pkgsrc/shells/bash/PLIST, branch trunk

bash: update to 5.2.

2022-10-03T12:50:27Z

This is a terse description of the new features added to bash-5.2 since the release of bash-5.1. As always, the manual page (doc/bash.1) is the place to look for complete descriptions. 1. New Features in Bash a. The bash malloc returns memory that is aligned on 16-byte boundaries. b. There is a new internal timer framework used for read builtin timeouts. c. Rewrote the command substitution parsing code to call the parser recursively and rebuild the command string from the parsed command. This allows better syntax checking and catches errors much earlier. Along with this, if command substitution parsing completes with here-documents remaining to be read, the shell prints a warning message and reads the here-document bodies from the current input stream. d. The `ulimit' builtin now treats an operand remaining after all of the options and arguments are parsed as an argument to the last command specified by an option. This is for POSIX compatibility. e. Here-document parsing now handles $'...' and $"..." quoting when reading the here-document body. f. The `shell-expand-line' and `history-and-alias-expand-line' bindable readline commands now understand $'...' and $"..." quoting. g. There is a new `spell-correct-word' bindable readline command to perform spelling correction on the current word. h. The `unset' builtin now attempts to treat arguments as array subscripts without parsing or expanding the subscript, even when `assoc_expand_once' is not set. i. There is a default value for $BASH_LOADABLES_PATH in config-top.h. j. Associative array assignment and certain instances of referencing (e.g., `test -v' now allow `@' and `*' to be used as keys. k. Bash attempts to expand indexed array subscripts only once when executing shell constructs and word expansions. l. The `unset' builtin allows a subscript of `@' or `*' to unset a key with that value for associative arrays instead of unsetting the entire array (which you can still do with `unset arrayname'). For indexed arrays, it removes all elements of the array without unsetting it (like `A=()'). m. Additional builtins (printf/test/read/wait) do a better job of not parsing array subscripts if array_expand_once is set. n. New READLINE_ARGUMENT variable set to numeric argument for readline commands defined using `bind -x'. o. The new `varredir_close' shell option causes bash to automatically close file descriptors opened with {var}&WORD- redirection has WORD expand to the empty string, treat the redirection as [N]<&- or [N]>&- and close file descriptor N (default 0). w. Invalid parameter transformation operators are now invalid word expansions, and so cause fatal errors in non-interactive shells. x. New shell option: patsub_replacement. When enabled, a `&' in the replacement string of the pattern substitution expansion is replaced by the portion of the string that matched the pattern. Backslash will escape the `&' and insert a literal `&'. y. `command -p' no longer looks in the hash table for the specified command. z. The new `--enable-translatable-strings' option to `configure' allows $"..." support to be compiled in or out. aa. The new `globskipdots' shell option forces pathname expansion never to return `.' or `..' unless explicitly matched. It is enabled by default. bb. Array references using `@' and `*' that are the value of nameref variables (declare -n ref='v[@]' ; echo $ref) no longer cause the shell to exit if set -u is enabled and the array (v) is unset. cc. There is a new bindable readline command name: `vi-edit-and-execute-command'. dd. In posix mode, the `printf' builtin checks for the `L' length modifier and uses long double for floating point conversion specifiers if it's present, double otherwise. ee. The `globbing' completion code now takes the `globstar' option into account. ff. `suspend -f' now forces the shell to suspend even if job control is not currently enabled. gg. Since there is no `declare -' equivalent of `local -', make sure to use `local -' in the output of `local -p'.

bash: update to 5.1.4.

2021-01-04T10:39:23Z

That is, 5.1 with the four post-release patches available so far. This is a terse description of the new features added to bash-5.1 since the release of bash-5.0. As always, the manual page (doc/bash.1) is the place to look for complete descriptions. 1. New Features in Bash a. `bind -x' now supports different bindings for different editing modes and keymaps. b. Bash attempts to optimize the number of times it forks when executing commands in subshells and from `bash -c'. c. Here documents and here strings now use pipes for the expanded document if it's smaller than the pipe buffer size, reverting to temporary files if it's larger. d. There are new loadable builtins: mktemp, accept, mkfifo, csv, cut/lcut e. In posix mode, `trap -p' now displays signals whose disposition is SIG_DFL and those that were SIG_IGN when the shell starts. f. The shell now expands the history number (e.g., in PS1) even if it is not currently saving commands to the history list. g. `read -e' may now be used with arbitrary file descriptors (`read -u N'). h. The `select' builtin now runs traps if its internal call to the read builtin is interrupted by a signal. i. SRANDOM: a new variable that expands to a 32-bit random number that is not produced by an LCRNG, and uses getrandom/getentropy, falling back to /dev/urandom or arc4random if available. There is a fallback generator if none of these are available. j. shell-transpose-words: a new bindable readline command that uses the same definition of word as shell-forward-word, etc. k. The shell now adds default bindings for shell-forward-word, shell-backward-word, shell-transpose-words, and shell-kill-word. l. Bash now allows ARGV0 appearing in the initial shell environment to set $0. m. If `unset' is executed without option arguments, bash tries to unset a shell function if a name argument cannot be a shell variable name because it's not an identifier. n. The `test -N' operator uses nanosecond timestamp granularity if it's available. o. Bash posix mode now treats assignment statements preceding shell function definitions the same as in its default mode, since POSIX has changed and no longer requires those assignments to persist after the function returns (POSIX interp 654). p. BASH_REMATCH is no longer readonly. q. wait: has a new -p VARNAME option, which stores the PID returned by `wait -n' or `wait' without arguments. r. Sorting the results of pathname expansion now uses byte-by-byte comparisons if two strings collate equally to impose a total order; the result of a POSIX interpretation. s. Bash now allows SIGINT trap handlers to execute recursively. t. Bash now saves and restores state around setting and unsetting posix mode, instead of having unsetting posix mode set a known state. u. Process substitution is now available in posix mode. v. READLINE_MARK: a new variable available while executing commands bound with `bind -x', contains the value of the mark. w. Bash removes SIGCHLD from the set of blocked signals if it's blocked at shell startup. x. `test -v N' can now test whether or not positional parameter N is set. y. `local' now honors the `-p' option to display all local variables at the current context. z. The `@a' variable transformation now prints attributes for unset array variables. aa. The `@A' variable transformation now prints a declare command that sets a variable's attributes if the variable has attributes but is unset. bb. `declare' and `local' now have a -I option that inherits attributes and value from a variable with the same name at a previous scope. cc. When run from a -c command, `jobs' now reports the status of completed jobs. dd. New `U', `u', and `L' parameter transformations to convert to uppercase, convert first character to uppercase, and convert to lowercase, respectively. ee. PROMPT_COMMAND: can now be an array variable, each element of which can contain a command to be executed like a string PROMPT_COMMAND variable. ff. `ulimit' has a -R option to report and set the RLIMIT_RTTIME resource. gg. Associative arrays may be assigned using a list of key-value pairs within a compound assignment. Compound assignments where the words are not of the form [key]=value are assumed to be key-value assignments. A missing or empty key is an error; a missing value is treated as NULL. Assignments may not mix the two forms. hh. New `K' parameter transformation to display associative arrays as key- value pairs. ii. Writing history to syslog now handles messages longer than the syslog max length by writing multiple messages with a sequence number. jj. SECONDS and RANDOM may now be assigned using arithmetic expressions, since they are nominally integer variables. LINENO is not an integer variable. kk. Bash temporarily suppresses the verbose option when running the DEBUG trap while running a command from the `fc' builtin. ll. `wait -n' now accepts a list of job specifications as arguments and will wait for the first one in the list to change state. mm. The associative array implementation can now dynamically increase the size of the hash table based on insertion patterns. nn. HISTFILE is now readonly in a restricted shell. oo. The bash malloc now returns memory that is 16-byte aligned on 64-bit systems. pp. If the hash builtin is listing hashed filenames portably, don't print anything if the table is empty. qq. GLOBIGNORE now ignores `.' and `..' as a terminal pathname component. rr. Bash attempts to optimize away forks in the last command in a function body under appropriate circumstances. ss. The globbing code now uses fnmatch(3) to check collation elements (if available) even in cases without multibyte characters. tt. The `fg' and `bg' builtins now return an error in a command substitution when asked to restart a job inherited from the parent shell. uu. The shell now attempts to unlink all FIFOs on exit, whether a consuming process has finished with them or not. vv. There is a new contributed loadable builtin: asort. 2. New Features in Readline a. If a second consecutive completion attempt produces matches where the first did not, treat it as a new completion attempt and insert a match as appropriate. b. Bracketed paste mode works in more places: incremental search strings, vi overstrike mode, character search, and reading numeric arguments. c. Readline automatically switches to horizontal scrolling if the terminal has only one line. d. Unbinding all key sequences bound to a particular readline function now descends into keymaps for multi-key sequences. e. rl-clear-display: new bindable command that clears the screen and, if possible, the scrollback buffer (bound to emacs mode M-C-l by default). f. New active mark and face feature: when enabled, it will highlight the text inserted by a bracketed paste (the `active region') and the text found by incremental and non-incremental history searches. This is tied to bracketed paste and can be disabled by turning off bracketed paste. g. Readline sets the mark in several additional commands. h. Bracketed paste mode is enabled by default. i. Readline tries to take advantage of the more regular structure of UTF-8 characters to identify the beginning and end of characters when moving through the line buffer. j. The bindable operate-and-get-next command (and its default bindings) are now part of readline instead of a bash-specific addition. k. The signal cleanup code now blocks SIGINT while processing after a SIGINT.

bash: make nls support optional

2019-10-24T11:52:30Z

pkgsrc changes: - remove broken static option - add nls option (disable by default) - change LOCALBASE to PREFIX (appease pkglint)

Update to 5.0

2019-01-08T16:24:42Z

Changelog: This is a terse description of the new features added to bash-5.0 since the release of bash-4.4. As always, the manual page (doc/bash.1) is the place to look for complete descriptions. 1. New Features in Bash a. The `wait' builtin can now wait for the last process substitution created. b. There is an EPOCHSECONDS variable, which expands to the time in seconds since the Unix epoch. c. There is an EPOCHREALTIME variable, which expands to the time in seconds since the Unix epoch with microsecond granularity. d. New loadable builtins: rm, stat, fdflags. e. BASH_ARGV0: a new variable that expands to $0 and sets $0 on assignment. f. When supplied a numeric argument, the shell-expand-line bindable readline command does not perform quote removal and suppresses command and process substitution. g. `history -d' understands negative arguments: negative arguments offset from the end of the history list. h. The `name' argument to the `coproc' reserved word now undergoes word expansion, so unique coprocs can be created in loops. i. A nameref name resolution loop in a function now resolves to a variable by that name in the global scope. j. The `wait' builtin now has a `-f' option, which signfies to wait until the specified job or process terminates, instead of waiting until it changes state. k. There is a define in config-top.h that allows the shell to use a static value for $PATH, overriding whatever is in the environment at startup, for use by the restricted shell. l. Process substitution does not inherit the `v' option, like command substitution. m. If a non-interactive shell with job control enabled detects that a foreground job died due to SIGINT, it acts as if it received the SIGINT. n. The SIGCHLD trap is run once for each exiting child process even if job control is not enabled when the shell is in Posix mode. o. A new shopt option: localvar_inherit; if set, a local variable inherits the value of a variable with the same name at the nearest preceding scope. p. `bind -r' now checks whether a key sequence is bound before binding it to NULL, to avoid creating keymaps for a multi-key sequence. q. A numeric argument to the line editing `operate-and-get-next' command specifies which history entry to use. r. The positional parameters are now assigned before running the shell startup files, so startup files can use $@. s. There is a compile-time option that forces the shell to disable the check for an inherited OLDPWD being a directory. t. The `history' builtin can now delete ranges of history entries using `-d start-end'. u. The `vi-edit-and-execute-command' bindable readline command now puts readline back in vi insertion mode after executing commands from the edited file. v. The command completion code now matches aliases and shell function names case-insensitively if the readline completion-ignore-case variable is set. w. There is a new `assoc_expand_once' shell option that attempts to expand associative array subscripts only once. x. The shell only sets up BASH_ARGV and BASH_ARGC at startup if extended debugging mode is active. The old behavior of unconditionally setting them is available as part of the shell compatibility options. y. The `umask' builtin now allows modes and masks greater than octal 777. z. The `times' builtin now honors the current locale when printing a decimal point. aa. There is a new (disabled by default, undocumented) shell option to enable and disable sending history to syslog at runtime. bb. Bash no longer allows variable assignments preceding a special builtin that changes variable attributes to propagate back to the calling environment unless the compatibility level is 44 or lower. cc. You can set the default value for $HISTSIZE at build time in config-top.h. dd. The `complete' builtin now accepts a -I option that applies the completion to the initial word on the line. ee. The internal bash malloc now uses mmap (if available) to satisfy requests greater than 128K bytes, so free can use mfree to return the pages to the kernel. ff. The shell doesn't automatically set BASH_ARGC and BASH_ARGV at startup unless it's in debugging mode, as the documentation has always said, but will dynamically create them if a script references them at the top level without having enabled debugging mode. gg. The localvar_inherit option will not attempt to inherit a value from a variable of an incompatible type (indexed vs. associative arrays, for example). hh. The `globasciiranges' option is now enabled by default; it can be set to off by default at configuration time. ii. Associative and indexed arrays now allow subscripts consisting solely of whitespace. jj. `checkwinsize' is now enabled by default. kk. The `localvar_unset' shopt option is now visible and documented. ll. The `progcomp_alias' shopt option is now visible and documented. mm. The signal name processing code now understands `SIGRTMIN+n' all the way up to SIGRTMAX. nn. There is a new `seq' loadable builtin. oo. Trap execution now honors the (internal) max invocations of `eval', since traps are supposed to be executed as if using `eval'. pp. The $_ variable doesn't change when the shell executes a command that forks. qq. The `kill' builtin now supports -sSIGNAME and -nSIGNUM, even though conforming applications aren't supposed to use them. rr. POSIX mode now enables the `shift_verbose' option. 2. New Features in Readline a. Non-incremental vi-mode search (`N', `n') can search for a shell pattern, as Posix specifies (uses fnmatch(3) if available). b. There are new `next-screen-line' and `previous-screen-line' bindable commands, which move the cursor to the same column in the next, or previous, physical line, respectively. c. There are default key bindings for control-arrow-key key combinations. d. A negative argument (-N) to `quoted-insert' means to insert the next N characters using quoted-insert. e. New public function: rl_check_signals(), which allows applications to respond to signals that readline catches while waiting for input using a custom read function. f. There is new support for conditionally testing the readline version in an inputrc file, with a full set of arithmetic comparison operators available. g. There is a simple variable comparison facility available for use within an inputrc file. Allowable operators are equality and inequality; string variables may be compared to a value; boolean variables must be compared to either `on' or `off'; variable names are separated from the operator by whitespace. h. The history expansion library now understands command and process substitution and extended globbing and allows them to appear anywhere in a word. i. The history library has a new variable that allows applications to set the initial quoting state, so quoting state can be inherited from a previous line. j. Readline now allows application-defined keymap names; there is a new public function, rl_set_keymap_name(), to do that. k. The "Insert" keypad key, if available, now puts readline into overwrite mode.

Updated bash to 4.4.

2016-09-19T09:06:03Z

This is a terse description of the new features added to bash-4.4 since the release of bash-4.3. As always, the manual page (doc/bash.1) is the place to look for complete descriptions. 1. New Features in Bash a. There is now a settable configuration #define that will cause the shell to exit if the shell is running setuid without the -p option and setuid to the real uid fails. b. Command and process substitutions now turn off the `-v' option when executing, as other shells seem to do. c. The default value for the `checkhash' shell option may now be set at compile time with a #define. d. The `mapfile' builtin now has a -d option to use an arbitrary character as the record delimiter, and a -t option to strip the delimiter as supplied with -d. e. The maximum number of nested recursive calls to `eval' is now settable in config-top.h; the default is no limit. f. The `-p' option to declare and similar builtins will display attributes for named variables even when those variables have not been assigned values (which are technically unset). g. The maximum number of nested recursive calls to `source' is now settable in config-top.h; the default is no limit. h. All builtin commands recognize the `--help' option and print a usage summary. i. Bash does not allow function names containing `/' and `=' to be exported. j. The `ulimit' builtin has new -k (kqueues) and -P (pseudoterminals) options. k. The shell now allows `time ; othercommand' to time null commands. l. There is a new `--enable-function-import' configuration option to allow importing shell functions from the environment; import is enabled by default. m. `printf -v var ""' will now set `var' to the empty string, as if `var=""' had been executed. n. GLOBIGNORE, the pattern substitution word expansion, and programmable completion match filtering now honor the value of the `nocasematch' option. o. There is a new ${parameter@spec} family of operators to transform the value of `parameter'. p. Bash no longer attempts to perform compound assignment if a variable on the rhs of an assignment statement argument to `declare' has the form of a compound assignment (e.g., w='(word)' ; declare foo=$w); compound assignments are accepted if the variable was already declared as an array, but with a warning. q. The declare builtin no longer displays array variables using the compound assignment syntax with quotes; that will generate warnings when re-used as input, and isn't necessary. r. Executing the rhs of && and || will no longer cause the shell to fork if it's not necessary. s. The `local' builtin takes a new argument: `-', which will cause it to save and the single-letter shell options and restore their previous values at function return. t. `complete' and `compgen' have a new `-o nosort' option, which forces readline to not sort the completion matches. u. Bash now allows waiting for the most recent process substitution, since it appears as $!. v. The `unset' builtin now unsets a scalar variable if it is subscripted with a `0', analogous to the ${var[0]} expansion. w. `set -i' is no longer valid, as in other shells. x. BASH_SUBSHELL is now updated for process substitution and group commands in pipelines, and is available with the same value when running any exit trap. y. Bash now checks $INSIDE_EMACS as well as $EMACS when deciding whether or not bash is being run in a GNU Emacs shell window. z. Bash now treats SIGINT received when running a non-builtin command in a loop the way it has traditionally treated running a builtin command: running any trap handler and breaking out of the loop. aa. New variable: EXECIGNORE; a colon-separate list of patterns that will cause matching filenames to be ignored when searching for commands. bb. Aliases whose value ends in a shell metacharacter now expand in a way to allow them to be `pasted' to the next token, which can potentially change the meaning of a command (e.g., turning `&' into `&&'). cc. `make install' now installs the example loadable builtins and a set of bash headers to use when developing new loadable builtins. dd. `enable -f' now attempts to call functions named BUILTIN_builtin_load when loading BUILTIN, and BUILTIN_builtin_unload when deleting it. This allows loadable builtins to run initialization and cleanup code. ee. There is a new BASH_LOADABLES_PATH variable containing a list of directories where the `enable -f' command looks for shared objects containing loadable builtins. ff. The `complete_fullquote' option to `shopt' changes filename completion to quote all shell metacharacters in filenames and directory names. gg. The `kill' builtin now has a `-L' option, equivalent to `-l', for compatibility with Linux standalone versions of kill. hh. BASH_COMPAT and FUNCNEST can be inherited and set from the shell's initial environment. ii. inherit_errexit: a new `shopt' option that, when set, causes command substitutions to inherit the -e option. By default, those subshells disable -e. It's enabled as part of turning on posix mode. jj. New prompt string: PS0. Expanded and displayed by interactive shells after reading a complete command but before executing it. kk. Interactive shells now behave as if SIGTSTP/SIGTTIN/SIGTTOU are set to SIG_DFL when the shell is started, so they are set to SIG_DFL in child processes. ll. Posix-mode shells now allow double quotes to quote the history expansion character. mm. OLDPWD can be inherited from the environment if it names a directory. nn. Shells running as root no longer inherit PS4 from the environment, closing a security hole involving PS4 expansion performing command substitution. oo. If executing an implicit `cd' when the `autocd' option is set, bash will now invoke a function named `cd' if one exists before executing the `cd' builtin. pp. Value conversions (arithmetic expansions, case modification, etc.) now happen when assigning elements of an array using compound assignment. qq. There is a new option settable in config-top.h that makes multiple directory arguments to `cd' a fatal error. rr. Bash now uses mktemp() when creating internal temporary files; it produces a warning at build time on many Linux systems. 2. New Features in Readline a. The history truncation code now uses the same error recovery mechansim as the history writing code, and restores the old version of the history file on error. The error recovery mechanism handles symlinked history files. b. There is a new bindable variable, `enable-bracketed-paste', which enables support for a terminal's bracketed paste mode. c. The editing mode indicators can now be strings and are user-settable (new `emacs-mode-string', `vi-cmd-mode-string' and `vi-ins-mode-string' variables). Mode strings can contain invisible character sequences. Setting mode strings to null strings restores the defaults. d. Prompt expansion adds the mode string to the last line of a multi-line prompt (one with embedded newlines). e. There is a new bindable variable, `colored-completion-prefix', which, if set, causes the common prefix of a set of possible completions to be displayed in color. f. There is a new bindable command `vi-yank-pop', a vi-mode version of emacs- mode yank-pop. g. The redisplay code underwent several efficiency improvements for multibyte locales. h. The insert-char function attempts to batch-insert all pending typeahead that maps to self-insert, as long as it is coming from the terminal. i. rl_callback_sigcleanup: a new application function that can clean up and unset any state set by readline's callback mode. Intended to be used after a signal. j. If an incremental search string has its last character removed with DEL, the resulting empty search string no longer matches the previous line. k. If readline reads a history file that begins with `#' (or the value of the history comment character) and has enabled history timestamps, the history entries are assumed to be delimited by timestamps. This allows multi-line history entries. l. Readline now throws an error if it parses a key binding without a terminating `:' or whitespace. m. The default binding for ^W in vi mode now uses word boundaries specified by Posix (vi-unix-word-rubout is bindable command name). n. rl_clear_visible_line: new application-callable function; clears all screen lines occupied by the current visible readline line. o. rl_tty_set_echoing: application-callable function that controls whether or not readline thinks it is echoing terminal output. p. Handle >| and strings of digits preceding and following redirection specifications as single tokens when tokenizing the line for history expansion. q. Fixed a bug with displaying completions when the prefix display length is greater than the length of the completions to be displayed. r. The :p history modifier now applies to the entire line, so any expansion specifying :p causes the line to be printed instead of expanded. s. New application-callable function: rl_pending_signal(): returns the signal number of any signal readline has caught but not yet handled. t. New application-settable variable: rl_persistent_signal_handlers: if set to a non-zero value, readline will enable the readline-6.2 signal handler behavior in callback mode: handlers are installed when rl_callback_handler_install is called and removed removed when a complete line has been read.

Update to 4.3:

2014-03-12T10:08:46Z

This is a terse description of the new features added to bash-4.3 since the release of bash-4.2. As always, the manual page (doc/bash.1) is the place to look for complete descriptions. 1. New Features in Bash a. The `helptopic' completion action now maps to all the help topics, not just the shell builtins. b. The `help' builtin no longer does prefix substring matching first, so `help read' does not match `readonly', but will do it if exact string matching fails. c. The shell can be compiled to not display a message about processes that terminate due to SIGTERM. d. Non-interactive shells now react to the setting of checkwinsize and set LINES and COLUMNS after a foreground job exits. e. There is a new shell option, `globasciiranges', which, when set to on, forces globbing range comparisons to use character ordering as if they were run in the C locale. f. There is a new shell option, `direxpand', which makes filename completion expand variables in directory names in the way bash-4.1 did. g. In Posix mode, the `command' builtin does not change whether or not a builtin it shadows is treated as an assignment builtin. h. The `return' and `exit' builtins accept negative exit status arguments. i. The word completion code checks whether or not a filename containing a shell variable expands to a directory name and appends `/' to the word as appropriate. The same code expands shell variables in command names when performing command completion. j. In Posix mode, it is now an error to attempt to define a shell function with the same name as a Posix special builtin. k. When compiled for strict Posix conformance, history expansion is disabled by default. l. The history expansion character (!) does not cause history expansion when followed by the closing quote in a double-quoted string. m. `complete' and its siblings compgen/compopt now takes a new `-o noquote' option to inhibit quoting of the completions. n. Setting HISTSIZE to a value less than zero causes the history list to be unlimited (setting it 0 zero disables the history list). o. Setting HISTFILESIZE to a value less than zero causes the history file size to be unlimited (setting it to 0 causes the history file to be truncated to zero size). p. The `read' builtin now skips NUL bytes in the input. q. There is a new `bind -X' option to print all key sequences bound to Unix commands. r. When in Posix mode, `read' is interruptible by a trapped signal. After running the trap handler, read returns 128+signal and throws away any partially-read input. s. The command completion code skips whitespace and assignment statements before looking for the command name word to be completed. t. The build process has a new mechanism for constructing separate help files that better reflects the current set of compilation options. u. The -nt and -ot options to test now work with files with nanosecond timestamp resolution. v. The shell saves the command history in any shell for which history is enabled and HISTFILE is set, not just interactive shells. w. The shell has `nameref' variables and new -n(/+n) options to declare and unset to use them, and a `test -R' option to test for them. x. The shell now allows assigning, referencing, and unsetting elements of indexed arrays using negative subscripts (a[-1]=2, echo ${a[-1]}) which count back from the last element of the array. y. The {x}

Add two new entries.

2011-03-12T15:55:22Z

Update to 4.1:

2010-01-16T17:17:04Z

This document details the changes between this version, bash-4.1-rc, and the previous version, bash-4.1-beta. 1. Changes to Bash a. Fixed a bug that caused printf to not return a partial value when it encountered an error while converting an integer argument. b. Fixed a bug that caused setting one of the compatNN options to not turn off the others. c. The (undocumented) --wordexp option is no longer included by default. d. Fixed a bug in conditional command execution that caused it to not correctly ignore the exit status under certain circumstances. e. Added a configure-time check for correctly-working asprintf/snprintf. f. Fixed some problems with line number calculation and display when sourcing a file in an interactive shell. g. Fixed a bug that caused the shell to crash when using `declare -A foo=bar'. h. Fixed a bug that caused an off-by-one error when calculating the directories to display with the PROMPT_DIRTRIM option. 2. Changes to Readline a. Fixed a bug that caused applications using the callback interface to not react to SIGINT (or other signals) until another character arrived. ------------------------------------------------------------------------------ This document details the changes between this version, bash-4.1-beta, and the previous version, bash-4.1-alpha. 1. Changes to Bash a. Fixed a bug in mapfile that caused the shell to crash if it was passed the name of an associative array. b. Fixed a bug that caused the shell to incorrectly split case patterns if they contained characters in $IFS. c. Fixed a bug that caused the shell to set $? to the wrong value when using a construct ending with a variable assignment with set -x enabled and PS4 containing a command substitution. d. Fixed a bug that caused the shell to read commands incorrectly if an expansion error occurred under certain conditions in a user-specified subshell. e. Fixed a bug that caused the shell to set $? incorrectly if a parse error occurred in an evaluation context ("eval", trap command, dot script, etc.) f. Fixed a bug that caused the shell to attempt command substitution completion within a single-quoted string. g. Fixed a bug that caused the shell to insert an extra single quote during word completion. h. Fixed a bug that caused the shell to crash if invoked with the environment variable EMACS having a null value. i. Fixed a bug that caused bash to incorrectly report the presence of new mail in a `maildir' environment. j. Fixed a bug that caused the shell to not recognize a here-document ending delimiter inside a command substitution. k. Fixed a bug that caused the shell to crash when a a dynamic array variable was assigned a scalar value. 2. Changes to Readline 3. New Features in Bash a. The mapfile/readarray builtin no longer stores the commands it invokes via callbacks in the history list. b. There is a new `compat40' shopt option. c. The < and > operators to [[ do string comparisons using the current locale only if the compatibility level is greater than 40 (set to 41 by default). 4. New Features in Readline ------------------------------------------------------------------------------ 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 (using new rl_filename_rewrite_hook), globbing, and readline redisplay. ll. The ERR and EXIT traps now see a non-zero value for $? when a parser error after set -e has been enabled causes the shell to exit. mm. Fixed a bug that in brace expansion that caused zero-prefixed terms to not contain the correct number of digits. nn. Fixed a bug that caused the shell to free non-allocated memory when unsetting an associative array which had had a value implicitly assigned to index "0". oo. Fixed a memory leak in the ${!prefix@} expansion. pp. Fixed a bug that caused printf to not correctly report all write errors. qq. Fixed a bug that caused single and double quotes to act as delimiters when splitting a command line into words for programmable completion. rr. Fixed a bug that caused ** globbing that caused **/path/* to match every directory, not just those matching `path'. ss. Fixed a bug that caused the shell to dump core when running `help' without arguments if the terminal width was fewer than 7 characters. 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. h. Fixed a bug that caused history expansion to be attempted on $'...' single-quoted strings. i. Fixed a bug that caused incorrect redisplay when the prompt contained multibyte characters in an `invisible' sequence bracketed by \[ and \]. j. Fixed a bug that caused history expansion to short-circuit after encountering a multibyte character. 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. There is a new confgure option that forces the extglob option to be enabled by default. o. New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace output to that file descriptor. p. If the optional left-hand-side of a redirection is of the form {var}, the shell assigns the file descriptor used to $var or uses $var as the file descriptor to move or close, depending on the redirection operator. q. The < and > operators to the [[ conditional command now do string comparison according to the current locale. r. Programmable completion now uses the completion for `b' instead of `a' when completion is attempted on a line like: a $(b c. s. Force extglob on temporarily when parsing the pattern argument to the == and != operators to the [[ command, for compatibility. t. Changed the behavior of interrupting the wait builtin when a SIGCHLD is received and a trap on SIGCHLD is set to be Posix-mode only. u. The read builtin has a new `-N nchars' option, which reads exactly NCHARS characters, ignoring delimiters like newline. 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 completed. f. New bindable variable: skip-completed-text, active when completing in the middle of a word. If enabled, it means that characters in the completion that match characters in the remainder of the word are "skipped" rather than inserted into the line. g. The pre-readline-6.0 version of menu completion is available as "old-menu-complete" for users who do not like the readline-6.0 version. h. New bindable variable: echo-control-characters. If enabled, and the tty ECHOCTL bit is set, controls the echoing of characters corresponding to keyboard-generated signals. i. New bindable variable: enable-meta-key. Controls whether or not readline sends the smm/rmm sequences if the terminal indicates it has a meta key that enables eight-bit characters.

Update to 4.0:

2009-02-24T12:04:09Z

1. 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. The name `readarray' is a synonym. 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. ll. 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. mm. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged mode. nn. 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. oo. 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. 2. 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. j. If the kernel supports it, readline displays special characters corresponding to a keyboard-generated signal when the signal is received.

Strip ${PKGLOCALEDIR} from PLISTs of packages that already obey

2006-04-17T07:07:11Z

PKGLOCALEDIR and which install their locale files directly under ${PREFIX}/${PKGLOCALEDIR} and sort the PLIST file entries. From now on, pkgsrc/mk/plist/plist-locale.awk will automatically handle transforming the PLIST to refer to the correct locale directory.