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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.
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).
r. `read' has a new `-u fd' option to read from a specified file descriptor.
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.
z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup
and close).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.
dd. All builtins that take operands accept a `--' pseudo-option, except `echo'.
2. 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.
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 is a terse description of the new features added to bash-2.05a since the release of bash-2.05. As always, the manual page (doc/bash.1) is the place to look for complete descriptions.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.
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.
p. `for' loops now allow empty word lists after `in', like the latest POSIX drafts require.
q. 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'
r. `ulimit' now prints the option letter associated with a particular resource when printing more than one limit.
s. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively.
t. The `printf' builtin now handles the %a and %A conversions if they're implemented by printf(3).
u. The `printf' builtin now handles the %F conversion (just about like %f).
v. 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.
2. 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. 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.
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The Bash Debugger Project contains patched sources to BASH that enable better debugging support as well as improved error reporting. In addition, this project contains the most comprehensive source-code debugger for bash that has been written.
Since this project maintains as an open CVS development and encourages developers and ideas, the space could be also be used springboard for other experiments and additions to BASH. If you are interesting in contributing to this project, please contact [email protected].
However, if you are looking for the plain vanilla BASH, try here.
| Documentation | On-line documentation. |
|---|---|
| Download | Get the latest version here. |
| CVS | Browse the CVS Tree |
| Sourceforge | The sourceforge.net project page. |
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