This repository contains the AT&T Software Technology (AST) toolkit
from AT&T Research. As of November 2017 the development focus has
been shifted to the
ksh93) command and supporting code required
to build it.
The non-ksh code of the AST project is no longer being actively maintained. If you are interested in the non-ksh code see below for details on which branches contain the full AST code base.
The project only supports systems where the compiler and underlying hardware is ASCII compatible. This includes Linux on IBM zSeries but not z/OS. The nascent, incomplete, support for EBCDIC has been removed. See issue #742.
Building Korn shell
Building ksh requires the Meson build system. To build ksh execute these commands from the project root directory:
meson build ninja -C build
You can add a
--prefix flag followed by a path to the
meson build command
to specify where the binaries and libraries are installed. The default is
ksh executable, helper libraries and man page can be installed with:
ninja -C build install
Latest builds for Red Hat Enterprise Linux (CentOS) and Fedora can be found in Copr.
Latest builds for openSUSE and Ubuntu can be found in OBS.
See full list of distros that ship packages for current development version.
Contributing changes to the source code
See the contributing guidelines for information about code style, unit tests, and other topics of interest to anyone who wants to modify the source.
Latest results of coverity scan can be viewed here.
Latest test coverage report can be viewed here.
Working with the full AST source
Warning: Running test cases through the legacy test script may wipe out your home directory (See #477). This has been fixed in current development version.
Full AST source code is available under the
2016-01-10-beta branches (see below for more details). Bug fixes to
these branches are welcome but they are otherwise under low maintenance.
The full AST code includes many tools and libraries, like KSH, NMAKE, SFIO, VMALLOC, VCODEX, etc. It also includes efficient replacements for a lot of the POSIX tools. It was designed to be portable across many UNIX systems and also works under UWIN on Microsoft Windows (see UWIN repo on GitHub under att/uwin).
This software is used to build itself, using NMAKE. After cloning this repo, cd to the top directory of it and run:
NOTE: That build command only applies to the legacy branches that include
the entire AST source. It does not apply to the current
master branch that
is focused solely on the
ksh command and uses the Meson build system.
Almost all the tools in this package (including the bin/package script) are self-documenting; run --man (or --html) for the man page for the tool.
(If you were used to the old AST packaging mechanism, on www.research.att.com, this repo is equivalent to downloading the INIT and ast-open packages and running: ./bin/package read on them).
master branch contains
the current development version of ksh93. It only contains source code
for ksh93 and the libraries required to build it.
The 2016-01-10-beta branch contains the last beta release of full AST source code plus a number of patches that were later added on top of it. Changes for the legacy AST project are normally merged to this branch.
The gh-pages branch will probably be removed. It contains files needed to generate the static AST project page hosted by GitHub. See https://help.github.com/articles/what-is-github-pages/ for more info.
This section needs more detail and clarity. The original
said the following:
Each package is covered by one of the license files
where is the license type for the package. At the top of each license file is a URL; the license covers all software that refers to this URL. For details run
bin/package license 
Any archives, distributions or packages made from source or binaries covered by license(s) must contain the corresponding license file(s).
The primary mechanism for interacting with this project is the GitHub project by opening issues and pull-requests and watching the project.
#ksh channel on freenode to discuss about AT&T KornShell and related variants.
ksh93/users is the Gitter chatroom for AT&T KornShell users.
As of 2018-11-01 the AT&T hosted mailing lists no longer respond to email. Note that the precise date the mailing lists stopped working is unknown. That was simply the date it came to our attention. The last known message to both mailing lists was sent on 2018-03-15. Ironically, since you can't unsubscribe, they still send monthly reminders that you are subscribed.