limit is such that the shell can't duplicate to a file descriptor
>= 10. Fixes a limitation that tripped a coreutils test reported
by Paul Eggert <eggert@cs.ucla.edu>
+
+ 11/19
+ -----
+doc/{bash.1,bashref.texi},lib/readline/doc/hsuser.texi
+ - make it clear that bash runs HISTFILESIZE=$HISTSIZE after reading
+ the startup files
+ - make it clear that bash runs HISTSIZE=500 after reading the
+ startup files
+ - make it clear that setting HISTSIZE=0 causes commands to not be
+ saved in the history list
+ - make it clear that setting HISTFILESIZE=0 causes the history file
+ to be truncated to zero size
+
+variables.c
+ - sv_histsize: change so setting HISTSIZE to a value less than 0
+ causes the history to be `unstifled'
+ - sv_histsize: change so setting HISTFILESIZE to a value less than 0
+ results in no file truncation
+ - make it clear that numeric values less than 0 for HISTFILESIZE or
+ HISTSIZE inhibit the usual functions
if the RX_SAVEFD flag is set
- add_undo_redirect: set the RX_SAVEFD flag if the file descriptor
limit is such that the shell can't duplicate to a file descriptor
- >= 10
+ >= 10. Fixes a limitation that tripped a coreutils test reported
+ by Paul Eggert <eggert@cs.ucla.edu>
+ 11/19
+ -----
+doc/{bash.1,bashref.texi},lib/readline/doc/hsuser.texi
+ - make it clear that bash runs HISTFILESIZE=$HISTSIZE after reading
+ the startup files
+ - make it clear that bash runs HISTSIZE=500 after reading the
+ startup files
+ - make it clear that setting HISTSIZE=0 causes commands to not be
+ saved in the history list
+ - make it clear that setting HISTFILESIZE=0 causes the history file
+ to be truncated to zero size
+ - make it clear that numeric values less than 0 for HISTFILESIZE or
+ HISTSIZE are treated the same as 0
tests/comsub-posix3.sub f
tests/cond.tests f
tests/cond.right f
-tests/cond-regexp.sub f
+tests/cond-regexp1.sub f
+tests/cond-regexp2.sub f
tests/coproc.tests f
tests/coproc.right f
tests/cprint.tests f
--- /dev/null
+#
+# Master distribution manifest for bash
+#
+#
+# Filename type
+#
+CWRU d
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+builtins d
+cross-build d
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+tests/misc d
+ABOUT-NLS f
+ChangeLog s CWRU/changelog
+CHANGES f
+COMPAT f
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.\" Case Western Reserve University
.\" chet@po.cwru.edu
.\"
-.\" Last Change: Sat Nov 12 13:34:37 EST 2011
+.\" Last Change: Sat Nov 19 15:15:30 EST 2011
.\"
.\" bash_builtins, strip all but Built-Ins section
.if \n(zZ=1 .ig zZ
.if \n(zY=1 .ig zY
-.TH BASH 1 "2011 November 12" "GNU Bash 4.2"
+.TH BASH 1 "2011 November 19" "GNU Bash 4.2"
.\"
.\" There's some problem with having a `@'
.\" in a tagged paragraph with the BSD man macros.
.B HISTFILESIZE
The maximum number of lines contained in the history file. When this
variable is assigned a value, the history file is truncated, 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
+necessary,
+to contain no more than that number of lines by removing the oldest entries.
+The history file is also truncated to this size after
writing it when an interactive shell exits.
+If the value is 0, the history file is truncated to zero size.
+Numeric values less than zero inhibit truncation.
+The shell sets the default value to the value of \fBHISTSIZE\fP
+after reading any startup files.
.TP
.B HISTIGNORE
A colon-separated list of patterns used to decide which command lines
The number of commands to remember in the command history (see
.SM
.B HISTORY
-below). The default value is 500.
+below).
+If the value is 0, commands are not saved in the history list.
+Numeric values less than zero result in every command being saved
+on the history list (there is no limit).
+The shell sets the default value to 500 after reading any startup files.
.TP
.B HISTTIMEFORMAT
If this variable is set and not null, its value is used as a format string
the number of lines specified by the value of
.SM
.BR HISTFILESIZE .
+If \fBHISTFILESIZE\fP is unset, or set to null, a non-numeric value,
+or a numeric value less than zero, the history file is not truncated.
When the history file is read,
lines beginning with the history comment character followed immediately
by a digit are interpreted as timestamps for the preceding history line.
.\" Case Western Reserve University
.\" chet@po.cwru.edu
.\"
-.\" Last Change: Sat Nov 12 13:34:37 EST 2011
+.\" Last Change: Sat Nov 19 15:15:30 EST 2011
.\"
.\" bash_builtins, strip all but Built-Ins section
.if \n(zZ=1 .ig zZ
.if \n(zY=1 .ig zY
-.TH BASH 1 "2011 November 12" "GNU Bash 4.2"
+.TH BASH 1 "2011 November 19" "GNU Bash 4.2"
.\"
.\" There's some problem with having a `@'
.\" in a tagged paragraph with the BSD man macros.
of alphabetic characters.
Any part of the pattern may be quoted to force the quoted portion
to be matched as a string.
+Bracket expressions in regular expressions must be treated carefully,
+since normal quoting characters lose their meanings between brackets.
If the pattern is stored in a shell variable, quoting the variable
expansion forces the entire pattern to be matched as a string.
Substrings matched by parenthesized subexpressions within the regular
.B HISTFILESIZE
The maximum number of lines contained in the history file. When this
variable is assigned a value, the history file is truncated, 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
+necessary,
+to contain no more than that number of lines by removing the oldest entries.
+The history file is also truncated to this size after
writing it when an interactive shell exits.
+If the value is 0, the history file is truncated to zero size.
+Numeric values less than zero are treated as 0.
+The shell sets the default value to the value of \fBHISTSIZE\fP
+after reading any startup files.
.TP
.B HISTIGNORE
A colon-separated list of patterns used to decide which command lines
The number of commands to remember in the command history (see
.SM
.B HISTORY
-below). The default value is 500.
+below).
+If the value is 0, commands are not saved in the history list.
+Numeric values less than zero result in every command being saved
+on the history list (there is no limit).
+The shell sets the default value to 500 after reading any startup files.
.TP
.B HISTTIMEFORMAT
If this variable is set and not null, its value is used as a format string
the number of lines specified by the value of
.SM
.BR HISTFILESIZE .
+If \fBHISTFILESIZE\fP is unset, or set to a null or non-numeric value,
+the history file is not truncated.
When the history file is read,
lines beginning with the history comment character followed immediately
by a digit are interpreted as timestamps for the preceding history line.
default value is @file{~/.bash_history}.
@item HISTFILESIZE
-The maximum number of lines contained in the history file. When this
-variable is assigned a value, the history file is truncated, if
-necessary, by removing the oldest entries,
-to contain no more than that number of lines.
+The maximum number of lines contained in the history file.
+When this variable is assigned a value, the history file is truncated,
+if necessary, to contain no more than that number of lines
+by removing the oldest entries.
The history file is also truncated to this size after
writing it when an interactive shell exits.
-The default value is 500.
+If the value is 0, the history file is truncated to zero size.
+Numeric values less than zero inhibit truncation.
+The shell sets the default value to the value of @env{HISTSIZE}
+after reading any startup files.
@item HISTIGNORE
A colon-separated list of patterns used to decide which command
@item HISTSIZE
The maximum number of commands to remember on the history list.
-The default value is 500.
+If the value is 0, commands are not saved in the history list.
+Numeric values less than zero result in every command being saved
+on the history list (there is no limit).
+The shell sets the default value to 500 after reading any startup files.
@item HISTTIMEFORMAT
If this variable is set and not null, its value is used as a format string
of alphabetic characters.
Any part of the pattern may be quoted to force the quoted portion
to be matched as a string.
+Bracket expressions in regular expressions must be treated carefully,
+since normal quoting characters lose their meanings between brackets.
If the pattern is stored in a shell variable, quoting the variable
expansion forces the entire pattern to be matched as a string.
Substrings matched by parenthesized subexpressions within the regular
default value is @file{~/.bash_history}.
@item HISTFILESIZE
-The maximum number of lines contained in the history file. When this
-variable is assigned a value, the history file is truncated, if
-necessary, by removing the oldest entries,
-to contain no more than that number of lines.
+The maximum number of lines contained in the history file.
+When this variable is assigned a value, the history file is truncated,
+if necessary, to contain no more than that number of lines
+by removing the oldest entries.
The history file is also truncated to this size after
writing it when an interactive shell exits.
-The default value is 500.
+If the value is 0, the history file is truncated to zero size.
+Numeric values less than zero are treated as 0.
+The shell sets the default value to the value of @env{HISTSIZE}
+after reading any startup files.
@item HISTIGNORE
A colon-separated list of patterns used to decide which command
@item HISTSIZE
The maximum number of commands to remember on the history list.
-The default value is 500.
+If the value is 0, commands are not saved in the history list.
+Numeric values less than zero are treated as 0.
+The shell sets the default value to 500 after reading any startup files.
@item HISTTIMEFORMAT
If this variable is set and not null, its value is used as a format string
Copyright (C) 1988-2011 Free Software Foundation, Inc.
@end ignore
-@set LASTCHANGE Sat Nov 12 13:35:12 EST 2011
+@set LASTCHANGE Sat Sat Nov 19 15:15:12 EST 2011
@set EDITION 4.2
@set VERSION 4.2
-@set UPDATED 12 November 2011
+@set UPDATED 19 November 2011
@set UPDATED-MONTH November 2011
Copyright (C) 1988-2011 Free Software Foundation, Inc.
@end ignore
-@set LASTCHANGE Mon Oct 24 08:43:33 EDT 2011
+@set LASTCHANGE Sat Nov 12 13:35:12 EST 2011
@set EDITION 4.2
@set VERSION 4.2
-@set UPDATED 24 October 2011
-@set UPDATED-MONTH October 2011
+@set UPDATED 12 November 2011
+@set UPDATED-MONTH November 2011
the lines are appended to the history file,
otherwise the history file is overwritten.
If @env{HISTFILE}
-is unset, or if the history file is unwritable, the history is
-not saved. After saving the history, the history file is truncated
-to contain no more than @env{$HISTFILESIZE}
-lines. If @env{HISTFILESIZE} is not set, no truncation is performed.
+is unset, or if the history file is unwritable, the history is not saved.
+After saving the history, the history file is truncated
+to contain no more than @env{$HISTFILESIZE} lines.
+If @env{HISTFILESIZE} is not set, or set to null, a non-numeric value, or
+a numeric value less than zero, the history file is not truncated.
If the @env{HISTTIMEFORMAT} is set, the time stamp information
associated with each history entry is written to the history file,
--- /dev/null
+@ignore
+This file documents the user interface to the GNU History library.
+
+Copyright (C) 1988--2011 Free Software Foundation, Inc.
+Authored by Brian Fox and Chet Ramey.
+
+Permission is granted to make and distribute verbatim copies of this manual
+provided the copyright notice and this permission notice are preserved on
+all copies.
+
+Permission is granted to process this file through Tex and print the
+results, provided the printed document carries copying permission notice
+identical to this one except for the removal of this paragraph (this
+paragraph not being relevant to the printed manual).
+
+Permission is granted to copy and distribute modified versions of this
+manual under the conditions for verbatim copying, provided also that the
+GNU Copyright statement is available to the distributee, and provided that
+the entire resulting derived work is distributed under the terms of a
+permission notice identical to this one.
+
+Permission is granted to copy and distribute translations of this manual
+into another language, under the above conditions for modified versions.
+@end ignore
+
+@node Using History Interactively
+@chapter Using History Interactively
+
+@ifclear BashFeatures
+@defcodeindex bt
+@end ifclear
+
+@ifset BashFeatures
+This chapter describes how to use the @sc{gnu} History Library
+interactively, from a user's standpoint.
+It should be considered a user's guide.
+For information on using the @sc{gnu} History Library in other programs,
+see the @sc{gnu} Readline Library Manual.
+@end ifset
+@ifclear BashFeatures
+This chapter describes how to use the @sc{gnu} History Library interactively,
+from a user's standpoint. It should be considered a user's guide. For
+information on using the @sc{gnu} History Library in your own programs,
+@pxref{Programming with GNU History}.
+@end ifclear
+
+@ifset BashFeatures
+@menu
+* Bash History Facilities:: How Bash lets you manipulate your command
+ history.
+* Bash History Builtins:: The Bash builtin commands that manipulate
+ the command history.
+* History Interaction:: What it feels like using History as a user.
+@end menu
+@end ifset
+@ifclear BashFeatures
+@menu
+* History Interaction:: What it feels like using History as a user.
+@end menu
+@end ifclear
+
+@ifset BashFeatures
+@node Bash History Facilities
+@section Bash History Facilities
+@cindex command history
+@cindex history list
+
+When the @option{-o history} option to the @code{set} builtin
+is enabled (@pxref{The Set Builtin}),
+the shell provides access to the @dfn{command history},
+the list of commands previously typed.
+The value of the @env{HISTSIZE} shell variable is used as the
+number of commands to save in a history list.
+The text of the last @env{$HISTSIZE}
+commands (default 500) is saved.
+The shell stores each command in the history list prior to
+parameter and variable expansion
+but after history expansion is performed, subject to the
+values of the shell variables
+@env{HISTIGNORE} and @env{HISTCONTROL}.
+
+When the shell starts up, the history is initialized from the
+file named by the @env{HISTFILE} variable (default @file{~/.bash_history}).
+The file named by the value of @env{HISTFILE} is truncated, if
+necessary, to contain no more than the number of lines specified by
+the value of the @env{HISTFILESIZE} variable.
+When an interactive shell exits, the last
+@env{$HISTSIZE} lines are copied from the history list to the file
+named by @env{$HISTFILE}.
+If the @code{histappend} shell option is set (@pxref{Bash Builtins}),
+the lines are appended to the history file,
+otherwise the history file is overwritten.
+If @env{HISTFILE}
+is unset, or if the history file is unwritable, the history is not saved.
+After saving the history, the history file is truncated
+to contain no more than @env{$HISTFILESIZE} lines.
+If @env{HISTFILESIZE} is not set, or set to a null or non-numeric value,
+the history file is not truncated.
+
+If the @env{HISTTIMEFORMAT} is set, the time stamp information
+associated with each history entry is written to the history 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 builtin command @code{fc} may be used to list or edit and re-execute
+a portion of the history list.
+The @code{history} 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 (@pxref{Commands For History}).
+
+The shell allows control over which commands are saved on the history
+list. The @env{HISTCONTROL} and @env{HISTIGNORE}
+variables may be set to cause the shell to save only a subset of the
+commands entered.
+The @code{cmdhist}
+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 @code{lithist}
+shell option causes the shell to save the command with embedded newlines
+instead of semicolons.
+The @code{shopt} builtin is used to set these options.
+@xref{Bash Builtins}, for a description of @code{shopt}.
+
+@node Bash History Builtins
+@section Bash History Builtins
+@cindex history builtins
+
+Bash provides two builtin commands which manipulate the
+history list and history file.
+
+@table @code
+
+@item fc
+@btindex fc
+@example
+@code{fc [-e @var{ename}] [-lnr] [@var{first}] [@var{last}]}
+@code{fc -s [@var{pat}=@var{rep}] [@var{command}]}
+@end example
+
+The first form selects a range of commands from @var{first} to
+@var{last} from the history list and displays or edits and re-executes
+them.
+Both @var{first} and
+@var{last} may be specified as a string (to locate the most recent
+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
+current command number). If @var{last} is not specified it is set to
+@var{first}. If @var{first} is not specified it is set to the previous
+command for editing and @minus{}16 for listing. If the @option{-l} flag is
+given, the commands are listed on standard output. The @option{-n} flag
+suppresses the command numbers when listing. The @option{-r} flag
+reverses the order of the listing. Otherwise, the editor given by
+@var{ename} is invoked on a file containing those commands. If
+@var{ename} is not given, the value of the following variable expansion
+is used: @code{$@{FCEDIT:-$@{EDITOR:-vi@}@}}. This says to use the
+value of the @env{FCEDIT} variable if set, or the value of the
+@env{EDITOR} variable if that is set, or @code{vi} if neither is set.
+When editing is complete, the edited commands are echoed and executed.
+
+In the second form, @var{command} is re-executed after each instance
+of @var{pat} in the selected command is replaced by @var{rep}.
+@var{command} is intepreted the same as @var{first} above.
+
+A useful alias to use with the @code{fc} command is @code{r='fc -s'}, so
+that typing @samp{r cc} runs the last command beginning with @code{cc}
+and typing @samp{r} re-executes the last command (@pxref{Aliases}).
+
+@item history
+@btindex history
+@example
+history [@var{n}]
+history -c
+history -d @var{offset}
+history [-anrw] [@var{filename}]
+history -ps @var{arg}
+@end example
+
+With no options, display the history list with line numbers.
+Lines prefixed with a @samp{*} have been modified.
+An argument of @var{n} lists only the last @var{n} lines.
+If the shell variable @env{HISTTIMEFORMAT} is set and not null,
+it is used as a format string for @var{strftime} to display
+the time stamp associated with each displayed history entry.
+No intervening blank is printed between the formatted time stamp
+and the history line.
+
+Options, if supplied, have the following meanings:
+
+@table @code
+@item -c
+Clear the history list. This may be combined
+with the other options to replace the history list completely.
+
+@item -d @var{offset}
+Delete the history entry at position @var{offset}.
+@var{offset} should be specified as it appears when the history is
+displayed.
+
+@item -a
+Append the new
+history lines (history lines entered since the beginning of the
+current Bash session) to the history file.
+
+@item -n
+Append the history lines not already read from the history file
+to the current history list. These are lines appended to the history
+file since the beginning of the current Bash session.
+
+@item -r
+Read the history file and append its contents to
+the history list.
+
+@item -w
+Write out the current history list to the history file.
+
+@item -p
+Perform history substitution on the @var{arg}s and display the result
+on the standard output, without storing the results in the history list.
+
+@item -s
+The @var{arg}s are added to the end of
+the history list as a single entry.
+
+@end table
+
+When any of the @option{-w}, @option{-r}, @option{-a}, or @option{-n} options is
+used, if @var{filename}
+is given, then it is used as the history file. If not, then
+the value of the @env{HISTFILE} variable is used.
+
+@end table
+@end ifset
+
+@node History Interaction
+@section History Expansion
+@cindex history expansion
+
+The History library provides a history expansion feature that is similar
+to the history expansion provided by @code{csh}. This section
+describes the syntax used to manipulate the history information.
+
+History expansions introduce words from the history list into
+the input 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 takes place in two parts. The first is to determine
+which line from the history list should be used during substitution.
+The second is to select portions of that line for inclusion into the
+current one. The line selected from the history is called the
+@dfn{event}, and the portions of that line that are acted upon are
+called @dfn{words}. Various @dfn{modifiers} are available to manipulate
+the selected words. The line is broken into words in the same fashion
+that Bash does, so that several words
+surrounded by quotes are considered one word.
+History expansions are introduced by the appearance of the
+history expansion character, which is @samp{!} by default.
+@ifset BashFeatures
+Only @samp{\} and @samp{'} may be used to escape the history expansion
+character.
+@end ifset
+
+@ifset BashFeatures
+Several shell options settable with the @code{shopt}
+builtin (@pxref{Bash Builtins}) may be used to tailor
+the behavior of history expansion. If the
+@code{histverify} shell option is enabled, and Readline
+is being used, history substitutions are not immediately passed to
+the shell parser.
+Instead, the expanded line is reloaded into the Readline
+editing buffer for further modification.
+If Readline is being used, and the @code{histreedit}
+shell option is enabled, a failed history expansion will be
+reloaded into the Readline editing buffer for correction.
+The @option{-p} option to the @code{history} builtin command
+may be used to see what a history expansion will do before using it.
+The @option{-s} option to the @code{history} builtin may be used to
+add commands to the end of the history list without actually executing
+them, so that they are available for subsequent recall.
+This is most useful in conjunction with Readline.
+
+The shell allows control of the various characters used by the
+history expansion mechanism with the @code{histchars} variable,
+as explained above (@pxref{Bash Variables}). The shell uses
+the history comment character to mark history timestamps when
+writing the history file.
+@end ifset
+
+@menu
+* Event Designators:: How to specify which history line to use.
+* Word Designators:: Specifying which words are of interest.
+* Modifiers:: Modifying the results of substitution.
+@end menu
+
+@node Event Designators
+@subsection Event Designators
+@cindex event designators
+
+An event designator is a reference to a command line entry in the
+history list.
+Unless the reference is absolute, events are relative to the current
+position in the history list.
+@cindex history events
+
+@table @asis
+
+@item @code{!}
+@ifset BashFeatures
+Start a history substitution, except when followed by a space, tab,
+the end of the line, @samp{=} or @samp{(} (when the
+@code{extglob} shell option is enabled using the @code{shopt} builtin).
+@end ifset
+@ifclear BashFeatures
+Start a history substitution, except when followed by a space, tab,
+the end of the line, or @samp{=}.
+@end ifclear
+
+@item @code{!@var{n}}
+Refer to command line @var{n}.
+
+@item @code{!-@var{n}}
+Refer to the command @var{n} lines back.
+
+@item @code{!!}
+Refer to the previous command. This is a synonym for @samp{!-1}.
+
+@item @code{!@var{string}}
+Refer to the most recent command
+preceding the current position in the history list
+starting with @var{string}.
+
+@item @code{!?@var{string}[?]}
+Refer to the most recent command
+preceding the current position in the history list
+containing @var{string}.
+The trailing
+@samp{?} may be omitted if the @var{string} is followed immediately by
+a newline.
+
+@item @code{^@var{string1}^@var{string2}^}
+Quick Substitution. Repeat the last command, replacing @var{string1}
+with @var{string2}. Equivalent to
+@code{!!:s/@var{string1}/@var{string2}/}.
+
+@item @code{!#}
+The entire command line typed so far.
+
+@end table
+
+@node Word Designators
+@subsection Word Designators
+
+Word designators are used to select desired words from the event.
+A @samp{:} separates the event specification from the word designator. It
+may be omitted if the word designator begins with a @samp{^}, @samp{$},
+@samp{*}, @samp{-}, or @samp{%}. Words are numbered from the beginning
+of the line, with the first word being denoted by 0 (zero). Words are
+inserted into the current line separated by single spaces.
+
+@need 0.75
+For example,
+
+@table @code
+@item !!
+designates the preceding command. When you type this, the preceding
+command is repeated in toto.
+
+@item !!:$
+designates the last argument of the preceding command. This may be
+shortened to @code{!$}.
+
+@item !fi:2
+designates the second argument of the most recent command starting with
+the letters @code{fi}.
+@end table
+
+@need 0.75
+Here are the word designators:
+
+@table @code
+
+@item 0 (zero)
+The @code{0}th word. For many applications, this is the command word.
+
+@item @var{n}
+The @var{n}th word.
+
+@item ^
+The first argument; that is, word 1.
+
+@item $
+The last argument.
+
+@item %
+The word matched by the most recent @samp{?@var{string}?} search.
+
+@item @var{x}-@var{y}
+A range of words; @samp{-@var{y}} abbreviates @samp{0-@var{y}}.
+
+@item *
+All of the words, except the @code{0}th. This is a synonym for @samp{1-$}.
+It is not an error to use @samp{*} if there is just one word in the event;
+the empty string is returned in that case.
+
+@item @var{x}*
+Abbreviates @samp{@var{x}-$}
+
+@item @var{x}-
+Abbreviates @samp{@var{x}-$} like @samp{@var{x}*}, but omits the last word.
+
+@end table
+
+If a word designator is supplied without an event specification, the
+previous command is used as the event.
+
+@node Modifiers
+@subsection Modifiers
+
+After the optional word designator, you can add a sequence of one or more
+of the following modifiers, each preceded by a @samp{:}.
+
+@table @code
+
+@item h
+Remove a trailing pathname component, leaving only the head.
+
+@item t
+Remove all leading pathname components, leaving the tail.
+
+@item r
+Remove a trailing suffix of the form @samp{.@var{suffix}}, leaving
+the basename.
+
+@item e
+Remove all but the trailing suffix.
+
+@item p
+Print the new command but do not execute it.
+
+@ifset BashFeatures
+@item q
+Quote the substituted words, escaping further substitutions.
+
+@item x
+Quote the substituted words as with @samp{q},
+but break into words at spaces, tabs, and newlines.
+@end ifset
+
+@item s/@var{old}/@var{new}/
+Substitute @var{new} for the first occurrence of @var{old} in the
+event line. Any delimiter may be used in place of @samp{/}.
+The delimiter may be quoted in @var{old} and @var{new}
+with a single backslash. If @samp{&} appears in @var{new},
+it is replaced by @var{old}. A single backslash will quote
+the @samp{&}. The final delimiter is optional if it is the last
+character on the input line.
+
+@item &
+Repeat the previous substitution.
+
+@item g
+@itemx a
+Cause changes to be applied over the entire event line. Used in
+conjunction with @samp{s}, as in @code{gs/@var{old}/@var{new}/},
+or with @samp{&}.
+
+@item G
+Apply the following @samp{s} modifier once to each word in the event.
+
+@end table
-BUILD_DIR=/usr/local/build/chet/bash/bash-current
+BUILD_DIR=/usr/local/build/bash/bash-current
THIS_SH=$BUILD_DIR/bash
PATH=$PATH:$BUILD_DIR
version.agent bowl
foobar] foo foo[bar]
bleh bbb bleh
+ab]
+bar
1
1
1
echo ${!array2[@]}
echo ${array2[@]}
+
+declare -A foo
+foo=( ['ab]']=bar )
+
+echo ${!foo[@]}
+echo ${foo[@]}
--- /dev/null
+VAR='[[:alpha:]]'
+
+[[ $VAR =~ '[[:alpha:]]' ]] && echo match 1
+
+[[ a =~ '[[:alpha:]]' ]] || echo match 2
+
+[[ a =~ [[:alpha:]] ]] && echo match 3
+
+[[ a =~ $VAR ]] && echo match 4
+
+[[ a =~ "$VAR" ]] || echo match 5
+
+line=aab
+[[ $line =~ [[:space:]]*(a)?b ]] && echo match 6
+
+V="alphabet"
+[[ $V == alphabet ]] && echo yes 1
+[[ $V == "alphabet" ]] && echo yes 2
+[[ $V == 'alphabet' ]] && echo yes 3
+[[ $V =~ alphabet ]] && echo yes 4
+[[ $V =~ "alphabet" ]] && echo yes 5
+[[ $V =~ 'alphabet' ]] && echo yes 6
+
+DOG="Dog name - 01 - Wiggles"
+REPAT='([[:alpha:][:blank:]]*)- ([[:digit:]]*) - (.*)$'
+if [[ $DOG =~ ([[:alpha:][:blank:]]*)-\ ([[:digit:]]*)\ -\ (.*)$ ]]
+then
+ echo Dog ${BASH_REMATCH[2]} is ${BASH_REMATCH[3]}
+fi
+if [[ $DOG =~ $REPAT ]]
+then
+ echo Dog ${BASH_REMATCH[2]} is ${BASH_REMATCH[3]}
+fi
+
+[[ $REPAT =~ "$REPAT" ]] && echo rematch 1
+
+v="one two buckle my shoe"
+[[ ${v} =~ "one two" ]] && echo matches 7
+
+[[ ${v} =~ (one two) ]] && echo matches 8
+
+[[ ${v} =~ one\ two ]] && echo matches 9
+
+unset pattern string
+pattern="xxx.yyy"
+string=xxxAyyy
+
+[[ $string =~ $pattern ]] && echo unquoted matches
+[[ $string =~ "$pattern" ]] && echo quoted matches
+
+# problems in pre-patched bash-4.2
+[[ "hello\ 1world" =~ llo\ 1 ]] && echo match control-a 1
+[[ "hello\ 1world" =~ \ 1world ]] && echo match control-a 2
+[[ "hello\ 1world" =~ \ 1world$ ]] && echo match control-a 3
+[[ "hello\ 1world" =~ \ 1 ]] && echo match control-a 4
+[[ "hello\ 1world" =~ o\ 1world$ ]] && echo match control-a 5
--- /dev/null
+[[ "\\" =~ ["."] ]] && echo bad 1
+
+[[ "\\" =~ "[.]" ]] && echo bad 2
+
+[[ "\\" =~ [\. ]] && echo bad 3
+
+[[ "\\" =~ [\.] ]] && echo bad 4
+
+[[ "\\" =~ [\\] ]] || echo bad 5
+
+[[ dog =~ [[=d=]].. ]] && echo ok 1
+[[ d.. =~ [[=d=]]\.\. ]] && echo ok 2
+[[ dog =~ ['[=d=]'].. ]] && echo ok 3 # dubious
+
+[[ dog =~ [[=d=]].[[=G=][=g=]] ]] && echo ok 4
+[[ dog =~ [[=d=]].[\[=G=][=g=]] ]] && echo ok 4a
+
+[[ dog =~ "d.." ]] || echo ok 5
+
+[[ dog =~ [[.d.][.D.]]o. ]] && echo ok 6
+
+[[ dog =~ ([[.d.][.D.]])o(.) ]] && echo ok 7 -- ${BASH_REMATCH[1]}
+[[ dog =~ d([[.o.][.O.]])(.) ]] && echo ok 8 -- ${BASH_REMATCH[1]}
+[[ dog =~ .([[.o.][.O.]])(.) ]] && echo ok 9
+
+[[ dog =~ 'd''o''g' ]] && echo ok 10
+
+[[ ']' =~ [']'] ]] && echo ok 11
+
+[[ a =~ ['a]'] ]] || echo ok 12
matches 7
matches 8
matches 9
+unquoted matches
match control-a 1
match control-a 2
match control-a 3
match control-a 4
match control-a 5
+ok 1
+ok 2
+ok 3
+ok 4
+ok 4a
+ok 5
+ok 6
+ok 7 -- d
+ok 8 -- o
+ok 9
+ok 10
+ok 11
+ok 12
if [[ "123abc" == *?(a)bc ]]; then echo ok 42; else echo bad 42; fi
if [[ "123abc" == *?(a)bc ]]; then echo ok 43; else echo bad 43; fi
-${THIS_SH} ./cond-regexp.sub
+${THIS_SH} ./cond-regexp1.sub
+
+${THIS_SH} ./cond-regexp2.sub
set_if_not ("HISTFILE", name);
free (name);
-
-#if 0
- set_if_not ("HISTSIZE", "500");
- sv_histsize ("HISTSIZE");
-#endif
}
#endif /* HISTORY */
if (legal_number (temp, &num))
{
hmax = num;
- if (name[4] == 'S')
+ if (hmax < 0 && name[4] == 'S')
+ unstifle_history (); /* unstifle history if HISTSIZE < 0 */
+ else if (name[4] == 'S')
{
stifle_history (hmax);
hmax = where_history ();
if (history_lines_this_session > hmax)
history_lines_this_session = hmax;
}
- else
+ else if (hmax >= 0) /* truncate HISTFILE if HISTFILESIZE >= 0 */
{
history_truncate_file (get_string_value ("HISTFILE"), hmax);
if (hmax <= history_lines_in_file)
set_if_not ("HISTFILE", name);
free (name);
-
-#if 0
- set_if_not ("HISTSIZE", "500");
- sv_histsize ("HISTSIZE");
-#endif
}
#endif /* HISTORY */
{
dollar_arg_stack = (WORD_LIST **)
xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10)
- * sizeof (WORD_LIST **));
+ * sizeof (WORD_LIST *));
}
dollar_arg_stack[dollar_arg_stack_index++] = list_rest_of_args ();
dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
projects / thirdparty / bash.git / commitdiff
