines of a multiple-
- line command in the same history entry. This allows
+ c\bcm\bmd\bdh\bhi\bis\bst\bt If set, b\bba\bas\bsh\bh attempts to save all lines of a multiple-
+ line command in the same history entry. This allows
easy re-editing of multi-line commands.
c\bco\bom\bmp\bpa\bat\bt3\b31\b1
If set, b\bba\bas\bsh\bh changes its behavior to that of version 3.1
- with respect to quoted arguments to the conditional com-
- mand's =\b=~\b~ operator.
+ with respect to quoted arguments to the [\b[[\b[ conditional
+ command's =\b=~\b~ operator.
c\bco\bom\bmp\bpa\bat\bt3\b32\b2
If set, b\bba\bas\bsh\bh changes its behavior to that of version 3.2
- with respect to locale-specific string comparison when
- using the conditional command's <\b< and >\b> operators.
+ with respect to locale-specific string comparison when
+ using the [\b[[\b[ conditional command's <\b< and >\b> operators.
+ Bash versions prior to bash-4.1 use ASCII collation and
+ _\bs_\bt_\br_\bc_\bm_\bp(3); bash-4.1 and later use the current locale's
+ collation sequence and _\bs_\bt_\br_\bc_\bo_\bl_\bl(3).
c\bco\bom\bmp\bpa\bat\bt4\b40\b0
If set, b\bba\bas\bsh\bh changes its behavior to that of version 4.0
with respect to locale-specific string comparison when
- using the conditional command's <\b< and >\b> operators and
- the effect of interrupting a command list.
+ using the [\b[[\b[ conditional command's <\b< and >\b> operators
+ (see previous item) and the effect of interrupting a
+ command list.
c\bco\bom\bmp\bpa\bat\bt4\b41\b1
- @item compat41 If set, b\bba\bas\bsh\bh, when in posix mode, treats
+ @item compat41 If set, b\bba\bas\bsh\bh, when in posix mode, treats
a single quote in a double-quoted parameter expansion as
- a special character. The single quotes must match (an
- even number) and the characters between the single
- quotes are considered quoted. This is the behavior of
+ a special character. The single quotes must match (an
+ even number) and the characters between the single
+ quotes are considered quoted. This is the behavior of
posix mode through version 4.1. The default bash behav-
ior remains as in previous versions.
d\bdi\bir\brs\bsp\bpe\bel\bll\bl
- If set, b\bba\bas\bsh\bh attempts spelling correction on directory
- names during word completion if the directory name ini-
+ If set, b\bba\bas\bsh\bh attempts spelling correction on directory
+ names during word completion if the directory name ini-
tially supplied does not exist.
- d\bdo\bot\btg\bgl\blo\bob\bb If set, b\bba\bas\bsh\bh includes filenames beginning with a `.' in
+ d\bdo\bot\btg\bgl\blo\bob\bb If set, b\bba\bas\bsh\bh includes filenames beginning with a `.' in
the results of pathname expansion.
e\bex\bxe\bec\bcf\bfa\bai\bil\bl
If set, a non-interactive shell will not exit if it can-
- not execute the file specified as an argument to the
- e\bex\bxe\bec\bc builtin command. An interactive shell does not
+ not execute the file specified as an argument to the
+ e\bex\bxe\bec\bc builtin command. An interactive shell does not
exit if e\bex\bxe\bec\bc fails.
e\bex\bxp\bpa\ban\bnd\bd_\b_a\bal\bli\bia\bas\bse\bes\bs
- If set, aliases are expanded as described above under
+ If set, aliases are expanded as described above under
A\bAL\bLI\bIA\bAS\bSE\bES\bS. This option is enabled by default for interac-
tive shells.
e\bex\bxt\btd\bde\beb\bbu\bug\bg
- If set, behavior intended for use by debuggers is
+ If set, behavior intended for use by debuggers is
enabled:
1\b1.\b. The -\b-F\bF option to the d\bde\bec\bcl\bla\bar\bre\be builtin displays the
source file name and line number corresponding to
each function name supplied as an argument.
- 2\b2.\b. If the command run by the D\bDE\bEB\bBU\bUG\bG trap returns a
- non-zero value, the next command is skipped and
+ 2\b2.\b. If the command run by the D\bDE\bEB\bBU\bUG\bG trap returns a
+ non-zero value, the next command is skipped and
not executed.
- 3\b3.\b. If the command run by the D\bDE\bEB\bBU\bUG\bG trap returns a
- value of 2, and the shell is executing in a sub-
- routine (a shell function or a shell script exe-
- cuted by the .\b. or s\bso\bou\bur\brc\bce\be builtins), a call to
+ 3\b3.\b. If the command run by the D\bDE\bEB\bBU\bUG\bG trap returns a
+ value of 2, and the shell is executing in a sub-
+ routine (a shell function or a shell script exe-
+ cuted by the .\b. or s\bso\bou\bur\brc\bce\be builtins), a call to
r\bre\bet\btu\bur\brn\bn is simulated.
- 4\b4.\b. B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGC\bC and B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGV\bV are updated as described
+ 4\b4.\b. B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGC\bC and B\bBA\bAS\bSH\bH_\b_A\bAR\bRG\bGV\bV are updated as described
in their descriptions above.
- 5\b5.\b. Function tracing is enabled: command substitu-
+ 5\b5.\b. Function tracing is enabled: command substitu-
tion, shell functions, and subshells invoked with
(\b( _\bc_\bo_\bm_\bm_\ba_\bn_\bd )\b) inherit the D\bDE\bEB\bBU\bUG\bG and R\bRE\bET\bTU\bUR\bRN\bN traps.
- 6\b6.\b. Error tracing is enabled: command substitution,
- shell functions, and subshells invoked with (\b(
+ 6\b6.\b. Error tracing is enabled: command substitution,
+ shell functions, and subshells invoked with (\b(
_\bc_\bo_\bm_\bm_\ba_\bn_\bd )\b) inherit the E\bER\bRR\bR trap.
e\bex\bxt\btg\bgl\blo\bob\bb If set, the extended pattern matching features described
above under P\bPa\bat\bth\bhn\bna\bam\bme\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn are enabled.
e\bex\bxt\btq\bqu\buo\bot\bte\be
- If set, $\b$'_\bs_\bt_\br_\bi_\bn_\bg' and $\b$"_\bs_\bt_\br_\bi_\bn_\bg" quoting is performed
- within $\b${\b{_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br}\b} expansions enclosed in double
+ If set, $\b$'_\bs_\bt_\br_\bi_\bn_\bg' and $\b$"_\bs_\bt_\br_\bi_\bn_\bg" quoting is performed
+ within $\b${\b{_\bp_\ba_\br_\ba_\bm_\be_\bt_\be_\br}\b} expansions enclosed in double
quotes. This option is enabled by default.
f\bfa\bai\bil\blg\bgl\blo\bob\bb
- If set, patterns which fail to match filenames during
+ If set, patterns which fail to match filenames during
pathname expansion result in an expansion error.
f\bfo\bor\brc\bce\be_\b_f\bfi\big\bgn\bno\bor\bre\be
- If set, the suffixes specified by the F\bFI\bIG\bGN\bNO\bOR\bRE\bE shell
- variable cause words to be ignored when performing word
+ If set, the suffixes specified by the F\bFI\bIG\bGN\bNO\bOR\bRE\bE shell
+ variable cause words to be ignored when performing word
completion even if the ignored words are the only possi-
ble completions. See S\bSH\bHE\bEL\bLL\bL V\bVA\bAR\bRI\bIA\bAB\bBL\bLE\bES\bS above for a
- description of F\bFI\bIG\bGN\bNO\bOR\bRE\bE. This option is enabled by
+ description of F\bFI\bIG\bGN\bNO\bOR\bRE\bE. This option is enabled by
default.
g\bgl\blo\bob\bbs\bst\bta\bar\br
If set, the pattern *\b**\b* used in a pathname expansion con-
If set, shell error messages are written in the standard
GNU error message format.
h\bhi\bis\bst\bta\bap\bpp\bpe\ben\bnd\bd
- If set, the history list is appended to the file named
- by the value of the H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE variable when the shell
+ If set, the history list is appended to the file named
+ by the value of the H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE variable when the shell
exits, rather than overwriting the file.
h\bhi\bis\bst\btr\bre\bee\bed\bdi\bit\bt
- If set, and r\bre\bea\bad\bdl\bli\bin\bne\be is being used, a user is given the
+ If set, and r\bre\bea\bad\bdl\bli\bin\bne\be is being used, a user is given the
opportunity to re-edit a failed history substitution.
h\bhi\bis\bst\btv\bve\ber\bri\bif\bfy\by
- If set, and r\bre\bea\bad\bdl\bli\bin\bne\be is being used, the results of his-
- tory substitution are not immediately passed to the
- shell parser. Instead, the resulting line is loaded
+ If set, and r\bre\bea\bad\bdl\bli\bin\bne\be is being used, the results of his-
+ tory substitution are not immediately passed to the
+ shell parser. Instead, the resulting line is loaded
into the r\bre\bea\bad\bdl\bli\bin\bne\be editing buffer, allowing further modi-
fication.
h\bho\bos\bst\btc\bco\bom\bmp\bpl\ble\bet\bte\be
If set, and r\bre\bea\bad\bdl\bli\bin\bne\be is being used, b\bba\bas\bsh\bh will attempt to
- perform hostname completion when a word containing a @\b@
- is being completed (see C\bCo\bom\bmp\bpl\ble\bet\bti\bin\bng\bg under R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE
+ perform hostname completion when a word containing a @\b@
+ is being completed (see C\bCo\bom\bmp\bpl\ble\bet\bti\bin\bng\bg under R\bRE\bEA\bAD\bDL\bLI\bIN\bNE\bE
above). This is enabled by default.
h\bhu\bup\bpo\bon\bne\bex\bxi\bit\bt
If set, b\bba\bas\bsh\bh will send S\bSI\bIG\bGH\bHU\bUP\bP to all jobs when an inter-
active login shell exits.
i\bin\bnt\bte\ber\bra\bac\bct\bti\biv\bve\be_\b_c\bco\bom\bmm\bme\ben\bnt\bts\bs
If set, allow a word beginning with #\b# to cause that word
- and all remaining characters on that line to be ignored
- in an interactive shell (see C\bCO\bOM\bMM\bME\bEN\bNT\bTS\bS above). This
+ and all remaining characters on that line to be ignored
+ in an interactive shell (see C\bCO\bOM\bMM\bME\bEN\bNT\bTS\bS above). This
option is enabled by default.
l\bla\bas\bst\btp\bpi\bip\bpe\be
- If set, and job control is not active, the shell runs
+ If set, and job control is not active, the shell runs
the last command of a pipeline not executed in the back-
ground in the current shell environment.
- l\bli\bit\bth\bhi\bis\bst\bt If set, and the c\bcm\bmd\bdh\bhi\bis\bst\bt option is enabled, multi-line
+ l\bli\bit\bth\bhi\bis\bst\bt If set, and the c\bcm\bmd\bdh\bhi\bis\bst\bt option is enabled, multi-line
commands are saved to the history with embedded newlines
rather than using semicolon separators where possible.
l\blo\bog\bgi\bin\bn_\b_s\bsh\bhe\bel\bll\bl
- The shell sets this option if it is started as a login
- shell (see I\bIN\bNV\bVO\bOC\bCA\bAT\bTI\bIO\bON\bN above). The value may not be
+ The shell sets this option if it is started as a login
+ shell (see I\bIN\bNV\bVO\bOC\bCA\bAT\bTI\bIO\bON\bN above). The value may not be
changed.
m\bma\bai\bil\blw\bwa\bar\brn\bn
- If set, and a file that b\bba\bas\bsh\bh is checking for mail has
- been accessed since the last time it was checked, the
- message ``The mail in _\bm_\ba_\bi_\bl_\bf_\bi_\bl_\be has been read'' is dis-
+ If set, and a file that b\bba\bas\bsh\bh is checking for mail has
+ been accessed since the last time it was checked, the
+ message ``The mail in _\bm_\ba_\bi_\bl_\bf_\bi_\bl_\be has been read'' is dis-
played.
n\bno\bo_\b_e\bem\bmp\bpt\bty\by_\b_c\bcm\bmd\bd_\b_c\bco\bom\bmp\bpl\ble\bet\bti\bio\bon\bn
- If set, and r\bre\bea\bad\bdl\bli\bin\bne\be is being used, b\bba\bas\bsh\bh will not
+ If set, and r\bre\bea\bad\bdl\bli\bin\bne\be is being used, b\bba\bas\bsh\bh will not
attempt to search the P\bPA\bAT\bTH\bH for possible completions when
completion is attempted on an empty line.
n\bno\boc\bca\bas\bse\beg\bgl\blo\bob\bb
- If set, b\bba\bas\bsh\bh matches filenames in a case-insensitive
+ If set, b\bba\bas\bsh\bh matches filenames in a case-insensitive
fashion when performing pathname expansion (see P\bPa\bat\bth\bhn\bna\bam\bme\be
E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn above).
n\bno\boc\bca\bas\bse\bem\bma\bat\btc\bch\bh
- If set, b\bba\bas\bsh\bh matches patterns in a case-insensitive
+ If set, b\bba\bas\bsh\bh matches patterns in a case-insensitive
fashion when performing matching while executing c\bca\bas\bse\be or
[\b[[\b[ conditional commands.
n\bnu\bul\bll\blg\bgl\blo\bob\bb
- If set, b\bba\bas\bsh\bh allows patterns which match no files (see
- P\bPa\bat\bth\bhn\bna\bam\bme\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn above) to expand to a null string,
+ If set, b\bba\bas\bsh\bh allows patterns which match no files (see
+ P\bPa\bat\bth\bhn\bna\bam\bme\be E\bEx\bxp\bpa\ban\bns\bsi\bio\bon\bn above) to expand to a null string,
rather than themselves.
p\bpr\bro\bog\bgc\bco\bom\bmp\bp
If set, the programmable completion facilities (see P\bPr\bro\bo-\b-
enabled by default.
p\bpr\bro\bom\bmp\bpt\btv\bva\bar\brs\bs
If set, prompt strings undergo parameter expansion, com-
- mand substitution, arithmetic expansion, and quote
- removal after being expanded as described in P\bPR\bRO\bOM\bMP\bPT\bTI\bIN\bNG\bG
+ mand substitution, arithmetic expansion, and quote
+ removal after being expanded as described in P\bPR\bRO\bOM\bMP\bPT\bTI\bIN\bNG\bG
above. This option is enabled by default.
r\bre\bes\bst\btr\bri\bic\bct\bte\bed\bd_\b_s\bsh\bhe\bel\bll\bl
- The shell sets this option if it is started in
+ The shell sets this option if it is started in
restricted mode (see R\bRE\bES\bST\bTR\bRI\bIC\bCT\bTE\bED\bD S\bSH\bHE\bEL\bLL\bL below). The value
- may not be changed. This is not reset when the startup
- files are executed, allowing the startup files to dis-
+ may not be changed. This is not reset when the startup
+ files are executed, allowing the startup files to dis-
cover whether or not a shell is restricted.
s\bsh\bhi\bif\bft\bt_\b_v\bve\ber\brb\bbo\bos\bse\be
- If set, the s\bsh\bhi\bif\bft\bt builtin prints an error message when
+ If set, the s\bsh\bhi\bif\bft\bt builtin prints an error message when
the shift count exceeds the number of positional parame-
ters.
s\bso\bou\bur\brc\bce\bep\bpa\bat\bth\bh
If set, the s\bso\bou\bur\brc\bce\be (.\b.) builtin uses the value of P\bPA\bAT\bTH\bH to
- find the directory containing the file supplied as an
+ find the directory containing the file supplied as an
argument. This option is enabled by default.
x\bxp\bpg\bg_\b_e\bec\bch\bho\bo
- If set, the e\bec\bch\bho\bo builtin expands backslash-escape
+ If set, the e\bec\bch\bho\bo builtin expands backslash-escape
sequences by default.
s\bsu\bus\bsp\bpe\ben\bnd\bd [-\b-f\bf]
- Suspend the execution of this shell until it receives a S\bSI\bIG\bGC\bCO\bON\bNT\bT
+ Suspend the execution of this shell until it receives a S\bSI\bIG\bGC\bCO\bON\bNT\bT
signal. A login shell cannot be suspended; the -\b-f\bf option can be
used to override this and force the suspension. The return sta-
- tus is 0 unless the shell is a login shell and -\b-f\bf is not sup-
+ tus is 0 unless the shell is a login shell and -\b-f\bf is not sup-
plied, or if job control is not enabled.
t\bte\bes\bst\bt _\be_\bx_\bp_\br
[\b[ _\be_\bx_\bp_\br ]\b]
- Return a status of 0 or 1 depending on the evaluation of the
- conditional expression _\be_\bx_\bp_\br. Each operator and operand must be
- a separate argument. Expressions are composed of the primaries
- described above under C\bCO\bON\bND\bDI\bIT\bTI\bIO\bON\bNA\bAL\bL E\bEX\bXP\bPR\bRE\bES\bSS\bSI\bIO\bON\bNS\bS. t\bte\bes\bst\bt does not
+ Return a status of 0 or 1 depending on the evaluation of the
+ conditional expression _\be_\bx_\bp_\br. Each operator and operand must be
+ a separate argument. Expressions are composed of the primaries
+ described above under C\bCO\bON\bND\bDI\bIT\bTI\bIO\bON\bNA\bAL\bL E\bEX\bXP\bPR\bRE\bES\bSS\bSI\bIO\bON\bNS\bS. t\bte\bes\bst\bt does not
accept any options, nor does it accept and ignore an argument of
-\b--\b- as signifying the end of options.
- Expressions may be combined using the following operators,
+ Expressions may be combined using the following operators,
listed in decreasing order of precedence. The evaluation
- depends on the number of arguments; see below. Operator prece-
+ depends on the number of arguments; see below. Operator prece-
dence is used when there are five or more arguments.
!\b! _\be_\bx_\bp_\br True if _\be_\bx_\bp_\br is false.
(\b( _\be_\bx_\bp_\br )\b)
- Returns the value of _\be_\bx_\bp_\br. This may be used to override
+ Returns the value of _\be_\bx_\bp_\br. This may be used to override
the normal precedence of operators.
_\be_\bx_\bp_\br_\b1 -a\ba _\be_\bx_\bp_\br_\b2
True if both _\be_\bx_\bp_\br_\b1 and _\be_\bx_\bp_\br_\b2 are true.
null.
2 arguments
If the first argument is !\b!, the expression is true if and
- only if the second argument is null. If the first argu-
- ment is one of the unary conditional operators listed
- above under C\bCO\bON\bND\bDI\bIT\bTI\bIO\bON\bNA\bAL\bL E\bEX\bXP\bPR\bRE\bES\bSS\bSI\bIO\bON\bNS\bS, the expression is
+ only if the second argument is null. If the first argu-
+ ment is one of the unary conditional operators listed
+ above under C\bCO\bON\bND\bDI\bIT\bTI\bIO\bON\bNA\bAL\bL E\bEX\bXP\bPR\bRE\bES\bSS\bSI\bIO\bON\bNS\bS, the expression is
true if the unary test is true. If the first argument is
not a valid unary conditional operator, the expression is
false.
3 arguments
The following conditions are applied in the order listed.
- If the second argument is one of the binary conditional
+ If the second argument is one of the binary conditional
operators listed above under C\bCO\bON\bND\bDI\bIT\bTI\bIO\bON\bNA\bAL\bL E\bEX\bXP\bPR\bRE\bES\bSS\bSI\bIO\bON\bNS\bS, the
result of the expression is the result of the binary test
- using the first and third arguments as operands. The -\b-a\ba
- and -\b-o\bo operators are considered binary operators when
- there are three arguments. If the first argument is !\b!,
- the value is the negation of the two-argument test using
+ using the first and third arguments as operands. The -\b-a\ba
+ and -\b-o\bo operators are considered binary operators when
+ there are three arguments. If the first argument is !\b!,
+ the value is the negation of the two-argument test using
the second and third arguments. If the first argument is
exactly (\b( and the third argument is exactly )\b), the result
- is the one-argument test of the second argument. Other-
+ is the one-argument test of the second argument. Other-
wise, the expression is false.
4 arguments
If the first argument is !\b!, the result is the negation of
- the three-argument expression composed of the remaining
+ the three-argument expression composed of the remaining
arguments. Otherwise, the expression is parsed and eval-
- uated according to precedence using the rules listed
+ uated according to precedence using the rules listed
above.
5 or more arguments
- The expression is parsed and evaluated according to
+ The expression is parsed and evaluated according to
precedence using the rules listed above.
+ When used with t\bte\bes\bst\bt or [\b[, the <\b< and >\b> operators sort lexico-
+ graphically using ASCII ordering.
+
t\bti\bim\bme\bes\bs Print the accumulated user and system times for the shell and
for processes run from the shell. The return status is 0.
-GNU Bash-4.2 2010 December 6 BASH(1)
+GNU Bash-4.2 2010 December 28 BASH(1)
.\" Case Western Reserve University
.\" chet@po.cwru.edu
.\"
-.\" Last Change: Fri Dec 24 16:00:06 EST 2010
+.\" Last Change: Tue Dec 28 13:41:43 EST 2010
.\"
.\" bash_builtins, strip all but Built-Ins section
.if \n(zZ=1 .ig zZ
.if \n(zY=1 .ig zY
-.TH BASH 1 "2010 December 24" "GNU Bash-4.2"
+.TH BASH 1 "2010 December 28" "GNU Bash-4.2"
.\"
.\" There's some problem with having a `@'
.\" in a tagged paragraph with the BSD man macros.
as primaries.
.if t .sp 0.5
.if n .sp 1
-When used with \fB[[\fP, The \fB<\fP and \fB>\fP operators sort
+When used with \fB[[\fP, the \fB<\fP and \fB>\fP operators sort
lexicographically using the current locale.
.if t .sp 0.5
.if n .sp 1
The values assigned to the array members are as follows:
.sp .5
.RS
-.PD 0
.TP 24
.B BASH_VERSINFO[\fR0\fP]
The major version number (the \fIrelease\fP).
The value of
.SM
.BR MACHTYPE .
-.PD
.RE
.TP
.B BASH_VERSION
.if n ".:~:/usr".
.TP
.B COLUMNS
-Used by the \fBselect\fP builtin command to determine the terminal width
+Used by the \fBselect\fP compound command to determine the terminal width
when printing selection lists. Automatically set upon receipt of a
.SM
.BR SIGWINCH .
This variable determines the locale category used for number formatting.
.TP
.B LINES
-Used by the \fBselect\fP builtin command to determine the column length
+Used by the \fBselect\fP compound command to determine the column length
for printing selection lists. Automatically set upon receipt of a
.SM
.BR SIGWINCH .
value \fB$\(aq\enreal\et%3lR\enuser\et%3lU\ensys\t%3lS\(aq\fP.
If the value is null, no timing information is displayed.
A trailing newline is added when the format string is displayed.
+.PD 0
.TP
.B TMOUT
If set to a value greater than zero,
option to specify an indexed array and a
.B \-A
option to specify an associative array.
+If both options are supplied,
+.B \-A
+takes precedence.
The
.B read
builtin accepts a
expanded and that value is used in the rest of the substitution, rather
than the value of \fIparameter\fP itself.
This is known as \fIindirect expansion\fP.
-The exceptions to this are the expansions of ${\fB!\\fPfIprefix\fP\fB*\fP} and
+The exceptions to this are the expansions of ${\fB!\fP\fIprefix\fP\fB*\fP} and
${\fB!\fP\fIname\fP[\fI@\fP]} described below.
The exclamation point must immediately follow the left brace in order to
introduce indirection.
.PP
\fICommand substitution\fP allows the output of a command to replace
the command name. There are two forms:
-.PP
.RS
.PP
\fB$(\fP\fIcommand\fP\|\fB)\fP
links and operate on the target of the link, rather than the link itself.
.if t .sp 0.5
.if n .sp 1
-When used with \fB[[\fP, The \fB<\fP and \fB>\fP operators sort
+When used with \fB[[\fP, the \fB<\fP and \fB>\fP operators sort
lexicographically using the current locale.
+The \fBtest\fP command sorts using ASCII ordering.
.sp 1
.PD 0
.TP
.SH COMMAND EXECUTION ENVIRONMENT
The shell has an \fIexecution environment\fP, which consists of the
following:
-.if n .sp 1
.IP \(bu
open files inherited by the shell at invocation, as modified by
redirections supplied to the \fBexec\fP builtin
may not be used to destroy an array variable and \fB+r\fP will not
remove the readonly attribute.
When used in a function, makes each
-\fIname\fP local, as with the
+\fIname\fP local, as with the
.B local
command,
-unless the \fB\-g\P option is supplied,
+unless the \fB\-g\fP option is supplied,
If a variable name is followed by =\fIvalue\fP, the value of
the variable is set to \fIvalue\fP.
The return value is 0 unless an invalid option is encountered,
.B \-s
Display only a short usage synopsis for each \fIpattern\fP
.PD
-.RE
+.PP
The return status is 0 unless no command matches
.IR pattern .
+.RE
.TP
\fBhistory [\fIn\fP]
.PD 0
invalid file descriptor is supplied as the argument to \fB\-u\fP.
.RE
.TP
-\fBreadonly\fP [\fB\-aApf\fP] [\fIname\fP[=\fIword\fP] ...]
+\fBreadonly\fP [\fB\-aAf\fP] [\fB\-p\fP] [\fIname\fP[=\fIword\fP] ...]
.PD
The given
\fInames\fP are marked readonly; the values of these
option restricts the variables to indexed arrays; the
.B \-A
option restricts the variables to associative arrays.
+If both options are supplied,
+.B \-A
+takes precedence.
If no
.I name
arguments are given, or if the
.B \-p
option is supplied, a list of all readonly names is printed.
+The other options may be used to restrict the output to a subset of
+the set of readonly names.
The
.B \-p
option causes output to be displayed in a format that
If set,
.B bash
changes its behavior to that of version 3.1 with respect to quoted
-arguments to the conditional command's \fB=~\fP operator.
+arguments to the \fB[[\fP conditional command's \fB=~\fP operator.
.TP 8
.B compat32
If set,
.B bash
changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the conditional command's \fB<\fP and \fB>\fP
-operators.
+string comparison when using the \fB[[\fP
+conditional command's \fB<\fP and \fB>\fP operators.
+Bash versions prior to bash-4.1 use ASCII collation and
+.IR strcmp (3);
+bash-4.1 and later
+use the current locale's collation sequence and
+.IR strcoll (3).
.TP 8
.B compat40
If set,
.B bash
changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the conditional command's \fB<\fP and \fB>\fP
-operators and the effect of interrupting a command list.
+string comparison when using the \fB[[\fP
+conditional command's \fB<\fP and \fB>\fP operators (see previous item)
+and the effect of interrupting a command list.
.TP 8
.B compat41
-@item compat41
If set,
.BR bash ,
when in posix mode, treats a single quote in a double-quoted
.TP 8
.B globstar
If set, the pattern \fB**\fP used in a pathname expansion context will
-match a files and zero or more directories and subdirectories.
+match all files and zero or more directories and subdirectories.
If the pattern is followed by a \fB/\fP, only directories and
subdirectories match.
.TP 8
If set, the \fBecho\fP builtin expands backslash-escape sequences
by default.
.RE
+.PD
.TP
\fBsuspend\fP [\fB\-f\fP]
Suspend the execution of this shell until it receives a
5 or more arguments
The expression is parsed and evaluated according to precedence
using the rules listed above.
+.if t .sp 0.5
+.if n .sp 1
+.LP
+When used with \fBtest\fP or \fB[\fP, the \fB<\fP and \fB>\fP operators
+sort lexicographically using ASCII ordering.
.RE
.PD
.TP
.PP
Comments and bug reports concerning
this manual page should be directed to
-.IR chet@po.cwru.edu .
+.IR chet.ramey@case.edu .
.SH BUGS
.PP
It's too big and too slow.
.\" Case Western Reserve University
.\" chet@po.cwru.edu
.\"
-.\" Last Change: Fri Dec 24 16:00:06 EST 2010
+.\" Last Change: Tue Dec 28 13:41:43 EST 2010
.\"
.\" bash_builtins, strip all but Built-Ins section
.if \n(zZ=1 .ig zZ
.if \n(zY=1 .ig zY
-.TH BASH 1 "2010 December 24" "GNU Bash-4.2"
+.TH BASH 1 "2010 December 28" "GNU Bash-4.2"
.\"
.\" There's some problem with having a `@'
.\" in a tagged paragraph with the BSD man macros.
as primaries.
.if t .sp 0.5
.if n .sp 1
-When used with \fB[[\fP, The \fB<\fP and \fB>\fP operators sort
+When used with \fB[[\fP, the \fB<\fP and \fB>\fP operators sort
lexicographically using the current locale.
.if t .sp 0.5
.if n .sp 1
The values assigned to the array members are as follows:
.sp .5
.RS
-.PD 0
.TP 24
.B BASH_VERSINFO[\fR0\fP]
The major version number (the \fIrelease\fP).
The value of
.SM
.BR MACHTYPE .
-.PD
.RE
.TP
.B BASH_VERSION
.if n ".:~:/usr".
.TP
.B COLUMNS
-Used by the \fBselect\fP builtin command to determine the terminal width
+Used by the \fBselect\fP compound command to determine the terminal width
when printing selection lists. Automatically set upon receipt of a
.SM
.BR SIGWINCH .
This variable determines the locale category used for number formatting.
.TP
.B LINES
-Used by the \fBselect\fP builtin command to determine the column length
+Used by the \fBselect\fP compound command to determine the column length
for printing selection lists. Automatically set upon receipt of a
.SM
.BR SIGWINCH .
value \fB$\(aq\enreal\et%3lR\enuser\et%3lU\ensys\t%3lS\(aq\fP.
If the value is null, no timing information is displayed.
A trailing newline is added when the format string is displayed.
+.PD 0
.TP
.B TMOUT
If set to a value greater than zero,
option to specify an indexed array and a
.B \-A
option to specify an associative array.
+If both options are supplied,
+.B \-A
+takes precedence.
The
.B read
builtin accepts a
expanded and that value is used in the rest of the substitution, rather
than the value of \fIparameter\fP itself.
This is known as \fIindirect expansion\fP.
-The exceptions to this are the expansions of ${\fB!\\fPfIprefix\fP\fB*\fP} and
+The exceptions to this are the expansions of ${\fB!\fP\fIprefix\fP\fB*\fP} and
${\fB!\fP\fIname\fP[\fI@\fP]} described below.
The exclamation point must immediately follow the left brace in order to
introduce indirection.
.PP
\fICommand substitution\fP allows the output of a command to replace
the command name. There are two forms:
-.PP
.RS
.PP
\fB$(\fP\fIcommand\fP\|\fB)\fP
the syntax \fB[.\fP\fIsymbol\fP\fB.]\fP matches the collating symbol
\fIsymbol\fP.
.RE
+.RE
.PD
.PP
If the \fBextglob\fP shell option is enabled using the \fBshopt\fP
links and operate on the target of the link, rather than the link itself.
.if t .sp 0.5
.if n .sp 1
-When used with \fB[[\fP, The \fB<\fP and \fB>\fP operators sort
+When used with \fB[[\fP, the \fB<\fP and \fB>\fP operators sort
lexicographically using the current locale.
+The \fBtest\fP command sorts using ASCII ordering.
.sp 1
.PD 0
.TP
.SH COMMAND EXECUTION ENVIRONMENT
The shell has an \fIexecution environment\fP, which consists of the
following:
-.if n .sp 1
.IP \(bu
open files inherited by the shell at invocation, as modified by
redirections supplied to the \fBexec\fP builtin
may not be used to destroy an array variable and \fB+r\fP will not
remove the readonly attribute.
When used in a function, makes each
-\fIname\fP local, as with the
+\fIname\fP local, as with the
.B local
command,
-unless the \fB\-g\P option is supplied,
+unless the \fB\-g\fP option is supplied,
If a variable name is followed by =\fIvalue\fP, the value of
the variable is set to \fIvalue\fP.
The return value is 0 unless an invalid option is encountered,
.B \-s
Display only a short usage synopsis for each \fIpattern\fP
.PD
-.RE
+.PP
The return status is 0 unless no command matches
.IR pattern .
+.RE
.TP
\fBhistory [\fIn\fP]
.PD 0
invalid file descriptor is supplied as the argument to \fB\-u\fP.
.RE
.TP
-\fBreadonly\fP [\fB\-aApf\fP] [\fIname\fP[=\fIword\fP] ...]
+\fBreadonly\fP [\fB\-aAf\fP] [\fB\-p\fP] [\fIname\fP[=\fIword\fP] ...]
.PD
The given
\fInames\fP are marked readonly; the values of these
option restricts the variables to indexed arrays; the
.B \-A
option restricts the variables to associative arrays.
+If both options are supplied,
+.B \-A
+takes precedence.
If no
.I name
arguments are given, or if the
.B \-p
option is supplied, a list of all readonly names is printed.
+The other options may be used to restrict the output to a subset of
+the set of readonly names.
The
.B \-p
option causes output to be displayed in a format that
If set,
.B bash
changes its behavior to that of version 3.1 with respect to quoted
-arguments to the conditional command's \fB=~\fP operator.
+arguments to the \fB[[\fP conditional command's \fB=~\fP operator.
.TP 8
.B compat32
If set,
.B bash
changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the conditional command's \fB<\fP and \fB>\fP
-operators.
+string comparison when using the \fB[[\fP
+conditional command's \fB<\fP and \fB>\fP operators.
+Bash versions prior to bash-4.1 use ASCII collation and
+.IR strcmp (3);
+bash-4.1 and later
+use the current locale's collation sequence and
+.IR strcoll (3).
.TP 8
.B compat40
If set,
.B bash
changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the conditional command's \fB<\fP and \fB>\fP
-operators and the effect of interrupting a command list.
+string comparison when using the \fB[[\fP
+conditional command's \fB<\fP and \fB>\fP operators (see previous item)
+and the effect of interrupting a command list.
.TP 8
.B compat41
-@item compat41
If set,
.BR bash ,
when in posix mode, treats a single quote in a double-quoted
.TP 8
.B globstar
If set, the pattern \fB**\fP used in a pathname expansion context will
-match a files and zero or more directories and subdirectories.
+match all files and zero or more directories and subdirectories.
If the pattern is followed by a \fB/\fP, only directories and
subdirectories match.
.TP 8
If set, the \fBecho\fP builtin expands backslash-escape sequences
by default.
.RE
+.PD
.TP
\fBsuspend\fP [\fB\-f\fP]
Suspend the execution of this shell until it receives a
5 or more arguments
The expression is parsed and evaluated according to precedence
using the rules listed above.
+.if t .sp 0.5
+.if n .sp 1
+.LP
+When used with \fBtest\fP or \fB[\fP, the \fB<\fP and \fB>\fP operators
+sort lexicographically using ASCII ordering.
.RE
.PD
.TP
</HEAD>
<BODY><TABLE WIDTH=100%>
<TR>
-<TH ALIGN=LEFT width=33%>BASH(1)<TH ALIGN=CENTER width=33%>2010 December 6<TH ALIGN=RIGHT width=33%>BASH(1)
+<TH ALIGN=LEFT width=33%>BASH(1)<TH ALIGN=CENTER width=33%>2010 December 28<TH ALIGN=RIGHT width=33%>BASH(1)
</TR>
</TABLE>
<BR><A HREF="#index">Index</A>
<P>
-When used with <B>[[</B>, The <B><</B> and <B>></B> operators sort
+When used with <B>[[</B>, the <B><</B> and <B>></B> operators sort
lexicographically using the current locale.
<P>
command completes. Otherwise, the <B>else</B> <I>list</I> is
executed, if present. The exit status is the exit status of the
last command executed, or zero if no condition tested true.
-<DT><B>while</B> <I>list</I>; <B>do</B> <I>list</I>; <B>done</B><DD>
+<DT><B>while</B> <I>list-1</I>; <B>do</B> <I>list-2</I>; <B>done</B><DD>
-<DT><B>until</B> <I>list</I>; <B>do</B> <I>list</I>; <B>done</B><DD>
+<DT><B>until</B> <I>list-1</I>; <B>do</B> <I>list-2</I>; <B>done</B><DD>
-The <B>while</B> command continuously executes the <B>do</B>
-<I>list</I> as long as the last command in <I>list</I> returns
+The <B>while</B> command continuously executes the list
+<I>list-2</I> as long as the last command in the list <I>list-1</I> returns
an exit status of zero. The <B>until</B> command is identical
to the <B>while</B> command, except that the test is negated;
-the
-<B>do</B>
-
-<I>list</I>
+<I>list-2</I>
is executed as long as the last command in
-<I>list</I>
+<I>list-1</I>
returns a non-zero exit status.
The exit status of the <B>while</B> and <B>until</B> commands
is the exit status
-of the last <B>do</B> <I>list</I> command executed, or zero if
+of the last command executed in <I>list-2</I>, or zero if
none was executed.
</DL>
<A NAME="lbAP"> </A>
<DT><B>COLUMNS</B>
<DD>
-Used by the <B>select</B> builtin command to determine the terminal width
+Used by the <B>select</B> compound command to determine the terminal width
when printing selection lists. Automatically set upon receipt of a
<FONT SIZE=-1><B>SIGWINCH</B>.
<DT><B>LINES</B>
<DD>
-Used by the <B>select</B> builtin command to determine the column length
+Used by the <B>select</B> compound command to determine the column length
for printing selection lists. Automatically set upon receipt of a
<FONT SIZE=-1><B>SIGWINCH</B>.
<P>
+<DL COMPACT><DT><DD>
<DL COMPACT>
<DT><B>*</B>
<I>symbol</I>.
</DL>
+</DL>
+
<P>
<P>
-When used with <B>[[</B>, The <B><</B> and <B>></B> operators sort
+When used with <B>[[</B>, the <B><</B> and <B>></B> operators sort
lexicographically using the current locale.
+The <B>test</B> command sorts using ASCII ordering.
<P>
<DL COMPACT>
<B>bash</B>
changes its behavior to that of version 3.1 with respect to quoted
-arguments to the conditional command's <B>=~</B> operator.
+arguments to the <B>[[</B> conditional command's <B>=~</B> operator.
<DT><B>compat32</B>
<DD>
<B>bash</B>
changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the conditional command's <B><</B> and <B>></B>
-operators.
+string comparison when using the <B>[[</B>
+conditional command's <B><</B> and <B>></B> operators.
+Bash versions prior to bash-4.1 use ASCII collation and
+<I>strcmp</I>(3);
+
+bash-4.1 and later
+use the current locale's collation sequence and
+<I>strcoll</I>(3).
+
<DT><B>compat40</B>
<DD>
<B>bash</B>
changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the conditional command's <B><</B> and <B>></B>
-operators and the effect of interrupting a command list.
+string comparison when using the <B>[[</B>
+conditional command's <B><</B> and <B>></B> operators (see previous item)
+and the effect of interrupting a command list.
<DT><B>compat41</B>
<DD>
<DT>5 or more arguments<DD>
The expression is parsed and evaluated according to precedence
using the rules listed above.
-</DL></DL>
+<P>
+
+
+</DL>
+<P>
+
+When used with <B>test</B> or <B>[</B>, the <B><</B> and <B>></B> operators
+sort lexicographically using ASCII ordering.
+</DL>
<DT><B>times</B>
<HR>
<TABLE WIDTH=100%>
<TR>
-<TH ALIGN=LEFT width=33%>GNU Bash-4.2<TH ALIGN=CENTER width=33%>2010 December 6<TH ALIGN=RIGHT width=33%>BASH(1)
+<TH ALIGN=LEFT width=33%>GNU Bash-4.2<TH ALIGN=CENTER width=33%>2010 December 28<TH ALIGN=RIGHT width=33%>BASH(1)
</TR>
</TABLE>
<HR>
</DL>
<HR>
This document was created by man2html from bash.1.<BR>
-Time: 07 December 2010 16:12:47 EST
+Time: 28 December 2010 14:30:29 EST
</BODY>
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/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
--.35 E/F1 10/Times-Bold@0 SF(Quote Remo)87 84 Q -.1(va)-.1 G(l).1 E F0
-1.112(After the preceding e)108 96 R 1.112
+-.35 E/F1 10/Times-Bold@0 SF(!\()144 84 Q/F2 10/Times-Italic@0 SF
+(pattern-list).833 E F1(\)).833 E F0(Matches an)180 96 Q(ything e)-.15 E
+(xcept one of the gi)-.15 E -.15(ve)-.25 G 2.5(np).15 G(atterns)-2.5 E
+F1(Quote Remo)87 112.8 Q -.1(va)-.1 G(l).1 E F0 1.112
+(After the preceding e)108 124.8 R 1.112
(xpansions, all unquoted occurrences of the characters)-.15 F F1(\\)
3.613 E F0(,)A F1<08>3.613 E F0 3.613(,a)C(nd)-3.613 E F1(")4.446 E F0
-1.113(that did not result)4.446 F(from one of the abo)108 108 Q .3 -.15
-(ve ex)-.15 H(pansions are remo).15 E -.15(ve)-.15 G(d.).15 E/F2 10.95
-/Times-Bold@0 SF(REDIRECTION)72 124.8 Q F0 .545(Before a command is e)
-108 136.8 R -.15(xe)-.15 G .545(cuted, its input and output may be).15 F
-/F3 10/Times-Italic@0 SF -.37(re)3.045 G(dir).37 E(ected)-.37 E F0 .545
-(using a special notation interpreted)3.815 F .616(by the shell.)108
-148.8 R .617(Redirection may also be used to open and close \214les for\
- the current shell e)5.616 F -.15(xe)-.15 G .617(cution en).15 F(viron-)
--.4 E 3.275(ment. The)108 160.8 R(follo)3.275 E .774
-(wing redirection operators may precede or appear an)-.25 F .774
-(ywhere within a)-.15 F F3 .774(simple command)3.614 F F0(or)4.044 E
-(may follo)108 172.8 Q 2.5(wa)-.25 G F3(command)A F0 5(.R).77 G
+1.113(that did not result)4.446 F(from one of the abo)108 136.8 Q .3
+-.15(ve ex)-.15 H(pansions are remo).15 E -.15(ve)-.15 G(d.).15 E/F3
+10.95/Times-Bold@0 SF(REDIRECTION)72 153.6 Q F0 .545
+(Before a command is e)108 165.6 R -.15(xe)-.15 G .545
+(cuted, its input and output may be).15 F F2 -.37(re)3.045 G(dir).37 E
+(ected)-.37 E F0 .545(using a special notation interpreted)3.815 F .616
+(by the shell.)108 177.6 R .617(Redirection may also be used to open an\
+d close \214les for the current shell e)5.616 F -.15(xe)-.15 G .617
+(cution en).15 F(viron-)-.4 E 3.275(ment. The)108 189.6 R(follo)3.275 E
+.774(wing redirection operators may precede or appear an)-.25 F .774
+(ywhere within a)-.15 F F2 .774(simple command)3.614 F F0(or)4.044 E
+(may follo)108 201.6 Q 2.5(wa)-.25 G F2(command)A F0 5(.R).77 G
(edirections are processed in the order the)-5 E 2.5(ya)-.15 G(ppear)
-2.5 E 2.5(,f)-.4 G(rom left to right.)-2.5 E .771(Each redirection tha\
t may be preceded by a \214le descriptor number may instead be preceded\
- by a w)108 189.6 R .772(ord of)-.1 F .293(the form {)108 201.6 R F3
+ by a w)108 218.4 R .772(ord of)-.1 F .293(the form {)108 230.4 R F2
(varname)A F0 2.793(}. In)B .293
(this case, for each redirection operator e)2.793 F .293
-(xcept >&- and <&-, the shell will allocate)-.15 F 3.498<618c>108 213.6
-S .999(le descriptor greater than 10 and assign it to)-3.498 F F3
+(xcept >&- and <&-, the shell will allocate)-.15 F 3.498<618c>108 242.4
+S .999(le descriptor greater than 10 and assign it to)-3.498 F F2
(varname)3.499 E F0 5.999(.I)C 3.499(f>)-5.999 G .999
-(&- or <&- is preceded by {)-3.499 F F3(varname)A F0 .999(}, the)B -.25
-(va)108 225.6 S(lue of).25 E F3(varname)2.5 E F0
+(&- or <&- is preceded by {)-3.499 F F2(varname)A F0 .999(}, the)B -.25
+(va)108 254.4 S(lue of).25 E F2(varname)2.5 E F0
(de\214nes the \214le descriptor to close.)2.5 E .284(In the follo)108
-242.4 R .283(wing descriptions, if the \214le descriptor number is omit\
+271.2 R .283(wing descriptions, if the \214le descriptor number is omit\
ted, and the \214rst character of the redirect-)-.25 F .512
-(ion operator is)108 254.4 R F1(<)3.012 E F0 3.012(,t)C .512
+(ion operator is)108 283.2 R F1(<)3.012 E F0 3.012(,t)C .512
(he redirection refers to the standard input \(\214le descriptor 0\).)
-3.012 F .512(If the \214rst character of the)5.512 F
-(redirection operator is)108 266.4 Q F1(>)2.5 E F0 2.5(,t)C
+(redirection operator is)108 295.2 Q F1(>)2.5 E F0 2.5(,t)C
(he redirection refers to the standard output \(\214le descriptor 1\).)
--2.5 E .825(The w)108 283.2 R .825(ord follo)-.1 F .824
+-2.5 E .825(The w)108 312 R .825(ord follo)-.1 F .824
(wing the redirection operator in the follo)-.25 F .824
(wing descriptions, unless otherwise noted, is sub-)-.25 F .772
-(jected to brace e)108 295.2 R .773(xpansion, tilde e)-.15 F .773
+(jected to brace e)108 324 R .773(xpansion, tilde e)-.15 F .773
(xpansion, parameter e)-.15 F .773
(xpansion, command substitution, arithmetic e)-.15 F(xpan-)-.15 E .844
-(sion, quote remo)108 307.2 R -.25(va)-.15 G .843(l, pathname e).25 F
-.843(xpansion, and w)-.15 F .843(ord splitting.)-.1 F .843(If it e)5.843
-F .843(xpands to more than one w)-.15 F(ord,)-.1 E F1(bash)3.343 E F0
-(reports an error)108 319.2 Q(.)-.55 E
-(Note that the order of redirections is signi\214cant.)108 336 Q -.15
-(Fo)5 G 2.5(re).15 G(xample, the command)-2.65 E(ls)144 352.8 Q F1(>)2.5
+(sion, quote remo)108 336 R -.25(va)-.15 G .843(l, pathname e).25 F .843
+(xpansion, and w)-.15 F .843(ord splitting.)-.1 F .843(If it e)5.843 F
+.843(xpands to more than one w)-.15 F(ord,)-.1 E F1(bash)3.343 E F0
+(reports an error)108 348 Q(.)-.55 E
+(Note that the order of redirections is signi\214cant.)108 364.8 Q -.15
+(Fo)5 G 2.5(re).15 G(xample, the command)-2.65 E(ls)144 381.6 Q F1(>)2.5
E F0(dirlist 2)2.5 E F1(>&)A F0(1)A
-(directs both standard output and standard error to the \214le)108 369.6
-Q F3(dirlist)2.5 E F0 2.5(,w).68 G(hile the command)-2.5 E(ls 2)144
-386.4 Q F1(>&)A F0(1)A F1(>)2.5 E F0(dirlist)2.5 E .527
-(directs only the standard output to \214le)108 403.2 R F3(dirlist)3.027
-E F0 3.027(,b).68 G .527(ecause the standard error w)-3.027 F .527
+(directs both standard output and standard error to the \214le)108 398.4
+Q F2(dirlist)2.5 E F0 2.5(,w).68 G(hile the command)-2.5 E(ls 2)144
+415.2 Q F1(>&)A F0(1)A F1(>)2.5 E F0(dirlist)2.5 E .527
+(directs only the standard output to \214le)108 432 R F2(dirlist)3.027 E
+F0 3.027(,b).68 G .527(ecause the standard error w)-3.027 F .527
(as duplicated from the standard)-.1 F
-(output before the standard output w)108 415.2 Q(as redirected to)-.1 E
-F3(dirlist)2.5 E F0(.).68 E F1(Bash)108 432 Q F0 .599(handles se)3.099 F
+(output before the standard output w)108 444 Q(as redirected to)-.1 E F2
+(dirlist)2.5 E F0(.).68 E F1(Bash)108 460.8 Q F0 .599(handles se)3.099 F
-.15(ve)-.25 G .599(ral \214lenames specially when the).15 F 3.099(ya)
-.15 G .598(re used in redirections, as described in the follo)-3.099 F
-(wing)-.25 E(table:)108 444 Q F1(/de)144 460.8 Q(v/fd/)-.15 E F3(fd)A F0
-(If)180 472.8 Q F3(fd)2.5 E F0(is a v)2.5 E(alid inte)-.25 E(ger)-.15 E
-2.5<2c8c>-.4 G(le descriptor)-2.5 E F3(fd)2.5 E F0(is duplicated.)2.5 E
-F1(/de)144 484.8 Q(v/stdin)-.15 E F0(File descriptor 0 is duplicated.)
-180 496.8 Q F1(/de)144 508.8 Q(v/stdout)-.15 E F0
-(File descriptor 1 is duplicated.)180 520.8 Q F1(/de)144 532.8 Q
-(v/stderr)-.15 E F0(File descriptor 2 is duplicated.)180 544.8 Q F1(/de)
-144 556.8 Q(v/tcp/)-.15 E F3(host)A F1(/)A F3(port)A F0(If)180 568.8 Q
-F3(host)2.996 E F0 .496(is a v)2.996 F .496
-(alid hostname or Internet address, and)-.25 F F3(port)2.997 E F0 .497
+(wing)-.25 E(table:)108 472.8 Q F1(/de)144 489.6 Q(v/fd/)-.15 E F2(fd)A
+F0(If)180 501.6 Q F2(fd)2.5 E F0(is a v)2.5 E(alid inte)-.25 E(ger)-.15
+E 2.5<2c8c>-.4 G(le descriptor)-2.5 E F2(fd)2.5 E F0(is duplicated.)2.5
+E F1(/de)144 513.6 Q(v/stdin)-.15 E F0(File descriptor 0 is duplicated.)
+180 525.6 Q F1(/de)144 537.6 Q(v/stdout)-.15 E F0
+(File descriptor 1 is duplicated.)180 549.6 Q F1(/de)144 561.6 Q
+(v/stderr)-.15 E F0(File descriptor 2 is duplicated.)180 573.6 Q F1(/de)
+144 585.6 Q(v/tcp/)-.15 E F2(host)A F1(/)A F2(port)A F0(If)180 597.6 Q
+F2(host)2.996 E F0 .496(is a v)2.996 F .496
+(alid hostname or Internet address, and)-.25 F F2(port)2.997 E F0 .497
(is an inte)2.997 F .497(ger port number or ser)-.15 F(-)-.2 E
-(vice name,)180 580.8 Q F1(bash)2.5 E F0
+(vice name,)180 609.6 Q F1(bash)2.5 E F0
(attempts to open a TCP connection to the corresponding sock)2.5 E(et.)
--.1 E F1(/de)144 592.8 Q(v/udp/)-.15 E F3(host)A F1(/)A F3(port)A F0(If)
-180 604.8 Q F3(host)2.997 E F0 .497(is a v)2.997 F .497
-(alid hostname or Internet address, and)-.25 F F3(port)2.996 E F0 .496
+-.1 E F1(/de)144 621.6 Q(v/udp/)-.15 E F2(host)A F1(/)A F2(port)A F0(If)
+180 633.6 Q F2(host)2.997 E F0 .497(is a v)2.997 F .497
+(alid hostname or Internet address, and)-.25 F F2(port)2.996 E F0 .496
(is an inte)2.996 F .496(ger port number or ser)-.15 F(-)-.2 E
-(vice name,)180 616.8 Q F1(bash)2.5 E F0
+(vice name,)180 645.6 Q F1(bash)2.5 E F0
(attempts to open a UDP connection to the corresponding sock)2.5 E(et.)
--.1 E 2.5(Af)108 633.6 S
+-.1 E 2.5(Af)108 662.4 S
(ailure to open or create a \214le causes the redirection to f)-2.6 E
(ail.)-.1 E .946(Redirections using \214le descriptors greater than 9 s\
-hould be used with care, as the)108 650.4 R 3.447(ym)-.15 G .947
+hould be used with care, as the)108 679.2 R 3.447(ym)-.15 G .947
(ay con\215ict with \214le)-3.447 F
-(descriptors the shell uses internally)108 662.4 Q(.)-.65 E F1(Redir)87
-679.2 Q(ecting Input)-.18 E F0 .391
-(Redirection of input causes the \214le whose name results from the e)
-108 691.2 R .391(xpansion of)-.15 F F3(wor)3.231 E(d)-.37 E F0 .391
-(to be opened for read-)3.661 F(ing on \214le descriptor)108 703.2 Q F3
-(n)2.5 E F0 2.5(,o).24 G 2.5(rt)-2.5 G
-(he standard input \(\214le descriptor 0\) if)-2.5 E F3(n)2.86 E F0
-(is not speci\214ed.)2.74 E
-(The general format for redirecting input is:)108 720 Q(GNU Bash-4.2)72
-768 Q(2010 December 6)138.465 E(24)188.455 E 0 Cg EP
+(descriptors the shell uses internally)108 691.2 Q(.)-.65 E
+(GNU Bash-4.2)72 768 Q(2010 December 28)135.965 E(24)185.955 E 0 Cg EP
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/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
--.35 E([)144 84 Q/F1 10/Times-Italic@0 SF(n)A F0(])A/F2 10/Times-Bold@0
-SF(<)A F1(wor)A(d)-.37 E F2(Redir)87 100.8 Q(ecting Output)-.18 E F0
-.174
+-.35 E/F1 10/Times-Bold@0 SF(Redir)87 84 Q(ecting Input)-.18 E F0 .391
+(Redirection of input causes the \214le whose name results from the e)
+108 96 R .391(xpansion of)-.15 F/F2 10/Times-Italic@0 SF(wor)3.231 E(d)
+-.37 E F0 .391(to be opened for read-)3.661 F(ing on \214le descriptor)
+108 108 Q F2(n)2.5 E F0 2.5(,o).24 G 2.5(rt)-2.5 G
+(he standard input \(\214le descriptor 0\) if)-2.5 E F2(n)2.86 E F0
+(is not speci\214ed.)2.74 E
+(The general format for redirecting input is:)108 124.8 Q([)144 141.6 Q
+F2(n)A F0(])A F1(<)A F2(wor)A(d)-.37 E F1(Redir)87 158.4 Q
+(ecting Output)-.18 E F0 .174
(Redirection of output causes the \214le whose name results from the e)
-108 112.8 R .175(xpansion of)-.15 F F1(wor)3.015 E(d)-.37 E F0 .175
-(to be opened for writ-)3.445 F .825(ing on \214le descriptor)108 124.8
-R F1(n)3.325 E F0 3.325(,o).24 G 3.325(rt)-3.325 G .824
-(he standard output \(\214le descriptor 1\) if)-3.325 F F1(n)3.684 E F0
+108 170.4 R .175(xpansion of)-.15 F F2(wor)3.015 E(d)-.37 E F0 .175
+(to be opened for writ-)3.445 F .825(ing on \214le descriptor)108 182.4
+R F2(n)3.325 E F0 3.325(,o).24 G 3.325(rt)-3.325 G .824
+(he standard output \(\214le descriptor 1\) if)-3.325 F F2(n)3.684 E F0
.824(is not speci\214ed.)3.564 F .824(If the \214le does not)5.824 F
--.15(ex)108 136.8 S(ist it is created; if it does e).15 E
+-.15(ex)108 194.4 S(ist it is created; if it does e).15 E
(xist it is truncated to zero size.)-.15 E
-(The general format for redirecting output is:)108 153.6 Q([)144 170.4 Q
-F1(n)A F0(])A F2(>)A F1(wor)A(d)-.37 E F0 .154
-(If the redirection operator is)108 187.2 R F2(>)2.654 E F0 2.654(,a)C
-.154(nd the)-2.654 F F2(noclob)2.654 E(ber)-.1 E F0 .154(option to the)
-2.654 F F2(set)2.655 E F0 -.2(bu)2.655 G .155
-(iltin has been enabled, the redirection).2 F .658(will f)108 199.2 R
+(The general format for redirecting output is:)108 211.2 Q([)144 228 Q
+F2(n)A F0(])A F1(>)A F2(wor)A(d)-.37 E F0 .154
+(If the redirection operator is)108 244.8 R F1(>)2.654 E F0 2.654(,a)C
+.154(nd the)-2.654 F F1(noclob)2.654 E(ber)-.1 E F0 .154(option to the)
+2.654 F F1(set)2.655 E F0 -.2(bu)2.655 G .155
+(iltin has been enabled, the redirection).2 F .658(will f)108 256.8 R
.658(ail if the \214le whose name results from the e)-.1 F .658
-(xpansion of)-.15 F F1(wor)3.158 E(d)-.37 E F0 -.15(ex)3.158 G .657
+(xpansion of)-.15 F F2(wor)3.158 E(d)-.37 E F0 -.15(ex)3.158 G .657
(ists and is a re).15 F .657(gular \214le.)-.15 F .657(If the redi-)
-5.657 F .408(rection operator is)108 211.2 R F2(>|)2.909 E F0 2.909(,o)C
-2.909(rt)-2.909 G .409(he redirection operator is)-2.909 F F2(>)2.909 E
-F0 .409(and the)2.909 F F2(noclob)2.909 E(ber)-.1 E F0 .409
-(option to the)2.909 F F2(set)2.909 E F0 -.2(bu)2.909 G .409
+5.657 F .408(rection operator is)108 268.8 R F1(>|)2.909 E F0 2.909(,o)C
+2.909(rt)-2.909 G .409(he redirection operator is)-2.909 F F1(>)2.909 E
+F0 .409(and the)2.909 F F1(noclob)2.909 E(ber)-.1 E F0 .409
+(option to the)2.909 F F1(set)2.909 E F0 -.2(bu)2.909 G .409
(iltin command).2 F(is not enabled, the redirection is attempted e)108
-223.2 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(ft)-2.5 G(he \214le named by)
--2.5 E F1(wor)2.5 E(d)-.37 E F0 -.15(ex)2.5 G(ists.).15 E F2 -.25(Ap)87
-240 S(pending Redir).25 E(ected Output)-.18 E F0 .642
-(Redirection of output in this f)108 252 R .642
+280.8 Q -.15(ve)-.25 G 2.5(ni).15 G 2.5(ft)-2.5 G(he \214le named by)
+-2.5 E F2(wor)2.5 E(d)-.37 E F0 -.15(ex)2.5 G(ists.).15 E F1 -.25(Ap)87
+297.6 S(pending Redir).25 E(ected Output)-.18 E F0 .642
+(Redirection of output in this f)108 309.6 R .642
(ashion causes the \214le whose name results from the e)-.1 F .641
-(xpansion of)-.15 F F1(wor)3.481 E(d)-.37 E F0 .641(to be)3.911 F .473
-(opened for appending on \214le descriptor)108 264 R F1(n)2.973 E F0
+(xpansion of)-.15 F F2(wor)3.481 E(d)-.37 E F0 .641(to be)3.911 F .473
+(opened for appending on \214le descriptor)108 321.6 R F2(n)2.973 E F0
2.974(,o).24 G 2.974(rt)-2.974 G .474
-(he standard output \(\214le descriptor 1\) if)-2.974 F F1(n)3.334 E F0
+(he standard output \(\214le descriptor 1\) if)-2.974 F F2(n)3.334 E F0
.474(is not speci\214ed.)3.214 F(If)5.474 E(the \214le does not e)108
-276 Q(xist it is created.)-.15 E
-(The general format for appending output is:)108 292.8 Q([)144 309.6 Q
-F1(n)A F0(])A F2(>>)A F1(wor)A(d)-.37 E F2(Redir)87 331.2 Q
+333.6 Q(xist it is created.)-.15 E
+(The general format for appending output is:)108 350.4 Q([)144 367.2 Q
+F2(n)A F0(])A F1(>>)A F2(wor)A(d)-.37 E F1(Redir)87 388.8 Q
(ecting Standard Output and Standard Err)-.18 E(or)-.18 E F0 .249
-(This construct allo)108 343.2 R .249(ws both the standard output \(\
+(This construct allo)108 400.8 R .249(ws both the standard output \(\
\214le descriptor 1\) and the standard error output \(\214le descrip-)
-.25 F(tor 2\) to be redirected to the \214le whose name is the e)108
-355.2 Q(xpansion of)-.15 E F1(wor)2.5 E(d)-.37 E F0(.).77 E
-(There are tw)108 372 Q 2.5(of)-.1 G
-(ormats for redirecting standard output and standard error:)-2.5 E F2
-(&>)144 388.8 Q F1(wor)A(d)-.37 E F0(and)108 400.8 Q F2(>&)144 412.8 Q
-F1(wor)A(d)-.37 E F0(Of the tw)108 429.6 Q 2.5(of)-.1 G
+412.8 Q(xpansion of)-.15 E F2(wor)2.5 E(d)-.37 E F0(.).77 E
+(There are tw)108 429.6 Q 2.5(of)-.1 G
+(ormats for redirecting standard output and standard error:)-2.5 E F1
+(&>)144 446.4 Q F2(wor)A(d)-.37 E F0(and)108 458.4 Q F1(>&)144 470.4 Q
+F2(wor)A(d)-.37 E F0(Of the tw)108 487.2 Q 2.5(of)-.1 G
(orms, the \214rst is preferred.)-2.5 E(This is semantically equi)5 E
--.25(va)-.25 G(lent to).25 E F2(>)144 446.4 Q F1(wor)A(d)-.37 E F0(2)2.5
-E F2(>&)A F0(1)A F2 -.25(Ap)87 468 S
+-.25(va)-.25 G(lent to).25 E F1(>)144 504 Q F2(wor)A(d)-.37 E F0(2)2.5 E
+F1(>&)A F0(1)A F1 -.25(Ap)87 525.6 S
(pending Standard Output and Standard Err).25 E(or)-.18 E F0 .248
-(This construct allo)108 480 R .249(ws both the standard output \(\214l\
-e descriptor 1\) and the standard error output \(\214le descrip-)-.25 F
-(tor 2\) to be appended to the \214le whose name is the e)108 492 Q
-(xpansion of)-.15 E F1(wor)2.5 E(d)-.37 E F0(.).77 E
+(This construct allo)108 537.6 R .249(ws both the standard output \(\
+\214le descriptor 1\) and the standard error output \(\214le descrip-)
+-.25 F(tor 2\) to be appended to the \214le whose name is the e)108
+549.6 Q(xpansion of)-.15 E F2(wor)2.5 E(d)-.37 E F0(.).77 E
(The format for appending standard output and standard error is:)108
-508.8 Q F2(&>>)144 525.6 Q F1(wor)A(d)-.37 E F0
-(This is semantically equi)108 542.4 Q -.25(va)-.25 G(lent to).25 E F2
-(>>)144 559.2 Q F1(wor)A(d)-.37 E F0(2)2.5 E F2(>&)A F0(1)A F2(Her)87
-576 Q 2.5(eD)-.18 G(ocuments)-2.5 E F0 .33(This type of redirection ins\
-tructs the shell to read input from the current source until a line con\
-taining only)108 588 R F1(delimiter)108.35 600 Q F0 .614
+566.4 Q F1(&>>)144 583.2 Q F2(wor)A(d)-.37 E F0
+(This is semantically equi)108 600 Q -.25(va)-.25 G(lent to).25 E F1(>>)
+144 616.8 Q F2(wor)A(d)-.37 E F0(2)2.5 E F1(>&)A F0(1)A F1(Her)87 633.6
+Q 2.5(eD)-.18 G(ocuments)-2.5 E F0 .33(This type of redirection instruc\
+ts the shell to read input from the current source until a line contain\
+ing only)108 645.6 R F2(delimiter)108.35 657.6 Q F0 .614
(\(with no trailing blanks\) is seen.)3.844 F .615
(All of the lines read up to that point are then used as the stan-)5.615
-F(dard input for a command.)108 612 Q(The format of here-documents is:)
-108 628.8 Q F2(<<)144 645.6 Q F0([)A F2<ad>A F0(])A F1(wor)A(d)-.37 E
-(her)164 657.6 Q(e-document)-.37 E(delimiter)144 669.6 Q F0 .128
-(No parameter e)108 686.4 R .127
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(ord of a simple command.)-.1 F .394(The shell maintains a list of alia\
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(If so, that w)5.472 F .473(ord is replaced by the te)-.1 F .473
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(SHELL B)2.5 E(UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)-.25
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(The rules concerning the de\214nition and use of aliases are some)108
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(wa)-.1 G .436(ys reads at least).1 F .338
-(one complete line of input before e)108 153.6 R -.15(xe)-.15 G .338
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(cuting an).15 F 2.838(yo)-.15 G 2.838(ft)-2.838 G .338
(he commands on that line.)-2.838 F .337(Aliases are e)5.337 F .337
-(xpanded when)-.15 F 3.403(ac)108 165.6 S .904
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2.777 E .277(vior is also an issue when functions)-.2 F .699(are e)108
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-(because a function de\214nition is itself a compound command.)108 213.6
+(because a function de\214nition is itself a compound command.)108 271.2
R .495(As a consequence, aliases de\214ned in a func-)5.494 F .085
-(tion are not a)108 225.6 R -.25(va)-.2 G .084
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(ilable until after that function is e).25 F -.15(xe)-.15 G 2.584
(cuted. T).15 F 2.584(ob)-.8 G 2.584(es)-2.584 G .084(afe, al)-2.584 F
-.1(wa)-.1 G .084(ys put alias de\214nitions on a sepa-).1 F
-(rate line, and do not use)108 237.6 Q F2(alias)2.5 E F0
-(in compound commands.)2.5 E -.15(Fo)108 254.4 S 2.5(ra).15 G(lmost e)
--2.5 E -.15(ve)-.25 G
-(ry purpose, aliases are superseded by shell functions.).15 E/F3 10.95
-/Times-Bold@0 SF(FUNCTIONS)72 271.2 Q F0 3.467(As)108 283.2 S .967
-(hell function, de\214ned as described abo)-3.467 F 1.267 -.15(ve u)-.15
-H(nder).15 E F1 .967(SHELL GRAMMAR)3.467 F/F4 9/Times-Roman@0 SF(,)A F0
-.968(stores a series of commands for)3.217 F 1.002(later e)108 295.2 R
--.15(xe)-.15 G 3.502(cution. When).15 F 1.002(the name of a shell funct\
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-(mands associated with that function name is e)108 307.2 R -.15(xe)-.15
-G 2.816(cuted. Functions).15 F .316(are e)2.816 F -.15(xe)-.15 G .316
-(cuted in the conte).15 F .316(xt of the current)-.15 F .036
-(shell; no ne)108 319.2 R 2.536(wp)-.25 G .036
+(rate line, and do not use)108 295.2 Q F1(alias)2.5 E F0
+(in compound commands.)2.5 E -.15(Fo)108 312 S 2.5(ra).15 G(lmost e)-2.5
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+.15 E/F4 10.95/Times-Bold@0 SF(FUNCTIONS)72 328.8 Q F0 3.467(As)108
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+/Times-Roman@0 SF(,)A F0 .968(stores a series of commands for)3.217 F
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+(the name of a shell function is used as a simple command name, the lis\
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(rocess is created to interpret them \(contrast this with the e)-2.536 F
-.15(xe)-.15 G .036(cution of a shell script\).).15 F .035(When a)5.035
-F .639(function is e)108 331.2 R -.15(xe)-.15 G .639(cuted, the ar).15 F
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.639
(guments to the function become the positional parameters during its e)
--.18 F -.15(xe)-.15 G(cution.).15 E .533(The special parameter)108 343.2
-R F2(#)3.033 E F0 .532(is updated to re\215ect the change.)3.033 F .532
-(Special parameter)5.532 F F2(0)3.032 E F0 .532(is unchanged.)3.032 F
-.532(The \214rst ele-)5.532 F(ment of the)108 355.2 Q F1(FUNCN)2.5 E
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+(Special parameter)5.532 F F1(0)3.032 E F0 .532(is unchanged.)3.032 F
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(AME)-.18 E F0 -.25(va)2.25 G
(riable is set to the name of the function while the function is e).25 E
-.15(xe)-.15 G(cuting.).15 E 1.25(All other aspects of the shell e)108
-372 R -.15(xe)-.15 G 1.25(cution en).15 F 1.25
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(vironment are identical between a function and its caller with)-.4 F
-1.049(these e)108 384 R 3.548(xceptions: the)-.15 F F1(DEB)3.548 E(UG)
--.09 E F0(and)3.298 E F2(RETURN)3.548 E F0 1.048
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(w\) are not inherited unless the function has been gi)-.25 F -.15(ve)
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2.92 E(e)-.162 E F0 -.2(bu)2.67 G .42(iltin belo).2 F .42(w\) or the)
--.25 F F2 .42(\255o functrace)2.92 F F0 .42
-(shell option has been enabled with the)2.92 F F2(set)2.92 E F0 -.2(bu)
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-(shell option has been enabled.)2.5 E -1.11(Va)108 448.8 S .656
-(riables local to the function may be declared with the)1.11 F F2(local)
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+(riables local to the function may be declared with the)1.11 F F1(local)
3.155 E F0 -.2(bu)3.155 G .655(iltin command.).2 F(Ordinarily)5.655 E
-3.155(,v)-.65 G .655(ariables and)-3.405 F(their v)108 460.8 Q
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(alues are shared between the function and its caller)-.25 E(.)-.55 E
-(The)108 477.6 Q F2(FUNCNEST)3.528 E F0 -.25(va)3.528 G 1.028
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(riable, if set to a numeric v).25 F 1.028
(alue greater than 0, de\214nes a maximum function nesting)-.25 F(le)108
-489.6 Q -.15(ve)-.25 G 2.5(l. Function).15 F(in)2.5 E -.2(vo)-.4 G
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(cations that e).2 E(xceed the limit cause the entire command to abort.)
--.15 E .044(If the b)108 506.4 R .043(uiltin command)-.2 F F2 -.18(re)
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2.543 G(tur).18 E(n)-.15 E F0 .043(is e)2.543 F -.15(xe)-.15 G .043
(cuted in a function, the function completes and e).15 F -.15(xe)-.15 G
-.043(cution resumes with).15 F 1.011(the ne)108 518.4 R 1.011
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(xt command after the function call.)-.15 F(An)6.011 E 3.511(yc)-.15 G
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(When a function completes, the v)5.214 F .213
(alues of the positional parameters and the spe-)-.25 F(cial parameter)
-108 542.4 Q F2(#)2.5 E F0(are restored to the v)2.5 E(alues the)-.25 E
-2.5(yh)-.15 G(ad prior to the function')-2.5 E 2.5(se)-.55 G -.15(xe)
--2.65 G(cution.).15 E 1.358
-(Function names and de\214nitions may be listed with the)108 559.2 R F2
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+(Function names and de\214nitions may be listed with the)108 616.8 R F1
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(will list the function names only \(and optionally the source)3.39 F
-.326(\214le and line number)108 583.2 R 2.826(,i)-.4 G 2.826(ft)-2.826 G
-(he)-2.826 E F2(extdeb)2.826 E(ug)-.2 E F0 .326
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-(xported so that subshells)-.15 F 1.298(automatically ha)108 595.2 R
-1.598 -.15(ve t)-.2 H 1.298(hem de\214ned with the).15 F F
2<ad66>3.798 E
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1<ad66>3.798 E
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(en in cases where this may cause a problem.)-.1 E .371
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-(ls of equal-precedence operators.).15 E(The le)5 E -.15(ve)-.25 G
-(ls are listed in order of decreasing precedence.).15 E/F1 10
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-(riable pre-increment and pre-decrement).25 E F2 2.5<ad2b>108 160.8 S F0
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-(equi)108 532.8 Q -.25(va)-.25 G(lent to).25 E F1 -.63(``)2.5 G(bg %1')
-.63 E(')-.63 E F0(.)A .13(The shell learns immediately whene)108 549.6 R
--.15(ve)-.25 G 2.63(raj).15 G .13(ob changes state.)-2.63 F(Normally)
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-(its until it is about to print a).1 F .158
-(prompt before reporting changes in a job')108 561.6 R 2.658(ss)-.55 G
-.158(tatus so as to not interrupt an)-2.658 F 2.657(yo)-.15 G .157
-(ther output.)-2.657 F .157(If the)5.157 F F1<ad62>2.657 E F0 .157
-(option to)2.657 F(the)108 573.6 Q F1(set)3.951 E F0 -.2(bu)3.951 G
-1.451(iltin command is enabled,).2 F F1(bash)3.951 E F0 1.452
-(reports such changes immediately)3.951 F 6.452(.A)-.65 G 1.752 -.15
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-(exe)108 585.6 S(cuted for each child that e).15 E(xits.)-.15 E .033
-(If an attempt to e)108 602.4 R(xit)-.15 E F1(bash)2.533 E F0 .033
-(is made while jobs are stopped \(or)2.533 F 2.532(,i)-.4 G 2.532(ft)
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-(shell option has been enabled)2.532 F 2.019(using the)108 614.4 R F1
-(shopt)4.519 E F0 -.2(bu)4.519 G 2.019
-(iltin, running\), the shell prints a w).2 F 2.02
-(arning message, and, if the)-.1 F F1(checkjobs)4.52 E F0 2.02
-(option is)4.52 F .459(enabled, lists the jobs and their statuses.)108
-626.4 R(The)5.459 E F1(jobs)2.959 E F0 .458
-(command may then be used to inspect their status.)2.958 F .458(If a)
-5.458 F .603(second attempt to e)108 638.4 R .604
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+(ringing)-2.943 E 1.472(job 1 from the background into the fore)108
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+(%1 &').63 F(')-.63 E F0 1.473(resumes job 1 in the background,)3.973 F
+(equi)108 609.6 Q -.25(va)-.25 G(lent to).25 E F3 -.63(``)2.5 G(bg %1')
+.63 E(')-.63 E F0(.)A .131(The shell learns immediately whene)108 626.4
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+(exe)108 662.4 S(cuted for each child that e).15 E(xits.)-.15 E .032
+(If an attempt to e)108 679.2 R(xit)-.15 E F3(bash)2.532 E F0 .032
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(xit is made without an interv)-.15 F .604
(ening command, the shell does not print another w)-.15 F(arning,)-.1 E
-(and an)108 650.4 Q 2.5(ys)-.15 G(topped jobs are terminated.)-2.5 E/F6
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--.35 E/F1 10/Times-Bold@0 SF(\\a)144 84 Q F0
-(an ASCII bell character \(07\))28.22 E F1(\\d)144 96 Q F0
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(the date in "W)27.66 E(eekday Month Date" format \(e.g., "T)-.8 E
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(\(3\) and the result is inserted into the prompt string; an)B(empty)180
-132 Q F2(format)2.5 E F0
+192 Q F4(format)2.5 E F0
(results in a locale-speci\214c time representation.)2.5 E
-(The braces are required)5 E F1(\\e)144 144 Q F0
-(an ASCII escape character \(033\))28.78 E F1(\\h)144 156 Q F0
-(the hostname up to the \214rst `.)27.66 E(')-.7 E F1(\\H)144 168 Q F0
-(the hostname)25.44 E F1(\\j)144 180 Q F0
-(the number of jobs currently managed by the shell)29.89 E F1(\\l)144
-192 Q F0(the basename of the shell')30.44 E 2.5(st)-.55 G(erminal de)
--2.5 E(vice name)-.25 E F1(\\n)144 204 Q F0(ne)27.66 E(wline)-.25 E F1
-(\\r)144 216 Q F0(carriage return)28.78 E F1(\\s)144 228 Q F0
-(the name of the shell, the basename of)29.33 E F1($0)2.5 E F0
-(\(the portion follo)2.5 E(wing the \214nal slash\))-.25 E F1(\\t)144
-240 Q F0(the current time in 24-hour HH:MM:SS format)29.89 E F1(\\T)144
-252 Q F0(the current time in 12-hour HH:MM:SS format)26.55 E F1(\\@)144
-264 Q F0(the current time in 12-hour am/pm format)23.92 E F1(\\A)144 276
-Q F0(the current time in 24-hour HH:MM format)26 E F1(\\u)144 288 Q F0
-(the username of the current user)27.66 E F1(\\v)144 300 Q F0(the v)
-28.22 E(ersion of)-.15 E F1(bash)2.5 E F0(\(e.g., 2.00\))2.5 E F1(\\V)
-144 312 Q F0(the release of)26 E F1(bash)2.5 E F0 2.5(,v)C
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+(the hostname up to the \214rst `.)27.66 E(')-.7 E F2(\\H)144 228 Q F0
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(ersion + patch le)-2.65 E -.15(ve)-.25 G 2.5(l\().15 G(e.g., 2.00.0\))
--2.5 E F1(\\w)144 324 Q F0 .116(the current w)26 F .116
-(orking directory)-.1 F 2.616(,w)-.65 G(ith)-2.616 E/F3 9/Times-Bold@0
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--.25 F .115(alue of the)-.25 F F3(PR)180 336 Q(OMPT_DIR)-.27 E(TRIM)-.36
-E F0 -.25(va)2.25 G(riable\)).25 E F1(\\W)144 348 Q F0
+-2.5 E F2(\\w)144 384 Q F0 .115(the current w)26 F .115
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+(va)2.25 G(riable\)).25 E F2(\\W)144 408 Q F0
(the basename of the current w)23.22 E(orking directory)-.1 E 2.5(,w)
-.65 G(ith)-2.5 E F3($HOME)2.5 E F0(abbre)2.25 E(viated with a tilde)
--.25 E F1(\\!)144 360 Q F0(the history number of this command)29.89 E F1
-(\\#)144 372 Q F0(the command number of this command)28.22 E F1(\\$)144
-384 Q F0(if the ef)28.22 E(fecti)-.25 E .3 -.15(ve U)-.25 H(ID is 0, a)
-.15 E F1(#)2.5 E F0 2.5(,o)C(therwise a)-2.5 E F1($)2.5 E(\\)144 396 Q
-F2(nnn)A F0(the character corresponding to the octal number)18.22 E F2
-(nnn)2.5 E F1(\\\\)144 408 Q F0 2.5(ab)30.44 G(ackslash)-2.5 E F1(\\[)
-144 420 Q F0(be)29.89 E 1.257(gin a sequence of non-printing characters\
+-.25 E F2(\\!)144 420 Q F0(the history number of this command)29.89 E F2
+(\\#)144 432 Q F0(the command number of this command)28.22 E F2(\\$)144
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+.15 E F2(#)2.5 E F0 2.5(,o)C(therwise a)-2.5 E F2($)2.5 E(\\)144 456 Q
+F4(nnn)A F0(the character corresponding to the octal number)18.22 E F4
+(nnn)2.5 E F2(\\\\)144 468 Q F0 2.5(ab)30.44 G(ackslash)-2.5 E F2(\\[)
+144 480 Q F0(be)29.89 E 1.257(gin a sequence of non-printing characters\
, which could be used to embed a terminal)-.15 F
-(control sequence into the prompt)180 432 Q F1(\\])144 444 Q F0
-(end a sequence of non-printing characters)29.89 E .12
-(The command number and the history number are usually dif)108 460.8 R
-.119(ferent: the history number of a command is its)-.25 F 1.585(positi\
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-(belo)108 484.8 Q .541(w\), while the command number is the position in\
- the sequence of commands e)-.25 F -.15(xe)-.15 G .54
-(cuted during the cur).15 F(-)-.2 E .546(rent shell session.)108 496.8 R
+(control sequence into the prompt)180 492 Q F2(\\])144 504 Q F0
+(end a sequence of non-printing characters)29.89 E .119
+(The command number and the history number are usually dif)108 520.8 R
+.12(ferent: the history number of a command is its)-.25 F 1.585(positio\
+n in the history list, which may include commands restored from the his\
+tory \214le \(see)108 532.8 R F3(HIST)4.084 E(OR)-.162 E(Y)-.315 E F0
+(belo)108 544.8 Q .541(w\), while the command number is the position in\
+ the sequence of commands e)-.25 F -.15(xe)-.15 G .541
+(cuted during the cur).15 F(-)-.2 E .546(rent shell session.)108 556.8 R
.546(After the string is decoded, it is e)5.546 F .546
(xpanded via parameter e)-.15 F .546(xpansion, command substitu-)-.15 F
-.352(tion, arithmetic e)108 508.8 R .352(xpansion, and quote remo)-.15 F
--.25(va)-.15 G .352(l, subject to the v).25 F .352(alue of the)-.25 F F1
-(pr)2.852 E(omptv)-.18 E(ars)-.1 E F0 .351(shell option \(see the)2.852
-F(description of the)108 520.8 Q F1(shopt)2.5 E F0(command under)2.5 E
+.351(tion, arithmetic e)108 568.8 R .352(xpansion, and quote remo)-.15 F
+-.25(va)-.15 G .352(l, subject to the v).25 F .352(alue of the)-.25 F F2
+(pr)2.852 E(omptv)-.18 E(ars)-.1 E F0 .352(shell option \(see the)2.852
+F(description of the)108 580.8 Q F2(shopt)2.5 E F0(command under)2.5 E
F3(SHELL B)2.5 E(UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)
--.25 E/F4 10.95/Times-Bold@0 SF(READLINE)72 537.6 Q F0 .15
+-.25 E F1(READLINE)72 597.6 Q F0 .151
(This is the library that handles reading input when using an interacti)
-108 549.6 R .451 -.15(ve s)-.25 H .151(hell, unless the).15 F F1
-(\255\255noediting)2.651 E F0(option)2.651 E 1.209(is gi)108 561.6 R
--.15(ve)-.25 G 3.709(na).15 G 3.709(ts)-3.709 G 1.209(hell in)-3.709 F
--.2(vo)-.4 G 3.709(cation. Line).2 F 1.208
-(editing is also used when using the)3.709 F F1<ad65>3.708 E F0 1.208
-(option to the)3.708 F F1 -.18(re)3.708 G(ad).18 E F0 -.2(bu)3.708 G
-3.708(iltin. By).2 F(def)108 573.6 Q .851
+108 609.6 R .45 -.15(ve s)-.25 H .15(hell, unless the).15 F F2
+(\255\255noediting)2.65 E F0(option)2.65 E 1.208(is gi)108 621.6 R -.15
+(ve)-.25 G 3.708(na).15 G 3.708(ts)-3.708 G 1.208(hell in)-3.708 F -.2
+(vo)-.4 G 3.708(cation. Line).2 F 1.208
+(editing is also used when using the)3.708 F F2<ad65>3.709 E F0 1.209
+(option to the)3.709 F F2 -.18(re)3.709 G(ad).18 E F0 -.2(bu)3.709 G
+3.709(iltin. By).2 F(def)108 633.6 Q .851
(ault, the line editing commands are similar to those of Emacs.)-.1 F
-3.351(Av)5.851 G .851(i-style line editing interf)-3.351 F .852
-(ace is also)-.1 F -.2(av)108 585.6 S 3.35(ailable. Line)-.05 F .85
+3.351(Av)5.851 G .851(i-style line editing interf)-3.351 F .851
+(ace is also)-.1 F -.2(av)108 645.6 S 3.35(ailable. Line)-.05 F .85
(editing can be enabled at an)3.35 F 3.35(yt)-.15 G .85(ime using the)
--3.35 F F1 .85(\255o emacs)3.35 F F0(or)3.35 E F1 .85(\255o vi)3.35 F F0
-.85(options to the)3.35 F F1(set)3.35 E F0 -.2(bu)3.35 G(iltin).2 E
-(\(see)108 597.6 Q F3 .762(SHELL B)3.262 F(UIL)-.09 E .762(TIN COMMANDS)
--.828 F F0(belo)3.012 E 3.262(w\). T)-.25 F 3.263(ot)-.8 G .763(urn of)
+-3.35 F F2 .85(\255o emacs)3.35 F F0(or)3.35 E F2 .85(\255o vi)3.35 F F0
+.85(options to the)3.35 F F2(set)3.35 E F0 -.2(bu)3.35 G(iltin).2 E
+(\(see)108 657.6 Q F3 .763(SHELL B)3.263 F(UIL)-.09 E .763(TIN COMMANDS)
+-.828 F F0(belo)3.013 E 3.263(w\). T)-.25 F 3.263(ot)-.8 G .763(urn of)
-3.263 F 3.263(fl)-.25 G .763
-(ine editing after the shell is running, use the)-3.263 F F1(+o)3.263 E
-(emacs)108 609.6 Q F0(or)2.5 E F1(+o vi)2.5 E F0(options to the)2.5 E F1
-(set)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E F1(Readline Notation)87 626.4 Q
+(ine editing after the shell is running, use the)-3.263 F F2(+o)3.262 E
+(emacs)108 669.6 Q F0(or)2.5 E F2(+o vi)2.5 E F0(options to the)2.5 E F2
+(set)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E F2(Readline Notation)87 686.4 Q
F0 .463(In this section, the Emacs-style notation is used to denote k)
-108 638.4 R -.15(ey)-.1 G(strok).15 E 2.963(es. Control)-.1 F -.1(ke)
-2.963 G .463(ys are denoted by C\255)-.05 F F2 -.1(ke)C(y)-.2 E F0(,)A
-1.152(e.g., C\255n means Control\255N.)108 650.4 R(Similarly)6.152 E(,)
--.65 E F2(meta)4.032 E F0 -.1(ke)3.913 G 1.153(ys are denoted by M\255)
--.05 F F2 -.1(ke)C(y)-.2 E F0 3.653(,s)C 3.653(oM)-3.653 G 1.153
-(\255x means Meta\255X.)-3.653 F(\(On)6.153 E -.1(ke)108 662.4 S .831
-(yboards without a)-.05 F F2(meta)3.711 E F0 -.1(ke)3.591 G 2.131 -.65
-(y, M)-.05 H<ad>.65 E F2(x)A F0 .831(means ESC)3.331 F F2(x)3.331 E F0
-3.331(,i)C .83(.e., press the Escape k)-3.331 F 1.13 -.15(ey t)-.1 H .83
-(hen the).15 F F2(x)4.1 E F0 -.1(ke)3.86 G 4.63 -.65(y. T)-.05 H .83
-(his mak).65 F(es)-.1 E .599(ESC the)108 674.4 R F2 .599(meta pr)3.099 F
-(e\214x)-.37 E F0 5.599(.T)C .599(he combination M\255C\255)-5.599 F F2
-(x)A F0 .599(means ESC\255Control\255)3.099 F F2(x)A F0 3.099(,o)C 3.099
-(rp)-3.099 G .6(ress the Escape k)-3.099 F .9 -.15(ey t)-.1 H .6
-(hen hold).15 F(the Control k)108 686.4 Q .3 -.15(ey w)-.1 H
-(hile pressing the).15 E F2(x)3.27 E F0 -.1(ke)3.03 G -.65(y.)-.05 G(\))
-.65 E .62(Readline commands may be gi)108 703.2 R -.15(ve)-.25 G 3.119
-(nn).15 G(umeric)-3.119 E F2(ar)3.119 E(guments)-.37 E F0 3.119(,w).27 G
-.619(hich normally act as a repeat count.)-3.119 F(Sometimes,)5.619 E
-(ho)108 715.2 Q(we)-.25 E -.15(ve)-.25 G 1.418 -.4(r, i).15 H 3.118(ti)
-.4 G 3.119(st)-3.118 G .619(he sign of the ar)-3.119 F .619
-(gument that is signi\214cant.)-.18 F -.15(Pa)5.619 G .619(ssing a ne)
-.15 F -.05(ga)-.15 G(ti).05 E .919 -.15(ve a)-.25 H -.18(rg).15 G .619
-(ument to a command that).18 F 2.938(acts in the forw)108 727.2 R 2.938
-(ard direction \(e.g.,)-.1 F F1(kill\255line)5.438 E F0 5.438(\)c)C
-2.938(auses that command to act in a backw)-5.438 F 2.938
-(ard direction.)-.1 F(GNU Bash-4.2)72 768 Q(2010 December 6)138.465 E
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+F1(nnn)A F0(the eight-bit character whose v)18.22 E(alue is the octal v)
+-.25 E(alue)-.25 E F1(nnn)2.5 E F0(\(one to three digits\))2.5 E F2(\\x)
+144 321.6 Q F1(HH)A F0(the eight-bit character whose v)13.78 E
+(alue is the he)-.25 E(xadecimal v)-.15 E(alue)-.25 E F1(HH)2.5 E F0
+(\(one or tw)2.5 E 2.5(oh)-.1 G .3 -.15(ex d)-2.5 H(igits\)).15 E 1.141
+(When entering the te)108 338.4 R 1.141(xt of a macro, single or double\
+ quotes must be used to indicate a macro de\214nition.)-.15 F .09
+(Unquoted te)108 350.4 R .09(xt is assumed to be a function name.)-.15 F
+.089(In the macro body)5.089 F 2.589(,t)-.65 G .089
+(he backslash escapes described abo)-2.589 F -.15(ve)-.15 G(are e)108
+362.4 Q 2.5(xpanded. Backslash)-.15 F(will quote an)2.5 E 2.5(yo)-.15 G
(ther character in the macro te)-2.5 E(xt, including " and \010.)-.15 E
-F1(Bash)108 338.4 Q F0(allo)2.93 E .43(ws the current readline k)-.25 F
-.73 -.15(ey b)-.1 H .429(indings to be displayed or modi\214ed with the)
-.15 F F1(bind)2.929 E F0 -.2(bu)2.929 G .429(iltin command.).2 F .045
-(The editing mode may be switched during interacti)108 350.4 R .345 -.15
-(ve u)-.25 H .046(se by using the).15 F F1<ad6f>2.546 E F0 .046
-(option to the)2.546 F F1(set)2.546 E F0 -.2(bu)2.546 G .046
-(iltin command).2 F(\(see)108 362.4 Q/F3 9/Times-Bold@0 SF(SHELL B)2.5 E
-(UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)-.25 E F1
-(Readline V)87 379.2 Q(ariables)-.92 E F0 .044(Readline has v)108 391.2
-R .043(ariables that can be used to further customize its beha)-.25 F
+F2(Bash)108 379.2 Q F0(allo)2.929 E .429(ws the current readline k)-.25
+F .729 -.15(ey b)-.1 H .429
+(indings to be displayed or modi\214ed with the).15 F F2(bind)2.93 E F0
+-.2(bu)2.93 G .43(iltin command.).2 F .046
+(The editing mode may be switched during interacti)108 391.2 R .346 -.15
+(ve u)-.25 H .046(se by using the).15 F F2<ad6f>2.545 E F0 .045
+(option to the)2.545 F F2(set)2.545 E F0 -.2(bu)2.545 G .045
+(iltin command).2 F(\(see)108 403.2 Q/F4 9/Times-Bold@0 SF(SHELL B)2.5 E
+(UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)-.25 E F2
+(Readline V)87 420 Q(ariables)-.92 E F0 .043(Readline has v)108 432 R
+.043(ariables that can be used to further customize its beha)-.25 F
(vior)-.2 E 5.043(.A)-.55 G -.25(va)-2.5 G .043
-(riable may be set in the).25 F F2(inpu-)2.553 E(tr)108 403.2 Q(c)-.37 E
-F0(\214le with a statement of the form)2.81 E F1(set)144 420 Q F2
+(riable may be set in the).25 F F1(inpu-)2.554 E(tr)108 444 Q(c)-.37 E
+F0(\214le with a statement of the form)2.81 E F2(set)144 460.8 Q F1
(variable\255name value)2.5 E F0 .79(Except where noted, readline v)108
-436.8 R .79(ariables can tak)-.25 F 3.29(et)-.1 G .79(he v)-3.29 F
-(alues)-.25 E F1(On)3.29 E F0(or)3.29 E F1(Off)3.29 E F0 .79
+477.6 R .79(ariables can tak)-.25 F 3.29(et)-.1 G .79(he v)-3.29 F
+(alues)-.25 E F2(On)3.29 E F0(or)3.29 E F2(Off)3.29 E F0 .79
(\(without re)3.29 F -.05(ga)-.15 G .79(rd to case\).).05 F(Unrecog-)
-5.79 E .449(nized v)108 448.8 R .448(ariable names are ignored.)-.25 F
+5.79 E .448(nized v)108 489.6 R .448(ariable names are ignored.)-.25 F
.448(When a v)5.448 F .448(ariable v)-.25 F .448
-(alue is read, empty or null v)-.25 F .448(alues, "on" \(case-insensi-)
--.25 F(ti)108 460.8 Q -.15(ve)-.25 G .467(\), and "1" are equi).15 F
--.25(va)-.25 G .468(lent to).25 F F1(On)2.968 E F0 5.468(.A)C .468
+(alue is read, empty or null v)-.25 F .449(alues, "on" \(case-insensi-)
+-.25 F(ti)108 501.6 Q -.15(ve)-.25 G .468(\), and "1" are equi).15 F
+-.25(va)-.25 G .468(lent to).25 F F2(On)2.968 E F0 5.468(.A)C .468
(ll other v)-5.468 F .468(alues are equi)-.25 F -.25(va)-.25 G .468
-(lent to).25 F F1(Off)2.968 E F0 5.468(.T)C .468(he v)-5.468 F .468
-(ariables and their def)-.25 F(ault)-.1 E -.25(va)108 472.8 S(lues are:)
-.25 E F1(bell\255style \(audible\))108 489.6 Q F0 .011
-(Controls what happens when readline w)144 501.6 R .011
-(ants to ring the terminal bell.)-.1 F .01(If set to)5.01 F F1(none)2.51
-E F0 2.51(,r)C .01(eadline ne)-2.51 F -.15(ve)-.25 G(r).15 E .94
-(rings the bell.)144 513.6 R .94(If set to)5.94 F F1(visible)3.44 E F0
-3.44(,r)C .94(eadline uses a visible bell if one is a)-3.44 F -.25(va)
--.2 G 3.44(ilable. If).25 F .94(set to)3.44 F F1(audible)3.44 E F0(,)A
-(readline attempts to ring the terminal')144 525.6 Q 2.5(sb)-.55 G(ell.)
--2.5 E F1(bind\255tty\255special\255chars \(On\))108 537.6 Q F0 .056
-(If set to)144 549.6 R F1(On)2.556 E F0 2.556(,r)C .056(eadline attempt\
-s to bind the control characters treated specially by the k)-2.556 F
-(ernel')-.1 E 2.555(st)-.55 G(ermi-)-2.555 E(nal dri)144 561.6 Q -.15
+(lent to).25 F F2(Off)2.968 E F0 5.468(.T)C .467(he v)-5.468 F .467
+(ariables and their def)-.25 F(ault)-.1 E -.25(va)108 513.6 S(lues are:)
+.25 E F2(bell\255style \(audible\))108 530.4 Q F0 .01
+(Controls what happens when readline w)144 542.4 R .011
+(ants to ring the terminal bell.)-.1 F .011(If set to)5.011 F F2(none)
+2.511 E F0 2.511(,r)C .011(eadline ne)-2.511 F -.15(ve)-.25 G(r).15 E
+.94(rings the bell.)144 554.4 R .94(If set to)5.94 F F2(visible)3.44 E
+F0 3.44(,r)C .94(eadline uses a visible bell if one is a)-3.44 F -.25
+(va)-.2 G 3.44(ilable. If).25 F .94(set to)3.44 F F2(audible)3.44 E F0
+(,)A(readline attempts to ring the terminal')144 566.4 Q 2.5(sb)-.55 G
+(ell.)-2.5 E F2(bind\255tty\255special\255chars \(On\))108 578.4 Q F0
+.055(If set to)144 590.4 R F2(On)2.555 E F0 2.555(,r)C .056(eadline att\
+empts to bind the control characters treated specially by the k)-2.555 F
+(ernel')-.1 E 2.556(st)-.55 G(ermi-)-2.556 E(nal dri)144 602.4 Q -.15
(ve)-.25 G 2.5(rt).15 G 2.5(ot)-2.5 G(heir readline equi)-2.5 E -.25(va)
--.25 G(lents.).25 E F1(comment\255begin \(`)108 573.6 Q(`#')-.63 E('\))
--.63 E F0 .884(The string that is inserted when the readline)144 585.6 R
-F1(insert\255comment)3.385 E F0 .885(command is e)3.385 F -.15(xe)-.15 G
-3.385(cuted. This).15 F(com-)3.385 E(mand is bound to)144 597.6 Q F1
-(M\255#)2.5 E F0(in emacs mode and to)2.5 E F1(#)2.5 E F0
-(in vi command mode.)2.5 E F1(completion\255ignor)108 609.6 Q
-(e\255case \(Off\))-.18 E F0(If set to)144 621.6 Q F1(On)2.5 E F0 2.5
+-.25 G(lents.).25 E F2(comment\255begin \(`)108 614.4 Q(`#')-.63 E('\))
+-.63 E F0 .885(The string that is inserted when the readline)144 626.4 R
+F2(insert\255comment)3.385 E F0 .884(command is e)3.384 F -.15(xe)-.15 G
+3.384(cuted. This).15 F(com-)3.384 E(mand is bound to)144 638.4 Q F2
+(M\255#)2.5 E F0(in emacs mode and to)2.5 E F2(#)2.5 E F0
+(in vi command mode.)2.5 E F2(completion\255ignor)108 650.4 Q
+(e\255case \(Off\))-.18 E F0(If set to)144 662.4 Q F2(On)2.5 E F0 2.5
(,r)C(eadline performs \214lename matching and completion in a case\255\
-insensiti)-2.5 E .3 -.15(ve f)-.25 H(ashion.).05 E F1(completion\255pr)
-108 633.6 Q(e\214x\255display\255length \(0\))-.18 E F0 .829(The length\
+insensiti)-2.5 E .3 -.15(ve f)-.25 H(ashion.).05 E F2(completion\255pr)
+108 674.4 Q(e\214x\255display\255length \(0\))-.18 E F0 .829(The length\
in characters of the common pre\214x of a list of possible completions\
- that is displayed)144 645.6 R 1.274(without modi\214cation.)144 657.6 R
-1.274(When set to a v)6.274 F 1.274
-(alue greater than zero, common pre\214x)-.25 F 1.275
-(es longer than this)-.15 F -.25(va)144 669.6 S(lue are replaced with a\
-n ellipsis when displaying possible completions.).25 E F1
-(completion\255query\255items \(100\))108 681.6 Q F0 .53
-(This determines when the user is queried about vie)144 693.6 R .529
-(wing the number of possible completions gen-)-.25 F .56(erated by the)
-144 705.6 R F1(possible\255completions)3.06 E F0 3.06(command. It)3.06 F
-.561(may be set to an)3.061 F 3.061(yi)-.15 G(nte)-3.061 E .561(ger v)
--.15 F .561(alue greater than or)-.25 F .783(equal to zero.)144 717.6 R
-.783(If the number of possible completions is greater than or equal to \
-the v)5.783 F .782(alue of this)-.25 F -.25(va)144 729.6 S .237
-(riable, the user is ask).25 F .237(ed whether or not he wishes to vie)
--.1 F 2.737(wt)-.25 G .237(hem; otherwise the)-2.737 F 2.737(ya)-.15 G
-.237(re simply listed)-2.737 F(GNU Bash-4.2)72 768 Q(2010 December 6)
-138.465 E(36)188.455 E 0 Cg EP
+ that is displayed)144 686.4 R 1.275(without modi\214cation.)144 698.4 R
+1.275(When set to a v)6.275 F 1.274
+(alue greater than zero, common pre\214x)-.25 F 1.274
+(es longer than this)-.15 F -.25(va)144 710.4 S(lue are replaced with a\
+n ellipsis when displaying possible completions.).25 E(GNU Bash-4.2)72
+768 Q(2010 December 28)135.965 E(36)185.955 E 0 Cg EP
%%Page: 37 37
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%%EndPageSetup
/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
--.35 E(on the terminal.)144 84 Q/F1 10/Times-Bold@0 SF(con)108 96 Q -.1
-(ve)-.4 G(rt\255meta \(On\)).1 E F0 .613(If set to)144 108 R F1(On)3.113
-E F0 3.113(,r)C .613(eadline will con)-3.113 F -.15(ve)-.4 G .613
-(rt characters with the eighth bit set to an ASCII k).15 F .912 -.15
-(ey s)-.1 H .612(equence by).15 F .541
+-.35 E/F1 10/Times-Bold@0 SF(completion\255query\255items \(100\))108 84
+Q F0 .529(This determines when the user is queried about vie)144 96 R
+.53(wing the number of possible completions gen-)-.25 F .561
+(erated by the)144 108 R F1(possible\255completions)3.061 E F0 3.061
+(command. It)3.061 F .561(may be set to an)3.061 F 3.06(yi)-.15 G(nte)
+-3.06 E .56(ger v)-.15 F .56(alue greater than or)-.25 F .782
+(equal to zero.)144 120 R .783(If the number of possible completions is\
+ greater than or equal to the v)5.782 F .783(alue of this)-.25 F -.25
+(va)144 132 S .237(riable, the user is ask).25 F .237
+(ed whether or not he wishes to vie)-.1 F 2.737(wt)-.25 G .237
+(hem; otherwise the)-2.737 F 2.737(ya)-.15 G .237(re simply listed)
+-2.737 F(on the terminal.)144 144 Q F1(con)108 156 Q -.1(ve)-.4 G
+(rt\255meta \(On\)).1 E F0 .612(If set to)144 168 R F1(On)3.112 E F0
+3.112(,r)C .613(eadline will con)-3.112 F -.15(ve)-.4 G .613
+(rt characters with the eighth bit set to an ASCII k).15 F .913 -.15
+(ey s)-.1 H .613(equence by).15 F .541
(stripping the eighth bit and pre\214xing an escape character \(in ef)
-144 120 R .541(fect, using escape as the)-.25 F/F2 10/Times-Italic@0 SF
-.542(meta pr)3.042 F(e-)-.37 E<8c78>144 132 Q F0(\).)A F1
-(disable\255completion \(Off\))108 144 Q F0 .038(If set to)144 156 R F1
+144 180 R .541(fect, using escape as the)-.25 F/F2 10/Times-Italic@0 SF
+.541(meta pr)3.041 F(e-)-.37 E<8c78>144 192 Q F0(\).)A F1
+(disable\255completion \(Off\))108 204 Q F0 .038(If set to)144 216 R F1
(On)2.538 E F0 2.538(,r)C .038(eadline will inhibit w)-2.538 F .038
(ord completion.)-.1 F .038
(Completion characters will be inserted into the)5.038 F(line as if the)
-144 168 Q 2.5(yh)-.15 G(ad been mapped to)-2.5 E F1(self-insert)2.5 E F0
-(.)A F1(editing\255mode \(emacs\))108 180 Q F0 .141
-(Controls whether readline be)144 192 R .141(gins with a set of k)-.15 F
-.441 -.15(ey b)-.1 H .141(indings similar to).15 F F2(Emacs)2.642 E F0
-(or)2.642 E F2(vi)2.642 E F0(.)A F1(editing\255mode)5.142 E F0
-(can be set to either)144 204 Q F1(emacs)2.5 E F0(or)2.5 E F1(vi)2.5 E
-F0(.)A F1(echo\255contr)108 216 Q(ol\255characters \(On\))-.18 E F0
-1.211(When set to)144 228 R F1(On)3.711 E F0 3.711(,o)C 3.711(no)-3.711
-G 1.211(perating systems that indicate the)-3.711 F 3.711(ys)-.15 G 1.21
+144 228 Q 2.5(yh)-.15 G(ad been mapped to)-2.5 E F1(self-insert)2.5 E F0
+(.)A F1(editing\255mode \(emacs\))108 240 Q F0 .142
+(Controls whether readline be)144 252 R .141(gins with a set of k)-.15 F
+.441 -.15(ey b)-.1 H .141(indings similar to).15 F F2(Emacs)2.641 E F0
+(or)2.641 E F2(vi)2.641 E F0(.)A F1(editing\255mode)5.141 E F0
+(can be set to either)144 264 Q F1(emacs)2.5 E F0(or)2.5 E F1(vi)2.5 E
+F0(.)A F1(echo\255contr)108 276 Q(ol\255characters \(On\))-.18 E F0 1.21
+(When set to)144 288 R F1(On)3.71 E F0 3.71(,o)C 3.71(no)-3.71 G 1.211
+(perating systems that indicate the)-3.71 F 3.711(ys)-.15 G 1.211
(upport it, readline echoes a character)-3.711 F
-(corresponding to a signal generated from the k)144 240 Q -.15(ey)-.1 G
-(board.).15 E F1(enable\255k)108 252 Q(eypad \(Off\))-.1 E F0 .892
-(When set to)144 264 R F1(On)3.393 E F0 3.393(,r)C .893
+(corresponding to a signal generated from the k)144 300 Q -.15(ey)-.1 G
+(board.).15 E F1(enable\255k)108 312 Q(eypad \(Off\))-.1 E F0 .893
+(When set to)144 324 R F1(On)3.393 E F0 3.393(,r)C .893
(eadline will try to enable the application k)-3.393 F -.15(ey)-.1 G
-.893(pad when it is called.).15 F .893(Some sys-)5.893 F
-(tems need this to enable the arro)144 276 Q 2.5(wk)-.25 G -.15(ey)-2.6
-G(s.).15 E F1(enable\255meta\255k)108 288 Q(ey \(On\))-.1 E F0 .64
-(When set to)144 300 R F1(On)3.14 E F0 3.14(,r)C .64
+.893(pad when it is called.).15 F .892(Some sys-)5.893 F
+(tems need this to enable the arro)144 336 Q 2.5(wk)-.25 G -.15(ey)-2.6
+G(s.).15 E F1(enable\255meta\255k)108 348 Q(ey \(On\))-.1 E F0 .64
+(When set to)144 360 R F1(On)3.14 E F0 3.14(,r)C .64
(eadline will try to enable an)-3.14 F 3.14(ym)-.15 G .64
(eta modi\214er k)-3.14 F .94 -.15(ey t)-.1 H .64
-(he terminal claims to support).15 F(when it is called.)144 312 Q
+(he terminal claims to support).15 F(when it is called.)144 372 Q
(On man)5 E 2.5(yt)-.15 G(erminals, the meta k)-2.5 E .3 -.15(ey i)-.1 H
2.5(su).15 G(sed to send eight-bit characters.)-2.5 E F1
-(expand\255tilde \(Off\))108 324 Q F0(If set to)144 336 Q F1(On)2.5 E F0
+(expand\255tilde \(Off\))108 384 Q F0(If set to)144 396 Q F1(On)2.5 E F0
2.5(,t)C(ilde e)-2.5 E(xpansion is performed when readline attempts w)
--.15 E(ord completion.)-.1 E F1(history\255pr)108 348 Q(eser)-.18 E -.1
-(ve)-.1 G(\255point \(Off\)).1 E F0 1.338(If set to)144 360 R F1(On)
-3.838 E F0 3.838(,t)C 1.338(he history code attempts to place point at \
-the same location on each history line)-3.838 F(retrie)144 372 Q -.15
+-.15 E(ord completion.)-.1 E F1(history\255pr)108 408 Q(eser)-.18 E -.1
+(ve)-.1 G(\255point \(Off\)).1 E F0 1.339(If set to)144 420 R F1(On)
+3.839 E F0 3.839(,t)C 1.338(he history code attempts to place point at \
+the same location on each history line)-3.839 F(retrie)144 432 Q -.15
(ve)-.25 G 2.5(dw).15 G(ith)-2.5 E F1(pr)2.5 E -.15(ev)-.18 G
(ious-history).15 E F0(or)2.5 E F1(next-history)2.5 E F0(.)A F1
-(history\255size \(0\))108 384 Q F0 .463
-(Set the maximum number of history entries sa)144 396 R -.15(ve)-.2 G
-2.963(di).15 G 2.963(nt)-2.963 G .463(he history list.)-2.963 F .462
+(history\255size \(0\))108 444 Q F0 .462
+(Set the maximum number of history entries sa)144 456 R -.15(ve)-.2 G
+2.963(di).15 G 2.963(nt)-2.963 G .463(he history list.)-2.963 F .463
(If set to zero, the number of)5.463 F
-(entries in the history list is not limited.)144 408 Q F1
-(horizontal\255scr)108 420 Q(oll\255mode \(Off\))-.18 E F0 .448
-(When set to)144 432 R F1(On)2.948 E F0 2.948(,m)C(ak)-2.948 E .448
-(es readline use a single line for display)-.1 F 2.948(,s)-.65 G .449
+(entries in the history list is not limited.)144 468 Q F1
+(horizontal\255scr)108 480 Q(oll\255mode \(Off\))-.18 E F0 .449
+(When set to)144 492 R F1(On)2.949 E F0 2.949(,m)C(ak)-2.949 E .448
+(es readline use a single line for display)-.1 F 2.948(,s)-.65 G .448
(crolling the input horizontally on a)-2.948 F 1.194(single screen line\
when it becomes longer than the screen width rather than wrapping to a\
- ne)144 444 R(w)-.25 E(line.)144 456 Q F1(input\255meta \(Off\))108 468
-Q F0 .227(If set to)144 480 R F1(On)2.727 E F0 2.727(,r)C .228(eadline \
+ ne)144 504 R(w)-.25 E(line.)144 516 Q F1(input\255meta \(Off\))108 528
+Q F0 .228(If set to)144 540 R F1(On)2.728 E F0 2.728(,r)C .227(eadline \
will enable eight-bit input \(that is, it will not strip the high bit f\
-rom the char)-2.727 F(-)-.2 E .957(acters it reads\), re)144 492 R -.05
+rom the char)-2.728 F(-)-.2 E .956(acters it reads\), re)144 552 R -.05
(ga)-.15 G .956(rdless of what the terminal claims it can support.).05 F
-.956(The name)5.956 F F1(meta\255\215ag)3.456 E F0 .956(is a)3.456 F
-(synon)144 504 Q(ym for this v)-.15 E(ariable.)-.25 E F1(isear)108 516 Q
+.957(The name)5.956 F F1(meta\255\215ag)3.457 E F0 .957(is a)3.457 F
+(synon)144 564 Q(ym for this v)-.15 E(ariable.)-.25 E F1(isear)108 576 Q
(ch\255terminators \(`)-.18 E(`C\255[C\255J')-.63 E('\))-.63 E F0 .439(\
The string of characters that should terminate an incremental search wi\
-thout subsequently e)144 528 R -.15(xe)-.15 G(cut-).15 E .935
-(ing the character as a command.)144 540 R .935(If this v)5.935 F .935
-(ariable has not been gi)-.25 F -.15(ve)-.25 G 3.434(nav).15 G .934
-(alue, the characters)-3.684 F F2(ESC)3.434 E F0(and)144 552 Q F2
+thout subsequently e)144 588 R -.15(xe)-.15 G(cut-).15 E .934
+(ing the character as a command.)144 600 R .935(If this v)5.935 F .935
+(ariable has not been gi)-.25 F -.15(ve)-.25 G 3.435(nav).15 G .935
+(alue, the characters)-3.685 F F2(ESC)3.435 E F0(and)144 612 Q F2
(C\255J)2.5 E F0(will terminate an incremental search.)2.5 E F1 -.1(ke)
-108 564 S(ymap \(emacs\)).1 E F0 2.02(Set the current readline k)144 576
-R -.15(ey)-.1 G 4.521(map. The).15 F 2.021(set of v)4.521 F 2.021
-(alid k)-.25 F -.15(ey)-.1 G 2.021(map names is).15 F F2 2.021
-(emacs, emacs\255standar)4.521 F(d,)-.37 E .069
-(emacs\255meta, emacs\255ctlx, vi, vi\255command)144 588 R F0 2.568(,a)C
+108 624 S(ymap \(emacs\)).1 E F0 2.021(Set the current readline k)144
+636 R -.15(ey)-.1 G 4.521(map. The).15 F 2.021(set of v)4.521 F 2.021
+(alid k)-.25 F -.15(ey)-.1 G 2.021(map names is).15 F F2 2.02
+(emacs, emacs\255standar)4.52 F(d,)-.37 E .068
+(emacs\255meta, emacs\255ctlx, vi, vi\255command)144 648 R F0 2.568(,a)C
(nd)-2.568 E F2(vi\255insert)2.568 E F0(.).68 E F2(vi)5.068 E F0 .068
(is equi)2.568 F -.25(va)-.25 G .068(lent to).25 F F2(vi\255command)
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-(ord, or if between w)-.1 F .728(ords, to the end of the ne)-.1 F .728
-(xt w)-.15 F(ord.)-.1 E -.8(Wo)144 508.8 S
+(backward\255w)2.5 E(ord)-.1 E F0(.)A F1(shell\255kill\255w)108 532.8 Q
+(ord \(M\255d\))-.1 E F0 .728
+(Kill from point to the end of the current w)144 544.8 R .729
+(ord, or if between w)-.1 F .729(ords, to the end of the ne)-.1 F .729
+(xt w)-.15 F(ord.)-.1 E -.8(Wo)144 556.8 S
(rd boundaries are the same as those used by).8 E F1(shell\255f)2.5 E
(orward\255w)-.25 E(ord)-.1 E F0(.)A F1(shell\255backward\255kill\255w)
-108 520.8 Q(ord \(M\255Rubout\))-.1 E F0 3.025(Kill the w)144 532.8 R
+108 568.8 Q(ord \(M\255Rubout\))-.1 E F0 3.025(Kill the w)144 580.8 R
3.025(ord behind point.)-.1 F -.8(Wo)8.025 G 3.025
(rd boundaries are the same as those used by).8 F F1(shell\255back-)
-5.525 E(ward\255w)144 544.8 Q(ord)-.1 E F0(.)A F1(unix\255w)108 556.8 Q
-(ord\255rubout \(C\255w\))-.1 E F0 .365(Kill the w)144 568.8 R .365
-(ord behind point, using white space as a w)-.1 F .364(ord boundary)-.1
-F 5.364(.T)-.65 G .364(he killed te)-5.364 F .364(xt is sa)-.15 F -.15
-(ve)-.2 G 2.864(do).15 G 2.864(nt)-2.864 G(he)-2.864 E(kill-ring.)144
-580.8 Q F1(unix\255\214lename\255rubout)108 592.8 Q F0 .166(Kill the w)
-144 604.8 R .166
+5.525 E(ward\255w)144 592.8 Q(ord)-.1 E F0(.)A F1(unix\255w)108 604.8 Q
+(ord\255rubout \(C\255w\))-.1 E F0 .364(Kill the w)144 616.8 R .364
+(ord behind point, using white space as a w)-.1 F .365(ord boundary)-.1
+F 5.365(.T)-.65 G .365(he killed te)-5.365 F .365(xt is sa)-.15 F -.15
+(ve)-.2 G 2.865(do).15 G 2.865(nt)-2.865 G(he)-2.865 E(kill-ring.)144
+628.8 Q F1(unix\255\214lename\255rubout)108 640.8 Q F0 .167(Kill the w)
+144 652.8 R .166
(ord behind point, using white space and the slash character as the w)
--.1 F .167(ord boundaries.)-.1 F(The)5.167 E(killed te)144 616.8 Q
+-.1 F .166(ord boundaries.)-.1 F(The)5.166 E(killed te)144 664.8 Q
(xt is sa)-.15 E -.15(ve)-.2 G 2.5(do).15 G 2.5(nt)-2.5 G(he kill-ring.)
--2.5 E F1(delete\255horizontal\255space \(M\255\\\))108 628.8 Q F0
-(Delete all spaces and tabs around point.)144 640.8 Q F1(kill\255r)108
-652.8 Q(egion)-.18 E F0(Kill the te)144 664.8 Q(xt in the current re)
--.15 E(gion.)-.15 E F1(copy\255r)108 676.8 Q(egion\255as\255kill)-.18 E
-F0(Cop)144 688.8 Q 2.5(yt)-.1 G(he te)-2.5 E(xt in the re)-.15 E
-(gion to the kill b)-.15 E(uf)-.2 E(fer)-.25 E(.)-.55 E F1
-(copy\255backward\255w)108 700.8 Q(ord)-.1 E F0(Cop)144 712.8 Q 4.801
-(yt)-.1 G 2.301(he w)-4.801 F 2.301(ord before point to the kill b)-.1 F
-(uf)-.2 E(fer)-.25 E 7.301(.T)-.55 G 2.301(he w)-7.301 F 2.3
-(ord boundaries are the same as)-.1 F F1(back-)4.8 E(ward\255w)144 724.8
-Q(ord)-.1 E F0(.)A(GNU Bash-4.2)72 768 Q(2010 December 6)138.465 E(42)
-188.455 E 0 Cg EP
+-2.5 E F1(delete\255horizontal\255space \(M\255\\\))108 676.8 Q F0
+(Delete all spaces and tabs around point.)144 688.8 Q F1(kill\255r)108
+700.8 Q(egion)-.18 E F0(Kill the te)144 712.8 Q(xt in the current re)
+-.15 E(gion.)-.15 E(GNU Bash-4.2)72 768 Q(2010 December 28)135.965 E(42)
+185.955 E 0 Cg EP
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/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
--.35 E/F1 10/Times-Bold@0 SF(copy\255f)108 84 Q(orward\255w)-.25 E(ord)
--.1 E F0(Cop)144 96 Q 4.507(yt)-.1 G 2.007(he w)-4.507 F 2.007
-(ord follo)-.1 F 2.007(wing point to the kill b)-.25 F(uf)-.2 E(fer)-.25
-E 7.008(.T)-.55 G 2.008(he w)-7.008 F 2.008
-(ord boundaries are the same as)-.1 F F1 -.25(fo)4.508 G -.37(r-).25 G
-(ward\255w)144 108 Q(ord)-.1 E F0(.)A F1(yank \(C\255y\))108 120 Q F0 -1
-(Ya)144 132 S(nk the top of the kill ring into the b)1 E(uf)-.2 E
-(fer at point.)-.25 E F1(yank\255pop \(M\255y\))108 144 Q F0
-(Rotate the kill ring, and yank the ne)144 156 Q 2.5(wt)-.25 G 2.5
+-.35 E/F1 10/Times-Bold@0 SF(copy\255r)108 84 Q(egion\255as\255kill)-.18
+E F0(Cop)144 96 Q 2.5(yt)-.1 G(he te)-2.5 E(xt in the re)-.15 E
+(gion to the kill b)-.15 E(uf)-.2 E(fer)-.25 E(.)-.55 E F1
+(copy\255backward\255w)108 108 Q(ord)-.1 E F0(Cop)144 120 Q 4.8(yt)-.1 G
+2.3(he w)-4.8 F 2.3(ord before point to the kill b)-.1 F(uf)-.2 E(fer)
+-.25 E 7.301(.T)-.55 G 2.301(he w)-7.301 F 2.301
+(ord boundaries are the same as)-.1 F F1(back-)4.801 E(ward\255w)144 132
+Q(ord)-.1 E F0(.)A F1(copy\255f)108 144 Q(orward\255w)-.25 E(ord)-.1 E
+F0(Cop)144 156 Q 4.508(yt)-.1 G 2.008(he w)-4.508 F 2.008(ord follo)-.1
+F 2.008(wing point to the kill b)-.25 F(uf)-.2 E(fer)-.25 E 7.007(.T)
+-.55 G 2.007(he w)-7.007 F 2.007(ord boundaries are the same as)-.1 F F1
+-.25(fo)4.507 G -.37(r-).25 G(ward\255w)144 168 Q(ord)-.1 E F0(.)A F1
+(yank \(C\255y\))108 180 Q F0 -1(Ya)144 192 S
+(nk the top of the kill ring into the b)1 E(uf)-.2 E(fer at point.)-.25
+E F1(yank\255pop \(M\255y\))108 204 Q F0
+(Rotate the kill ring, and yank the ne)144 216 Q 2.5(wt)-.25 G 2.5
(op. Only)-2.5 F -.1(wo)2.5 G(rks follo).1 E(wing)-.25 E F1(yank)2.5 E
-F0(or)2.5 E F1(yank\255pop)2.5 E F0(.)A F1(Numeric Ar)87 172.8 Q
-(guments)-.1 E(digit\255ar)108 184.8 Q
-(gument \(M\2550, M\2551, ..., M\255\255\))-.1 E F0 .642
-(Add this digit to the ar)144 196.8 R .641
+F0(or)2.5 E F1(yank\255pop)2.5 E F0(.)A F1(Numeric Ar)87 232.8 Q
+(guments)-.1 E(digit\255ar)108 244.8 Q
+(gument \(M\2550, M\2551, ..., M\255\255\))-.1 E F0 .641
+(Add this digit to the ar)144 256.8 R .641
(gument already accumulating, or start a ne)-.18 F 3.141(wa)-.25 G -.18
-(rg)-3.141 G 3.141(ument. M\255\255).18 F .641(starts a ne)3.141 F(g-)
--.15 E(ati)144 208.8 Q .3 -.15(ve a)-.25 H -.18(rg).15 G(ument.).18 E F1
-(uni)108 220.8 Q -.1(ve)-.1 G(rsal\255ar).1 E(gument)-.1 E F0 .778
-(This is another w)144 232.8 R .779(ay to specify an ar)-.1 F 3.279
-(gument. If)-.18 F .779(this command is follo)3.279 F .779
+(rg)-3.141 G 3.142(ument. M\255\255).18 F .642(starts a ne)3.142 F(g-)
+-.15 E(ati)144 268.8 Q .3 -.15(ve a)-.25 H -.18(rg).15 G(ument.).18 E F1
+(uni)108 280.8 Q -.1(ve)-.1 G(rsal\255ar).1 E(gument)-.1 E F0 .779
+(This is another w)144 292.8 R .779(ay to specify an ar)-.1 F 3.279
+(gument. If)-.18 F .779(this command is follo)3.279 F .778
(wed by one or more digits,)-.25 F 1.376
(optionally with a leading minus sign, those digits de\214ne the ar)144
-244.8 R 3.876(gument. If)-.18 F 1.376(the command is fol-)3.876 F(lo)144
-256.8 Q 1.17(wed by digits, e)-.25 F -.15(xe)-.15 G(cuting).15 E F1(uni)
+304.8 R 3.876(gument. If)-.18 F 1.376(the command is fol-)3.876 F(lo)144
+316.8 Q 1.17(wed by digits, e)-.25 F -.15(xe)-.15 G(cuting).15 E F1(uni)
3.67 E -.1(ve)-.1 G(rsal\255ar).1 E(gument)-.1 E F0(ag)3.67 E 1.17
(ain ends the numeric ar)-.05 F 1.17(gument, b)-.18 F 1.17(ut is other)
--.2 F(-)-.2 E .899(wise ignored.)144 268.8 R .898
-(As a special case, if this command is immediately follo)5.899 F .898
+-.2 F(-)-.2 E .898(wise ignored.)144 328.8 R .898
+(As a special case, if this command is immediately follo)5.898 F .898
(wed by a character that is)-.25 F .243
-(neither a digit or minus sign, the ar)144 280.8 R .243
+(neither a digit or minus sign, the ar)144 340.8 R .243
(gument count for the ne)-.18 F .243(xt command is multiplied by four)
--.15 F 5.243(.T)-.55 G(he)-5.243 E(ar)144 292.8 Q .378
+-.15 F 5.242(.T)-.55 G(he)-5.242 E(ar)144 352.8 Q .378
(gument count is initially one, so e)-.18 F -.15(xe)-.15 G .378
(cuting this function the \214rst time mak).15 F .378(es the ar)-.1 F
-.378(gument count)-.18 F(four)144 304.8 Q 2.5(,as)-.4 G(econd time mak)
+.378(gument count)-.18 F(four)144 364.8 Q 2.5(,as)-.4 G(econd time mak)
-2.5 E(es the ar)-.1 E(gument count sixteen, and so on.)-.18 E F1
-(Completing)87 321.6 Q(complete \(T)108 333.6 Q(AB\))-.9 E F0 1.137
-(Attempt to perform completion on the te)144 345.6 R 1.137
+(Completing)87 381.6 Q(complete \(T)108 393.6 Q(AB\))-.9 E F0 1.137
+(Attempt to perform completion on the te)144 405.6 R 1.137
(xt before point.)-.15 F F1(Bash)6.137 E F0 1.137
-(attempts completion treating the)3.637 F(te)144 357.6 Q .533(xt as a v)
--.15 F .533(ariable \(if the te)-.25 F .533(xt be)-.15 F .533(gins with)
--.15 F F1($)3.033 E F0 .533(\), username \(if the te)B .532(xt be)-.15 F
-.532(gins with)-.15 F F1(~)3.032 E F0 .532(\), hostname \(if the)B(te)
-144 369.6 Q .701(xt be)-.15 F .701(gins with)-.15 F F1(@)3.201 E F0 .701
-(\), or command \(including aliases and functions\) in turn.)B .702
+(attempts completion treating the)3.637 F(te)144 417.6 Q .532(xt as a v)
+-.15 F .532(ariable \(if the te)-.25 F .532(xt be)-.15 F .533(gins with)
+-.15 F F1($)3.033 E F0 .533(\), username \(if the te)B .533(xt be)-.15 F
+.533(gins with)-.15 F F1(~)3.033 E F0 .533(\), hostname \(if the)B(te)
+144 429.6 Q .702(xt be)-.15 F .702(gins with)-.15 F F1(@)3.202 E F0 .701
+(\), or command \(including aliases and functions\) in turn.)B .701
(If none of these pro-)5.701 F
-(duces a match, \214lename completion is attempted.)144 381.6 Q F1
-(possible\255completions \(M\255?\))108 393.6 Q F0
-(List the possible completions of the te)144 405.6 Q(xt before point.)
--.15 E F1(insert\255completions \(M\255*\))108 417.6 Q F0 .783
-(Insert all completions of the te)144 429.6 R .783
+(duces a match, \214lename completion is attempted.)144 441.6 Q F1
+(possible\255completions \(M\255?\))108 453.6 Q F0
+(List the possible completions of the te)144 465.6 Q(xt before point.)
+-.15 E F1(insert\255completions \(M\255*\))108 477.6 Q F0 .783
+(Insert all completions of the te)144 489.6 R .783
(xt before point that w)-.15 F .783(ould ha)-.1 F 1.083 -.15(ve b)-.2 H
-.783(een generated by).15 F F1(possible\255com-)3.282 E(pletions)144
-441.6 Q F0(.)A F1(menu\255complete)108 453.6 Q F0 .928(Similar to)144
-465.6 R F1(complete)3.428 E F0 3.428(,b)C .929(ut replaces the w)-3.628
+.783(een generated by).15 F F1(possible\255com-)3.283 E(pletions)144
+501.6 Q F0(.)A F1(menu\255complete)108 513.6 Q F0 .929(Similar to)144
+525.6 R F1(complete)3.429 E F0 3.429(,b)C .929(ut replaces the w)-3.629
F .929(ord to be completed with a single match from the list of)-.1 F
-1.194(possible completions.)144 477.6 R 1.194(Repeated e)6.194 F -.15
-(xe)-.15 G 1.194(cution of).15 F F1(menu\255complete)3.694 E F0 1.193
-(steps through the list of possible)3.694 F .828
-(completions, inserting each match in turn.)144 489.6 R .828
+1.193(possible completions.)144 537.6 R 1.193(Repeated e)6.193 F -.15
+(xe)-.15 G 1.193(cution of).15 F F1(menu\255complete)3.694 E F0 1.194
+(steps through the list of possible)3.694 F .829
+(completions, inserting each match in turn.)144 549.6 R .828
(At the end of the list of completions, the bell is rung)5.828 F .727
-(\(subject to the setting of)144 501.6 R F1(bell\255style)3.227 E F0
+(\(subject to the setting of)144 561.6 R F1(bell\255style)3.227 E F0
3.227(\)a)C .727(nd the original te)-3.227 F .727(xt is restored.)-.15 F
.727(An ar)5.727 F .727(gument of)-.18 F/F2 10/Times-Italic@0 SF(n)3.227
-E F0(mo)3.227 E -.15(ve)-.15 G(s).15 E F2(n)3.227 E F0 1.73
-(positions forw)144 513.6 R 1.73(ard in the list of matches; a ne)-.1 F
+E F0(mo)3.227 E -.15(ve)-.15 G(s).15 E F2(n)3.228 E F0 1.73
+(positions forw)144 573.6 R 1.73(ard in the list of matches; a ne)-.1 F
-.05(ga)-.15 G(ti).05 E 2.03 -.15(ve a)-.25 H -.18(rg).15 G 1.73
(ument may be used to mo).18 F 2.03 -.15(ve b)-.15 H(ackw).15 E(ard)-.1
-E(through the list.)144 525.6 Q(This command is intended to be bound to)
+E(through the list.)144 585.6 Q(This command is intended to be bound to)
5 E F1 -.9(TA)2.5 G(B).9 E F0 2.5(,b)C(ut is unbound by def)-2.7 E
-(ault.)-.1 E F1(menu\255complete\255backward)108 537.6 Q F0 .82
-(Identical to)144 549.6 R F1(menu\255complete)3.32 E F0 3.32(,b)C .82
+(ault.)-.1 E F1(menu\255complete\255backward)108 597.6 Q F0 .82
+(Identical to)144 609.6 R F1(menu\255complete)3.32 E F0 3.32(,b)C .82
(ut mo)-3.52 F -.15(ve)-.15 G 3.32(sb).15 G(ackw)-3.32 E .82
(ard through the list of possible completions, as if)-.1 F F1
-(menu\255complete)144 561.6 Q F0(had been gi)2.5 E -.15(ve)-.25 G 2.5
+(menu\255complete)144 621.6 Q F0(had been gi)2.5 E -.15(ve)-.25 G 2.5
(nan).15 G -2.25 -.15(eg a)-2.5 H(ti).15 E .3 -.15(ve a)-.25 H -.18(rg)
.15 G 2.5(ument. This).18 F(command is unbound by def)2.5 E(ault.)-.1 E
-F1(delete\255char\255or\255list)108 573.6 Q F0 .234
-(Deletes the character under the cursor if not at the be)144 585.6 R
+F1(delete\255char\255or\255list)108 633.6 Q F0 .234
+(Deletes the character under the cursor if not at the be)144 645.6 R
.234(ginning or end of the line \(lik)-.15 F(e)-.1 E F1(delete\255char)
-2.735 E F0(\).)A .425(If at the end of the line, beha)144 597.6 R -.15
+2.734 E F0(\).)A .425(If at the end of the line, beha)144 657.6 R -.15
(ve)-.2 G 2.925(si).15 G .425(dentically to)-2.925 F F1
(possible\255completions)2.925 E F0 5.425(.T)C .425
-(his command is unbound)-5.425 F(by def)144 609.6 Q(ault.)-.1 E F1
-(complete\255\214lename \(M\255/\))108 621.6 Q F0
-(Attempt \214lename completion on the te)144 633.6 Q(xt before point.)
--.15 E F1(possible\255\214lename\255completions \(C\255x /\))108 645.6 Q
-F0(List the possible completions of the te)144 657.6 Q
-(xt before point, treating it as a \214lename.)-.15 E F1
-(complete\255user)108 669.6 Q(name \(M\255~\))-.15 E F0
-(Attempt completion on the te)144 681.6 Q
-(xt before point, treating it as a username.)-.15 E F1(possible\255user)
-108 693.6 Q(name\255completions \(C\255x ~\))-.15 E F0
-(List the possible completions of the te)144 705.6 Q
-(xt before point, treating it as a username.)-.15 E(GNU Bash-4.2)72 768
-Q(2010 December 6)138.465 E(43)188.455 E 0 Cg EP
+(his command is unbound)-5.425 F(by def)144 669.6 Q(ault.)-.1 E F1
+(complete\255\214lename \(M\255/\))108 681.6 Q F0
+(Attempt \214lename completion on the te)144 693.6 Q(xt before point.)
+-.15 E F1(possible\255\214lename\255completions \(C\255x /\))108 705.6 Q
+F0(List the possible completions of the te)144 717.6 Q
+(xt before point, treating it as a \214lename.)-.15 E(GNU Bash-4.2)72
+768 Q(2010 December 28)135.965 E(43)185.955 E 0 Cg EP
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/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
--.35 E/F1 10/Times-Bold@0 SF(complete\255v)108 84 Q(ariable \(M\255$\))
--.1 E F0(Attempt completion on the te)144 96 Q
-(xt before point, treating it as a shell v)-.15 E(ariable.)-.25 E F1
-(possible\255v)108 108 Q(ariable\255completions \(C\255x $\))-.1 E F0
+-.35 E/F1 10/Times-Bold@0 SF(complete\255user)108 84 Q(name \(M\255~\))
+-.15 E F0(Attempt completion on the te)144 96 Q
+(xt before point, treating it as a username.)-.15 E F1(possible\255user)
+108 108 Q(name\255completions \(C\255x ~\))-.15 E F0
(List the possible completions of the te)144 120 Q
+(xt before point, treating it as a username.)-.15 E F1(complete\255v)108
+132 Q(ariable \(M\255$\))-.1 E F0(Attempt completion on the te)144 144 Q
(xt before point, treating it as a shell v)-.15 E(ariable.)-.25 E F1
-(complete\255hostname \(M\255@\))108 132 Q F0
-(Attempt completion on the te)144 144 Q
-(xt before point, treating it as a hostname.)-.15 E F1
-(possible\255hostname\255completions \(C\255x @\))108 156 Q F0
+(possible\255v)108 156 Q(ariable\255completions \(C\255x $\))-.1 E F0
(List the possible completions of the te)144 168 Q
+(xt before point, treating it as a shell v)-.15 E(ariable.)-.25 E F1
+(complete\255hostname \(M\255@\))108 180 Q F0
+(Attempt completion on the te)144 192 Q
+(xt before point, treating it as a hostname.)-.15 E F1
+(possible\255hostname\255completions \(C\255x @\))108 204 Q F0
+(List the possible completions of the te)144 216 Q
(xt before point, treating it as a hostname.)-.15 E F1
-(complete\255command \(M\255!\))108 180 Q F0 .58
-(Attempt completion on the te)144 192 R .581
-(xt before point, treating it as a command name.)-.15 F .581
-(Command comple-)5.581 F .715(tion attempts to match the te)144 204 R
+(complete\255command \(M\255!\))108 228 Q F0 .581
+(Attempt completion on the te)144 240 R .581
+(xt before point, treating it as a command name.)-.15 F .58
+(Command comple-)5.58 F .715(tion attempts to match the te)144 252 R
.715(xt ag)-.15 F .715(ainst aliases, reserv)-.05 F .715(ed w)-.15 F
.715(ords, shell functions, shell b)-.1 F .715(uiltins, and)-.2 F
-(\214nally e)144 216 Q -.15(xe)-.15 G
+(\214nally e)144 264 Q -.15(xe)-.15 G
(cutable \214lenames, in that order).15 E(.)-.55 E F1
-(possible\255command\255completions \(C\255x !\))108 228 Q F0
-(List the possible completions of the te)144 240 Q
+(possible\255command\255completions \(C\255x !\))108 276 Q F0
+(List the possible completions of the te)144 288 Q
(xt before point, treating it as a command name.)-.15 E F1
-(dynamic\255complete\255history \(M\255T)108 252 Q(AB\))-.9 E F0 .424
-(Attempt completion on the te)144 264 R .425
-(xt before point, comparing the te)-.15 F .425(xt ag)-.15 F .425
+(dynamic\255complete\255history \(M\255T)108 300 Q(AB\))-.9 E F0 .425
+(Attempt completion on the te)144 312 R .425
+(xt before point, comparing the te)-.15 F .425(xt ag)-.15 F .424
(ainst lines from the history list)-.05 F
-(for possible completion matches.)144 276 Q F1(dab)108 288 Q(br)-.1 E
--.15(ev)-.18 G(\255expand).15 E F0 .611
-(Attempt menu completion on the te)144 300 R .611
-(xt before point, comparing the te)-.15 F .61(xt ag)-.15 F .61
+(for possible completion matches.)144 324 Q F1(dab)108 336 Q(br)-.1 E
+-.15(ev)-.18 G(\255expand).15 E F0 .61
+(Attempt menu completion on the te)144 348 R .611
+(xt before point, comparing the te)-.15 F .611(xt ag)-.15 F .611
(ainst lines from the his-)-.05 F
-(tory list for possible completion matches.)144 312 Q F1
-(complete\255into\255braces \(M\255{\))108 324 Q F0 .4(Perform \214lena\
+(tory list for possible completion matches.)144 360 Q F1
+(complete\255into\255braces \(M\255{\))108 372 Q F0 .4(Perform \214lena\
me completion and insert the list of possible completions enclosed with\
-in braces so)144 336 R(the list is a)144 348 Q -.25(va)-.2 G
+in braces so)144 384 R(the list is a)144 396 Q -.25(va)-.2 G
(ilable to the shell \(see).25 E F1(Brace Expansion)2.5 E F0(abo)2.5 E
--.15(ve)-.15 G(\).).15 E F1 -.25(Ke)87 364.8 S(yboard Macr).25 E(os)-.18
-E(start\255kbd\255macr)108 376.8 Q 2.5(o\()-.18 G(C\255x \()-2.5 E(\))
-.833 E F0(Be)144 388.8 Q(gin sa)-.15 E
+-.15(ve)-.15 G(\).).15 E F1 -.25(Ke)87 412.8 S(yboard Macr).25 E(os)-.18
+E(start\255kbd\255macr)108 424.8 Q 2.5(o\()-.18 G(C\255x \()-2.5 E(\))
+.833 E F0(Be)144 436.8 Q(gin sa)-.15 E
(ving the characters typed into the current k)-.2 E -.15(ey)-.1 G
-(board macro.).15 E F1(end\255kbd\255macr)108 400.8 Q 2.5(o\()-.18 G
-(C\255x \))-2.5 E(\)).833 E F0(Stop sa)144 412.8 Q
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(ving the characters typed into the current k)-.2 E -.15(ey)-.1 G
(board macro and store the de\214nition.).15 E F1
-(call\255last\255kbd\255macr)108 424.8 Q 2.5(o\()-.18 G(C\255x e\))-2.5
-E F0(Re-e)144 436.8 Q -.15(xe)-.15 G 1(cute the last k).15 F -.15(ey)-.1
-G .999(board macro de\214ned, by making the characters in the macro app\
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-
(Miscellaneous)87 465.6 Q -.18(re)108 477.6 S<ad72>.18 E
-(ead\255init\255\214le \(C\255x C\255r\))-.18 E F0 1.776
-(Read in the contents of the)144 489.6 R/F2 10/Times-Italic@0 SF(inputr)
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--.15 G 1.777(indings or v)-4.277 F 1.777(ariable assignments)-.25 F
-(found there.)144 501.6 Q F1(abort \(C\255g\))108 513.6 Q F0 3.249
-(Abort the current editing command and ring the terminal')144 525.6 R
-5.748(sb)-.55 G 3.248(ell \(subject to the setting of)-5.748 F F1
-(bell\255style)144 537.6 Q F0(\).)A F1(do\255upper)108 549.6 Q
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+E F0(Re-e)144 484.8 Q -.15(xe)-.15 G .999(cute the last k).15 F -.15(ey)
+-.1 G .999(board macro de\214ned, by making the characters in the macro\
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+
E F1(Miscellaneous)87 513.6 Q -.18(re)108 525.6 S<ad72>.18 E
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(case\255v)-.18 E(ersion \(M\255a, M\255b, M\255)-.1 E F2(x)A F1 2.5(,.)
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(wercase, run the command that is bound to the corresponding)-.25 F
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(xt character typed.)-.15 E/F3 9/Times-Bold@0 SF(ESC)5 E F1(f)2.25 E F0
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-(Incremental undo, separately remembered for each line.)144 621.6 Q F1
--2.29 -.18(re v)108 633.6 T(ert\255line \(M\255r\)).08 E F0 1.095
-(Undo all changes made to this line.)144 645.6 R 1.095(This is lik)6.095
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F 3.595(ee)-.1 G -.15(xe)-3.745 G 1.095(cuting the).15 F F1(undo)3.595 E
F0 1.095(command enough times to)3.595 F
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/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
--.35 E/F1 10/Times-Bold@0 SF
-(exchange\255point\255and\255mark \(C\255x C\255x\))108 84 Q F0(Sw)144
-96 Q .282(ap the point with the mark.)-.1 F .283
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+(Perform tilde e)144 96 Q(xpansion on the current w)-.15 E(ord.)-.1 E F1
+(set\255mark \(C\255@, M\255<space>\))108 108 Q F0
+(Set the mark to the point.)144 120 Q(If a numeric ar)5 E
+(gument is supplied, the mark is set to that position.)-.18 E F1
+(exchange\255point\255and\255mark \(C\255x C\255x\))108 132 Q F0(Sw)144
+144 Q .283(ap the point with the mark.)-.1 F .283
(The current cursor position is set to the sa)5.283 F -.15(ve)-.2 G
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-144 108 Q -.15(ve)-.2 G 2.5(da).15 G 2.5(st)-2.5 G(he mark.)-2.5 E F1
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-.536(haracter is read and point is mo)-3.036 F -.15(ve)-.15 G 3.035(dt)
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-(xt occurrence of that character)-.15 F 5.535(.A)-.55 G(ne)-2.5 E -.05
-(ga)-.15 G(ti).05 E .835 -.15(ve c)-.25 H(ount).15 E(searches for pre)
-144 144 Q(vious occurrences.)-.25 E F1(character\255sear)108 156 Q
-(ch\255backward \(M\255C\255]\))-.18 E F0 3.543(Ac)144 168 S 1.043
-(haracter is read and point is mo)-3.543 F -.15(ve)-.15 G 3.544(dt).15 G
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+(ga)-.15 G(ti).05 E .836 -.15(ve c)-.25 H(ount).15 E(searches for pre)
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3.544(ot)-3.544 G 1.044(he pre)-3.544 F 1.044
-(vious occurrence of that character)-.25 F 6.044(.A)-.55 G(ne)-2.5 E
+(vious occurrence of that character)-.25 F 6.043(.A)-.55 G(ne)-2.5 E
-.05(ga)-.15 G(ti).05 E -.15(ve)-.25 G
-(count searches for subsequent occurrences.)144 180 Q F1
-(skip\255csi\255sequence)108 192 Q F0 1.827
-(Read enough characters to consume a multi-k)144 204 R 2.126 -.15(ey s)
--.1 H 1.826(equence such as those de\214ned for k).15 F -.15(ey)-.1 G
-4.326(sl).15 G(ik)-4.326 E(e)-.1 E .79(Home and End.)144 216 R .791
-(Such sequences be)5.79 F .791
+(count searches for subsequent occurrences.)144 228 Q F1
+(skip\255csi\255sequence)108 240 Q F0 1.826
+(Read enough characters to consume a multi-k)144 252 R 2.126 -.15(ey s)
+-.1 H 1.827(equence such as those de\214ned for k).15 F -.15(ey)-.1 G
+4.327(sl).15 G(ik)-4.327 E(e)-.1 E .791(Home and End.)144 264 R .791
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(gin with a Control Sequence Indicator \(CSI\), usually ESC\255[.)-.15 F
-.332(If this sequence is bound to "\\[", k)144 228 R -.15(ey)-.1 G 2.831
-(sp).15 G .331(roducing such sequences will ha)-2.831 F .631 -.15(ve n)
--.2 H 2.831(oe).15 G -.25(ff)-2.831 G .331(ect unless e).25 F(xplic-)
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-.15 E .026(itly bound to a readline command, instead of inserting stra\
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--.55 G(his)-5.026 E(is unbound by def)144 252 Q(ault, b)-.1 E
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-264 Q F0 -.4(Wi)144 276 S .481(thout a numeric ar).4 F .481
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-(comment\255begin)2.981 E F0 -.25(va)2.981 G .48
-(riable is inserted at the).25 F(be)144 288 Q .097
-(ginning of the current line.)-.15 F .098(If a numeric ar)5.097 F .098
-(gument is supplied, this command acts as a toggle:)-.18 F(if)5.098 E
-.322(the characters at the be)144 300 R .321
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+(gument is supplied, this command acts as a toggle:)-.18 F(if)5.097 E
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(ginning of the line do not match the v)-.15 F .321(alue of)-.25 F F1
-(comment\255begin)2.821 E F0 2.821(,t)C .321(he v)-2.821 F .321(alue is)
--.25 F .831(inserted, otherwise the characters in)144 312 R F1
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-(ginning of the line.)-.15 F 1.469
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-(wline had been typed.)-.25 F 1.468(The def)6.468 F 1.468(ault v)-.1 F
-1.468(alue of)-.25 F F1(com-)3.968 E(ment\255begin)144 336 Q F0 .839
-(causes this command to mak)3.339 F 3.339(et)-.1 G .839
-(he current line a shell comment.)-3.339 F .84(If a numeric ar)5.84 F
-(gu-)-.18 E(ment causes the comment character to be remo)144 348 Q -.15
+(comment\255begin)2.821 E F0 2.822(,t)C .322(he v)-2.822 F .322(alue is)
+-.25 F .832(inserted, otherwise the characters in)144 360 R F1
+(comment\255begin)3.332 E F0 .831(are deleted from the be)3.332 F .831
+(ginning of the line.)-.15 F 1.468
+(In either case, the line is accepted as if a ne)144 372 R 1.468
+(wline had been typed.)-.25 F 1.469(The def)6.469 F 1.469(ault v)-.1 F
+1.469(alue of)-.25 F F1(com-)3.969 E(ment\255begin)144 384 Q F0 .84
+(causes this command to mak)3.34 F 3.339(et)-.1 G .839
+(he current line a shell comment.)-3.339 F .839(If a numeric ar)5.839 F
+(gu-)-.18 E(ment causes the comment character to be remo)144 396 Q -.15
(ve)-.15 G(d, the line will be e).15 E -.15(xe)-.15 G
-(cuted by the shell.).15 E F1(glob\255complete\255w)108 360 Q
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-(ord before point is treated as a pattern for pathname e)-.1 F .791
-(xpansion, with an asterisk implicitly)-.15 F 2.5(appended. This)144 384
+(cuted by the shell.).15 E F1(glob\255complete\255w)108 408 Q
+(ord \(M\255g\))-.1 E F0 .791(The w)144 420 R .791
+(ord before point is treated as a pattern for pathname e)-.1 F .792
+(xpansion, with an asterisk implicitly)-.15 F 2.5(appended. This)144 432
R(pattern is used to generate a list of matching \214le names for possi\
-ble completions.)2.5 E F1(glob\255expand\255w)108 396 Q
-(ord \(C\255x *\))-.1 E F0 .371(The w)144 408 R .372
-(ord before point is treated as a pattern for pathname e)-.1 F .372
+ble completions.)2.5 E F1(glob\255expand\255w)108 444 Q
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+(ord before point is treated as a pattern for pathname e)-.1 F .371
(xpansion, and the list of matching \214le)-.15 F .516
-(names is inserted, replacing the w)144 420 R 3.016(ord. If)-.1 F 3.016
+(names is inserted, replacing the w)144 468 R 3.016(ord. If)-.1 F 3.016
(an)3.016 G .516(umeric ar)-3.016 F .516
(gument is supplied, an asterisk is appended)-.18 F(before pathname e)
-144 432 Q(xpansion.)-.15 E F1(glob\255list\255expansions \(C\255x g\))
-108 444 Q F0 .923(The list of e)144 456 R .923(xpansions that w)-.15 F
+144 480 Q(xpansion.)-.15 E F1(glob\255list\255expansions \(C\255x g\))
+108 492 Q F0 .923(The list of e)144 504 R .923(xpansions that w)-.15 F
.923(ould ha)-.1 F 1.223 -.15(ve b)-.2 H .923(een generated by).15 F F1
(glob\255expand\255w)3.423 E(ord)-.1 E F0 .923(is displayed, and)3.423 F
-.872(the line is redra)144 468 R 3.372(wn. If)-.15 F 3.372(an)3.372 G
+.872(the line is redra)144 516 R 3.372(wn. If)-.15 F 3.372(an)3.372 G
.872(umeric ar)-3.372 F .872
(gument is supplied, an asterisk is appended before pathname)-.18 F -.15
-(ex)144 480 S(pansion.).15 E F1(dump\255functions)108 492 Q F0 .626
-(Print all of the functions and their k)144 504 R .926 -.15(ey b)-.1 H
-.627(indings to the readline output stream.).15 F .627(If a numeric ar)
-5.627 F(gu-)-.18 E
-(ment is supplied, the output is formatted in such a w)144 516 Q
+(ex)144 528 S(pansion.).15 E F1(dump\255functions)108 540 Q F0 .627
+(Print all of the functions and their k)144 552 R .927 -.15(ey b)-.1 H
+.626(indings to the readline output stream.).15 F .626(If a numeric ar)
+5.626 F(gu-)-.18 E
+(ment is supplied, the output is formatted in such a w)144 564 Q
(ay that it can be made part of an)-.1 E/F2 10/Times-Italic@0 SF(inputr)
-2.5 E(c)-.37 E F0(\214le.)2.5 E F1(dump\255v)108 528 Q(ariables)-.1 E F0
-1.8(Print all of the settable readline v)144 540 R 1.799
-(ariables and their v)-.25 F 1.799(alues to the readline output stream.)
--.25 F 1.799(If a)6.799 F .304(numeric ar)144 552 R .304
+2.5 E(c)-.37 E F0(\214le.)2.5 E F1(dump\255v)108 576 Q(ariables)-.1 E F0
+1.799(Print all of the settable readline v)144 588 R 1.799
+(ariables and their v)-.25 F 1.8(alues to the readline output stream.)
+-.25 F 1.8(If a)6.8 F .305(numeric ar)144 600 R .304
(gument is supplied, the output is formatted in such a w)-.18 F .304
-(ay that it can be made part of an)-.1 F F2(inputr)144 564 Q(c)-.37 E F0
-(\214le.)2.5 E F1(dump\255macr)108 576 Q(os)-.18 E F0 .593
-(Print all of the readline k)144 588 R .893 -.15(ey s)-.1 H .592
-(equences bound to macros and the strings the).15 F 3.092(yo)-.15 G
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+(ay that it can be made part of an)-.1 F F2(inputr)144 612 Q(c)-.37 E F0
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-(ay that it can be made part of an)-.1 F F2(inputr)3.028 E(c)-.37 E F0
-(\214le.)144 612 Q F1(display\255shell\255v)108 624 Q
-(ersion \(C\255x C\255v\))-.1 E F0(Display v)144 636 Q
+(ay that it can be made part of an)-.1 F F2(inputr)3.027 E(c)-.37 E F0
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+F0(.)A F1(Pr)87 700.8 Q(ogrammable Completion)-.18 E F0 .146(When w)108
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(gument to a command for which a completion speci\214cation \(a)-.18 F
-F2(compspec)108 676.8 Q F0 3.828(\)h)C 1.329
-(as been de\214ned using the)-3.828 F F1(complete)3.829 E F0 -.2(bu)
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-(First, the command name is identi\214ed.)108 705.6 R .498
-(If the command w)5.498 F .497
-(ord is the empty string \(completion attempted at)-.1 F .233(the be)108
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/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
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--.15 G .299(ompspec de\214ned with the)-2.799 F/F1 10/Times-Bold@0 SF
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-(completion as described abo)2.5 E .3 -.15(ve u)-.15 H(nder).15 E F1
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-(First, the actions speci\214ed by the compspec are used.)108 165.6 R
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-.464(ord being)-.1 F .596(completed are returned.)108 177.6 R .596
-(When the)5.596 F F1<ad66>3.096 E F0(or)3.095 E F1<ad64>3.095 E F0 .595
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+.233(If a comp-)5.233 F .481(spec has been de\214ned for that command, \
+the compspec is used to generate the list of possible completions)108
+124.8 R .823(for the w)108 136.8 R 3.323(ord. If)-.1 F .823
+(the command w)3.323 F .822(ord is a full pathname, a compspec for the \
+full pathname is searched for)-.1 F 2.866(\214rst. If)108 148.8 R .367(\
+no compspec is found for the full pathname, an attempt is made to \214n\
+d a compspec for the portion)2.866 F(follo)108 160.8 Q .299
+(wing the \214nal slash.)-.25 F .298
+(If those searches do not result in a compspec, an)5.299 F 2.798(yc)-.15
+G .298(ompspec de\214ned with the)-2.798 F F1<ad44>2.798 E F0(option to)
+108 172.8 Q F1(complete)2.5 E F0(is used as the def)2.5 E(ault.)-.1 E
+.817(Once a compspec has been found, it is used to generate the list of\
+ matching w)108 189.6 R 3.317(ords. If)-.1 F 3.317(ac)3.317 G .817
+(ompspec is not)-3.317 F(found, the def)108 201.6 Q(ault)-.1 E F1(bash)
+2.5 E F0(completion as described abo)2.5 E .3 -.15(ve u)-.15 H(nder).15
+E F1(Completing)2.5 E F0(is performed.)2.5 E .464
+(First, the actions speci\214ed by the compspec are used.)108 218.4 R
+.463(Only matches which are pre\214x)5.464 F .463(ed by the w)-.15 F
+.463(ord being)-.1 F .595(completed are returned.)108 230.4 R .595
+(When the)5.595 F F1<ad66>3.095 E F0(or)3.095 E F1<ad64>3.095 E F0 .596
(option is used for \214lename or directory name completion, the)3.095 F
-(shell v)108 189.6 Q(ariable)-.25 E/F2 9/Times-Bold@0 SF(FIGNORE)2.5 E
-F0(is used to \214lter the matches.)2.25 E(An)108 206.4 Q 4.084(yc)-.15
+(shell v)108 242.4 Q(ariable)-.25 E/F2 9/Times-Bold@0 SF(FIGNORE)2.5 E
+F0(is used to \214lter the matches.)2.25 E(An)108 259.2 Q 4.084(yc)-.15
G 1.584(ompletions speci\214ed by a pathname e)-4.084 F 1.584
(xpansion pattern to the)-.15 F F1<ad47>4.084 E F0 1.584
-(option are generated ne)4.084 F 4.084(xt. The)-.15 F -.1(wo)108 218.4 S
-.555(rds generated by the pattern need not match the w).1 F .554
-(ord being completed.)-.1 F(The)5.554 E F2(GLOBIGNORE)3.054 E F0 .554
-(shell v)2.804 F(ari-)-.25 E
-(able is not used to \214lter the matches, b)108 230.4 Q(ut the)-.2 E F2
-(FIGNORE)2.5 E F0 -.25(va)2.25 G(riable is used.).25 E(Ne)108 247.2 Q
-.32(xt, the string speci\214ed as the ar)-.15 F .32(gument to the)-.18 F
-F1<ad57>2.82 E F0 .321(option is considered.)2.821 F .321
-(The string is \214rst split using the)5.321 F .413(characters in the)
-108 259.2 R F2(IFS)2.913 E F0 .412(special v)2.663 F .412
+(option are generated ne)4.084 F 4.084(xt. The)-.15 F -.1(wo)108 271.2 S
+.554(rds generated by the pattern need not match the w).1 F .555
+(ord being completed.)-.1 F(The)5.555 E F2(GLOBIGNORE)3.055 E F0 .555
+(shell v)2.805 F(ari-)-.25 E
+(able is not used to \214lter the matches, b)108 283.2 Q(ut the)-.2 E F2
+(FIGNORE)2.5 E F0 -.25(va)2.25 G(riable is used.).25 E(Ne)108 300 Q .321
+(xt, the string speci\214ed as the ar)-.15 F .321(gument to the)-.18 F
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+(The string is \214rst split using the)5.32 F .412(characters in the)108
+312 R F2(IFS)2.912 E F0 .412(special v)2.662 F .412
(ariable as delimiters.)-.25 F .412(Shell quoting is honored.)5.412 F
-.412(Each w)5.412 F .412(ord is then e)-.1 F(xpanded)-.15 E .091
-(using brace e)108 271.2 R .091(xpansion, tilde e)-.15 F .092
-(xpansion, parameter and v)-.15 F .092(ariable e)-.25 F .092
-(xpansion, command substitution, and arith-)-.15 F 1.397(metic e)108
-283.2 R 1.396(xpansion, as described abo)-.15 F 1.696 -.15(ve u)-.15 H
-(nder).15 E F2(EXP)3.896 E(ANSION)-.666 E/F3 9/Times-Roman@0 SF(.)A F0
-1.396(The results are split using the rules described)5.896 F(abo)108
-295.2 Q .509 -.15(ve u)-.15 H(nder).15 E F1 -.75(Wo)2.709 G .209
-(rd Splitting).75 F F0 5.209(.T)C .209(he results of the e)-5.209 F .209
-(xpansion are pre\214x-matched ag)-.15 F .21(ainst the w)-.05 F .21
-(ord being com-)-.1 F(pleted, and the matching w)108 307.2 Q
-(ords become the possible completions.)-.1 E 1.238
-(After these matches ha)108 324 R 1.538 -.15(ve b)-.2 H 1.238
-(een generated, an).15 F 3.738(ys)-.15 G 1.237
-(hell function or command speci\214ed with the)-3.738 F F1<ad46>3.737 E
-F0(and)3.737 E F1<ad43>3.737 E F0 3.375(options is in)108 336 R -.2(vo)
--.4 G -.1(ke).2 G 5.875(d. When).1 F 3.375
+.413(Each w)5.412 F .413(ord is then e)-.1 F(xpanded)-.15 E .092
+(using brace e)108 324 R .092(xpansion, tilde e)-.15 F .092
+(xpansion, parameter and v)-.15 F .092(ariable e)-.25 F .091
+(xpansion, command substitution, and arith-)-.15 F 1.396(metic e)108 336
+R 1.396(xpansion, as described abo)-.15 F 1.696 -.15(ve u)-.15 H(nder)
+.15 E F2(EXP)3.896 E(ANSION)-.666 E/F3 9/Times-Roman@0 SF(.)A F0 1.396
+(The results are split using the rules described)5.896 F(abo)108 348 Q
+.51 -.15(ve u)-.15 H(nder).15 E F1 -.75(Wo)2.71 G .21(rd Splitting).75 F
+F0 5.21(.T)C .209(he results of the e)-5.21 F .209
+(xpansion are pre\214x-matched ag)-.15 F .209(ainst the w)-.05 F .209
+(ord being com-)-.1 F(pleted, and the matching w)108 360 Q
+(ords become the possible completions.)-.1 E 1.237
+(After these matches ha)108 376.8 R 1.537 -.15(ve b)-.2 H 1.237
+(een generated, an).15 F 3.737(ys)-.15 G 1.238
+(hell function or command speci\214ed with the)-3.737 F F1<ad46>3.738 E
+F0(and)3.738 E F1<ad43>3.738 E F0 3.376(options is in)108 388.8 R -.2
+(vo)-.4 G -.1(ke).2 G 5.875(d. When).1 F 3.375
(the command or function is in)5.875 F -.2(vo)-.4 G -.1(ke).2 G 3.375
-(d, the).1 F F2(COMP_LINE)5.876 E F3(,)A F2(COMP_POINT)5.626 E F3(,)A F2
-(COMP_KEY)108 348 Q F3(,)A F0(and)2.408 E F2(COMP_TYPE)2.658 E F0 -.25
-(va)2.408 G .157(riables are assigned v).25 F .157
-(alues as described abo)-.25 F .457 -.15(ve u)-.15 H(nder).15 E F1 .157
-(Shell V)2.657 F(ariables)-.92 E F0 5.157(.I)C(f)-5.157 E 3.485(as)108
-360 S .986(hell function is being in)-3.485 F -.2(vo)-.4 G -.1(ke).2 G
+(d, the).1 F F2(COMP_LINE)5.875 E F3(,)A F2(COMP_POINT)5.625 E F3(,)A F2
+(COMP_KEY)108 400.8 Q F3(,)A F0(and)2.407 E F2(COMP_TYPE)2.657 E F0 -.25
+(va)2.407 G .157(riables are assigned v).25 F .157
+(alues as described abo)-.25 F .457 -.15(ve u)-.15 H(nder).15 E F1 .158
+(Shell V)2.658 F(ariables)-.92 E F0 5.158(.I)C(f)-5.158 E 3.486(as)108
+412.8 S .986(hell function is being in)-3.486 F -.2(vo)-.4 G -.1(ke).2 G
.986(d, the).1 F F2(COMP_W)3.486 E(ORDS)-.09 E F0(and)3.236 E F2
(COMP_CW)3.486 E(ORD)-.09 E F0 -.25(va)3.236 G .986
-(riables are also set.).25 F(When)5.986 E .609
-(the function or command is in)108 372 R -.2(vo)-.4 G -.1(ke).2 G .608
+(riables are also set.).25 F(When)5.985 E .608
+(the function or command is in)108 424.8 R -.2(vo)-.4 G -.1(ke).2 G .608
(d, the \214rst ar).1 F .608(gument is the name of the command whose ar)
--.18 F .608(guments are)-.18 F .073(being completed, the second ar)108
-384 R .073(gument is the w)-.18 F .073
+-.18 F .609(guments are)-.18 F .073(being completed, the second ar)108
+436.8 R .073(gument is the w)-.18 F .073
(ord being completed, and the third ar)-.1 F .073(gument is the w)-.18 F
-.073(ord pre-)-.1 F .608(ceding the w)108 396 R .607
-(ord being completed on the current command line.)-.1 F .607
-(No \214ltering of the generated completions)5.607 F(ag)108 408 Q .093
+.072(ord pre-)-.1 F .607(ceding the w)108 448.8 R .607
+(ord being completed on the current command line.)-.1 F .608
+(No \214ltering of the generated completions)5.607 F(ag)108 460.8 Q .094
(ainst the w)-.05 F .093(ord being completed is performed; the function\
or command has complete freedom in generat-)-.1 F(ing the matches.)108
-420 Q(An)108 436.8 Q 2.938(yf)-.15 G .437(unction speci\214ed with)
--2.93
8 F F1<ad46>2.937 E F0 .437(is in)2.937 F -.2(vo)-.4 G -.1(ke).2 G
+472.8 Q(An)108 489.6 Q 2.937(yf)-.15 G .437(unction speci\214ed with)
+-2.93
7 F F1<ad46>2.937 E F0 .437(is in)2.937 F -.2(vo)-.4 G -.1(ke).2 G
2.937<648c>.1 G 2.937(rst. The)-2.937 F .437(function may use an)2.937 F
-2.937(yo)-.15 G 2.937(ft)-2.937 G .437(he shell f)-2.937 F .437
-(acilities, including)-.1 F(the)108 448.8 Q F1(compgen)2.956 E F0 -.2
-(bu)2.956 G .456(iltin described belo).2 F 1.756 -.65(w, t)-.25 H 2.956
-(og).65 G .456(enerate the matches.)-2.956 F .457
+2.937(yo)-.15 G 2.937(ft)-2.937 G .437(he shell f)-2.937 F .438
+(acilities, including)-.1 F(the)108 501.6 Q F1(compgen)2.957 E F0 -.2
+(bu)2.957 G .457(iltin described belo).2 F 1.756 -.65(w, t)-.25 H 2.956
+(og).65 G .456(enerate the matches.)-2.956 F .456
(It must put the possible completions in the)5.456 F F2(COMPREPL)108
-460.8 Q(Y)-.828 E F0(array v)2.25 E(ariable.)-.25 E(Ne)108 477.6 Q .081
-(xt, an)-.15 F 2.581(yc)-.15 G .081(ommand speci\214ed with the)-2.581 F
-F1<ad43>2.581 E F0 .081(option is in)2.581 F -.2(vo)-.4 G -.1(ke).2 G
-2.581(di).1 G 2.58(na)-2.581 G 2.58(ne)-2.58 G -.4(nv)-2.58 G .08
-(ironment equi).4 F -.25(va)-.25 G .08(lent to command sub-).25 F 2.858
-(stitution. It)108 489.6 R .359(should print a list of completions, one\
- per line, to the standard output.)2.858 F .359(Backslash may be used)
-5.359 F(to escape a ne)108 501.6 Q(wline, if necessary)-.25 E(.)-.65 E
-.377(After all of the possible completions are generated, an)108 518.4 R
-2.877<798c>-.15 G .377(lter speci\214ed with the)-2.877 F F1<ad58>2.876
-E F0 .376(option is applied to the)2.876 F 3.181(list. The)108 530.4 R
-.681(\214lter is a pattern as used for pathname e)3.181 F .681
-(xpansion; a)-.15 F F1(&)3.181 E F0 .682
-(in the pattern is replaced with the te)3.182 F .682(xt of)-.15 F .523
-(the w)108 542.4 R .523(ord being completed.)-.1 F 3.023(Al)5.523 G
-(iteral)-3.023 E F1(&)3.023 E F0 .522
+513.6 Q(Y)-.828 E F0(array v)2.25 E(ariable.)-.25 E(Ne)108 530.4 Q .08
+(xt, an)-.15 F 2.58(yc)-.15 G .08(ommand speci\214ed with the)-2.58 F F1
+<ad43>2.58 E F0 .081(option is in)2.581 F -.2(vo)-.4 G -.1(ke).2 G 2.581
+(di).1 G 2.581(na)-2.581 G 2.581(ne)-2.581 G -.4(nv)-2.581 G .081
+(ironment equi).4 F -.25(va)-.25 G .081(lent to command sub-).25 F 2.859
+(stitution. It)108 542.4 R .359(should print a list of completions, one\
+ per line, to the standard output.)2.859 F .358(Backslash may be used)
+5.359 F(to escape a ne)108 554.4 Q(wline, if necessary)-.25 E(.)-.65 E
+.376(After all of the possible completions are generated, an)108 571.2 R
+2.877<798c>-.15 G .377(lter speci\214ed with the)-2.877 F F1<ad58>2.877
+E F0 .377(option is applied to the)2.877 F 3.182(list. The)108 583.2 R
+.682(\214lter is a pattern as used for pathname e)3.182 F .681
+(xpansion; a)-.15 F F1(&)3.181 E F0 .681
+(in the pattern is replaced with the te)3.181 F .681(xt of)-.15 F .522
+(the w)108 595.2 R .522(ord being completed.)-.1 F 3.022(Al)5.522 G
+(iteral)-3.022 E F1(&)3.022 E F0 .523
(may be escaped with a backslash; the backslash is remo)3.022 F -.15(ve)
--.15 G 3.022(db).15 G(efore)-3.022 E .849(attempting a match.)108 554.4
-R(An)5.849 E 3.349(yc)-.15 G .849
-(ompletion that matches the pattern will be remo)-3.349 F -.15(ve)-.15 G
-3.35(df).15 G .85(rom the list.)-3.35 F 3.35(Al)5.85 G(eading)-3.35 E F1
-(!)3.35 E F0(ne)108 566.4 Q -.05(ga)-.15 G
+-.15 G 3.023(db).15 G(efore)-3.023 E .85(attempting a match.)108 607.2 R
+(An)5.85 E 3.35(yc)-.15 G .849
+(ompletion that matches the pattern will be remo)-3.35 F -.15(ve)-.15 G
+3.349(df).15 G .849(rom the list.)-3.349 F 3.349(Al)5.849 G(eading)
+-3.349 E F1(!)3.349 E F0(ne)108 619.2 Q -.05(ga)-.15 G
(tes the pattern; in this case an).05 E 2.5(yc)-.15 G
(ompletion not matching the pattern will be remo)-2.5 E -.15(ve)-.15 G
-(d.).15 E(Finally)108 583.2 Q 3.087(,a)-.65 G .887 -.15(ny p)-3.087 H
-.587(re\214x and suf).15 F .587(\214x speci\214ed with the)-.25 F F1
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<ad50>3.087 E F0(and)3.087 E F1<ad53>3.087 E F0 .587
+(d.).15 E(Finally)108 636 Q 3.086(,a)-.65 G .886 -.15(ny p)-3.086 H .586
+(re\214x and suf).15 F .587(\214x speci\214ed with the)-.25 F F1<ad50>
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(options are added to each member of the com-)3.087 F(pletion list, and\
the result is returned to the readline completion code as the list of \
-possible completions.)108 595.2 Q .246(If the pre)108 612 R .247
+possible completions.)108 648 Q .247(If the pre)108 664.8 R .247
(viously-applied actions do not generate an)-.25 F 2.747(ym)-.15 G .247
(atches, and the)-2.747 F F1 .247(\255o dir)2.747 F(names)-.15 E F0 .247
-(option w)2.747 F .247(as supplied to)-.1 F F1(complete)108 624 Q F0
+(option w)2.747 F .246(as supplied to)-.1 F F1(complete)108 676.8 Q F0
(when the compspec w)2.5 E
-(as de\214ned, directory name completion is attempted.)-.1 E .462
-(If the)108 640.8 R F1 .462(\255o plusdirs)2.962 F F0 .462(option w)
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(when the compspec w)2.962 F .462(as de\214ned, directory name com-)-.1
-F(pletion is attempted and an)108 652.8 Q 2.5(ym)-.15 G
-(atches are added to the results of the other actions.)-2.5 E .559
-(By def)108 669.6 R .559(ault, if a compspec is found, whate)-.1 F -.15
-(ve)-.25 G 3.059(ri).15 G 3.059(tg)-3.059 G .56
-(enerates is returned to the completion code as the full set)-3.059 F
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-E F1(bash)3.132 E F0 .631
-(completions are not attempted, and the readline def)3.131 F .631
-(ault of \214le-)-.1 F .558(name completion is disabled.)108 693.6 R
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-(when the compspec)3.059 F -.1(wa)108 705.6 S 3.172(sd).1 G .672
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-(ault completions are attempted if the compspec generates no matches.)
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+(ault of \214le-)-.1 F .559(name completion is disabled.)108 96 R .559
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F .93(completion handlers to indicate that completion should be retried\
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+ by returning an e)108 225.6 R .93(xit status of 124.)-.15 F .93(If a)
5.93 F .1(shell function returns 124, and changes the compspec associat\
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-(being attempted \(supplied as the \214rst ar)108 184.8 R .666
-(gument when the function is e)-.18 F -.15(xe)-.15 G .666
-(cuted\), programmable completion).15 F .084(restarts from the be)108
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--.25 G .084(ompspec for that command.)-2.584 F .083(This allo)5.083 F
-.083(ws a set of)-.25 F(completions to be b)108 208.8 Q(uilt dynamicall\
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+(iltin may be used to add commands to the).2 F
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--.25 F 2.2(xpansion mechanism \(see the)-.15 F 1.147(description of)108
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-(mark history timestamps when writing the history \214le.)108 456 Q F2
-(Ev)87 472.8 Q(ent Designators)-.1 E F0 .204(An e)108 484.8 R -.15(ve)
+(mark history timestamps when writing the history \214le.)108 508.8 Q F1
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-.25 G .204(nt designator is a reference to a command line entry in the\
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-(or the shell, this is the command w)-.15 E(ord.)-.1 E/F2 10
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+(Wo)87 100.8 S(rd Designators).75 E F0 -.8(Wo)108 112.8 S 1.313
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237.6 Q F1<ad>A F2(y)A F0 2.5(Ar)20.65 G(ange of w)-2.5 E
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--.15(ve)-.25 G(nt.).15 E F1(Modi\214ers)87 254.4 Q F0 .184
-(After the optional w)108 266.4 R .184(ord designator)-.1 F 2.684(,t)-.4
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-108 295.2 Q F0(Remo)30.44 E .3 -.15(ve a t)-.15 H
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(ll leading \214le name components, lea).15 E(ving the tail.)-.2 E F1(r)
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(The \214nal delimiter is optional if it is the last character of the e)
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(If & appears in)5.666 F F2(ne)3.166 E(w)-.15 E F0 3.166(,i).31 G 3.166
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-(ous history substitutions took place, the last)144 439.2 Q F2(string)
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-(g)108 463.2 Q F0 .397(Cause changes to be applied o)31 F -.15(ve)-.15 G
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-('\()C(e.g.,)-2.898 E(`)144 475.2 Q F1(:gs/)A F2(old)A F1(/)A F2(ne)A(w)
--.15 E F1(/)A F0 1.219('\) or `)B F1(:&)A F0 3.719('. If)B 1.219
-(used with `)3.719 F F1(:s)A F0 1.218(', an)B 3.718(yd)-.15 G 1.218
-(elimiter can be used in place of /, and the \214nal)-3.718 F .089
-(delimiter is optional if it is the last character of the e)144 487.2 R
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(vironment, and its output is used as the possible)-.4 F(completions.)
-184 348 Q F1<ad46>144 360 Q F3(function)2.5 E F0 1.181
-(The shell function)184 372 R F3(function)3.681 E F0 1.181(is e)3.681 F
--.15(xe)-.15 G 1.181(cuted in the current shell en).15 F 3.68
-(vironment. When)-.4 F 1.18(it \214n-)3.68 F .932
-(ishes, the possible completions are retrie)184 384 R -.15(ve)-.25 G
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3.432(df).15 G .932(rom the v)-3.432 F .932(alue of the)-.25 F F2
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-F1<ad50>144 444 Q F3(pr)2.5 E(e\214x)-.37 E(pr)184 456 Q(e\214x)-.37 E
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+(COMPREPL)3.431 E(Y)-.828 E F0(array)3.181 E -.25(va)184 492 S(riable.)
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(ginning of each possible completion after all other options ha)-.15 F
--.15(ve)-.2 G(been applied.)184 468 Q F1<ad53>144 480 Q F3(suf)2.5 E
+-.15(ve)-.2 G(been applied.)184 564 Q F1<ad53>144 576 Q F3(suf)2.5 E
2.81(\214x suf)-.18 F<8c78>-.18 E F0
(is appended to each possible completion after all other options ha)2.5
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-(dlist)-.37 E F0(The)184 504 Q F3(wor)3.64 E(dlist)-.37 E F0 1.14
-(is split using the characters in the)3.64 F F2(IFS)3.64 E F0 1.139
-(special v)3.39 F 1.139(ariable as delimiters, and)-.25 F 2.007
-(each resultant w)184 516 R 2.007(ord is e)-.1 F 4.507(xpanded. The)-.15
-F 2.008(possible completions are the members of the)4.507 F
-(resultant list which match the w)184 528 Q(ord being completed.)-.1 E
-F1<ad58>144 540 Q F3(\214lterpat)2.5 E(\214lterpat)184 552 Q F0 .456
-(is a pattern as used for pathname e)2.956 F 2.956(xpansion. It)-.15 F
-.455(is applied to the list of possible)2.956 F 1.596
-(completions generated by the preceding options and ar)184 564 R 1.596
-(guments, and each completion)-.18 F(matching)184 576 Q F3(\214lterpat)
-3.205 E F0 .705(is remo)3.205 F -.15(ve)-.15 G 3.205(df).15 G .704
-(rom the list.)-3.205 F 3.204(Al)5.704 G(eading)-3.204 E F1(!)3.204 E F0
-(in)3.204 E F3(\214lterpat)3.204 E F0(ne)3.204 E -.05(ga)-.15 G .704
-(tes the pattern;).05 F(in this case, an)184 588 Q 2.5(yc)-.15 G
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+(each resultant w)184 612 R 2.008(ord is e)-.1 F 4.508(xpanded. The)-.15
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+(is a pattern as used for pathname e)2.955 F 2.956(xpansion. It)-.15 F
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+(completions generated by the preceding options and ar)184 660 R 1.596
+(guments, and each completion)-.18 F(matching)184 672 Q F3(\214lterpat)
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+(rom the list.)-3.204 F 3.204(Al)5.704 G(eading)-3.204 E F1(!)3.204 E F0
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+(tes the pattern;).05 F(in this case, an)184 684 Q 2.5(yc)-.15 G
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--.15(ve)-.15 G(d.).15 E .466(The return v)144 604.8 R .466
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-(lid option is supplied, an option other than).25 F F1<ad70>2.967 E F0
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-(plied without a)144 616.8 R F3(name)3.862 E F0(ar)3.862 E 1.361
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-(completion if no)144 669.6 R F3(name)3.226 E F0 3.226(sa)C .726
-(re supplied.)-3.226 F .725(If no)5.725 F F3(option)3.225 E F0 3.225(sa)
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-(option indicates that the remaining options should apply to)2.797 F
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+(n, display the completion options for).15 F(each)144 120 Q F2(name)
+3.224 E F0 .724(or the current completion.)3.224 F .724(The possible v)
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+(option indicates that the remaining options should apply to)2.797 F
+1.228(the `)144 144 R(`def)-.74 E(ault')-.1 E 3.728('c)-.74 G 1.228(omm\
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+(viously been de\214ned.)-.25 F(The)7.177 E F1<ad45>4.677 E F0 2.178
+(option indicates that the remaining options)4.678 F(should apply to `)
+144 168 Q(`empty')-.74 E 2.5('c)-.74 G
+(ommand completion; that is, completion attempted on a blank line.)-2.5
+E 1.388(The return v)144 192 R 1.388(alue is true unless an in)-.25 F
+-.25(va)-.4 G 1.387
(lid option is supplied, an attempt is made to modify the).25 F
-(options for a)144 96 Q/F1 10/Times-Italic@0 SF(name)2.5 E F0
+(options for a)144 204 Q F2(name)2.5 E F0
(for which no completion speci\214cation e)2.5 E
-(xists, or an output error occurs.)-.15 E/F2 10/Times-Bold@0 SF
-(continue)108 112.8 Q F0([)2.5 E F1(n)A F0(])A 1.754(Resume the ne)144
-124.8 R 1.754(xt iteration of the enclosing)-.15 F F2 -.25(fo)4.254 G(r)
-.25 E F0(,)A F2(while)4.254 E F0(,)A F2(until)4.254 E F0 4.254(,o)C(r)
--4.254 E F2(select)4.254 E F0 4.253(loop. If)4.254 F F1(n)4.613 E F0
-1.753(is speci\214ed,)4.493 F 1.208(resume at the)144 136.8 R F1(n)3.709
-E F0 1.209(th enclosing loop.)B F1(n)6.569 E F0 1.209(must be)3.949 F/F3
-10/Symbol SF<b3>3.709 E F0 3.709(1. If)3.709 F F1(n)4.069 E F0 1.209
-(is greater than the number of enclosing)3.949 F .514
-(loops, the last enclosing loop \(the `)144 148.8 R(`top-le)-.74 E -.15
-(ve)-.25 G(l').15 E 3.014('l)-.74 G .514(oop\) is resumed.)-3.014 F .513
-(The return v)5.513 F .513(alue is 0 unless)-.25 F F1(n)3.013 E F0(is)
-3.013 E(not greater than or equal to 1.)144 160.8 Q F2(declar)108 177.6
-Q(e)-.18 E F0([)2.5 E F
2(\255aAfFgilrtux)A F0 2.5(][)C F2<ad70>-2.5 E F0
-2.5(][)C F1(name)-2.5 E F0([=)A F1(value)A F0 2.5(].)C(..])-2.5 E F2
-(typeset)108 189.6 Q F0([)2.5 E F2(\255aAfFgilrtux)A F0 2.5(][)C F2
-<ad70>-2.5 E F0 2.5(][)C F1(name)-2.5 E F0([=)A F1(value)A F0 2.5(].)C
-(..])-2.5 E 1.264(Declare v)144 201.6 R 1.264(ariables and/or gi)-.25 F
-1.564 -.15(ve t)-.25 H 1.264(hem attrib).15 F 3.765(utes. If)-.2 F(no)
-3.765 E F1(name)3.765 E F0 3.765(sa)C 1.265(re gi)-3.765 F -.15(ve)-.25
-G 3.765(nt).15 G 1.265(hen display the v)-3.765 F 1.265(alues of)-.25 F
--.25(va)144 213.6 S 3.483(riables. The).25 F F2<ad70>3.483 E F0 .983
-(option will display the attrib)3.483 F .983(utes and v)-.2 F .982
-(alues of each)-.25 F F1(name)3.482 E F0 5.982(.W).18 G(hen)-5.982 E F2
-<ad70>3.482 E F0 .982(is used)3.482 F(with)144 225.6 Q F1(name)3.579 E
-F0(ar)3.579 E 1.079(guments, additional options are ignored.)-.18 F
-(When)6.079 E F2<ad70>3.579 E F0 1.079(is supplied without)3.579 F F1
-(name)3.58 E F0(ar)3.58 E(gu-)-.18 E .151
-(ments, it will display the attrib)144 237.6 R .151(utes and v)-.2 F
-.151(alues of all v)-.25 F .15(ariables ha)-.25 F .15(ving the attrib)
--.2 F .15(utes speci\214ed by the)-.2 F .046(additional options.)144
-249.6 R .046(If no other options are supplied with)5.046 F F2<ad70>2.547
-E F0(,)A F2(declar)2.547 E(e)-.18 E F0 .047(will display the attrib)
-2.547 F .047(utes and)-.2 F -.25(va)144 261.6 S 1.363
-(lues of all shell v).25 F 3.863(ariables. The)-.25 F F2<ad66>3.863 E F0
-1.362(option will restrict the display to shell functions.)3.863 F(The)
-6.362 E F2<ad46>3.862 E F0 2.422(option inhibits the display of functio\
-n de\214nitions; only the function name and attrib)144 273.6 R 2.423
-(utes are)-.2 F 2.664(printed. If)144 285.6 R(the)2.664 E F2(extdeb)
-2.664 E(ug)-.2 E F0 .164(shell option is enabled using)2.664 F F2(shopt)
-2.664 E F0 2.664(,t)C .163(he source \214le name and line number)-2.664
-F 1.288(where the function is de\214ned are displayed as well.)144 297.6
-R(The)6.288 E F
2<ad46>3.788 E F0 1.288(option implies)3.788 F F2<ad66>
-3.788 E F0 6.288(.T)C(he)-6.288 E F2<ad67>3.789 E F0(option)3.789 E .491
-(forces v)144 309.6 R .491
+(xists, or an output error occurs.)-.15 E F1(continue)108 220.8 Q F0([)
+2.5 E F2(n)A F0(])A 1.753(Resume the ne)144 232.8 R 1.753
+(xt iteration of the enclosing)-.15 F F1 -.25(fo)4.254 G(r).25 E F0(,)A
+F1(while)4.254 E F0(,)A F1(until)4.254 E F0 4.254(,o)C(r)-4.254 E F1
+(select)4.254 E F0 4.254(loop. If)4.254 F F2(n)4.614 E F0 1.754
+(is speci\214ed,)4.494 F 1.209(resume at the)144 244.8 R F2(n)3.709 E F0
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(option suppresses the command numbers when listing.)2.522 F(The)5.022 E
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-(acters may not be used as option characters.)144 225.6 R 1.665
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-(normally parses the positional parameters, b)4.893 F 2.392
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-(ni).15 G(n)-4.892 E F1(ar)4.892 E(gs)-.37 E F0(,).27 E F2(getopts)144
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-(can report errors in tw)3.665 F 3.665(ow)-.1 G 3.665(ays. If)-3.765 F
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-(ginning with the history comment character follo)-.15 F .956
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(alue is 0 unless an in)-.25 F -.25(va)-.4 G(lid).25 E .499(option is e\
ncountered, an error occurs while reading or writing the history \214le\
-, an in)144 561.6 R -.25(va)-.4 G(lid).25 E F2(of)3 E(fset)-.18 E F0(is)
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-(he follo).15 E(wing meanings:)-.25 E F1<ad6c>144 626.4 Q F0
-(List process IDs in addition to the normal information.)27.52 E F1
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--.35 E .395(If the)144 84 R/F1 10/Times-Bold@0 SF<ad78>2.895 E F0 .394
-(option is supplied,)2.894 F F1(jobs)2.894 E F0 .394(replaces an)2.894 F
-(y)-.15 E/F2 10/Times-Italic@0 SF(jobspec)4.634 E F0 .394(found in)3.204
-F F2(command)3.094 E F0(or)3.664 E F2(ar)3.224 E(gs)-.37 E F0 .394
-(with the corre-)3.164 F(sponding process group ID, and e)144 96 Q -.15
-(xe)-.15 G(cutes).15 E F2(command)2.7 E F0(passing it)3.27 E F2(ar)2.5 E
-(gs)-.37 E F0 2.5(,r).27 G(eturning its e)-2.5 E(xit status.)-.15 E F1
-(kill)108 112.8 Q F0([)2.5 E F1<ad73>A F2(sigspec)2.5 E F0(|)2.5 E F1
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-(kill \255l)108 124.8 Q F0([)2.5 E F2(sigspec)A F0(|)2.5 E F2 -.2(ex)2.5
-G(it_status).2 E F0(])A .119(Send the signal named by)144 136.8 R F2
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-(to the processes named by)2.939 F F2(pid)3.87 E F0(or)3.39 E F2
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-(either a case-insensiti)144 148.8 R .619 -.15(ve s)-.25 H .319
-(ignal name such as).15 F/F3 9/Times-Bold@0 SF(SIGKILL)2.819 E F0 .318
-(\(with or without the)2.569 F F3(SIG)2.818 E F0 .318
-(pre\214x\) or a signal)2.568 F(number;)144 160.8 Q F2(signum)4.188 E F0
-1.349(is a signal number)4.168 F 6.349(.I)-.55 G(f)-6.349 E F2(sigspec)
+-.35 E/F1 10/Times-Bold@0 SF<ad6c>144 84 Q F0
+(List process IDs in addition to the normal information.)27.52 E F1
+<ad6e>144 96 Q F0 .193(Display information only about jobs that ha)24.74
+F .494 -.15(ve c)-.2 H .194(hanged status since the user w).15 F .194
+(as last noti-)-.1 F(\214ed of their status.)180 108 Q F1<ad70>144 120 Q
+F0(List only the process ID of the job')24.74 E 2.5(sp)-.55 G
+(rocess group leader)-2.5 E(.)-.55 E F1<ad72>144 132 Q F0
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+1.348(is assumed.)3.599 F(An)6.348 E(ar)144 278.4 Q .522(gument of)-.18
F F1<ad6c>3.023 E F0 .523(lists the signal names.)3.023 F .523(If an)
5.523 F 3.023(ya)-.15 G -.18(rg)-3.023 G .523(uments are supplied when)
.18 F F1<ad6c>3.023 E F0 .523(is gi)3.023 F -.15(ve)-.25 G .523
-(n, the names).15 F .28(of the signals corresponding to the ar)144 184.8
+(n, the names).15 F .28(of the signals corresponding to the ar)144 290.4
R .28(guments are listed, and the return status is 0.)-.18 F(The)5.28 E
-F2 -.2(ex)2.78 G(it_status).2 E F0(ar)144 196.8 Q .378(gument to)-.18 F
-F1<ad6c>2.878 E F0 .378
-(is a number specifying either a signal number or the e)2.878 F .377
-(xit status of a process termi-)-.15 F .593(nated by a signal.)144 208.8
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+(xit status of a process termi-)-.15 F .594(nated by a signal.)144 314.4
R F1(kill)5.593 E F0 .593(returns true if at least one signal w)3.093 F
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-E F0(...])2.5 E(Each)144 249.6 Q F2(ar)3.027 E(g)-.37 E F0 .197
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(luates to 0,).25 E F1(let)2.5 E F0(returns 1; 0 is returned otherwise.)
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--2.5 E F0([=)A F2(value)A F0 2.5(].)C(..])-2.5 E -.15(Fo)144 290.4 S
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-(ariable named)-.25 F F2(name)2.92 E F0 .06(is created, and assigned)
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-(he options accepted by)-3.153 F F1(declar)3.153 E(e)-.18 E F0 5.652(.W)
-C(hen)-5.652 E F1(local)3.152 E F0 .652
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(is used within a function, it causes the v)3.152 F(ari-)-.25 E(able)144
-314.4 Q F2(name)3.72 E F0 .86(to ha)3.54 F 1.16 -.15(ve a v)-.2 H .861
+420 Q F2(name)3.721 E F0 .861(to ha)3.541 F 1.161 -.15(ve a v)-.2 H .861
(isible scope restricted to that function and its children.).15 F -.4
-(Wi)5.861 G .861(th no operands,).4 F F1(local)144 326.4 Q F0 1.165
-(writes a list of local v)3.665 F 1.165
+(Wi)5.86 G .86(th no operands,).4 F F1(local)144 432 Q F0 1.164
+(writes a list of local v)3.664 F 1.165
(ariables to the standard output.)-.25 F 1.165(It is an error to use)
-6.165 F F1(local)3.664 E F0 1.164(when not)3.664 F .232
-(within a function.)144 338.4 R .233(The return status is 0 unless)5.232
-F F1(local)2.733 E F0 .233(is used outside a function, an in)2.733 F
--.25(va)-.4 G(lid).25 E F2(name)3.093 E F0(is)2.913 E(supplied, or)144
-350.4 Q F2(name)2.5 E F0(is a readonly v)2.5 E(ariable.)-.25 E F1
-(logout)108 367.2 Q F0(Exit a login shell.)9.33 E F1(map\214le)108 384 Q
-F0([)2.5 E F1<ad6e>A F2(count)2.5 E F0 2.5(][)C F1<ad4f>-2.5 E F2
-(origin)2.5 E F0 2.5(][)C F1<ad73>-2.5 E F2(count)2.5 E F0 2.5(][)C F1
-<ad74>-2.5 E F0 2.5(][)C F1<ad75>-2.5 E F2(fd)2.5 E F0 2.5(][)C F1<ad43>
--2.5 E F2(callbac)2.5 E(k)-.2 E F0 2.5(][)C F1<ad63>-2.5 E F2(quantum)
-2.5 E F0 2.5(][)C F2(arr)-2.5 E(ay)-.15 E F0(])A F1 -.18(re)108 396 S
-(adarray).18 E F0([)2.5 E F1<ad6e>A F2(count)2.5 E F0 2.5(][)C F1<ad4f>
--2.5 E F2(origin)2.5 E F0 2.5(][)C F1<ad73>-2.5 E F2(count)2.5 E F0 2.5
-(][)C F1<ad74>-2.5 E F0 2.5(][)C F1<ad75>-2.5 E F2(fd)2.5 E F0 2.5(][)C
-F1<ad43>-2.5 E F2(callbac)2.5 E(k)-.2 E F0 2.5(][)C F1<ad63>-2.5 E F2
-(quantum)2.5 E F0 2.5(][)C F2(arr)-2.5 E(ay)-.15 E F0(])A .351
-(Read lines from the standard input into the inde)144 408 R -.15(xe)-.15
-G 2.851(da).15 G .351(rray v)-2.851 F(ariable)-.25 E F2(arr)2.85 E(ay)
--.15 E F0 2.85(,o).32 G 2.85(rf)-2.85 G .35(rom \214le descriptor)-2.85
-F F2(fd)2.85 E F0 1.248(if the)144 420 R F1<ad75>3.748 E F0 1.248
-(option is supplied.)3.748 F 1.249(The v)6.249 F(ariable)-.25 E F3
-(MAPFILE)3.749 E F0 1.249(is the def)3.499 F(ault)-.1 E F2(arr)3.749 E
-(ay)-.15 E F0 6.249(.O)C 1.249(ptions, if supplied,)-6.249 F(ha)144 432
-Q .3 -.15(ve t)-.2 H(he follo).15 E(wing meanings:)-.25 E F1<ad6e>144
-444 Q F0(Cop)24.74 E 2.5(ya)-.1 G 2.5(tm)-2.5 G(ost)-2.5 E F2(count)2.7
-E F0 2.5(lines. If)3.18 F F2(count)2.5 E F0(is 0, all lines are copied.)
-2.5 E F1<ad4f>144 456 Q F0(Be)22.52 E(gin assigning to)-.15 E F2(arr)
-2.83 E(ay)-.15 E F0(at inde)2.82 E(x)-.15 E F2(origin)2.5 E F0 5(.T).24
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-<ad73>144 468 Q F0(Discard the \214rst)26.41 E F2(count)2.5 E F0
-(lines read.)2.5 E F1<ad74>144 480 Q F0(Remo)26.97 E .3 -.15(ve a t)-.15
-H(railing ne).15 E(wline from each line read.)-.25 E F1<ad75>144 492 Q
-F0(Read lines from \214le descriptor)24.74 E F2(fd)2.5 E F0
-(instead of the standard input.)2.5 E F1<ad43>144 504 Q F0(Ev)23.08 E
+6.165 F F1(local)3.665 E F0 1.165(when not)3.665 F .233
+(within a function.)144 444 R .233(The return status is 0 unless)5.233 F
+F1(local)2.733 E F0 .233(is used outside a function, an in)2.733 F -.25
+(va)-.4 G(lid).25 E F2(name)3.092 E F0(is)2.912 E(supplied, or)144 456 Q
+F2(name)2.5 E F0(is a readonly v)2.5 E(ariable.)-.25 E F1(logout)108
+472.8 Q F0(Exit a login shell.)9.33 E F1(map\214le)108 489.6 Q F0([)2.5
+E F1<ad6e>A F2(count)2.5 E F0 2.5(][)C F1<ad4f>-2.5 E F2(origin)2.5 E F0
+2.5(][)C F1<ad73>-2.5 E F2(count)2.5 E F0 2.5(][)C F1<ad74>-2.5 E F0 2.5
+(][)C F1<ad75>-2.5 E F2(fd)2.5 E F0 2.5(][)C F1<ad43>-2.5 E F2(callbac)
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+(arr)-2.5 E(ay)-.15 E F0(])A F1 -.18(re)108 501.6 S(adarray).18 E F0([)
+2.5 E F1<ad6e>A F2(count)2.5 E F0 2.5(][)C F1<ad4f>-2.5 E F2(origin)2.5
+E F0 2.5(][)C F1<ad73>-2.5 E F2(count)2.5 E F0 2.5(][)C F1<ad74>-2.5 E
+F0 2.5(][)C F1<ad75>-2.5 E F2(fd)2.5 E F0 2.5(][)C F1<ad43>-2.5 E F2
+(callbac)2.5 E(k)-.2 E F0 2.5(][)C F1<ad63>-2.5 E F2(quantum)2.5 E F0
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+(Read lines from the standard input into the inde)144 513.6 R -.15(xe)
+-.15 G 2.851(da).15 G .351(rray v)-2.851 F(ariable)-.25 E F2(arr)2.851 E
+(ay)-.15 E F0 2.851(,o).32 G 2.851(rf)-2.851 G .351
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+R F1<ad75>3.749 E F0 1.249(option is supplied.)3.749 F 1.249(The v)6.249
+F(ariable)-.25 E F3(MAPFILE)3.749 E F0 1.249(is the def)3.499 F(ault)-.1
+E F2(arr)3.748 E(ay)-.15 E F0 6.248(.O)C 1.248(ptions, if supplied,)
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+E 2.5(xi)-.15 G 2.5(s0)-2.5 G(.)-2.5 E F1<ad73>144 573.6 Q F0
+(Discard the \214rst)26.41 E F2(count)2.5 E F0(lines read.)2.5 E F1
+<ad74>144 585.6 Q F0(Remo)26.97 E .3 -.15(ve a t)-.15 H(railing ne).15 E
+(wline from each line read.)-.25 E F1<ad75>144 597.6 Q F0
+(Read lines from \214le descriptor)24.74 E F2(fd)2.5 E F0
+(instead of the standard input.)2.5 E F1<ad43>144 609.6 Q F0(Ev)23.08 E
(aluate)-.25 E F2(callbac)2.7 E(k)-.2 E F0(each time)3.17 E F2(quantum)
2.5 E F0(lines are read.)2.5 E(The)5 E F1<ad63>2.5 E F0
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--.35 E 1.36(status is 0 unless an error occurs while reading the name o\
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-(option is supplied.)144 96 Q/F1 10/Times-Bold@0 SF -.18(re)108 112.8 S
-(ad).18 E F0([)3.817 E F1(\255ers)A F0 3.817(][)C F1<ad61>-3.817 E/F2 10
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-(delim)3.817 E F0 3.817(][)C F1<ad69>-3.817 E F2(te)3.817 E(xt)-.2 E F0
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-(][)C F1<ad4e>-3.816 E F2(nc)3.816 E(har)-.15 E(s)-.1 E F0 3.816(][)C F1
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-([)108 124.8 Q F2(name)A F0(...])2.5 E .516(One line is read from the s\
-tandard input, or from the \214le descriptor)144 136.8 R F2(fd)3.016 E
-F0 .516(supplied as an ar)3.016 F .516(gument to)-.18 F(the)144 148.8 Q
-F1<ad75>2.538 E F0 .038(option, and the \214rst w)2.538 F .038
-(ord is assigned to the \214rst)-.1 F F2(name)2.539 E F0 2.539(,t).18 G
-.039(he second w)-2.539 F .039(ord to the second)-.1 F F2(name)2.539 E
-F0(,).18 E .42(and so on, with lefto)144 160.8 R -.15(ve)-.15 G 2.92(rw)
-.15 G .42(ords and their interv)-3.02 F .42
-(ening separators assigned to the last)-.15 F F2(name)2.92 E F0 5.42(.I)
-.18 G 2.92(ft)-5.42 G(here)-2.92 E .54(are fe)144 172.8 R .54(wer w)-.25
-F .541(ords read from the input stream than names, the remaining names \
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-(characters in)2.511 F/F3 9/Times-Bold@0 SF(IFS)2.511 E F0 .011
+-.35 E/F1 10/Times-Italic@0 SF(dir)144.35 84 Q F0(Adds)23.98 E F1(dir)
+2.85 E F0(to the directory stack at the top, making it the ne)3.23 E 2.5
+(wc)-.25 G(urrent w)-2.5 E(orking directory)-.1 E(.)-.65 E .489(If the)
+144 100.8 R/F2 10/Times-Bold@0 SF(pushd)2.989 E F0 .489
+(command is successful, a)2.989 F F2(dirs)2.988 E F0 .488
+(is performed as well.)2.988 F .488(If the \214rst form is used,)5.488 F
+F2(pushd)2.988 E F0 1.039(returns 0 unless the cd to)144 112.8 R F1(dir)
+3.889 E F0 -.1(fa)4.269 G 3.539(ils. W).1 F 1.039(ith the second form,)
+-.4 F F2(pushd)3.54 E F0 1.04(returns 0 unless the directory)3.54 F .847
+(stack is empty)144 124.8 R 3.347(,an)-.65 G(on-e)-3.347 E .847(xistent\
+ directory stack element is speci\214ed, or the directory change to the)
+-.15 F(speci\214ed ne)144 136.8 Q 2.5(wc)-.25 G(urrent directory f)-2.5
+E(ails.)-.1 E F2(pwd)108 153.6 Q F0([)2.5 E F2(\255LP)A F0(])A .844
+(Print the absolute pathname of the current w)144 165.6 R .845
+(orking directory)-.1 F 5.845(.T)-.65 G .845
+(he pathname printed contains no)-5.845 F .182(symbolic links if the)144
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+.181(\255o ph)2.681 F(ysical)-.15 E F0 .181(option to the)2.681 F F2
+(set)2.681 E F0 -.2(bu)2.681 G .181(iltin command is).2 F 3.263
+(enabled. If)144 189.6 R(the)3.263 E F2<ad4c>3.263 E F0 .763
+(option is used, the pathname printed may contain symbolic links.)3.263
+F .764(The return)5.764 F 1.36(status is 0 unless an error occurs while\
+ reading the name of the current directory or an in)144 201.6 R -.25(va)
+-.4 G(lid).25 E(option is supplied.)144 213.6 Q F2 -.18(re)108 230.4 S
+(ad).18 E F0([)3.816 E F2(\255ers)A F0 3.816(][)C F2<ad61>-3.816 E F1
+(aname)3.816 E F0 3.816(][)C F2<ad64>-3.816 E F1(delim)3.816 E F0 3.816
+(][)C F2<ad69>-3.816 E F1(te)3.816 E(xt)-.2 E F0 3.816(][)C F2<ad6e>
+-3.816 E F1(nc)3.816 E(har)-.15 E(s)-.1 E F0 3.817(][)C F2<ad4e>-3.817 E
+F1(nc)3.817 E(har)-.15 E(s)-.1 E F0 3.817(][)C F2<ad70>-3.817 E F1(pr)
+3.817 E(ompt)-.45 E F0 3.817(][)C F2<ad74>-3.817 E F1(timeout)3.817 E F0
+3.817(][)C F2<ad75>-3.817 E F1(fd)3.817 E F0(])A([)108 242.4 Q F1(name)A
+F0(...])2.5 E .516(One line is read from the standard input, or from th\
+e \214le descriptor)144 254.4 R F1(fd)3.016 E F0 .516(supplied as an ar)
+3.016 F .517(gument to)-.18 F(the)144 266.4 Q F2<ad75>2.539 E F0 .039
+(option, and the \214rst w)2.539 F .038(ord is assigned to the \214rst)
+-.1 F F1(name)2.538 E F0 2.538(,t).18 G .038(he second w)-2.538 F .038
+(ord to the second)-.1 F F1(name)2.538 E F0(,).18 E .42
+(and so on, with lefto)144 278.4 R -.15(ve)-.15 G 2.92(rw).15 G .42
+(ords and their interv)-3.02 F .42
+(ening separators assigned to the last)-.15 F F1(name)2.92 E F0 5.42(.I)
+.18 G 2.92(ft)-5.42 G(here)-2.92 E .541(are fe)144 290.4 R .541(wer w)
+-.25 F .541(ords read from the input stream than names, the remaining n\
+ames are assigned empty)-.1 F -.25(va)144 302.4 S 2.51(lues. The).25 F
+.011(characters in)2.511 F/F3 9/Times-Bold@0 SF(IFS)2.511 E F0 .011
(are used to split the line into w)2.261 F 2.511(ords. The)-.1 F .011
-(backslash character \()2.511 F F1(\\)A F0 2.51(\)m)C(ay)-2.51 E 1.89
-(be used to remo)144 196.8 R 2.19 -.15(ve a)-.15 H 2.19 -.15(ny s).15 H
-1.891(pecial meaning for the ne).15 F 1.891
+(backslash character \()2.511 F F2(\\)A F0 2.511(\)m)C(ay)-2.511 E 1.891
+(be used to remo)144 314.4 R 2.191 -.15(ve a)-.15 H 2.191 -.15(ny s).15
+H 1.891(pecial meaning for the ne).15 F 1.89
(xt character read and for line continuation.)-.15 F
-(Options, if supplied, ha)144 208.8 Q .3 -.15(ve t)-.2 H(he follo).15 E
-(wing meanings:)-.25 E F1<ad61>144 220.8 Q F2(aname)2.5 E F0 1.05(The w)
-180 232.8 R 1.049
+(Options, if supplied, ha)144 326.4 Q .3 -.15(ve t)-.2 H(he follo).15 E
+(wing meanings:)-.25 E F2<ad61>144 338.4 Q F1(aname)2.5 E F0 1.049
+(The w)180 350.4 R 1.049
(ords are assigned to sequential indices of the array v)-.1 F(ariable)
--.25 E F2(aname)3.549 E F0 3.549(,s).18 G 1.049(tarting at 0.)-3.549 F
-F2(aname)180.33 244.8 Q F0(is unset before an)2.68 E 2.5(yn)-.15 G .5
--.25(ew va)-2.5 H(lues are assigned.).25 E(Other)5 E F2(name)2.5 E F0
-(ar)2.5 E(guments are ignored.)-.18 E F1<ad64>144 256.8 Q F2(delim)2.5 E
-F0(The \214rst character of)180 268.8 Q F2(delim)2.5 E F0
+-.25 E F1(aname)3.55 E F0 3.55(,s).18 G 1.05(tarting at 0.)-3.55 F F1
+(aname)180.33 362.4 Q F0(is unset before an)2.68 E 2.5(yn)-.15 G .5 -.25
+(ew va)-2.5 H(lues are assigned.).25 E(Other)5 E F1(name)2.5 E F0(ar)2.5
+E(guments are ignored.)-.18 E F2<ad64>144 374.4 Q F1(delim)2.5 E F0
+(The \214rst character of)180 386.4 Q F1(delim)2.5 E F0
(is used to terminate the input line, rather than ne)2.5 E(wline.)-.25 E
-F1<ad65>144 280.8 Q F0 .372
-(If the standard input is coming from a terminal,)25.86 F F1 -.18(re)
-2.873 G(adline).18 E F0(\(see)2.873 E F3(READLINE)2.873 E F0(abo)2.623 E
--.15(ve)-.15 G 2.873(\)i).15 G 2.873(su)-2.873 G(sed)-2.873 E .218
-(to obtain the line.)180 292.8 R .218
+F2<ad65>144 398.4 Q F0 .373
+(If the standard input is coming from a terminal,)25.86 F F2 -.18(re)
+2.873 G(adline).18 E F0(\(see)2.873 E F3(READLINE)2.872 E F0(abo)2.622 E
+-.15(ve)-.15 G 2.872(\)i).15 G 2.872(su)-2.872 G(sed)-2.872 E .218
+(to obtain the line.)180 410.4 R .218
(Readline uses the current \(or def)5.218 F .218
(ault, if line editing w)-.1 F .218(as not pre)-.1 F(viously)-.25 E
-(acti)180 304.8 Q -.15(ve)-.25 G 2.5(\)e).15 G(diting settings.)-2.5 E
-F1<ad69>144 316.8 Q F2(te)2.5 E(xt)-.2 E F0(If)10.78 E F1 -.18(re)2.715
-G(adline).18 E F0 .216(is being used to read the line,)2.715 F F2(te)
+(acti)180 422.4 Q -.15(ve)-.25 G 2.5(\)e).15 G(diting settings.)-2.5 E
+F2<ad69>144 434.4 Q F1(te)2.5 E(xt)-.2 E F0(If)10.78 E F2 -.18(re)2.716
+G(adline).18 E F0 .216(is being used to read the line,)2.716 F F1(te)
2.716 E(xt)-.2 E F0 .216(is placed into the editing b)2.716 F(uf)-.2 E
-.21
6(fer before edit-)-.25 F(ing be)180 328.8 Q(gins.)-.15 E F1<ad6e>144
-340.8 Q F2(nc)2.5 E(har)-.15 E(s)-.1 E F1 -.18(re)180 352.8 S(ad).18 E
-F0 1.395(returns after reading)3.895 F F2(nc)3.895 E(har)-.15 E(s)-.1 E
-F0 1.395(characters rather than w)3.895 F 1.394
-(aiting for a complete line of)-.1 F(input, b)180 364.8 Q
-(ut honor a delimiter if fe)-.2 E(wer than)-.25 E F2(nc)2.5 E(har)-.15 E
-(s)-.1 E F0(characters are read before the delimiter)2.5 E(.)-.55 E F1
-<ad4e>144 376.8 Q F2(nc)2.5 E(har)-.15 E(s)-.1 E F1 -.18(re)180 388.8 S
-(ad).18 E F0 1.269(returns after reading e)3.769 F(xactly)-.15 E F2(nc)
+.21
5(fer before edit-)-.25 F(ing be)180 446.4 Q(gins.)-.15 E F2<ad6e>144
+458.4 Q F1(nc)2.5 E(har)-.15 E(s)-.1 E F2 -.18(re)180 470.4 S(ad).18 E
+F0 1.394(returns after reading)3.894 F F1(nc)3.894 E(har)-.15 E(s)-.1 E
+F0 1.395(characters rather than w)3.894 F 1.395
+(aiting for a complete line of)-.1 F(input, b)180 482.4 Q
+(ut honor a delimiter if fe)-.2 E(wer than)-.25 E F1(nc)2.5 E(har)-.15 E
+(s)-.1 E F0(characters are read before the delimiter)2.5 E(.)-.55 E F2
+<ad4e>144 494.4 Q F1(nc)2.5 E(har)-.15 E(s)-.1 E F2 -.18(re)180 506.4 S
+(ad).18 E F0 1.269(returns after reading e)3.77 F(xactly)-.15 E F1(nc)
3.769 E(har)-.15 E(s)-.1 E F0 1.269(characters rather than w)3.769 F
-1.27(aiting for a complete)-.1 F .275
-(line of input, unless EOF is encountered or)180 400.8 R F1 -.18(re)
-2.775 G(ad).18 E F0 .274(times out.)2.774 F .274
-(Delimiter characters encoun-)5.274 F 1.002
-(tered in the input are not treated specially and do not cause)180 412.8
-R F1 -.18(re)3.503 G(ad).18 E F0 1.003(to return until)3.503 F F2(nc)
-3.50
3 E(har)-.15 E(s)-.1 E F0(characters are read.)180 424.8 Q F1<ad70>
-144 436.8 Q F2(pr)2.5 E(ompt)-.45 E F0(Display)180 448.8 Q F2(pr)3.661 E
-(ompt)-.45 E F0 1.161(on standard error)3.661 F 3.661(,w)-.4 G 1.161
+1.269(aiting for a complete)-.1 F .274
+(line of input, unless EOF is encountered or)180 518.4 R F2 -.18(re)
+2.775 G(ad).18 E F0 .275(times out.)2.775 F .275
+(Delimiter characters encoun-)5.275 F 1.003
+(tered in the input are not treated specially and do not cause)180 530.4
+R F2 -.18(re)3.502 G(ad).18 E F0 1.002(to return until)3.502 F F1(nc)
+3.50
2 E(har)-.15 E(s)-.1 E F0(characters are read.)180 542.4 Q F2<ad70>
+144 554.4 Q F1(pr)2.5 E(ompt)-.45 E F0(Display)180 566.4 Q F1(pr)3.66 E
+(ompt)-.45 E F0 1.161(on standard error)3.66 F 3.661(,w)-.4 G 1.161
(ithout a trailing ne)-3.661 F 1.161(wline, before attempting to read)
--.25 F(an)180 460.8 Q 2.5(yi)-.15 G 2.5(nput. The)-2.5 F
-(prompt is displayed only if input is coming from a terminal.)2.5 E F1
-<ad72>144 472.8 Q F0 .543(Backslash does not act as an escape character)
-25.86 F 5.543(.T)-.55 G .544(he backslash is considered to be part of)
--5.543 F(the line.)180 484.8 Q(In particular)5 E 2.5(,ab)-.4 G
+-.25 F(an)180 578.4 Q 2.5(yi)-.15 G 2.5(nput. The)-2.5 F
+(prompt is displayed only if input is coming from a terminal.)2.5 E F2
+<ad72>144 590.4 Q F0 .544(Backslash does not act as an escape character)
+25.86 F 5.543(.T)-.55 G .543(he backslash is considered to be part of)
+-5.543 F(the line.)180 602.4 Q(In particular)5 E 2.5(,ab)-.4 G
(ackslash-ne)-2.5 E(wline pair may not be used as a line continuation.)
--.25 E F1<ad73>144 496.8 Q F0(Silent mode.)26.41 E
-(If input is coming from a terminal, characters are not echoed.)5 E F1
-<ad74>144 508.8 Q F2(timeout)2.5 E F0(Cause)180 520.8 Q F1 -.18(re)3.549
-G(ad).18 E F0 1.048(to time out and return f)3.549 F 1.048
-(ailure if a complete line of input is not read within)-.1 F F2(timeout)
-180 532.8 Q F0(seconds.)3.496 E F2(timeout)5.996 E F0 .997
-(may be a decimal number with a fractional portion follo)3.496 F(wing)
--.25 E .576(the decimal point.)180 544.8 R .576(This option is only ef)
-5.576 F(fecti)-.25 E .876 -.15(ve i)-.25 H(f).15 E F1 -.18(re)3.076 G
-(ad).18 E F0 .576(is reading input from a terminal,)3.076 F .141
-(pipe, or other special \214le; it has no ef)180 556.8 R .142
-(fect when reading from re)-.25 F .142(gular \214les.)-.15 F(If)5.142 E
-F2(timeout)2.642 E F0 .142(is 0,)2.642 F F1 -.18(re)180 568.8 S(ad).18 E
-F0 .113(returns success if input is a)2.614 F -.25(va)-.2 G .113
-(ilable on the speci\214ed \214le descriptor).25 F 2.613(,f)-.4 G .113
-(ailure otherwise.)-2.713 F(The e)180 580.8 Q
+-.25 E F2<ad73>144 614.4 Q F0(Silent mode.)26.41 E
+(If input is coming from a terminal, characters are not echoed.)5 E F2
+<ad74>144 626.4 Q F1(timeout)2.5 E F0(Cause)180 638.4 Q F2 -.18(re)3.548
+G(ad).18 E F0 1.048(to time out and return f)3.548 F 1.048
+(ailure if a complete line of input is not read within)-.1 F F1(timeout)
+180 650.4 Q F0(seconds.)3.497 E F1(timeout)5.997 E F0 .997
+(may be a decimal number with a fractional portion follo)3.497 F(wing)
+-.25 E .576(the decimal point.)180 662.4 R .576(This option is only ef)
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+(pipe, or other special \214le; it has no ef)180 674.4 R .142
+(fect when reading from re)-.25 F .142(gular \214les.)-.15 F(If)5.141 E
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+F0 .113(returns success if input is a)2.613 F -.25(va)-.2 G .113
+(ilable on the speci\214ed \214le descriptor).25 F 2.613(,f)-.4 G .114
+(ailure otherwise.)-2.713 F(The e)180 698.4 Q
(xit status is greater than 128 if the timeout is e)-.15 E(xceeded.)-.15
-E F1<ad75>144 592.8 Q F2(fd)2.5 E F0(Read input from \214le descriptor)
-14.46 E F2(fd)2.5 E F0(.)A .191(If no)144 609.6 R F2(names)3.051 E F0
-.191(are supplied, the line read is assigned to the v)2.961 F(ariable)
--.25 E F3(REPL)2.692 E(Y)-.828 E/F4 9/Times-Roman@0 SF(.)A F0 .192
-(The return code is zero,)4.692 F 1.344
-(unless end-of-\214le is encountered,)144 621.6 R F1 -.18(re)3.844 G(ad)
-.18 E F0 1.343
-(times out \(in which case the return code is greater than)3.844 F
-(128\), or an in)144 633.6 Q -.25(va)-.4 G
+E F2<ad75>144 710.4 Q F1(fd)2.5 E F0(Read input from \214le descriptor)
+14.46 E F1(fd)2.5 E F0(.)A .192(If no)144 727.2 R F1(names)3.052 E F0
+.192(are supplied, the line read is assigned to the v)2.962 F(ariable)
+-.25 E F3(REPL)2.691 E(Y)-.828 E/F4 9/Times-Roman@0 SF(.)A F0 .191
+(The return code is zero,)4.691 F(GNU Bash-4.2)72 768 Q
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+/Times-Bold@0 SF -.18(re)3.843 G(ad).18 E F0 1.343
+(times out \(in which case the return code is greater than)3.843 F
+(128\), or an in)144 96 Q -.25(va)-.4 G
(lid \214le descriptor is supplied as the ar).25 E(gument to)-.18 E F1
-<ad75>2.5 E F0(.)A F1 -.18(re)108 650.4 S(adonly).18 E F0([)2.5 E F1
-(\255aA)A(pf)-.25 E F0 2.5(][)C F2(name)-2.5 E F0([=)A F2(wor)A(d)-.37 E
-F0 2.5(].)C(..])-2.5 E .77(The gi)144 662.4 R -.15(ve)-.25 G(n).15 E F2
-(names)3.27 E F0 .77(are mark)3.27 F .77(ed readonly; the v)-.1 F .77
-(alues of these)-.25 F F2(names)3.63 E F0 .77
-(may not be changed by subse-)3.54 F 1.097(quent assignment.)144 674.4 R
-1.097(If the)6.097 F F1<ad66>3.597 E F0 1.097
-(option is supplied, the functions corresponding to the)3.597 F F2
-(names)3.596 E F0 1.096(are so)3.596 F(mark)144 686.4 Q 3.334(ed. The)
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+([=)A F2(wor)A(d)-.37 E F0 2.5(].)C(..])-2.5 E .77(The gi)144 124.8 R
+-.15(ve)-.25 G(n).15 E F2(names)3.27 E F0 .77(are mark)3.27 F .77
+(ed readonly; the v)-.1 F .77(alues of these)-.25 F F2(names)3.63 E F0
+.77(may not be changed by subse-)3.54 F 1.096(quent assignment.)144
+136.8 R 1.096(If the)6.096 F F1<ad66>3.596 E F0 1.097
+(option is supplied, the functions corresponding to the)3.596 F F2
+(names)3.597 E F0 1.097(are so)3.597 F(mark)144 148.8 Q 3.334(ed. The)
-.1 F F1<ad61>3.334 E F0 .834(option restricts the v)3.334 F .834
(ariables to inde)-.25 F -.15(xe)-.15 G 3.334(da).15 G .834(rrays; the)
-3.334 F F1<ad41>3.334 E F0 .834(option restricts the v)3.334 F(ari-)
--.25 E .538(ables to associati)144 698.4 R .838 -.15(ve a)-.25 H 3.038
+-.25 E .537(ables to associati)144 160.8 R .837 -.15(ve a)-.25 H 3.037
(rrays. If).15 F(no)3.038 E F2(name)3.398 E F0(ar)3.218 E .538
(guments are gi)-.18 F -.15(ve)-.25 G .538(n, or if the).15 F F1<ad70>
-3.038 E F0 .537(option is supplied, a list)3.038 F .08
-(of all readonly names is printed.)144 710.4 R(The)5.08 E F1<ad70>2.58 E
-F0 .081(option causes output to be displayed in a format that may)2.58 F
-1.177(be reused as input.)144 722.4 R 1.177(If a v)6.177 F 1.176
+3.038 E F0 .538(option is supplied, a list)3.038 F .081
+(of all readonly names is printed.)144 172.8 R(The)5.081 E F1<ad70>2.581
+E F0 .08(option causes output to be displayed in a format that may)2.581
+F 1.176(be reused as input.)144 184.8 R 1.176(If a v)6.176 F 1.176
(ariable name is follo)-.25 F 1.176(wed by =)-.25 F F2(wor)A(d)-.37 E F0
-3.676(,t)C 1.176(he v)-3.676 F 1.176(alue of the v)-.25 F 1.176
-(ariable is set to)-.25 F(GNU Bash-4.2)72 768 Q(2010 December 6)138.465
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264 Q(ber)-.1 E F0(Same as)224 276 Q F1<ad43>2.5 E
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288 Q F0(Same as)11.12 E F1<ad6e>2.5 E F0(.)A F1
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300 Q F0(Same as)11.1 E F1<ad66>2.5 E F0(.)A F1(nolog)184
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336 Q F0(Same as)6.66 E F1<ad75>2.5
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348 Q F0(Same as)6.67 E F1<ad74>2.5 E F0(.)A F1
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360 Q(ysical)-.15 E F0(Same as)5.14 E F1<ad50>2.5 E F0(.)A F1
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360 Q F0(Same as)5.56 E F1<ad6d>2.5 E
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372 Q(ber)-.1 E F0(Same as)224 384 Q F1<ad43>2.5 E
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396 Q F0(Same as)11.12 E F1<ad6e>2.5 E F0(.)A F1
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408 Q F0(Same as)11.1 E F1<ad66>2.5 E F0(.)A F1(nolog)184
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444 Q F0(Same as)6.66 E F1<ad75>2.5
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456 Q F0(Same as)6.67 E F1<ad74>2.5 E F0(.)A F1
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468 Q(ysical)-.15 E F0(Same as)5.14 E F1<ad50>2.5 E F0(.)A F1
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--.1 E F0(Same as)224 444 Q F1<ad70>2.5 E F0(.)A F1 -.1(ve)184 456 S
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-.15 F F1($#)2.583 E F0 5.083(.I)C(f)-5.083 E F2(n)2.943 E F0 .06
-(is 0, no parameters are changed.)144 453.6 R(If)5.06 E F2(n)2.92 E F0
+(ys true unless an in).1 F -.25(va)-.4 G .066(lid option).25 F
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-(,t)C(he)-2.56 E .143(positional parameters are not changed.)144 465.6 R
-.144(The return status is greater than zero if)5.143 F F2(n)3.004 E F0
-.144(is greater than)2.884 F F1($#)2.644 E F0
-(or less than zero; otherwise 0.)144 477.6 Q F1(shopt)108 494.4 Q F0([)
+(,t)C(he)-2.56 E .144(positional parameters are not changed.)144 573.6 R
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+(or less than zero; otherwise 0.)144 585.6 Q F1(shopt)108 602.4 Q F0([)
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--2.5 E F0(...])2.5 E -.8(To)144 506.4 S .222(ggle the v).8 F .222
+-2.5 E F0(...])2.5 E -.8(To)144 614.4 S .222(ggle the v).8 F .222
(alues of v)-.25 F .222(ariables controlling optional shell beha)-.25 F
(vior)-.2 E 5.222(.W)-.55 G .222(ith no options, or with the)-5.622 F F1
<ad70>2.722 E F0 .721(option, a list of all settable options is display\
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-144 530.4 Q F1<ad70>2.828 E F0 .327(option causes output to be displaye\
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-5.327 F(ha)144 542.4 Q .3 -.15(ve t)-.2 H(he follo).15 E(wing meanings:)
--.25 E F1<ad73>144 554.4 Q F0(Enable \(set\) each)26.41 E F2(optname)2.5
-E F0(.)A F1<ad75>144 566.4 Q F0(Disable \(unset\) each)24.74 E F2
-(optname)2.5 E F0(.)A F1<ad71>144 578.4 Q F0 .003(Suppresses normal out\
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put \(quiet mode\); the return status indicates whether the)24.74 F F2
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(If set, a command name that is the name of a directory is e)11.11 F
--.15(xe)-.15 G .2(cuted as if it were the ar).15 F(gu-)-.18 E
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1.055
(If set, minor errors in the spelling of a directory component in a)
-10.55 F F1(cd)3.555 E F0 1.055(command will be)3.555 F 3.988
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-(If set,)184 204 R F1(bash)4.58 E F0 2.079
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-(xists, a normal path search is performed.)-.15 E F1(checkjobs)144 228 Q
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+(xists, a normal path search is performed.)-.15 E F1(checkjobs)144 344.4
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(ll lines of a multiple-line command in the same history).15 F(entry)184
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--.25(ev e)184 504 T 2.949(nn).25 G .448(umber\) and the characters betw\
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-(vior remains as)-.2 F(in pre)184 528 Q(vious v)-.25 E(ersions.)-.15 E
-F1(dirspell)144 540 Q F0 .859(If set,)7.77 F F1(bash)3.359 E F0 .858
-(attempts spelling correction on directory names during w)3.359 F .858
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+(ws easy re-editing of multi-line commands.)-.25 E F1(compat31)144 464.4
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(ord completion if)-.1 F
-(the directory name initially supplied does not e)184 552 Q(xist.)-.15 E
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+(the directory name initially supplied does not e)184 692.4 Q(xist.)-.15
+E F1(dotglob)144 704.4 Q F0 .165(If set,)7.77 F F1(bash)2.665 E F0 .165
(includes \214lenames be)2.665 F .165(ginning with a `.)-.15 F 2.665('i)
-.7 G 2.665(nt)-2.665 G .165(he results of pathname e)-2.665 F
-(xpansion.)-.15 E F1(execfail)144 576 Q F0 1.387
-(If set, a non-interacti)7.79 F 1.687 -.15(ve s)-.25 H 1.386
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+(If set, a non-interacti)7.79 F 1.686 -.15(ve s)-.25 H 1.386
(hell will not e).15 F 1.386(xit if it cannot e)-.15 F -.15(xe)-.15 G
-1.386(cute the \214le speci\214ed as an).15 F(ar)184 588 Q
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(gument to the)-.18 E F1(exec)2.5 E F0 -.2(bu)2.5 G(iltin command.).2 E
(An interacti)5 E .3 -.15(ve s)-.25 H(hell does not e).15 E(xit if)-.15
-E F1(exec)2.5 E F0 -.1(fa)2.5 G(ils.).1 E F1(expand_aliases)144 600 Q F0
-.716(If set, aliases are e)184 612 R .717(xpanded as described abo)-.15
-F 1.017 -.15(ve u)-.15 H(nder).15 E F2(ALIASES)3.217 E F3(.)A F0 .717
-(This option is enabled)5.217 F(by def)184 624 Q(ault for interacti)-.1
-E .3 -.15(ve s)-.25 H(hells.).15 E F1(extdeb)144 636 Q(ug)-.2 E F0
-(If set, beha)184 648 Q(vior intended for use by deb)-.2 E
-(uggers is enabled:)-.2 E F1(1.)184 660 Q F0(The)28.5 E F1<ad46>4.251 E
-F0 1.751(option to the)4.251 F F1(declar)4.251 E(e)-.18 E F0 -.2(bu)
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-(number corresponding to each function name supplied as an ar)220 672 Q
-(gument.)-.18 E F1(2.)184 684 Q F0 1.667(If the command run by the)28.5
-F F1(DEB)4.167 E(UG)-.1 E F0 1.667(trap returns a non-zero v)4.167 F
-1.667(alue, the ne)-.25 F(xt)-.15 E(command is skipped and not e)220 696
-Q -.15(xe)-.15 G(cuted.).15 E F1(3.)184 708 Q F0 .841
-(If the command run by the)28.5 F F1(DEB)3.341 E(UG)-.1 E F0 .841
-(trap returns a v)3.341 F .84(alue of 2, and the shell is)-.25 F -.15
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+F4<ad64>144 525.6 Q F0(The maximum size of a process')24.74 E 2.5(sd)
+-.55 G(ata se)-2.5 E(gment)-.15 E F4<ad65>144 537.6 Q F0
+(The maximum scheduling priority \("nice"\))25.86 E F4<ad66>144 549.6 Q
F0(The maximum size of \214les written by the shell and its children)
-26.97 E F1<ad69>144 436.8 Q F0(The maximum number of pending signals)
-27.52 E F1<ad6c>144 448.8 Q F0(The maximum size that may be lock)27.52 E
-(ed into memory)-.1 E F1<ad6d>144 460.8 Q F0
+26.97 E F4<ad69>144 561.6 Q F0(The maximum number of pending signals)
+27.52 E F4<ad6c>144 573.6 Q F0(The maximum size that may be lock)27.52 E
+(ed into memory)-.1 E F4<ad6d>144 585.6 Q F0
(The maximum resident set size \(man)21.97 E 2.5(ys)-.15 G
-(ystems do not honor this limit\))-2.5 E F1<ad6e>144 472.8 Q F0 .791(Th\
+(ystems do not honor this limit\))-2.5 E F4<ad6e>144 597.6 Q F0 .791(Th\
e maximum number of open \214le descriptors \(most systems do not allo)
-24.74 F 3.291(wt)-.25 G .791(his v)-3.291 F .791(alue to)-.25 F
-(be set\))180 484.8 Q F1<ad70>144 496.8 Q F0
-(The pipe size in 512-byte blocks \(this may not be set\))24.74 E F1
-<ad71>144 508.8 Q F0
-(The maximum number of bytes in POSIX message queues)24.74 E F
1<ad72>144
-
520.8 Q F0(The maximum real-time scheduling priority)25.86 E F1<ad73>144
-532.8 Q F0(The maximum stack size)26.41 E F1<ad74>144 544.8 Q F0
-(The maximum amount of cpu time in seconds)26.97 E F1<ad75>144 556.8 Q
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+609.6 Q F4<ad70>144 621.6 Q F0
+(The pipe size in 512-byte blocks \(this may not be set\))24.74 E F4
+<ad71>144 633.6 Q F0
+(The maximum number of bytes in POSIX message queues)24.74 E F
4<ad72>144
+
645.6 Q F0(The maximum real-time scheduling priority)25.86 E F4<ad73>144
+657.6 Q F0(The maximum stack size)26.41 E F4<ad74>144 669.6 Q F0
+(The maximum amount of cpu time in seconds)26.97 E F4<ad75>144 681.6 Q
F0(The maximum number of processes a)24.74 E -.25(va)-.2 G
-(ilable to a single user).25 E F1<ad76>144 568.8 Q F0 .47
+(ilable to a single user).25 E F4<ad76>144 693.6 Q F0 .47
(The maximum amount of virtual memory a)25.3 F -.25(va)-.2 G .47
(ilable to the shell and, on some systems, to).25 F(its children)180
-580.8 Q F1<ad78>144 592.8 Q F0(The maximum number of \214le locks)25.3 E
-F1<ad54>144 604.8 Q F0(The maximum number of threads)23.63 E(If)144
-621.6 Q F2(limit)2.933 E F0 .343(is gi)3.523 F -.15(ve)-.25 G .343
-(n, it is the ne).15 F 2.843(wv)-.25 G .343
+705.6 Q F4<ad78>144 717.6 Q F0(The maximum number of \214le locks)25.3 E
+(GNU Bash-4.2)72 768 Q(2010 December 28)135.965 E(69)185.955 E 0 Cg EP
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+(The maximum number of threads)23.63 E(If)144 100.8 Q/F2 10
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(alue of the speci\214ed resource \(the)-3.093 F F1<ad61>2.843 E F0 .343
-(option is display only\).)2.843 F .343(If no)5.343 F .176(option is gi)
-144 633.6 R -.15(ve)-.25 G .176(n, then).15 F F1<ad66>2.676 E F0 .175
-(is assumed.)2.676 F -1.11(Va)5.175 G .175
-(lues are in 1024-byte increments, e)1.11 F .175(xcept for)-.15 F F1
-<ad74>2.675 E F0 2.675(,w)C .175(hich is in)-2.675 F(seconds,)144 645.6
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-(hich is in units of 512-byte blocks, and)-2.51
5 F F1<ad54>2.516 E F0(,)
-A F1<ad62>2.516 E F0(,)A F1<ad6e>2.516 E F0 2.516(,a)C(nd)-2.516 E F1
-<ad75>2.516 E F0 2.516(,w)C .016(hich are unscaled v)-2.516 F(al-)-.25 E
-3.788(ues. The)144 657.6 R 1.287(return status is 0 unless an in)3.787 F
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+(is assumed.)2.675 F -1.11(Va)5.175 G .175
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+(hich is in units of 512-byte blocks, and)-2.51
6 F F1<ad54>2.516 E F0(,)
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+3.787(ues. The)144 136.8 R 1.287(return status is 0 unless an in)3.787 F
-.25(va)-.4 G 1.287(lid option or ar).25 F 1.287
(gument is supplied, or an error occurs)-.18 F(while setting a ne)144
-669.6 Q 2.5(wl)-.25 G(imit.)-2.5 E F1(umask)108 686.4 Q F0([)2.5 E F1
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<ad70>A F0 2.5(][)C F1<ad53>-2.5 E F0 2.5(][)C F2(mode)-2.5 E F0(])A .2
-(The user \214le-creation mask is set to)144 698.4 R F2(mode)2.7 E F0
+(The user \214le-creation mask is set to)144 177.6 R F2(mode)2.7 E F0
5.2(.I).18 G(f)-5.2 E F2(mode)3.08 E F0(be)2.88 E .2
(gins with a digit, it is interpreted as an octal)-.15 F .066(number; o\
therwise it is interpreted as a symbolic mode mask similar to that acce\
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+pted by)144 189.6 R F2 -.15(ch)2.566 G(mod).15 E F0(\(1\).).77 E(If)144
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(alue of the mask is printed.)-.25 F(The)5.382 E F1<ad53>2.882 E F0 .382
-(option causes the mask to be)2.882 F(GNU Bash-4.2)72 768 Q
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-/F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\))
--.35 E .547(printed in symbolic form; the def)144 84 R .547
+(option causes the mask to be)2.882 F .547
+(printed in symbolic form; the def)144 213.6 R .547
(ault output is an octal number)-.1 F 5.547(.I)-.55 G 3.047(ft)-5.547 G
-(he)-3.047 E/F1 10/Times-Bold@0 SF<ad70>3.047 E F0 .547
-(option is supplied, and)3.047 F/F2 10/Times-Italic@0 SF(mode)144.38 96
-Q F0 .551
-(is omitted, the output is in a form that may be reused as input.)3.231
-F .552(The return status is 0 if the)5.552 F(mode w)144 108 Q
+(he)-3.047 E F1<ad70>3.047 E F0 .547(option is supplied, and)3.047 F F2
+(mode)144.38 225.6 Q F0 .552
+(is omitted, the output is in a form that may be reused as input.)3.232
+F .551(The return status is 0 if the)5.551 F(mode w)144 237.6 Q
(as successfully changed or if no)-.1 E F2(mode)2.5 E F0(ar)2.5 E
(gument w)-.18 E(as supplied, and f)-.1 E(alse otherwise.)-.1 E F1
-(unalias)108 124.8 Q F0<5bad>2.5 E F1(a)A F0 2.5(][)C F2(name)-2.5 E F0
-(...])2.5 E(Remo)144 136.8 Q 1.955 -.15(ve e)-.15 H(ach).15 E F2(name)
+(unalias)108 254.4 Q F0<5bad>2.5 E F1(a)A F0 2.5(][)C F2(name)-2.5 E F0
+(...])2.5 E(Remo)144 266.4 Q 1.955 -.15(ve e)-.15 H(ach).15 E F2(name)
4.155 E F0 1.655(from the list of de\214ned aliases.)4.155 F(If)6.655 E
F1<ad61>4.155 E F0 1.655(is supplied, all alias de\214nitions are)4.155
-F(remo)144 148.8 Q -.15(ve)-.15 G 2.5(d. The).15 F(return v)2.5 E
+F(remo)144 278.4 Q -.15(ve)-.15 G 2.5(d. The).15 F(return v)2.5 E
(alue is true unless a supplied)-.25 E F2(name)2.86 E F0
-(is not a de\214ned alias.)2.68 E F1(unset)108 165.6 Q F0<5bad>2.5 E F1
-(fv)A F0 2.5(][)C F2(name)-2.5 E F0(...])2.5 E -.15(Fo)144 177.6 S 3.106
-(re).15 G(ach)-3.106 E F2(name)3.106 E F0 3.106(,r).18 G(emo)-3.106 E
-.906 -.15(ve t)-.15 H .606(he corresponding v).15 F .607
-(ariable or function.)-.25 F .607(If no options are supplied, or the)
-5.607 F F1<ad76>144 189.6 Q F0 .305(option is gi)2.805 F -.15(ve)-.25 G
-.305(n, each).15 F F2(name)3.165 E F0 .305(refers to a shell v)2.985 F
-2.805(ariable. Read-only)-.25 F -.25(va)2.805 G .304
-(riables may not be unset.).25 F(If)5.304 E F1<ad66>144 201.6 Q F0 .459
-(is speci\214ed, each)2.959 F F2(name)3.319 E F0 .459
-(refers to a shell function, and the function de\214nition is remo)3.139
-F -.15(ve)-.15 G 2.96(d. Each).15 F .903(unset v)144 213.6 R .903
+(is not a de\214ned alias.)2.68 E F1(unset)108 295.2 Q F0<5bad>2.5 E F1
+(fv)A F0 2.5(][)C F2(name)-2.5 E F0(...])2.5 E -.15(Fo)144 307.2 S 3.107
+(re).15 G(ach)-3.107 E F2(name)3.107 E F0 3.107(,r).18 G(emo)-3.107 E
+.907 -.15(ve t)-.15 H .607(he corresponding v).15 F .607
+(ariable or function.)-.25 F .606(If no options are supplied, or the)
+5.607 F F1<ad76>144 319.2 Q F0 .304(option is gi)2.804 F -.15(ve)-.25 G
+.304(n, each).15 F F2(name)3.164 E F0 .305(refers to a shell v)2.985 F
+2.805(ariable. Read-only)-.25 F -.25(va)2.805 G .305
+(riables may not be unset.).25 F(If)5.305 E F1<ad66>144 331.2 Q F0 .46
+(is speci\214ed, each)2.96 F F2(name)3.32 E F0 .459
+(refers to a shell function, and the function de\214nition is remo)3.14
+F -.15(ve)-.15 G 2.959(d. Each).15 F .902(unset v)144 343.2 R .902
(ariable or function is remo)-.25 F -.15(ve)-.15 G 3.402(df).15 G .902
-(rom the en)-3.402 F .902(vironment passed to subsequent commands.)-.4 F
-(If)5.902 E(an)144 225.6 Q 6.915(yo)-.15 G(f)-6.915 E/F3 9/Times-Bold@0
-SF(COMP_W)6.915 E(ORDBREAKS)-.09 E/F4 9/Times-Roman@0 SF(,)A F3(RANDOM)
+(rom the en)-3.402 F .903(vironment passed to subsequent commands.)-.4 F
+(If)5.903 E(an)144 355.2 Q 6.916(yo)-.15 G(f)-6.916 E/F3 9/Times-Bold@0
+SF(COMP_W)6.916 E(ORDBREAKS)-.09 E/F4 9/Times-Roman@0 SF(,)A F3(RANDOM)
6.665 E F4(,)A F3(SECONDS)6.665 E F4(,)A F3(LINENO)6.665 E F4(,)A F3
-(HISTCMD)6.666 E F4(,)A F3(FUNCN)6.666 E(AME)-.18 E F4(,)A F3(GR)144
-237.6 Q(OUPS)-.27 E F4(,)A F0(or)2.523 E F3(DIRST)2.773 E -.495(AC)-.81
+(HISTCMD)6.665 E F4(,)A F3(FUNCN)6.665 E(AME)-.18 E F4(,)A F3(GR)144
+367.2 Q(OUPS)-.27 E F4(,)A F0(or)2.522 E F3(DIRST)2.772 E -.495(AC)-.81
G(K).495 E F0 .272(are unset, the)2.522 F 2.772(yl)-.15 G .272
(ose their special properties, e)-2.772 F -.15(ve)-.25 G 2.772(ni).15 G
-2.772(ft)-2.772 G(he)-2.772 E 2.772(ya)-.15 G .272(re subsequently)
--2.772 F 2.5(reset. The)144 249.6 R -.15(ex)2.5 G
+2.772(ft)-2.772 G(he)-2.772 E 2.773(ya)-.15 G .273(re subsequently)
+-2.773 F 2.5(reset. The)144 379.2 R -.15(ex)2.5 G
(it status is true unless a).15 E F2(name)2.86 E F0(is readonly)2.68 E
-(.)-.65 E F1(wait)108 266.4 Q F0([)2.5 E F2 2.5(n.)C(..)-2.5 E F0(])A
--.8(Wa)144 278.4 S .288
+(.)-.65 E F1(wait)108 396 Q F0([)2.5 E F2 2.5(n.)C(..)-2.5 E F0(])A -.8
+(Wa)144 408 S .288
(it for each speci\214ed process and return its termination status.).8 F
-(Each)5.288 E F2(n)3.148 E F0 .288(may be a process ID or a)3.028 F .722
-(job speci\214cation; if a job spec is gi)144 290.4 R -.15(ve)-.25 G
-.722(n, all processes in that job').15 F 3.222(sp)-.55 G .722
-(ipeline are w)-3.222 F .722(aited for)-.1 F 5.722(.I)-.55 G(f)-5.722 E
-F2(n)3.582 E F0(is)3.462 E 1.265(not gi)144 302.4 R -.15(ve)-.25 G 1.265
-(n, all currently acti).15 F 1.565 -.15(ve c)-.25 H 1.265
-(hild processes are w).15 F 1.265(aited for)-.1 F 3.765(,a)-.4 G 1.266
-(nd the return status is zero.)-3.765 F(If)6.266 E F2(n)4.126 E F0 .457
-(speci\214es a non-e)144 314.4 R .457
+(Each)5.288 E F2(n)3.148 E F0 .287(may be a process ID or a)3.028 F .722
+(job speci\214cation; if a job spec is gi)144 420 R -.15(ve)-.25 G .722
+(n, all processes in that job').15 F 3.222(sp)-.55 G .722(ipeline are w)
+-3.222 F .722(aited for)-.1 F 5.722(.I)-.55 G(f)-5.722 E F2(n)3.583 E F0
+(is)3.463 E 1.266(not gi)144 432 R -.15(ve)-.25 G 1.266
+(n, all currently acti).15 F 1.566 -.15(ve c)-.25 H 1.265
+(hild processes are w).15 F 1.265(aited for)-.1 F 3.765(,a)-.4 G 1.265
+(nd the return status is zero.)-3.765 F(If)6.265 E F2(n)4.125 E F0 .456
+(speci\214es a non-e)144 444 R .457
(xistent process or job, the return status is 127.)-.15 F .457
-(Otherwise, the return status is the)5.457 F -.15(ex)144 326.4 S
+(Otherwise, the return status is the)5.457 F -.15(ex)144 456 S
(it status of the last process or job w).15 E(aited for)-.1 E(.)-.55 E
-/F5 10.95/Times-Bold@0 SF(RESTRICTED SHELL)72 343.2 Q F0(If)108 355.2 Q
-F1(bash)4.396 E F0 1.896(is started with the name)4.396 F F1(rbash)4.397
-E F0 4.397(,o)C 4.397(rt)-4.397 G(he)-4.397 E F1<ad72>4.397 E F0 1.897
-(option is supplied at in)4.397 F -.2(vo)-.4 G 1.897
-(cation, the shell becomes).2 F 3.446(restricted. A)108 367.2 R .945
-(restricted shell is used to set up an en)3.446 F .945
-(vironment more controlled than the standard shell.)-.4 F(It)5.945 E
-(beha)108 379.2 Q -.15(ve)-.2 G 2.5(si).15 G(dentically to)-2.5 E F1
+/F5 10.95/Times-Bold@0 SF(RESTRICTED SHELL)72 472.8 Q F0(If)108 484.8 Q
+F1(bash)4.397 E F0 1.897(is started with the name)4.397 F F1(rbash)4.397
+E F0 4.397(,o)C 4.397(rt)-4.397 G(he)-4.397 E F1<ad72>4.397 E F0 1.896
+(option is supplied at in)4.397 F -.2(vo)-.4 G 1.896
+(cation, the shell becomes).2 F 3.445(restricted. A)108 496.8 R .945
+(restricted shell is used to set up an en)3.445 F .946
+(vironment more controlled than the standard shell.)-.4 F(It)5.946 E
+(beha)108 508.8 Q -.15(ve)-.2 G 2.5(si).15 G(dentically to)-2.5 E F1
(bash)2.5 E F0(with the e)2.5 E(xception that the follo)-.15 E
-(wing are disallo)-.25 E(wed or not performed:)-.25 E 32.5<8363>108 396
-S(hanging directories with)-32.5 E F1(cd)2.5 E F0 32.5<8373>108 412.8 S
-(etting or unsetting the v)-32.5 E(alues of)-.25 E F3(SHELL)2.5 E F4(,)A
-F3 -.666(PA)2.25 G(TH)-.189 E F4(,)A F3(ENV)2.25 E F4(,)A F0(or)2.25 E
-F3 -.27(BA)2.5 G(SH_ENV).27 E F0 32.5<8373>108 429.6 S
+(wing are disallo)-.25 E(wed or not performed:)-.25 E 32.5<8363>108
+525.6 S(hanging directories with)-32.5 E F1(cd)2.5 E F0 32.5<8373>108
+542.4 S(etting or unsetting the v)-32.5 E(alues of)-.25 E F3(SHELL)2.5 E
+F4(,)A F3 -.666(PA)2.25 G(TH)-.189 E F4(,)A F3(ENV)2.25 E F4(,)A F0(or)
+2.25 E F3 -.27(BA)2.5 G(SH_ENV).27 E F0 32.5<8373>108 559.2 S
(pecifying command names containing)-32.5 E F1(/)2.5 E F0 32.5<8373>108
-446.4 S(pecifying a \214le name containing a)-32.5 E F1(/)2.5 E F0
+576 S(pecifying a \214le name containing a)-32.5 E F1(/)2.5 E F0
(as an ar)2.5 E(gument to the)-.18 E F1(.)2.5 E F0 -.2(bu)5 G
-(iltin command).2 E 32.5<8373>108 463.2 S .449
+(iltin command).2 E 32.5<8373>108 592.8 S .45
(pecifying a \214lename containing a slash as an ar)-32.5 F .449
-(gument to the)-.18 F F1<ad70>2.95 E F0 .45(option to the)2.95 F F1
-(hash)2.95 E F0 -.2(bu)2.95 G .45(iltin com-).2 F(mand)144 475.2 Q 32.5
-<8369>108 492 S(mporting function de\214nitions from the shell en)-32.5
-E(vironment at startup)-.4 E 32.5<8370>108 508.8 S(arsing the v)-32.5 E
-(alue of)-.25 E F3(SHELLOPTS)2.5 E F0(from the shell en)2.25 E
-(vironment at startup)-.4 E 32.5<8372>108 525.6 S(edirecting output usi\
+(gument to the)-.18 F F1<ad70>2.949 E F0 .449(option to the)2.949 F F1
+(hash)2.949 E F0 -.2(bu)2.949 G .449(iltin com-).2 F(mand)144 604.8 Q
+32.5<8369>108 621.6 S(mporting function de\214nitions from the shell en)
+-32.5 E(vironment at startup)-.4 E 32.5<8370>108 638.4 S(arsing the v)
+-32.5 E(alue of)-.25 E F3(SHELLOPTS)2.5 E F0(from the shell en)2.25 E
+(vironment at startup)-.4 E 32.5<8372>108 655.2 S(edirecting output usi\
ng the >, >|, <>, >&, &>, and >> redirection operators)-32.5 E 32.5
-<8375>108 542.4 S(sing the)-32.5 E F1(exec)2.5 E F0 -.2(bu)2.5 G
+<8375>108 672 S(sing the)-32.5 E F1(exec)2.5 E F0 -.2(bu)2.5 G
(iltin command to replace the shell with another command).2 E 32.5<8361>
-108 559.2 S(dding or deleting b)-32.5 E(uiltin commands with the)-.2 E
+108 688.8 S(dding or deleting b)-32.5 E(uiltin commands with the)-.2 E
F1<ad66>2.5 E F0(and)2.5 E F1<ad64>2.5 E F0(options to the)2.5 E F1
-(enable)2.5 E F0 -.2(bu)2.5 G(iltin command).2 E 32.5<8375>108 576 S
+(enable)2.5 E F0 -.2(bu)2.5 G(iltin command).2 E 32.5<8375>108 705.6 S
(sing the)-32.5 E F1(enable)2.5 E F0 -.2(bu)2.5 G
-(iltin command to enable disabled shell b).2 E(uiltins)-.2 E 32.5<8373>
-108 592.8 S(pecifying the)-32.5 E F1<ad70>2.5 E F0(option to the)2.5 E
-F1(command)2.5 E F0 -.2(bu)2.5 G(iltin command).2 E 32.5<8374>108 609.6
-S(urning of)-32.5 E 2.5(fr)-.25 G(estricted mode with)-2.5 E F1(set +r)
-2.5 E F0(or)2.5 E F1(set +o r)2.5 E(estricted)-.18 E F0(.)A
-(These restrictions are enforced after an)108 626.4 Q 2.5(ys)-.15 G
-(tartup \214les are read.)-2.5 E 1.566
-(When a command that is found to be a shell script is e)108 643.2 R -.15
-(xe)-.15 G 1.566(cuted \(see).15 F F3 1.566(COMMAND EXECUTION)4.066 F F0
-(abo)3.816 E -.15(ve)-.15 G(\),).15 E F1(rbash)108 655.2 Q F0(turns of)
-2.5 E 2.5(fa)-.25 G .3 -.15(ny r)-2.5 H(estrictions in the shell spa).15
-E(wned to e)-.15 E -.15(xe)-.15 G(cute the script.).15 E F5(SEE ALSO)72
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%%Trailer
end
%%EOF
\entry{umask}{43}{\code {umask}}
\entry{unset}{43}{\code {unset}}
\entry{alias}{43}{\code {alias}}
-\entry{bind}{43}{\code {bind}}
+\entry{bind}{44}{\code {bind}}
\entry{builtin}{45}{\code {builtin}}
\entry{caller}{45}{\code {caller}}
\entry{command}{45}{\code {command}}
-\entry{declare}{45}{\code {declare}}
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\entry{echo}{47}{\code {echo}}
\entry{enable}{48}{\code {enable}}
\entry{help}{48}{\code {help}}
\entry {\code {alias}}{43}
\initial {B}
\entry {\code {bg}}{92}
-\entry {\code {bind}}{43}
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\entry {\code {break}}{37}
\entry {\code {builtin}}{45}
\initial {C}
\entry {\code {compopt}}{122}
\entry {\code {continue}}{38}
\initial {D}
-\entry {\code {declare}}{45}
+\entry {\code {declare}}{46}
\entry {\code {dirs}}{83}
\entry {\code {disown}}{93}
\initial {E}
<HTML>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-<!-- Created on December, 7 2010 by texi2html 1.64 -->
+<!-- Created on December, 28 2010 by texi2html 1.64 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
<H1>Bash Reference Manual</H1></P><P>
This text is a brief description of the features that are present in
-the Bash shell (version 4.2, 20 October 2010).
+the Bash shell (version 4.2, 28 December 2010).
</P><P>
-This is Edition 4.2, last updated 20 October 2010,
+This is Edition 4.2, last updated 28 December 2010,
of <CITE>The GNU Bash Reference Manual</CITE>,
for <CODE>Bash</CODE>, Version 4.2.
</P><P>
as primaries.
</P><P>
-When used with <SAMP>`[['</SAMP>, The <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP> operators sort
+When used with <SAMP>`[['</SAMP>, the <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP> operators sort
lexicographically using the current locale.
</P><P>
</DL>
<P>
+When used with <CODE>test</CODE> or <SAMP>`['</SAMP>, the <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP>
+operators sort lexicographically using ASCII ordering.
+</P><P>
+
<DT><CODE>times</CODE>
<DD><A NAME="IDX85"></A>
<TABLE><tr><td> </td><td class=example><pre>times
<DT><CODE>compat32</CODE>
<DD>If set, Bash
changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the conditional command's <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP>
-operators.
+string comparison when using the <SAMP>`[['</SAMP>
+conditional command's <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP> operators.
+Bash versions prior to bash-4.0 use ASCII collation and strcmp(3);
+bash-4.1 and later use the current locale's collation sequence and strcoll(3).
<P>
<DT><CODE>compat40</CODE>
<DD>If set, Bash
changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the conditional command's <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP>
-operators and the effect of interrupting a command list.
+string comparison when using the <SAMP>`[['</SAMP>
+conditional command's <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP> operators (see previous item)
+and the effect of interrupting a command list.
<P>
<DT><CODE>compat41</CODE>
<A NAME="IDX166"></A>
<DT><CODE>COLUMNS</CODE>
<DD><A NAME="IDX167"></A>
-Used by the <CODE>select</CODE> builtin command to determine the terminal width
+Used by the <CODE>select</CODE> command to determine the terminal width
when printing selection lists. Automatically set upon receipt of a
<CODE>SIGWINCH</CODE>.
<P>
<A NAME="IDX246"></A>
<DT><CODE>LINES</CODE>
<DD><A NAME="IDX247"></A>
-Used by the <CODE>select</CODE> builtin command to determine the column length
+Used by the <CODE>select</CODE> command to determine the column length
for printing selection lists. Automatically set upon receipt of a
<CODE>SIGWINCH</CODE>.
<P>
descriptor 0, 1, or 2, respectively, is checked.
</P><P>
-When used with <SAMP>`[['</SAMP>, The <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP> operators sort
+When used with <SAMP>`[['</SAMP>, the <SAMP>`<'</SAMP> and <SAMP>`>'</SAMP> operators sort
lexicographically using the current locale.
+The <CODE>test</CODE> command uses ASCII ordering.
</P><P>
Unless otherwise specified, primaries that operate on files follow symbolic
<P>
<DT><CODE>--enable-select</CODE>
-<DD>Include the <CODE>select</CODE> builtin, which allows the generation of simple
-menus (see section <A HREF="bashref.html#SEC21">3.2.4.2 Conditional Constructs</A>).
+<DD>Include the <CODE>select</CODE> compound command, which allows the generation of
+
simple menus (see section <A HREF="bashref.html#SEC21">3.2.4.2 Conditional Constructs</A>).
<P>
<DT><CODE>--enable-separate-helpfiles</CODE>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="bashref.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<H1>About this document</H1>
-This document was generated by <I>Chet Ramey</I> on <I>December, 7 2010</I>
+This document was generated by <I>Chet Ramey</I> on <I>December, 28 2010</I>
using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html
"><I>texi2html</I></A>
<P></P>
<BR>
<FONT SIZE="-1">
This document was generated
-by <I>Chet Ramey</I> on <I>December, 7 2010</I>
+by <I>Chet Ramey</I> on <I>December, 28 2010</I>
using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html
"><I>texi2html</I></A>
/Users/chet/src/bash/src/doc/bashref.texi.
This text is a brief description of the features that are present in
-the Bash shell (version 4.2, 20 October 2010).
+the Bash shell (version 4.2, 28 December 2010).
- This is Edition 4.2, last updated 20 October 2010, of `The GNU Bash
+ This is Edition 4.2, last updated 28 December 2010, of `The GNU Bash
Reference Manual', for `Bash', Version 4.2.
Copyright (C) 1988-2010 Free Software Foundation, Inc.
*************
This text is a brief description of the features that are present in
-the Bash shell (version 4.2, 20 October 2010).
+the Bash shell (version 4.2, 28 December 2010).
- This is Edition 4.2, last updated 20 October 2010, of `The GNU Bash
+ This is Edition 4.2, last updated 28 December 2010, of `The GNU Bash
Reference Manual', for `Bash', Version 4.2.
Bash contains features that appear in other popular shells, and some
performed. Conditional operators such as `-f' must be unquoted to
be recognized as primaries.
- When used with `[[', The `<' and `>' operators sort
+ When used with `[[', the `<' and `>' operators sort
lexicographically using the current locale.
When the `==' and `!=' operators are used, the string to the right
The expression is parsed and evaluated according to precedence
using the rules listed above.
+ When used with `test' or `[', the `<' and `>' operators sort
+ lexicographically using ASCII ordering.
+
`times'
times
Print out the user and system times used by the shell and its
`compat32'
If set, Bash changes its behavior to that of version 3.2 with
respect to locale-specific string comparison when using the
- conditional command's `<' and `>' operators.
+ `[[' conditional command's `<' and `>' operators. Bash
+ versions prior to bash-4.0 use ASCII collation and strcmp(3);
+ bash-4.1 and later use the current locale's collation
+ sequence and strcoll(3).
`compat40'
If set, Bash changes its behavior to that of version 4.0 with
respect to locale-specific string comparison when using the
- conditional command's `<' and `>' operators and the effect of
- interrupting a command list.
+ `[[' conditional command's `<' and `>' operators (see
+ previous item) and the effect of interrupting a command list.
`compat41'
If set, Bash, when in posix mode, treats a single quote in a
unsetting it will result in the standard error being closed.
`COLUMNS'
- Used by the `select' builtin command to determine the terminal
- width when printing selection lists. Automatically set upon
- receipt of a `SIGWINCH'.
+ Used by the `select' command to determine the terminal width when
+ printing selection lists. Automatically set upon receipt of a
+ `SIGWINCH'.
`COMP_CWORD'
An index into `${COMP_WORDS}' of the word containing the current
executing.
`LINES'
- Used by the `select' builtin command to determine the column length
- for printing selection lists. Automatically set upon receipt of a
+ Used by the `select' command to determine the column length for
+ printing selection lists. Automatically set upon receipt of a
`SIGWINCH'.
`MACHTYPE'
`/dev/stdin', `/dev/stdout', or `/dev/stderr', file descriptor 0, 1, or
2, respectively, is checked.
- When used with `[[', The `<' and `>' operators sort
-lexicographically using the current locale.
+ When used with `[[', the `<' and `>' operators sort
+lexicographically using the current locale. The `test' command uses
+ASCII ordering.
Unless otherwise specified, primaries that operate on files follow
symbolic links and operate on the target of the link, rather than the
The Restricted Shell::, for a description of restricted mode.
`--enable-select'
- Include the `select' builtin, which allows the generation of simple
- menus (*note Conditional Constructs::).
+ Include the `select' compound command, which allows the generation
+ of simple menus (*note Conditional Constructs::).
`--enable-separate-helpfiles'
Use external files for the documentation displayed by the `help'
* test: Bourne Shell Builtins.
(line 217)
* times: Bourne Shell Builtins.
- (line 287)
+ (line 290)
* trap: Bourne Shell Builtins.
- (line 292)
+ (line 295)
* type: Bash Builtins. (line 539)
* typeset: Bash Builtins. (line 570)
* ulimit: Bash Builtins. (line 576)
* umask: Bourne Shell Builtins.
- (line 338)
+ (line 341)
* unalias: Bash Builtins. (line 665)
* unset: Bourne Shell Builtins.
- (line 355)
+ (line 358)
* wait: Job Control Builtins.
(line 73)
\1f
Tag Table:
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-Node: Arrays\7f227166
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-Node: Optional Features\7f356955
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-Node: Major Differences From The Bourne Shell\7f367715
-Node: GNU Free Documentation License\7f384402
-Node: Indexes\7f409598
-Node: Builtin Index\7f410052
-Node: Reserved Word Index\7f416879
-Node: Variable Index\7f419327
-Node: Function Index\7f432422
-Node: Concept Index\7f439431
+Node: Top\7f1346
+Node: Introduction\7f3185
+Node: What is Bash?\7f3413
+Node: What is a shell?\7f4526
+Node: Definitions\7f7066
+Node: Basic Shell Features\7f9984
+Node: Shell Syntax\7f11203
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+Node: Compound Commands\7f25472
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+Node: GNU Parallel\7f39992
+Node: Shell Functions\7f42460
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+Node: Shell Builtin Commands\7f104994
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+Node: Modifying Shell Behavior\7f151166
+Node: The Set Builtin\7f151511
+Node: The Shopt Builtin\7f161045
+Node: Special Builtins\7f173217
+Node: Shell Variables\7f174196
+Node: Bourne Shell Variables\7f174636
+Node: Bash Variables\7f176663
+Node: Bash Features\7f201572
+Node: Invoking Bash\7f202455
+Node: Bash Startup Files\7f208219
+Node: Interactive Shells\7f213240
+Node: What is an Interactive Shell?\7f213650
+Node: Is this Shell Interactive?\7f214299
+Node: Interactive Shell Behavior\7f215114
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+Node: Shell Arithmetic\7f222183
+Node: Aliases\7f224942
+Node: Arrays\7f227514
+Node: The Directory Stack\7f231629
+Node: Directory Stack Builtins\7f232343
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+Node: The Restricted Shell\7f237987
+Node: Bash POSIX Mode\7f239819
+Node: Job Control\7f248480
+Node: Job Control Basics\7f248940
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+Node: Commands For Completion\7f305657
+Node: Keyboard Macros\7f309849
+Node: Miscellaneous Commands\7f310420
+Node: Readline vi Mode\7f316226
+Node: Programmable Completion\7f317133
+Node: Programmable Completion Builtins\7f324343
+Node: Using History Interactively\7f333479
+Node: Bash History Facilities\7f334163
+Node: Bash History Builtins\7f337077
+Node: History Interaction\7f340934
+Node: Event Designators\7f343639
+Node: Word Designators\7f344861
+Node: Modifiers\7f346500
+Node: Installing Bash\7f347904
+Node: Basic Installation\7f349041
+Node: Compilers and Options\7f351733
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+Node: Installation Names\7f354138
+Node: Specifying the System Type\7f354956
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+Node: Major Differences From The Bourne Shell\7f368072
+Node: GNU Free Documentation License\7f384759
+Node: Indexes\7f409955
+Node: Builtin Index\7f410409
+Node: Reserved Word Index\7f417236
+Node: Variable Index\7f419684
+Node: Function Index\7f432779
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\1f
End Tag Table
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**/Users/chet/src/bash/src/doc/bashref.texi
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Loading texinfo [version 2009-01-18.17]:
[15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29]
[30] [31] [32] [33] [34] Chapter 4 [35] [36] [37] [38] [39] [40] [41] [42]
[43]
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+Underfull \hbox (badness 5231) in paragraph at lines 3414--3427
@texttt emacs-meta[]@textrm , @texttt emacs-ctlx[]@textrm , @texttt vi[]@textr
m , @texttt vi-move[]@textrm , @texttt vi-command[]@textrm , and
.etc.
[44] [45] [46] [47] [48] [49]
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[]@texttt read [-ers] [-a @textttsl aname@texttt ] [-d @textttsl de-lim@texttt
] [-i @textttsl text@texttt ] [-n @textttsl nchars@texttt ] [-N @textttsl ncha
rs@texttt ] [-p @textttsl prompt@texttt ] [-t @textttsl time-
[50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] Chapter 5 [62]
[63] [64] [65] [66] [67] [68] [69] [70] [71] Chapter 6 [72]
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[]@texttt bash [long-opt] [-ir] [-abefhkmnptuvxdBCDHP] [-o @textttsl op-tion@t
exttt ] [-O @textttsl shopt_option@texttt ] [@textttsl ar-
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[]@texttt bash [long-opt] [-abefhkmnptuvxdBCDHP] [-o @textttsl op-tion@texttt
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-
.etc.
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[]@texttt bash [long-opt] -s [-abefhkmnptuvxdBCDHP] [-o @textttsl op-tion@text
tt ] [-O @textttsl shopt_option@texttt ] [@textttsl ar-
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[73] [74]
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[]@textrm When a lo-gin shell ex-its, Bash reads and ex-e-cutes com-mands from
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@textrm `@texttt --enable-strict-posix-default[]@textrm '[] to @texttt configur
e[] @textrm when build-ing (see Sec-tion 10.8
[121] [122]) (/Users/chet/src/bash/src/lib/readline/doc/hsuser.texi Chapter 9
[123] [124] [125] [126] [127] [128]) Chapter 10 [129] [130] [131] [132]
[133]
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b Fb(37)150 2668 y Fe(builtin)15 b Fc(:)f(:)f(:)h(:)f(:)g(:)g(:)g(:)g
Fr(D)150 3894 y Fe(declare)15 b Fc(:)f(:)f(:)h(:)f(:)g(:)g(:)g(:)g(:)g
(:)g(:)h(:)f(:)g(:)g(:)g(:)g(:)g(:)h(:)f(:)g(:)g(:)g(:)g(:)g(:)g(:)h(:)
f(:)g(:)g(:)g(:)g(:)g(:)g(:)h(:)f(:)g(:)g(:)g(:)41 b
-Fb(45)150 3982 y Fe(dirs)23 b Fc(:)13 b(:)g(:)h(:)f(:)g(:)g(:)g(:)g(:)g
+Fb(46)150 3982 y Fe(dirs)23 b Fc(:)13 b(:)g(:)h(:)f(:)g(:)g(:)g(:)g(:)g
(:)g(:)h(:)f(:)g(:)g(:)g(:)g(:)g(:)g(:)h(:)f(:)g(:)g(:)g(:)g(:)g(:)h(:)
f(:)g(:)g(:)g(:)g(:)g(:)g(:)h(:)f(:)g(:)g(:)g(:)g(:)g(:)g(:)49
b Fb(83)150 4069 y Fe(disown)17 b Fc(:)e(:)e(:)g(:)g(:)g(:)g(:)g(:)h(:)
Conditional operators such as @samp{-f} must be unquoted to be recognized
as primaries.
-When used with @samp{[[}, The @samp{<} and @samp{>} operators sort
+When used with @samp{[[}, the @samp{<} and @samp{>} operators sort
lexicographically using the current locale.
When the @samp{==} and @samp{!=} operators are used, the string to the
@item readonly
@btindex readonly
@example
-readonly [-aApf] [@var{name}[=@var{value}]] @dots{}
+readonly [-aAf] [-p] [@var{name}[=@var{value}]] @dots{}
@end example
Mark each @var{name} as readonly.
The values of these names may not be changed by subsequent assignment.
The @option{-a} option means each @var{name} refers to an indexed
array variable; the @option{-A} option means each @var{name} refers
to an associative array variable.
+If both options are supplied, @option{-A} takes precedence.
If no @var{name} arguments are given, or if the @option{-p}
option is supplied, a list of all readonly names is printed.
+The other options may be used to restrict the output to a subset of
+the set of readonly names.
The @option{-p} option causes output to be displayed in a format that
may be reused as input.
If a variable name is followed by =@var{value}, the value of
using the rules listed above.
@end table
+When used with @code{test} or @samp{[}, the @samp{<} and @samp{>}
+operators sort lexicographically using ASCII ordering.
+
@item times
@btindex times
@example
@option{-F} implies @option{-f}.
The @option{-g} option forces variables to be created or modified at
-the global scope, even when \fBdeclare\fP is executed in a shell function.
+the global scope, even when @code{declare} is executed in a shell function.
It is ignored in all other cases.
The following options can be used to restrict output to variables with
@item compat32
If set, Bash
changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the conditional command's @samp{<} and @samp{>}
-operators.
+string comparison when using the @samp{[[}
+conditional command's @samp{<} and @samp{>} operators.
+Bash versions prior to bash-4.0 use ASCII collation and strcmp(3);
+bash-4.1 and later use the current locale's collation sequence and strcoll(3).
@item compat40
If set, Bash
changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the conditional command's @samp{<} and @samp{>}
-operators and the effect of interrupting a command list.
+string comparison when using the @samp{[[}
+conditional command's @samp{<} and @samp{>} operators (see previous item)
+and the effect of interrupting a command list.
@item compat41
If set, Bash, when in posix mode, treats a single quote in a double-quoted
@item globstar
If set, the pattern @samp{**} used in a filename expansion context will
-match a files and zero or more directories and subdirectories.
+match all files and zero or more directories and subdirectories.
If the pattern is followed by a @samp{/}, only directories and
subdirectories match.
being closed.
@item COLUMNS
-Used by the @code{select} builtin command to determine the terminal width
+Used by the @code{select} command to determine the terminal width
when printing selection lists. Automatically set upon receipt of a
@code{SIGWINCH}.
The line number in the script or shell function currently executing.
@item LINES
-Used by the @code{select} builtin command to determine the column length
+Used by the @code{select} command to determine the column length
for printing selection lists. Automatically set upon receipt of a
@code{SIGWINCH}.
@file{/dev/stdin}, @file{/dev/stdout}, or @file{/dev/stderr}, file
descriptor 0, 1, or 2, respectively, is checked.
-When used with @samp{[[}, The @samp{<} and @samp{>} operators sort
+When used with @samp{[[}, the @samp{<} and @samp{>} operators sort
lexicographically using the current locale.
+The @code{test} command uses ASCII ordering.
Unless otherwise specified, primaries that operate on files follow symbolic
links and operate on the target of the link, rather than the link itself.
The @code{declare}, @code{local}, and @code{readonly}
builtins each accept a @option{-a} option to specify an indexed
array and a @option{-A} option to specify an associative array.
+If both options are supplied, @option{-A} takes precedence.
The @code{read} builtin accepts a @option{-a}
option to assign a list of words read from the standard input
to an array, and can read values from the standard input into
@ref{The Restricted Shell}, for a description of restricted mode.
@item --enable-select
-Include the @code{select} builtin, which allows the generation of simple
-menus (@pxref{Conditional Constructs}).
+Include the @code{select} compound command, which allows the generation of
+simple menus (@pxref{Conditional Constructs}).
@item --enable-separate-helpfiles
Use external files for the documentation displayed by the @code{help} builtin
Conditional operators such as @samp{-f} must be unquoted to be recognized
as primaries.
-When used with @samp{[[}, The @samp{<} and @samp{>} operators sort
+When used with @samp{[[}, the @samp{<} and @samp{>} operators sort
lexicographically using the current locale.
When the @samp{==} and @samp{!=} operators are used, the string to the
@item readonly
@btindex readonly
@example
-readonly [-aApf] [@var{name}[=@var{value}]] @dots{}
+readonly [-aAf] [-p] [@var{name}[=@var{value}]] @dots{}
@end example
Mark each @var{name} as readonly.
The values of these names may not be changed by subsequent assignment.
The @option{-a} option means each @var{name} refers to an indexed
array variable; the @option{-A} option means each @var{name} refers
to an associative array variable.
+If both options are supplied, @option{-A} takes precedence.
If no @var{name} arguments are given, or if the @option{-p}
option is supplied, a list of all readonly names is printed.
+The other options may be used to restrict the output to a subset of
+the set of readonly names.
The @option{-p} option causes output to be displayed in a format that
may be reused as input.
If a variable name is followed by =@var{value}, the value of
false.
@item 3 arguments
+The following conditions are applied in the order listed.
If the second argument is one of the binary conditional
operators (@pxref{Bash Conditional Expressions}), the
result of the expression is the result of the binary test using the
using the rules listed above.
@end table
+When used with @code{test} or @samp{[}, the @samp{<} and @samp{>}
+operators sort lexicographically using ASCII ordering.
+
@item times
@btindex times
@example
@item compat32
If set, Bash
changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the conditional command's @samp{<} and @samp{>}
-operators.
+string comparison when using the @samp{[[}
+conditional command's @samp{<} and @samp{>} operators.
+Bash versions prior to bash-4.0 use ASCII collation and strcmp(3);
+bash-4.1 and later use the current locale's collation sequence and strcoll(3).
@item compat40
If set, Bash
changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the conditional command's @samp{<} and @samp{>}
-operators and the effect of interrupting a command list.
+string comparison when using the @samp{[[}
+conditional command's @samp{<} and @samp{>} operators (see previous item)
+and the effect of interrupting a command list.
@item compat41
If set, Bash, when in posix mode, treats a single quote in a double-quoted
@item globstar
If set, the pattern @samp{**} used in a filename expansion context will
-match a files and zero or more directories and subdirectories.
+match all files and zero or more directories and subdirectories.
If the pattern is followed by a @samp{/}, only directories and
subdirectories match.
being closed.
@item COLUMNS
-Used by the @code{select} builtin command to determine the terminal width
+Used by the @code{select} command to determine the terminal width
when printing selection lists. Automatically set upon receipt of a
@code{SIGWINCH}.
The line number in the script or shell function currently executing.
@item LINES
-Used by the @code{select} builtin command to determine the column length
+Used by the @code{select} command to determine the column length
for printing selection lists. Automatically set upon receipt of a
@code{SIGWINCH}.
@file{/dev/stdin}, @file{/dev/stdout}, or @file{/dev/stderr}, file
descriptor 0, 1, or 2, respectively, is checked.
-When used with @samp{[[}, The @samp{<} and @samp{>} operators sort
+When used with @samp{[[}, the @samp{<} and @samp{>} operators sort
lexicographically using the current locale.
+The @code{test} command uses ASCII ordering.
Unless otherwise specified, primaries that operate on files follow symbolic
links and operate on the target of the link, rather than the link itself.
The @code{declare}, @code{local}, and @code{readonly}
builtins each accept a @option{-a} option to specify an indexed
array and a @option{-A} option to specify an associative array.
+If both options are supplied, @option{-A} takes precedence.
The @code{read} builtin accepts a @option{-a}
option to assign a list of words read from the standard input
to an array, and can read values from the standard input into
@ref{The Restricted Shell}, for a description of restricted mode.
@item --enable-select
-Include the @code{select} builtin, which allows the generation of simple
-menus (@pxref{Conditional Constructs}).
+Include the @code{select} compound command, which allows the generation of
+simple menus (@pxref{Conditional Constructs}).
@item --enable-separate-helpfiles
Use external files for the documentation displayed by the @code{help} builtin
easy re-editing of multi-line commands.
c\bco\bom\bmp\bpa\bat\bt3\b31\b1
If set, b\bba\bas\bsh\bh changes its behavior to that of version 3.1
- with respect to quoted arguments to the conditional com-
- mand's =\b=~\b~ operator.
+ with respect to quoted arguments to the [\b[[\b[ conditional
+ command's =\b=~\b~ operator.
c\bco\bom\bmp\bpa\bat\bt3\b32\b2
If set, b\bba\bas\bsh\bh changes its behavior to that of version 3.2
with respect to locale-specific string comparison when
- using the conditional command's <\b< and >\b> operators.
+ using the [\b[[\b[ conditional command's <\b< and >\b> operators.
+ Bash versions prior to bash-4.1 use ASCII collation and
+ _\bs_\bt_\br_\bc_\bm_\bp(3); bash-4.1 and later use the current locale's
+ collation sequence and _\bs_\bt_\br_\bc_\bo_\bl_\bl(3).
c\bco\bom\bmp\bpa\bat\bt4\b40\b0
If set, b\bba\bas\bsh\bh changes its behavior to that of version 4.0
- with respect to locale-specific string comparison when
- using the conditional command's <\b< and >\b> operators and
- the effect of interrupting a command list.
+ with respect to locale-specific string comparison when
+ using the [\b[[\b[ conditional command's <\b< and >\b> operators
+ (see previous item) and the effect of interrupting a
+ command list.
c\bco\bom\bmp\bpa\bat\bt4\b41\b1
@item compat41 If set, b\bba\bas\bsh\bh, when in posix mode, treats
a single quote in a double-quoted parameter expansion as
The expression is parsed and evaluated according to
precedence using the rules listed above.
- t\bti\bim\bme\bes\bs Print the accumulated user and system times for the shell and
+ When used with t\bte\bes\bst\bt or [\b[, the <\b< and >\b> operators sort lexico-
+ graphically using ASCII ordering.
+
+ t\bti\bim\bme\bes\bs Print the accumulated user and system times for the shell and
for processes run from the shell. The return status is 0.
t\btr\bra\bap\bp [-\b-l\blp\bp] [[_\ba_\br_\bg] _\bs_\bi_\bg_\bs_\bp_\be_\bc ...]
- The command _\ba_\br_\bg is to be read and executed when the shell
- receives signal(s) _\bs_\bi_\bg_\bs_\bp_\be_\bc. If _\ba_\br_\bg is absent (and there is a
- single _\bs_\bi_\bg_\bs_\bp_\be_\bc) or -\b-, each specified signal is reset to its
- original disposition (the value it had upon entrance to the
- shell). If _\ba_\br_\bg is the null string the signal specified by each
- _\bs_\bi_\bg_\bs_\bp_\be_\bc is ignored by the shell and by the commands it invokes.
- If _\ba_\br_\bg is not present and -\b-p\bp has been supplied, then the trap
- commands associated with each _\bs_\bi_\bg_\bs_\bp_\be_\bc are displayed. If no
- arguments are supplied or if only -\b-p\bp is given, t\btr\bra\bap\bp prints the
- list of commands associated with each signal. The -\b-l\bl option
- causes the shell to print a list of signal names and their cor-
- responding numbers. Each _\bs_\bi_\bg_\bs_\bp_\be_\bc is either a signal name
- defined in <_\bs_\bi_\bg_\bn_\ba_\bl_\b._\bh>, or a signal number. Signal names are
+ The command _\ba_\br_\bg is to be read and executed when the shell
+ receives signal(s) _\bs_\bi_\bg_\bs_\bp_\be_\bc. If _\ba_\br_\bg is absent (and there is a
+ single _\bs_\bi_\bg_\bs_\bp_\be_\bc) or -\b-, each specified signal is reset to its
+ original disposition (the value it had upon entrance to the
+ shell). If _\ba_\br_\bg is the null string the signal specified by each
+ _\bs_\bi_\bg_\bs_\bp_\be_\bc is ignored by the shell and by the commands it invokes.
+ If _\ba_\br_\bg is not present and -\b-p\bp has been supplied, then the trap
+ commands associated with each _\bs_\bi_\bg_\bs_\bp_\be_\bc are displayed. If no
+ arguments are supplied or if only -\b-p\bp is given, t\btr\bra\bap\bp prints the
+ list of commands associated with each signal. The -\b-l\bl option
+ causes the shell to print a list of signal names and their cor-
+ responding numbers. Each _\bs_\bi_\bg_\bs_\bp_\be_\bc is either a signal name
+ defined in <_\bs_\bi_\bg_\bn_\ba_\bl_\b._\bh>, or a signal number. Signal names are
case insensitive and the S\bSI\bIG\bG prefix is optional.
- If a _\bs_\bi_\bg_\bs_\bp_\be_\bc is E\bEX\bXI\bIT\bT (0) the command _\ba_\br_\bg is executed on exit
- from the shell. If a _\bs_\bi_\bg_\bs_\bp_\be_\bc is D\bDE\bEB\bBU\bUG\bG, the command _\ba_\br_\bg is exe-
- cuted before every _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd, _\bf_\bo_\br command, _\bc_\ba_\bs_\be command,
- _\bs_\be_\bl_\be_\bc_\bt command, every arithmetic _\bf_\bo_\br command, and before the
- first command executes in a shell function (see S\bSH\bHE\bEL\bLL\bL G\bGR\bRA\bAM\bMM\bMA\bAR\bR
- above). Refer to the description of the e\bex\bxt\btd\bde\beb\bbu\bug\bg option to the
+ If a _\bs_\bi_\bg_\bs_\bp_\be_\bc is E\bEX\bXI\bIT\bT (0) the command _\ba_\br_\bg is executed on exit
+ from the shell. If a _\bs_\bi_\bg_\bs_\bp_\be_\bc is D\bDE\bEB\bBU\bUG\bG, the command _\ba_\br_\bg is exe-
+ cuted before every _\bs_\bi_\bm_\bp_\bl_\be _\bc_\bo_\bm_\bm_\ba_\bn_\bd, _\bf_\bo_\br command, _\bc_\ba_\bs_\be command,
+ _\bs_\be_\bl_\be_\bc_\bt command, every arithmetic _\bf_\bo_\br command, and before the
+ first command executes in a shell function (see S\bSH\bHE\bEL\bLL\bL G\bGR\bRA\bAM\bMM\bMA\bAR\bR
+ above). Refer to the description of the e\bex\bxt\btd\bde\beb\bbu\bug\bg option to the
s\bsh\bho\bop\bpt\bt builtin for details of its effect on the D\bDE\bEB\bBU\bUG\bG trap. If a
_\bs_\bi_\bg_\bs_\bp_\be_\bc is R\bRE\bET\bTU\bUR\bRN\bN, the command _\ba_\br_\bg is executed each time a shell
function or a script executed with the .\b. or s\bso\bou\bur\brc\bce\be builtins fin-
If a _\bs_\bi_\bg_\bs_\bp_\be_\bc is E\bER\bRR\bR, the command _\ba_\br_\bg is executed whenever a sim-
ple command has a non-zero exit status, subject to the following
- conditions. The E\bER\bRR\bR trap is not executed if the failed command
- is part of the command list immediately following a w\bwh\bhi\bil\ble\be or
- u\bun\bnt\bti\bil\bl keyword, part of the test in an _\bi_\bf statement, part of a
- command executed in a &\b&&\b& or |\b||\b| list, or if the command's return
- value is being inverted via !\b!. These are the same conditions
+ conditions. The E\bER\bRR\bR trap is not executed if the failed command
+ is part of the command list immediately following a w\bwh\bhi\bil\ble\be or
+ u\bun\bnt\bti\bil\bl keyword, part of the test in an _\bi_\bf statement, part of a
+ command executed in a &\b&&\b& or |\b||\b| list, or if the command's return
+ value is being inverted via !\b!. These are the same conditions
obeyed by the e\ber\brr\bre\bex\bxi\bit\bt option.
- Signals ignored upon entry to the shell cannot be trapped or
- reset. Trapped signals that are not being ignored are reset to
+ Signals ignored upon entry to the shell cannot be trapped or
+ reset. Trapped signals that are not being ignored are reset to
their original values in a subshell or subshell environment when
- one is created. The return status is false if any _\bs_\bi_\bg_\bs_\bp_\be_\bc is
+ one is created. The return status is false if any _\bs_\bi_\bg_\bs_\bp_\be_\bc is
invalid; otherwise t\btr\bra\bap\bp returns true.
t\bty\byp\bpe\be [-\b-a\baf\bft\btp\bpP\bP] _\bn_\ba_\bm_\be [_\bn_\ba_\bm_\be ...]
- With no options, indicate how each _\bn_\ba_\bm_\be would be interpreted if
+ With no options, indicate how each _\bn_\ba_\bm_\be would be interpreted if
used as a command name. If the -\b-t\bt option is used, t\bty\byp\bpe\be prints a
- string which is one of _\ba_\bl_\bi_\ba_\bs, _\bk_\be_\by_\bw_\bo_\br_\bd, _\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn, _\bb_\bu_\bi_\bl_\bt_\bi_\bn, or
- _\bf_\bi_\bl_\be if _\bn_\ba_\bm_\be is an alias, shell reserved word, function,
- builtin, or disk file, respectively. If the _\bn_\ba_\bm_\be is not found,
- then nothing is printed, and an exit status of false is
- returned. If the -\b-p\bp option is used, t\bty\byp\bpe\be either returns the
+ string which is one of _\ba_\bl_\bi_\ba_\bs, _\bk_\be_\by_\bw_\bo_\br_\bd, _\bf_\bu_\bn_\bc_\bt_\bi_\bo_\bn, _\bb_\bu_\bi_\bl_\bt_\bi_\bn, or
+ _\bf_\bi_\bl_\be if _\bn_\ba_\bm_\be is an alias, shell reserved word, function,
+ builtin, or disk file, respectively. If the _\bn_\ba_\bm_\be is not found,
+ then nothing is printed, and an exit status of false is
+ returned. If the -\b-p\bp option is used, t\bty\byp\bpe\be either returns the
name of the disk file that would be executed if _\bn_\ba_\bm_\be were speci-
fied as a command name, or nothing if ``type -t name'' would not
- return _\bf_\bi_\bl_\be. The -\b-P\bP option forces a P\bPA\bAT\bTH\bH search for each _\bn_\ba_\bm_\be,
+ return _\bf_\bi_\bl_\be. The -\b-P\bP option forces a P\bPA\bAT\bTH\bH search for each _\bn_\ba_\bm_\be,
even if ``type -t name'' would not return _\bf_\bi_\bl_\be. If a command is
- hashed, -\b-p\bp and -\b-P\bP print the hashed value, not necessarily the
+ hashed, -\b-p\bp and -\b-P\bP print the hashed value, not necessarily the
file that appears first in P\bPA\bAT\bTH\bH. If the -\b-a\ba option is used, t\bty\byp\bpe\be
- prints all of the places that contain an executable named _\bn_\ba_\bm_\be.
- This includes aliases and functions, if and only if the -\b-p\bp
- option is not also used. The table of hashed commands is not
- consulted when using -\b-a\ba. The -\b-f\bf option suppresses shell func-
- tion lookup, as with the c\bco\bom\bmm\bma\ban\bnd\bd builtin. t\bty\byp\bpe\be returns true if
+ prints all of the places that contain an executable named _\bn_\ba_\bm_\be.
+ This includes aliases and functions, if and only if the -\b-p\bp
+ option is not also used. The table of hashed commands is not
+ consulted when using -\b-a\ba. The -\b-f\bf option suppresses shell func-
+ tion lookup, as with the c\bco\bom\bmm\bma\ban\bnd\bd builtin. t\bty\byp\bpe\be returns true if
all of the arguments are found, false if any are not found.
u\bul\bli\bim\bmi\bit\bt [-\b-H\bHS\bST\bTa\bab\bbc\bcd\bde\bef\bfi\bil\blm\bmn\bnp\bpq\bqr\brs\bst\btu\buv\bvx\bx [_\bl_\bi_\bm_\bi_\bt]]
- Provides control over the resources available to the shell and
- to processes started by it, on systems that allow such control.
+ Provides control over the resources available to the shell and
+ to processes started by it, on systems that allow such control.
The -\b-H\bH and -\b-S\bS options specify that the hard or soft limit is set
- for the given resource. A hard limit cannot be increased by a
- non-root user once it is set; a soft limit may be increased up
- to the value of the hard limit. If neither -\b-H\bH nor -\b-S\bS is speci-
+ for the given resource. A hard limit cannot be increased by a
+ non-root user once it is set; a soft limit may be increased up
+ to the value of the hard limit. If neither -\b-H\bH nor -\b-S\bS is speci-
fied, both the soft and hard limits are set. The value of _\bl_\bi_\bm_\bi_\bt
can be a number in the unit specified for the resource or one of
the special values h\bha\bar\brd\bd, s\bso\bof\bft\bt, or u\bun\bnl\bli\bim\bmi\bit\bte\bed\bd, which stand for the
- current hard limit, the current soft limit, and no limit,
- respectively. If _\bl_\bi_\bm_\bi_\bt is omitted, the current value of the
- soft limit of the resource is printed, unless the -\b-H\bH option is
+ current hard limit, the current soft limit, and no limit,
+ respectively. If _\bl_\bi_\bm_\bi_\bt is omitted, the current value of the
+ soft limit of the resource is printed, unless the -\b-H\bH option is
given. When more than one resource is specified, the limit name
and unit are printed before the value. Other options are inter-
preted as follows:
-\b-c\bc The maximum size of core files created
-\b-d\bd The maximum size of a process's data segment
-\b-e\be The maximum scheduling priority ("nice")
- -\b-f\bf The maximum size of files written by the shell and its
+ -\b-f\bf The maximum size of files written by the shell and its
children
-\b-i\bi The maximum number of pending signals
-\b-l\bl The maximum size that may be locked into memory
- -\b-m\bm The maximum resident set size (many systems do not honor
+ -\b-m\bm The maximum resident set size (many systems do not honor
this limit)
-\b-n\bn The maximum number of open file descriptors (most systems
do not allow this value to be set)
-\b-r\br The maximum real-time scheduling priority
-\b-s\bs The maximum stack size
-\b-t\bt The maximum amount of cpu time in seconds
- -\b-u\bu The maximum number of processes available to a single
+ -\b-u\bu The maximum number of processes available to a single
user
- -\b-v\bv The maximum amount of virtual memory available to the
+ -\b-v\bv The maximum amount of virtual memory available to the
shell and, on some systems, to its children
-\b-x\bx The maximum number of file locks
-\b-T\bT The maximum number of threads
If _\bl_\bi_\bm_\bi_\bt is given, it is the new value of the specified resource
(the -\b-a\ba option is display only). If no option is given, then -\b-f\bf
- is assumed. Values are in 1024-byte increments, except for -\b-t\bt,
- which is in seconds, -\b-p\bp, which is in units of 512-byte blocks,
- and -\b-T\bT, -\b-b\bb, -\b-n\bn, and -\b-u\bu, which are unscaled values. The return
+ is assumed. Values are in 1024-byte increments, except for -\b-t\bt,
+ which is in seconds, -\b-p\bp, which is in units of 512-byte blocks,
+ and -\b-T\bT, -\b-b\bb, -\b-n\bn, and -\b-u\bu, which are unscaled values. The return
status is 0 unless an invalid option or argument is supplied, or
an error occurs while setting a new limit.
u\bum\bma\bas\bsk\bk [-\b-p\bp] [-\b-S\bS] [_\bm_\bo_\bd_\be]
The user file-creation mask is set to _\bm_\bo_\bd_\be. If _\bm_\bo_\bd_\be begins with
- a digit, it is interpreted as an octal number; otherwise it is
- interpreted as a symbolic mode mask similar to that accepted by
- _\bc_\bh_\bm_\bo_\bd(1). If _\bm_\bo_\bd_\be is omitted, the current value of the mask is
- printed. The -\b-S\bS option causes the mask to be printed in sym-
- bolic form; the default output is an octal number. If the -\b-p\bp
+ a digit, it is interpreted as an octal number; otherwise it is
+ interpreted as a symbolic mode mask similar to that accepted by
+ _\bc_\bh_\bm_\bo_\bd(1). If _\bm_\bo_\bd_\be is omitted, the current value of the mask is
+ printed. The -\b-S\bS option causes the mask to be printed in sym-
+ bolic form; the default output is an octal number. If the -\b-p\bp
option is supplied, and _\bm_\bo_\bd_\be is omitted, the output is in a form
that may be reused as input. The return status is 0 if the mode
- was successfully changed or if no _\bm_\bo_\bd_\be argument was supplied,
+ was successfully changed or if no _\bm_\bo_\bd_\be argument was supplied,
and false otherwise.
u\bun\bna\bal\bli\bia\bas\bs [-a\ba] [_\bn_\ba_\bm_\be ...]
- Remove each _\bn_\ba_\bm_\be from the list of defined aliases. If -\b-a\ba is
- supplied, all alias definitions are removed. The return value
+ Remove each _\bn_\ba_\bm_\be from the list of defined aliases. If -\b-a\ba is
+ supplied, all alias definitions are removed. The return value
is true unless a supplied _\bn_\ba_\bm_\be is not a defined alias.
u\bun\bns\bse\bet\bt [-f\bfv\bv] [_\bn_\ba_\bm_\be ...]
- For each _\bn_\ba_\bm_\be, remove the corresponding variable or function.
+ For each _\bn_\ba_\bm_\be, remove the corresponding variable or function.
If no options are supplied, or the -\b-v\bv option is given, each _\bn_\ba_\bm_\be
- refers to a shell variable. Read-only variables may not be
- unset. If -\b-f\bf is specified, each _\bn_\ba_\bm_\be refers to a shell func-
- tion, and the function definition is removed. Each unset vari-
- able or function is removed from the environment passed to sub-
- sequent commands. If any of C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDB\bBR\bRE\bEA\bAK\bKS\bS, R\bRA\bAN\bND\bDO\bOM\bM, S\bSE\bEC\bCO\bON\bND\bDS\bS,
- L\bLI\bIN\bNE\bEN\bNO\bO, H\bHI\bIS\bST\bTC\bCM\bMD\bD, F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE, G\bGR\bRO\bOU\bUP\bPS\bS, or D\bDI\bIR\bRS\bST\bTA\bAC\bCK\bK are unset, they
- lose their special properties, even if they are subsequently
+ refers to a shell variable. Read-only variables may not be
+ unset. If -\b-f\bf is specified, each _\bn_\ba_\bm_\be refers to a shell func-
+ tion, and the function definition is removed. Each unset vari-
+ able or function is removed from the environment passed to sub-
+ sequent commands. If any of C\bCO\bOM\bMP\bP_\b_W\bWO\bOR\bRD\bDB\bBR\bRE\bEA\bAK\bKS\bS, R\bRA\bAN\bND\bDO\bOM\bM, S\bSE\bEC\bCO\bON\bND\bDS\bS,
+ L\bLI\bIN\bNE\bEN\bNO\bO, H\bHI\bIS\bST\bTC\bCM\bMD\bD, F\bFU\bUN\bNC\bCN\bNA\bAM\bME\bE, G\bGR\bRO\bOU\bUP\bPS\bS, or D\bDI\bIR\bRS\bST\bTA\bAC\bCK\bK are unset, they
+ lose their special properties, even if they are subsequently
reset. The exit status is true unless a _\bn_\ba_\bm_\be is readonly.
w\bwa\bai\bit\bt [_\bn _\b._\b._\b.]
- Wait for each specified process and return its termination sta-
- tus. Each _\bn may be a process ID or a job specification; if a
- job spec is given, all processes in that job's pipeline are
- waited for. If _\bn is not given, all currently active child pro-
- cesses are waited for, and the return status is zero. If _\bn
- specifies a non-existent process or job, the return status is
- 127. Otherwise, the return status is the exit status of the
+ Wait for each specified process and return its termination sta-
+ tus. Each _\bn may be a process ID or a job specification; if a
+ job spec is given, all processes in that job's pipeline are
+ waited for. If _\bn is not given, all currently active child pro-
+ cesses are waited for, and the return status is zero. If _\bn
+ specifies a non-existent process or job, the return status is
+ 127. Otherwise, the return status is the exit status of the
last process or job waited for.
S\bSE\bEE\bE A\bAL\bLS\bSO\bO
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-3
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-(number corresponding to each function name supplied as an ar)220 372 Q
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-(erify)-.1 E F0 .402(If set, and)184 168 R F1 -.18(re)2.903 G(adline).18
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+(erify)-.1 E F0 .402(If set, and)184 192 R F1 -.18(re)2.903 G(adline).18
E F0 .403
(is being used, the results of history substitution are not immediately)
-2.903 F .662(passed to the shell parser)184 180 R 5.662(.I)-.55 G .661
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-(hostcomplete)144 204 Q F0 1.181(If set, and)184 216 R F1 -.18(re)3.681
+(hostcomplete)144 228 Q F0 1.181(If set, and)184 240 R F1 -.18(re)3.681
G(adline).18 E F0 1.181(is being used,)3.681 F F1(bash)3.682 E F0 1.182
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-(is enabled by def)2.5 E(ault.)-.1 E F1(huponexit)144 252 Q F0(If set,)
-184 264 Q F1(bash)2.5 E F0(will send)2.5 E F2(SIGHUP)2.5 E F0
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+.15 E(xits.)-.15 E F1(interacti)144 300 Q -.1(ve)-.1 G(_comments).1 E F0
+.33(If set, allo)184 312 R 2.83(waw)-.25 G .33(ord be)-2.93 F .33
(ginning with)-.15 F F1(#)2.83 E F0 .33(to cause that w)2.83 F .33
(ord and all remaining characters on)-.1 F .967
-(that line to be ignored in an interacti)184 300 R 1.267 -.15(ve s)-.25
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H .967(hell \(see).15 F F2(COMMENTS)3.467 E F0(abo)3.217 E -.15(ve)-.15
-G 3.467(\). This).15 F .967(option is)3.467 F(enabled by def)184 312 Q
-(ault.)-.1 E F1(lastpipe)144 324 Q F0 1.211
+G 3.467(\). This).15 F .967(option is)3.467 F(enabled by def)184 336 Q
+(ault.)-.1 E F1(lastpipe)144 348 Q F0 1.211
(If set, and job control is not acti)6.66 F -.15(ve)-.25 G 3.712(,t).15
G 1.212(he shell runs the last command of a pipeline not)-3.712 F -.15
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-(vironment.)-.4 E F1(lithist)144 348 Q F0 .655(If set, and the)15.55 F
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+(vironment.)-.4 E F1(lithist)144 372 Q F0 .655(If set, and the)15.55 F
F1(cmdhist)3.155 E F0 .654
(option is enabled, multi-line commands are sa)3.154 F -.15(ve)-.2 G
3.154(dt).15 G 3.154(ot)-3.154 G .654(he history)-3.154 F
-(with embedded ne)184 360 Q
+(with embedded ne)184 384 Q
(wlines rather than using semicolon separators where possible.)-.25 E F1
-(login_shell)144 372 Q F0 .486
+(login_shell)144 396 Q F0 .486
(The shell sets this option if it is started as a login shell \(see)184
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-E F1(mailwar)144 408 Q(n)-.15 E F0 .815(If set, and a \214le that)184
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(re)2.824 G(adline).18 E F0 .324(is being used,)2.824 F F1(bash)2.824 E
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-(completions when completion is attempted on an empty line.)184 468 Q F1
-(nocaseglob)144 480 Q F0 .437(If set,)184 492 R F1(bash)2.937 E F0 .436
+(completions when completion is attempted on an empty line.)184 492 Q F1
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(ws patterns which match no \214les \(see)-.25 F F1 -.1(Pa)3.354 G .854
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-(If set, the programmable completion f)184 600 R .677(acilities \(see)
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--.15(ve)-.15 G(\)).15 E(are enabled.)184 612 Q
-(This option is enabled by def)5 E(ault.)-.1 E F1(pr)144 624 Q(omptv)
--.18 E(ars)-.1 E F0 1.448(If set, prompt strings under)184 636 R 1.448
+-.15(ve)-.15 G(\)).15 E(are enabled.)184 636 Q
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+-.15 F -.15(ex)184 672 S .17(pansion, and quote remo).15 F -.25(va)-.15
G 2.67(la).25 G .17(fter being e)-2.67 F .17(xpanded as described in)
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-E(This option is enabled by def)184 660 Q(ault.)-.1 E F1 -.18(re)144 672
+E(This option is enabled by def)184 684 Q(ault.)-.1 E F1 -.18(re)144 696
S(stricted_shell).18 E F0 1.069
(The shell sets this option if it is started in restricted mode \(see)
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(w\). The)-.25 F -.25(va)4.178 G 1.678(lue may not be changed.).25 F
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(GNU Bash-4.0)72 768 Q(2004 Apr 20)148.735 E(18)198.725 E 0 Cg EP
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-/Times-Bold@0 SF(shift_v)144 84 Q(erbose)-.1 E F0 .502(If set, the)184
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(iltin prints an error message when the shift count e).2 F .501
-(xceeds the number)-.15 F(of positional parameters.)184 108 Q F1(sour)
-144 120 Q(cepath)-.18 E F0 .77(If set, the)184 132 R F1(sour)3.27 E(ce)
+(xceeds the number)-.15 F(of positional parameters.)184 120 Q F1(sour)
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-(\214le supplied as an ar)184 144 Q 2.5(gument. This)-.18 F
-(option is enabled by def)2.5 E(ault.)-.1 E F1(xpg_echo)144 156 Q F0
-(If set, the)184 168 Q F1(echo)2.5 E F0 -.2(bu)2.5 G(iltin e).2 E
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+(option is enabled by def)2.5 E(ault.)-.1 E F1(xpg_echo)144 168 Q F0
+(If set, the)184 180 Q F1(echo)2.5 E F0 -.2(bu)2.5 G(iltin e).2 E
(xpands backslash-escape sequences by def)-.15 E(ault.)-.1 E F1(suspend)
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(xe)-.15 G 1.002(cution of this shell until it recei).15 F -.15(ve)-.25
G 3.501(sa).15 G F2(SIGCONT)A F0 3.501(signal. A)3.251 F 1.001
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04 R F1<ad66>
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16 R F1<ad66>
2.522 E F0 .022(option can be used to o)2.522 F -.15(ve)-.15 G .022
(rride this and force the suspension.).15 F .023(The return status is)
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<ad66>2.5 E F0(is not supplied, or if job control is not enabled.)2.5 E
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(Return a status of 0 or 1 depending on the e)6.77 F -.25(va)-.25 G 1.15
(luation of the conditional e).25 F(xpression)-.15 E F3 -.2(ex)3.65 G
(pr).2 E F0 6.15(.E).73 G(ach)-6.15 E 1.187
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+(operator and operand must be a separate ar)144 264 R 3.688
(gument. Expressions)-.18 F 1.188(are composed of the primaries)3.688 F
-1.89(described abo)144 264 R 2.19 -.15(ve u)-.15 H(nder).15 E F2
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(gument of)-.18 E F1<adad>2.5 E F0(as signifying the end of options.)2.5
-E .785(Expressions may be combined using the follo)144 294 R .786
+E .785(Expressions may be combined using the follo)144 306 R .786
(wing operators, listed in decreasing order of prece-)-.25 F 3.412
-(dence. The)144 306 R -.25(eva)3.412 G .912
+(dence. The)144 318 R -.25(eva)3.412 G .912
(luation depends on the number of ar).25 F .911(guments; see belo)-.18 F
4.711 -.65(w. O)-.25 H .911(perator precedence is).65 F
-(used when there are \214v)144 318 Q 2.5(eo)-.15 G 2.5(rm)-2.5 G(ore ar)
--2.5 E(guments.)-.18 E F1(!)144 330 Q F3 -.2(ex)2.5 G(pr).2 E F0 -.35
+(used when there are \214v)144 330 Q 2.5(eo)-.15 G 2.5(rm)-2.5 G(ore ar)
+-2.5 E(guments.)-.18 E F1(!)144 342 Q F3 -.2(ex)2.5 G(pr).2 E F0 -.35
(Tr)12.6 G(ue if).35 E F3 -.2(ex)2.5 G(pr).2 E F0(is f)3.23 E(alse.)-.1
-E F1(\()144 342 Q F3 -.2(ex)2.5 G(pr).2 E F1(\))2.5 E F0 .26
+E F1(\()144 354 Q F3 -.2(ex)2.5 G(pr).2 E F1(\))2.5 E F0 .26
(Returns the v)6.77 F .26(alue of)-.25 F F3 -.2(ex)2.76 G(pr).2 E F0
5.26(.T)C .26(his may be used to o)-5.26 F -.15(ve)-.15 G .26
-(rride the normal precedence of opera-).15 F(tors.)180 354 Q F3 -.2(ex)
-144 3
66 S(pr1).2 E F0<ad>2.5 E F1(a)A F3 -.2(ex)2.5 G(pr2).2 E F0 -.35
-(Tr)180 378 S(ue if both).35 E F3 -.2(ex)2.5 G(pr1).2 E F0(and)2.5 E F3
--.2(ex)2.5 G(pr2).2 E F0(are true.)2.52 E F3 -.2(ex)144 390 S(pr1).2 E
-F0<ad>2.5 E F1(o)A F3 -.2(ex)2.5 G(pr2).2 E F0 -.35(Tr)180 402 S
+(rride the normal precedence of opera-).15 F(tors.)180 366 Q F3 -.2(ex)
+144 3
78 S(pr1).2 E F0<ad>2.5 E F1(a)A F3 -.2(ex)2.5 G(pr2).2 E F0 -.35
+(Tr)180 390 S(ue if both).35 E F3 -.2(ex)2.5 G(pr1).2 E F0(and)2.5 E F3
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+F0<ad>2.5 E F1(o)A F3 -.2(ex)2.5 G(pr2).2 E F0 -.35(Tr)180 414 S
(ue if either).35 E F3 -.2(ex)2.5 G(pr1).2 E F0(or)2.5 E F3 -.2(ex)2.5 G
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F0 -.25(eva)2.5 G(luate conditional e).25 E
(xpressions using a set of rules based on the number of ar)-.15 E
-(guments.)-.18 E 2.5(0a)144 436.8 S -.18(rg)-2.5 G(uments).18 E(The e)
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-(rg)-2.5 G(ument).18 E(The e)180 472.8 Q
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+(rg)-2.5 G(ument).18 E(The e)180 484.8 Q
(xpression is true if and only if the ar)-.15 E(gument is not null.)-.18
-E 2.5(2a)144 484.8 S -.18(rg)-2.5 G(uments).18 E .37(If the \214rst ar)
-180 496.8 R .37(gument is)-.18 F F1(!)2.87 E F0 2.87(,t)C .37(he e)-2.87
+E 2.5(2a)144 496.8 S -.18(rg)-2.5 G(uments).18 E .37(If the \214rst ar)
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F .37(xpression is true if and only if the second ar)-.15 F .37
-(gument is null.)-.18 F .379(If the \214rst ar)180 508.8 R .38
+(gument is null.)-.18 F .379(If the \214rst ar)180 520.8 R .38
(gument is one of the unary conditional operators listed abo)-.18 F .68
--.15(ve u)-.15 H(nder).15 E F2(CONDI-)2.88 E(TION)180 520.8 Q .553
+-.15(ve u)-.15 H(nder).15 E F2(CONDI-)2.88 E(TION)180 532.8 Q .553
(AL EXPRESSIONS)-.18 F F4(,)A F0 .552(the e)2.802 F .552
(xpression is true if the unary test is true.)-.15 F .552
-(If the \214rst ar)5.552 F(gu-)-.18 E(ment is not a v)180 532.8 Q
+(If the \214rst ar)5.552 F(gu-)-.18 E(ment is not a v)180 544.8 Q
(alid unary conditional operator)-.25 E 2.5(,t)-.4 G(he e)-2.5 E
-(xpression is f)-.15 E(alse.)-.1 E 2.5(3a)144 544.8 S -.18(rg)-2.5 G
-(uments).18 E .236(The follo)180 556.8 R .236
+(xpression is f)-.15 E(alse.)-.1 E 2.5(3a)144 556.8 S -.18(rg)-2.5 G
+(uments).18 E .236(The follo)180 568.8 R .236
(wing conditions are applied in the order listed.)-.25 F .236
(If the second ar)5.236 F .236(gument is one of)-.18 F .855
-(the binary conditional operators listed abo)180 568.8 R 1.155 -.15
+(the binary conditional operators listed abo)180 580.8 R 1.155 -.15
(ve u)-.15 H(nder).15 E F2(CONDITION)3.355 E .855(AL EXPRESSIONS)-.18 F
-F4(,)A F0(the)3.104 E .578(result of the e)180 580.8 R .578(xpression i\
+F4(,)A F0(the)3.104 E .578(result of the e)180 592.8 R .578(xpression i\
s the result of the binary test using the \214rst and third ar)-.15 F
-(guments)-.18 E 1.333(as operands.)180
592.8 R(The)6.333 E F1<ad61>3.833
+(guments)-.18 E 1.333(as operands.)180
604.8 R(The)6.333 E F1<ad61>3.833
E F0(and)3.833 E F1<ad6f>3.832 E F0 1.332
(operators are considered binary operators when there are)3.832 F .558
-(three ar)180 604.8 R 3.058(guments. If)-.18 F .558(the \214rst ar)3.058
+(three ar)180 616.8 R 3.058(guments. If)-.18 F .558(the \214rst ar)3.058
F .558(gument is)-.18 F F1(!)3.058 E F0 3.058(,t)C .558(he v)-3.058 F
.558(alue is the ne)-.25 F -.05(ga)-.15 G .558(tion of the tw).05 F
(o-ar)-.1 E(gument)-.18 E .521(test using the second and third ar)180
-616.8 R 3.021(guments. If)-.18 F .521(the \214rst ar)3.021 F .52
+628.8 R 3.021(guments. If)-.18 F .521(the \214rst ar)3.021 F .52
(gument is e)-.18 F(xactly)-.15 E F1(\()3.02 E F0 .52(and the third)3.02
-F(ar)180 628.8 Q .485(gument is e)-.18 F(xactly)-.15 E F1(\))2.985 E F0
+F(ar)180 640.8 Q .485(gument is e)-.18 F(xactly)-.15 E F1(\))2.985 E F0
2.985(,t)C .485(he result is the one-ar)-2.985 F .485
(gument test of the second ar)-.18 F 2.985(gument. Other)-.18 F(-)-.2 E
-(wise, the e)180 640.8 Q(xpression is f)-.15 E(alse.)-.1 E 2.5(4a)144
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.385(gument is)-.18 F F1(!)2.885 E F0 2.885(,t)C .385
(he result is the ne)-2.885 F -.05(ga)-.15 G .384(tion of the three-ar)
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1.647(the e)4.147 F 1.648(xpression is parsed and e)-.15 F -.25(va)-.25
G(luated).25 E(according to precedence using the rules listed abo)180
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--2.5 E(guments)-.18 E 1.635(The e)180 712.8 R 1.635
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-(luated according to precedence using the rules listed).25 F(abo)180
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-/Times-Bold@0 SF(times)108 84 Q F0 1.229(Print the accumulated user and\
- system times for the shell and for processes run from the shell.)13.23
-F(The return status is 0.)144 96 Q F1(trap)108 112.8 Q F0([)2.5 E F1
-(\255lp)A F0 2.5(][)C([)-2.5 E/F2 10/Times-Italic@0 SF(ar)A(g)-.37 E F0
-(])A F2(sigspec)2.5 E F0(...])2.5 E .703(The command)144 124.8 R F2(ar)
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+(TINS\(1\) B)-.92 F(ASH_B)-.35 E(UIL)-.1 E(TINS\(1\))-.92 E 2.5(5o)144
+84 S 2.5(rm)-2.5 G(ore ar)-2.5 E(guments)-.18 E 1.635(The e)180 96 R
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+(luated according to precedence using the rules listed).25 F(abo)180 108
+Q -.15(ve)-.15 G(.).15 E(When used with)144 126 Q/F1 10/Times-Bold@0 SF
+(test)2.5 E F0(or)2.5 E F1([)2.5 E F0 2.5(,t)C(he)-2.5 E F1(<)2.5 E F0
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+ processes run from the shell.)13.23 F(The return status is 0.)144 154.8
+Q F1(trap)108 171.6 Q F0([)2.5 E F1(\255lp)A F0 2.5(][)C([)-2.5 E/F2 10
+/Times-Italic@0 SF(ar)A(g)-.37 E F0(])A F2(sigspec)2.5 E F0(...])2.5 E
+.703(The command)144 183.6 R F2(ar)3.533 E(g)-.37 E F0 .703
+(is to be read and e)3.423 F -.15(xe)-.15 G .702
(cuted when the shell recei).15 F -.15(ve)-.25 G 3.202(ss).15 G
(ignal\(s\))-3.202 E F2(sigspec)3.202 E F0 5.702(.I).31 G(f)-5.702 E F2
(ar)3.532 E(g)-.37 E F0(is)3.422 E .608(absent \(and there is a single)
-144 1
36.8 R F2(sigspec)3.108 E F0 3.108(\)o)C(r)-3.108 E F1<ad>3.108 E
+144 1
95.6 R F2(sigspec)3.108 E F0 3.108(\)o)C(r)-3.108 E F1<ad>3.108 E
F0 3.108(,e)C .608
(ach speci\214ed signal is reset to its original disposition)-3.108 F
-.659(\(the v)144 148.8 R .659(alue it had upon entrance to the shell\).)
+.659(\(the v)144 207.6 R .659(alue it had upon entrance to the shell\).)
-.25 F(If)5.658 E F2(ar)3.488 E(g)-.37 E F0 .658
(is the null string the signal speci\214ed by each)3.378 F F2(sigspec)
-144.34 160.8 Q F0 .58(is ignored by the shell and by the commands it in)
+144.34 219.6 Q F0 .58(is ignored by the shell and by the commands it in)
3.39 F -.2(vo)-.4 G -.1(ke).2 G 3.081(s. If).1 F F2(ar)3.411 E(g)-.37 E
F0 .581(is not present and)3.301 F F1<ad70>3.081 E F0(has)3.081 E 1.215
-(been supplied, then the trap commands associated with each)144 172.8 R
+(been supplied, then the trap commands associated with each)144 231.6 R
F2(sigspec)4.054 E F0 1.214(are displayed.)4.024 F 1.214(If no ar)6.214
-F(gu-)-.18 E .86(ments are supplied or if only)144
184.8 R F1<ad70>3.36
+F(gu-)-.18 E .86(ments are supplied or if only)144
243.6 R F1<ad70>3.36
E F0 .86(is gi)3.36 F -.15(ve)-.25 G(n,).15 E F1(trap)3.36 E F0 .86
(prints the list of commands associated with each)3.36 F 2.83
-(signal. The)144
196.8 R F1<ad6c>2.83 E F0 .33(option causes the shell \
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255.6 R F1<ad6c>2.83 E F0 .33(option causes the shell \
to print a list of signal names and their corresponding num-)2.83 F 4.31
-(bers. Each)144 208.8 R F2(sigspec)4.65 E F0 1.811
+(bers. Each)144 267.6 R F2(sigspec)4.65 E F0 1.811
(is either a signal name de\214ned in <)4.62 F F2(signal.h)A F0 1.811
(>, or a signal number)B 6.811(.S)-.55 G(ignal)-6.811 E
-(names are case insensiti)144 220.8 Q .3 -.15(ve a)-.25 H(nd the).15 E
+(names are case insensiti)144 279.6 Q .3 -.15(ve a)-.25 H(nd the).15 E
/F3 9/Times-Bold@0 SF(SIG)2.5 E F0(pre\214x is optional.)2.25 E 1.649
-(If a)144 238.8 R F2(sigspec)4.489 E F0(is)4.459 E F3(EXIT)4.149 E F0
+(If a)144 297.6 R F2(sigspec)4.489 E F0(is)4.459 E F3(EXIT)4.149 E F0
1.649(\(0\) the command)3.899 F F2(ar)4.479 E(g)-.37 E F0 1.649(is e)
4.369 F -.15(xe)-.15 G 1.649(cuted on e).15 F 1.648(xit from the shell.)
-.15 F 1.648(If a)6.648 F F2(sigspec)4.488 E F0(is)4.458 E F3(DEB)144
-250.8 Q(UG)-.09 E/F4 9/Times-Roman@0 SF(,)A F0 1.167(the command)3.417 F
+309.6 Q(UG)-.09 E/F4 9/Times-Roman@0 SF(,)A F0 1.167(the command)3.417 F
F2(ar)3.997 E(g)-.37 E F0 1.167(is e)3.887 F -.15(xe)-.15 G 1.167
(cuted before e).15 F -.15(ve)-.25 G(ry).15 E F2 1.168(simple command)
3.667 F F0(,)A F2(for)3.668 E F0(command,)3.668 E F2(case)3.668 E F0
-(com-)3.668 E(mand,)144 262.8 Q F2(select)2.647 E F0 .147(command, e)
+(com-)3.668 E(mand,)144 321.6 Q F2(select)2.647 E F0 .147(command, e)
2.647 F -.15(ve)-.25 G .147(ry arithmetic).15 F F2(for)2.647 E F0 .146
(command, and before the \214rst command e)2.647 F -.15(xe)-.15 G .146
-(cutes in a).15 F .145(shell function \(see)144 274.8 R F3 .145
+(cutes in a).15 F .145(shell function \(see)144 333.6 R F3 .145
(SHELL GRAMMAR)2.645 F F0(abo)2.395 E -.15(ve)-.15 G 2.646(\). Refer).15
F .146(to the description of the)2.646 F F1(extdeb)2.646 E(ug)-.2 E F0
-.146(option to)2.646 F(the)144 286.8 Q F1(shopt)3.201 E F0 -.2(bu)3.201
+.146(option to)2.646 F(the)144 345.6 Q F1(shopt)3.201 E F0 -.2(bu)3.201
G .7(iltin for details of its ef).2 F .7(fect on the)-.25 F F1(DEB)3.2 E
(UG)-.1 E F0 3.2(trap. If)3.2 F(a)3.2 E F2(sigspec)3.54 E F0(is)3.51 E
-F3(RETURN)3.2 E F4(,)A F0 .7(the com-)2.95 F(mand)144 298.8 Q F2(ar)
+F3(RETURN)3.2 E F4(,)A F0 .7(the com-)2.95 F(mand)144 357.6 Q F2(ar)
3.473 E(g)-.37 E F0 .643(is e)3.363 F -.15(xe)-.15 G .643
(cuted each time a shell function or a script e).15 F -.15(xe)-.15 G
.644(cuted with the).15 F F1(.)3.144 E F0(or)3.144 E F1(sour)3.144 E(ce)
--.18 E F0 -.2(bu)3.144 G(iltins).2 E(\214nishes e)144 310.8 Q -.15(xe)
--.15 G(cuting.).15 E .929(If a)144 328.8 R F2(sigspec)3.769 E F0(is)
+-.18 E F0 -.2(bu)3.144 G(iltins).2 E(\214nishes e)144 369.6 Q -.15(xe)
+-.15 G(cuting.).15 E .929(If a)144 387.6 R F2(sigspec)3.769 E F0(is)
3.739 E F3(ERR)3.429 E F4(,)A F0 .929(the command)3.179 F F2(ar)3.759 E
(g)-.37 E F0 .929(is e)3.649 F -.15(xe)-.15 G .929(cuted whene).15 F
-.15(ve)-.25 G 3.429(ras).15 G .928(imple command has a non\255zero)
--3.429 F -.15(ex)144 340.8 S 1.008(it status, subject to the follo).15 F
+-3.429 F -.15(ex)144 399.6 S 1.008(it status, subject to the follo).15 F
1.009(wing conditions.)-.25 F(The)6.009 E F3(ERR)3.509 E F0 1.009
(trap is not e)3.259 F -.15(xe)-.15 G 1.009(cuted if the f).15 F 1.009
(ailed com-)-.1 F .324
-(mand is part of the command list immediately follo)144 352.8 R .324
+(mand is part of the command list immediately follo)144 411.6 R .324
(wing a)-.25 F F1(while)2.824 E F0(or)2.824 E F1(until)2.824 E F0 -.1
(ke)2.824 G(yw)-.05 E .324(ord, part of the test)-.1 F .151(in an)144
-364.8 R F2(if)2.661 E F0 .151(statement, part of a command e)4.611 F
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-.15(xe)-.15 G .151(cuted in a).15 F F1(&&)2.651 E F0(or)2.651 E F1(||)
2.651 E F0 .151(list, or if the command')2.651 F 2.651(sr)-.55 G .151
-(eturn v)-2.651 F(alue)-.25 E(is being in)144 376.8 Q -.15(ve)-.4 G
+(eturn v)-2.651 F(alue)-.25 E(is being in)144 435.6 Q -.15(ve)-.4 G
(rted via).15 E F1(!)2.5 E F0 5(.T)C(hese are the same conditions obe)-5
E(yed by the)-.15 E F1(err)2.5 E(exit)-.18 E F0(option.)2.5 E 1.095
(Signals ignored upon entry to the shell cannot be trapped or reset.)144
-394.8 R -.35(Tr)6.095 G 1.095(apped signals that are not).35 F .662
-(being ignored are reset to their original v)144 406.8 R .662
+453.6 R -.35(Tr)6.095 G 1.095(apped signals that are not).35 F .662
+(being ignored are reset to their original v)144 465.6 R .662
(alues in a subshell or subshell en)-.25 F .662(vironment when one is)
--.4 F 2.5(created. The)144 418.8 R(return status is f)2.5 E(alse if an)
+-.4 F 2.5(created. The)144 477.6 R(return status is f)2.5 E(alse if an)
-.1 E(y)-.15 E F2(sigspec)2.84 E F0(is in)2.81 E -.25(va)-.4 G
(lid; otherwise).25 E F1(trap)2.5 E F0(returns true.)2.5 E F1(type)108
-435.6 Q F0([)2.5 E F1(\255aftpP)A F0(])A F2(name)2.5 E F0([)2.5 E F2
-(name)A F0(...])2.5 E -.4(Wi)144 447.6 S .174
+494.4 Q F0([)2.5 E F1(\255aftpP)A F0(])A F2(name)2.5 E F0([)2.5 E F2
+(name)A F0(...])2.5 E -.4(Wi)144 506.4 S .174
(th no options, indicate ho).4 F 2.674(we)-.25 G(ach)-2.674 E F2(name)
3.034 E F0 -.1(wo)2.854 G .173
(uld be interpreted if used as a command name.).1 F .173(If the)5.173 F
-F1<ad74>144 459.6 Q F0 .842(option is used,)3.342 F F1(type)3.342 E F0
+F1<ad74>144 518.4 Q F0 .842(option is used,)3.342 F F1(type)3.342 E F0
.843(prints a string which is one of)3.343 F F2(alias)3.343 E F0(,).27 E
F2 -.1(ke)3.343 G(ywor)-.2 E(d)-.37 E F0(,).77 E F2(function)3.343 E F0
(,).24 E F2 -.2(bu)3.343 G(iltin).2 E F0 3.343(,o).24 G(r)-3.343 E F2
-(\214le)5.253 E F0(if)3.523 E F2(name)144.36 471.6 Q F0 .087
+(\214le)5.253 E F0(if)3.523 E F2(name)144.36 530.4 Q F0 .087
(is an alias, shell reserv)2.767 F .087(ed w)-.15 F .087
(ord, function, b)-.1 F .086(uiltin, or disk \214le, respecti)-.2 F -.15
(ve)-.25 G(ly).15 E 5.086(.I)-.65 G 2.586(ft)-5.086 G(he)-2.586 E F2
(name)2.946 E F0 .086(is not)2.766 F .118
-(found, then nothing is printed, and an e)144 483.6 R .118
+(found, then nothing is printed, and an e)144 542.4 R .118
(xit status of f)-.15 F .118(alse is returned.)-.1 F .119(If the)5.119 F
F1<ad70>2.619 E F0 .119(option is used,)2.619 F F1(type)2.619 E F0 .855
-(either returns the name of the disk \214le that w)144 495.6 R .855
+(either returns the name of the disk \214le that w)144 554.4 R .855
(ould be e)-.1 F -.15(xe)-.15 G .855(cuted if).15 F F2(name)3.715 E F0
.855(were speci\214ed as a com-)3.535 F .64(mand name, or nothing if)144
-507.6 R/F5 10/Courier@0 SF .64(type -t name)3.14 F F0 -.1(wo)3.14 G .641
+566.4 R/F5 10/Courier@0 SF .64(type -t name)3.14 F F0 -.1(wo)3.14 G .641
(uld not return).1 F F2(\214le)3.141 E F0 5.641(.T).18 G(he)-5.641 E F1
<ad50>3.141 E F0 .641(option forces a)3.141 F F3 -.666(PA)3.141 G(TH)
--.189 E F0 .113(search for each)144 519.6 R F2(name)2.613 E F0 2.613(,e)
+-.189 E F0 .113(search for each)144 578.4 R F2(name)2.613 E F0 2.613(,e)
C -.15(ve)-2.863 G 2.613(ni).15 G(f)-2.613 E F5 .113(type -t name)2.613
F F0 -.1(wo)2.613 G .113(uld not return).1 F F2(\214le)2.613 E F0 5.113
(.I).18 G 2.613(fa)-5.113 G .112(command is hashed,)-.001 F F1<ad70>
-2.612 E F0(and)144 5
31.6 Q F1<ad50>2.944 E F0 .444(print the hashed v)
+2.612 E F0(and)144 5
90.4 Q F1<ad50>2.944 E F0 .444(print the hashed v)
2.944 F .444(alue, not necessarily the \214le that appears \214rst in)
-.25 F F3 -.666(PA)2.945 G(TH)-.189 E F4(.)A F0 .445(If the)4.945 F F1
-<ad61>2.945 E F0(option)2.945 E .265(is used,)144 543.6 R F1(type)2.765
+<ad61>2.945 E F0(option)2.945 E .265(is used,)144 602.4 R F1(type)2.765
E F0 .265(prints all of the places that contain an e)2.765 F -.15(xe)
-.15 G .265(cutable named).15 F F2(name)2.765 E F0 5.265(.T).18 G .265
(his includes aliases)-5.265 F .426(and functions, if and only if the)
-144
555.6 R F1<ad70>2.926 E F0 .426(option is not also used.)2.926 F
+144
614.4 R F1<ad70>2.926 E F0 .426(option is not also used.)2.926 F
.427(The table of hashed commands is not)5.426 F .549
-(consulted when using)144
567.6 R F1<ad61>3.049 E F0 5.549(.T)C(he)
+(consulted when using)144
626.4 R F1<ad61>3.049 E F0 5.549(.T)C(he)
-5.549 E F1<ad66>3.049 E F0 .548
(option suppresses shell function lookup, as with the)3.049 F F1
-(command)3.048 E F0 -.2(bu)144 579.6 S(iltin.).2 E F1(type)5 E F0
+(command)3.048 E F0 -.2(bu)144 638.4 S(iltin.).2 E F1(type)5 E F0
(returns true if all of the ar)2.5 E(guments are found, f)-.18 E
-(alse if an)-.1 E 2.5(ya)-.15 G(re not found.)-2.5 E F1(ulimit)108 596.4
+(alse if an)-.1 E 2.5(ya)-.15 G(re not found.)-2.5 E F1(ulimit)108 655.2
Q F0([)2.5 E F1(\255HST)A(abcde\214lmnpqrstuvx)-.92 E F0([)2.5 E F2
-(limit)A F0(]])A(Pro)144 608.4 Q .243(vides control o)-.15 F -.15(ve)
+(limit)A F0(]])A(Pro)144 667.2 Q .243(vides control o)-.15 F -.15(ve)
-.15 G 2.743(rt).15 G .243(he resources a)-2.743 F -.25(va)-.2 G .244
(ilable to the shell and to processes started by it, on systems).25 F
-.944(that allo)144 620.4 R 3.444(ws)-.25 G .944(uch control.)-3.444 F
+.944(that allo)144 679.2 R 3.444(ws)-.25 G .944(uch control.)-3.444 F
(The)5.944 E F1<ad48>3.444 E F0(and)3.444 E F1<ad53>3.444 E F0 .943
(options specify that the hard or soft limit is set for the)3.444 F(gi)
-144 632.4 Q -.15(ve)-.25 G 2.708(nr).15 G 2.708(esource. A)-2.708 F .208
+144 691.2 Q -.15(ve)-.25 G 2.708(nr).15 G 2.708(esource. A)-2.708 F .208
(hard limit cannot be increased by a non-root user once it is set; a so\
-ft limit may)2.708 F .426(be increased up to the v)144 644.4 R .426
+ft limit may)2.708 F .426(be increased up to the v)144 703.2 R .426
(alue of the hard limit.)-.25 F .425(If neither)5.426 F F1<ad48>2.925 E
F0(nor)2.925 E F1<ad53>2.925 E F0 .425
(is speci\214ed, both the soft and)2.925 F .139(hard limits are set.)144
-656.4 R .139(The v)5.139 F .139(alue of)-.25 F F2(limit)2.729 E F0 .139
+715.2 R .139(The v)5.139 F .139(alue of)-.25 F F2(limit)2.729 E F0 .139
(can be a number in the unit speci\214ed for the resource or one)3.319 F
-.742(of the special v)144 668.4 R(alues)-.25 E F1(hard)3.242 E F0(,)A F1
+.742(of the special v)144 727.2 R(alues)-.25 E F1(hard)3.242 E F0(,)A F1
(soft)3.241 E F0 3.241(,o)C(r)-3.241 E F1(unlimited)3.241 E F0 3.241(,w)
-C .741(hich stand for the current hard limit, the current)-3.241 F .78
-(soft limit, and no limit, respecti)144 680.4 R -.15(ve)-.25 G(ly).15 E
-5.78(.I)-.65 G(f)-5.78 E F2(limit)3.37 E F0 .78
-(is omitted, the current v)3.96 F .78(alue of the soft limit of the)-.25
-F .499(resource is printed, unless the)144 692.4 R F1<ad48>2.999 E F0
-.499(option is gi)2.999 F -.15(ve)-.25 G 2.999(n. When).15 F .498
-(more than one resource is speci\214ed, the)2.999 F
-(limit name and unit are printed before the v)144 704.4 Q 2.5
-(alue. Other)-.25 F(options are interpreted as follo)2.5 E(ws:)-.25 E F1
-<ad61>144 716.4 Q F0(All current limits are reported)25.3 E
+C .741(hich stand for the current hard limit, the current)-3.241 F
(GNU Bash-4.0)72 768 Q(2004 Apr 20)148.735 E(20)198.725 E 0 Cg EP
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-(TINS\(1\) B)-.92 F(ASH_B)-.35 E(UIL)-.1 E(TINS\(1\))-.92 E/F1 10
-/Times-Bold@0 SF<ad62>144 84 Q F0(The maximum sock)24.74 E(et b)-.1 E
-(uf)-.2 E(fer size)-.25 E F1<ad63>144 96 Q F0
-(The maximum size of core \214les created)25.86 E F1<ad64>144 108 Q F0
-(The maximum size of a process')24.74 E 2.5(sd)-.55 G(ata se)-2.5 E
-(gment)-.15 E F1<ad65>144 120 Q F0
-(The maximum scheduling priority \("nice"\))25.86 E F1<ad66>144 132 Q F0
+(TINS\(1\) B)-.92 F(ASH_B)-.35 E(UIL)-.1 E(TINS\(1\))-.92 E .78
+(soft limit, and no limit, respecti)144 84 R -.15(ve)-.25 G(ly).15 E
+5.78(.I)-.65 G(f)-5.78 E/F1 10/Times-Italic@0 SF(limit)3.37 E F0 .78
+(is omitted, the current v)3.96 F .78(alue of the soft limit of the)-.25
+F .499(resource is printed, unless the)144 96 R/F2 10/Times-Bold@0 SF
+<ad48>2.999 E F0 .499(option is gi)2.999 F -.15(ve)-.25 G 2.999(n. When)
+.15 F .498(more than one resource is speci\214ed, the)2.999 F
+(limit name and unit are printed before the v)144 108 Q 2.5(alue. Other)
+-.25 F(options are interpreted as follo)2.5 E(ws:)-.25 E F2<ad61>144 120
+Q F0(All current limits are reported)25.3 E F2<ad62>144 132 Q F0
+(The maximum sock)24.74 E(et b)-.1 E(uf)-.2 E(fer size)-.25 E F2<ad63>
+144 144 Q F0(The maximum size of core \214les created)25.86 E F2<ad64>
+144 156 Q F0(The maximum size of a process')24.74 E 2.5(sd)-.55 G
+(ata se)-2.5 E(gment)-.15 E F2<ad65>144 168 Q F0
+(The maximum scheduling priority \("nice"\))25.86 E F2<ad66>144 180 Q F0
(The maximum size of \214les written by the shell and its children)26.97
-E F1<ad69>144 144 Q F0(The maximum number of pending signals)27.52 E F1
-<ad6c>144 156 Q F0(The maximum size that may be lock)27.52 E
-(ed into memory)-.1 E F1<ad6d>144 168 Q F0
+E F2<ad69>144 192 Q F0(The maximum number of pending signals)27.52 E F2
+<ad6c>144 204 Q F0(The maximum size that may be lock)27.52 E
+(ed into memory)-.1 E F2<ad6d>144 216 Q F0
(The maximum resident set size \(man)21.97 E 2.5(ys)-.15 G
-(ystems do not honor this limit\))-2.5 E F1<ad6e>144 180 Q F0 .791(The \
+(ystems do not honor this limit\))-2.5 E F2<ad6e>144 228 Q F0 .791(The \
maximum number of open \214le descriptors \(most systems do not allo)
24.74 F 3.291(wt)-.25 G .791(his v)-3.291 F .791(alue to)-.25 F
-(be set\))180 192 Q F1<ad70>144 204 Q F0
-(The pipe size in 512-byte blocks \(this may not be set\))24.74 E F1
-<ad71>144 216 Q F0(The maximum number of bytes in POSIX message queues)
-24.74 E F1<ad72>144 228 Q F0(The maximum real-time scheduling priority)
-25.86 E F
1<ad73>144 240 Q F0(The maximum stack size)26.41 E F1<ad74>144
-
252 Q F0(The maximum amount of cpu time in seconds)26.97 E F1<ad75>144
-264 Q F0(The maximum number of processes a)24.74 E -.25(va)-.2 G
-(ilable to a single user).25 E F1<ad76>144 276 Q F0 .47
+(be set\))180 240 Q F2<ad70>144 252 Q F0
+(The pipe size in 512-byte blocks \(this may not be set\))24.74 E F2
+<ad71>144 264 Q F0(The maximum number of bytes in POSIX message queues)
+24.74 E F2<ad72>144 276 Q F0(The maximum real-time scheduling priority)
+25.86 E F
2<ad73>144 288 Q F0(The maximum stack size)26.41 E F2<ad74>144
+
300 Q F0(The maximum amount of cpu time in seconds)26.97 E F2<ad75>144
+312 Q F0(The maximum number of processes a)24.74 E -.25(va)-.2 G
+(ilable to a single user).25 E F2<ad76>144 324 Q F0 .47
(The maximum amount of virtual memory a)25.3 F -.25(va)-.2 G .47
-(ilable to the shell and, on some systems, to).25 F(its children)180 288
-Q F1<ad78>144 300 Q F0(The maximum number of \214le locks)25.3 E F1
-<ad54>144 312 Q F0(The maximum number of threads)23.63 E(If)144 328.8 Q
-/F2 10/Times-Italic@0 SF(limit)2.933 E F0 .343(is gi)3.523 F -.15(ve)
--.25 G .343(n, it is the ne).15 F 2.843(wv)-.25 G .343
-(alue of the speci\214ed resource \(the)-3.093 F F
1<ad61>2.843 E F0 .343
+(ilable to the shell and, on some systems, to).25 F(its children)180 336
+Q F2<ad78>144 348 Q F0(The maximum number of \214le locks)25.3 E F2
+<ad54>144 360 Q F0(The maximum number of threads)23.63 E(If)144 376.8 Q
+F1(limit)2.933 E F0 .343(is gi)3.523 F -.15(ve)-.25 G .343
+(n, it is the ne).15 F 2.843(wv)-.25 G .343
+(alue of the speci\214ed resource \(the)-3.093 F F
2<ad61>2.843 E F0 .343
(option is display only\).)2.843 F .343(If no)5.343 F .176(option is gi)
-144 3
40.8 R -.15(ve)-.25 G .176(n, then).15 F F1<ad66>2.676 E F0 .175
+144 3
88.8 R -.15(ve)-.25 G .176(n, then).15 F F2<ad66>2.676 E F0 .175
(is assumed.)2.676 F -1.11(Va)5.175 G .175
-(lues are in 1024-byte increments, e)1.11 F .175(xcept for)-.15 F F1
-<ad74>2.675 E F0 2.675(,w)C .175(hich is in)-2.675 F(seconds,)144 352.8
-Q F
1<ad70>2.515 E F0 2.515(,w)C .015
-(hich is in units of 512-byte blocks, and)-2.515 F F
1<ad54>2.516 E F0(,)
-A F1<ad62>2.516 E F0(,)A F1<ad6e>2.516 E F0 2.516(,a)C(nd)-2.516 E F1
+(lues are in 1024-byte increments, e)1.11 F .175(xcept for)-.15 F F2
+<ad74>2.675 E F0 2.675(,w)C .175(hich is in)-2.675 F(seconds,)144 400.8
+Q F
2<ad70>2.515 E F0 2.515(,w)C .015
+(hich is in units of 512-byte blocks, and)-2.515 F F
2<ad54>2.516 E F0(,)
+A F2<ad62>2.516 E F0(,)A F2<ad6e>2.516 E F0 2.516(,a)C(nd)-2.516 E F2
<ad75>2.516 E F0 2.516(,w)C .016(hich are unscaled v)-2.516 F(al-)-.25 E
-3.788(ues. The)144 364.8 R 1.287(return status is 0 unless an in)3.787 F
+3.788(ues. The)144 412.8 R 1.287(return status is 0 unless an in)3.787 F
-.25(va)-.4 G 1.287(lid option or ar).25 F 1.287
(gument is supplied, or an error occurs)-.18 F(while setting a ne)144
-376.8 Q 2.5(wl)-.25 G(imit.)-2.5 E F1(umask)108 393.6 Q F0([)2.5 E F1
-<ad70>A F0 2.5(][)C F1<ad53>-2.5 E F0 2.5(][)C F2(mode)-2.5 E F0(])A .2
-(The user \214le-creation mask is set to)144 405.6 R F2(mode)2.7 E F0
-5.2(.I).18 G(f)-5.2 E F2(mode)3.08 E F0(be)2.88 E .2
+424.8 Q 2.5(wl)-.25 G(imit.)-2.5 E F2(umask)108 441.6 Q F0([)2.5 E F2
+<ad70>A F0 2.5(][)C F2<ad53>-2.5 E F0 2.5(][)C F1(mode)-2.5 E F0(])A .2
+(The user \214le-creation mask is set to)144 453.6 R F1(mode)2.7 E F0
+5.2(.I).18 G(f)-5.2 E F1(mode)3.08 E F0(be)2.88 E .2
(gins with a digit, it is interpreted as an octal)-.15 F .066(number; o\
therwise it is interpreted as a symbolic mode mask similar to that acce\
-pted by)144 417.6 R F2 -.15(ch)2.566 G(mod).15 E F0(\(1\).).77 E(If)144
-429.6 Q F2(mode)3.262 E F0 .382(is omitted, the current v)3.062 F .382
-(alue of the mask is printed.)-.25 F(The)5.382 E F
1<ad53>2.882 E F0 .382
+pted by)144 465.6 R F1 -.15(ch)2.566 G(mod).15 E F0(\(1\).).77 E(If)144
+477.6 Q F1(mode)3.262 E F0 .382(is omitted, the current v)3.062 F .382
+(alue of the mask is printed.)-.25 F(The)5.382 E F
2<ad53>2.882 E F0 .382
(option causes the mask to be)2.882 F .547
-(printed in symbolic form; the def)144 441.6 R .547
+(printed in symbolic form; the def)144 489.6 R .547
(ault output is an octal number)-.1 F 5.547(.I)-.55 G 3.047(ft)-5.547 G
-(he)-3.047 E F1<ad70>3.047 E F0 .547(option is supplied, and)3.047 F F2
-(mode)144.38 453.6 Q F0 .551
+(he)-3.047 E F2<ad70>3.047 E F0 .547(option is supplied, and)3.047 F F1
+(mode)144.38 501.6 Q F0 .551
(is omitted, the output is in a form that may be reused as input.)3.231
-F .552(The return status is 0 if the)5.552 F(mode w)144 465.6 Q
-(as successfully changed or if no)-.1 E F2(mode)2.5 E F0(ar)2.5 E
-(gument w)-.18 E(as supplied, and f)-.1 E(alse otherwise.)-.1 E F1
-(unalias)108 482.4 Q F0<5bad>2.5 E F1(a)A F0 2.5(][)C F2(name)-2.5 E F0
-(...])2.5 E(Remo)144 494.4 Q 1.955 -.15(ve e)-.15 H(ach).15 E F2(name)
+F .552(The return status is 0 if the)5.552 F(mode w)144 513.6 Q
+(as successfully changed or if no)-.1 E F1(mode)2.5 E F0(ar)2.5 E
+(gument w)-.18 E(as supplied, and f)-.1 E(alse otherwise.)-.1 E F2
+(unalias)108 530.4 Q F0<5bad>2.5 E F2(a)A F0 2.5(][)C F1(name)-2.5 E F0
+(...])2.5 E(Remo)144 542.4 Q 1.955 -.15(ve e)-.15 H(ach).15 E F1(name)
4.155 E F0 1.655(from the list of de\214ned aliases.)4.155 F(If)6.655 E
-F
1<ad61>4.155 E F0 1.655(is supplied, all alias de\214nitions are)4.155
-F(remo)144 506.4 Q -.15(ve)-.15 G 2.5(d. The).15 F(return v)2.5 E
-(alue is true unless a supplied)-.25 E F2(name)2.86 E F0
-(is not a de\214ned alias.)2.68 E F1(unset)108 523.2 Q F0<5bad>2.5 E F1
-(fv)A F0 2.5(][)C F2(name)-2.5 E F0(...])2.5 E -.15(Fo)144 535.2 S 3.106
-(re).15 G(ach)-3.106 E F2(name)3.106 E F0 3.106(,r).18 G(emo)-3.106 E
+F
2<ad61>4.155 E F0 1.655(is supplied, all alias de\214nitions are)4.155
+F(remo)144 554.4 Q -.15(ve)-.15 G 2.5(d. The).15 F(return v)2.5 E
+(alue is true unless a supplied)-.25 E F1(name)2.86 E F0
+(is not a de\214ned alias.)2.68 E F2(unset)108 571.2 Q F0<5bad>2.5 E F2
+(fv)A F0 2.5(][)C F1(name)-2.5 E F0(...])2.5 E -.15(Fo)144 583.2 S 3.106
+(re).15 G(ach)-3.106 E F1(name)3.106 E F0 3.106(,r).18 G(emo)-3.106 E
.906 -.15(ve t)-.15 H .606(he corresponding v).15 F .607
(ariable or function.)-.25 F .607(If no options are supplied, or the)
-5.607 F F1<ad76>144 547.2 Q F0 .305(option is gi)2.805 F -.15(ve)-.25 G
-.305(n, each).15 F F2(name)3.165 E F0 .305(refers to a shell v)2.985 F
+5.607 F F2<ad76>144 595.2 Q F0 .305(option is gi)2.805 F -.15(ve)-.25 G
+.305(n, each).15 F F1(name)3.165 E F0 .305(refers to a shell v)2.985 F
2.805(ariable. Read-only)-.25 F -.25(va)2.805 G .304
-(riables may not be unset.).25 F(If)5.304 E F1<ad66>144 559.2 Q F0 .459
-(is speci\214ed, each)2.959 F F2(name)3.319 E F0 .459
+(riables may not be unset.).25 F(If)5.304 E F2<ad66>144 607.2 Q F0 .459
+(is speci\214ed, each)2.959 F F1(name)3.319 E F0 .459
(refers to a shell function, and the function de\214nition is remo)3.139
-F -.15(ve)-.15 G 2.96(d. Each).15 F .903(unset v)144 571.2 R .903
+F -.15(ve)-.15 G 2.96(d. Each).15 F .903(unset v)144 619.2 R .903
(ariable or function is remo)-.25 F -.15(ve)-.15 G 3.402(df).15 G .902
(rom the en)-3.402 F .902(vironment passed to subsequent commands.)-.4 F
-(If)5.902 E(an)144 583.2 Q 6.915(yo)-.15 G(f)-6.915 E/F3 9/Times-Bold@0
+(If)5.902 E(an)144 631.2 Q 6.915(yo)-.15 G(f)-6.915 E/F3 9/Times-Bold@0
SF(COMP_W)6.915 E(ORDBREAKS)-.09 E/F4 9/Times-Roman@0 SF(,)A F3(RANDOM)
6.665 E F4(,)A F3(SECONDS)6.665 E F4(,)A F3(LINENO)6.665 E F4(,)A F3
(HISTCMD)6.666 E F4(,)A F3(FUNCN)6.666 E(AME)-.18 E F4(,)A F3(GR)144
-595.2 Q(OUPS)-.27 E F4(,)A F0(or)2.523 E F3(DIRST)2.773 E -.495(AC)-.81
+643.2 Q(OUPS)-.27 E F4(,)A F0(or)2.523 E F3(DIRST)2.773 E -.495(AC)-.81
G(K).495 E F0 .272(are unset, the)2.522 F 2.772(yl)-.15 G .272
(ose their special properties, e)-2.772 F -.15(ve)-.25 G 2.772(ni).15 G
2.772(ft)-2.772 G(he)-2.772 E 2.772(ya)-.15 G .272(re subsequently)
--2.772 F 2.5(reset. The)144 607.2 R -.15(ex)2.5 G
-(it status is true unless a).15 E F2(name)2.86 E F0(is readonly)2.68 E
-(.)-.65 E F1(wait)108 624 Q F0([)2.5 E F2 2.5(n.)C(..)-2.5 E F0(])A -.8
-(Wa)144 636 S .288
+-2.772 F 2.5(reset. The)144 655.2 R -.15(ex)2.5 G
+(it status is true unless a).15 E F1(name)2.86 E F0(is readonly)2.68 E
+(.)-.65 E F2(wait)108 672 Q F0([)2.5 E F1 2.5(n.)C(..)-2.5 E F0(])A -.8
+(Wa)144 684 S .288
(it for each speci\214ed process and return its termination status.).8 F
-(Each)5.288 E F2(n)3.148 E F0 .288(may be a process ID or a)3.028 F .722
-(job speci\214cation; if a job spec is gi)144 648 R -.15(ve)-.25 G .722
+(Each)5.288 E F1(n)3.148 E F0 .288(may be a process ID or a)3.028 F .722
+(job speci\214cation; if a job spec is gi)144 696 R -.15(ve)-.25 G .722
(n, all processes in that job').15 F 3.222(sp)-.55 G .722(ipeline are w)
--3.222 F .722(aited for)-.1 F 5.722(.I)-.55 G(f)-5.722 E F2(n)3.582 E F0
-(is)3.462 E 1.265(not gi)144 660 R -.15(ve)-.25 G 1.265
+-3.222 F .722(aited for)-.1 F 5.722(.I)-.55 G(f)-5.722 E F1(n)3.582 E F0
+(is)3.462 E 1.265(not gi)144 708 R -.15(ve)-.25 G 1.265
(n, all currently acti).15 F 1.565 -.15(ve c)-.25 H 1.265
(hild processes are w).15 F 1.265(aited for)-.1 F 3.765(,a)-.4 G 1.266
-(nd the return status is zero.)-3.765 F(If)6.266 E F2(n)4.126 E F0 .457
-(speci\214es a non-e)144 672 R .457
+(nd the return status is zero.)-3.765 F(If)6.266 E F1(n)4.126 E F0 .457
+(speci\214es a non-e)144 720 R .457
(xistent process or job, the return status is 127.)-.15 F .457
-(Otherwise, the return status is the)5.457 F -.15(ex)144 684 S
-(it status of the last process or job w).15 E(aited for)-.1 E(.)-.55 E
-/F5 10.95/Times-Bold@0 SF(SEE ALSO)72 700.8 Q F0(bash\(1\), sh\(1\))108
-712.8 Q(GNU Bash-4.0)72 768 Q(2004 Apr 20)148.735 E(21)198.725 E 0 Cg EP
+(Otherwise, the return status is the)5.457 F(GNU Bash-4.0)72 768 Q
+(2004 Apr 20)148.735 E(21)198.725 E 0 Cg EP
+%%Page: 22 22
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF -.35(BA)72 48 S(SH_B).35 E(UIL)-.1 E 290.48
+(TINS\(1\) B)-.92 F(ASH_B)-.35 E(UIL)-.1 E(TINS\(1\))-.92 E -.15(ex)144
+84 S(it status of the last process or job w).15 E(aited for)-.1 E(.)-.55
+E/F1 10.95/Times-Bold@0 SF(SEE ALSO)72 100.8 Q F0(bash\(1\), sh\(1\))108
+112.8 Q(GNU Bash-4.0)72 768 Q(2004 Apr 20)148.735 E(22)198.725 E 0 Cg EP
%%Trailer
end
%%EOF
%!PS-Adobe-3.0
%%Creator: groff version 1.19.2
-%%CreationDate: Tue Dec 7 16:12:42 2010
+%%CreationDate: Tue Dec 28 14:30:24 2010
%%DocumentNeededResources: font Times-Roman
%%+ font Times-Bold
%%DocumentSuppliedResources: procset grops 1.19 2
Copyright (C) 1988-2010 Free Software Foundation, Inc.
@end ignore
-@set LASTCHANGE Wed Oct 20 21:37:22 EDT 2010
+@set LASTCHANGE Tue Dec 28 13:41:22 EST 2010
@set EDITION 4.2
@set VERSION 4.2
-@set UPDATED 20 October 2010
-@set UPDATED-MONTH October 2010
+@set UPDATED 28 December 2010
+@set UPDATED-MONTH December 2010
invert = (command->flags & CMD_INVERT_RETURN) != 0;
ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
- last_command_exit_value = wait_for (paren_pid);
+ exec_result = wait_for (paren_pid);
/* If we have to, invert the return value. */
if (invert)
- exec_result = ((last_command_exit_value == EXECUTION_SUCCESS)
+ exec_result = ((exec_result == EXECUTION_SUCCESS)
? EXECUTION_FAILURE
: EXECUTION_SUCCESS);
- else
- exec_result = last_command_exit_value;
+ last_command_exit_value = exec_result;
if (user_subshell && was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
{
- last_command_exit_value = exec_result;
save_line_number = line_number;
line_number = line_number_for_err_trap;
run_error_trap ();
if (user_subshell && ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
{
- last_command_exit_value = exec_result;
run_pending_traps ();
jump_to_top_level (ERREXIT);
}
- return (last_command_exit_value = exec_result);
+ return (last_command_exit_value);
}
else
{
}
else
{
+ /* Don't let simple commands that aren't the last command in a
+ pipeline change $? for the rest of the pipeline (or at all). */
+ if (pipe_out != NO_PIPE)
+ result = last_command_exit_value;
close_pipes (pipe_in, pipe_out);
#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
unlink_fifo_list ();
hookf = find_function (NOTFOUND_HOOK);
if (hookf == 0)
{
+ /* Make sure filenames are displayed using printable characters */
+ if (ansic_shouldquote (pathname))
+ pathname = ansic_quote (pathname, 0, NULL);
internal_error (_("%s: command not found"), pathname);
exit (EX_NOTFOUND); /* Posix.2 says the exit status is 127 */
}
dup_error (pipe_in, 0);
if (pipe_in > 0)
close (pipe_in);
+#ifdef __CYGWIN__
+ /* Let stdio know the fd may have changed from text to binary mode. */
+ freopen (NULL, "r", stdin);
+#endif /* __CYGWIN__ */
}
if (pipe_out != NO_PIPE)
{
if (dup2 (1, 2) < 0)
dup_error (1, 2);
}
+#ifdef __CYGWIN__
+ /* Let stdio know the fd may have changed from text to binary mode, and
+ make sure to preserve stdout line buffering. */
+ freopen (NULL, "w", stdout);
+ sh_setlinebuf (stdout);
+#endif /* __CYGWIN__ */
}
}
invert = (command->flags & CMD_INVERT_RETURN) != 0;
ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
- last_command_exit_value = wait_for (paren_pid);
+ exec_result = wait_for (paren_pid);
/* If we have to, invert the return value. */
if (invert)
- exec_result = ((last_command_exit_value == EXECUTION_SUCCESS)
+ exec_result = ((exec_result == EXECUTION_SUCCESS)
? EXECUTION_FAILURE
: EXECUTION_SUCCESS);
- else
- exec_result = last_command_exit_value;
+ last_command_exit_value = exec_result;
if (user_subshell && was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
{
- last_command_exit_value = exec_result;
save_line_number = line_number;
line_number = line_number_for_err_trap;
run_error_trap ();
if (user_subshell && ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
{
- last_command_exit_value = exec_result;
run_pending_traps ();
jump_to_top_level (ERREXIT);
}
- return (last_command_exit_value = exec_result);
+ return (last_command_exit_value);
}
else
{
if (redirection_undo_list)
{
+ /* XXX - why copy here? */
my_undo_list = (REDIRECT *)copy_redirects (redirection_undo_list);
dispose_redirects (redirection_undo_list);
redirection_undo_list = (REDIRECT *)NULL;
if (exec_redirection_undo_list)
{
+ /* XXX - why copy here? */
exec_undo_list = (REDIRECT *)copy_redirects (exec_redirection_undo_list);
dispose_redirects (exec_redirection_undo_list);
exec_redirection_undo_list = (REDIRECT *)NULL;
}
else
{
+ /* Don't let simple commands that aren't the last command in a
+ pipeline change $? for the rest of the pipeline (or at all). */
+ if (pipe_out != NO_PIPE)
+ result = last_command_exit_value;
close_pipes (pipe_in, pipe_out);
#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
unlink_fifo_list ();
hookf = find_function (NOTFOUND_HOOK);
if (hookf == 0)
{
+ /* Make sure filenames are displayed using printable characters */
+ if (ansic_shouldquote (pathname))
+ pathname = ansic_quote (pathname, 0, NULL);
internal_error (_("%s: command not found"), pathname);
exit (EX_NOTFOUND); /* Posix.2 says the exit status is 127 */
}
dup_error (pipe_in, 0);
if (pipe_in > 0)
close (pipe_in);
+#ifdef __CYGWIN__
+ /* Let stdio know the fd may have changed from text to binary mode. */
+ freopen (NULL, "r", stdin);
+#endif /* __CYGWIN__ */
}
if (pipe_out != NO_PIPE)
{
if (dup2 (1, 2) < 0)
dup_error (1, 2);
}
+#ifdef __CYGWIN__
+ /* Let stdio know the fd may have changed from text to binary mode, and
+ make sure to preserve stdout line buffering. */
+ freopen (NULL, "w", stdout);
+ sh_setlinebuf (stdout);
+#endif /* __CYGWIN__ */
}
}
# endif
#endif
+/* Make sure O_BINARY and O_TEXT are defined to avoid Windows-specific code. */
+#if !defined (O_BINARY)
+# define O_BINARY 0
+#endif
+#if !defined (O_TEXT)
+# define O_TEXT 0
+#endif
+
#endif /* ! _FILECNTL_H_ */
--- /dev/null
+/* filecntl.h - Definitions to set file descriptors to close-on-exec. */
+
+/* Copyright (C) 1993 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if !defined (_FILECNTL_H_)
+#define _FILECNTL_H_
+
+#include <fcntl.h>
+
+/* Definitions to set file descriptors to close-on-exec, the Posix way. */
+#if !defined (FD_CLOEXEC)
+#define FD_CLOEXEC 1
+#endif
+
+#define FD_NCLOEXEC 0
+
+#define SET_CLOSE_ON_EXEC(fd) (fcntl ((fd), F_SETFD, FD_CLOEXEC))
+#define SET_OPEN_ON_EXEC(fd) (fcntl ((fd), F_SETFD, FD_NCLOEXEC))
+
+/* How to open a file in non-blocking mode, the Posix.1 way. */
+#if !defined (O_NONBLOCK)
+# if defined (O_NDELAY)
+# define O_NONBLOCK O_NDELAY
+# else
+# define O_NONBLOCK 0
+# endif
+#endif
+
+#endif /* ! _FILECNTL_H_ */
bp->b_used = bp->b_inputp = bp->b_flag = 0;
if (bufsize == 1)
bp->b_flag |= B_UNBUFF;
+ if (O_TEXT && (fcntl (fd, F_GETFL) & O_TEXT) != 0)
+ bp->b_flag |= O_TEXT;
return (bp);
}
}
/* Return 1 if a seek on FD will succeed. */
-#ifndef __CYGWIN__
-# define fd_is_seekable(fd) (lseek ((fd), 0L, SEEK_CUR) >= 0)
-#else
-# define fd_is_seekable(fd) 0
-#endif /* __CYGWIN__ */
+#define fd_is_seekable(fd) (lseek ((fd), 0L, SEEK_CUR) >= 0)
/* Take FD, a file descriptor, and create and return a buffered stream
corresponding to it. If something is wrong and the file descriptor
BUFFERED_STREAM *bp;
{
ssize_t nr;
+ off_t o;
CHECK_TERMSIG;
- nr = zread (bp->b_fd, bp->b_buffer, bp->b_size);
+ /* In an environment where text and binary files are treated differently,
+ compensate for lseek() on text files returning an offset different from
+ the count of characters read() returns. Text-mode streams have to be
+ treated as unbuffered. */
+ if ((bp->b_flag & (B_TEXT | B_UNBUFF)) == B_TEXT)
+ {
+ o = lseek (bp->b_fd, 0, SEEK_CUR);
+ nr = zread (bp->b_fd, bp->b_buffer, bp->b_size);
+ if (nr > 0 && nr < lseek (bp->b_fd, 0, SEEK_CUR) - o)
+ {
+ lseek (bp->b_fd, o, SEEK_SET);
+ bp->b_flag |= B_UNBUFF;
+ bp->b_size = 1;
+ nr = zread (bp->b_fd, bp->b_buffer, bp->b_size);
+ }
+ }
+ else
+ nr = zread (bp->b_fd, bp->b_buffer, bp->b_size);
if (nr <= 0)
{
bp->b_used = 0;
return (EOF);
}
-#if defined (__CYGWIN__)
- /* If on cygwin, translate \r\n to \n. */
- if (nr >= 2 && bp->b_buffer[nr - 2] == '\r' && bp->b_buffer[nr - 1] == '\n')
- {
- bp->b_buffer[nr - 2] = '\n';
- nr--;
- }
-#endif
-
bp->b_used = nr;
bp->b_inputp = 0;
return (bp->b_buffer[bp->b_inputp++] & 0xFF);
--- /dev/null
+/* input.c -- functions to perform buffered input with synchronization. */
+
+/* Copyright (C) 1992-2009 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include "bashtypes.h"
+#if !defined (_MINIX) && defined (HAVE_SYS_FILE_H)
+# include <sys/file.h>
+#endif
+#include "filecntl.h"
+#include "posixstat.h"
+#include <stdio.h>
+#include <errno.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include "bashansi.h"
+#include "bashintl.h"
+
+#include "command.h"
+#include "general.h"
+#include "input.h"
+#include "error.h"
+#include "externs.h"
+#include "quit.h"
+
+#if !defined (errno)
+extern int errno;
+#endif /* !errno */
+
+#if defined (EAGAIN)
+# define X_EAGAIN EAGAIN
+#else
+# define X_EAGAIN -99
+#endif
+
+#if defined (EWOULDBLOCK)
+# define X_EWOULDBLOCK EWOULDBLOCK
+#else
+# define X_EWOULDBLOCK -99
+#endif
+
+extern void termsig_handler __P((int));
+
+/* Functions to handle reading input on systems that don't restart read(2)
+ if a signal is received. */
+
+static char localbuf[128];
+static int local_index = 0, local_bufused = 0;
+
+/* Posix and USG systems do not guarantee to restart read () if it is
+ interrupted by a signal. We do the read ourselves, and restart it
+ if it returns EINTR. */
+int
+getc_with_restart (stream)
+ FILE *stream;
+{
+ unsigned char uc;
+
+ CHECK_TERMSIG;
+
+ /* Try local buffering to reduce the number of read(2) calls. */
+ if (local_index == local_bufused || local_bufused == 0)
+ {
+ while (1)
+ {
+ CHECK_TERMSIG;
+ local_bufused = read (fileno (stream), localbuf, sizeof(localbuf));
+ if (local_bufused > 0)
+ break;
+ else if (errno == X_EAGAIN || errno == X_EWOULDBLOCK)
+ {
+ if (sh_unset_nodelay_mode (fileno (stream)) < 0)
+ {
+ sys_error (_("cannot reset nodelay mode for fd %d"), fileno (stream));
+ return EOF;
+ }
+ continue;
+ }
+ else if (local_bufused == 0 || errno != EINTR)
+ {
+ local_index = 0;
+ return EOF;
+ }
+ }
+ local_index = 0;
+ }
+ uc = localbuf[local_index++];
+ return uc;
+}
+
+int
+ungetc_with_restart (c, stream)
+ int c;
+ FILE *stream;
+{
+ if (local_index == 0 || c == EOF)
+ return EOF;
+ localbuf[--local_index] = c;
+ return c;
+}
+
+#if defined (BUFFERED_INPUT)
+
+/* A facility similar to stdio, but input-only. */
+
+#if defined (USING_BASH_MALLOC)
+# define MAX_INPUT_BUFFER_SIZE 8176
+#else
+# define MAX_INPUT_BUFFER_SIZE 8192
+#endif
+
+#if !defined (SEEK_CUR)
+# define SEEK_CUR 1
+#endif /* !SEEK_CUR */
+
+#ifdef max
+# undef max
+#endif
+#define max(a, b) (((a) > (b)) ? (a) : (b))
+#ifdef min
+# undef min
+#endif
+#define min(a, b) ((a) > (b) ? (b) : (a))
+
+extern int interactive_shell;
+
+int bash_input_fd_changed;
+
+/* This provides a way to map from a file descriptor to the buffer
+ associated with that file descriptor, rather than just the other
+ way around. This is needed so that buffers are managed properly
+ in constructs like 3<&4. buffers[x]->b_fd == x -- that is how the
+ correspondence is maintained. */
+static BUFFERED_STREAM **buffers = (BUFFERED_STREAM **)NULL;
+static int nbuffers;
+
+#define ALLOCATE_BUFFERS(n) \
+ do { if ((n) >= nbuffers) allocate_buffers (n); } while (0)
+
+/* Make sure `buffers' has at least N elements. */
+static void
+allocate_buffers (n)
+ int n;
+{
+ register int i, orig_nbuffers;
+
+ orig_nbuffers = nbuffers;
+ nbuffers = n + 20;
+ buffers = (BUFFERED_STREAM **)xrealloc
+ (buffers, nbuffers * sizeof (BUFFERED_STREAM *));
+
+ /* Zero out the new buffers. */
+ for (i = orig_nbuffers; i < nbuffers; i++)
+ buffers[i] = (BUFFERED_STREAM *)NULL;
+}
+
+/* Construct and return a BUFFERED_STREAM corresponding to file descriptor
+ FD, using BUFFER. */
+static BUFFERED_STREAM *
+make_buffered_stream (fd, buffer, bufsize)
+ int fd;
+ char *buffer;
+ size_t bufsize;
+{
+ BUFFERED_STREAM *bp;
+
+ bp = (BUFFERED_STREAM *)xmalloc (sizeof (BUFFERED_STREAM));
+ ALLOCATE_BUFFERS (fd);
+ buffers[fd] = bp;
+ bp->b_fd = fd;
+ bp->b_buffer = buffer;
+ bp->b_size = bufsize;
+ bp->b_used = bp->b_inputp = bp->b_flag = 0;
+ if (bufsize == 1)
+ bp->b_flag |= B_UNBUFF;
+ if (O_TEXT && (fcntl (fd, F_GETFL) & O_TEXT) != 0)
+ bp->b_flag |= O_TEXT;
+ return (bp);
+}
+
+/* Allocate a new BUFFERED_STREAM, copy BP to it, and return the new copy. */
+static BUFFERED_STREAM *
+copy_buffered_stream (bp)
+ BUFFERED_STREAM *bp;
+{
+ BUFFERED_STREAM *nbp;
+
+ if (!bp)
+ return ((BUFFERED_STREAM *)NULL);
+
+ nbp = (BUFFERED_STREAM *)xmalloc (sizeof (BUFFERED_STREAM));
+ xbcopy ((char *)bp, (char *)nbp, sizeof (BUFFERED_STREAM));
+ return (nbp);
+}
+
+int
+set_bash_input_fd (fd)
+ int fd;
+{
+ if (bash_input.type == st_bstream)
+ bash_input.location.buffered_fd = fd;
+ else if (interactive_shell == 0)
+ default_buffered_input = fd;
+ return 0;
+}
+
+int
+fd_is_bash_input (fd)
+ int fd;
+{
+ if (bash_input.type == st_bstream && bash_input.location.buffered_fd == fd)
+ return 1;
+ else if (interactive_shell == 0 && default_buffered_input == fd)
+ return 1;
+ return 0;
+}
+
+/* Save the buffered stream corresponding to file descriptor FD (which bash
+ is using to read input) to a buffered stream associated with NEW_FD. If
+ NEW_FD is -1, a new file descriptor is allocated with fcntl. The new
+ file descriptor is returned on success, -1 on error. */
+int
+save_bash_input (fd, new_fd)
+ int fd, new_fd;
+{
+ int nfd;
+
+ /* Sync the stream so we can re-read from the new file descriptor. We
+ might be able to avoid this by copying the buffered stream verbatim
+ to the new file descriptor. */
+ if (buffers[fd])
+ sync_buffered_stream (fd);
+
+ /* Now take care of duplicating the file descriptor that bash is
+ using for input, so we can reinitialize it later. */
+ nfd = (new_fd == -1) ? fcntl (fd, F_DUPFD, 10) : new_fd;
+ if (nfd == -1)
+ {
+ if (fcntl (fd, F_GETFD, 0) == 0)
+ sys_error (_("cannot allocate new file descriptor for bash input from fd %d"), fd);
+ return -1;
+ }
+
+ if (buffers[nfd])
+ {
+ /* What's this? A stray buffer without an associated open file
+ descriptor? Free up the buffer and report the error. */
+ internal_error (_("save_bash_input: buffer already exists for new fd %d"), nfd);
+ free_buffered_stream (buffers[nfd]);
+ }
+
+ /* Reinitialize bash_input.location. */
+ if (bash_input.type == st_bstream)
+ {
+ bash_input.location.buffered_fd = nfd;
+ fd_to_buffered_stream (nfd);
+ close_buffered_fd (fd); /* XXX */
+ }
+ else
+ /* If the current input type is not a buffered stream, but the shell
+ is not interactive and therefore using a buffered stream to read
+ input (e.g. with an `eval exec 3>output' inside a script), note
+ that the input fd has been changed. pop_stream() looks at this
+ value and adjusts the input fd to the new value of
+ default_buffered_input accordingly. */
+ bash_input_fd_changed++;
+
+ if (default_buffered_input == fd)
+ default_buffered_input = nfd;
+
+ SET_CLOSE_ON_EXEC (nfd);
+ return nfd;
+}
+
+/* Check that file descriptor FD is not the one that bash is currently
+ using to read input from a script. FD is about to be duplicated onto,
+ which means that the kernel will close it for us. If FD is the bash
+ input file descriptor, we need to seek backwards in the script (if
+ possible and necessary -- scripts read from stdin are still unbuffered),
+ allocate a new file descriptor to use for bash input, and re-initialize
+ the buffered stream. Make sure the file descriptor used to save bash
+ input is set close-on-exec. Returns 0 on success, -1 on failure. This
+ works only if fd is > 0 -- if fd == 0 and bash is reading input from
+ fd 0, save_bash_input is used instead, to cooperate with input
+ redirection (look at redir.c:add_undo_redirect()). */
+int
+check_bash_input (fd)
+ int fd;
+{
+ if (fd_is_bash_input (fd))
+ {
+ if (fd > 0)
+ return ((save_bash_input (fd, -1) == -1) ? -1 : 0);
+ else if (fd == 0)
+ return ((sync_buffered_stream (fd) == -1) ? -1 : 0);
+ }
+ return 0;
+}
+
+/* This is the buffered stream analogue of dup2(fd1, fd2). The
+ BUFFERED_STREAM corresponding to fd2 is deallocated, if one exists.
+ BUFFERS[fd1] is copied to BUFFERS[fd2]. This is called by the
+ redirect code for constructs like 4<&0 and 3</etc/rc.local. */
+int
+duplicate_buffered_stream (fd1, fd2)
+ int fd1, fd2;
+{
+ int is_bash_input, m;
+
+ if (fd1 == fd2)
+ return 0;
+
+ m = max (fd1, fd2);
+ ALLOCATE_BUFFERS (m);
+
+ /* If FD2 is the file descriptor bash is currently using for shell input,
+ we need to do some extra work to make sure that the buffered stream
+ actually exists (it might not if fd1 was not active, and the copy
+ didn't actually do anything). */
+ is_bash_input = (bash_input.type == st_bstream) &&
+ (bash_input.location.buffered_fd == fd2);
+
+ if (buffers[fd2])
+ {
+ /* If the two objects share the same b_buffer, don't free it. */
+ if (buffers[fd1] && buffers[fd1]->b_buffer && buffers[fd1]->b_buffer == buffers[fd2]->b_buffer)
+ buffers[fd2] = (BUFFERED_STREAM *)NULL;
+ else
+ free_buffered_stream (buffers[fd2]);
+ }
+ buffers[fd2] = copy_buffered_stream (buffers[fd1]);
+ if (buffers[fd2])
+ buffers[fd2]->b_fd = fd2;
+
+ if (is_bash_input)
+ {
+ if (!buffers[fd2])
+ fd_to_buffered_stream (fd2);
+ buffers[fd2]->b_flag |= B_WASBASHINPUT;
+ }
+
+ return (fd2);
+}
+
+/* Return 1 if a seek on FD will succeed. */
+#ifndef __CYGWIN__
+# define fd_is_seekable(fd) (lseek ((fd), 0L, SEEK_CUR) >= 0)
+#else
+# define fd_is_seekable(fd) 0
+#endif /* __CYGWIN__ */
+
+/* Take FD, a file descriptor, and create and return a buffered stream
+ corresponding to it. If something is wrong and the file descriptor
+ is invalid, return a NULL stream. */
+BUFFERED_STREAM *
+fd_to_buffered_stream (fd)
+ int fd;
+{
+ char *buffer;
+ size_t size;
+ struct stat sb;
+
+ if (fstat (fd, &sb) < 0)
+ {
+ close (fd);
+ return ((BUFFERED_STREAM *)NULL);
+ }
+
+ size = (fd_is_seekable (fd)) ? min (sb.st_size, MAX_INPUT_BUFFER_SIZE) : 1;
+ if (size == 0)
+ size = 1;
+ buffer = (char *)xmalloc (size);
+
+ return (make_buffered_stream (fd, buffer, size));
+}
+
+/* Return a buffered stream corresponding to FILE, a file name. */
+BUFFERED_STREAM *
+open_buffered_stream (file)
+ char *file;
+{
+ int fd;
+
+ fd = open (file, O_RDONLY);
+ return ((fd >= 0) ? fd_to_buffered_stream (fd) : (BUFFERED_STREAM *)NULL);
+}
+
+/* Deallocate a buffered stream and free up its resources. Make sure we
+ zero out the slot in BUFFERS that points to BP. */
+void
+free_buffered_stream (bp)
+ BUFFERED_STREAM *bp;
+{
+ int n;
+
+ if (!bp)
+ return;
+
+ n = bp->b_fd;
+ if (bp->b_buffer)
+ free (bp->b_buffer);
+ free (bp);
+ buffers[n] = (BUFFERED_STREAM *)NULL;
+}
+
+/* Close the file descriptor associated with BP, a buffered stream, and free
+ up the stream. Return the status of closing BP's file descriptor. */
+int
+close_buffered_stream (bp)
+ BUFFERED_STREAM *bp;
+{
+ int fd;
+
+ if (!bp)
+ return (0);
+ fd = bp->b_fd;
+ free_buffered_stream (bp);
+ return (close (fd));
+}
+
+/* Deallocate the buffered stream associated with file descriptor FD, and
+ close FD. Return the status of the close on FD. */
+int
+close_buffered_fd (fd)
+ int fd;
+{
+ if (fd < 0)
+ {
+ errno = EBADF;
+ return -1;
+ }
+ if (fd >= nbuffers || !buffers || !buffers[fd])
+ return (close (fd));
+ return (close_buffered_stream (buffers[fd]));
+}
+
+/* Make the BUFFERED_STREAM associcated with buffers[FD] be BP, and return
+ the old BUFFERED_STREAM. */
+BUFFERED_STREAM *
+set_buffered_stream (fd, bp)
+ int fd;
+ BUFFERED_STREAM *bp;
+{
+ BUFFERED_STREAM *ret;
+
+ ret = buffers[fd];
+ buffers[fd] = bp;
+ return ret;
+}
+
+/* Read a buffer full of characters from BP, a buffered stream. */
+static int
+b_fill_buffer (bp)
+ BUFFERED_STREAM *bp;
+{
+ ssize_t nr;
+
+ CHECK_TERMSIG;
+ nr = zread (bp->b_fd, bp->b_buffer, bp->b_size);
+ if (nr <= 0)
+ {
+ bp->b_used = 0;
+ bp->b_buffer[0] = 0;
+ if (nr == 0)
+ bp->b_flag |= B_EOF;
+ else
+ bp->b_flag |= B_ERROR;
+ return (EOF);
+ }
+
+#if defined (__CYGWIN__)
+ /* If on cygwin, translate \r\n to \n. */
+ if (nr >= 2 && bp->b_buffer[nr - 2] == '\r' && bp->b_buffer[nr - 1] == '\n')
+ {
+ bp->b_buffer[nr - 2] = '\n';
+ nr--;
+ }
+#endif
+
+ bp->b_used = nr;
+ bp->b_inputp = 0;
+ return (bp->b_buffer[bp->b_inputp++] & 0xFF);
+}
+
+/* Get a character from buffered stream BP. */
+#define bufstream_getc(bp) \
+ (bp->b_inputp == bp->b_used || !bp->b_used) \
+ ? b_fill_buffer (bp) \
+ : bp->b_buffer[bp->b_inputp++] & 0xFF
+
+/* Push C back onto buffered stream BP. */
+static int
+bufstream_ungetc(c, bp)
+ int c;
+ BUFFERED_STREAM *bp;
+{
+ if (c == EOF || bp->b_inputp == 0)
+ return (EOF);
+
+ bp->b_buffer[--bp->b_inputp] = c;
+ return (c);
+}
+
+/* Seek backwards on file BFD to synchronize what we've read so far
+ with the underlying file pointer. */
+int
+sync_buffered_stream (bfd)
+ int bfd;
+{
+ BUFFERED_STREAM *bp;
+ off_t chars_left;
+
+ if (buffers == 0 || (bp = buffers[bfd]) == 0)
+ return (-1);
+
+ chars_left = bp->b_used - bp->b_inputp;
+ if (chars_left)
+ lseek (bp->b_fd, -chars_left, SEEK_CUR);
+ bp->b_used = bp->b_inputp = 0;
+ return (0);
+}
+
+int
+buffered_getchar ()
+{
+ CHECK_TERMSIG;
+
+#if !defined (DJGPP)
+ return (bufstream_getc (buffers[bash_input.location.buffered_fd]));
+#else
+ /* On DJGPP, ignore \r. */
+ int ch;
+ while ((ch = bufstream_getc (buffers[bash_input.location.buffered_fd])) == '\r')
+ ;
+ return ch;
+#endif
+}
+
+int
+buffered_ungetchar (c)
+ int c;
+{
+ return (bufstream_ungetc (c, buffers[bash_input.location.buffered_fd]));
+}
+
+/* Make input come from file descriptor BFD through a buffered stream. */
+void
+with_input_from_buffered_stream (bfd, name)
+ int bfd;
+ char *name;
+{
+ INPUT_STREAM location;
+ BUFFERED_STREAM *bp;
+
+ location.buffered_fd = bfd;
+ /* Make sure the buffered stream exists. */
+ bp = fd_to_buffered_stream (bfd);
+ init_yy_io (bp == 0 ? return_EOF : buffered_getchar,
+ buffered_ungetchar, st_bstream, name, location);
+}
+
+#if defined (TEST)
+void *
+xmalloc(s)
+int s;
+{
+ return (malloc (s));
+}
+
+void *
+xrealloc(s, size)
+char *s;
+int size;
+{
+ if (!s)
+ return(malloc (size));
+ else
+ return(realloc (s, size));
+}
+
+void
+init_yy_io ()
+{
+}
+
+process(bp)
+BUFFERED_STREAM *bp;
+{
+ int c;
+
+ while ((c = bufstream_getc(bp)) != EOF)
+ putchar(c);
+}
+
+BASH_INPUT bash_input;
+
+struct stat dsb; /* can be used from gdb */
+
+/* imitate /bin/cat */
+main(argc, argv)
+int argc;
+char **argv;
+{
+ register int i;
+ BUFFERED_STREAM *bp;
+
+ if (argc == 1) {
+ bp = fd_to_buffered_stream (0);
+ process(bp);
+ exit(0);
+ }
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] == '-' && argv[i][1] == '\0') {
+ bp = fd_to_buffered_stream (0);
+ if (!bp)
+ continue;
+ process(bp);
+ free_buffered_stream (bp);
+ } else {
+ bp = open_buffered_stream (argv[i]);
+ if (!bp)
+ continue;
+ process(bp);
+ close_buffered_stream (bp);
+ }
+ }
+ exit(0);
+}
+#endif /* TEST */
+#endif /* BUFFERED_INPUT */
#define B_ERROR 0x02
#define B_UNBUFF 0x04
#define B_WASBASHINPUT 0x08
+#define B_TEXT 0x10
/* A buffered stream. Like a FILE *, but with our own buffering and
synchronization. Look in input.c for the implementation. */
--- /dev/null
+/* input.h -- Structures and unions used for reading input. */
+
+/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if !defined (_INPUT_H_)
+#define _INPUT_H_
+
+#include "stdc.h"
+
+/* Function pointers can be declared as (Function *)foo. */
+#if !defined (_FUNCTION_DEF)
+# define _FUNCTION_DEF
+typedef int Function ();
+typedef void VFunction ();
+typedef char *CPFunction (); /* no longer used */
+typedef char **CPPFunction (); /* no longer used */
+#endif /* _FUNCTION_DEF */
+
+typedef int sh_cget_func_t __P((void)); /* sh_ivoidfunc_t */
+typedef int sh_cunget_func_t __P((int)); /* sh_intfunc_t */
+
+enum stream_type {st_none, st_stdin, st_stream, st_string, st_bstream};
+
+#if defined (BUFFERED_INPUT)
+
+/* Possible values for b_flag. */
+#undef B_EOF
+#undef B_ERROR /* There are some systems with this define */
+#undef B_UNBUFF
+
+#define B_EOF 0x01
+#define B_ERROR 0x02
+#define B_UNBUFF 0x04
+#define B_WASBASHINPUT 0x08
+
+/* A buffered stream. Like a FILE *, but with our own buffering and
+ synchronization. Look in input.c for the implementation. */
+typedef struct BSTREAM
+{
+ int b_fd;
+ char *b_buffer; /* The buffer that holds characters read. */
+ size_t b_size; /* How big the buffer is. */
+ size_t b_used; /* How much of the buffer we're using, */
+ int b_flag; /* Flag values. */
+ size_t b_inputp; /* The input pointer, index into b_buffer. */
+} BUFFERED_STREAM;
+
+#if 0
+extern BUFFERED_STREAM **buffers;
+#endif
+
+extern int default_buffered_input;
+
+#endif /* BUFFERED_INPUT */
+
+typedef union {
+ FILE *file;
+ char *string;
+#if defined (BUFFERED_INPUT)
+ int buffered_fd;
+#endif
+} INPUT_STREAM;
+
+typedef struct {
+ enum stream_type type;
+ char *name;
+ INPUT_STREAM location;
+ sh_cget_func_t *getter;
+ sh_cunget_func_t *ungetter;
+} BASH_INPUT;
+
+extern BASH_INPUT bash_input;
+
+/* Functions from parse.y whose use directly or indirectly depends on the
+ definitions in this file. */
+extern void initialize_bash_input __P((void));
+extern void init_yy_io __P((sh_cget_func_t *, sh_cunget_func_t *, enum stream_type, const char *, INPUT_STREAM));
+extern char *yy_input_name __P((void));
+extern void with_input_from_stdin __P((void));
+extern void with_input_from_string __P((char *, const char *));
+extern void with_input_from_stream __P((FILE *, const char *));
+extern void push_stream __P((int));
+extern void pop_stream __P((void));
+extern int stream_on_stack __P((enum stream_type));
+extern char *read_secondary_line __P((int));
+extern int find_reserved_word __P((char *));
+extern void gather_here_documents __P((void));
+extern void execute_variable_command __P((char *, char *));
+
+extern int *save_token_state __P((void));
+extern void restore_token_state __P((int *));
+
+/* Functions from input.c */
+extern int getc_with_restart __P((FILE *));
+extern int ungetc_with_restart __P((int, FILE *));
+
+#if defined (BUFFERED_INPUT)
+/* Functions from input.c. */
+extern int fd_is_bash_input __P((int));
+extern int set_bash_input_fd __P((int));
+extern int save_bash_input __P((int, int));
+extern int check_bash_input __P((int));
+extern int duplicate_buffered_stream __P((int, int));
+extern BUFFERED_STREAM *fd_to_buffered_stream __P((int));
+extern BUFFERED_STREAM *set_buffered_stream __P((int, BUFFERED_STREAM *));
+extern BUFFERED_STREAM *open_buffered_stream __P((char *));
+extern void free_buffered_stream __P((BUFFERED_STREAM *));
+extern int close_buffered_stream __P((BUFFERED_STREAM *));
+extern int close_buffered_fd __P((int));
+extern int sync_buffered_stream __P((int));
+extern int buffered_getchar __P((void));
+extern int buffered_ungetchar __P((int));
+extern void with_input_from_buffered_stream __P((int, char *));
+#endif /* BUFFERED_INPUT */
+
+#endif /* _INPUT_H_ */
/* We aren't done yet. We also support the "~user" syntax. */
- /* Save the version of the directory that the user typed. */
- users_dirname = savestring (dirname);
+ /* Save the version of the directory that the user typed, dequoting
+ it if necessary. */
+ if (rl_completion_found_quote && rl_filename_dequoting_function)
+ users_dirname = (*rl_filename_dequoting_function) (dirname, rl_completion_quote_character);
+ else
+ users_dirname = savestring (dirname);
if (*dirname == '~')
{
if (rl_directory_rewrite_hook)
(*rl_directory_rewrite_hook) (&dirname);
- /* The directory completion hook should perform any necessary
- dequoting. */
- if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&dirname))
+ /* We have saved the possibly-dequoted version of the directory name
+ the user typed. Now transform the directory name we're going to
+ pass to opendir(2). The directory completion hook should perform
+ any necessary dequoting. If the directory completion hook returns
+ 0, it should not modify the directory name pointer passed as an
+ argument. */
+ else if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&dirname))
{
xfree (users_dirname);
users_dirname = savestring (dirname);
temp = (*rl_filename_dequoting_function) (dirname, rl_completion_quote_character);
xfree (dirname);
dirname = temp;
- xfree (users_dirname);
- users_dirname = savestring (dirname);
}
directory = opendir (dirname);
/* We aren't done yet. We also support the "~user" syntax. */
- /* Save the version of the directory that the user typed. */
- users_dirname = savestring (dirname);
+ /* Save the version of the directory that the user typed, dequoting
+ it if necessary. */
+ if (rl_completion_found_quote && rl_filename_dequoting_function)
+ users_dirname = (*rl_filename_dequoting_function) (dirname, rl_completion_quote_character);
+ else
+ users_dirname = savestring (dirname);
if (*dirname == '~')
{
if (rl_directory_rewrite_hook)
(*rl_directory_rewrite_hook) (&dirname);
- /* The directory completion hook should perform any necessary
- dequoting. */
+ /* We have saved the possibly-dequoted version of the directory name
+ the user typed. Now transform the directory name we're going to
+ pass to opendir(2). The directory completion hook should perform
+ any necessary dequoting. If the directory completion hook returns
+ 0, it should not modify the directory name pointer passed as an
+ argument. */
if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&dirname))
- {
- xfree (users_dirname);
- users_dirname = savestring (dirname);
- }
+ ;
else if (rl_completion_found_quote && rl_filename_dequoting_function)
{
/* delete single and double quotes */
@deftypevar {rl_icppfunc_t *} rl_directory_completion_hook
This function, if defined, is allowed to modify the directory portion
-of filenames Readline completes. It is called with the address of a
-string (the current directory name) as an argument, and may modify that string.
+of filenames Readline completes.
+It could be used to expand symbolic links or shell variables in pathnames.
+It is called with the address of a string (the current directory name) as an
+argument, and may modify that string.
If the string is replaced with a new string, the old value should be freed.
Any modified directory name should have a trailing slash.
-The modified value will be displayed as part of the completion, replacing
+The modified value will be used as part of the completion, replacing
the directory portion of the pathname the user typed.
-It returns an integer that should be non-zero if the function modifies
-its directory argument.
-It could be used to expand symbolic links or shell variables in pathnames.
At the least, even if no other expansion is performed, this function should
remove any quote characters from the directory name, because its result will
be passed directly to @code{opendir()}.
+The directory completion hook returns an integer that should be non-zero if
+the function modifies its directory argument.
+The function should not modify the directory argument if it returns 0.
@end deftypevar
@ignore
displayed when the possible completions are printed or inserted. It is
called before rl_directory_completion_hook.
-I'm not happy with how this worksyet, so it's undocumented.
+I'm not happy with how this works yet, so it's undocumented.
@end deftypevar
@end ignore
in the consistency of user interface across discrete programs that need
to provide a command line interface.
-Copyright (C) 1988-2007 Free Software Foundation, Inc.
+Copyright (C) 1988--2010 Free Software Foundation, Inc.
Permission is granted to make and distribute verbatim copies of
this manual provided the copyright notice and this permission notice
@deftypevar {rl_icppfunc_t *} rl_directory_completion_hook
This function, if defined, is allowed to modify the directory portion
-of filenames Readline completes. It is called with the address of a
+of filenames Readline completes.
+It could be used to expand symbolic links or shell variables in pathnames.
+It is called with the address of a
string (the current directory name) as an argument, and may modify that string.
If the string is replaced with a new string, the old value should be freed.
Any modified directory name should have a trailing slash.
-The modified value will be displayed as part of the completion, replacing
+The modified value may be used as part of the completion, replacing
the directory portion of the pathname the user typed.
-It returns an integer that should be non-zero if the function modifies
-its directory argument.
-It could be used to expand symbolic links or shell variables in pathnames.
At the least, even if no other expansion is performed, this function should
remove any quote characters from the directory name, because its result will
be passed directly to @code{opendir()}.
+The directory completion hook returns an integer that should be non-zero if
+the function modifies its directory argument.
+The function should not modify the directory argument if it returns 0.
@end deftypevar
@ignore
displayed when the possible completions are printed or inserted. It is
called before rl_directory_completion_hook.
-I'm not happy with how this worksyet, so it's undocumented.
+I'm not happy with how this works yet, so it's undocumented.
@end deftypevar
@end ignore
static int tcap_initialized;
-#if !defined (__linux__)
+#if !defined (__linux__) && !defined (NCURSES_VERSION)
# if defined (__EMX__) || defined (NEED_EXTERN_PC)
extern
# endif /* __EMX__ || NEED_EXTERN_PC */
char PC, *BC, *UP;
-#endif /* __linux__ */
+#endif /* !__linux__ && !NCURSES_VERSION */
/* Some strings to control terminal actions. These are output by tputs (). */
char *_rl_term_clreol;
extern int errno;
#endif
-#define BASEOPENFLAGS (O_CREAT | O_TRUNC | O_EXCL)
+#define BASEOPENFLAGS (O_CREAT | O_TRUNC | O_EXCL | O_BINARY)
#define DEFAULT_TMPDIR "." /* bogus default, should be changed */
#define DEFAULT_NAMEROOT "shtmp"
--- /dev/null
+/*
+ * tmpfile.c - functions to create and safely open temp files for the shell.
+ */
+
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#include <bashtypes.h>
+#include <posixstat.h>
+#include <posixtime.h>
+#include <filecntl.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+
+#include <shell.h>
+
+#ifndef errno
+extern int errno;
+#endif
+
+#define BASEOPENFLAGS (O_CREAT | O_TRUNC | O_EXCL)
+
+#define DEFAULT_TMPDIR "." /* bogus default, should be changed */
+#define DEFAULT_NAMEROOT "shtmp"
+
+extern pid_t dollar_dollar_pid;
+
+static char *get_sys_tmpdir __P((void));
+static char *get_tmpdir __P((int));
+
+static char *sys_tmpdir = (char *)NULL;
+static int ntmpfiles;
+static int tmpnamelen = -1;
+static unsigned long filenum = 1L;
+
+static char *
+get_sys_tmpdir ()
+{
+ if (sys_tmpdir)
+ return sys_tmpdir;
+
+#ifdef P_tmpdir
+ sys_tmpdir = P_tmpdir;
+ if (file_iswdir (sys_tmpdir))
+ return sys_tmpdir;
+#endif
+
+ sys_tmpdir = "/tmp";
+ if (file_iswdir (sys_tmpdir))
+ return sys_tmpdir;
+
+ sys_tmpdir = "/var/tmp";
+ if (file_iswdir (sys_tmpdir))
+ return sys_tmpdir;
+
+ sys_tmpdir = "/usr/tmp";
+ if (file_iswdir (sys_tmpdir))
+ return sys_tmpdir;
+
+ sys_tmpdir = DEFAULT_TMPDIR;
+
+ return sys_tmpdir;
+}
+
+static char *
+get_tmpdir (flags)
+ int flags;
+{
+ char *tdir;
+
+ tdir = (flags & MT_USETMPDIR) ? get_string_value ("TMPDIR") : (char *)NULL;
+ if (tdir && (file_iswdir (tdir) == 0 || strlen (tdir) > PATH_MAX))
+ tdir = 0;
+
+ if (tdir == 0)
+ tdir = get_sys_tmpdir ();
+
+#if defined (HAVE_PATHCONF) && defined (_PC_NAME_MAX)
+ if (tmpnamelen == -1)
+ tmpnamelen = pathconf (tdir, _PC_NAME_MAX);
+#else
+ tmpnamelen = 0;
+#endif
+
+ return tdir;
+}
+
+char *
+sh_mktmpname (nameroot, flags)
+ char *nameroot;
+ int flags;
+{
+ char *filename, *tdir, *lroot;
+ struct stat sb;
+ int r, tdlen;
+
+ filename = (char *)xmalloc (PATH_MAX + 1);
+ tdir = get_tmpdir (flags);
+ tdlen = strlen (tdir);
+
+ lroot = nameroot ? nameroot : DEFAULT_NAMEROOT;
+
+#ifdef USE_MKTEMP
+ sprintf (filename, "%s/%s.XXXXXX", tdir, lroot);
+ if (mktemp (filename) == 0)
+ {
+ free (filename);
+ filename = NULL;
+ }
+#else /* !USE_MKTEMP */
+ while (1)
+ {
+ filenum = (filenum << 1) ^
+ (unsigned long) time ((time_t *)0) ^
+ (unsigned long) dollar_dollar_pid ^
+ (unsigned long) ((flags & MT_USERANDOM) ? get_random_number () : ntmpfiles++);
+ sprintf (filename, "%s/%s-%lu", tdir, lroot, filenum);
+ if (tmpnamelen > 0 && tmpnamelen < 32)
+ filename[tdlen + 1 + tmpnamelen] = '\0';
+# ifdef HAVE_LSTAT
+ r = lstat (filename, &sb);
+# else
+ r = stat (filename, &sb);
+# endif
+ if (r < 0 && errno == ENOENT)
+ break;
+ }
+#endif /* !USE_MKTEMP */
+
+ return filename;
+}
+
+int
+sh_mktmpfd (nameroot, flags, namep)
+ char *nameroot;
+ int flags;
+ char **namep;
+{
+ char *filename, *tdir, *lroot;
+ int fd, tdlen;
+
+ filename = (char *)xmalloc (PATH_MAX + 1);
+ tdir = get_tmpdir (flags);
+ tdlen = strlen (tdir);
+
+ lroot = nameroot ? nameroot : DEFAULT_NAMEROOT;
+
+#ifdef USE_MKSTEMP
+ sprintf (filename, "%s/%s.XXXXXX", tdir, lroot);
+ fd = mkstemp (filename);
+ if (fd < 0 || namep == 0)
+ {
+ free (filename);
+ filename = NULL;
+ }
+ if (namep)
+ *namep = filename;
+ return fd;
+#else /* !USE_MKSTEMP */
+ do
+ {
+ filenum = (filenum << 1) ^
+ (unsigned long) time ((time_t *)0) ^
+ (unsigned long) dollar_dollar_pid ^
+ (unsigned long) ((flags & MT_USERANDOM) ? get_random_number () : ntmpfiles++);
+ sprintf (filename, "%s/%s-%lu", tdir, lroot, filenum);
+ if (tmpnamelen > 0 && tmpnamelen < 32)
+ filename[tdlen + 1 + tmpnamelen] = '\0';
+ fd = open (filename, BASEOPENFLAGS | ((flags & MT_READWRITE) ? O_RDWR : O_WRONLY), 0600);
+ }
+ while (fd < 0 && errno == EEXIST);
+
+ if (namep)
+ *namep = filename;
+ else
+ free (filename);
+
+ return fd;
+#endif /* !USE_MKSTEMP */
+}
+
+FILE *
+sh_mktmpfp (nameroot, flags, namep)
+ char *nameroot;
+ int flags;
+ char **namep;
+{
+ int fd;
+ FILE *fp;
+
+ fd = sh_mktmpfd (nameroot, flags, namep);
+ if (fd < 0)
+ return ((FILE *)NULL);
+ fp = fdopen (fd, (flags & MT_READWRITE) ? "w+" : "w");
+ if (fp == 0)
+ close (fd);
+ return fp;
+}
report_syntax_error (message)
char *message;
{
- char *msg;
+ char *msg, *p;
if (message)
{
parser's complaining about by looking at current_token. */
if (current_token != 0 && EOF_Reached == 0 && (msg = error_token_from_token (current_token)))
{
+ if (ansic_shouldquote (msg))
+ {
+ p = ansic_quote (msg, 0, NULL);
+ free (msg);
+ msg = p;
+ }
parser_error (line_number, _("syntax error near unexpected token `%s'"), msg);
free (msg);
return ret;
}
-/* XXX - this needs to handle functionality like subst.c:no_longjmp_on_fatal_error;
- maybe extract_command_subst should handle it. */
+/* Recursively call the parser to parse a $(...) command substitution. */
char *
xparse_dolparen (base, string, indp, flags)
char *base;
/* In an attempt to avoid races, we close the first fd only after opening
the second. */
/* Make the document really temporary. Also make it the input. */
- fd2 = open (filename, O_RDONLY, 0600);
+ fd2 = open (filename, O_RDONLY|O_BINARY, 0600);
if (fd2 < 0)
{
if (unlink (filename) < 0)
{
r = errno;
-#if defined (__CYGWIN__)
- /* Under CygWin 1.1.0, the unlink will fail if the file is
- open. This hack will allow the previous action of silently
- ignoring the error, but will still leave the file there. This
- needs some kind of magic. */
- if (r == EACCES)
- return (fd2);
-#endif /* __CYGWIN__ */
close (fd2);
free (filename);
errno = r;
if ((r) < 0) \
{ \
if (fd >= 0) \
- close (fd); \
+ close (fd); \
last_command_exit_value = EXECUTION_FAILURE;\
return ((e) == 0 ? EINVAL : (e));\
} \
if (unlink (filename) < 0)
{
r = errno;
-#if defined (__CYGWIN__)
- /* Under CygWin 1.1.0, the unlink will fail if the file is
- open. This hack will allow the previous action of silently
- ignoring the error, but will still leave the file there. This
- needs some kind of magic. */
- if (r == EACCES)
- return (fd2);
-#endif /* __CYGWIN__ */
close (fd2);
free (filename);
errno = r;
if (redirect->rflags & REDIR_VARASSIGN)
{
redirector = fcntl (fd, F_DUPFD, SHELL_FD_BASE); /* XXX try this for now */
- REDIRECTION_ERROR (redirector, errno, fd);
+ r = errno;
+ if (redirector < 0)
+ sys_error (_("redirection error: cannot duplicate fd"));
+ REDIRECTION_ERROR (redirector, r, fd);
}
if (flags & RX_UNDOABLE)
if (redirect->rflags & REDIR_VARASSIGN)
{
redirector = fcntl (fd, F_DUPFD, SHELL_FD_BASE); /* XXX try this for now */
- REDIRECTION_ERROR (redirector, errno, fd);
+ r = errno;
+ if (redirector < 0)
+ sys_error (_("redirection error: cannot duplicate fd"));
+ REDIRECTION_ERROR (redirector, r, fd);
}
if (flags & RX_ACTIVE)
if ((flags & RX_ACTIVE) && (redirect->rflags & REDIR_VARASSIGN))
{
redirector = fcntl (redir_fd, F_DUPFD, SHELL_FD_BASE); /* XXX try this for now */
- REDIRECTION_ERROR (redirector, errno, -1);
+ r = errno;
+ if (redirector < 0)
+ sys_error (_("redirection error: cannot duplicate fd"));
+ REDIRECTION_ERROR (redirector, r, -1);
}
if ((flags & RX_ACTIVE) && (redir_fd != redirector))
since we're going to use it later (e.g., make sure we don't save fd 0
to fd 10 if we have a redirection like 0<&10). If the value of fdbase
puts the process over its fd limit, causing fcntl to fail, we try
- again with SHELL_FD_BASE. */
+ again with SHELL_FD_BASE. Return 0 on success, -1 on error. */
static int
add_undo_redirect (fd, ri, fdbase)
int fd;
}
/* Set up to close FD when we are finished with the current command
- and its redirections. */
+ and its redirections. Return 0 on success, -1 on error. */
static int
add_undo_close_redirect (fd)
int fd;
not match with ours. */
fd = move_to_high_fd (fd, 1, -1);
-#if defined (__CYGWIN__) && defined (O_TEXT)
- setmode (fd, O_TEXT);
-#endif
-
#if defined (BUFFERED_INPUT)
default_buffered_input = fd;
SET_CLOSE_ON_EXEC (default_buffered_input);
int code;
code = setjmp (top_level);
-itrace("run_one_command: setjmp: code = %d", code);
+
if (code != NOT_JUMPED)
{
#if defined (PROCESS_SUBSTITUTION)
unlink_fifo_list ();
#endif /* PROCESS_SUBSTITUTION */
-itrace("run_one_command: code = %d", code);
switch (code)
{
/* Some kind of throw to top_level has occured. */
for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-#ifdef __CYGWIN__
- setmode (fd, O_TEXT); /* we don't want CR/LF, we want Unix-style */
-#endif
-
/* Read the output of the command through the pipe. This may need to be
changed to understand multibyte characters in the future. */
while (1)
(fildes[0] != fileno (stderr)))
close (fildes[0]);
+#ifdef __CYGWIN__
+ /* Let stdio know the fd may have changed from text to binary mode, and
+ make sure to preserve stdout line buffering. */
+ freopen (NULL, "w", stdout);
+ sh_setlinebuf (stdout);
+#endif /* __CYGWIN__ */
+
/* The currently executing shell is not interactive. */
interactive = 0;
#if defined (HANDLE_MULTIBYTE)
if (MB_CUR_MAX > 1)
{
+#if 0
slen = STRLEN (string);
mslen = MBSLEN (string);
plen = STRLEN (pat);
mplen = MBSLEN (pat);
if (slen == mslen && plen == mplen)
+#else
+ if (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0)
+#endif
return (match_upattern (string, pat, mtype, sp, ep));
n = xdupmbstowcs (&wpat, NULL, pat);
for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-#ifdef __CYGWIN__
- setmode (fd, O_TEXT); /* we don't want CR/LF, we want Unix-style */
-#endif
-
/* Read the output of the command through the pipe. This may need to be
changed to understand multibyte characters in the future. */
while (1)
1
testb
expand_aliases on
+1
+1
+1
+1
+0
+0
+0
+0
after
--- /dev/null
+# make sure commands before the last one in the pipeline can't change $?
+false
+false | echo $?
+false
+(false) | echo $?
+
+false
+true | echo $?
+false
+(true) | echo $?
+
+true
+false | echo $?
+true
+(false) | echo $?
+
+true
+true | echo $?
+true
+(true) | echo $?
${THIS_SH} -i ./exec8.sub
+${THIS_SH} ./exec9.sub
+
true | `echo true` &
echo after
projects / thirdparty / bash.git / commitdiff
