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c0334e32a1
Defining a .sh.tilde.get or .sh.tilde.set discipline function to extend tilde expansion works well as long as the discipline function doesn't get interrupted (e.g. with Crtl+C) or produce an error message. Either of those will cause the shell to become unstable and crash. This feature is now removed from the 1.0 branch as it is not ready for prime time. It can return to a release branch if/when we manage to fix it on the master branch. Related: https://github.com/ksh93/ksh/issues/346
141 lines
6.4 KiB
Text
141 lines
6.4 KiB
Text
Announcing: KornShell 93u+m 1.0.0-beta.2
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https://github.com/ksh93/ksh
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In May 2020, when every KornShell (ksh93) development project was
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abandoned, development was rebooted in a new fork based on the last
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stable AT&T version: ksh 93u+. This new fork is called ksh 93u+m as a
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permanent nod to its origin. We're restarting it at version 1.0. Please test
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this second beta and report any bugs you find, or help us fix known bugs.
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Main developers: Martijn Dekker, Johnothan King, hyenias
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Contributors: Andy Fiddaman, Anuradha Weeraman, Chase, Gordon Woodhull,
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Govind Kamat, Harald van Dijk, Lev Kujawski, Marc Wilson, Sterling Jensen
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HOW TO GET IT
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Please download the source code tarball from our GitHub releases page:
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https://github.com/ksh93/ksh/releases
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To build, follow the instructions in README.md or src/cmd/ksh93/README.
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HOW TO GET INVOLVED
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To report a bug, please open an issue at our GitHub page (see above).
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Alternatively, email me at martijn@inlv.org with your report.
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To get involved in development, read the brief policy information in
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README.md and then jump right in with a pull request or email a patch.
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See the TODO file in the top-level directory for a to-do list.
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MAIN CHANGES SINCE KSH 93U+M 1.0.0-BETA.1
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- Various fixes to the test/[ built-in command. It now supports all the same
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operators as [[ (including =~, \<, \>) except for the different 'and'/'or'
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operators. Note: test/[ remains deprecated due to its unfixable pitfalls.
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- Fixed a bug that could corrupt output if standard output is closed upon
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initializing the shell.
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- Fixed a bug in the [[ compound command: the '!' logical negation operator
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now correctly negates another '!', e.g., [[ ! ! 1 -eq 1 ]] now returns
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0/true. Note that this has always been the case for 'test'/'['.
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- Fixed SHLVL so that replacing ksh by itself (exec ksh) will not increase it.
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- Miscellaneous bugfixes.
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MAIN CHANGES SINCE KSH 93U+ 2012-08-01
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Hundreds of bugs have been fixed, including many serious/critical bugs.
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This includes upstreamed patches from OpenSUSE, Red Hat, and Solaris, fixes
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backported from the abandoned 93v- beta and ksh2020 fork, as well as many
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new fixes from the community. See the NEWS file for more information, and
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the git commit log for complete documentation of every fix. Incompatible
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changes have been minimised, but not at the expense of fixing bugs. For a
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list of potentially incompatible changes, see src/cmd/ksh93/COMPATIBILITY.
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Though there was a "no new features, bugfixes only" policy, some new
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features were found necessary, either to fix serious design flaws or to
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complete functionality that was evidently intended, but not finished.
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Below is a summary of these new features.
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New command line editor features:
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- The forward-delete and End keys are now handled as expected in the
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emacs and vi built-in line editors.
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- In the vi and emacs line editors, repeat count parameters can now also
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be used for the arrow keys and the forward-delete key. E.g., in emacs
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mode, <ESC> 7 <left-arrow> will now move the cursor seven positions to
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the left. In vi control mode, this would be entered as: 7 <left-arrow>.
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New shell language features:
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- The &>file redirection shorthand (for >file 2>&1) is now available for
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all scripts and interactive sessions and not only for profile/login
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scripts, bringing ksh 93u+m in line with mksh, bash, and zsh.
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- File name generation (a.k.a. pathname expansion, a.k.a. globbing) now
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never matches the special navigational names '.' (current directory)
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and '..' (parent directory). This change makes a pattern like .*
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useful; it now matches all hidden files (dotfiles) in the current
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directory, without the harmful inclusion of '.' and '..'.
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New features in built-in commands:
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- Usage error messages now show the --help/--man self-documentation options.
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- Path-bound built-ins (such as /opt/ast/bin/cat) can now be executed by
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invoking the canonical path, so the following will now work as expected:
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$ /opt/ast/bin/cat --version
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version cat (AT&T Research) 2012-05-31
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- 'command -x' now looks for external commands only, skipping built-ins.
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In addition, its xargs-like functionality no longer freezes the shell on
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Linux and macOS, making it effectively a new feature on these systems.
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- 'redirect' now checks if all arguments are valid redirections before
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performing them. If an error occurs, it issues an error message instead
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of terminating the shell.
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- 'suspend' now refuses to suspend a login shell, as there is probably no
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parent shell to return to and the login session would freeze.
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- 'times' now gives high precision output in a POSIX compliant format.
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- 'typeset' now gives an informative error message if an incompatible
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combination of options is given.
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- 'whence -v/-a' now reports the location of autoloadable functions.
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New features in shell options:
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- A new --globcasedetect shell option is added on OSs where we can
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check for a case-insensitive file system (currently Windows/Cygwin,
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macOS, Linux and QNX 7.0+). When this option is turned on, file name
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generation (globbing), as well as file name tab completion on
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interactive shells, automatically become case-insensitive on file
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systems where the difference between upper and lower case is ignored
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for file names. This is transparently determined for each directory, so
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a path pattern that spans multiple file systems can be part
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case-sensitive and part case-insensitive.
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- A new --nobackslashctrl shell option disables the special escaping
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behaviour of the backslash character in the emacs and vi built-in
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editors. Particularly in the emacs editor, this makes it much easier to
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go backward, insert a forgotten backslash into a command, and then
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continue editing without having your next cursor key replace your
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backslash with garbage. Note that Ctrl+V (or whatever other character
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was set using 'stty lnext') always escapes all control characters in
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either editing mode.
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- A new --posix shell option has been added to ksh 93u+m that makes the
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ksh language more compatible with other shells by following the POSIX
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standard more closely. See the manual page for details. It is enabled by
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default if ksh is invoked as sh, otherwise it is disabled by default.
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- Enhancement to -G/--globstar: symbolic links to directories are now
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followed if they match a normal (non-**) glob pattern. For example, if
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'/lnk' is a symlink to a directory, '/lnk/**' and '/l?k/**' now work as
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you would expect.
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