History of Yash
Legend:
+: new feature
-: removed feature
=: specification change
*: bug fix
x: new bug
----------------------------------------------------------------------
Yash 2.35
+ '--traceall' option.
+ New completion scripts for:
git-clean, git-grep, git-ls-remote, git-submodule,
git-whatchanged
+ Updated completion scripts for:
git-cherry-pick, git-rebase (Git 1.8.1.4),
ssh, ssh-add, ssh-keygen (OpenSSH 6.2)
= The condition for exiting the shell when the -e option is enabled
has been changed in accordance with the 2013 edition of
POSIX.1-2008.
= The "++" and "--" operators are no longer supported in the
POSIXly-correct mode.
= The $RANDOM variable now always returns random numbers, ignoring
the value from the environment variable, if any.
= If yash encounters a too long line that cannot be handled while
reading a history file, it now tries to keep reading the rest of
the file rather than stopping reading.
= Very long command lines are no longer saved in the history file.
* Minor fix in a syntax error message.
* Minor fix in completion script for "git", "ssh" and "rsync".
----------------------------------------------------------------------
Yash 2.34
+ New "test" built-in operator: =~, -o (unary)
+ New completion scripts for:
configure, git-name-rev, git-request-pull, make, rsync
= A syntax error or expansion error in .yash_profile or .yashrc
no longer makes the shell exit even when the shell is not
interactive.
= In line-editing, overwritten characters are now restored when you
hit the backspace key.
= In line-editing, the undo history is no longer saved for each
backspace.
* Fixes in completion scripts for "git".
----------------------------------------------------------------------
Yash 2.33
= The "help" built-in now prints brief usage of built-ins.
= Some error messages for command syntax error have been revised.
= Some built-ins now check command syntax more strictly.
* The "set" built-in aborts the shell on a command syntax error
as specified in POSIX.
----------------------------------------------------------------------
Yash 2.32
+ Man page and HTML manual in English and Japanese.
= The "help" built-in now prints part of the man page.
* Fixes in completion scripts for "git".
----------------------------------------------------------------------
Yash 2.31
+ Completion of directory stack indices in extended tilde
expansion.
+ New option for the "complete" built-in: --dirstack-index
+ Completion for "svn" version 1.7.
* Fixes in "git", "tar" and "su" completion scripts.
----------------------------------------------------------------------
Yash 2.30
* Fixed pathname completion for redirections.
+ New completion scripts for:
svn, git, gitg, gitk, and gitx.
* Minor fixes in completion scripts.
----------------------------------------------------------------------
Yash 2.29
+ An alias value now can contain newlines.
* Fixed invalid memory access on printing an empty array using the
"typeset" built-in.
* The function body is now correctly executed in a subshell when
the body is defined using the (...) compound command.
* In line-editing, the undo command can now be applied only to the
history entry that is being edited.
----------------------------------------------------------------------
Yash 2.28
= In an interactive shell, mail check is now done before job status
report.
* Fixed arithmetic expansion evaluating some expressions that
should not be evaluated.
* Fixed the "array" built-in removing the wrong elements when
positive and negative indices are intermixed with the -d option.
* Fixed the EXIT trap being wrongly executed after a command-not-
found error.
* The EXIT trap is now executed with the correct redirection when
the last command had redirection.
* The "exec" built-in now correctly exports arrays that are just
assigned.
* ${#@} is now correctly expanded to an array of integers that
represent the lengths of array elements.
* Fixed infinite loop in sequential brace expansion.
* Fixed configuration file parsing in completion of the "ssh"
command.
* The "-T" option of the "ln" and "mv" commands now can be
completed.
* The EXIT trap now can be completed.
----------------------------------------------------------------------
Yash 2.27
* Minor bug fixes.
+ New completion scripts for:
awk, chsh, gawk, nawk, pgawk, scp, sftp, ssh-add, ssh-agent,
ssh-keygen, su, sudo, sudoedit, and useradd.
* Fix in completion scripts for the "set" and "tar" commands.
----------------------------------------------------------------------
Yash 2.26
+ New option for the "return" built-in: -n (--no-return)
= Error messages have been revised.
= Shell option names have been generalized: Option names are now
case-insensitive. Non-alphanumeric characters are ignored in
option names. Options can be inverted by prefixing "no" to
their names.
= "case foo in (esac) bar; esac" is now rejected in the POSIXly
correct mode.
= The "-o noexec" option is now ignored in an interactive shell.
= New mail notification is now printed only when the mailbox file
is not empty.
= "printf %c ''" now prints nothing as "printf %c" do.
= In an invocation of the "complete" built-in with the -A or -R
option, the pattern is now matched against the last component of
the pathname when generating pathname candidates with the -f
option.
* Function names containing an '=' sign can now be specified as
arguments to the typeset and unset built-ins (with the -f
option).
* Fixed the exit status of iterative execution that was interrupted
by SIGINT.
+ New completion scripts for:
bsdtar, eview, evim, gex, gnutar, gtar, return, rgview, rgvim,
rview, rvim, slogin, ssh, tar, and which.
* Many fixes in completion scripts for:
bash, chmod, dash, less, mksh, set, sh, and umask.
----------------------------------------------------------------------
Yash 2.25
= In the completion candidate list, options are now sorted case-
insensitively.
= While executing a completion function, the $IFS is reset to the
default value.
+ New completion scripts for:
bash, csplit, dash, diff, ed, egrep, env, ex, expand, fgrep,
file, find, fold, getconf, grep, gview, gvim, gvimdiff, head,
iconv, id, join, ksh, less, ln, locale, man, mesg, mkdir, mkfifo,
mksh, more, mv, newgrp, nice, nl, nohup, od, paste, patch,
pathchk, pr, ps, renice, rm, rmdir, sed, sh, sort, split, stty,
tail, tee, time, touch, tr, uname, uniq, vi, view, vim, vimdiff,
wc, who, xargs, and yash.
* Many fixes in completion scripts for:
cat, cd, chgrp, chmod, chown, cmp, comm, cp, crontab, cut, date,
df, du, exec, ls, and set.
----------------------------------------------------------------------
Yash 2.24
+ New option for the "." built-in: -L
+ New options for the "command" built-in: -a, -f, -k
- Removed the -B option for the "command" built-in.
= Fixed configuration process so that the shell can handle all
kinds of signals on FreeBSD.
= [line-editing] New command completion mechanism. The "complete"
built-in now has new syntax and semantics. Completion settings
are now autoloaded from $YASH_LOADPATH.
+ New completion scripts for:
basename, bg, cat, chgrp, chmod, chown, cmp, comm, command, cp,
crontab, cut, date, df, du, export, popd, pushd, readonly, type,
".", and "[".
= Revised completion scripts for:
alias, array, bindkey, break, cd, complete, continue, dirs,
disown, echo, eval, exec, exit, fc, fg, getopts, hash, help,
history, jobs, kill, ls, printf, pwd, read, set, suspend, test,
trap, typeset, ulimit, umask, unalias, unset, and wait.
- Removed completion script for the "return" built-in.
= Short options now come before long options in a completion
candidate list.
* Symbolic links to non-existent files can now be completed.
* Other fixes in command completion.
* Fixed invalid memory access on parameter expansion failure in
redirection.
----------------------------------------------------------------------
Yash 2.23
* Traps are no longer handled during completion to avoid messing up
the display.
* Fixed invalid memory access during completion. When the notify
option is enabled, the shell was wrongly trying to notify the job
status while executing a candidate generator function.
* The "-o verbose" option is now disabled during completion to
suppress the auto-loaded script being printed.
* Fixed completion script for the "kill" built-in.
----------------------------------------------------------------------
Yash 2.22
+ New "test" built-in operators: -G, -O, -N
+ Completion settings are now autoloaded from $YASH_COMPPATH.
+ New completion scripts for:
alias, array, bindkey, break, cd, complete, continue, dirs,
disown, echo, eval, exec, exit, fc, fg, getopts, hash, help,
history, jobs, kill, ls, printf, pwd, read, return, set, suspend,
test, trap, typeset, ulimit, umask, unalias, unset, and wait.
* Fix a bug that was causing a signal received by a just-created
subshell to be wrongly ignored.
* Other bug fixes
----------------------------------------------------------------------
Yash 2.21
+ Command line completion
= In an interactive shell, the value of $LINENO is now reset to 1
every time a command is input and executed.
* The "function" keyword was not recognized by "command -v".
* Fixed handling of SIGINT so that the interactive shell properly
gets back to normal after receiving SIGINT.
* Input reading functions rewritten, including some bug fixes.
----------------------------------------------------------------------
Yash 2.20
+ Function definition using the "function" keyword.
= The "-nt" and "-ot" operators of the "test" built-in now consider
a non-existent file older in favor of Korn shell.
= [line-editing] some editing commands have been renamed:
vi-change-all -> vi-change-line
vi-yank-and-change-all -> vi-yank-all-change-line
vi-append-end -> vi-append-to-eol
* [line-editing] the clear-and-redraw-all command was broken.
----------------------------------------------------------------------
Yash 2.19
+ The "ulimit" built-in is now available on FreeBSD.
+ In mail checking, the timestamp of the mail file is now compared
by the nanosecond if possible.
+ [line-editing] new line-editing commands:
oldest-history-bol, newest-history-bol, return-history-bol,
prev-history-bol, next-history-bol,
beginning-search-forward, beginning-search-backward
= Faster filename pattern matching.
= [line-editing] the "accept-line" command no longer accepts a
failing history search result.
= [line-editing] the following commands have been changed not to
move the cursor to the beginning of the line:
oldest-history, newest-history, return-history,
prev-history, next-history
The new commands whose names end with "-bol" provide the
previous behaviors.
* Fixed broken output of array assignment traces.
* [line-editing] the "vi-edit-and-accept" command now handles the
count.
* [line-editing] fixed the cursor position after the
search-again-forward/backward command in the emacs-like mode.
----------------------------------------------------------------------
Yash 2.18
+ New operators for string comparison in the "test" built-in:
==, ===, !==, <, <=, >, >=
+ Operators "-nt" and "-ot" in the "test" built-in now compares the
modification time by the nanosecond if possible.
+ '--default-directory' option for the "cd" and "pushd" built-in.
+ '--remove-duplicates' option for the "pushd" built-in.
+ The right prompt and the styler prompt.
+ '--le-alwaysrp' option.
= The interpretation of escape sequences to change the font in
$PS1 and $PS2 has been changed.
= $PS3 no longer initialized.
= Escape sequences are now interpreted in $PS4 as well as in $PS1
and $PS2.
= The "echo" and "printf" built-ins now can print a null character.
* [line-editing] $LINES and $COLUMNS were wrongly ignored.
* [line-editing] fixed font color for some terminals.
----------------------------------------------------------------------
Yash 2.17
+ '--le-visiblebell' option.
+ New operators for version comparison in the "test" built-in:
-veq, -vne, -vgt, -vge, -vlt, -vle
+ [line-editing] "eof" command
= The "typeset" built-in now prints only local variables when
invoked without the -g option or operands.
= The "typeset" built-in now prints function definitions in a
pretty format.
= When not in POSIXly-correct mode, commands in command substitu-
tion are now parsed when the command containing the substitution
is parsed.
* Fixed the parse error on parameter expansion "${#}".
* Fixed the "wait" built-in wrongly trying to wait for non-parent
processes when invoked in a subshell.
* [line-editing] vi-replace-char command was broken.
* Many other bug fixes
----------------------------------------------------------------------
Yash 2.16
+ '--curbg' and '--curstop' options.
= '--curasync' option is now set by default.
= Changed exit status of a while/until loop whose body is empty.
= The "return" and "exit" built-ins now accepts an exit status of
256 or larger.
= The "echo" built-in now interprets octal escapes only beginning
with a backslash followed by a zero.
* Fixed a syntax error of a special built-in invoked thru the
"command" built-in causing the non-interactive shell to exit.
* Fixed the exit status of the shell when the EXIT trap is set.
* The '--allexport' option was wrongly ignored by the "read" and
"getopts" built-ins.
* Fixed segfaults and other errors in the "getopts" built-in.
* [line-editing] Fixed the vi-replace-char command causing invalid
memory access.
* [line-editing] Fixed the emacs-just-one-space command not leaving
space(s).
----------------------------------------------------------------------
Yash 2.15
+ An interactive shell now can be interrupted by SIGINT.
+ Bracket expressions in pathname expansion are now fully supported
(provided that libc's regex implementation is correct).
= The "suspend" built-in now requires the -f option to suspend an
interactive shell that is a session leader.
= The shell no longer automatically sets the $YASH_LE_TIMEOUT
variable.
= A job-control shell now stops itself when invoked in the
background.
= A job-control shell no longer ignores SIGTTOU by default.
= The '--nocaseglob' option no longer affects pattern matching in
parameter expansions of the form "${var#xxx}", "${var%xxx}", etc.
* Fixed pathname expansion on redirection target.
* Couldn't set a signal handler to the default by the "trap"
built-in if the signal was ignored on invocation of an inter-
active shell.
* Fixed accidental interruption of built-ins by signals.
* Fixed parser so that a non-simple command is properly parsed
after alias substitution.
* Various bug fixes
----------------------------------------------------------------------
Yash 2.14
+ The -l option for the "bindkey" built-in.
+ Negative array indices are now allowed.
= $PWD is now set to "/" (rather than "/..") after "cd /..".
= The "command" built-in with the -vb option now ignores shell
keywords, aliases and functions.
= Most of the built-ins now prints an error message and returns
non-zero when they cannot print something to the standard output.
= The "pwd" and "times" built-ins now fail when an operand is
given.
= The shell no longer exits when an assignment for a special
built-in failed if not in POSIXly-correct mode.
* "cd //" was failing if the current directory is "/".
* Invoking the "bindkey" built-in in the yashrc file was causing an
invalid memory access.
* The "command" built-in with the -vb option was failing to find
regular built-ins that are not in $PATH.
* The "dirs" command was going into an infinite loop if given an
argument.
* The -c and -d options are wrongly rejected by the "ulimit"
built-in.
* The "fg" built-in now refuses more than one operands in POSIXly-
correct mode, as described in the help.
----------------------------------------------------------------------
Yash 2.13
+ "history" built-in
+ The -i option for the "eval", "break" and "continue" built-ins.
+ The value of the $COMMAND_NOT_FOUND_HANDLER variable is now
executed when a command is not found.
- '--autocd' option
= The exit status is now one when the "return" built-in is used
outside a function in an interactive shell.
= Revised command search and execution.
* The shell would not exit after the "exit" built-in twice in a row
when you have $PROMPT_COMMAND set and you have stopped jobs.
* The "notifyle" option not working with $PROMPT_COMMAND set.
* [line-editing] Redoing was broken.
* [line-editing] The command line was not redrawn after trap
handling.
* [line-editing] Fixed some bugs in the vi-edit-and-accept command.
----------------------------------------------------------------------
Yash 2.12
+ Emacs-like line-editing.
+ "bindkey" built-in.
+ The $PROMPT_COMMAND variable now can be an array.
+ The value of the $YASH_AFTER_CD variable is now executed after
the working directory was changed.
= The "fg" and "bg" built-in now always sends SIGCONT to the
continued job.
= The "exit" built-in now warns about stopped jobs even when
executed after the "fg", "bg", "disown" or "wait" built-in.
* In vi-like line-editing, the wrong text was put after 30th yank.
* In vi-like line-editing, the "s" command cannot be used if the
cursor is at the beginning of line
----------------------------------------------------------------------
Yash 2.11
+ Added the "--histspace" and "--le-noconvmeta" options.
+ Support for the $HISTRMDUP variable.
+ Support for the $YASH_LE_TIMEOUT variable.
+ The "kill" built-in with the "-l" option now accepts signal names
as operands.
= The "--le-convmeta" option now is a Boolean option.
= The "$-" special parameter now includes the "l" flag if the
shell is a login shell.
* An empty case command "case i in (*) esac" now always returns the
exit status of zero.
* Quoted words were incorrectly expanded with backslashes when the
"-f" option is set.
* Fixed invalid memory access in the "v" command of vi-like
line-editing.
----------------------------------------------------------------------
Yash 2.10
+ History search in line-editing.
= Empty lines are no longer stored in the history.
= In the vi-like line-editing, "cw" and "cW" now work as in vi.
* Setting the "notifyle" option caused a segfault if yash was
configured with line-editing disabled.
* In line-editing, undoing a change to a history entry did not
restore the cursor position properly.
* Some fixes for invalid memory access during line-editing.
----------------------------------------------------------------------
Yash 2.9
+ Line-editing in the interactive mode.
x Line-editing is not fully implemented.
+ Multiple instances of shell that use the same file for the
history file now share the history.
- The "history" built-in has been removed.
= Now non-ASCII alphabets are allowed in variable names.
= Now nested parameter expansions must be enclosed by braces.
= The "help" built-in now prints an error message if the specified
built-in is not found.
* Fixed floating-point arithmetics in arithmetic expansions.
* Fixed parser for arithmetic expansions that was incorrectly
rejecting identifiers that start with underscores.
* Fixed parser that had trouble parsing parameter expansions
containing the hash sign like "${#=x}".
* Fixed the help message for the "pwd" built-in.
----------------------------------------------------------------------
Yash 2.8
+ Brace expansion with delta: {a..b..c}
+ The "command" built-in's -b and -B options now can be used with
the -v and -V options.
= Yash now conforms to POSIX.1-2008.
. The "read" built-in now always removes trailing white-spaces
from the input.
. The results of tilde expansion are no longer subject to field
splitting and pathname expansion.
. The "pwd" built-in with the -P option no longer sets the $PWD
variable.
. "cd -L foo/.." is no more the same as "cd -L ." in that it is
an error when the directory "foo" does not exist.
. The "command" built-in's -p option now can be used with the -v
and -V options.
. In POSIXly-correct mode, all asynchronous commands now ignore
SIGINT and SIGQUIT (even when job control is active).
* When executing commands edited by the "fc" built-in, the $?
variable was incorrectly assigned the exit status of the editor
invoked by "fc".
* Backslashes, commas and braces in $IFS were incorrectly ignored
in field splitting.
* Pathname expansion failed if we do not have the read permission
for the specified directory even when we only need the search
permission.
* The signal mask of commands invoked by the shell now inherits
that of the shell (except for trapped signals).
* The "command" built-in now properly handles directories given as
the commands when the "autocd" option is on.
----------------------------------------------------------------------
Yash 2.7
+ Parameter expansion ${array[index]:=value} now allows assignment
to an empty array element.
+ Here-string by the "<<<" operator.
+ New redirection operator ">>|" opens a pipe.
- Loop pipes no longer supported.
= The $IFS variable is always initialized to the default value when
the shell is invoked.
* The "echo" and "printf" built-ins now print an error message on
failure.
* A quoted period at the beginning of a filename was not properly
matching during filename expansion.
----------------------------------------------------------------------
Yash 2.6
+ Added the -q option to the fc built-in.
+ Compound commands may now contain no commands inside.
* "alias -p" now prints commands with proper escape.
* In POSIXly-correct mode, a semicolon followed by the identifier
followed by "for" is now treated as an error.
* Global aliases are now allowed after compound commands.
* The "fg" and "wait" built-ins were causing invalid memory access
when the "-o notify" option is enabled.
----------------------------------------------------------------------
Yash 2.5
= Redirection of FDs used by the shell is now error.
* Some redirection syntax errors were overlooked.
* Fixed the "sig.y" test failure.
* When an "exec" command with redirections is enclosed in a brace
with redirections, the redirections to the brace are now properly
closed after execution.
* Fixed parsing error of a comment after the identifier of a for
statement.
----------------------------------------------------------------------
Yash 2.4
= The long option for the -p option of the "jobs" built-in has been
changed from "--pid-only" to "--pgid-only".
* Trap of SIGCHLD, SIGINT, SIGTERM, SIGQUIT, SIGTSTP, SIGTTOU were
wrongly set to "ignore" in some condition.
* Signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGTSTP, SIGTTOU
were mistakenly reset in some moments.
* Fixed the exit status of the "wait" built-in returned when
interrupted by a signal.
* Fixed file access permission test
* "command -V xxx/yyy" now prints an error message if "xxx/yyy" is
not a valid command.
----------------------------------------------------------------------
Yash 2.3
= Now changing LC_CTYPE immediately takes effect if the shell is
interactive and not in the POSIXly-correct mode.
* Fixed parameter expansion: empty words are now expanded properly.
* Fixed a race condition, which was causing some signals ignored.
* Assignments using the typeset/readonly/export built-ins failed to
update the shell's internal data. This caused the shell to keep
using the old PATH after the PATH has been changed.
----------------------------------------------------------------------
Yash 2.2
+ "help", "pushd", "popd" and "dirs" built-ins
= The value of $PWD set by the "cd" built-in is fixed. It now has a
correct value when changing to a relative path from the root
directory.
* Pathname expansion not properly performed for patterns including
"." or "..".
----------------------------------------------------------------------
Yash 2.1
+ Array variables
+ "array", "echo", "printf" and "test" built-ins
+ The -A option for the "read" built-in
* The colon flag in a parameter expansion like "${FOO:-bar}" was
ignored if the value of the parameter begins with a certain
character.
* The readonly attribute was ignored when an assignment occurs
against a command invocation
* Passing "=" as a name to the "unset" built-in incorrectly unset
the positional parameters and caused a potential invalid memory
access.
* Field splitting on variable values that consist only of spaces
produced wrong results.
* Test of file access permission now uses the effective user/group
IDs rather than the real user/group IDs.
----------------------------------------------------------------------
Yash 2.0
+ "history" built-in
+ Command redirection
* A POSIXly-correct non-interactive shell exits when a paticular
error occurred on a special built-in according to POSIX.
* Alias substitution routines were improved.
* Other bug fixes
----------------------------------------------------------------------
Yash 2.0 beta2
+ Command history
+ "type", "hash" and "fc" built-ins
= If the "command" built-in with the -V option fails to find a
command, an message is printed.
* Invocation of an external command with an assignent to the $PATH
variable caused an invalid memory access.
* Single quote not parsed properly in some circumstances.
* Other bug fixes
----------------------------------------------------------------------
Yash 2.0 beta1
+ "read", "getopts" and "command" built-ins
+ '--autocd' and '--curasync' option
+ Mail check feature
+ The prompt command
= The "readonly" and "export" built-ins now affects global
variables by default.
* The standard input is no longer buffered
* The "typeset" built-in now allows any characters other than '='
for variable names.
* The special parameter $? reflects the exit status of a command
substitution in a variable assignment.
* Many other bug fixes
----------------------------------------------------------------------
Yash 2.0 beta0
+ "eval", "exec", ".", "times", "umask", "typeset", "export",
"readonly", "unset", "shift" and "trap" built-ins
+ "wait" built-in now can be interrupted
+ Arithmetic expansions
+ Interactive shell now notifies the process killed by a signal
- "/etc/profile" and "~/.profile" are no longer sourced on start-up
* Fixed token delimitation in alias substitution
* Fixed token delimitation on assignments without values
* Many other bug fixes
----------------------------------------------------------------------
Yash 2.0 alpha2
+ Initialization files such as "/etc/profile" and "~/.yashrc" are
now sourced on start-up.
+ '--noprofile', '--norcfile' and '--rcfile' options
+ "pwd", "set", "exit", "return", "break", "continue", "jobs",
"fg", "bg", "wait", "disown", "alias" and "unalias" built-ins
* '--nocaseglob' was misinterpreted as '-c'.
* It was not fully case-insensitive when '--nocaseglob' is on.
* If job control is off, an interactive shell no longer prints
changed status of jobs before prompt.
= Error handling for unset parameters was improved.
= The help message for 'yash --help' is now much briefer.
----------------------------------------------------------------------
Yash 2.0 alpha1
+ New options implemented: -x, -h, -a
= The default value of 'PS3' is not set in POSIXly-correct mode.
+ 'configure' accepts new '--no-undefined' option
+ ":", "true", "false", "cd" built-ins
* Command hashtable is now cleared when PATH is assigned.
* Assertion failure when a null character is input
* Many other bug fixes
----------------------------------------------------------------------
Yash 2.0 alpha0 (the first release of version 2.x)
x Arithmetic expansion is not implemented
x Built-ins are not implemented at all
