+++ /dev/null
-This document details the changes between this version, bash-4.1-alpha,
-and the previous version, bash-4.0-release.
-
-1. Changes to Bash
-
-a. Fixed bugs in the parser involving new parsing of the commands contained
- in command substitution when the substitution is read.
-
-b. Fixed a bug that caused the shell to dump core when performing programmable
- completion using a shell function.
-
-c. Fixed a bug in `mapfile' that caused it to invoke callbacks at the wrong
- time.
-
-d. Fixed a bug that caused the shell to dump core when listing jobs in the
- `exit' builtin.
-
-e. Fixed several bugs encountered when reading subscripts in associative
- array assignments and expansions.
-
-f. Fixed a bug that under some circumstances caused an associative array to
- be converted to an indexed array.
-
-g. Fixed a bug that caused syntax errors and SIGINT interrupts to not set
- $? to a value > 128.
-
-h. Fixed a bug that caused the shell to remove FIFOs associated with process
- substitution inside shell functions.
-
-i. Fixed a bug that caused terminal attributes to not be reset when the
- `read' builtin timed out.
-
-j. Fixed a bug in brace expansion that caused unwanted zero padding of the
- expanded terms.
-
-k. Fixed a bug that prevented the |& construct from working as intended when
- used with a simple command with additional redirections.
-
-l. Fixed a bug with the case statment ;& terminator that caused the shell to
- dereference a NULL pointer.
-
-m. Fixed a bug that caused assignment statements or redirections preceding
- a simple command name to inhibit alias expansion.
-
-n. Fixed the behavior of `set -u' to conform to the latest Posix interpretation:
- every expansion of an unset variable except $@ and $* will cause the
- shell to exit.
-
-o. Fixed a bug that caused double-quoted expansions of $* inside word
- expansions like ${x#$*} to not expand properly when $IFS is empty.
-
-p. Fixed a bug that caused traps to set $LINENO to the wrong value when they
- execute.
-
-q. Fixed a bug that caused off-by-one errors when computing history lines in
- the `fc' builtin.
-
-r. Fixed a bug that caused some terminating signals to not exit the shell
- quickly enough, forcing the kernel to send the signal (e.g., SIGSEGV)
- multiple times.
-
-s. Fixed a bug that caused the shell to attempt to add empty lines to the
- history list when reading here documents.
-
-t. Made some internal changes that dramatically speeds up sequential indexed
- array access.
-
-u. Fixed a bug that caused the shell to write past the end of a string when
- completing a double-quoted string ending in a backslash.
-
-v. Fixed a bug that caused the shell to replace too many characters when a
- pattern match was null in a ${foo//bar} expansion.
-
-w. Fixed bugs in the expansion of ** that caused duplicate directory names
- and the contents of the current directory to be omitted.
-
-x. Fixed a bug that caused $? to not be set correctly when referencing an
- unset variable with set -u and set -e enabled.
-
-y. Fixed a bug caused by executing an external program from the DEBUG trap
- while a pipeline was running. The effect was to disturb the pipeline
- state, occasionally causing it to hang.
-
-z. Fixed a bug that caused the ** glob expansion to dump core if it
- encountered an unsearchable directory.
-
-aa. Fixed a bug that caused `command -v' and `command -V' to not honor the
- path set by the -p option.
-
-bb. Fixed a bug that caused brace expansion to take place too soon in some
- compound array assignments.
-
-cc. Fixed a bug that caused programmable completion functions' changes to
- READLINE_POINT to not be reflected back to readline.
-
-dd. Fixed a bug that caused the shell to dump core if a trap was executed
- during a shell assignment statement.
-
-ee. Fixed an off-by-one error when computing the number of positional
- parameters for the ${@:0:n} expansion.
-
-ff. Fixed a problem with setting COMP_CWORD for programmable completion
- functions that could leave it set to -1.
-
-gg. Fixed a bug that caused the ERR trap to be triggered in some cases where
- `set -e' would not have caused the shell to exit.
-
-hh. Fixed a bug that caused changes made by `compopt' to not persist past the
- completion function in which compopt was executed.
-
-ii. Fixed a bug that caused the list of hostname completions to not be cleared
- when HOSTNAME was unset.
-
-jj. Fixed a bug that caused variable expansion in here documents to look in
- any temporary environment.
-
-kk. Bash and readline can now convert file names between precomposed and
- decomposed Unicode on Mac OS X ("keyboard" and file system forms,
- respectively). This affects filename completion and globbing.
-
-2. Changes to Readline
-
-a. The SIGWINCH signal handler now avoids calling the redisplay code if
- one arrives while in the middle of redisplay.
-
-b. Changes to the timeout code to make sure that timeout values greater
- than one second are handled better.
-
-c. Fixed a bug in the redisplay code that was triggered by a prompt
- containing invisible characters exactly the width of the screen.
-
-d. Fixed a bug in the redisplay code encountered when running in horizontal
- scroll mode.
-
-e. Fixed a bug that prevented menu completion from properly completing
- filenames.
-
-f. Fixed a redisplay bug caused by a multibyte character causing a line to
- wrap.
-
-g. Fixed a bug that caused key sequences of two characters to not be
- recognized when a longer sequence identical in the first two characters
- was bound.
-
-3. New Features in Bash
-
-a. Here-documents within $(...) command substitutions may once more be
- delimited by the closing right paren, instead of requiring a newline.
-
-b. Bash's file status checks (executable, readable, etc.) now take file
- system ACLs into account on file systems that support them.
-
-c. Bash now passes environment variables with names that are not valid
- shell variable names through into the environment passed to child
- processes.
-
-d. The `execute-unix-command' readline function now attempts to clear and
- reuse the current line rather than move to a new one after the command
- executes.
-
-e. `printf -v' can now assign values to array indices.
-
-f. New `complete -E' and `compopt -E' options that work on the "empty"
- completion: completion attempted on an empty command line.
-
-g. New complete/compgen/compopt -D option to define a `default' completion:
- a completion to be invoked on command for which no completion has been
- defined. If this function returns 124, programmable completion is
- attempted again, allowing a user to dynamically build a set of completions
- as completion is attempted by having the default completion function
- install individual completion functions each time it is invoked.
-
-h. When displaying associative arrays, subscripts are now quoted.
-
-i. Changes to dabbrev-expand to make it more `emacs-like': no space appended
- after matches, completions are not sorted, and most recent history entries
- are presented first.
-
-j. The [[ and (( commands are now subject to the setting of `set -e' and the
- ERR trap.
-
-k. The source/. builtin now removes NUL bytes from the file before attempting
- to parse commands.
-
-l. There is a new configuration option (in config-top.h) that forces bash to
- forward all history entries to syslog.
-
-m. A new variable $BASHOPTS to export shell options settable using `shopt' to
- child processes.
-
-n. Users may now set a configure-time option to force extglob to be on by
- default.
-
-o. A new variable $BASH_XTRACEFD, set to an integer file descriptor where
- the shell displays xtrace output.
-
-4. New Features in Readline
-
-a. New bindable function: menu-complete-backward.
-
-b. In the vi insertion keymap, C-n is now bound to menu-complete by default,
- and C-p to menu-complete-backward.
-
-c. When in vi command mode, repeatedly hitting ESC now does nothing, even
- when ESC introduces a bound key sequence. This is closer to how
- historical vi behaves.
-
-d. New bindable function: skip-csi-sequence. Can be used as a default to
- consume key sequences generated by keys like Home and End without having
- to bind all keys.
-
-e. New application-settable function: rl_filename_rewrite_hook. Can be used
- to rewite or modify filenames read from the file system before they are
- compared to the word to be complet
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-release,
-and the previous version, bash-4.0-rc1.
-
-1. Changes to Bash
-
-a. Changed the message printed when setlocale(3) fails to only include the
- strerror error text if the call changes errno.
-
-b. Changed trap command execution to reset the line number before running a
- trap (except DEBUG and RETURN traps).
-
-c. Fixed behavior of case-modifiying word expansions to not work on
- individual words within a variable's value.
-
-d. Fixed a bug that caused mapfile to not be interruptible when run in an
- interactive shell.
-
-e. Fixed a bug that caused mapfile to not run callbacks for the first line
- read.
-
-f. Fixed a bug that caused mapfile to not honor EOF typed in an interactive
- shell.
-
-g. Fixed the coprocess reaping code to not run straight from a signal handler.
-
-h. Fixed a bug that caused printf -b to ignore the first % conversion specifier
- in the format string on 64-bit systems.
-
-i. Fixed a bug that caused incorrect word splitting when `:', `=', or `~'
- appeared in $IFS.
-
-j. Fixed a bug that caused data corruption in the programmable completion code
- when a shell function called from a completion aborted execution.
-
-k. Fixed a bug that caused the CPU usage reported by the `time' builtin to be
- capped at 100%.
-
-l. Changed behavior of shell when -e option is in effect to reflect consensus
- of Posix shell standardization working group.
-
-m. Fixed a bug introduced in bash-4.0-alpha that caused redirections to not
- be displayed by `type' or `declare' when appearing in functions under
- certain circumstances.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused !(...) extended glob patterns to inhibit later
- history expansion.
-
-b. Reworked the signal handling to avoid calling disallowed functions from a
- signal handler.
-
-3. New Features in Bash
-
-a. `readarray' is now a synonym for `mapfile'.
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-rc1,
-and the previous version, bash-4.0-beta2.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused parsing errors when a $()-style command
- substitution was follwed immediately by a quoted newline.
-
-b. Fixed a bug that caused extended shell globbing patterns beginning with
- `*(' to not work when used with pattern substitution word expansions.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-beta2,
-and the previous version, bash-4.0-beta.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused failed word expansions to set $? but not
- PIPESTATUS.
-
-b. Changed filename completion to quote the tilde in a filename with a
- leading tilde that exists in the current directory.
-
-c. Fixed a bug that caused a file descriptor leak when performing
- redirections attached to a compound command.
-
-d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if
- the -u option was enabled and there were no posititional parameters.
-
-e. Fixed a bug that resulted in bash not terminating immediately if a
- terminating signal was received while performing output.
-
-f. Fixed a bug that caused the shell to crash after creating 256 process
- substitutions during word completion.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused redisplay errors when using prompts with invisible
- characters and numeric arguments to a command in a multibyte locale.
-
-b. Fixed a bug that caused redisplay errors when using prompts with invisible
- characters spanning more than two physical screen lines.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-beta,
-and the previous version, bash-4.0-alpha.
-
-1. Changes to Bash
-
-a. Fixed a typo that caused a variable to be used before initialization
- while parsing Posix-style command substitutions.
-
-b. Fixed a bug that caused stray ^? when the expansion of a parameter used
- as part of a pattern removal expansion is empty, but part of a non-
- empty string.
-
-c. Fixed a bug that could cause strings not converted to numbers by strtol
- to be treated as if the conversion had been successful.
-
-d. The `return' builtin now accepts no options and requires a `--' before
- a negative return value, as Posix requires.
-
-e. Fixed a bug that caused local variables to be created with the empty
- string for a value rather than no value.
-
-f. Changed behavior so the shell now acts as if it received an interrupt
- when a pipeline is killed by SIGINT while executing a list.
-
-g. Fixed a bug that caused `declare var' and `typeset var' to initialize
- `var' to the empty string.
-
-h. Changed `bind' builtin to print a warning but proceed if invoked when
- line editing is not active.
-
-i. Fixed a bug that caused the shell to exit when the `errexit' option is
- set and a command in a pipeline returns a non-zero exit status.
-
-j. Fixed a bug that caused the shell to not run the exit trap in a command
- run with `bash -c' under some circumstances.
-
-k. Fixed a bug that caused parser errors to occasionally not set $? when
- running commands with `eval'.
-
-l. Fixed a bug that caused stray control characters when evaluating compound
- array assignments containing $'\x7f' escapes.
-
-m. Fixed a bug that caused redirections involving file descriptor 10 as the
- target to behave incorrectly.
-
-n. Fixed a bug that could cause memory to be freed multiple times when
- assigning to COMP_WORDBREAKS.
-
-o. Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS
- was unset.
-
-2. Changes to Readline
-
-3. New Features in Bash
-
-a. A value of 0 for the -t option to `read' now returns success if there is
- input available to be read from the specified file descriptor.
-
-b. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged
- mode.
-
-c. New bindable readline functions shell-forward-word and shell-backward-word,
- which move forward and backward words delimited by shell metacharacters
- and honor shell quoting.
-
-d. New bindable readline functions shell-backward-kill-word and shell-kill-word
- which kill words backward and forward, but use the same word boundaries
- as shell-forward-word and shell-backward-word.
-
-4. New Features in Readline
-
-a. If the kernel supports it, readline displays special characters
- corresponding to a keyboard-generated signal when the signal is received.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-alpha,
-and the previous version, bash-3.2-release.
-
-1. Changes to Bash
-
-a. Fixed several bugs in old-style `` command substitution parsing, including
- comment parsing and quoted string handling.
-
-b. Fixed problems parsing arguments to the [[ command's =~ regular expression
- matching operator: metacharacter and whitespace parsing.
-
-c. Fixed a bug that caused the shell to inappropriately reuse high-numbered
- file descriptors it used internally.
-
-d. Fixed a bug in pattern replacement word expansions that caused a `/' as
- the first character of an expanded pattern to be mistaken for a global
- replacement specifier.
-
-e. Fixed several problems with the asprintf and snprintf replacement functions
- that caused hangs and crashes.
-
-f. Fixed a bug in the calculation of the current and previous job that caused
- it to refer to incorrect jobs.
-
-g. Fixed a bug in the check for the validity of a hashed command pathname that
- caused unnecessary hash table deletions and additions.
-
-h. Fixed a bug that caused child processes to inherit the wrong value for $!.
-
-i. Fixed a bug that caused `.' to fail to read and execute commands from non-
- regular files such as devices or named pipes.
-
-j. Fixed a bug in printf formatting for the %x and %X expansions that occurred
- on some systems.
-
-k. Fixed a bug that caused the shell to crash when creating temporary files if
- $TMPDIR named a non-writable directory.
-
-l. Fixed a bug that caused the shell to ignore $TMPDIR when creating temporary
- files under some circumstances.
-
-m. Fixed a bug that caused named pipes created by process substitution to not
- be cleaned up.
-
-n. Fixed a bug that caused HISTTIMEFORMAT to not be honored when it appeared
- in the initial shell environment.
-
-o. Fixed several bugs in the expansion of $* and $@ (quoted and unquoted)
- when IFS is null or contains non-whitespace characters; the same changes
- apply to arrays subscripted with * or @.
-
-p. Fixed several problems with pattern substitution expansions on the
- positional parameters and arrays subscripted with * or @ that occurred
- when $IFS was set to the empty string.
-
-q. Made a change to the default locale initialization code that should
- result in better behavior from the locale-aware library functions.
-
-r. Fixed a bug that caused compacting the jobs list to drop jobs.
-
-s. Fixed a bug that caused jumps back to the top-level processing loop from
- a builtin command to leave the shell in an inconsistent state.
-
-t. Fixed a bug that caused characters that would be escaped internally to be
- doubled when escaped with a backslash.
-
-u. Fixed the initialization of mailboxes to not cause maildirs to be read
- (and stat(2) called for every message file) at shell startup.
-
-v. Fixed a bug that caused the shell to not display $PS2 when the read builtin
- reads a line continued with a backslash.
-
-w. Fixed a bug that caused errors in word splitting when $IFS contained
- characters used for internal quoting.
-
-x. Fixed bugs that caused problems with output from shell builtins not being
- completely displayed on some systems.
-
-y. Fixed a bug that caused output to be lost when a redirection is acting on
- the shell's output file descriptor.
-
-z. Fixed bugs caused by shell builtins not checking for all write errors.
-
-aa. Fixed a problem that caused the shell to dump core if expansions on the
- pattern passed to the pattern removal word expansions resulted in expansion
- errors.
-
-bb. Fixed a bug that caused bash to loop infinitely after creating and
- waiting for 4096 jobs.
-
-cc. Fixed a bug that caused bash to lose the status of a background job under
- certain circumstances.
-
-dd. Fixed a bug that caused bash to not look in the temporary environment
- when performing variable lookup under certain circumstances.
-
-ee. Fixed a bug that caused bash to close file descriptors greater than 10
- when they were used in redirections.
-
-ff. Fixed a problem that caused the shell to attempt to read from the standard
- input when called as `bash -i script'.
-
-gg. Fixed a memory leak and variable initialization problems when the -v option
- was supplied to `printf' that could cause incorrect results.
-
-hh. Fixed a bug that caused the `read' builtin to count bytes when the -n option
- was supplied, rather than (possibly multibyte) characters.
-
-ii. Fixed a bug when displaying a function due to not converting the function
- to an external form.
-
-jj. Changed job control initialization to ensure that the shell has a tty
- as its controlling terminal before enabling job control.
-
-kk. Fixed a bug with the `test' builtin that caused it to misinterpret
- arguments beginning with `-' but containing more than one character.
-
-ll. Fixed bug that could cause the shell to dump core in certain cases where
- a command sets the SIGINT disposition to the default.
-
-mm. Fixed a bug in the pattern replacement (affecting both word expansion
- and the `fc' builtin) that occurred when the pattern and replacement
- strings were empty.
-
-nn. Fixed a bug that caused an arithmetic evaluation error to disable all
- further evaluation.
-
-oo. Fixed a bug in pathname expansion that caused it to interpret backslashes
- in the pathname as quoting characters.
-
-pp. Fixed a bug in the replacement getcwd() implementation that could cause
- memory to be overwritten.
-
-qq. When in Posix mode, the `ulimit' builtin now uses a block size of 512 for
- the `-c' and `-f' options.
-
-rr. Brace expansion now allows process substitutions to pass through unchanged.
-
-ss. Fixed a problem in the command name completion code to avoid quoting
- escaped special characters twice when the command name begins with a tilde.
-
-tt. Fixed a problem in the printf builtin that resulted in single-byte
- output for the "'" escape, even when using multibyte characters.
-
-uu. Fixed a bug that caused the failure exit status to be lost when redirections
- attached to a compound command failed.
-
-vv. Fixed a bug that caused the internal random number generator to not be
- re-seeded correctly when creating a subshell.
-
-ww. Fixed a bug that could cause the bash replacement getcwd to overwrite
- memory.
-
-xx. Fixed a bug that caused the shell to not receive SIGINT if it was sent
- while the shell was waiting for a command substitution to terminate, and
- make sure the exit status is correct when it does.
-
-yy. Fixed a bug that resulted in the second and subsequent children spawned
- by a shell begun to run a command substitution being placed into the
- wrong process group.
-
-zz. Fixed a bug that caused the results of successful tilde expansion to be
- subject to pathname expansion and word splitting.
-
-aaa. Fixed a bug that could cause the shell to hang if it encountered an
- error that caused it to jump back to the top processing loop during a
- command substitution or `eval' command.
-
-bbb. Fixed a bug that caused the `read' builtin to use the tty's attributes
- instead of those of the file descriptor passed with the -u option when
- processing the -n and -d options.
-
-ccc. Fixed a bug that caused incorrect expansion of ${array[@]:foo} if the
- first character of $IFS was not whitespace.
-
-ddd. Fixed a bug that occurred when scanning for the ending delimiter of a
- ${parameter/pat/sub} expansion.
-
-eee. Fixed a bug that caused the shell to inappropriately expand command
- substitutions in words when expanding directory names for completion.
-
-fff. Fixed a bug that caused the `fc' builtin to look too far back in the
- history list under certain circumstances.
-
-ggg. Fixed a bug that caused a shell running in Posix mode to search $PWD for
- a file specified as an argument to source/. when the file was not found
- in $PATH.
-
-hhh. Fixed a bug that caused the shell to modify the case of a command word
- found via command completion when the shell was performing case-
- insensitive completion.
-
-iii. Fixed a bug that caused the shell to search $PATH for an argument to
- source/. even when it contained a `/'.
-
-jjj. Fixed a bug that caused brace expansion to misorder expansions when the
- locale did not have a collating order like aAbBcC...zZ.
-
-kkk. Fixed a bug that did not allow `set +o history' to have any effect when
- run in a startup file or from a sourced file.
-
-lll. Fixed a bug with the precedence of the ?: conditional arithmetic operator.
-
-mmm. Fixed a bug that caused side effects of temporary variable assignments
- to persist in the shell environment.
-
-nnn. Fixed a bug that caused the terminal to be left in non-canonical mode
- when using editing commands that invoke the an editor on the current
- command line.
-
-ooo. Fixed a bug that caused globbing characters and characters in $IFS to not
- be quoted appropriately when displaying assignment statements.
-
-ppp. Fixed a bug that caused the `-e' option to be inherited when sourcing a
- file or evaluating a command with `eval' even if the return value of the
- command was supposed to be ignored.
-
-qqq. Fixed a bug that caused the shell to attempt to created variables with
- invalid names if such names appeared in the initial environment.
-
-rrr. Fixed a bug with quote removal in strings where the final character is a
- backslash.
-
-sss. Fixed a bug that caused the effects of special variables to persist even
- when the variables were unset as part of the shell reinitializing itself
- to execute a shell script.
-
-ttt. Fixed a bug that caused the history to not be saved after `history -c' or
- `history -d' was executed until a sufficient number of commands had been
- saved to the history.
-
-uuu. Bash now parses command substitutions according to Posix rules: parsing
- the command contained in $() to find the closing delimiter.
-
-vvv. Fixed a bug that caused traps on SIGCHLD set in a SIGCHLD handler to
- not persist.
-
-www. Fixed a bug that didn't allow SIGCHLD to interrupt the `wait' builtin
- as Posix specifies.
-
-xxx. Invalid numeric arguments to shell builtins no longer cause the shell to
- short-circuit any executing compound command.
-
-yyy. Fixed a bug that caused the exit status to be lost when `break' was
- used to short-circuit a loop's execution.
-
-zzz. Fixed a bug that caused stray ^? characters to be left in expansions of
- "${array[*]}".
-
-aaaa. Bash now prints better error messages for here documents terminated by
- EOF and for identifying the incorrect token in an invalid arithmetic
- expression.
-
-bbbb. Fixed a bug in the variable length word expansion that caused it to
- incorrectly calculate the number of multibyte characters.
-
-cccc. Fixed a race condition that could result in the top-level shell setting
- the terminal's process group to an incorrect value if the process
- group was changed by a child of a child of the shell.
-
-dddd. Fixed a bug that caused here documents belonging to commands within a
- compound command to be displayed in a syntactially-incorrect form, which
- prevented them from being re-read as input.
-
-eeee. The shell displays more warnings about failures to set the locale.
-
-ffff. Fixed a bug that caused the body of a here-document to not be saved to
- the history list.
-
-gggg. Fixed a bug that caused configure to incorrectly conclude that FreeBSD
- had /dev/fd available, resulting in problems with process substitution.
-
-2. Changes to Readline
-
-a. Fixed a number of redisplay errors in environments supporting multibyte
- characters.
-
-b. Fixed bugs in vi command mode that caused motion commands to inappropriately
- set the mark.
-
-c. When using the arrow keys in vi insertion mode, readline allows movement
- beyond the current end of the line (unlike command mode).
-
-d. Fixed bugs that caused readline to loop when the terminal has been taken
- away and reads return -1/EIO.
-
-e. Fixed bugs in redisplay occurring when displaying prompts containing
- invisible characters.
-
-f. Fixed a bug that caused the completion append character to not be reset to
- the default after an application-specified completion function changed it.
-
-g. Fixed a problem that caused incorrect positioning of the cursor while in
- emacs editing mode when moving forward at the end of a line while using
- a locale supporting multibyte characters.
-
-h. Fixed an off-by-one error that caused readline to drop every 511th
- character of buffered input.
-
-i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up.
-
-j. Fixed redisplay bugs caused by multiline prompts with invisible characters
- or no characters following the final newline.
-
-k. Fixed redisplay bug caused by prompts consisting solely of invisible
- characters.
-
-l. Fixed a bug in the code that buffers characters received very quickly in
- succession which caused characters to be dropped.
-
-m. Fixed a bug that caused readline to reference uninitialized data structures
- if it received a SIGWINCH before completing initialzation.
-
-n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly
- and therefore unrepeatable.
-
-o. Fixed a bug that caused readline to disable echoing when it was being used
- with an output file descriptor that was not a terminal.
-
-p. Readline now blocks SIGINT while manipulating internal data structures
- during redisplay.
-
-q. Fixed a bug in redisplay that caused readline to segfault when pasting a
- very long line (over 130,000 characters).
-
-r. Fixed bugs in redisplay when using prompts with no visible printing
- characters.
-
-3. New Features in Bash
-
-a. When using substring expansion on the positional parameters, a starting
- index of 0 now causes $0 to be prefixed to the list.
-
-b. The `help' builtin now prints its columns with entries sorted vertically
- rather than horizontally.
-
-c. There is a new variable, $BASHPID, which always returns the process id of
- the current shell.
-
-d. There is a new `autocd' option that, when enabled, causes bash to attempt
- to `cd' to a directory name that is supplied as the first word of a
- simple command.
-
-e. There is a new `checkjobs' option that causes the shell to check for and
- report any running or stopped jobs at exit.
-
-f. The programmable completion code exports a new COMP_TYPE variable, set to
- a character describing the type of completion being attempted.
-
-g. The programmable completion code exports a new COMP_KEY variable, set to
- the character that caused the completion to be invoked (e.g., TAB).
-
-h. If creation of a child process fails due to insufficient resources, bash
- will try again several times before reporting failure.
-
-i. The programmable completion code now uses the same set of characters as
- readline when breaking the command line into a list of words.
-
-j. The block multiplier for the ulimit -c and -f options is now 512 when in
- Posix mode, as Posix specifies.
-
-k. Changed the behavior of the read builtin to save any partial input received
- in the specified variable when the read builtin times out. This also
- results in variables specified as arguments to read to be set to the empty
- string when there is no input available. When the read builtin times out,
- it returns an exit status greater than 128.
-
-l. The shell now has the notion of a `compatibility level', controlled by
- new variables settable by `shopt'. Setting this variable currently
- restores the bash-3.1 behavior when processing quoted strings on the rhs
- of the `=~' operator to the `[[' command.
-
-m. The `ulimit' builtin now has new -b (socket buffer size) and -T (number
- of threads) options.
-
-n. The -p option to `declare' now displays all variable values and attributes
- (or function values and attributes if used with -f).
-
-o. There is a new `compopt' builtin that allows completion functions to modify
- completion options for existing completions or the completion currently
- being executed.
-
-p. The `read' builtin has a new -i option which inserts text into the reply
- buffer when using readline.
-
-q. A new `-E' option to the complete builtin allows control of the default
- behavior for completion on an empty line.
-
-r. There is now limited support for completing command name words containing
- globbing characters.
-
-s. Changed format of internal help documentation for all builtins to roughly
- follow man page format.
-
-t. The `help' builtin now has a new -d option, to display a short description,
- and a -m option, to print help information in a man page-like format.
-
-u. There is a new `mapfile' builtin to populate an array with lines from a
- given file.
-
-v. If a command is not found, the shell attempts to execute a shell function
- named `command_not_found_handle', supplying the command words as the
- function arguments.
-
-w. There is a new shell option: `globstar'. When enabled, the globbing code
- treats `**' specially -- it matches all directories (and files within
- them, when appropriate) recursively.
-
-x. There is a new shell option: `dirspell'. When enabled, the filename
- completion code performs spelling correction on directory names during
- completion.
-
-y. The `-t' option to the `read' builtin now supports fractional timeout
- values.
-
-z. Brace expansion now allows zero-padding of expanded numeric values and
- will add the proper number of zeroes to make sure all values contain the
- same number of digits.
-
-aa. There is a new bash-specific bindable readline function: `dabbrev-expand'.
- It uses menu completion on a set of words taken from the history list.
-
-bb. The command assigned to a key sequence with `bind -x' now sets two new
- variables in the environment of the executed command: READLINE_LINE_BUFFER
- and READLINE_POINT. The command can change the current readline line
- and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT,
- respectively.
-
-cc. There is a new &>> redirection operator, which appends the standard output
- and standard error to the named file.
-
-dd. The parser now understands `|&' as a synonym for `2>&1 |', which redirects
- the standard error for a command through a pipe.
-
-ee. The new `;&' case statement action list terminator causes execution to
- continue with the action associated with the next pattern in the
- statement rather than terminating the command.
-
-ff. The new `;;&' case statement action list terminator causes the shell to
- test the next set of patterns after completing execution of the current
- action, rather than terminating the command.
-
-gg. The shell understands a new variable: PROMPT_DIRTRIM. When set to an
- integer value greater than zero, prompt expansion of \w and \W will
- retain only that number of trailing pathname components and replace
- the intervening characters with `...'.
-
-hh. There are new case-modifying word expansions: uppercase (^[^]) and
- lowercase (,[,]). They can work on either the first character or
- array element, or globally. They accept an optional shell pattern
- that determines which characters to modify. There is an optionally-
- configured feature to include capitalization operators.
-
-ii. The shell provides associative array variables, with the appropriate
- support to create, delete, assign values to, and expand them.
-
-jj. The `declare' builtin now has new -l (convert value to lowercase upon
- assignment) and -u (convert value to uppercase upon assignment) options.
- There is an optionally-configurable -c option to capitalize a value at
- assignment.
-
-kk. There is a new `coproc' reserved word that specifies a coprocess: an
- asynchronous command run with two pipes connected to the creating shell.
- Coprocs can be named. The input and output file descriptors and the
- PID of the coprocess are available to the calling shell in variables
- with coproc-specific names.
-
-4. New Features in Readline
-
-a. A new variable, rl_sort_completion_matches; allows applications to inhibit
- match list sorting (but beware: some things don't work right if
- applications do this).
-
-b. A new variable, rl_completion_invoking_key; allows applications to discover
- the key that invoked rl_complete or rl_menu_complete.
-
-c. The functions rl_block_sigint and rl_release_sigint are now public and
- available to calling applications who want to protect critical sections
- (like redisplay).
-
-d. The functions rl_save_state and rl_restore_state are now public and
- available to calling applications; documented rest of readline's state
- flag values.
-
-e. A new user-settable variable, `history-size', allows setting the maximum
- number of entries in the history list.
-
-f. There is a new implementation of menu completion, with several improvements
- over the old; the most notable improvement is a better `completions
- browsing' mode.
-
-g. The menu completion code now uses the rl_menu_completion_entry_function
- variable, allowing applications to provide their own menu completion
- generators.
-
-h. There is support for replacing a prefix of a pathname with a `...' when
- displaying possible completions. This is controllable by setting the
- `completion-prefix-display-length' variable. Matches with a common prefix
- longer than this value have the common prefix replaced with `...'.
-
-i. There is a new `revert-all-at-newline' variable. If enabled, readline will
- undo all outstanding changes to all history lines when `accept-line' is
- executed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.2-release,
-and the previous version, bash-3.2-beta.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused the temporary environment passed to a command to
- affect the shell's environment under certain circumstances.
-
-b. Fixed a bug in the printf builtin that caused the %q format specifier to
- ignore empty string arguments.
-
-c. Improved multibyte character environment detection at configuration time.
-
-d. Fixed a bug in the read builtin that left spurious escape characters in the
- input after processing backslashes when assigning to an array variable.
-
-2. Changes to Readline
-
-a. Fixed a redisplay bug that occurred in multibyte-capable locales when the
- prompt was one character longer than the screen width.
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.2-beta,
-and the previous version, bash-3.2-alpha.
-
-1. Changes to Bash
-
-a. Changed the lexical analyzer to treat locale-specific blank characters as
- white space.
-
-b. Fixed a bug in command printing to avoid confusion between redirections and
- process substitution.
-
-c. Fixed problems with cross-compiling originating from inherited environment
- variables.
-
-d. Added write error reporting to printf builtin.
-
-e. Fixed a bug in the variable expansion code that could cause a core dump in
- a multi-byte locale.
-
-f. Fixed a bug that caused substring expansion of a null string to return
- incorrect results.
-
-g. BASH_COMMAND now retains its previous value while executing commands as the
- result of a trap, as the documentation states.
-
-2. Changes to Readline
-
-a. Fixed a bug with prompt redisplay in a multi-byte locale to avoid redrawing
- the prompt and input line multiple times.
-
-b. Fixed history expansion to not be confused by here-string redirection.
-
-c. Readline no longer treats read errors by converting them to newlines, as
- it does with EOF. This caused partial lines to be returned from readline().
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.2-alpha,
-and the previous version, bash-3.1-release.
-
-1. Changes to Bash
-
-a. Fixed a source bug that caused the minimal configuration to not compile.
-
-b. Fixed memory leaks in error handling for the `read' builtin.
-
-c. Changed the [[ and (( compound commands to set PIPESTATUS with their exit
- status.
-
-d. Fixed some parsing problems with compound array assignments.
-
-e. Added additional configuration changes for: NetBSD (incomplete multibyte
- character support)
-
-f. Fixed two bugs with local array variable creation when shadowing a variable
- of the same name from a previous context.
-
-g. Fixed the `read' builtin to restore the correct set of completion functions
- if a timeout occurs.
-
-h. Added code to defer the initialization of HISTSIZE (and its stifling of the
- history list) until the history file is loaded, allowing a startup file to
- override the default value.
-
-i. Tightened up the arithmetic expression parsing to produce better error
- messages when presented with invalid operators.
-
-j. Fixed the cross-compilation support to build the signal list at shell
- invocation rather than compile time if cross-compiling.
-
-k. Fixed multibyte support for non-gcc compilers (or compilers that do not
- allow automatic array variable sizing based on a non-constant value).
-
-l. Several fixes to the code that manages the list of terminated jobs and
- their exit statuses, and the list of active and recently-terminated jobs
- to avoid pid aliasing/wraparound and allocation errors.
-
-m. Fixed a problem that allowed scripts to die due to SIGINT while waiting
- for children, even when started in the background or otherwise ignoring
- SIGINT.
-
-n. Fixed a bug that caused shells invoked as -/bin/bash from not being
- recognized as login shells.
-
-o. Fixed a problem that caused shells in the background to give the terminal
- to a process group other than the foreground shell process group.
-
-p. Fixed a problem with extracting the `varname' in ${#varname}.
-
-q. Fixed the code that handles SIGQUIT to not exit immediately -- thereby
- calling functions that may not be called in a signal handler context --
- but set a flag and exit afterward (like SIGINT).
-
-r. Changed the brace expansion code to skip over braces that don't begin a
- valid matched brace expansion construct.
-
-s. Fixed `typeset' and `declare' to not require that their shell function
- operands to be valid shell identifiers.
-
-t. Changed `test' to use access(2) with a temporary uid/euid swap when testing
- file attributes and running setuid, and access(2) in most other cases.
-
-u. Changed completion code to not attempt command name completion on a line
- consisting solely of whitespace when no_empty_command_completion is set.
-
-v. The `hash' builtin now prints nothing in posix mode when the hash table is
- empty, and prints a message to that effect to stdout instead of stderr
- when not in posix mode.
-
-w. Fixed a bug in the extended pattern matching code that caused it to fail to
- match periods with certain patterns.
-
-x. Fixed a bug that caused the shell to dump core when performing filename
- generation in directories with thousands of files.
-
-y. Returned to the original Bourne shell rules for parsing ``: no recursive
- parsing of embedded quoted strings or ${...} constructs.
-
-z. The inheritence of the DEBUG, RETURN, and ERR traps is now dependent only
- on the settings of the `functrace' and `errtrace' shell options, rather
- than whether or not the shell is in debugging mode.
-
-aa. Fixed a problem with $HOME being converted to ~ in the expansion of
- members of the DIRSTACK array.
-
-bb. Fixed a problem with quoted arguments to arithmetic expansions in certain
- constructs.
-
-cc. The command word completion code now no longer returns matching directories
- while searching $PATH.
-
-dd. Fixed a bug with zero-padding and precision handling in snprintf()
- replacement.
-
-ee. Fixed a bug that caused the command substitution code not to take embedded
- shell comments into account.
-
-ff. Fixed a bug that caused $((...);(...)) to be misinterpreted as an
- arithmetic substitution.
-
-gg. Fixed a bug in the prompt expansion code that inappropriately added a
- \001 before a \002 under certain circumstances.
-
-hh. Fixed a bug that caused `unset LANG' to not properly reset the locale
- (previous versions would set the locale back to what it was when bash
- was started rather than the system's "native" locale).
-
-ii. Fixed a bug that could cause file descriptors > 10 to not be closed even
- when closed explicitly by a script.
-
-jj. Fixed a bug that caused single quotes to be stripped from ANSI-C quoting
- inside double-quoted command substitutions.
-
-kk. Fixed a bug that could cause core dumps when `return' was executed as the
- last element of a pipeline inside a shell function.
-
-ll. Fixed a bug that caused DEBUG trap strings to overwrite commands stored in
- the jobs list.
-
-2. Changes to Readline
-
-a. Fixed a problem that caused segmentation faults when using readline in
- callback mode and typing consecutive DEL characters on an empty line.
-
-b. Fixed several redisplay problems with multibyte characters, all having to
- do with the different code paths and variable meanings between single-byte
- and multibyte character redisplay.
-
-c. Fixed a problem with key sequence translation when presented with the
- sequence \M-\C-x.
-
-d. Fixed a problem that prevented the `a' command in vi mode from being
- undone and redone properly.
-
-e. Fixed a problem that prevented empty inserts in vi mode from being undone
- properly.
-
-f. Fixed a problem that caused readline to initialize with an incorrect idea
- of whether or not the terminal can autowrap.
-
-g. Fixed output of key bindings (like bash `bind -p') to honor the setting of
- convert-meta and use \e where appropriate.
-
-h. Changed the default filename completion function to call the filename
- dequoting function if the directory completion hook isn't set. This means
- that any directory completion hooks need to dequote the directory name,
- since application-specific hooks need to know how the word was quoted,
- even if no other changes are made.
-
-i. Fixed a bug with creating the prompt for a non-interactive search string
- when there are non-printing characters in the primary prompt.
-
-j. Fixed a bug that caused prompts with invisible characters to be redrawn
- multiple times in a multibyte locale.
-
-k. Fixed a bug that could cause the key sequence scanning code to return the
- wrong function.
-
-l. Fixed a problem with the callback interface that caused it to fail when
- using multi-character keyboard macros.
-
-m. Fixed a bug that could cause a core dump when an edited history entry was
- re-executed under certain conditions.
-
-n. Fixed a bug that caused readline to reference freed memory when attmpting
- to display a portion of the prompt.
-
-3. New Features in Bash
-
-a. Changed the parameter pattern replacement functions to not anchor the
- pattern at the beginning of the string if doing global replacement - that
- combination doesn't make any sense.
-
-b. When running in `word expansion only' mode (--wordexp option), inhibit
- process substitution.
-
-c. Loadable builtins now work on MacOS X 10.[34].
-
-d. Shells running in posix mode no longer set $HOME, as POSIX requires.
-
-e. The code that checks for binary files being executed as shell scripts now
- checks only for NUL rather than any non-printing character.
-
-f. Quoting the string argument to the [[ command's =~ operator now forces
- string matching, as with the other pattern-matching operators.
-
-4. New Features in Readline
-
-a. Calling applications can now set the keyboard timeout to 0, allowing
- poll-like behavior.
-
-b. The value of SYS_INPUTRC (configurable at compilation time) is now used as
- the default last-ditch startup file.
-
-c. The history file reading functions now allow windows-like \r\n line
- terminators.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-release,
-and the previous version, bash-3.1-rc2.
-
-1. Changes to Readline
-
-a. Several changes to the multibyte redisplay code to fix problems with
- prompts containing invisible characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-rc2,
-and the previous version, bash-3.1-rc1.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused a DEBUG trap to overwrite a command string that's
- eventually attached to a background job.
-
-b. Changed some code so that filenames with leading tildes with spaces in the
- name aren't tilde-expanded by the bash completion code.
-
-c. Fixed a bug that caused the pushd builtin to fail to change to
- directories with leading `-'.
-
-d. Fixed a small memory leak in the programmable completion code.
-
-2. Changes to Readline
-
-a. Fixed a redisplay bug caused by moving the cursor vertically to a line
- with invisible characters in the prompt in a multibyte locale.
-
-b. Fixed a bug that could cause the terminal special chars to be bound in the
- wrong keymap in vi mode.
-
-3. New Features in Bash
-
-a. If compiled for strict POSIX conformance, LINES and COLUMNS may now
- override the true terminal size.
-
-4. New Features in Readline
-
-a. A new external application-controllable variable that allows the LINES
- and COLUMNS environment variables to set the window size regardless of
- what the kernel returns.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-rc1,
-and the previous version, bash-3.1-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug that could cause core dumps due to accessing the current
- pipeline while in the middle of modifying it.
-
-b. Fixed a bug that caused pathnames with backslashes still quoting characters
- to be passed to opendir().
-
-c. Command word completion now obeys the setting of completion-ignore-case.
-
-d. Fixed a problem with redirection that caused file descriptors greater than
- 2 to be inappropriately marked as close-on-exec.
-
-e. In Posix mode, after `wait' is called to wait for a particular process
- explicitly, that process is removed from the list of processes known to
- the shell, and subsequent attempts to wait for it return errors.
-
-f. Fixed a bug that caused extended pattern matching to incorrectly scan
- backslash-escaped pattern characters.
-
-g. Fixed a synchronization problem that could cause core dumps when handling
- a SIGWINCH.
-
-h. Fixed a bug that caused an unmatched backquote to be accepted without an
- error when processing here documents.
-
-i. Fixed a small memory leak in the `cd' builtin.
-
-j. Fix for MacOS X so it gets the values for the HOSTTYPE, MACHTYPE, and
- OSTYPE variables at build time, to support universal binaries.
-
-k. Fixed a bug that could cause an exit trap to return the exit status of
- the trap command rather than the status as it was before the trap was
- run as the shell's exit status.
-
-2. New Features in Bash
-
-3. Changes to Readline
-
-a. Fixed a bug that caused reversing the incremental search direction to
- not work correctly.
-
-b. Fixed the vi-mode `U' command to only undo up to the first time insert mode
- was entered, as Posix specifies.
-
-c. Fixed a bug in the vi-mode `r' command that left the cursor in the wrong
- place.
-
-4. New Features in Readline
-
-a. New application-callable auxiliary function, rl_variable_value, returns
- a string corresponding to a readline variable's value.
-
-b. When parsing inputrc files and variable binding commands, the parser
- strips trailing whitespace from values assigned to boolean variables
- before checking them.
-
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-beta1,
-and the previous version, bash-3.1-alpha1.
-
-1. Changes to Bash
-
-a. Added some system-specific signal names.
-
-b. Fixed a typo in the ulimit builtin to make `x' the right option to
- maniuplate the limit on file locks.
-
-c. Fixed a problem with using += to append to index 0 of an array variable
- when not using subscript syntax.
-
-d. A few changes to configure.in to remove calls to obsolete or outdated
- macros.
-
-e. Make sure changes to variables bash handles specially (e.g., LC_ALL) are
- made when the variable is set in the temporary environment to a command.
-
-f. Make sure changes to variables bash handles specially (e.g., LC_ALL) are
- made when the variable is modified using `printf -v'.
-
-g. The export environment is now remade on cygwin when HOME is changed, so
- DLLs bash is linked against pick up the new value. This fixes problems
- with tilde expansion when linking against and already-installed readline.
-
-h. Small fix to the logic for performing tilde expansion in posix mode, so
- expansion on the right-hand side of an assignment statement takes place.
-
-i. Fixed a bug that prevented redirections associated with a shell function
- from being executed when in a subshell.
-
-j. Fixed `source' and `.' builtins to not require an executable file when
- searching $PATH for a file to source.
-
-k. Fixed a bug that caused incorrect word splitting in a function when IFS
- was declared local, then unset.
-
-l. Fixed a problem with the `kill' builtin that prevented sending signals
- to a process group under certain circumstances when providing a pid < 0.
-
-m. When in POSIX mode, `pwd' now checks that the value it prints is the same
- directory as `.', even when displaying $PWD.
-
-n. Fixed a problem with the `read' builtin when reading a script from standard
- input and reading data from the same file.
-
-o. Fixed a problem with the `type' and `command' builtins that caused absolute
- pathnames to be displayed incorrectly.
-
-p. Some changes to the `bg' builtin for POSIX conformance.
-
-q. The `fc' builtin now removes the `fc' command that caused it to invoke an
- editor on specified history entries from the history entirely, rather than
- simply ignoring it.
-
-r. When in POSIX mode, the `v' command in vi editing mode simply invokes vi
- on the current command, rather than checking $FCEDIT and $EDITOR.
-
-s. Fixed a small memory leak in the pathname canonicalization code.
-
-t. Fixed a bug that caused the expanded value of a $'...' string to be
- incorrectly re-quoted if it occurred within a double-quoted ${...}
- parameter expansion.
-
-u. Restored default emacs-mode key binding of M-TAB to dynamic-complete-history.
-
-v. Fixed a bug that caused core dumps when interrupting loops running builtins
- on some systems.
-
-w. Make sure that some of the functions bash provides replacements for are
- not cpp defines.
-
-x. The code that scans embedded commands for the parser (`...` and $(...)) is
- now more aware of embedded comments and their effect on quoted strings.
-
-y. Changed the `-n' option to the `history' builtin to not reset the number of
- history lines read in the current session after reading the new lines from
- the history file if the history is being appended when it is written to
- the file, since the appending takes care of the problem that the adjustment
- was intended to solve.
-
-z. Improved the error message displayed when a shell script fails to execute
- because the environment and size of command line arguments are too large.
-
-aa. A small fix to make sure that $HISTCMD is evaluated whenever the shell is
- saving commands to the history list, not just when HISTSIZE is defined.
-
-2. Changes to Readline
-
-a. The `change-case' command now correctly changes the case of multibyte
- characters.
-
-b. Changes to the shared library construction scripts to deal with Windows
- DLL naming conventions for Cygwin.
-
-c. Fixed the redisplay code to avoid core dumps resulting from a poorly-timed
- SIGWINCH.
-
-d. Fixed the non-incremental search code in vi mode to dispose of any current
- undo list when copying a line from the history into the current editing
- buffer.
-
-e. The variable assignment code now ignores whitespace at the end of lines
- when assigning to boolean variables.
-
-f. The `C-w' binding in incremental search now understands multibyte
- characters.
-
-3. New Features in Bash
-
-a. A new configuration option, `--enable-strict-posix-default', which will
- build bash to be POSIX conforming by default.
-
-4. New Features in Readline
-
-a. If the rl_completion_query_items is set to a value < 0, readline never
- asks the user whether or not to view the possible completions.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-alpha1,
-and the previous version, bash-3.0-release.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused bash to crash if referencing an unset local array.
-
-b. Fixed a problem that caused tilde expansion to not be performed before
- attempting globbing word completion.
-
-c. Fixed an incompatibility so that a first argument to trap that's a valid
- signal number will be trated as a signal rather than a command to execute.
-
-d. Fixed ${#word} expansion to correctly compute the length of a string
- containing multibyte characters.
-
-e. Fixed a bug that caused bash to not pass the correct flags for signal
- disposition to child processes.
-
-f. Fixed a bug that caused `fc -l' to list one too many history entries.
-
-g. Some fixes to `fc' for POSIX conformance.
-
-h. Some fixes to job status display for POSIX conformance.
-
-i. Fixed a bug that caused `command -v' to display output if a command was not
- found -- it should be silent.
-
-j. In POSIX mode, `type' and `command -[vV]' do not report non-executable
- files, even if the shell will attempt to execute them.
-
-k. Fixed a bug that caused the `==' operator to the [[ command to not attempt
- extended pattern matching.
-
-l. Fixed the brace expansion code to handle characters whose value exceeds 128.
-
-m. Fixed `printf' to handle strings with a leading `\0' whose length is
- non-zero.
-
-n. Fixed a couple of problems with brace expansion where `${' was handled
- incorrectly.
-
-o. Fixed off-by-one error when calculating the upper bound of `offset' when
- processing the ${array[@]:offset:length} expansion.
-
-p. System-specific configuration changes for: FreeBSD 5.x, Interix, MacOS X
- 10.4, Linux 2.4+ kernels, Linux 3.x kernels, Dragonfly BSD, QNX 6.x,
- Cygwin
-
-q. Fixed a bug that caused the shell to ignore the status of the rightmost
- command in a pipeline when the `pipefail' option was enabled.
-
-r. Fixed a completion bug that caused core dumps when expanding a directory
- name.
-
-s. Fixed a bug that prevented `hash -d' from removing commands from the hash
- table.
-
-t. Fixed word splitting to avoid really bad quadratic performance when
- expanding long lists.
-
-u. Fixed a bug that caused negative offsets in substring expansion to use the
- wrong values.
-
-v. Fixed a bug in printf that caused it to not return failure on write errors.
-
-w. Fixed a bug that caused commands in subshells to not be properly timed.
-
-x. The shell parser no longer attempts to parse a compound assignment specially
- unless in a position where an assignment statement is acceptable or parsing
- arguments to a builtin that accepts assignment statements.
-
-y. Fixed a problem that caused a `case' statement to be added to the history
- incorrectly as a single command if the `case word' was on one line and the
- `in' on another.
-
-z. Fixed a problem that caused internal shell quoting characters to be
- incorrectly quoted with backslashes under some circumstances.
-
-aa. The shell now performs correct word splitting when IFS contains multibyte
- characters.
-
-bb. The mail checking code now resets the cached file information if the size
- drops to 0, even if the times don't change.
-
-cc. A completed command name that is found in $PATH as well as the name of a
- directory in the current directory no longer has a slash appended in certain
- circumstances: a single instance found in $PATH when `.' is not in $PATH,
- and multiple instances found in $PATH, even when `.' is in $PATH.
-
-dd. Incorporated tilde expansion into the word expansion code rather than as a
- separately-called function, fixing some cases where it was performed
- inappropriately (e.g., after the second `=' in an assignment statement or
- in a double-quoted parameter expansion).
-
-ee. Fixed several bugs encountered when parsing compound assignment statements,
- so that compound assignments appearing as arguments to builtins are no
- longer double-expanded.
-
-ff. Fixed a bug in the command execution code that caused asynchronous commands
- containing command substitutions to not put the terminal in the wrong
- process group.
-
-gg. Bash now handles the case where the WCONTINUED flag causes waitpid() to
- return -1/EINVAL at runtime as well as configuration time.
-
-hh. Fixed parser to generate an error when the pipeline `argument' to `!' or
- `time' is NULL.
-
-ii. The shell now takes a little more care when manipulating file descriptors
- greater than 9 with the `exec' builtin.
-
-jj. Fixed a bug that caused variable assignments preceding the `command' builtin
- preceding a special builtin to be preserved after the command completed in
- POSIX mode.
-
-kk. Fixed a bug that allowed variables beginning with a digit to be created.
-
-ll. Fixed a bug that caused a \<newline> to be removed when parsing a $'...'
- construct.
-
-mm. A shell whose name begins with `-' will now be a restricted shell if the
- remainder of the name indicates it should be restricted.
-
-nn. Fixed a bug that could cause a core dump if FUNCNAME were changed or unset
- during a function's execution.
-
-oo. Fixed a bug that caused executing a `return' in a function to not execute
- a RETURN trap. The RETURN trap is inherited by shell functions only if
- function tracing is globally enabled or has been enabled for that function.
-
-pp. Fixed cases where var[@] was not handled exactly like var, when var is a
- scalar variable.
-
-qq. Fixed a bug that caused the first character after a SIGINT to be discarded
- under certain circumstances.
-
-rr. Fixed exit status code so that a suspended job returns 128+signal as its
- exit status (preventing commands after it in `&&' lists from being
- executed).
-
-ss. Fixed a bug that caused the shell parser state to be changed by executing
- a shell function as a result of word completion.
-
-tt. Fixed a long-standing bug that caused '\177' characters in variable
- values to be discarded when expanded in double-quoted strings.
-
-uu. Fixed a bug that caused $RANDOM to be re-seeded multiple times in a
- subshell environment.
-
-vv. Extensive changes to the job management code to avoid the pid-reuse and
- pid-aliasing problems caused by retaining the exit status of too many jobs,
- but still retain as many background job statuses as POSIX requires.
-
-ww. Fixed a parser bug in processing \<newline> that caused things like
-
- ((echo 5) \
- (echo 6))
-
- to not work correctly.
-
-xx. `pwd -P' now sets $PWD to a directory name containing no symbolic links
- when in posix mode, as POSIX requires.
-
-yy. In posix mode, bash no longer sets $PWD to a name containing no symbolic
- links if a directory is chosen from $CDPATH.
-
-zz. The word splitting code now treats an IFS character that is not space,
- tab, or newline and any adjacent IFS white space as a single delimiter, as
- SUSv3/XPG6 require.
-
-aaa. The `read' builtin now checks whether or not the number of fields read is
- exactly the same as the number of variables instead of just assigning the
- rest of the line (minus any trailing IFS white space) to the last
- variable. This is what POSIX/SUS/XPG all require.
-
-bbb. Fixed a bug that caused `read' to always check whether or not fd 0 was a
- pipe, even when reading from another file descriptor.
-
-ccc. Fixed a bug that caused short-circuiting of execution even if the return
- value was being inverted.
-
-ddd. Fixed a bug that caused a core dump while decoding \W escapes in PS1 if
- PWD was unset.
-
-eee. Fixed a bug in `read' that counted internal quoting characters for the
- purposes of `read -n'.
-
-fff. Fixed a bug so that a function definition in a pipeline causes a child
- process to be forked at the right time.
-
-ggg. Bash will not attempt to link against a readline library that doesn't
- have rl_gnu_readline_p == 1.
-
-hhh. Fixed a bug that caused `read' to consume one too many characters when
- reading a fixed number of characters and the Nth character is a backslash.
-
-iii. Fixed a bug that caused `unset' on variables in the temporary environment
- to leave them set when `unset' completed.
-
-jjj. Fixed a bug that caused bash to close fd 2 if an `exec' failed and the
- shell didn't exit.
-
-kkk. The completion code is more careful to not turn `/' or `///' into `//',
- for those systems on which `//' has special meaning.
-
-lll. Fixed a bug that caused command substitution in asynchronous commands to
- close the wrong file descriptors.
-
-mmm. The shell no longer prints status messages about terminated background
- processes unless job control is active.
-
-nnn. Fixed a bug that prevented multiple consecutive invocations of `history -s'
- from adding all the commands to the history list.
-
-ooo. Added a couple of changes to make arithmetic expansion more consistent in
- all its contexts (still not perfect).
-
-ppp. Fixed a bug that caused the parser to occasionally not find the right
- terminating "`" in an old-style command substitution.
-
-qqq. Fixed a bug that caused core dumps when the shell was reading its non-
- interactive input from fd 0 and fd 0 was duplicated and restored using a
- combination of `exec' (to save) and redirection (to restore).
-
-rrr. Fixed a problem that caused loops in sourced scripts to not be cleaned
- up properly when a `return' is executed.
-
-sss. Change internal command substitution completion function to append a slash
- to directory names in the command.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused multiliine prompts to be wrapped and displayed
- incorrectly.
-
-b. Fixed a bug that caused ^P/^N in emacs mode to fail to display the current
- line correctly.
-
-c. Fixed a problem in computing the number of invisible characters on the first
- line of a prompt whose length exceeds the screen width.
-
-d. Fixed vi-mode searching so that failure preserves the current line rather
- than the last line in the history list.
-
-e. Fixed the vi-mode `~' command (change-case) to have the correct behavior at
- end-of-line when manipulating multibyte characters.
-
-f. Fixed the vi-mode `r' command (change-char) to have the correct behavior at
- end-of-line when manipulating multibyte characters.
-
-g. Fixed multiple bugs in the redisplay of multibyte characters: displaying
- prompts longer than the screen width containing multibyte characters,
-
-h. Fix the calculation of the number of physical characters in the prompt
- string when it contains multibyte characters.
-
-i. A non-zero value for the `rl_complete_suppress_append' variable now causes
- no `/' to be appended to a directory name.
-
-j. Fixed forward-word and backward-word to work when words contained
- multibyte characters.
-
-k. Fixed a bug in finding the delimiter of a `?' substring when performing
- history expansion in a locale that supports multibyte characters.
-
-l. Fixed a memory leak caused by not freeing the timestamp in a history entry.
-
-m. Fixed a bug that caused "\M-x" style key bindings to not obey the setting
- of the `convert-meta' variable.
-
-n. Fixed saving and restoring primary prompt when prompting for incremental
- and non-incremental searches; search prompts now display multibyte
- characters correctly.
-
-o. Fixed a bug that caused keys originally bound to self-insert but shadowed
- by a multi-character key sequence to not be inserted.
-
-p. Fixed code so rl_prep_term_function and rl_deprep_term_function aren't
- dereferenced if NULL (matching the documentation).
-
-q. Extensive changes to readline to add enough state so that commands
- requiring additional characters (searches, multi-key sequences, numeric
- arguments, commands requiring an additional specifier character like
- vi-mode change-char, etc.) work without synchronously waiting for
- additional input.
-
-r. Lots of changes so readline builds and runs on MinGW.
-
-s. Readline no longer tries to modify the terminal settings when running in
- callback mode.
-
-t. The Readline display code no longer sets the location of the last invisible
- character in the prompt if the \[\] sequence is empty.
-
-3. New Features in Bash
-
-a. Bash now understands LC_TIME as a special variable so that time display
- tracks the current locale.
-
-b. BASH_ARGC, BASH_ARGV, BASH_SOURCE, and BASH_LINENO are no longer created
- as `invisible' variables and may not be unset.
-
-c. In POSIX mode, if `xpg_echo' option is enabled, the `echo' builtin doesn't
- try to interpret any options at all, as POSIX requires.
-
-d. The `bg' builtin now accepts multiple arguments, as POSIX seems to specify.
-
-e. Fixed vi-mode word completion and glob expansion to perform tilde
- expansion.
-
-f. The `**' mathematic exponentiation operator is now right-associative.
-
-g. The `ulimit' builtin has new options: -i (max number of pending signals),
- -q (max size of POSIX message queues), and -x (max number of file locks).
-
-h. A bare `%' once again expands to the current job when used as a job
- specifier.
-
-i. The `+=' assignment operator (append to the value of a string or array) is
- now supported for assignment statements and arguments to builtin commands
- that accept assignment statements.
-
-j. BASH_COMMAND now preserves its value when a DEBUG trap is executed.
-
-k. The `gnu_errfmt' option is enabled automatically if the shell is running
- in an emacs terminal window.
-
-l. New configuration option: --single-help-strings. Causes long help text
- to be written as a single string; intended to ease translation.
-
-m. The COMP_WORDBREAKS variable now causes the list of word break characters
- to be emptied when the variable is unset.
-
-n. An unquoted expansion of $* when $IFS is empty now causes the positional
- parameters to be concatenated if the expansion doesn't undergo word
- splitting.
-
-o. Bash now inherits $_ from the environment if it appears there at startup.
-
-p. New shell option: nocasematch. If non-zero, shell pattern matching ignores
- case when used by `case' and `[[' commands.
-
-q. The `printf' builtin takes a new option: -v var. That causes the output
- to be placed into var instead of on stdout.
-
-r. By default, the shell no longer reports processes dying from SIGPIPE.
-
-s. Bash now sets the extern variable `environ' to the export environment it
- creates, so C library functions that call getenv() (and can't use the
- shell-provided replacement) get current values of environment variables.
-
-4. New Features in Readline
-
-a. The key sequence sent by the keypad `delete' key is now automatically
- bound to delete-char.
-
-b. A negative argument to menu-complete now cycles backward through the
- completion list.
-
-c. A new bindable readline variable: bind-tty-special-chars. If non-zero,
- readline will bind the terminal special characters to their readline
- equivalents when it's called (on by default).
-
-d. New bindable command: vi-rubout. Saves deleted text for possible
- reinsertion, as with any vi-mode `text modification' command; `X' is bound
- to this in vi command mode.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-release,
-and the previous version, bash-3.0-rc1.
-
-1. Changes to Bash
-
-a. Fixed a boundary overrun that could cause segmentation faults when the
- completion code hands an incomplete construct to the word expansion
- functions.
-
-b. Changed posix mode behavior so that an error in a variable assignment
- preceding a special builtin causes a non-interactive shell to exit.
-
-c. Change the directory expansion portion of the completion code to not
- expand embedded command substitutions if the directory name appears in
- the file system.
-
-d. Fixed a problem that caused `bash -r' to turn on restrictions before
- reading the startup files.
-
-e. Fixed a problem with the default operation of the `umask' builtin.
-
-2. Changes to Readline
-
-a. Fixed a problem with readline saving the contents of the current line
- before beginning a non-interactive search.
-
-b. Fixed a problem with EOF detection when using rl_event_hook.
-
-c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric
- arguments.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-rc1,
-and the previous version, bash-3.0-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused incorrect behavior when referecing element 0 of
- an array using $array, element 0 was unset, and `set -u' was enabled.
-
-b. System-specific changes for: SCO Unix 3.2, Tandem.
-
-c. Fixed a bug that caused inappropriate word splitting when a variable was
- expanded within a double-quoted string that also included $@.
-
-d. Fixed a bug that caused `pwd' to not display anything in physical mode
- when the file system had changed underneath the shell.
-
-e. Fixed a bug in the pre- and post- increment and decrement parsing in the
- expression evaluator that caused errors when the operands and corresponding
- operators were separated by whitespace.
-
-f. Fixed a bug that caused `history -p' to add an entry to the history list,
- counter to the documentation. (Keeps the history expansions invoked by
- emacs-mode command line editing from doing that as well.)
-
-g. Fixed a bug that could cause a core dump if `cd' is asked to print out a
- pathname longer than PATH_MAX characters.
-
-h. Fixed a bug that caused jobs to be put into the wrong process group under
- some circumstances after enabling job control with `set -m'.
-
-i. `unalias' now returns failure if no alias name arguments are supplied.
-
-j. Documented the characters not allowed to appear in an alias name.
-
-k. $* is no longer expanded as if in double quotes when it appears in the
- body of a here document, as the SUS seems to require.
-
-l. The `bashbug' script now uses a directory in $TMPDIR for exclusive
- access rather than trying to guess how the underlying OS provides for
- secure temporary file creation.
-
-m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames
- longer than PATH_MAX characters.
-
-n. Fixed a memory leak caused when creating multiple local array variables
- with identical names.
-
-o. Fixed a problem with calls to getcwd() so that bash now operates better
- when the full pathname to the current directory is longer than PATH_MAX
- bytes.
-
-p. The `trap' builtin now reports an error if a single non-signal argument
- is specified.
-
-q. Fixed a bug that caused `umask' to not work correctly when presented
- with a mask of all 0s.
-
-r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX
- appears to specify.
-
-s. Interactive mode now depends on whether or not stdin and stderr are
- connected to a tty; formerly it was stdin and stdout. POSIX requires
- this.
-
-t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the
- right kind of filename generation).
-
-2. Changes to Readline
-
-a. Fixed a problem that could cause readline to refer to freed memory when
- moving between history lines while doing searches.
-
-b. Improvements to the code that expands and displays prompt strings
- containing multibyte characters.
-
-c. Fixed a problem with vi-mode not correctly remembering the numeric argument
- to the last `c'hange command for later use with `.'.
-
-d. Fixed a bug in vi-mode that caused multi-digit count arguments to work
- incorrectly.
-
-e. Fixed a problem in vi-mode that caused the last text modification command
- to not be remembered across different command lines.
-
-f. Fixed problems with changing characters and changing case at the end of
- the line.
-
-3. New Features in Bash
-
-a. The `jobs', `kill', and `wait' builtins now accept job control notation
- even if job control is not enabled.
-
-b. The historical behavior of `trap' that allows a missing `action' argument
- to cause each specified signal's handling to be reset to its default is
- now only supported when `trap' is given a single non-option argument.
-
-4. New Features in Readline
-
-a. When listing completions, directories have a `/' appended if the
- `mark-directories' option has been enabled.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-beta1,
-and the previous version, bash-3.0-alpha.
-
-1. Changes to Bash
-
-a. Fixes to build correctly when arrays are not compiled into the shell.
-
-b. Fixed command substitution to run any exit trap defined in the command
- substitution before returning; the exit trap is not inherited from the
- calling shell.
-
-c. Fixes to process group synchronization code so that every child process
- attempts to set the terminal's process group; fixes some synchronization
- problems on Linux kernels that schedule the child to always run before
- the parent.
-
-d. Fixed processing of octal and hex constants in printf builtin for POSIX.2
- compliance.
-
-e. Fixed a couple of core dumps in the pattern removal code.
-
-f. Fixes to the array subrange extraction code to deal better with sparse
- arrays.
-
-g. Parser errors and other errors that result in the shell exiting now cause
- the exit trap to be run.
-
-h. Change the command substitution completion functions to not append any
- closing quote, because it would be inserted a closing "`" or ")".
-
-i. Fix history initialization so assignments to $histchars made in startup
- files are honored.
-
-j. If an exit trap does not contain a call to `exit', the shell now uses
- the exit status of the last command executed before the trap as the exit
- status of the shell.
-
-k. The parser now prompts with $PS2 if it reads a newline while parsing a
- compound array assignment statement.
-
-l. When performing a compound array assignment, the parser doesn't treat
- words of the form [index]=value as assignments if they're the result of
- expansions.
-
-m. Fixed a bug that caused `return' executed in a trap command to make the
- shell think it was still running the trap.
-
-n. Fixed the value of errno set by the pathname canonicalization functions.
-
-o. Changed the grammar so that `time' alone on a line times a null command
- rather than being a syntax error.
-
-p. The pattern substitution code no longer performs quote removal on the
- pattern before trying to match it, as the pattern removal functions do.
-
-q. Fixed a bug that could cause core dumps when checking whether a quoted
- command name was being completed.
-
-r. Fixes to the pattern removal and pattern replacement expansions to deal
- with multibyte characters better (and faster).
-
-s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly
- multibyte) characters instead of raw bytes.
-
-t. Fixed a bug that caused some key bindings set in an inputrc to be ignored
- at shell startup.
-
-u. Fixed a bug that caused unsetting a local variable within a function to
- not work correctly.
-
-v. Fixed a bug that caused invalid variables to be created when using
- `read -a'.
-
-w. Fixed a bug that caused "$@" to expand incorrectly when used as the right
- hand side of a parameter expansion such as ${word:="$@"} if the first
- character of $IFS was not a space.
-
-x. Fixed a slight cosmetic problem when printing commands containing a
- `>&word' redirection.
-
-y. Fixed a problem that could cause here documents to not be created correctly
- if the system temporary directory did not allow writing.
-
-2. Changes to Readline
-
-a. Change to history expansion functions to treat `^' as equivalent to word
- one, as the documention states.
-
-b. Some changes to the display code to improve display and redisplay of
- multibyte characters.
-
-c. Changes to speed up the multibyte character redisplay code.
-
-d. Fixed a bug in the vi-mode `E' command that caused it to skip over the
- last character of a word if invoked while point was on the word's
- next-to-last character.
-
-e. Fixed a bug that could cause incorrect filename quoting when
- case-insensitive completion was enabled and the word being completed
- contained backslashes quoting word break characters.
-
-f. Fixed a bug in redisplay triggered when the prompt string contains
- invisible characters.
-
-g. Fixed some display (and other) bugs encountered in multibyte locales
- when a non-ascii character was the last character on a line.
-
-h. Fixed some display bugs caused by multibyte characters in prompt strings.
-
-i. Fixed a problem with history expansion caused by non-whitespace characters
- used as history word delimiters.
-
-3. New Features in Bash
-
-a. printf builtin understands two new escape sequences: \" and \?.
-
-b. `echo -e' understands two new escape sequences: \" and \?.
-
-c. The GNU `gettext' package and libintl have been integrated; the shell's
- messages can be translated into different languages.
-
-d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'.
-
-e. The error message printed when bash cannot open a shell script supplied
- as argument 1 now includes the name of the shell, to better identify
- the error as coming from bash.
-
-4. New Features in Readline
-
-a. New application variable, rl_completion_quote_character, set to any
- quote character readline finds before it calls the application completion
- function.
-
-b. New application variable, rl_completion_suppress_quote, settable by an
- application completion function. If set to non-zero, readline does not
- attempt to append a closing quote to a completed word.
-
-c. New application variable, rl_completion_found_quote, set to a non-zero
- value if readline determines that the word to be completed is quoted.
- Set before readline calls any application completion function.
-
-d. New function hook, rl_completion_word_break_hook, called when readline
- needs to break a line into words when completion is attempted. Allows
- the word break characters to vary based on position in the line.
-
-e. New bindable command: unix-filename-rubout. Does the same thing as
- unix-word-rubout, but adds `/' to the set of word delimiters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-alpha,
-and the previous version, bash-2.05b-release.
-
-1. Changes to Bash
-
-a. Fixes so that the shell will compile without some of the default options
- defined.
-
-b. Fixed an error message that did not pass enough arguments to printf.
-
-c. Fixed a bug that caused input redirection to a builtin inside a script
- being read from standard input to result in the rest of the already-
- read and buffered script to be discarded.
-
-d. Fixed a bug that caused subshell initialization to close the file
- descriptor from which the shell was reading a script under certain
- circumstances.
-
-e. Fixed a bug that caused the shell to not advance a string pointer over
- a null wide character when doing string operations.
-
-f. Fixed the internal logout code so that shells that time out waiting for
- input (using $TMOUT) run ~/.bash_logout.
-
-g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD.
-
-h. The parser no longer adds implicit double quotes to ((...)) arithmetic
- commands.
-
-i. The ((...)) arithmetic command evaluation code was fixed to not dump core
- when the expanded string is null.
-
-j. The ((...)) arithmetic command evaluation code was fixed to not perform
- variable assignments while expanding the expression.
-
-k. Fixed a bug that caused word splitting to be performed incorrectly when
- IFS is set, but null.
-
-l. Fixed a bug in brace expansion that caused a quoted `$' preceding an
- open brace to inhibit brace expansion.
-
-m. Fixed a bug that caused a leading `-' in the shell's name to cause it to
- not be recognized as a restricted shell.
-
-n. Fixed a bug in the arithmetic evaluation code that could cause longjmps
- to an invalid location and result in a core dump.
-
-o. Fixed a bug in the calculation of how many history lines are new in a
- single shell session when reading new history lines from a file with
- `history -n'.
-
-p. Fixed a bug in pathname canonicalization that caused the shell to dump
- core when presented with a pathname longer than PATH_MAX.
-
-q. Fixed the parser so that it doesn't try to compare a char variable to
- EOF, which fails when chars are unsigned.
-
-r. Fixed a bug in the simple command execution code that caused occasional
- core dumps.
-
-s. The shell does a better job of saving any partial parsing state during
- operations which cause a command to be executed while a line is being
- entered and parsed.
-
-t. The completion code now splits words more like the expansion code when
- $IFS is used to split.
-
-u. The locale code does a better job of recomputing the various locale
- variable values when LC_ALL is unset.
-
-v. The programmable completion code does a better job of dequoting expanded
- word lists before comparing them against the word to be matched.
-
-w. The shell no longer seg faults if the expanded value of $PS4 is null
- and `set -x' is enabled.
-
-x. Fixed a bug that caused core dumps when a here string expanded to NULL.
-
-y. The mail checking code now makes sure the mailbox is bigger before
- reporting the existence of new mail.
-
-z. The parser does not try to expand $'...' and $"..." when the appear
- within double quotes unless the `extquote' option has been enabled with
- `shopt'. For backwards compatibility, it is enabled by default.
-
-aa. Fixed a bug that caused `for x; do ...' and `select x; do ... to use
- $@ instead of "$@" for the implicit list of arguments.
-
-bb. Fixed a bug that caused a subshell of a restricted shell (e.g., one
- spawned to execute a pipeline) to not exit immediately if attempting
- to use a command containing a slash.
-
-cc. Fixed a problem with empty replacements for a pattern that doesn't match
- when performing ${param/word/} expansion.
-
-dd. Word expansions performed while expanding redirections no longer search
- a command's temporary environment to expand variable values.
-
-ee. Improvements to the alias expansion code when expanding subsequent words
- because an aliase's value ends with a space.
-
-ff. `cd -' now prints the current working directory after a successful chdir
- even when the shell is not interactive, as the standard requires.
-
-gg. The shell does a better job of ensuring a child process dies of SIGINT
- before resending SIGINT to itself.
-
-hh. The arithmetic expansion variable assignment code now does the right
- thing when assigning to `special' variables like OPTIND.
-
-ii. When history expansion verification is enabled, the bash readline helper
- functions that do history expansion on the current line don't print
- the results.
-
-jj. Fixed bugs with multiple consecutive alias expansion when one of the
- expansions ends with a space.
-
-kk. Fixed a problem in the programmable completion code that could cause core
- dumps when trying to initialize a set of possible completions from a
- list of variables.
-
-ll. The \[ and \] escape characters are now ignored when decoding the prompt
- string if the shell is started with editing disabled.
-
-mm. Fixed a bug that could leave extra characters in a string when doing
- quoted null character removal.
-
-nn. Command substitution and other subshell operations no longer reset the
- line number (aids the bash debugger).
-
-oo. Better line number management when executing simple commands, conditional
- commands, for commands, and select commands.
-
-pp. The globbing code now uses malloc, with its better failure properties,
- rather than alloca().
-
-qq. Fixed a bug that caused expansions like #{a[2]:=value} to create the
- appropriate array element instead of a variable named `a[2]'.
-
-rr. Fixed a bug in the handling of a `?(...)' pattern immediately following
- a `*' when extglob is enabled.
-
-ss. Fixed a bug that caused a `return' invoked in an exit trap when exit is
- invoked in a function to misbehave.
-
-tt. Fixed a bug that caused CTLESC and CTLNUL characters to not be escaped
- by the internal shell string quoting functions.
-
-uu. Fixed a bug that caused quoted null characters in an expanded word list
- to be inappropriately assigned to an array variable when using `read -a'.
-
-vv. Fixed a bug that caused redirections accompanying a null command to persist
- in the current shell.
-
-ww. Fixed a bug that caused the prompt to be printed when the shell was
- expanding a multiline alias.
-
-xx. Fixed a bug that resulted in core dumps when the completion for a command
- changed the compspec.
-
-yy. Fixed a bug that caused evaluation of programmable completions to print
- notifications of completed jobs.
-
-zz. Bash now disables line editing when $EMACS == `t' and $TERM == `dumb'
- (which is what emacs shell windows do).
-
-aaa. In posix mode, `kill -l' causes signal names to be displayed without
- a leading `SIG'.
-
-bbb. Clear error flag on standard output so it doesn't persist across multiple
- builtin commands.
-
-ccc. In posix mode, `alias' displays alias values without the leading `alias',
- so the output cannot be used as subsequent input.
-
-ddd. In posix mode, the `trap' builtin doesn't check whether or not its
- first argument is a signal specification and revert the signal handling
- to its original disposition if it is.
-
-eee. Fixed several bugs in the handling of "$*" and "${array[*]}" by the
- pattern substitution and removal expansions.
-
-fff. Fixed several problems with the handling of ${array[@]}, ${array[*]},
- $@, and $* by the indirect variable expansion code.
-
-ggg. Fixed a bug that did not allow `time' to be aliased.
-
-hhh. Improved the mail checking code so it won't check (and possibly cause an
- NFS file system mount) until MAILPATH or MAIL is given a value -- there
- is no default if DEFAULT_MAIL_DIRECTORY is not defined at compile time.
- (It is computed by configure, but can be #undef'd in config-bot.h.)
-
-iii. If the `chkwinsize' option is enabled, the shell checks for window size
- changes if a child process exits due to a signal.
-
-jjj. Removed the attempts to avoid adding a slash at the end of a completed
- executable name if there was a directory with the same name in the
- current directory.
-
-kkk. Fixed PATH lookup code so it treats the permission bits separately for
- owner, group, and other, rather than checking them all.
-
-lll. Fixed the locale code to reset the parser's idea of the character class
- <blank>, which controls how it splits tokens, when the locale changes.
-
-mmm. The shell now binds its special readline functions and key bindings only
- if the user's inputrc file has not already bound them.
-
-nnn. The shell now reports on processes that dump core due to signals when
- invoked as `-c command'.
-
-2. Changes to Readline
-
-a. Fixes to avoid core dumps because of null pointer references in the
- multibyte character code.
-
-b. Fix to avoid infinite recursion caused by certain key combinations.
-
-c. Fixed a bug that caused the vi-mode `last command' to be set incorrectly.
-
-d. Readline no longer tries to read ahead more than one line of input, even
- when more is available.
-
-e. Fixed the code that adjusts the point to not mishandle null wide
- characters.
-
-f. Fixed a bug in the history expansion `g' modifier that caused it to skip
- every other match.
-
-g. Fixed a bug that caused the prompt to overwrite previous output when the
- output doesn't contain a newline and the locale supports multibyte
- characters. This same change fixes the problem of readline redisplay
- slowing down dramatically as the line gets longer in multibyte locales.
-
-h. History traversal with arrow keys in vi insertion mode causes the cursor
- to be placed at the end of the new line, like in emacs mode.
-
-i. The locale initialization code does a better job of using the right
- precedence and defaulting when checking the appropriate environment
- variables.
-
-j. Fixed the history word tokenizer to handle <( and >( better when used as
- part of bash.
-
-k. The overwrite mode code received several bug fixes to improve undo.
-
-l. Many speedups to the multibyte character redisplay code.
-
-m. The callback character reading interface should not hang waiting to read
- keyboard input.
-
-n. Fixed a bug with redoing vi-mode `s' command.
-
-o. The code that initializes the terminal tracks changes made to the terminal
- special characters with stty(1) (or equivalent), so that these changes
- are reflected in the readline bindings. New application-callable function
- to make it work: rl_tty_unset_default_bindings().
-
-p. Fixed a bug that could cause garbage to be inserted in the buffer when
- changing character case in vi mode when using a multibyte locale.
-
-q. Fixed a bug in the redisplay code that caused problems on systems
- supporting multibyte characters when moving between history lines when the
- new line has more glyphs but fewer bytes.
-
-r. Undo and redo now work better after exiting vi insertion mode.
-
-s. Make sure system calls are restarted after a SIGWINCH is received using
- SA_RESTART.
-
-t. Improvements to the code that displays possible completions when using
- multibyte characters.
-
-u. Fixed a problem when parsing nested if statements in inputrc files.
-
-v. The completer now takes multibyte characters into account when looking for
- quoted substrings on which to perform completion.
-
-w. The history search functions now perform better bounds checking on the
- history list.
-
-3. New Features in Bash
-
-a. ANSI string expansion now implements the \x{hexdigits} escape.
-
-b. There is a new loadable `strftime' builtin.
-
-c. New variable, COMP_WORDBREAKS, which controls the readline completer's
- idea of word break characters.
-
-d. The `type' builtin no longer reports on aliases unless alias expansion
- will actually be performed.
-
-e. HISTCONTROL is now a colon-separated list of values, which permits
- more extensibility and backwards compatibility.
-
-f. HISTCONTROL may now include the `erasedups' option, which causes all lines
- matching a line being added to be removed from the history list.
-
-g. `configure' has a new `--enable-multibyte' argument that permits multibyte
- character support to be disabled even on systems that support it.
-
-h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV,
- BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING,
- BASH_COMMAND
-
-i. FUNCNAME has been changed to support the debugger: it's now an array
- variable.
-
-j. for, case, select, arithmetic commands now keep line number information
- for the debugger.
-
-k. There is a new `RETURN' trap executed when a function or sourced script
- returns (not inherited child processes; inherited by command substitution
- if function tracing is enabled and the debugger is active).
-
-l. New invocation option: --debugger. Enables debugging and turns on new
- `extdebug' shell option.
-
-m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR
- traps, respectively, to be inherited by shell functions. Equivalent to
- `set -T' and `set -E' respectively. The `functrace' option also controls
- whether or not the DEBUG trap is inherited by sourced scripts.
-
-n. The DEBUG trap is run before binding the variable and running the action
- list in a `for' command, binding the selection variable and running the
- query in a `select' command, and before attempting a match in a `case'
- command.
-
-o. New `--enable-debugger' option to `configure' to compile in the debugger
- support code.
-
-p. `declare -F' now prints out extra line number and source file information
- if the `extdebug' option is set.
-
-q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes
- the next command to be skipped, and a return value of 2 while in a
- function or sourced script forces a `return'.
-
-r. New `caller' builtin to provide a call stack for the bash debugger.
-
-s. The DEBUG trap is run just before the first command in a function body is
- executed, for the debugger.
-
-t. `for', `select', and `case' command heads are printed when `set -x' is
- enabled.
-
-u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1,
- x+2,...,y}. x and y can be integers or single characters; the sequence
- may ascend or descend; the increment is always 1.
-
-v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices)
- of array.
-
-w. New `force_fignore' shopt option; if enabled, suffixes specified by
- FIGNORE cause words to be ignored when performing word completion even
- if they're the only possibilities.
-
-x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu
- style' (filename:lineno:message) format.
-
-y. New `-o bashdefault' option to complete and compgen; if set, causes the
- whole set of bash completions to be performed if the compspec doesn't
- result in a match.
-
-z. New `-o plusdirs' option to complete and compgen; if set, causes directory
- name completion to be performed and the results added to the rest of the
- possible completions.
-
-aa. `kill' is available as a builtin even when the shell is built without
- job control.
-
-bb. New HISTTIMEFORMAT variable; value is a format string to pass to
- strftime(3). If set and not null, the `history' builtin prints out
- timestamp information according to the specified format when displaying
- history entries. If set, bash tells the history library to write out
- timestamp information when the history file is written.
-
-cc. The [[ ... ]] command has a new binary `=~' operator that performs
- extended regular expression (egrep-like) matching.
-
-dd. `configure' has a new `--enable-cond-regexp' option (enabled by default)
- to enable the =~ operator and regexp matching in [[ ... ]].
-
-ee. Subexpressions matched by the =~ operator are placed in the new
- BASH_REMATCH array variable.
-
-ff. New `failglob' option that causes an expansion error when pathname
- expansion fails to produce a match.
-
-gg. New `set -o pipefail' option that causes a pipeline to return a failure
- status if any of the processes in the pipeline fail, not just the last
- one.
-
-4. New Features in Readline
-
-a. History expansion has a new `a' modifier equivalent to the `g' modifier
- for compatibility with the BSD csh.
-
-b. History expansion has a new `G' modifier equivalent to the BSD csh `g'
- modifier, which performs a substitution once per word.
-
-c. All non-incremental search operations may now undo the operation of
- replacing the current line with the history line.
-
-d. The text inserted by an `a' command in vi mode can be reinserted with
- `.'.
-
-e. New bindable variable, `show-all-if-unmodified'. If set, the readline
- completer will list possible completions immediately if there is more
- than one completion and partial completion cannot be performed.
-
-f. There is a new application-callable `free_history_entry()' function.
-
-g. History list entries now contain timestamp information; the history file
- functions know how to read and write timestamp information associated
- with each entry.
-
-h. Four new key binding functions have been added:
-
- rl_bind_key_if_unbound()
- rl_bind_key_if_unbound_in_map()
- rl_bind_keyseq_if_unbound()
- rl_bind_keyseq_if_unbound_in_map()
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-release,
-and the previous version, bash-2.05b-beta2.
-
-1. Changes to Bash
-
-a. Fixed an off-by-one error in the function that translates job
- specifications.
-
-b. Note that we're running under Emacs and disable line editing if
- $EMACS == `t'.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-beta2,
-and the previous version, bash-2.05b-beta1.
-
-1. Changes to Bash
-
-a. Fixed the /= and %= arithmetic operators to catch division by zero.
-
-b. Added putenv, setenv, unsetenv to getenv replacement for completeness.
-
-c. Fixed a bug that could cause the -O expand_aliases invocation option
- to not take effect.
-
-d. Fixed a problem with process substitution that resulted in incorrect
- behavior when the number of process substitutions in an individual
- command approached 64.
-
-2. Changes to Readline
-
-a. Fixed a problem with backward-char-search when on a system with support
- for multibyte characters when running in a locale without any multibyte
- characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-beta1,
-and the previous version, bash-2.05b-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a problem when parsing a POSIX.2 character class name while
- evaluating a bracket expression containing multibyte characters.
-
-b. Changed the help text for `bind' to make it clear that any command
- that may be placed in ~/.inputrc is a valid argument to `bind'.
-
-c. Added `help' builtin entries for `((', `[[', and arithmetic for.
-
-d. malloc updated again:
- o slightly better overflow and underflow detection by putting the
- chunk size at the beginning and end of the chunk and making
- sure they match in free/realloc
- o partial page allocated to make things page-aligned no longer
- completely wasted
- o block coalescing now enabled by default
- o splitting and coalescing enabled for 32-byte chunks, the most
- common size requested
- o fixed a problem that resulted in spurious underflow messages and
- aborts
- o bin sizes are precomputed and stored in an array rather than
- being computed at run time
- o malloc will return memory blocks back to the system if the block
- being freed is at the top of the heap and of sufficient size to
- make it worthwhile
- o malloc/free/realloc now inline memset instead of calling the
- libc function; uses Duff's device for good performance
-
-e. Check for getservent(); make the service name completion code dependent
- on its presence.
-
-f. Changed the readline callback that executes a command bound to a key
- sequence to not save the executed command on the history list and to
- save and restore the parsing state.
-
-g. Changes to lib/sh/snprintf.c: fixed some bugs in the `g' and `G'
- floating point format display; implemented the "'" flag character
- that turns on thousands' grouping; fixed behavior on systems where
- MB_CUR_MAX does not evaluate to a constant.
-
-h. The `unset' builtin no longer returns a failure status when asked to
- unset a previously-unset variable or function.
-
-i. Changes to the build system to make it easier to cross-compile bash
- for different systems.
-
-j. Added `,' to the characters that are backslash-escaped during filename
- completion, to avoid problems with complete-into-braces and RCS filenames
- containing commas.
-
-k. Some changes to the multibyte character support code to avoid many calls
- to strlen().
-
-l. Bash now correctly honors setting LANG to some value when LC_ALL does not
- already have a value.
-
-m. Fixed a bug that could cause SIGSEGV when processing nested traps with
- trap handlers.
-
-n. The `source/.' builtin now restores the positional parameters when it
- returns unless they were changed using the `set' builtin during the file's
- execution.
-
-o. Fixed a bug that caused a syntax error when a command was terminated by
- EOF.
-
-2. New Features in Bash
-
-a. There is now support for placing the long help text into separate files
- installed into ${datadir}/bash. Not enabled by default; can be turned
- on with `--enable-separate-helpfiles' option to configure.
-
-b. All builtins that take operands accept a `--' pseudo-option, except
- `echo'.
-
-c. The `echo' builtin now accepts \0xxx (zero to three octal digits following
- the `0') in addition to \xxx (one to three octal digits) for SUSv3/XPG6/
- POSIX.1-2001 compliance.
-
-3. Changes to Readline
-
-a. Fixed a small problem in _rl_insert_char with multibyte characters.
-
-b. Fixes from IBM for line wrapping problems when using multibyte characters.
-
-c. Fixed a problem which caused the display to be messed up when the last
- line of a multi-line prompt (possibly containing invisible characters)
- was longer than the screen width.
-
-d. Fixed a problem with the vi-mode `r' command that ocurred on systems with
- support for multibyte characters when running in a locale without any
- multibyte characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-alpha1,
-and the previous version, bash-2.05a-release.
-
-1. Changes to Bash
-
-a. Some changes to work around inlining differences between compilers.
-
-b. Added more prototypes for internal shell typedefs, to catch argument
- passing errors when using pointers to functions.
-
-c. The `cd' builtin now fails in posix mode when a valid directory cannot be
- constructed from a relative pathname argument and the $PWD using pathname
- canonicalization, and the -P option has not been supplied. Previously,
- the shell would attempt to use what the user typed, leading to weird
- values for $PWD and discrepancies between the value of $PWD and the
- actual working directory.
-
-d. The `cd' builtin now resets $PWD when canonicalization fails but a chdir
- to the pathname passed as an argument succeeds (when not in posix mode).
-
-e. The `fc' builtin has been fixed, as POSIX requires, to use the closest
- history position in range when given an out-of-range argument.
-
-f. The history file loading code was changed to allow lines to be saved in
- the history list from the shell startup files.
-
-g. `history -s args' now works better in compound commands.
-
-h. The tilde expansion code was fixed to better recognize when it's being
- invoked in an assignment context, which enables expansion after `='
- and `:'.
-
-i. Fixed the command name completion code so a slash is no longer appended
- to a single match if there happens to be a directory with that name in
- $PWD.
-
-j. Fixed compound array assignment to no longer perform alias expansion, to
- allow reserved words as array members, and to not produce extra output
- when the `-v' option had been enabled.
-
-k. Fixed the programmable completion code to better handle newlines in lists
- of possible completions (e.g., `complete -W').
-
-l. Removed the reserved words from the `bash-builtins' manual page.
-
-m. Parser error reporting now attempts to do a better job of identifying the
- token in error rather than doing straight textual analysis.
-
-n. Fixes for Inf/NaN, locales, wide/multibyte characters and zero-length
- arguments in the library snprintf(3) replacement.
-
-o. `read -e' no longer does command name completion on the first word on
- the line being read.
-
-p. `select' now returns failure if the read of the user's selection fails.
-
-q. Fixed a bug that could cause a core dump when setting $PIPESTATUS.
-
-r. Fixes to not allocate so many job slots when the shell is running a loop
- with job control enabled in a subshell of an interactive shell.
-
-s. Fixed a bug in the trap code that caused traps to be inherited by
- command substitutions in some cases.
-
-t. Fixed a bug that could cause alias expansion to inappropriately expand
- the word following the alias.
-
-u. Fixed a bug in the `kill' builtin that mishandled negative pid arguments.
-
-v. The parser is less lenient when parsing assignment statements where the
- characters before the `=' don't comprise a valid identifier.
-
-w. The arithmetic expression evaluation code now honors the setting of the
- `-u' option when expanding variable names.
-
-x. Fixed the arithmetic evaluation code to allow array subscripts to be
- assigned (`let b[7]=42') and auto-incremented and auto-decremented
- (e.g., b[7]++).
-
-y. Reimplemented the existing prompt string date and time expansions using
- strftime(3), which changed the output of \@ in some locales.
-
-z. Fixed a bug that could cause a core dump when a special shell variable
- (like RANDOM) was converted to an array with a variable assignment.
-
-aa. Fixed a bug that would reset the handler for a signal the user had
- trapped to a function that would exit the shell when setting the exit
- trap in a non-interactive shell.
-
-bb. Changed the execve(2) wrapper code to check whether or not a failing
- command is a directory before looking at whether a `#!' interpreter
- failed for some reason.
-
-cc. Fixed a bug in the command printing code so it no longer inserts a `;'
- after a newline, which produces a syntax error when reused as input.
-
-dd. The code that expands $PS4 no longer inherits the `-x' flag.
-
-ee. The bash-specific completion functions may now take advantage of the
- double-TAB and M-? features of the standard readline completion
- functions.
-
-ff. The mail checking code no longer prints a message if the checked file's
- size has not increased, even if the access time is less than the modification time.
-
-gg. Rewrote the variable symbol table code: there is now a stack of
- contexts, each possibly including a separate symbol table; there can
- be more than one temporary environment supplied to nested invocations
- of `./source'; the temporary environments no longer require so much
- special-case code; shell functions now handle the temporary environment
- and local variables more consistently; function scope exit is faster now
- that the entire symbol table does not have to be traversed to dispose of
- local variables; it is now easier to push vars from the temporary
- environment to the shell's variable table in posix mode; some duplicated
- code has been removed.
-
-hh. Regularized the error message printing code; builtin_error is now called
- more consistently, and common error message strings are handled by small
- functions. This should make eventual message translation easier.
-
-ii. Error messages now include the line number in a script when the shell
- is not interactive.
-
-jj. Array subscript expansion now takes place even when the array variable is
- unset, so side effects will take place.
-
-kk. Fixed a bug in the SICGHLD child-reaping code so that it won't find
- jobs already marked as terminated if the OS reuses pids quickly enough.
-
-ll. Fixed a bug that could cause a signal to not interrupt the `wait'
- builtin while it was waiting for a background process to terminate.
-
-mm. A couple of changes to make it easier for multiple shells to share history
- files using `history -n', `history -r', and `history -w'.
-
-nn. The `getopts' builtin always increments OPTIND to point to the next
- option to be handled when an option is returned, whether it's valid
- or not, as POSIX 1003.x-2001 requires.
-
-oo. Changed some parts of the expansion code to avoid allocating and
- immediately freeing memory without using the results for anything.
-
-pp. The shell now keeps track of $IFS internally, updating its internal map
- each time the variable is assigned a new value (or at local scope exit).
- This saves thousands of hash lookups for IFS, which, while individually
- cheap, add up.
-
-qq. Rewrote the hash table code: searching and insertion are much faster now,
- and it uses a better string hashing function; augmented the function
- interface to simplify other parts of the code and remove duplicated code
-
-rr. The shell now uses a simple, generic `object cache' for allocating and
- caching words and word lists, which were the major users of
- malloc/free.
-
-ss. Fixed the assignment statement parsing code to allow whitespace and
- newlines in subscripts when performing array element assignment.
-
-tt. The shell now issues many fewer calls to sigprocmask and other signal
- masking system calls.
-
-uu. Fixed the `test' and conditional command file comparison operators to
- work right when one file has a non-positive timestamp and the other
- does not exist.
-
-vv. Fixed some cases where the special characters '\001' and '\177' in the
- values of variables or positional parameters caused incorrect expansion
- results.
-
-2. Changes to Readline
-
-a. Fixed output of comment-begin character when listing variable values.
-
-b. Added some default key bindings for common escape sequences produced by
- HOME and END keys.
-
-c. Fixed the mark handling code to be more emacs-compatible.
-
-d. A bug was fixed in the code that prints possible completions to keep it
- from printing empty strings in certain circumstances.
-
-e. Change the key sequence printing code to print ESC as M\- if ESC is a
- meta-prefix character -- it's easier for users to understand than \e.
-
-f. Fixed unstifle_history() to return values that match the documentation.
-
-g. Fixed the event loop (rl_event_hook) to handle the case where the input
- file descriptor is invalidated.
-
-h. Fixed the prompt display code to work better when the application has a
- custom redisplay function.
-
-i. Changes to make reading and writing the history file a little faster, and
- to cope with huge history files without calling abort(3) from xmalloc.
-
-j. The vi-mode `S' and `s' commands are now undone correctly.
-
-3. New Features in Bash
-
-a. If set, TMOUT is the default timeout for the `read' builtin.
-
-b. `type' has two new options: `-f' suppresses shell function lookup, and
- `-P' forces a $PATH search.
-
-c. New code to handle multibyte characters.
-
-d. `select' was changed to be more ksh-compatible, in that the menu is
- reprinted each time through the loop only if REPLY is set to NULL.
- The previous behavior is available as a compile-time option.
-
-e. `complete -d' and `complete -o dirnames' now force a slash to be
- appended to names which are symlinks to directories.
-
-f. There is now a bindable edit-and-execute-command readline command,
- like the vi-mode `v' command, bound to C-xC-e in emacs mode.
-
-g. Added support for ksh93-like [:word:] character class in pattern matching.
-
-h. The $'...' quoting construct now expands \cX to Control-X.
-
-i. A new \D{...} prompt expansion; passes the `...' to strftime and inserts
- the result into the expanded prompt.
-
-j. The shell now performs arithmetic in the largest integer size the
- machine supports (intmax_t), instead of long.
-
-k. If a numeric argument is supplied to one of the bash globbing completion
- functions, a `*' is appended to the word before expansion is attempted.
-
-l. The bash globbing completion functions now allow completions to be listed
- with double tabs or if `show-all-if-ambiguous' is set.
-
-m. New `-o nospace' option for `complete' and `compgen' builtins; suppresses
- readline's appending a space to the completed word.
-
-n. New `here-string' redirection operator: <<< word.
-
-o. When displaying variables, function attributes and definitions are shown
- separately, allowing them to be re-used as input (attempting to re-use
- the old output would result in syntax errors).
-
-p. There is a new configuration option `--enable-mem-scramble', controls
- bash malloc behavior of writing garbage characters into memory at
- allocation and free time.
-
-q. The `complete' and `compgen' builtins now have a new `-s/-A service'
- option to complete on names from /etc/services.
-
-r. `read' has a new `-u fd' option to read from a specified file descriptor.
-
-s. Fix the completion code so that expansion errors in a directory name
- don't cause a longjmp back to the command loop.
-
-t. Fixed word completion inside command substitution to work a little more
- intuitively.
-
-u. The `printf' %q format specifier now uses $'...' quoting to print the
- argument if it contains non-printing characters.
-
-v. The `declare' and `typeset' builtins have a new `-t' option. When applied
- to functions, it causes the DEBUG trap to be inherited by the named
- function. Currently has no effect on variables.
-
-w. The DEBUG trap is now run *before* simple commands, ((...)) commands,
- [[...]] conditional commands, and for ((...)) loops.
-
-x. The expansion of $LINENO inside a shell function is only relative to the
- function start if the shell is interactive -- if the shell is running a
- script, $LINENO expands to the line number in the script. This is as
- POSIX-2001 requires.
-
-y. The bash debugger in examples/bashdb has been modified to work with the
- new DEBUG trap semantics, the command set has been made more gdb-like,
- and the changes to $LINENO make debugging functions work better. Code
- from Gary Vaughan.
-
-z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup
- and close).
-
-aa. There is a new `-l' invocation option, equivalent to `--login'.
-
-bb. The `hash' builtin has a new `-l' option to list contents in a reusable
- format, and a `-d' option to remove a name from the hash table.
-
-4. New Features in Readline
-
-a. Support for key `subsequences': allows, e.g., ESC and ESC-a to both
- be bound to readline functions. Now the arrow keys may be used in vi
- insert mode.
-
-b. When listing completions, and the number of lines displayed is more than
- the screen length, readline uses an internal pager to display the results.
- This is controlled by the `page-completions' variable (default on).
-
-c. New code to handle editing and displaying multibyte characters.
-
-d. The behavior introduced in bash-2.05a of deciding whether or not to
- append a slash to a completed name that is a symlink to a directory has
- been made optional, controlled by the `mark-symlinked-directories'
- variable (default is the 2.05a behavior).
-
-e. The `insert-comment' command now acts as a toggle if given a numeric
- argument: if the first characters on the line don't specify a
- comment, insert one; if they do, delete the comment text
-
-f. New application-settable completion variable:
- rl_completion_mark_symlink_dirs, allows an application's completion
- function to temporarily override the user's preference for appending
- slashes to names which are symlinks to directories.
-
-g. New function available to application completion functions:
- rl_completion_mode, to tell how the completion function was invoked
- and decide which argument to supply to rl_complete_internal (to list
- completions, etc.).
-
-h. Readline now has an overwrite mode, toggled by the `overwrite-mode'
- bindable command, which could be bound to `Insert'.
-
-i. New application-settable completion variable:
- rl_completion_suppress_append, inhibits appending of
- rl_completion_append_character to completed words.
-
-j. New key bindings when reading an incremental search string: ^W yanks
- the currently-matched word out of the current line into the search
- string; ^Y yanks the rest of the current line into the search string,
- DEL or ^H deletes characters from the search string.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-release,
-and the previous version, bash-2.05a-rc1.
-
-1. Changes to Bash
-
-a. Fixed the `printf' builtin so that the variable name supplied as an
- argument to a %n conversion must be a valid shell identifier.
-
-b. Improved the random number generator slightly.
-
-c. Changes to configuration to not put -I/usr/include into $CFLAGS, since
- it messes up some includes.
-
-d. Corrected description of POSIXLY_CORRECT in man page and info manual.
-
-e. Fixed a couple of cases of incorrect function prototypes that sneaked
- through and caused compilation problems.
-
-f. A few changes to avoid potential core dumps in the programmable completion
- code.
-
-g. Fixed a configure problem that could cause a non-existent file to show
- up in LIBOBJS.
-
-h. Fixed a configure problem that could cause siglist.o to not be built when
- required.
-
-i. Changes to the strtoimax and strtoumax replacement functions to work
- around buggy compilers.
-
-j. Fixed a problem with the snprintf replacement function that could
- potentially cause a core dump.
-
-2. Changes to Readline
-
-a. Fixed a locale-specific problem in the vi-mode `goto mark' command.
-
-b. Fixed Makefile to not put -I/usr/include into CFLAGS, since it can cause
- include file problems.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-rc1,
-and the previous version, bash-2.05a-beta1.
-
-1. Changes to Bash
-
-a. Fixed the snprintf replacement to correctly implement the `alternate form'
- of the %g and %G conversions.
-
-b. Fixed snprintf to correctly handle the optional precision with the %g and
- %G conversions.
-
-c. Fixed the arithmetic evaluation code to correct the values of `@' and `_'
- when translating base-64 constants (they were backwards).
-
-d. New library functions for formatting long and long long ints.
-
-e. Fixed a few places where negative array subscripts could have occurred,
- mostly as the result of systems using signed characters.
-
-f. Fixed a few places that assumed a pid_t was no wider than an int.
-
-g. Fixed the `maildir' mail checking code to work on systems where a
- `struct stat' doesn't include an `st_blocks' member.
-
-h. Fixed snprintf to make `unsigned long long' conversion formats (%llu)
- work better.
-
-i. Fixed snprintf to not print a sign when asked to do an unsigned conversion.
-
-j. Made configure changes to avoid compiling empty source files in lib/sh.
-
-k. New replacement functions (if necessary) for strtoull, strtoll, strtoimax,
- strtoumax.
-
-l. The `printf' builtin now handles the `ll' and `j' length modifiers
- directly, since they can affect the type and width of the argument
- passed to printf(3).
-
-m. Renamed a number of the bash-specific autoconf macros in aclocal.m4 to
- have more sytematic naming, with accompanying changes to configure.in.
-
-n. Fixed snprintf to handle long doubles and the %a/%A conversions by
- falling back to sprintf, as long as sprintf supports them.
-
-o. Fixed return value from vsnprintf/snprintf to be the number of characters
- that would have been printed, even if that number exceeds the buffer
- size passed as an argument.
-
-p. Bash no longer attempts to define its own versions of some ctype macros
- if they are implemented as functions in libc but not as macros in
- <ctype.h>.
-
-q. Changed the variable printing code (used by `set', `export', etc.) to
- not use the $'...' syntax when in posix mode, since that caused
- interoperability problems with other shells (most notably with autoconf).
- When not in posix mode, it uses $'...' if the string to be printed
- contains non-printing characters and regular single quotes otherwise.
-
-r. snprintf now recognizes the %F conversion.
-
-s. Fixed a bug that could cause the wrong status to be returned by a shell
- function when the shell is compiled without job control and a null
- command containing a command substutition was executed in the function.
-
-t. When in posix mode, the default value for MAILCHECK is 600.
-
-u. Bash only initializes FUNCNAME, GROUPS, and DIRSTACK as special variables
- if they're not in the initial environment.
-
-v. If SECONDS appears in the initial environment with a valid integer value,
- bash uses that as the starting value, as if an assignment had been
- performed.
-
-w. Bash no longer auto-exports HOME, PATH, SHELL, or TERM, even though it
- gives them default values if they don't appear in the initial environment.
-
-x. Bash no longer auto-exports HOSTNAME, HOSTTYPE, MACHTYPE, or OSTYPE,
- even if it assigns them default values.
-
-y. Bash no longer removes the export attribute from SSH_CLIENT or SSH2_CLIENT
- if they appear in the initial environment.
-
-z. Bash no longer attempts to discover if it's being run by sshd in order to
- run the startup files. If the SSH_SOURCE_BASHRC is uncommented in
- config-top.h it will attempt to do so as previously, but that's commented
- out in the distributed version.
-
-aa. Fixed a typo in the code that tests for LC_NUMERIC.
-
-bb. The POSIXLY_CORRECT shell variable and its effects are now documented.
-
-cc. Some changes to several of the support shell scripts included in the
- definitions to try to avoid race conditions and attacks.
-
-dd. Several changes to avoid warnings from `gcc -Wall'.
-
-ee. Fixed a problem with the `unset' builtin that could cause incorrect
- results if asked to unset a variable and an array subscript in the
- same command.
-
-ff. A few changes to the shell's temporary file creation code to avoid
- potential file descriptor leaks and to prefer the system's idea of
- the temporary directory to use.
-
-gg. Fixes to build with the C alloca in lib/malloc/alloca.c if the system
- requires it but the shell has been configured --without-bash-malloc.
-
-hh. Updated the documentation to note that only interactive shells resend
- SIGHUP to all jobs before exiting.
-
-ii. Fixes to only pass unquoted tilde words to tilde_expand, rather than
- rely on tilde_expand or getpwnam(3) to handle the quotes (MacOS 10.x
- will remove backslashes in any login name passed to getpwnam(3)).
-
-jj. Small change from Paul Eggert to make LINENO right in commands run with
- `bash -c'.
-
-2. New Features in Bash
-
-a. The `printf' builtin now handles the %a and %A conversions if they're
- implemented by printf(3).
-
-b. The `printf' builtin now handles the %F conversion (just about like %f).
-
-c. The `printf' builtin now handles the %n conversion like printf(3). The
- corresponding argument is the name of a shell variable to which the
- value is assigned.
-
-3. Changes to Readline
-
-a. Fixed a few places where negative array subscripts could have occurred.
-
-b. Fixed the vi-mode code to use a better method to determine the bounds of
- the array used to hold the marks.
-
-c. Fixed the defines in chardefs.h to work better when chars are signed.
-
-d. Fixed configure.in to use the new names for bash autoconf macros.
-
-e. Readline no longer attempts to define its own versions of some ctype
- macros if they are implemented as functions in libc but not as macros in
- <ctype.h>.
-
-f. Fixed a problem where rl_backward could possibly set point to before
- the beginning of the line.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-beta1,
-and the previous version, bash-2.05a-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a bug in the evalution of arithmetic `for' statements when the
- expanded expression is NULL.
-
-b. Fixed an unassigned variable problem in the redirection printing code.
-
-c. Added more prototypes to extern function declarations in the header
- files and to static function declarations in C source files.
-
-d. Make sure called functions have a prototype in scope, to get the arguments
- and return values right instead of casting. Removed extern function
- declarations from C source files that were already included in header
- files.
-
-e. Changed some function arguments to use function typedefs in general.h so
- the prototypes can be checked. The only use of Function and VFunction
- now is for unwind-protects.
-
-f. More const changes to function arguments and appropriate variables.
-
-g. Changed the mail checking support to handle `maildir'-style mail
- directories.
-
-h. Augmented the bash malloc to pass in the file and line number information
- for each malloc, realloc, and free. This should result in better error
- messages.
-
-i. The `old' gnu malloc is no longer a configuration option.
-
-j. Augmented the bash malloc with optional tracing and registering allocated
- and freed memory.
-
-k. Prompt string decoding now saves and restores the value of $? when it
- expands the prompt string, so command substitutions don't change $?.
-
-i. Array indices are now `long', since shell arithmetic is performed as long,
- and the internal arrayind_t type is used consistently.
-
-j. Some more `unsigned char *' fixes from Paul Eggert.
-
-k. Fixed a bad call to builtin_error that could cause core dumps when making
- local variables.
-
-l. `return' may no longer be used to terminate a `select' command, for
- compatibility with ksh.
-
-m. Changed code that reads octal numbers to do a better job of detecting
- overflows.
-
-n. The time formatting code no longer uses absolute indices into a buffer,
- because the buffer size changes depending on the size of a `time_t'.
-
-o. `umask' now prints four digits when printing in octal mode, for
- compatibility with other shells.
-
-p. Lots of changes to the `printf' builtin from Paul Eggert: it handles `L'
- formats and long doubles better, and internal functions have been
- simpified where appropriate.
-
-q. Some `time_t' fixes for machines were a time_t is bigger than a long.
-
-r. Replaced some bash-specific autoconf macros with standard equivalents.
-
-s. Improvmed the code that constructs temporary filenames to make the
- generated names a bit more random.
-
-t. Added code that checks for ascii before calling any of the is* ctype
- functions.
-
-u. Changed some places where a `char' was used as an array subscript to use
- `unsigned char', since a `char' can be negative if it's signed by default.
-
-v. Lots of changes to the `ulimit' builtin from Paul Eggert to add support
- for the new POSIX-200x RLIM_SAVED_CUR and RLIM_SAVED_MAX values and
- simplify the code.
-
-w. `ulimit' now prints the description of a resource in any error message
- relating to fetching or setting that resource's limits.
-
-x. The `snprintf' replacement now computes maximum values at compile
- time rather than using huge constants for things like long long.
-
-y. Interactive shells now ignore `set -n'.
-
-z. Changed the malloc bookkeeping information so that it's now 8 bytes
- instead of 12 on most 32-bit machines (saving 4 bytes per allocation),
- restoring 8-byte alignment.
-
-aa. The malloc error reporting code now attempts to print the file and line
- number of the call that caused the error.
-
-bb. Changed the redirection error reporting code to catch EBADF errors and
- report the file descriptor number rather than the file being redirected
- to or from (e.g., things like `exec 4242<x' where 4242 is an out-of-range
- file descriptor).
-
-cc. `printf', `echo -e', and the $'...' code now process only two hex digits
- after a `\x' escape sequence for compatibility with other shells, and
- the documentation was changed to note that the octal and hex escape
- sequences result in an eight-bit value rather than strict ASCII.
-
-2. Changes to Readline
-
-a. The completion code now attempts to do a better job of preserving the
- case of the word the user typed if ignoring case in completions.
-
-b. Readline defaults to not echoing the input and lets the terminal
- initialization code enable echoing if there is a controlling terminal.
-
-c. The key binding code now processes only two hex digits after a `\x'
- escape sequence, and the documentation was changed to note that the
- octal and hex escape sequences result in an eight-bit value rather
- than strict ASCII.
-
-3. New Features in Bash
-
-a. The builtin `ulimit' now takes two new non-numeric arguments: `hard',
- meaning the current hard limit, and `soft', meaning the current soft
- limit, in addition to `unlimited'
-
-b. `ulimit' now prints the option letter associated with a particular
- resource when printing more than one limit.
-
-c. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is
- one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively.
-
-4. New Features in Readline
-
-a. New bindable variable `history-preserve-point'. If set, the history
- code attempts to place the user at the same location on each history
- line retrived with previous-history or next-history.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-alpha1,
-and the previous version, bash-2.05-release.
-
-1. Changes to Bash
-
-a. Better checks in the redirection code for write errors.
-
-b. bashbug now uses $TMPDIR, defaulting to /tmp, and uses mktemp(1) more
- portably.
-
-c. System-specific configuration changes for: Interix, OpenBSD, FreeBSD,
- MacOS X.
-
-d. Some more `const' cleanups through the code.
-
-e. Fixed a typo in the /dev/fd redirection code, better checks for valid
- numeric fds in /dev/fd.
-
-f. Fixed many parts of the shell to handle integer overflow more gracefully
- and to do more stringent checks for valid numbers.
-
-g. Fixed mksignames to include config.h.
-
-h. Fixed an uninitialized variable problem that could cause the shell to core
- dump when replacing characters in a string.
-
-i. New mechanism for updating the patch level when official patches are
- released (patchlevel.h).
-
-j. configure.in changed to no longer require external files _distribution and
- _patchlevel.
-
-k. Fixed non-interactive shell initialization problem when bash started as
- `bash -i filename'.
-
-l. Fixed printf builtin conversion error handling to be POSIX.2-conformant.
-
-m. autoconf-2.52 is now used to build configure; autoconf-2.50 or newer is
- required. Some of the bash-specific macros were removed, since they are
- now standard.
-
-n. Startup files and files read with source or `.' are no longer required to
- be regular files.
-
-o. Fixed core dump in builtin printf when user-supplied precision or field
- width is 0.
-
-p. Fixed builtin printf to treat a negative field width as a positive field
- width with left-justification.
-
-r. New unwind-protect implementation from Paul Eggert.
-
-s. Fixed an inadvertently-unclosed comment in the bash completion code that
- caused programmable completions to not add trailing slashes or spaces to
- completions.
-
-t. Fixed the process substitution code to cope better when stdin is closed.
-
-v. Fixes, mostly from Paul Eggert, for a few possible buffer overflows in
- the shell.
-
-w. Fixes from Paul Eggert to avoid most of the type casts in the shell code,
- and use more appropriate types for a number of variables.
-
-x. Command substition no longer inherits the DEBUG trap.
-
-y. Some fixes to the process substition code on machines without /dev/fd so
- that named pipes are not removed inappropriately.
-
-z. The loadable `getconf' builtin is now much more complete, and will become
- part of the shell in the future.
-
-aa. The select command no longer terminates on a `return', so it can be used
- to return from an enclosing function (as ksh does it).
-
-bb. Fixed the extended pattern matching code to behave better when presented
- with incorrectly-formed patterns.
-
-cc. Some changes were made with the intent of making cross-compilation easier.
-
-dd. The network code (/dev/tcp and /dev/udp redirections) uses getaddrinfo(3)
- if it's available, which adds support for IPv6.
-
-ee. Subshells of login shells no longer source ~/.bash_logout when they exit.
-
-ff. Fixes so that subshells don't exit inappropriately if the -e option has
- been set.
-
-gg. Restricted shells no longer allow functions to be exported.
-
-hh. Changes to the pattern matching code so extended pattern matching works
- on systems with deficient shared library implementations, like MacOS X.
-
-ii. Better error messages when a script with a leading `#!interp' fails
- to execute because of problems with `interp'.
-
-jj. Fixed `compgen' to handle the `-o default' option better.
-
-kk. Fixed the job control code to force an asynchronous process's standard
- input to /dev/null only if job control is not active.
-
-ll. Fixed a possible infinite recursion problem when `fc ""=abc' (a null
- pattern) is used to re-execute a previous command.
-
-mm. Fixed `declare [-a] var=value' to assign VALUE to element 0 if VAR is an
- array variable. Similarly for `declare [-a] var[N]=value'. This is like
- ksh93.
-
-nn. Fixed a bug that caused `read -a aname' to work even if ANAME had been
- declared readonly.
-
-oo. Fixed a possible integer overflow problem when constructing names for
- temporary files.
-
-2. New Features in Bash
-
-a. Added support for DESTDIR installation root prefix, so you can do a
- `make install DESTDIR=bash-root' and do easier binary packaging.
-
-b. Added support for builtin printf "'" flag character as per latest POSIX
- drafts.
-
-c. Support for POSIX.2 printf(1) length specifiers `j', `t', and `z' (from
- ISO C99).
-
-d. New autoconf macro, RL_LIB_READLINE_VERSION, for use by other applications
- (bash doesn't use very much of what it returns).
-
-e. `set [-+]o nolog' is recognized as required by the latest POSIX drafts,
- but ignored.
-
-f. New read-only `shopt' option: login_shell. Set to non-zero value if the
- shell is a login shell.
-
-g. New `\A' prompt string escape sequence; expands to time in 24 HH:MM format.
-
-h. New `-A group/-g' option to complete and compgen; does group name
- completion.
-
-i. New `-t' option to `hash' to list hash values for each filename argument.
-
-j. New [-+]O invocation option to set and unset `shopt' options at startup.
-
-k. configure's `--with-installed-readline' option now takes an optional
- `=PATH' suffix to set the root of the tree where readline is installed
- to PATH.
-
-l. The ksh-like `ERR' trap has been added. The `ERR' trap will be run
- whenever the shell would have exited if the -e option were enabled.
- It is not inherited by shell functions.
-
-m. `readonly', `export', and `declare' now print variables which have been
- given attributes but not set by assigning a value as just a command and
- a variable name (like `export foo') when listing, as the latest POSIX
- drafts require.
-
-n. `bashbug' now requires that the subject be changed from the default.
-
-o. configure has a new `--enable-largefile' option, like other GNU utilities.
-
-p. `for' loops now allow empty word lists after `in', like the latest POSIX
- drafts require.
-
-3. Changes to Readline
-
-a. More `const' and type casting fixes.
-
-b. Changed rl_message() to use vsnprintf(3) (if available) to fix buffer
- overflow problems.
-
-c. The completion code no longer appends a `/' or ` ' to a match when
- completing a symbolic link that resolves to a directory name, unless
- the match does not add anything to the word being completed. This
- means that a tab will complete the word up to the full name, but not
- add anything, and a subsequent tab will add a slash.
-
-d. Fixed a trivial typo that made the vi-mode `dT' command not work.
-
-e. Fixed the tty code so that ^S and ^Q can be inserted with rl_quoted_insert.
-
-f. Fixed the tty code so that ^V works more than once.
-
-g. Changed the use of __P((...)) for function prototypes to PARAMS((...))
- because the use of __P in typedefs conflicted g++ and glibc.
-
-4. New Features in Readline
-
-a. Added extern declaration for rl_get_termcap to readline.h, making it a
- public function (it was always there, just not in readline.h).
-
-b. New #defines in readline.h: RL_READLINE_VERSION, currently 0x0402,
- RL_VERSION_MAJOR, currently 4, and RL_VERSION_MINOR, currently 2.
-
-c. New readline variable: rl_readline_version, mirrors RL_READLINE_VERSION.
-
-d. New bindable boolean readline variable: match-hidden-files. Controls
- completion of files beginning with a `.' (on Unix). Enabled by default.
-
-e. The history expansion code now allows any character to terminate a
- `:first-' modifier, like csh.
-
-f. The incremental search code remembers the last search string and uses
- it if ^R^R is typed without a search string.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-release,
-and the previous version, bash-2.05-beta2.
-
-1. Changes to Bash
-
-a. Make sure we note that the first line of a multi-line command was not
- saved in the history if the tests for HISTCONTROL succeed, but the
- HISTIGNORE check fails.
-
-b. Fixed a bug in the pattern matching code that caused `[' to be treated
- as a special character inside a `[...]' bracket expression.
-
-c. Fixed a bug in the pattern matching code that caused `]' to terminate
- a bracket expression even if it was the first character after the `['
- (or a leading `!' or `^').
-
-d. Made a small change to report a more user-friendly error message if
- execve(2) fails because of an error with the interpreter in a script
- with a leading `#! interpreter'.
-
-e. If the OS does not support an exec(2) magic number of `#!', make sure we
- have a non-null interpreter name before attempting to execute it.
-
-f. Fixed a bug that caused the shell process to end up in a different
- process group than the controlling terminal if a job-control shell was
- run with `exec' in the startup files.
-
-g. When started in POSIX mode, either by `bash --posix', `bash -o posix', or
- `sh', $SHELLOPTS includes `posix' and POSIXLY_CORRECT is set.
-
-h. Fixed a problem that caused the `\W' prompt string escape sequence to
- expand to nothing when $PWD was `//'.
-
-i. The `bashbug' shell script no longer uses $(...) command substitution.
-
-j. When `set' is invoked without options in POSIX mode, it no longer prints
- the names and definitions of shell functions.
-
-2. Changes to Readline
-
-a. rl_set_paren_blink_timeout() is now documented.
-
-b. Corrected history.3 man page: `$' is not in the default value of
- history_word_delimiters.
-
-c. If a hook function assigned to rl_event_hook sets rl_done to a non-zero
- value, rl_read_key() now immediately returns '\n' (which is assumed to
- be bound to accept-line).
-
-3. New Features in Bash
-
-a. The `>&word' redirection now works in POSIX mode as it does by default,
- since POSIX.2 leaves it unspecified.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-beta2,
-and the previous version, bash-2.05-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug in the arithmetic evaluation code so that a^=b is supported.
-
-b. Fixed startup so posixly_correct is retained across subshells begun to
- execute scripts without a leading `#!'.
-
-c. Fixed a bug that caused $(< file) to not work in a (...) subshell.
-
-d. Added config support for Linux running on the IBM S390.
-
-e. Fixed a bug that caused bash to get its input pointer out of sync when
- reading commands through a pipe and running a command with standard
- input redirected from a file.
-
-f. Made a change so that command completion now makes about half as many
- stat(2) calls when searching the $PATH.
-
-g. Fixed a bug that caused variable assignments preceding `return' to not
- be propagated to the shell environment in POSIX mode.
-
-h. Fixed a bug with ${parameter[:]?word} -- tilde expansion was not performed
- on `word'.
-
-i. In POSIX mode, `break' and `continue' do not complain and return success
- if called when the shell is not executing a loop.
-
-j. Fixed `bash -o posix' to work the same as `bash --posix'.
-
-k. Fixed a bug where variable assignments preceding `eval' or `source/.'
- would not show up in the environment exported to subshells run by the
- commands.
-
-l. In POSIX mode, shells started to execute command substitutions inherit
- the value of the `-e' option from their parent shell.
-
-m. In POSIX mode, aliases are expanded even in non-interactive shells.
-
-n. Changed some of the job control messages to display the text required by
- POSIX.2 when the shell is in POSIX mode.
-
-o. Fixed a bug in `test' that caused it to occasionally return incorrect
- results when non-numeric arguments were supplied to `-t'.
-
-2. Changes to Readline
-
-a. Some changes were made to avoid gcc warnings with -Wall.
-
-b. rl_get_keymap_by_name now finds keymaps case-insensitively, so
- `set keymap EMACS' works.
-
-c. The history file writing and truncation functions now return a useful
- status on error.
-
-d. Fixed a bug that could cause applications to dereference a NULL pointer
- if a NULL second argument was passed to history_expand().
-
-3. New Features in Bash
-
-a. doc/readline.3 has been moved to the readline distribution.
-
-4. New Features in Readline
-
-a. New function, rl_get_screen_size (int *rows, int *columns), returns
- readline's idea of the screen dimensions.
-
-b. The timeout in rl_gather_tyi (readline keyboard input polling function)
- is now settable via a function (rl_set_keyboard_input_timeout()).
-
-c. Renamed the max_input_history variable to history_max_entries; the old
- variable is maintained for backwards compatibility.
-
-d. The list of characters that separate words for the history tokenizer is
- now settable with a variable: history_word_delimiters. The default
- value is as before.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-beta1,
-and the previous version, bash-2.05-alpha1.
-
-1. Changes to Bash
-
-a. Changes to allow shared library and object building on the GNU Hurd.
-
-b. Fixes to the way exported functions are placed into the environment and
- cached.
-
-c. The globbing library once again respects locales when processing ranges
- in bracket expressions while doing pattern matching.
-
-d. System-specific configuration changes for: Tru 64, Interix
-
-e. Bashbug now uses /usr/bin/editor as one of the editing alternatives, and
- will use mktemp(1) or tempfile(1), if present, for temporary file creation.
-
-f. Bash no longer performs a binary file check on a script argument that's
- really a tty (like /dev/fd/0 or /dev/stdin).
-
-g. Fixed a bug in the execution of shell scripts that caused the effects of
- $BASH_ENV to be undone in some cases.
-
-h. Fixed several bugs that made `bash [-i] /dev/stdin' not work correctly.
-
-i. Several changes to the job control code to avoid some signal state
- manipulation.
-
-j. The Bash malloc no longer blocks signals as often, which should make it
- faster.
-
-k. Fixed a parsing bug that did not allow backslash to escape a single quote
- inside a $'...' construct.
-
-l. Fixed a bug that caused things like ${var:=$'value'} to be parsed
- incorrectly. This showed up in newer versions of autoconf.
-
-m. Fixed a bug in the bash-specific readline initialization that caused
- key bindings to bash-specific function names appearing in .inputrc to
- not be honored.
-
-n. Bash now sets the file descriptor it uses to save the file descriptor
- opened on a shell script to close on exec.
-
-o. Fixed a bug in the prompt string decoding that caused it to misbehave
- when presented an octal sequence of fewer than three characters.
-
-p. Fixed the `test' builtin to return an error if `[' is supplied a single
- argument that is not `]'.
-
-q. Fixed a bug that caused subshells started to run executable shell scripts
- without a leading `#!' to incorrectly inherit an argument list preceding
- a shell builtin (like such a script called from a script sourced with `.',
- where there were variable assignments preceding the `.' command)
-
-r. Fixed a bug that caused changes to variables supplied in an assignment
- statement preceding a shell builtin to not be honored (like a script
- run with `.').
-
-s. HOSTTYPE, OSTYPE, and MACHTYPE are set only if they do not have values
- when the shell is started.
-
-t. Fixed a bug that caused SIGINT to kill shell scripts after the script
- called `wait'.
-
-u. The `fc' builtin now tries to create its temporary files in the directory
- named by $TMPDIR.
-
-v. Bash no longer calls any Readline functions or uses any Readline variables
- not declared in readline.h.
-
-w. Fixed a bug that caused some substitutions involving $@ to not be split
- correctly, especially expansions of the form ${paramterOPword}.
-
-x. SSH2_CLIENT is now treated like SSH_CLIENT and not auto-exported if it
- appears in the initial environment.
-
-y. Fixed a couple of problems with shell scripts without a leading `#!'
- being executed out of shell functions that could cause core dumps if
- such a script attempted to execute `return'.
-
-z. Fixed a problem with the `-nt' and `-ot' binary operators for the
- `test/[' builtin and the `[[' conditional command that caused wrong
- return values if one of the file arguments did not exist.
-
-aa. Fixed a bug that caused non-interactive shells which had previously
- executed `shopt -s expand_aliases' to fail to expand aliases in a
- command like `(command) &'.
-
-2. Changes to Readline
-
-a. Changes to make most (but not yet all -- there is still crlf()) of the
- exported readline functions declared in readline.h have an rl_ prefix.
-
-b. More `const' changes in function arguments, mostly for completion
- functions.
-
-c. Fixed a bug in rl_forward that could cause the point to be set to before
- the beginning of the line in vi mode.
-
-d. Fixed a bug in the callback read-char interface to make it work when a
- readline function pushes some input onto the input stream with
- rl_execute_next (like the incremental search functions).
-
-e. Fixed a file descriptor leak in the history file manipulation code that
- was tripped when attempting to truncate a non-regular file (like
- /dev/null).
-
-f. Some existing variables are now documented and part of the public
- interface (declared in readline.h): rl_explict_arg, rl_numeric_arg,
- rl_editing_mode, rl_last_func.
-
-g. Renamed rltty_set_default_bindings to rl_tty_set_default_bindings and
- crlf to rl_crlf, so there are no public functions declared in readline.h
- without an `rl_' prefix. The old functions still exist for backwards
- compatibility.
-
-3. New Features in Bash
-
-a. A new loadable builtin, realpath, which canonicalizes and expands symlinks
- in pathname arguments.
-
-b. When `set' is called without options, it prints function defintions in a
- way that allows them to be reused as input. This affects `declare' and
- `declare -p' as well.
-
-4. New Features in Readline
-
-a. New application-callable function rl_set_prompt(const char *prompt):
- expands its prompt string argument and sets rl_prompt to the result.
-
-b. New application-callable function rl_set_screen_size(int rows, int cols):
- public method for applications to set readline's idea of the screen
- dimensions.
-
-c. The history example program (examples/histexamp.c) is now built as one
- of the examples.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-alpha1,
-and the previous version, bash-2.04-release.
-
-1. Changes to Bash
-
-a. A fix was made to allow newlines in compond array assignments.
-
-b. configure now checks for real-time signals with unusable values.
-
-c. Interactive shells no longer exit if a substitution fails because of an
- unset variable within a sourced file.
-
-d. Fixed a problem with incorrect matching of extended glob patterns when
- doing pattern substitution.
-
-e. `{' is now quoted by the completion code when it appears in a filename.
-
-f. Fixed an error in pattern matching that caused the matcher to not
- correctly skip the rest of a bracket expression after a character
- matched.
-
-g. Fixed a bug in the IFS word splitting code to make a non-whitespace IFS
- character preceded by IFS whitespace part of the current delimiter rather
- than generating a separate field.
-
-h. The {!prefix@} expansion now generates separate words, analogous to $@,
- when double-quoted.
-
-i. Command substitution now ignores NUL bytes in the command output, and the
- parser ignores them on input.
-
-j. A fix was made to the job control code to prevent hanging processes when
- the shell thinks background processes are running but the kernel returns
- -1/ECHILD from waitpid().
-
-k. `pwd' now prints an error message if the write fails when displaying the
- current directory.
-
-l. When in POSIX mode, the shell prints trap dispostions without a leading
- `SIG' in the signal specification.
-
-m. Fixed a parser bug that caused the current command's line count to be
- messed up by a compound array assignment.
-
-n. Fixed a bug in the unwind-protect code that caused bad behavior on machines
- where ints and pointers are not the same size.
-
-o. System-specific configure changes for: MacOS X.
-
-p. Changes for Cygwin to translate \r\n and \r to \n and to set file
- descriptors used for reading input to text mode in various places.
-
-q. Fixed a bug that caused `!' to occasionally not be honored when in
- a (...) subshell.
-
-r. Bash no longer assumes that getcwd() will return any useful error message
- in the buffer passed as an argument if the call fails.
-
-s. The `source', `.', and `fc' builtins no longer check whether a file is
- binary before reading commands from it.
-
-t. Subshells no longer turn off job control when they exit, since that
- sometimes resulted in the terminal being reset to the wrong process
- group.
-
-u. The history code no longer tries to save the second and subsequent lines
- of a multi-line command if the first line was not saved.
-
-v. The history saving code now does a better job of saving blank lines in a
- multi-line command.
-
-w. Removed a `feature' that made `ulimit' silently translate `unlimited' to
- the current hard limit, which obscured some kernel error returns.
-
-x. Fixed the grammar so that `}' is recognized as a reserved word after
- another reserved word, rather than requiring a `;' or newline. This
- means that constructs like
-
- { { echo a b c ; } }
-
- work as expected.
-
-y. Conditional commands ([[...]]) now perform tilde expansion on their
- arguments.
-
-z. Noted in the documentation that `set -a' will cause functions to be
- exported if they are defined after `set -a' is executed.
-
-aa. When an interactive login shell starts, if $PWD and $HOME refer to the
- same directory but are not the same string, $PWD is set to $HOME.
-
-bb. Fixed `printf' to handle invalid floating point numbers better.
-
-cc. Temporary files are now created with random filenames, to improve security.
-
-dd. The readline initialization code now binds the custom bash functions and
- key bindings after the readline defaults are set up.
-
-ee. Fixed the `source' builtin to no longer overwrite a shell function's
- argument list, even if the sourced file changes the positional parameters.
-
-ff. A bug fix was made in the expansion of `$*' in contexts where it should
- not be split, like assignment statements.
-
-gg. Fixed a bug in the parameter substring expansion to handle conditional
- arithmetic expressions ( exp ? val1 : val2 ) without cutting the expression
- off at the wrong `:'.
-
-hh. The `<>' redirection is no longer subject to the current setting of
- `noclobber', as POSIX.2 specifies.
-
-ii. Fixed a bug in the conditional command parsing code that caused expressions
- in parentheses to occasionally be parsed incorrectly.
-
-jj. Fixed a bug in the ((...)) arithmetic command to allow do...done or
- {...} to follow the )) without an intervening list terminator.
-
-kk. `printf' now treats `\E' the same as `\e' when performing backslash escape
- expansion for the `%b' format specifier.
-
-ll. When in POSIX mode, the shell no longer searches the current directory for
- a file to be sourced with `.' or `source' if `.' is not in $PATH.
-
-mm. Interactive comments are no longer turned off when POSIX mode is disabled.
-
-nn. The UID, EUID, HOSTNAME variables are not set if they are in the shell's
- environment when it starts up.
-
-oo. Fixed a bug in the `command' builtin so the effect of a command like
- `command exec 4<file' is as if the `command' had been omitted.
-
-pp. ${foo[@]} and ${foo[*]} now work as in ksh93 if `foo' is not an array
- variable.
-
-qq. ${#foo[X]}, where X is 0, @, or *, now work as in ksh93 if `foo' is not
- an array variable.
-
-rr. The shell's idea of an absolute pathname now takes into account a
- possible drive specification on Cygwin and other Windows systems.
-
-ss. Fixed a bug which caused incorrect parsing of some multi-character
- constructs if they were split across input lines with backslash-newline
- line continuation.
-
-tt. Fixed a bug that caused restricted shell mode to be set inappropriately
- when trying to execute a shell script without a leading `#!'.
-
-uu. Shell function definitions no longer require that the body be a group
- command ( {...} ), as POSIX.2 requires.
-
-vv. The `cd' and `pwd' builtins now process symlinks in pathnames internally
- and should require many fewer calls to getcwd().
-
-ww. Fixed a bug that caused a pipeline's process group to be set incorrectly
- if one of the pipeline elements contained a command substitution.
-
-xx. Fixed a bug that caused core dumps when expanding the value of HISTIGNORE.
-
-yy. The output of `set' is now quoted using $'...' so invisible characters are
- displayed as escape sequences.
-
-zz. Fixed the help text for `unset', since PATH and IFS may both be unset.
-
-aaa. The shell no longer puts directory names into the command hash table.
-
-bbb. Fixed a bug in `read' that caused it to occasionally free memory twice if
- it was interrupted after reading a large amount of data.
-
-ccc. Assignment statements that attempt to assign values to readonly variables
- now cause the command to return an error status.
-
-ddd. Fixed a bug that could cause incorrect output if a $(<file) construct was
- interrupted.
-
-eee. GROUPS and FUNCNAME now return an error status when assignment is
- attempted, but may be unset (in which case they lose their special
- properties). In all respects except unsetting, they are readonly.
-
-fff. The string-to-integer conversion code now ignores trailing whitespace in
- the string, even if strtol(3) does not.
-
-ggg. The tcsh magic-space function now does a better job of inserting the
- space close to where the point was before the history expansion, rather
- than just appending it.
-
-hhh. Fixed a bug which caused a file sourced from an interactive shell to
- fill up the jobs table if it ran lots of jobs.
-
-iii. Fixed a bug in the parameter pattern substitution code to avoid infinite
- recursion on zero-length matches.
-
-2. Changes to Readline
-
-a. When setting the terminal attributes on systems using `struct termio',
- readline waits for output to drain before changing the attributes.
-
-b. A fix was made to the history word tokenization code to avoid attempts to
- dereference a null pointer.
-
-c. Readline now defaults rl_terminal_name to $TERM if the calling application
- has left it unset, and tries to initialize with the resultant value.
-
-d. Instead of calling (*rl_getc_function)() directly to get input in certain
- places, readline now calls rl_read_key() consistently.
-
-e. Fixed a bug in the completion code that allowed a backslash to quote a
- single quote inside a single-quoted string.
-
-f. rl_prompt is no longer assigned directly from the argument to readline(),
- but uses memory allocated by readline. This allows constant strings to
- be passed to readline without problems arising when the prompt processing
- code wants to modify the string.
-
-g. Fixed a bug that caused non-interactive history searches to return the
- wrong line when performing multiple searches backward for the same string.
-
-h. Many variables, function arguments, and function return values are now
- declared `const' where appropriate, to improve behavior when linking with
- C++ code.
-
-i. The control character detection code now works better on systems where
- `char' is unsigned by default.
-
-j. The vi-mode numeric argument is now capped at 999999, just like emacs mode.
-
-k. The Function, CPFunction, CPPFunction, and VFunction typedefs have been
- replaced with a set of specific prototyped typedefs, though they are
- still in the readline header files for backwards compatibility.
-
-m. Nearly all of the (undocumented) internal global variables in the library
- now have an _rl_ prefix -- there were a number that did not, like
- screenheight, screenwidth, alphabetic, etc.
-
-n. The ding() convenience function has been renamed to rl_ding(), though the
- old function is still defined for backwards compatibility.
-
-o. The completion convenience functions filename_completion_function,
- username_completion_function, and completion_matches now have an rl_
- prefix, though the old names are still defined for backwards compatibility.
-
-p. The functions shared by readline and bash (linkage is satisfied from bash
- when compiling with bash, and internally otherwise) now have an sh_ prefix.
-
-q. Changed the shared library creation procedure on Linux and BSD/OS 4.x so
- that the `soname' contains only the major version number rather than the
- major and minor numbers.
-
-r. Fixed a redisplay bug that occurred when the prompt spanned more than one
- physical line and contained invisible characters.
-
-3. New Features in Bash
-
-a. Added a new `--init-file' invocation argument as a synonym for `--rcfile',
- per the new GNU coding standards.
-
-b. The /dev/tcp and /dev/udp redirections now accept service names as well as
- port numbers.
-
-c. `complete' and `compgen' now take a `-o value' option, which controls some
- of the aspects of that compspec. Valid values are:
-
- default - perform bash default completion if programmable
- completion produces no matches
- dirnames - perform directory name completion if programmable
- completion produces no matches
- filenames - tell readline that the compspec produces filenames,
- so it can do things like append slashes to
- directory names and suppress trailing spaces
-
-4. New Features in Readline
-
-a. The blink timeout for paren matching is now settable by applications.
-
-b. _rl_executing_macro has been renamed to rl_executing_macro, which means
- it's now part of the public interface.
-
-c. Readline has a new variable, rl_readline_state, which is a bitmap that
- encapsulates the current state of the library; intended for use by
- callbacks and hook functions.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-release,
-and the previous version, bash-2.04-beta5.
-
-1. Changes to Bash
-
-a. Better compile-time and configure-time checks for the necessity of
- inet_aton().
-
-b. A bug was fixed in the expansion of "${@:-}" when there are positional
- parameters.
-
-c. A typo was fixed in the output of `complete'.
-
-d. The matches generated for a word by the `-W' argument to complete and
- compgen are now matched against the word being completed, and only
- matches are returned as the result.
-
-e. Some fixes were made for systems which do not restart read(2) when a
- signal caught by bash is received.
-
-f. A bug was fixed which caused the umask to be set to 0 when an invalid
- symbolic mode mask was parsed.
-
-g. Fixed a bug that could cause a core dump if a SIGCHLD was received while
- performing an assignment statement using command substitution.
-
-h. Changed the word splitting function for programmable completion so cases
- in which the cursor is between words are handled a bit better.
-
-2. Changes to Readline
-
-a. rl_funmap_names() is now documented.
-
-3. New Features in Bash
-
-a. The LC_NUMERIC variable is now treated specially, and used to set the
- LC_NUMERIC locale category for number formatting, e.g., when `printf'
- displays floating-point numbers.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta5,
-and the previous version, bash-2.04-beta4.
-
-1. Changes to Bash
-
-a. A couple of changes were made to the Makefiles for easier building on
- non-Unix systems.
-
-b. Fixed a bug where the current prompt would be set to $PS2 at startup.
-
-c. The shell script that tests an already-installed version was changed to
- remove the directory it created its test programs in at exit.
-
-d. Several changes were made to the code that tokenizes an input line for
- the programmable completion code. Shell metacharacters will now appear
- as individual words in the word list passed to the completion functions.
- Some of the example completion shell functions were changed to understand
- redirection operators.
-
-e. A bug was fixed that, under obscure circumstances, could confuse the
- parser when a shell function was run by the programmable completion code.
-
-f. A bug was fixed in the ulimit builtin for systems not using getrlimit().
-
-g. The execution code now propagates the correct exit status back to the rest
- of the code if the return value of a subshell command was being inverted.
- Some new test cases for inverting return values with the `!' reserved
- word have been added.
-
-h. Negative exponents in the arithmetic evaluation of v**e now return an
- evaluation error.
-
-i. A bug that caused bash to check the wrong process in a pipeline for
- abnormal termination (and consequently resetting the terminal attributes)
- was fixed.
-
-j. Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was
- executed.
-
-2. Changes to Readline
-
-1. Fixed a bug in a C preprocessor define that caused the keypad control
- functions to be compiled out for all platforms except DJGPP.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta4,
-and the previous version, bash-2.04-beta3.
-
-1. Changes to Bash
-
-a. A couple of changes were made to the redirection to attempt to avoid
- race conditions and malicious file replacement.
-
-2. A change was made to the string evaluation code (used for command
- substitution, `eval', and the `.' builtin) to fix an obscure core
- dump on alpha machines.
-
-3. A bug that caused $LINENO to be wrong when executing arithmetic for
- commands was fixed.
-
-4. A couple of memory leaks in the programmable completion code were fixed.
-
-5. A bug that could cause a core dump by freeing memory twice during a call
- to `eval' if `set -u' had been enabled and an undefined variable was
- referenced was fixed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta3,
-and the previous version, bash-2.04-beta2.
-
-1. Changes to Bash
-
-a. Bash should run the appropriate startup files when invoked by ssh2.
-
-b. Fixed a bug in the parsing of conditional commands that could cause a
- core dump.
-
-c. Fixed a bug in parsing job specifications that occasionally caused
- core dumps when an out-of-range job was referenced.
-
-d. Fixed the `type' and `command' builtins to do better reporting of
- commands that are not found in $PATH or the hash table.
-
-e. Fixed a POSIX.2 compliance problem in the command builtin -- commands
- are supposed to be reported as full pathnames.
-
-f. The `echo' builtin now returns failure if a write error occurs.
-
-g. Fixed a bug which caused the locale to not be reset correctly when
- LC_ALL was unset.
-
-h. Changed description of `getopts' in man page and reference manual to make
- it clear that option characters may be characters other than letters.
-
-i. If the shell exits while in a function, make sure that any trap on EXIT
- doesn't think the function is still executing.
-
-j. Bashbug now tries harder to find a usable editor if $EDITOR is not set,
- rather than simply defaulting to `emacs'.
-
-k. Changes to the scripts that guess and canonicalize the system type, from
- the latest `automake' distribution via Debian.
-
-l. When using named pipes for process substitution, make sure the file
- descriptors opened for reading are set to non-blocking mode.
-
-m. Fixed a bug that caused termination of pipelines that are killed by a
- signal to not be reported in some cases.
-
-n. When not in literal-history mode, shell comment lines are not added to
- the history list.
-
-o. When running in POSIX.2 mode, bash no longer performs word splitting on
- the expanded value of the word supplied as the filename argument to
- redirection operators.
-
-p. The prompt string decoding code now backslash-quotes only characters that
- are special within double quotes when expanding the \w and \W escape
- sequences.
-
-q. Fixed a bug in the prompt decoding code that could cause a non-interactive
- shell to seg fault if `\u' was used in PS4 and the shell was in xtrace
- mode.
-
-r. Fixed a bug that caused function definitions to be printed with any
- redirections that should be attached to the entire function before the
- closing brace.
-
-s. Changed the tilde expansion code for Cygwin systems to avoid creating
- pathnames beginning with `//' if $HOME == `/'.
-
-t. Fixed a couple of autoconf tests to avoid creating files with fixed names
- in /tmp.
-
-u. The `trap' and `kill' builtins now know the names of the POSIX.1b real-
- time signals on systems which support them.
-
-2. Changes to Readline
-
-a. Fixed a problem with the single-quote quoting function that could cause
- buffer overflows.
-
-b. Fixed a bug that caused incorrect `stat characters' to be printed if
- the files being completed were in the root directory and visible-stats
- was enabled.
-
-3. New Features in Bash
-
-a. There is a new `rbash.1' manual page, from the Debian release.
-
-b. The `--enable-usg-echo-default' option to `configure' has been renamed to
- `--enable-xpg-echo-default'. The old option is still there for backwards
- compatibility.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta2,
-and the previous version, bash-2.04-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug that could cause pipes to be closed inappropriately in
- some obscure cases.
-
-b. Fixed a bug that caused creation of the exported environment to clobber
- the current command string if there were any exported shell functions.
-
-c. Some changes were made to reduce bash's memory usage.
-
-d. Fixed a problem with programmable completion and filenames to be
- completed containing quote characters.
-
-e. Changed the code the removes named pipes created for the <(...) and >(...)
- expansions to defer removal until after any current shell function has
- finished executing.
-
-f. Fixed a bug in `select' which caused it to not handle the `continue'
- builtin correctly.
-
-g. Autoconf tests added for cygwin32 and mingw32.
-
-2. New Features in Bash
-
-a. The `--with-bash-malloc' configure option replaces `--with-gnu-malloc'
- (which is still there for backwards compatibility).
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta1,
-and the previous version, bash-2.04-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a bug in the programmable completion code that occurred when
- trying to complete command lines containing a `;' or `@'.
-
-b. The file descriptor from which the shell is reading a script is now
- moved to a file descriptor above the user-addressible range.
-
-c. Changes to `printf' so that it can handle integers beginning with 0
- or 0x as octal and hex, respectively.
-
-d. Fixes to the programmable completion code so it handles nonsense like
- `compgen -C xyz' gracefully.
-
-e. The shell no longer modifies the signal handler for SIGPROF, allowing
- profiling again on certain systems.
-
-f. The shell checks for a new window size, if the user has requested it,
- after a process exits due to a signal.
-
-g. Fixed a bug with variables with null values in a program's temporary
- environment and the bash getenv() replacement.
-
-h. `declare' and the other builtins that take variable assignments as
- arguments now honor `set -a' and mark modified variables for export.
-
-i. Some changes were made for --dump-po-strings mode when writing strings
- with embedded newlines.
-
-j. The code that caches export strings from the initial environment now
- duplicates the string rather than just pointing into the environment.
-
-k. The filename completion quoting code now uses single quotes by default
- if the filename being completed contains newlines, since \<newline>
- has a special meaning to the parser.
-
-l. Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and
- u_int32_t, respectively to avoid conflicts on certain Unix versions.
-
-m. Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x.
-
-n. Fixed a problem with hostname-to-ip-address translation in the
- /dev/(tcp|udp)/hostname/port redirection code.
-
-o. The texinfo manual has been reorganized slightly.
-
-p. Filename generation (globbing) range comparisons in bracket expressions
- no longer use strcoll(3) even if it is available, since it has unwanted
- effects in certain locales.
-
-q. Fixed a cosmetic problem in the source that caused the shell to not
- compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was.
-
-r. Fixed a bug in the here-document code tripped when the file descriptor
- opened to the file containing the text of the here document was the
- same as a redirector specified by the user.
-
-s. Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline'
- in `time ! pipeline'.
-
-t. Fixed a bug with the `wait' builtin which manifested itself when an
- interrupt was received while the shell was waiting for asynchronous
- processes in a shell script.
-
-u. Fixed the DEBUG trap code so that it has the correct value of $?.
-
-v. Fixed a bug in the parameter pattern substitution code that could cause
- the shell to attempt to free unallocated memory if the pattern started
- with `/' and an expansion error occurs.
-
-w. Fixed a bug in the positional parameter substring code that could
- cause the shell to loop freeing freed memory.
-
-x. Fixed a bug in the positional parameter pattern substitution code so
- that it correctly handles null replacement strings with a pattern
- string prefixed with `%' or `#'.
-
-y. The shell no longer attempts to import functions from the environment if
- started with `-n'.
-
-z. Fixed a bug that caused `return' in a command substitution executed in
- a shell function to return from the function in a subshell and continue
- execution.
-
-aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell
- is restricted.
-
-bb. The wait* job control functions now behave better if called when there
- are no unwaited-for children.
-
-cc. Command substitution no longer unconditionally disables job control in
- the subshell started to run the command.
-
-dd. A bug was fixed that occasionally caused traps to mess up the parser
- state.
-
-ee. `bashbug' now honors user headers in the mail message it sends.
-
-ff. A bug was fixed that caused the `:p' history modifier to not print the
- history expansion if the `histverify' option was set.
-
-2. Changes to Readline
-
-a. Fixed a bug in the redisplay code for lines with more than 256 line
- breaks.
-
-b. A bug was fixed which caused invisible character markers to not be
- stripped from the prompt string if the terminal was in no-echo mode.
-
-c. Readline no longer tries to get the variables it needs for redisplay
- from the termcap entry if the calling application has specified its
- own redisplay function. Readline treats the terminal as `dumb' in
- this case.
-
-d. Fixes to the SIGWINCH code so that a multiple-line prompt with escape
- sequences is redrawn correctly.
-
-3. New Features in Bash
-
-a. `bashbug' now accepts `--help' and `--version' options.
-
-b. There is a new `xpg_echo' option to `shopt' that controls the behavior
- of echo with respect to backslash-escaped characters at runtime.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-alpha1,
-and the previous version, bash-2.04-devel.
-
-1. Changes to Bash
-
-a. Fixed a bug that could cause core dumps when performing substring
- expansion.
-
-b. Shared object configuration changes for: Solaris, OSF/1
-
-c. The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities
- for pathname expansion now understands GLOBIGNORE.
-
-d. The code that implements `eval' was changed to save the value of the
- current prompt, so an eval in a shell function called by the programmable
- completion code will not change the prompt to $PS2.
-
-e. Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to
- config-top.h. If this is defined, all login shells will read the
- startup files, not just interactive and non-interactive started with
- the `--login' option.
-
-f. Fixed a bug that caused the expansion code to occasionally dump core if
- IFS contained characters > 128.
-
-g. Fixed a problem with the grammar so that a newline is not required
- after the `))' in the new-style arithmetic for statement; a semicolon
- may be used as expected.
-
-h. Variable indirection may now reference the shell's special variables.
-
-i. The $'...' and $"..." constructs are now added to the history correctly
- if they contain newlines and command-oriented history is enabled.
-
-j. It is now an error to try to assign a value to a function-local copy
- of a readonly shell variable (declared with the `local' builtin).
-
-2. Changes to Readline
-
-a. The history file code now uses O_BINARY mode when reading and writing
- the history file on cygwin32.
-
-3. New Features in Bash
-
-a. A new programmable completion facility, with two new builtin commands:
- complete and compgen.
-
-b. configure has a new option, `--enable-progcomp', to compile in the
- programmable completion features (enabled by default).
-
-c. `shopt' has a new option, `progcomp', to enable and disable programmable
- completion at runtime.
-
-d. Unsetting HOSTFILE now clears the list of hostnames used for completion.
-
-4. New Features in Readline
-
-a. A new variable, rl_gnu_readline_p, always 1. The intent is that an
- application can verify whether or not it is linked with the `real'
- readline library or some substitute.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-devel,
-and the previous version, bash-2.03-release.
-
-1. Changes to Bash
-
-a. System-specific configuration and source changes for: Interix, Rhapsody
-
-b. Fixed a bug in execute_cmd.c that resulted in a compile-time error if
- JOB_CONTROL was not defined.
-
-c. An obscure race condition in the trap code was fixed.
-
-d. The string resulting from $'...' is now requoted to avoid any further
- expansion.
-
-e. The $'...' quoting syntax now allows backslash to escape a single quote,
- for ksh-93 compatibility.
-
-f. The $"..." quoting syntax now escapes backslashes and double quotes in
- the translated string when displaying them with the --dump-po-strings
- option.
-
-g. `echo -e' no longer converts \' to '.
-
-h. Fixes were made to the extended globbing code to handle embedded (...)
- patterns better.
-
-i. Some improvements were made to the code that unsets `nodelay' mode on
- the file descriptor from which bash is reading input.
-
-j. Some changes were made to the replacement termcap library for better
- operation on MS-DOS.
-
-k. Some changes were made to the tilde expansion code to handle backslash
- as a pathname separator on MS-DOS.
-
-l. The source has been reorganized a little bit -- there is now an `include'
- subdirectory, and lib/posixheaders has been removed.
-
-m. Improvements were made to the `read' builtin so that it makes many
- fewer read(2) system calls.
-
-n. The expansion of $- will include `c' and `s' when those options are
- supplied at shell invocation.
-
-o. Several improvments were made to the completion code: variable completion
- now works better when there are unterminated expansions, command
- completion understands quotes better, and completion now works in certain
- unclosed $(... constructs.
-
-p. The arithmetic expansion code was fixed to not need the value of a
- variable being assigned a value (fixes the "ss=09; let ss=10" bug).
-
-q. Some changes were made to make exported environment creation faster.
-
-r. The html documentation will be installed into $(htmldir) if that variable
- has a value when `make install' is run.
-
-s. Fixed a bug that would cause the bashrc file to be sourced inappropriately
- when bash is started by sshd.
-
-t. The SSH_CLIENT environment variable is no longer auto-exported.
-
-u. A bug that caused redirections with (...) subshells to be performed in
- the wrong order was fixed.
-
-v. A bug that occasionally caused inappropriate expansion of assignment
- statements in compound array assignments was fixed.
-
-w. The code that parses the words in a compound array assignment was
- simplified considerably and should work better now.
-
-x. Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant
- when a user attempts to retrieve the status of a terminated background
- process.
-
-y. Fixes to the `printf' builtin so that it doesn't try to expand all
- backslash escape sequences in the format string before parsing it for
- % format specifiers.
-
-2. Changes to Readline
-
-a. The history library tries to truncate the history file only if it is a
- regular file.
-
-b. A bug that caused _rl_dispatch to address negative array indices on
- systems with signed chars was fixed.
-
-c. rl-yank-nth-arg now leaves the history position the same as when it was
- called.
-
-d. Changes to the completion code to handle MS-DOS drive-letter:pathname
- filenames.
-
-e. Completion is now case-insensitive by default on MS-DOS.
-
-f. Fixes to the history file manipulation code for MS-DOS.
-
-g. Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS.
-
-h. Some fixes were made to the redisplay code for better operation on MS-DOS.
-
-i. The quoted-insert code will now insert tty special chars like ^C.
-
-j. A bug was fixed that caused the display code to reference memory before
- the start of the prompt string.
-
-k. More support for __EMX__ (OS/2).
-
-l. A bug was fixed in readline's signal handling that could cause infinite
- recursion in signal handlers.
-
-m. A bug was fixed that caused the point to be less than zero when rl_forward
- was given a very large numeric argument.
-
-n. The vi-mode code now gets characters via the application-settable value
- of rl_getc_function rather than calling rl_getc directly.
-
-3. New Features in Bash
-
-a. The history builtin has a `-d offset' option to delete the history entry
- at position `offset'.
-
-b. The prompt expansion code has two new escape sequences: \j, the number of
- active jobs; and \l, the basename of the shell's tty device name.
-
-c. The `bind' builtin has a new `-x' option to bind key sequences to shell
- commands.
-
-d. There is a new shell option, no_empty_command_completion, which, when
- enabled, disables command completion when TAB is typed on an empty line.
-
-e. The `help' builtin has a `-s' option to just print a builtin's usage
- synopsys.
-
-f. There are several new arithmetic operators: id++, id-- (variable
- post-increment/decrement), ++id, --id (variabl pre-increment/decrement),
- expr1 , expr2 (comma operator).
-
-g. There is a new ksh-93 style arithmetic for command:
- for ((expr1 ; expr2; expr3 )); do list; done
-
-h. The `read' builtin has a number of new options:
- -t timeout only wait timeout seconds for input
- -n nchars only read nchars from input instead of a full line
- -d delim read until delim rather than newline
- -s don't echo input chars as they are read
-
-i. The redirection code now handles several filenames specially:
- /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or
- not they are present in the file system.
-
-j. The redirection code now recognizes pathnames of the form
- /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket
- of the appropriate type to the specified port on the specified host.
-
-k. The ksh-93 ${!prefix*} expansion, which expands to the names of all
- shell variables whose names start with prefix, has been implemented.
-
-l. There is a new dynamic variable, FUNCNAME, which expands to the name of
- a currently-executing function. Assignments to FUNCNAME have no effect.
-
-m. The GROUPS variable is no longer readonly; assignments to it are silently
- discarded. This means it can be unset.
-
-4. New Features in Readline
-
-a. Parentheses matching is now always compiled into readline, and enabled
- or disabled when the value of the `blink-matching-paren' variable is
- changed.
-
-b. MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename.
-
-c. MS-DOS systems now use ~/_history as the default history file.
-
-d. history-search-{forward,backward} now leave the point at the end of the
- line when the string to search for is empty, like
- {reverse,forward}-search-history.
-
-e. history-search-{forward,backward} now leave the last history line found
- in the readline buffer if the second or subsequent search fails.
-
-f. New function for use by applications: rl_on_new_line_with_prompt, used
- when an application displays the prompt itself before calling readline().
-
-g. New variable for use by applications: rl_already_prompted. An application
- that displays the prompt itself before calling readline() must set this to
- a non-zero value.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-release,
-and the previous version, bash-2.03-beta2.
-
-1. Changes to Bash
-
-a. A file descriptor leak in the `fc' builtin was fixed.
-
-b. A bug was fixed in the `read' builtin that caused occasional spurious
- failures when using `read -e'.
-
-c. The version code needed to use the value of the cpp variable
- CONF_MACHTYPE rather than MACHTYPE.
-
-d. A new test was added to exercise the command printing and copying code.
-
-e. A bug was fixed that caused `time' to be recognized as a reserved word
- if it was the first pattern in a `case' statement pattern list.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-beta2,
-and the previous version, bash-2.03-beta1.
-
-1. Changes to Bash
-
-a. Slight additions to support/shobj-conf, mostly for the benefit of AIX 4.2.
-
-b. config.{guess,sub} support added for the NEC SX4.
-
-c. Changed some of the cross-compiling sections of the configure macros in
- aclocal.m4 so that configure won't abort.
-
-d. Slight changes to how the HTML versions of the bash and readline manuals
- are generated.
-
-e. Fixed conditional command printing to avoid interpreting printf `%'-escapes
- in arguments to [[.
-
-f. Don't include the bash malloc on all variants of the alpha processor.
-
-g. Changes to configure to make --enable-profiling work on Solaris 2.x.
-
-h. Fixed a bug that manifested itself when shell functions were called
- between calls to `getopts'.
-
-i. Fixed pattern substitution so that a bare `#'as a pattern causes the
- replacement string to be prefixed to the search string, and a bare
- `%' causes the replacement string to be appended to the search string.
-
-j. Fixed a bug in the command execution code that caused child processes
- to occasionally have the wrong value for $!.
-
-2. Changes to Readline
-
-a. Added code to the history library to catch history substitutions using
- `&' without a previous history substitution or search having been
- performed.
-
-3. New Features in Bash
-
-4. New Features in Readline
-
-a. New bindable variable: `isearch-terminators'.
-
-b. New bindable function: `forward-backward-delete-char' (unbound by default).
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-beta1,
-and the previous version, bash-2.03-alpha.
-
-1. Changes to Bash
-
-a. A change was made to the help text for `{...}' to make it clear that a
- semicolon is required before the closing brace.
-
-b. A fix was made to the `test' builtin so that syntax errors cause test
- to return an exit status > 1.
-
-c. Globbing is no longer performed on assignment statements that appear as
- arguments to `assignment builtins' such as `export'.
-
-d. System-specific configuration changes were made for: Rhapsody,
- AIX 4.2/gcc, BSD/OS 4.0.
-
-e. New loadable builtins: ln, unlink.
-
-f. Some fixes were made to the globbing code to handle extended glob patterns
- which immediately follow a `*'.
-
-g. A fix was made to the command printing code to ensure that redirections
- following compound commands have a space separating them from the rest
- of the command.
-
-h. The pathname canonicalization code was changed to produce fewer leading
- `//' sequences, since those are interpreted as network file system
- pathnames on some systems.
-
-i. A fix was made so that loops containing `eval' commands in commands passed
- to `bash -c' would not exit prematurely.
-
-j. Some changes were made to the job reaping code when the shell is not
- interactive, so the shell will retain exit statuses longer for examination
- by `wait'.
-
-k. A fix was made so that `jobs | command' works again.
-
-l. The erroneous compound array assignment var=((...)) is now a syntax error.
-
-m. A change was made to the dynamic loading code in `enable' to support
- Tenon's MachTen.
-
-n. A fix was made to the globbing code so that extended globbing patterns
- will correctly match `.' in a bracket expression.
-
-2. Changes to Readline
-
-a. A fix was made to the completion code in which a typo caused the wrong
- value to be passed to the function that computed the longest common
- prefix of the list of matches.
-
-b. The completion code now checks the value of rl_filename_completion_desired,
- which is set by application-supplied completion functions to indicate
- that filename completion is being performed, to decide whether or not to
- call an application-supplied `ignore completions' function.
-
-3. New Features in Bash
-
-a. A change was made to the startup file code so that any shell begun with
- the `--login' option, even non-interactive shells, will source the login
- shell startup files.
-
-4. New Features in Readline
-
-a. A new variable, rl_erase_empty_line, which, if set by an application using
- readline, will cause readline to erase, prompt and all, lines on which the
- only thing typed was a newline.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-alpha,
-and the previous version, bash-2.02.1-release.
-
-1. Changes to Bash
-
-a. System-specific configuration changes were made for: Irix 6.x, Unixware 7.
-
-b. The texi2dvi and texi2html scripts were updated to the latest versions
- from the net.
-
-c. The configure tests that determine which native type is 32 bits were
- changed to not require a compiled program.
-
-d. Fixed a bug in shell_execve that could cause memory to be freed twice
- after a failed exec.
-
-e. The `printf' test uses `diff -a' if it's available to prevent confusion
- due to the non-ascii output.
-
-f. Shared object configuration is now performed by a shell script,
- support/shobj-conf, which generates values to be substituted into
- makefiles by configure.
-
-g. Some changes were made to `ulimit' to avoid the use of RLIM_INVALID as a
- return value.
-
-h. Changes were made to `ulimit' to work around HPUX 9.x's peculiar
- handling of RLIMIT_FILESIZE.
-
-i. Some new loadable builtins were added: id, printenv, sync, whoami, push,
- mkdir. `pushd', `popd', and `dirs' can now be built as regular or
- loadable builtins from the same source file.
-
-j. Changes were made to `printf' to handle NUL bytes in the expanded format
- string.
-
-k. The various `make clean' Makefile targets now descend into lib/sh.
-
-l. The `type' builtin was changed to use the internal `getopt' so that things
- like `type -ap' work as expected.
-
-m. There is a new configuration option, --with-installed-readline, to link
- bash with a locally-installed version of readline. Only readline version
- 4.0 and later releases can support this. Shared and static libraries
- are supported. The installed include files are used.
-
-n. There is a new autoconf macro used to find which basic type is 64 bits.
-
-o. Dynamic linking and loadable builtins should now work on SCO 3.2v5*,
- AIX 4.2 with gcc, Unixware 7, and many other systems using gcc, where
- the `-shared' options works correctly.
-
-p. A bug was fixed in the bash filename completion code that caused memory to
- be freed twice if a directory name containing an unset variable was
- completed and the -u option was set.
-
-q. The prompt expansion code now quotes the `$' in the `\$' expansion so it
- is not processed by subsequent parameter expansion.
-
-r. Fixed a parsing bug that caused a single or double quote after a `$$' to
- trigger ANSI C expansion or locale translation.
-
-s. Fixed a bug in the globbing code that caused quoted filenames containing
- no globbing characters to sometimes be incorrectly expanded.
-
-t. Changes to the default prompt strings if prompt string decoding is not
- compiled into the shell.
-
-u. Added `do', `then', `else', `{', and `(' to the list of keywords that may
- precede the `time' reserved word.
-
-v. The shell may now be cross-built for BeOS as well as cygwin32.
-
-w. The conditional command execution code now treats `=' the same as `=='
- for deciding when to perform pattern matching.
-
-x. The `-e' option no longer causes the shell to exit if a command exits
- with a non-zero status while running the startup files.
-
-y. The `printf' builtin no longer dumps core if a modifier is supplied in
- the format string without a conversion character (e.g. `%h').
-
-z. Array assignments of the form a=(...) no longer show up in the history
- list.
-
-aa. The parser was fixed to obey the POSIX.2 rules for finding the closing
- `}' in a ${...} expression.
-
-bb. The history file is now opened with mode 0600 rather than 0666, so bash
- no longer relies on the user's umask being set appropriately.
-
-cc. Setting LANG no longer causes LC_ALL to be assigned a value; bash now
- relies on proper behavior from the C library.
-
-dd. Minor changes were made to allow quoted variable expansions using
- ${...} to be completed correctly if there is no closing `"'.
-
-ee. Changes were made to builtins/Makefile.in so that configuring the shell
- with `--enable-profiling' works right and builtins/mkbuiltins is
- generated.
-
-2. Changes to Readline
-
-a. The version number is now 4.0.
-
-b. There is no longer any #ifdef SHELL code in the source files.
-
-c. Some changes were made to the key binding code to fix memory leaks and
- better support Win32 systems.
-
-d. Fixed a silly typo in the paren matching code -- it's microseconds, not
- milliseconds.
-
-e. The readline library should be compilable by C++ compilers.
-
-f. The readline.h public header file now includes function prototypes for
- all readline functions, and some changes were made to fix errors in the
- source files uncovered by the use of prototypes.
-
-g. The maximum numeric argument is now clamped at 1000000.
-
-h. Fixes to rl_yank_last_arg to make it behave better.
-
-i. Fixed a bug in the display code that caused core dumps if the prompt
- string length exceeded 1024 characters.
-
-j. The menu completion code was fixed to properly insert a single completion
- if there is only one match.
-
-k. A bug was fixed that caused the display code to improperly display tabs
- after newlines.
-
-3. New Features in Bash
-
-a. New `shopt' option, `restricted_shell', indicating whether or not the
- shell was started in restricted mode, for use in startup files.
-
-b. Filename generation is now performed on the words between ( and ) in
- array assignments (which it probably should have done all along).
-
-c. OLDPWD is now auto-exported, as POSIX.2 seems to require.
-
-d. ENV and BASH_ENV are read-only variables in a restricted shell.
-
-4. New Features in Readline
-
-a. Many changes to the signal handling:
- o Readline now catches SIGQUIT and cleans up the tty before returning;
- o A new variable, rl_catch_signals, is available to application writers
- to indicate to readline whether or not it should install its own
- signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP,
- SIGTTIN, and SIGTTOU;
- o A new variable, rl_catch_sigwinch, is available to application
- writers to indicate to readline whether or not it should install its
- own signal handler for SIGWINCH, which will chain to the calling
- applications's SIGWINCH handler, if one is installed;
- o There is a new function, rl_free_line_state, for application signal
- handlers to call to free up the state associated with the current
- line after receiving a signal;
- o There is a new function, rl_cleanup_after_signal, to clean up the
- display and terminal state after receiving a signal;
- o There is a new function, rl_reset_after_signal, to reinitialize the
- terminal and display state after an application signal handler
- returns and readline continues
-
-b. There is a new function, rl_resize_terminal, to reset readline's idea of
- the screen size after a SIGWINCH.
-
-c. New public functions: rl_save_prompt and rl_restore_prompt. These were
- previously private functions with a `_' prefix.
-
-d. New function hook: rl_pre_input_hook, called just before readline starts
- reading input, after initialization.
-
-e. New function hook: rl_display_matches_hook, called when readline would
- display the list of completion matches. The new function
- rl_display_match_list is what readline uses internally, and is available
- for use by application functions called via this hook.
-
-f. New bindable function, delete-char-or-list, like tcsh.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02.1-release,
-and the previous version, bash-2.02-release.
-
-1. Changes to Bash
-
-a. A bug that caused the bash readline support to not compile unless aliases
- and csh-style history were configured into the shell was fixed.
-
-b. Fixed a bug that could cause a core dump when here documents contained
- more than 1000 characters.
-
-c. Fixed a bug that caused a CDPATH entry of "" to not be treated the same
- as the current directory when in POSIX mode.
-
-d. Fixed an alignment problem with the memory returned by the bash malloc,
- so returned memory is now 64-bit aligned.
-
-e. Fixed a bug that caused command substitutions executed within pipelines
- to put the terminal in the wrong process group.
-
-f. Fixes to support/config.sub for: alphas, SCO Open Server and Open Desktop,
- Unixware 2, and Unixware 7.
-
-g. Fixes to the pattern matching code to make it work correctly for eight-bit
- characters.
-
-h. Fixed a problem that occasionally caused the shell to display the wrong
- value for the new working directory when changing to a directory found
- in $CDPATH when in physical mode.
-
-i. Fixed a bug that caused core dumps when using conditional commands in
- shell functions.
-
-j. Fixed a bug that caused the printf builtin to loop forever if the format
- string did not consume any of the arguments.
-
-k. Fixed a bug in the parameter expansion code that caused "$@" to be
- incorrectly split if $IFS did not contain a space character.
-
-l. Fixed a bug that could cause a core dump when completing hostnames if
- the number of matching hostnames was an exact multiple of 16.
-
-m. Fixed a bug that caused the shell to fork too early when a command
- such as `%2 &' was given.
-
-2. Changes to Readline
-
-a. Fixed a problem with redisplay that showed up when the prompt string was
- longer than the screen width and the prompt contained invisible characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-release,
-and the previous version, bash-2.02-beta2.
-
-1. Changes to Bash
-
-a. A bug was fixed that caused the terminal process group to be set
- incorrectly when performing command substitution of builtins in a
- pipeline.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-beta2,
-and the previous version, bash-2.02-beta1.
-
-1. Changes to Bash
-
-a. Attempting to `wait' for stopped jobs now generates a warning message.
-
-b. Pipelines which exit due to SIGPIPE in non-interactive shells are now
- not reported if the shell is compiled -DDONT_REPORT_SIGPIPE.
-
-c. Some changes were made to builtins/psize.sh and support/bashbug.sh to
- attempt to avoid some /tmp file races and surreptitious file
- substitutions.
-
-d. Fixed a bug that caused the shell not to compile if configured with
- dparen arithmetic but without aliases.
-
-e. Fixed a bug that caused the input stream to be switched when assigning
- empty arrays with `bash -c'.
-
-f. A bug was fixed in the readline expansion glue code that caused bash to
- dump core when expanding lines with an unclosed single quote.
-
-g. A fix was made to the `cd' builtin so that using a non-empty directory
- from $CDPATH results in an absolute pathname of the new current working
- directory to be displayed after the current directory is changed.
-
-h. Fixed a bug in the variable assignment code that caused the shell to
- dump core when referencing an unset variable with `set -u' enabled in
- an assignment statement preceding a command.
-
-i. Fixed a bug in the exit trap code that caused reserved words to not be
- recognized under certain circumstances.
-
-j. Fixed a bug in the parameter pattern substitution code so that quote
- removal is performed.
-
-k. The shell should now configure correctly on Apple Rhapsody systems.
-
-l. The `kill' builtin now prints a usage message if it is not passed any
- arguments.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-beta1,
-and the previous version, bash-2.02-alpha1.
-
-1. Changes to Bash
-
-a. A few compilation bugs were fixed in the new extended globbing code.
-
-b. Executing arithmetic commands now sets the command name to `((' so
- error messages look right.
-
-c. Fixed some build problems with various configuration options.
-
-d. The `printf' builtin now aborts immediately if an illegal format
- character is encountered.
-
-e. The code that creates here-documents now behaves better if the file it's
- trying to create already exists for some reason.
-
-f. Fixed a problem with the extended globbing code that made patterns like
- `x+*' expand incorrectly.
-
-g. The prompt string expansion code no longer quotes tildes with backslashes.
-
-h. The bash getcwd() implementation in lib/sh/getcwd.c now behaves better in
- the presence of lstat(2) failures.
-
-i. Fixed a bug with strsub() that caused core dumps when executing `fc -s'.
-
-j. The mail checking code now ensures that it has a valid default mailpath.
-
-k. A bug was fixed that caused local variables to be unset inappropriately
- when sourcing a script from within another sourced script.
-
-l. A bug was fixed in the history saving code so that functions are saved
- in the history list correctly if `cmdhist' is enabled, but `lithist'
- is not.
-
-m. A bug was fixed that caused printf overflows when displaying error
- messages.
-
-n. It should be easier to build the loadble builtins in examples/loadables,
- though some manual editing of the generated Makefile is still required.
-
-o. The user's primary group is now always ${GROUPS[0]}.
-
-p. Some updates were made to support/config.guess from the GNU master copy.
-
-q. Some changes were made to the autoconf support for Solaris 2.6 large
- files.
-
-r. The `command' builtins now does the right thing when confstr(3) cannot
- find a value for _CS_PATH.
-
-s. Extended globbing expressions like `*.!(c)' are not history expanded if
- `extglob' is enabled.
-
-t. Using the `-P' option to `cd' will force the value that is assigned to
- PWD to not contain any symbolic links.
-
-2. Changes to Readline
-
-a. The code that prints completion listings now behaves better if one or
- more of the filenames contains non-printable characters.
-
-b. The time delay when showing matching parentheses is now 0.5 seconds.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-alpha1,
-and the previous version, bash-2.01.1-release.
-
-1. Changes to Bash
-
-a. OS-specific configuration changes for: BSD/OS 3.x, Minix 2.x,
- Solaris 2.6, SINIX SVR4.
-
-b. Changes were made to the generated `info' files so that `install-info'
- works correctly.
-
-c. PWD is now auto-exported.
-
-d. A fix was made to the pipeline code to make sure that the shell forks
- to execute simple commands consisting solely of assignment statements.
-
-e. Changes to the test suite for systems with 14-character filenames.
-
-f. The default sizes of some internal hash tables have been made smaller
- to reduce the shell's memory footprint.
-
-g. The `((...))' arithmetic command is now executed directly instead of
- being translated into `let "..."'.
-
-h. Fixes were made to the expansion code so that "$*", "$@", "${array[@]}",
- and "${array[@]}" expand correctly when IFS does not contain a space
- character, is unset, or is set to NULL.
-
-i. The indirect expansion code (${!var}) was changed so that the only
- valid values of `var' are variable names, positional parameters, `#',
- `@', and `*'.
-
-j. An arithmetic expression error in a $((...)) expansion now causes a
- non-interactive shell running in posix mode to exit.
-
-k. Compound array assignment now splits the words within the parentheses
- on shell metacharacters like the parser would before expansing them
- and performing the assignment. This is for compatibility with ksh-93.
-
-l. The internal shell backslash-quoting code (used in the output of `set'
- and completion) now quotes tildes if they appear at the start of the
- string or after a `=' or `:'.
-
-m. A couple of bugs with `shopt -o' were fixed.
-
-n. `bash +o' now displays the same output as `set +o' before starting an
- interactive shell.
-
-o. A bug that caused command substitution and the `eval' builtin to
- occasionally free memory twice when an error was encountered was fixed.
-
-p. The filename globbing code no longer requires read permission for a
- directory when the filename to be matched does not contain any globbing
- characters, as POSIX.2 specifies.
-
-q. A bug was fixed so that the job containing the last asynchronous
- process is not removed from the job table until a `wait' is executed
- for that process or another asynchronous process is started. This
- satisfies a POSIX.2 requirement.
-
-r. A `select' bug was fixed so that a non-numeric user response is treated
- the same as a numeric response that is out of range.
-
-s. The shell no longer parses the value of SHELLOPTS from the environment
- if it is restricted, running setuid, or running in `privileged mode'.
-
-t. Fixes were made to enable large file support on systems such as
- Solaris 2.6, where the size of a file may be larger than can be held
- in an `int'.
-
-u. The filename hashing code was fixed to not add `./' to the beginning of
- filenames which already begin with `./'.
-
-v. The configure script was changed so that the GNU termcap library is not
- compiled in if `prefer-curses' has been specified.
-
-w. HISTCONTROL and HISTIGNORE are no longer applied to the second and
- subsequent lines of a multi-line command.
-
-x. A fix was made to `disown' so that it does a better job of catching
- out-of-range jobs.
-
-y. Non-interactive shells no longer report the status of processes terminated
- due to SIGINT, even if the standard output is a terminal.
-
-z. A bug that caused the output of `jobs' to have extra carriage returns
- was fixed.
-
-aa. A bug that caused PIPESTATUS to not be set when builtins or shell
- functions were executed in the foreground was fixed.
-
-bb. Bash now attempts to detect when it is being run by sshd, and treats
- that case identically to being run by rshd.
-
-cc. A bug that caused `set -a' to export SHELLOPTS when one of the shell
- options was changed was fixed.
-
-dd. The `kill' builtin now disallows empty or missing process id arguments
- instead of treating them as identical to `0', which means the current
- process.
-
-ee. `var=value declare -x var' now behaves identically to
- `var=value export var'. Similarly for `var=value declare -r var' and
- `var=value readonly var'.
-
-ff. A few memory leaks were fixed.
-
-gg. `alias' and `unalias' now print error messages when passed an argument
- that is not an alias for printing or deletion, even when the shell is
- not interactive, as POSIX.2 specifies.
-
-hh. `alias' and `alias -p' now return a status of 0 when no aliases are
- defined, as POSIX.2 specifes.
-
-ii. `cd -' now prints the pathname of the new working directory if the shell
- is interactive.
-
-jj. A fix was made so that the code that binds $PWD now copes with getcwd()
- returning NULL.
-
-kk. `unset' now checks whether or not a function name it's trying to unset
- is a valid shell identifier only when the shell is running in posix mode.
-
-ll. A change was made to the code that generates filenames for here documents
- to make them less prone to name collisions.
-
-mm. The parser was changed so that `time' is recognized as a reserved word
- only at the beginning of a pipeline.
-
-nn. The pathname canonicalization code was changed so that `//' is converted
- into `/', but all other pathnames beginning with `//' are left alone, as
- POSIX.2 specifies.
-
-oo. The `logout' builtin will no longer exit a non-interactive non-login
- shell.
-
-2. Changes to Readline
-
-a. Fixed a problem in the readline test program rltest.c that caused a core
- dump.
-
-b. The code that handles parser directives in inputrc files now displays
- more error messages.
-
-c. The history expansion code was fixed so that the appearance of the
- history comment character at the beginning of a word inhibits history
- expansion for that word and the rest of the input line.
-
-3. New Features in Bash
-
-a. A new version of malloc, based on the older GNU malloc, that has many
- changes, is more page-based, is more conservative with memory usage,
- and does not `orphan' large blocks when they are freed.
-
-b. A new version of gmalloc, based on the old GLIBC malloc, with many
- changes and range checking included by default.
-
-c. A new implementation of fnmatch(3) that includes full POSIX.2 Basic
- Regular Expression matching, including character classes, collating
- symbols, equivalence classes, and support for case-insensitive pattern
- matching.
-
-d. ksh-88 egrep-style extended pattern matching ([@+*?!](patlist)) has been
- implemented, controlled by a new `shopt' option, `extglob'.
-
-e. There is a new ksh-like `[[' compound command, which implements
- extended `test' functionality.
-
-f. There is a new `printf' builtin, implemented according to the POSIX.2
- specification.
-
-g. There is a new feature for command substitution: $(< filename) now expands
- to the contents of `filename', with any trailing newlines removed
- (equivalent to $(cat filename)).
-
-h. There are new tilde prefixes which expand to directories from the
- directory stack.
-
-i. There is a new `**' arithmetic operator to do exponentiation.
-
-j. There are new configuration options to control how bash is linked:
- `--enable-profiling', to allow bash to be profiled with gprof, and
- `--enable-static-link', to allow bash to be linked statically.
-
-k. There is a new configuration option, `--enable-cond-command', which
- controls whether or not the `[[' command is included. It is on by
- default.
-
-l. There is a new configuration option, `--enable-extended-glob', which
- controls whether or not the ksh extended globbing feature is included.
- It is enabled by default.
-
-m. There is a new configuration #define in config.h.top that, when enabled,
- will cause all login shells to source /etc/profile and one of the user-
- specific login shell startup files, whether or not the shell is
- interactive.
-
-n. There is a new invocation option, `--dump-po-strings', to dump
- a shell script's translatable strings ($"...") in GNU `po' format.
-
-o. There is a new `shopt' option, `nocaseglob', to enable case-insensitive
- pattern matching when globbing filenames and using the `case' construct.
-
-p. There is a new `shopt' option, `huponexit', which, when enabled, causes
- the shell to send SIGHUP to all jobs when an interactive login shell
- exits.
-
-q. `bind' has a new `-u' option, which takes a readline function name as an
- argument and unbinds all key sequences bound to that function in a
- specified keymap.
-
-r. `disown' now has `-a' and `-r' options, to limit operation to all jobs
- and running jobs, respectively.
-
-s. The `shopt' `-p' option now causes output to be displayed in a reusable
- format.
-
-t. `test' has a new `-N' option, which returns true if the filename argument
- has been modified since it was last accessed.
-
-u. `umask' now has a `-p' option to print output in a reusable format.
-
-v. A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...'
- translation code. It expands to the character whose ascii code is NNN
- in hexadecimal.
-
-w. The prompt string expansion code has a new `\r' escape sequence.
-
-x. The shell may now be cross-compiled for the CYGWIN32 environment on
- a Unix machine.
-
-4. New Features in Readline
-
-a. There is now an option for `iterative' yank-last-arg handline, so a user
- can keep entering `M-.', yanking the last argument of successive history
- lines.
-
-b. New variable, `print-completions-horizontally', which causes completion
- matches to be displayed across the screen (like `ls -x') rather than up
- and down the screen (like `ls').
-
-c. New variable, `completion-ignore-case', which causes filename completion
- and matching to be performed case-insensitively.
-
-d. There is a new bindable command, `magic-space', which causes history
- expansion to be performed on the current readline buffer and a space to
- be inserted into the result.
-
-e. There is a new bindable command, `menu-complete', which enables tcsh-like
- menu completion (successive executions of menu-complete insert a single
- completion match, cycling through the list of possible completions).
-
-f. There is a new bindable command, `paste-from-clipboard', for use on Win32
- systems, to insert the text from the Win32 clipboard into the editing
- buffer.
-
-g. The key sequence translation code now understands printf-style backslash
- escape sequences, including \NNN octal escapes. These escape sequences
- may be used in key sequence definitions or macro values.
-
-h. An `$include' inputrc file parser directive has been added.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01.1-release,
-and the previous version, bash-2.01-release.
-
-1. Changes to Bash
-
-a. The select command was fixed to check the validity of the user's
- input more strenuously.
-
-b. A bug was fixed that prevented `time' from timing commands correctly
- when supplied as an argument to `bash -c'.
-
-c. A fix was made to the mail checking code to keep from adding the same
- mail file to the list of files to check multiple times when parsing
- $MAILPATH.
-
-d. Fixed an off-by-one error in the tilde expansion library.
-
-e. When using the compound array assignment syntax, the old value of
- the array is cleared before assigning the new value.
-
-f. Fixed a bug that could cause a core dump when a trap handler was reset
- to the default in the trap command associated with that signal.
-
-g. Fixed a bug in the locale code that occurred when assigning a value
- to LC_ALL.
-
-h. A change was made to the parser so that words of the form xxx=(...)
- are not considered compound assignment statements unless there are
- characters before the `='.
-
-i. A fix was made to the command tracing code to correctly quote each
- word of output.
-
-j. Some changes were made to the bash-specific autoconf tests to make them
- more portable.
-
-k. Completion of words with globbing characters now correctly quotes the
- result.
-
-l. The directory /var/spool/mail is now preferred to /usr/spool/mail when
- configure is deciding on the default mail directory.
-
-m. The brace completion code was fixed to not quote the `{' and `}'.
-
-n. Some fixes were made to make $RANDOM more random in subshells.
-
-o. System-specific changes were made to configure for: SVR4.2
-
-p. Changes were made so that completion of words containing globbing chars
- substitutes the result only if a single filename was matched.
-
-q. The window size is now recomputed after a job is stopped with SIGTSTP if
- the user has set `checkwinsize' with `shopt'.
-
-r. When doing substring expansion, out-of-range substring specifiers now
- cause nothing to be substituted rather than an expansion error.
-
-s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' --
- only `EXIT' and `DEBUG' are accepted.
-
-t. The display of trapped signals now uses the signal number if signals
- for which bash does not know the name are trapped.
-
-u. A fix was made so that `bash -r' does not turn on restricted mode until
- after the startup files are executed.
-
-v. A bug was fixed that occasionally caused a core dump when a variable
- found in the temporary environment of export/declare/readonly had a
- null value.
-
-w. A bug that occasionally caused unallocated memory to be passed to free()
- when doing arithmetic substitution was fixed.
-
-x. A bug that caused a buffer overrun when expanding a prompt string
- containing `\w' and ${#PWD} exceeded PATH_MAX was fixed.
-
-y. A problem with the completion code that occasionally caused it to
- refer to a character before the beginning of the readline line buffer
- was fixed.
-
-z. A bug was fixed so that the `read' builtin restarts reads when
- interrupted by signals other than SIGINT.
-
-aa. Fixed a bug that caused a command to be freed twice when there was
- an evaluation error in the `eval' command.
-
-2. Changes to Readline
-
-a. Added a missing `extern' to a declaration in readline.h that kept
- readline from compiling cleanly on some systems.
-
-b. The history file is now opened with mode 0600 when it is written for
- better security.
-
-c. Changes were made to the SIGWINCH handling code so that prompt redisplay
- is done better.
-
-d. ^G now interrupts incremental searches correctly.
-
-e. A bug that caused a core dump when the set of characters to be quoted
- when completing words was empty was fixed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-release,
-and the previous version, bash-2.01-beta2.
-
-1. Changes to Bash
-
-a. The `distclean' target should remove the `printenv' executable if it
- has been created.
-
-b. The test suite was changed slightly to ensure that the error messages
- are printed in English.
-
-c. A bug that caused the shell to dump core when a filename containing a
- `/' was passed to `hash' was fixed.
-
-d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1
- requires.
-
-e. A memory leak when completing commands was fixed.
-
-f. A memory leak that occurred when checking the hash table for commands
- with relative paths was fixed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-beta2,
-and the previous version, bash-2.01-beta1.
-
-1. Changes to Bash
-
-a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if
- the current (soft) limit is less than or equal to the hard limit.
-
-b. Fixed a bug that caused the bash emulation of strcasecmp to produce
- incorrect results.
-
-c. A bug that caused memory to be freed twice when a trap handler resets
- the trap more than once was fixed.
-
-d. A bug that caused machines where sizeof (pointer) > sizeof (int) to
- fail (and possibly dump core) when trying to unwind-protect a null
- pointer was fixed.
-
-e. The startup files should not be run with job control enabled. This fix
- allows SIGINT to once again interrupt startup file execution.
-
-f. Bash should not change the SIGPROF handler if it is set to something
- other than SIG_DFL.
-
-g. The completion code that provides bash-specific completions for readline
- now quotes characters that the readline code would treat as word break
- characters if they appear in a file name.
-
-h. The completion code now correctly quotes filenames containing a `!',
- even if the user attempted to use double quotes when attempting
- completion.
-
-i. A bug that caused the shell to dump core when `disown' was called without
- arguments and there was no current job was fixed.
-
-j. A construct like $((foo);bar) is now processed as a command substitution
- rather than as a bad arithmetic substitution.
-
-k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist'
- shell options when editing and re-executing a series of commands were
- fixed.
-
-l. A fix was made to the grammar -- the list of commands between `do' and
- `done' in the body of a `for' command should be treated the same as a
- while loop.
-
-2. Changes to Readline
-
-a. A couple of bugs that caused the history search functions to attempt to
- free a NULL pointer were fixed.
-
-b. If the C library provides setlocale(3), readline does not need to look
- at various environment variables to decide whether or not to go into
- eight-bit mode automatically -- just check whether the current locale
- is not `C' or `POSIX'.
-
-c. If the filename completion function finds that a directory was not closed
- by a previous (interrupted) completion, it closes the directory with
- closedir().
-
-3. New Features in Bash
-
-a. New bindable readline commands: history-and-alias-expand-line and
- alias-expand-line. The code was always in there, there was just no
- way to execute it.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-beta1,
-and the previous version, bash-2.01-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a problem that could cause file descriptors used for process
- substitution to conflict with those used explicitly in redirections.
-
-b. Made it easier to regenerate configure if the user changes configure.in.
-
-c. ${GROUPS[0]} should always be the primary group, even on systems without
- multiple groups.
-
-d. Spelling correction is no longer enabled by default.
-
-e. Fixes to quoting problems in `bashbug'.
-
-f. OS-specific configuration changes were made for: Irix 6.
-
-g. OS-specific code changes were made for: QNX.
-
-h. A more meaningful message is now printed when the file in /tmp for a
- here document cannot be created.
-
-i. Many changes to the shell's variable initialization code to speed
- non-interactive startup.
-
-j. Changes to the non-job-control code so that it does not try to open
- /dev/tty.
-
-k. The output of `set' and `export' is once again sorted, as POSIX wants.
-
-l. Fixed a problem caused by a recursive call reparsing the value of
- $SHELLOPTS.
-
-m. The tilde code no longer calls getenv() when it's compiled as part of
- the shell, which should eliminate problems on systems that cannot
- redefine getenv(), like the NeXT OS.
-
-n. Fixed a problem that caused `bash -o' or `bash +o' to not list all
- the shell options.
-
-o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit
- only if the hard limit is greater than the current (soft) limit.
-
-p. Fixed a problem that arose when building bash in a different directory
- than the source and y.tab.[ch] were remade with something other than
- bison. This came up most often on NetBSD.
-
-q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated
- an unfinished command completion (`/), which generated errors.
-
-r. The bash special tilde expansions (~-, ~+) are now attempted before
- calling the standard tilde expansion code, which should eliminate the
- problems people have been seeing with this on Solaris 2.5.1.
-
-s. Added support for <stdarg.h> to places where it was missing.
-
-t. Changed the code that reads the output of a command substitution to not
- go through stdio. This reduces the memory requirements and is faster.
-
-u. A number of changes to speed up export environment creation were made.
-
-v. A number of memory leaks were fixed as the result of running the test
- scripts through Purify.
-
-w. Fixed a bug that caused subshells forked to interpret executable
- scripts without a leading `#!' to not reinitialize the values of
- the shell options.
-
-2. Changes to Readline
-
-a. History library has less `#ifdef SHELL' code -- abstracted stuff out
- into application-specific function hooks.
-
-b. Readline no longer calls getenv() if it's compiled as part of the shell,
- which should eliminate problems on systems that cannot redefine getenv(),
- like the NeXT OS.
-
-c. Fixed translation of ESC when `untranslating' macro values.
-
-d. The region kill operation now fixes the mark if it ends up beyond the
- boundaries of the line after the region is deleted.
-
-3. New Features in Bash
-
-a. New argument for `configure': `--with-curses'. This can be used to
- override the selection of the termcap library on systems where it is
- deficient.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-alpha1,
-and the previous version, bash-2.0-release.
-
-1. Changes to Bash
-
-a. System-specific configuration changes for: FreeBSD, SunOS4, Irix,
- MachTen, QNX 4.2, Harris Night Hawk, SunOS5.
-
-b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2,
- HP-UX, AIX 4.2.
-
-c. A bug that caused the exec builtin to fail because the full pathname of
- the command could not be found was fixed.
-
-d. The code that performs output redirections is now more resistant to
- race conditions and possible security exploits.
-
-e. A bug that caused the shell to dump core when performing pattern
- substitutions on variable values was fixed.
-
-f. More hosts are now recognized by the auto-configuration mechanism
- (OpenBSD, QNX, others).
-
-g. Assignments to read-only variables that attempt to convert them to
- arrays are now errors.
-
-h. A bug that caused shell scripts using array assignments in POSIX mode
- to exit after the assignment was performed was fixed.
-
-i. The substring expansion code is now more careful about running off the
- ends of the expanded variable value.
-
-j. A bug that caused completion to fail if a backquoted command substitution
- appeared anywhere on the line was fixed.
-
-k. The `source' builtin no longer turns off history if it has been enabled
- in a non-interactive shell.
-
-l. A bug that caused the shell to crash when `disown' was given a pid
- instead of a job number was fixed.
-
-m. The `cd' spelling correction code will not try to change to `.' if no
- directory entries match a single-character argument.
-
-n. A bad variable name supplied to `declare', `export', or `readonly' no
- longer causes a non-interactive shell in POSIX mode to exit.
-
-o. Some fixes were made to the test suite to handle peculiarities of
- various Unix versions.
-
-p. The bash completion code now quotes characters that readline would
- treat as word breaks for completion but are not shell metacharacters.
-
-q. Bad options supplied at invocation now cause a usage message to be
- displayed.
-
-r. Fixes were made to the code that handles DEBUG traps so that the trap
- string is not freed inappropriately.
-
-s. Some changes were made to the bash debugger in examples/bashdb -- it
- should be closer to working now.
-
-t. A problem that caused the default filename used for mail checking to be
- wrong was fixed.
-
-u. A fix was made to the `echo' builtin so that NUL characters printed with
- `echo -e' do not cause the output to be truncated.
-
-v. A fix was made to the job control code so that the shell behaves better
- when monitor mode is enabled in a non-interactive shell.
-
-w. Bash no longer catches all of the terminating signals in a non-
- interactive shell until a trap is set on EXIT, which should result in
- quicker startup.
-
-x. A fix was made to the command timing code so that `time' can be used in
- a loop.
-
-y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as
- a nested subshell rather than strictly as an (erroneous) arithmetic
- command.
-
-z. A fix was made to the globbing code so that it correctly matches quoted
- filenames beginning with a `.'.
-
-aa. A bug in `fc' that caused some multi-line commands to not be stored as
- one command in the history when they were re-executed after editing
- (with `fc -e') was fixed.
-
-bb. The `ulimit' builtin now attempts to catch some classes of integer
- overflows.
-
-cc. The command-oriented-history code no longer attempts to add `;'
- inappropriately when a newline appears while reading a $(...) command
- substitution.
-
-dd. A bug that caused the shell to dump core when `help --' was executed
- was fixed.
-
-ee. A bug that caused the shell to crash when an unset variable appeared
- in the body of a here document after `set -u' had been executed was
- fixed.
-
-ff. Implicit input redirections from /dev/null for asynchronous commands
- are now handled better.
-
-gg. A bug that caused the shell to fail to compile when configured with
- `--disable-readline' was fixed.
-
-hh. The globbing code should now be interruptible.
-
-ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a
- stopped job and adjusts the data structures accordingly, as if `bg' had
- been executed instead.
-
-jj. A bug that caused the shell to crash when mixing calls to `getopts'
- and `shift' on the same set of positional parameters was fixed.
-
-kk. The command printing code now preserves the `-p' flag to `time'.
-
-ll. The command printing code now handles here documents better when there
- are other redirections associated with the command.
-
-mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_)
- is no longer placed into the environment of executed commands -- users
- of glibc had too many problems with it.
-
-nn. Reorganized the code that generates signames.h. The signal_names list
- is now more complete but may be slightly different (SIGABRT is favored
- over SIGIOT, for example). The preferred signal names are those
- listed in the POSIX.2 standard.
-
-oo. `bashbug' now uses a filename shorter than 14 characters for its
- temporary file, and asks for confirmation before sending the bug
- report.
-
-pp. A bug that caused TAB completion in vi editing mode to not be turned
- off when `set -o posix' was executed or back on when `set +o posix'
- was executed was fixed.
-
-qq. A bug in the brace expansion code that caused brace expansions appearing
- in new-style $(...) command substitutions to be inappropriately expanded
- was fixed.
-
-rr. A bug in the readline hook shell-expand-line that could cause memory to
- be inappropriately freed was fixed.
-
-ss. A bug that caused some arithmetic expressions containing `&&' and `||'
- to be parsed with the wrong precedence has been fixed.
-
-tt. References to unbound variables after `set -u' has been executed now
- cause the shell to exit immediately, as they should.
-
-uu. A bug that caused the shell to exit inappropriately when `set -e' had
- been executed and a command's return status was being inverted with the
- `!' reserved word was fixed.
-
-vv. A bug that could occasionally cause the shell to crash with a
- divide-by-zero error when timing a command was fixed.
-
-ww. A bug that caused parameter pattern substitution to leave stray
- backslashes in the replacement string when the expression is in
- double quotes was fixed.
-
-xx. The `break' and `continue' builtins now break out of all loops when an
- invalid count argument is supplied.
-
-yy. Fixed a bug that caused PATH to be set to the empty string if
- `command -p' is executed with PATH unset.
-
-zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix,
- as POSIX specifies.
-
-aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS
- if there were no shell options set.
-
-bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX
- mode, their output is as POSIX.2 specifies.
-
-ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually
- creates an array variable.
-
-ddd. Fixed a bug that prevented `time' from correctly timing background
- pipelines.
-
-2. Changes to Readline
-
-a. A bug that caused an extra newline to be printed when the cursor was on
- an otherwise empty line was fixed.
-
-b. An instance of memory being used after it was freed was corrected.
-
-c. The redisplay code now works when the prompt is longer than the screen
- width.
-
-d. `dump-macros' is now a bindable name, as it should have been all along.
-
-e. Non-printable characters are now expanded when displaying macros and
- their values.
-
-f. The `dump-variables' and `dump-macros' commands now output a leading
- newline if they're called as the result of a key sequence, rather
- than directly by an application.
-
-3. New Features in Bash
-
-a. There is a new builtin array variable: GROUPS, the set of groups to which
- the user belongs. This is used by the test suite.
-
-4. New Features in Readline
-
-a. If a key sequence bound to `universal-argument' is read while reading a
- numeric argument started with `universal-argument', it terminates the
- argument but is otherwise ignored. This provides a way to insert multiple
- instances of a digit string, and is how GNU emacs does it.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-release,
-and the previous version, bash-2.0-beta3.
-
-1. Changes to Bash
-
-a. Fix to the `getopts' builtin so that it does the right thing when a
- required option argument is not present.
-
-b. The completion code now updates the common prefix of matched names
- after FIGNORE processing is done, since any names that were removed
- may have changed the common prefix.
-
-c. Fixed a bug that made messages in MAILPATH entries not work correctly.
-
-d. Fixed a serious documentation error in the description of the new
- ${parameter:offset[:length]} expansion.
-
-e. Fixes to make parameter substring expansion ({$param:offset[:length]})
- work when within double quotes.
-
-f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional
- parameters.
-
-g. Corrected a misspelling of `unlimited' in the output of `ulimit'.
-
-h. Fixed a bug that caused executable scripts without a leading `#!' to
- occasionally pick up the wrong set of positional parameters.
-
-i. Linux systems now have a working `ulimit -v', using RLIMIT_AS.
-
-j. Updated config.guess so that many more machine types are recognized.
-
-k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]}
- expansion.
-
-l. If the shell is named `-su', and `-c command' is supplied, read and
- execute the login shell startup files even though the shell is not
- interactive. This is to support the `-' option to `su'.
-
-m. Fixed a bug that caused core dumps when the DEBUG trap was ignored
- with `trap "" DEBUG' and a shell function was subsequently executed.
-
-n. Fixed a bug that caused core dumps in the read builtin when IFS was
- set to the null string and the input had leading whitespace.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused a numeric argument of 1024 to be ignored when
- inserting text.
-
-b. Fixed the display code so that the numeric argument is displayed as it's
- being entered.
-
-c. Fixed the numeric argument reading code so that `M-- command' is
- equivalent to `M--1 command', as the prompt implies.
-
-3. New Features in Bash
-
-a. `ulimit' now sets both hard and soft limits and reports the soft limit
- by default (when neither -H nor -S is specified). This is compatible
- with versions of sh and ksh that implement `ulimit'.
-
-b. Integer constants have been extended to base 64.
-
-4. New Features in Readline
-
-a. The `home' and `end' keys are now bound to beginning-of-line and
- end-of-line, respectively, if the corresponding termcap capabilities
- are present.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-beta3,
-and the previous version, bash-2.0-beta2.
-
-1. Changes to Bash
-
-a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX.
-
-b. When in POSIX mode, variable assignments preceding a special builtin
- persist in the shell environment after the builtin completes.
-
-c. Changed all calls to getwd() to getcwd(). Improved check for systems
- where the libc getcwd() calls popen(), since that breaks on some
- systems when job control is being used.
-
-d. Fixed a bug that caused seg faults when executing scripts with the
- execute bit set but without a leading `#!'.
-
-e. The environment passed to executed commands is never sorted.
-
-f. A bug was fixed in the code that expands ${name[@]} to the number of
- elements in an array variable.
-
-g. A bug was fixed in the array compound assignment code ( A=( ... ) ).
-
-h. Window size changes now correctly propagate down to readline if
- the shopt `checkwinsize' option is enabled.
-
-i. A fix was made in the code that expands to the length of a variable
- value (${#var}).
-
-j. A fix was made to the command builtin so that it did not turn on the
- `no fork' flag inappropriately.
-
-k. A fix was made to make `set -n' work more reliably.
-
-l. A fix was made to the job control initialization code so that the
- terminal process group is set to the shell's process group if the
- shell changes its own process group.
-
-2. Changes to Readline
-
-a. System-specific changes for: SCO 3.2v[45].
-
-b. The behavior of the vi-mode `.' when redoing an `i' command was changed
- to insert the text previously inserted by the `i' command rather than
- simply entering insert mode.
-
-3. New features in Bash
-
-a. There is a new version of the autoload function package, in
- examples/functions/autoload.v2, that uses arrays and provides more
- functionality.
-
-b. Support for LC_COLLATE and locale-specific sorting of the results of
- pathname expansion if strcoll() is available.
-
-4. New Features in Readline
-
-a. Support for locale-specific sorting of completion possibilities if
- strcoll() is available.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-beta2,
-and the previous version, bash-2.0-beta1.
-
-1. Changes to Bash
-
-a. `pushd -' is once again equivalent to `pushd $OLDPWD'.
-
-b. OS-specific changes for: SCO 3.2v[45].
-
-c. A change was made to the fix for the recently-reported security hole
- when reading characters with octal value 255 to make it work better on
- systems with restartable system calls when not using readline.
-
-d. Some changes were made to the test suite so that it works if you
- configure bash with --enable-usg-echo-default.
-
-e. A fix was made to the parsing of conditional arithmetic expressions.
-
-f. Illegal arithmetic bases now cause an arithmetic evaluation error rather
- than being silently reset.
-
-g. Multiple arithmetic bases now cause an arithmetic evaluation error
- instead of being ignored.
-
-h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2.
-
-i. A bug that sometimes caused array indices to be evaluated twice (which
- would cause errors when they contained assignment statements) was fixed.
-
-j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning
- unsigned values and to simplify the code.
-
-k. A bug in the command-oriented-history code that caused it to sometimes
- put semicolons after right parens inappropriately was fixed.
-
-l. The values inserted into the prompt by the \w and \W escape sequences
- are now quoted to prevent further expansion.
-
-m. An interactive shell invoked as `sh' now reads and executes commands
- from the file named by $ENV when it starts up. If it's a login shell,
- it does this after reading /etc/profile and ~/.profile.
-
-n. The file named by $ENV is never read by non-interactive shells.
-
-2. Changes to Readline
-
-a. A few changes were made to hide some macros and functions that should not
- be public.
-
-b. An off-by-one error that caused seg faults in the history expansion code
- was fixed.
-
-3. New Features in Bash
-
-a. The ksh-style ((...)) arithmetic command was implemented. It is exactly
- identical to let "...". This is controlled by a new option to configure,
- `--enable-dparen-arithmetic', which is on by default.
-
-b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If
- defined to a filename, bash reads and executes commands from that file
- when a login shell exits. It's commented out by default.
-
-c. `ulimit' has a `-l' option that reports the maximum amount of data that
- may be locked into memory on 4.4BSD-based systems.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-beta1,
-and the previous version, bash-2.0-alpha4.
-
-1. Changes to Bash
-
-a. A bug that sometimes caused traps to be ignored on signals the
- shell treats specially was fixed.
-
-b. The internationalization code was changed to track the values of
- LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN
- and TEXTDOMAINDIR variables are also tracked; changes cause calls
- to textdomain() and bindtextdomain(), if available.
-
-c. A bug was fixed that sometimes caused double-quoted strings to be
- parsed incorrectly.
-
-d. Changes were made so that the siglist code compiles correctly on
- Solaris 2.5.
-
-e. Added `:' to the set of characters that cause word breaks for the
- completion code so that pathnames in assignments to $PATH can be
- completed.
-
-f. The `select' command was fixed to print $PS3 to stderr.
-
-g. Fixed an error in the manual page section describing the effect that
- setting and unsetting GLOBIGNORE has on the setting of the `dotglob'
- option.
-
-h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC
- on systems without gettimeofday() and resources.
-
-i. The getopt static variables are now initialized each time a subshell
- is started, so subshells using `getopts' work right.
-
-j. A sign-extension bug that caused a possible security hole was fixed.
-
-k. The parser now reads characters between backquotes within a double-
- quoted string as a single word, so double quotes in the backquoted
- string don't terminate the enclosing double-quoted string.
-
-l. A bug that caused `^O' to work incorrectly when typed as the first
- thing to an interactive shell was fixed.
-
-m. A rarely-exercised off-by-one error in the code that quotes variable
- values was fixed.
-
-n. Some memory and file descriptor leaks encountered when running a
- shell script that is executable but does not have a leading `#!'
- were plugged.
-
-2. Changes to Readline
-
-a. A bug that sometimes caused incorrect results when trying to read
- typeahead on systems without FIONREAD was fixed.
-
-3. New Features in Bash
-
-a. The command timing code now uses the value of the TIMEFORMAT variable
- to format and display timing statistics.
-
-b. The `time' reserved word now accepts a `-p' option to force the
- POSIX.2 output format.
-
-c. There are a couple of new and updated scripts to convert csh startup
- files to bash format.
-
-d. There is a new builtin array variable: BASH_VERSINFO. The various
- members hold the parts of the version information in BASH_VERSION,
- plus the value of MACHTYPE.
-
-4. New Features in Readline
-
-a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter
- eight-bit mode.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-alpha4,
-and the previous version, bash-2.0-alpha3.
-
-1. Changes to Bash
-
-a. There is better detection of rsh connections on Solaris 2.
-
-b. Assignments to read-only variables preceding a command name are now
- variable assignment errors. Variable assignment errors cause
- non-interactive shells running in posix mode to exit.
-
-c. The word tokenizer was rewritten to handle nested quotes and pairs
- ('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...))
- correctly. Some of the parameter expansion code was updated as a
- consequence.
-
-d. A fix was made to `test' when given three arguments so that a binary
- operator is checked for first, before checking that the first argument
- is `!'.
-
-e. 2''>/dev/null is no longer equivalent to 2>/dev/null.
-
-f. Parser error messages were regularized, and in most cases the name of
- the shell script being read by a non-interactive shell is not printed
- twice.
-
-g. A fix was made to the completion code so that it no longer removes the
- text the user typed in some cases.
-
-h. The special glibc `getopt' environment variable is no longer put into
- the environment on machines with small values of ARG_MAX.
-
-i. The expansion of ${...} now follows the POSIX.2 rules for finding the
- closing `}'.
-
-j. The shell no longer displays spurious status messages for background
- jobs in shell scripts that complete successfully when the script is
- run from a terminal.
-
-k. `shopt -o' now correctly updates $SHELLOPTS.
-
-l. A bug that caused the $PATH searching code to return a non-executable
- file even when an executable file with the same name appeared later in
- $PATH was fixed.
-
-m. The shell now does tilde expansions on unquoted `:~' in assignment
- statements when not in posix mode.
-
-n. Variable assignment errors when a command consists only of assignments
- now cause non-interactive shells to exit when in posix mode.
-
-o. If the variable in a `for' or `select' command is read-only, or not a
- legal shell identifier, a variable assignment error occurs.
-
-p. `test' now handles `-a' and `-o' as binary operators when three arguments
- are supplied, and correctly parses `( word )' as equivalent to `word'.
-
-q. `test' was fixed so that file names of the form /dev/fd/NN mean the same
- thing on all systems, even Linux.
-
-r. Fixed a bug in the globbing code that caused patterns with multiple
- consecutive `*'s to not be matched correctly.
-
-s. Fixed a bug that caused $PS2 to not be printed when an interactive shell
- not using readline is reading a here document.
-
-t. Fixed a bug that caused history expansion to be performed inappropriately
- when a single-quoted string spanned more than one line.
-
-u. `getopts' now checks that the variable name passed by the user as the
- second argument is a legal shell identifier and that the variable is
- not read-only.
-
-v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it
- encounters an error.
-
-w. Fixed `set' to display variable values in a form that can be re-read.
-
-x. Fixed a bug in the code that keeps track of whether or not local variables
- have been declared at the current level of function nesting.
-
-y. Non-interactive shells in posix mode now exit if the name in a function
- declaration is not a legal identifier.
-
-z. The job control code now ignores stopped children when the shell is not
- interactive.
-
-aa. The `cd' builtin no longer attempts spelling correction on the directory
- name if the shell is not interactive, regardless of the setting of the
- `cdspell' option.
-
-bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2.
-
-cc. `time' now prints its output to stderr, as POSIX.2 specifies.
-
-2. Fixes to Readline
-
-a. After printing possible completions, all lines of a multi-line prompt
- are redisplayed.
-
-b. Some changes were made to the terminal handling code in rltty.c to
- work around AIX 4.2 bugs.
-
-3. New Features in Bash
-
-a. There is a new loadable builtin: sprintf, with calling syntax
- sprintf var format [args]
- This provides an easy way to simulate ksh left- and right-justified
- variable values.
-
-b. The expansions of \h and \H in prompt strings were swapped. \h now
- expands to the hostname up to the first `.', as in bash-1.14.
-
-4. New Features in Readline
-
-a. The bash-1.14 behavior when ^M is typed while doing an incremental
- search was restored. ^J may now be used to terminate the search without
- accepting the line.
-
-b. There is a new bindable variable: disable-completion. This inhibits
- word completion and causes the completion character to be inserted as
- if it had been bound to self-insert.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-alpha3,
-and the previous version, bash-2.0-alpha2.
-
-There is now a file `COMPAT' included in the distribution that lists the
-user-visible incompatibilities between 1.14 and 2.0.
-
-1. Changes to Bash
-
-a. Some work was done so that word splitting of the rhs of assignment
- statements conforms more closely to historical practice.
-
-b. A couple of errant memory frees were fixed.
-
-c. A fix was made to the test builtin so it recognizes `<' and `>' as
- binary operators.
-
-d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's
- allocated and freed. This is to catch callers that refer to freed
- memory or assume something about newly-allocated memory.
-
-e. Fixed a problem with conversion to 12-hour time in the prompt
- expansion code.
-
-f. Fixed a problem with configure's argument parsing order. Now you can
- correctly turn on specific options after using --enable-minimal-config.
-
-g. The configure script now automatically disables the use of GNU malloc
- on systems where it's appropriate (better than having people read the
- NOTES file and do it manually).
-
-h. There are new prompt expansions (\v and \V) to insert version information
- into the prompt strings.
-
-i. The default prompt string now includes the version number.
-
-j. Most of the builtins that take no options were changed to use the
- internal getopt so they can produce proper error messages for -?
- and incorrect options.
-
-k. Some system-specific changes were made for SVR4.2 and Solaris 2.5.
-
-l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of
- MAXNAMLEN.
-
-m. A couple of problems caused by uninitialized variables were fixed.
-
-n. There are a number of new loadable builtin examples: logname, basename,
- dirname, tty, pathchk, tee, head, and rmdir. All of these conform to
- POSIX.2.
-
-o. Bash now notices changes in TZ and calls tzset() if present, so
- changing TZ will alter the time printed by prompt expansions.
-
-p. The source was reorganized a bit so I don't have to wait so long for
- some files to compile, and to facilitate the creation of a `shell
- library' at some future point.
-
-q. Bash no longer turns off job control if called as `sh', since the
- POSIX.2 spec includes job control as a standard feature.
-
-r. `bash -o posix' now works as intended.
-
-s. Fixed a problem with the completion code: when completing a filename
- that contained globbing characters, if show-all-if-ambiguous was set,
- the completion code would remove the user's text.
-
-t. Fixed ulimit so that (hopefully) the full range of limits is available
- on HPUX systems.
-
-u. A new `shopt' option (`hostcomplete') enables and disables hostname
- completion.
-
-v. The shell no longer attempts to save the history on an abort(),
- which is usually called by programming_error().
-
-w. The `-s' option to `fc' was changed to echo the command to be executed
- to stderr instead of stdout.
-
-x. If the editor invoked by `fc -e' exits with a non-zero status, no
- commands are executed.
-
-y. Fixed a bug that made the shopt `histverify' option work incorrectly.
-
-z. There is a new variable `MACHTYPE' whose value is the GNU-style
- `cpu-company-system' system description as set by configure. (The
- values of MACHTYPE and HOSTTYPE should really be swapped.)
-
-aa. The `ulimit' builtin now allows the maximum virtual memory size to be
- set via setrlimit(2) if RLIMIT_VMEM is defined.
-
-bb. `bash -nc 'command'' no longer runs `command'.
-
-2. Changes to Readline
-
-a. Fixed a typo in the code that checked for FIONREAD in input.c.
-
-b. Fixed a bug in the code that outputs keybindings, so things like C-\
- are quoted properly.
-
-c. Fixed a bug in the inputrc file parsing code to handle the problems
- caused by inputrc files created from the output of `bind -p' in
- previous versions of bash. The problem was due to the bug fixed
- in item b above.
-
-d. Readline no longer turns off the terminal's meta key, and turns it on
- once the first time it's called.
-
-------------------------------------------------------------------------------
-This file documents the changes between this version, bash-2.0-alpha2,
-and the previous version, bash-2.0-alpha.
-
-1. Changes to Bash
-
-a. The shell no longer thinks directories are executable.
-
-b. `disown' has a new option, `h', which inhibits the resending of SIGHUP
- but does not remove the job from the jobs table.
-
-c. The varargs functions in error.c now use ANSI-C `stdarg' if available.
-
-d. The build process now treats the `build version' in .build as local to
- the build directory, so different versions built from the same source
- tree have different `build versions'.
-
-e. Some problems with the grammar have been fixed. (It used `list' in a few
- productions where `compound_list' was needed. A `list' must be terminated
- with a newline or semicolon; a `compound_list' need not be.)
-
-f. A fix was made to keep `wait' from hanging when waiting for all background
- jobs.
-
-g. `bash --help' now writes its output to stdout, like the GNU Coding Standards
- specify, and includes the machine type (the value of MACHTYPE).
-
-h. `bash --version' now prints more information and exits successfully, like
- the GNU Coding Standards specify.
-
-i. The output of `time' and `times' now prints fractional seconds with three
- places after the decimal point.
-
-j. A bug that caused process substitutions to screw up the pipeline printed
- by `jobs' was fixed.
-
-k. Fixes were made to the code that implements $'...' and $"..." so they
- work as documented.
-
-l. The process substitution code now opens named pipes for reading with
- O_NONBLOCK to avoid hanging.
-
-m. Fixes were made to the trap code so the shell cleans up correctly if the
- trap command contains a `return' and we're executing a function or
- sourcing a script with `.'.
-
-n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the
- documentation (ps, dvi, etc.) on a `make install'.
-
-o. Fixed an auto-increment error that caused bash -c args to sometimes dump
- core.
-
-p. Fixed a bug that caused $HISTIGNORE to fail when the history line
- contained globbing characters.
-
-2. Changes to Readline
-
-a. There is a new string variable, rl_library_version, available for use by
- applications. The current value is "2.1".
-
-b. A bug encountered when expand-tilde was enabled and file completion was
- attempted on a word beginning with `~/' was fixed.
-
-c. A slight change was made to the incremental search termination behavior.
- ESC still terminates the search, but if input is pending or arrives
- within 0.1 seconds (on systems with select(2)), it is used as a prefix
- character. This is intented to allow users to terminate searches with
- the arrow keys and get the behavior they expect.
projects / thirdparty / bash.git / commitdiff
