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Chet Ramey
106 lines
4.6 KiB
Groff
106 lines
4.6 KiB
Groff
o Here-documents within $(...) command substitutions may once more be
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delimited by the closing right paren, instead of requiring a newline.
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o Bash's file status checks (executable, readable, etc.) now take file
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system ACLs into account on file systems that support them.
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o Bash now passes environment variables with names that are not valid
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shell variable names through into the environment passed to child
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processes.
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o The `execute-unix-command' readline function now attempts to clear and
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reuse the current line rather than move to a new one after the command
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executes.
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o `printf -v' can now assign values to array indices.
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o New `complete -E' and `compopt -E' options that work on the "empty"
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completion: completion attempted on an empty command line.
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o New complete/compgen/compopt -D option to define a `default' completion:
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a completion to be invoked on command for which no completion has been
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defined. If this function returns 124, programmable completion is
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attempted again, allowing a user to dynamically build a set of completions
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as completion is attempted by having the default completion function
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install individual completion functions each time it is invoked.
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o When displaying associative arrays, subscripts are now quoted.
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o Changes to dabbrev-expand to make it more `emacs-like': no space appended
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after matches, completions are not sorted, and most recent history entries
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are presented first.
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o The [[ and (( commands are now subject to the setting of `set -e' and the
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ERR trap.
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o The source/. builtin now removes NUL bytes from the file before attempting
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to parse commands.
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o There is a new configuration option (in config-top.h) that forces bash to
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forward all history entries to syslog.
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o A new variable $BASHOPTS to export shell options settable using `shopt' to
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child processes.
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o There is a new confgure option that forces the extglob option to be
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enabled by default.
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o New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace
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output to that file descriptor.
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o If the optional left-hand-side of a redirection is of the form {var}, the
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shell assigns the file descriptor used to $var or uses $var as the file
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descriptor to move or close, depending on the redirection operator.
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o The < and > operators to the [[ conditional command now do string
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comparison according to the current locale.
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o Programmable completion now uses the completion for `b' instead of `a'
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when completion is attempted on a line like: a $(b c.
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o Force extglob on temporarily when parsing the pattern argument to
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the == and != operators to the [[ command, for compatibility.
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o Changed the behavior of interrupting the wait builtin when a SIGCHLD is
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received and a trap on SIGCHLD is set to be Posix-mode only.
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o The read builtin has a new `-N nchars' option, which reads exactly NCHARS
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characters, ignoring delimiters like newline.
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o The mapfile/readarray builtin no longer stores the commands it invokes via
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callbacks in the history list.
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o There is a new `compat40' shopt option.
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o The < and > operators to [[ do string comparisons using the current locale
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only if the compatibility level is greater than 40 (set to 41 by default).
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o New bindable readline function: menu-complete-backward.
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o In the readline vi-mode insertion keymap, C-n is now bound to menu-complete
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by default, and C-p to menu-complete-backward.
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o When in readline vi command mode, repeatedly hitting ESC now does nothing,
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even when ESC introduces a bound key sequence. This is closer to how
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historical vi behaves.
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o New bindable readline function: skip-csi-sequence. Can be used as a
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default to consume key sequences generated by keys like Home and End
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without having to bind all keys.
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o New bindable readline variable: skip-completed-text, active when
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completing in the middle of a word. If enabled, it means that characters
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in the completion that match characters in the remainder of the word are
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"skipped" rather than inserted into the line.
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o The pre-readline-6.0 version of menu completion is available as
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"old-menu-complete" for users who do not like the readline-6.0 version.
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o New bindable readline variable: echo-control-characters. If enabled, and
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the tty ECHOCTL bit is set, controls the echoing of characters
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corresponding to keyboard-generated signals.
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o New bindable readline variable: enable-meta-key. Controls whether or not
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readline sends the smm/rmm sequences if the terminal indicates it has a
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meta key that enables eight-bit characters.
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