Imported from ../bash-3.0.tar.gz.
This commit is contained in:
Jari Aalto
parent
7117c2d221
commit
b80f6443b6
400 changed files with 69247 additions and 13346 deletions
711
CHANGES
711
CHANGES
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@ -1,3 +1,712 @@
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This document details the changes between this version, bash-3.0-release,
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and the previous version, bash-3.0-rc1.
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||||
1. Changes to Bash
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a. Fixed a boundary overrun that could cause segmentation faults when the
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completion code hands an incomplete construct to the word expansion
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functions.
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b. Changed posix mode behavior so that an error in a variable assignment
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preceding a special builtin causes a non-interactive shell to exit.
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c. Change the directory expansion portion of the completion code to not
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expand embedded command substitutions if the directory name appears in
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the file system.
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d. Fixed a problem that caused `bash -r' to turn on restrictions before
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reading the startup files.
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e. Fixed a problem with the default operation of the `umask' builtin.
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2. Changes to Readline
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a. Fixed a problem with readline saving the contents of the current line
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before beginning a non-interactive search.
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b. Fixed a problem with EOF detection when using rl_event_hook.
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c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric
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arguments.
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------------------------------------------------------------------------------
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This document details the changes between this version, bash-3.0-rc1,
|
||||
and the previous version, bash-3.0-beta1.
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||||
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1. Changes to Bash
|
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a. Fixed a bug that caused incorrect behavior when referecing element 0 of
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an array using $array, element 0 was unset, and `set -u' was enabled.
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b. System-specific changes for: SCO Unix 3.2, Tandem.
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c. Fixed a bug that caused inappropriate word splitting when a variable was
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expanded within a double-quoted string that also included $@.
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d. Fixed a bug that caused `pwd' to not display anything in physical mode
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when the file system had changed underneath the shell.
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e. Fixed a bug in the pre- and post- increment and decrement parsing in the
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expression evaluator that caused errors when the operands and corresponding
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operators were separated by whitespace.
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f. Fixed a bug that caused `history -p' to add an entry to the history list,
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counter to the documentation. (Keeps the history expansions invoked by
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emacs-mode command line editing from doing that as well.)
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g. Fixed a bug that could cause a core dump if `cd' is asked to print out a
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pathname longer than PATH_MAX characters.
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h. Fixed a bug that caused jobs to be put into the wrong process group under
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some circumstances after enabling job control with `set -m'.
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i. `unalias' now returns failure if no alias name arguments are supplied.
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j. Documented the characters not allowed to appear in an alias name.
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k. $* is no longer expanded as if in double quotes when it appears in the
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body of a here document, as the SUS seems to require.
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l. The `bashbug' script now uses a directory in $TMPDIR for exclusive
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access rather than trying to guess how the underlying OS provides for
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secure temporary file creation.
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m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames
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longer than PATH_MAX characters.
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n. Fixed a memory leak caused when creating multiple local array variables
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with identical names.
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o. Fixed a problem with calls to getcwd() so that bash now operates better
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when the full pathname to the current directory is longer than PATH_MAX
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bytes.
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p. The `trap' builtin now reports an error if a single non-signal argument
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is specified.
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q. Fixed a bug that caused `umask' to not work correctly when presented
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with a mask of all 0s.
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r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX
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appears to specify.
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s. Interactive mode now depends on whether or not stdin and stderr are
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connected to a tty; formerly it was stdin and stdout. POSIX requires
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this.
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t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the
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right kind of filename generation).
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2. Changes to Readline
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a. Fixed a problem that could cause readline to refer to freed memory when
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moving between history lines while doing searches.
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b. Improvements to the code that expands and displays prompt strings
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containing multibyte characters.
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c. Fixed a problem with vi-mode not correctly remembering the numeric argument
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to the last `c'hange command for later use with `.'.
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d. Fixed a bug in vi-mode that caused multi-digit count arguments to work
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incorrectly.
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e. Fixed a problem in vi-mode that caused the last text modification command
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to not be remembered across different command lines.
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f. Fixed problems with changing characters and changing case at the end of
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the line.
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3. New Features in Bash
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a. The `jobs', `kill', and `wait' builtins now accept job control notation
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even if job control is not enabled.
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b. The historical behavior of `trap' that allows a missing `action' argument
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to cause each specified signal's handling to be reset to its default is
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now only supported when `trap' is given a single non-option argument.
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4. New Features in Readline
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a. When listing completions, directories have a `/' appended if the
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`mark-directories' option has been enabled.
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------------------------------------------------------------------------------
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This document details the changes between this version, bash-3.0-beta1,
|
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and the previous version, bash-3.0-alpha.
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||||
|
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1. Changes to Bash
|
||||
|
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a. Fixes to build correctly when arrays are not compiled into the shell.
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|
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b. Fixed command substitution to run any exit trap defined in the command
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substitution before returning; the exit trap is not inherited from the
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calling shell.
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c. Fixes to process group synchronization code so that every child process
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attempts to set the terminal's process group; fixes some synchronization
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problems on Linux kernels that schedule the child to always run before
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the parent.
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d. Fixed processing of octal and hex constants in printf builtin for POSIX.2
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compliance.
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e. Fixed a couple of core dumps in the pattern removal code.
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f. Fixes to the array subrange extraction code to deal better with sparse
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arrays.
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g. Parser errors and other errors that result in the shell exiting now cause
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the exit trap to be run.
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h. Change the command substitution completion functions to not append any
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closing quote, because it would be inserted a closing "`" or ")".
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i. Fix history initialization so assignments to $histchars made in startup
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files are honored.
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j. If an exit trap does not contain a call to `exit', the shell now uses
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the exit status of the last command executed before the trap as the exit
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status of the shell.
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k. The parser now prompts with $PS2 if it reads a newline while parsing a
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compound array assignment statement.
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l. When performing a compound array assignment, the parser doesn't treat
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words of the form [index]=value as assignments if they're the result of
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expansions.
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m. Fixed a bug that caused `return' executed in a trap command to make the
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shell think it was still running the trap.
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n. Fixed the value of errno set by the pathname canonicalization functions.
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o. Changed the grammar so that `time' alone on a line times a null command
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||||
rather than being a syntax error.
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p. The pattern substitution coded no longer performs quote removal on the
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pattern before trying to match it, as the pattern removal functions do.
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q. Fixed a bug that could cause core dumps when checking whether a quoted
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||||
command name was being completed.
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|
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r. Fixes to the pattern removal and pattern replacement expansions to deal
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with multibyte characters better (and faster).
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||||
|
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s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly
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multibyte) characters instead of raw bytes.
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t. Fixed a bug that caused some key bindings set in an inputrc to be ignored
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at shell startup.
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|
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u. Fixed a bug that caused unsetting a local variable within a function to
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||||
not work correctly.
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v. Fixed a bug that caused invalid variables to be created when using
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`read -a'.
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w. Fixed a bug that caused "$@" to expand incorrectly when used as the right
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||||
hand side of a parameter expansion such as ${word:="$@"} if the first
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||||
character of $IFS was not a space.
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x. Fixed a slight cosmetic problem when printing commands containing a
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`>&word' redirection.
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||||
|
||||
y. Fixed a problem that could cause here documents to not be created correctly
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||||
if the system temporary directory did not allow writing.
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||||
|
||||
2. Changes to Readline
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||||
|
||||
a. Change to history expansion functions to treat `^' as equivalent to word
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one, as the documention states.
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||||
|
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b. Some changes to the display code to improve display and redisplay of
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multibyte characters.
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||||
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c. Changes to speed up the multibyte character redisplay code.
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d. Fixed a bug in the vi-mode `E' command that caused it to skip over the
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last character of a word if invoked while point was on the word's
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||||
next-to-last character.
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||||
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e. Fixed a bug that could cause incorrect filename quoting when
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case-insensitive completion was enabled and the word being completed
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contained backslashes quoting word break characters.
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f. Fixed a bug in redisplay triggered when the prompt string contains
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invisible characters.
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||||
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||||
g. Fixed some display (and other) bugs encountered in multibyte locales
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||||
when a non-ascii character was the last character on a line.
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h. Fixed some display bugs caused by multibyte characters in prompt strings.
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i. Fixed a problem with history expansion caused by non-whitespace characters
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used as history word delimiters.
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||||
|
||||
3. New Features in Bash
|
||||
|
||||
a. printf builtin understands two new escape sequences: \" and \?.
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|
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b. `echo -e' understands two new escape sequences: \" and \?.
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c. The GNU `gettext' package and libintl have been integrated; the shell's
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messages can be translated into different languages.
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d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'.
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||||
|
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e. The error message printed when bash cannot open a shell script supplied
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||||
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
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||||
quote character readline finds before it calls the application completion
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||||
function.
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||||
|
||||
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
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||||
value if readline determines that the word to be completed is quoted.
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||||
Set before readline calls any application completion function.
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||||
|
||||
d. New function hook, rl_completion_word_break_hook, called when readline
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||||
needs to break a line into words when completion is attempted. Allows
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||||
the word break characters to vary based on position in the line.
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||||
|
||||
e. New bindable command: unix-filename-rubout. Does the same thing as
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||||
unix-word-rubout, but adds `/' to the set of word delimiters.
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||||
|
||||
------------------------------------------------------------------------------
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||||
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 $TMOUT) run ~/.bash_logout.
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||||
|
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g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD.
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||||
|
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h. The parser no longer adds implicit double quotes to ((...)) arithmetic
|
||||
commands.
|
||||
|
||||
i. The ((...)) arithmetic command evaluation code was fixed to not dump core
|
||||
when the expanded string is null.
|
||||
|
||||
j. The ((...)) arithmetic command evaluation code was fixed to not perform
|
||||
variable assignments while expanding the expression.
|
||||
|
||||
k. Fixed a bug that caused word splitting to be performed incorrectly when
|
||||
IFS is set, but null.
|
||||
|
||||
l. Fixed a bug in brace expansion that caused a quoted `$' 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.
|
||||
|
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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.
|
||||
|
||||
|
|
@ -157,7 +866,7 @@ e. The `fc' builtin has been fixed, as POSIX requires, to use the closest
|
|||
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 bettern in compound commands.
|
||||
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 `='
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue