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Martijn Dekker eee47df423 Fix handling of skipped directories when autoloading functions 
Fix a bug in autoloading functions. Directories in the path search
list which should be skipped (e.g. because they don't exist) did
not interact correctly with autoloaded functions, so that a
function to autoload was not always found.

Details:
https://github.com/att/ast/issues/1454

Fix backported (and cleaned up) from:
3bc58164

src/cmd/ksh93/sh/path.c:
- path_opentype(): Fix the path search loop so that entries marked
  with PATH_SKIP are handled correctly.

src/cmd/ksh93/tests/functions.sh:
- Add regression test verifying an autoloaded function with a PATH
  that triggered the bug.
  The bug in path_opentype() fixed by this commit may affect other
  scenarios but we know it affects autoloaded functions. Hence the
  test for that scenario.

(cherry picked from commit a27903165775309f4f032de5d42ec1785f14cfbc)
2020-06-12 01:45:15 +02:00
bin bin/shtests: fix SHELL=/path/to/ksh assignment argument 2020-06-12 01:45:14 +02:00
docs fix 5 more typos: incorrect "than" 2020-06-12 01:45:13 +02:00
lib/package fix 24 more typos found with the help of codespell 2020-06-12 01:45:15 +02:00
src Fix handling of skipped directories when autoloading functions 2020-06-12 01:45:15 +02:00
.gitignore Rebooting 93u+m 2020-06-12 01:43:13 +02:00
LICENSE.md Create LICENSE.md 2020-02-12 14:03:19 -05:00
NEWS Fix handling of skipped directories when autoloading functions 2020-06-12 01:45:15 +02:00
README.md Rebooting 93u+m 2020-06-12 01:43:13 +02:00
TODO Fix 'test'/'[' exit status >1 on error in arithmetic expression 2020-06-12 01:45:15 +02:00

README.md

KornShell 93u+m

This repository is used to develop bugfixes to the last stable release (93u+ 2012-08-01) of ksh93, formerly developed by AT&T Software Technology (AST). The sources in this repository were forked from the Github AST repository which is no longer under active development.

To see what's fixed, see NEWS and click on commit messages for full details.

To see what's left to fix, see TODO.

Policy

  1. No new features. Bug fixes only.
  2. No major rewrites. No refactoring code that is not fully understood.
  3. No changes in documented behaviour, except if required for compliance with the POSIX shell language standard which David Korn intended for ksh to follow.
  4. No 100% bug compatibility. Broken and undocumented behaviour gets fixed.
  5. No bureaucracy, no formalities. Just fix it, or report it: create issues, send pull requests. Every interested party is invited to contribute.
  6. To help increase everyone's understanding of this code base, fixes and significant changes should be fully documented in commit messages.

Why?

Between 2017 and 2020 there was an ultimately unsuccessful attempt to breathe new life into the KornShell by extensively refactoring the last unstable AST beta version (93v-). While that ksh2020 branch is now abandoned and still has many critical bugs, it also had a lot of bugs fixed. More importantly, the AST issue tracker now contains a lot of documentation on how to fix those bugs, which makes it possible to backport many of them to the last stable release instead.

In February 2020, having concluded the AST 93v- beta was too broken to base new work on, others decided to start a new fork based on the last stable 93u+ 2012-08-01 release. Unfortunately, as of June 2020, the new ksh-community organisation is yet to see any significant activity four months after its bootstrapping. I hope that will change; I am ready to join efforts with them at any time, as well as anyone else who wants to contribute.

The last stable ksh93 release from 2012 is the least buggy release currently available, but it still has many serious bugs. So it is well past time to start fixing those bugs, leave the rest of the code alone, and get an improved release out there.

Build

After cloning this repo, cd to the top directory of it and run:

./bin/package make

If you have trouble or want to tune the binaries, you may pass additional compiler and linker flags by appending it to the command shown above. E.g.:

./bin/package make \
    SHELL=/bin/bash CCFLAGS="-xc99 -D_XPG6 -m64 -xO4" LDFLAGS="-m64"

For more information run

        bin/package help

Many other commands in this repo self-document via the --help, --man and --html options; those that do have no separate manual page.

Test

After compiling, you can run the regression tests. Start by reading the information printed by:

./bin/shtests --man