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Fix bugs related to 'uname -d' in the 'uname' builtin (#251)

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This commit fixes a bug in the ksh uname builtin's -d option that could
change the output of -o (I was only able to reproduce this on Linux):
    $ builtin uname
    $ uname -o
    GNU/Linux
    $ uname -d
    (none)
    $ uname -o
    (none)
I identified this patch from ksh2020 as a fix for this bug:
<https://github.com/att/ast/pull/1187>
The linked patch was meant to fix a crash in 'uname -d', although I've
had no luck reproducing it: <https://github.com/att/ast/issues/1184>

src/lib/libcmd/uname.c:
- Pass correct buffer to getdomainname() while executing uname -d.

src/cmd/ksh93/tests/builtins.sh:
- Add a regression test for the reported 'uname -d' crash.
- Add a regression test for the output of 'uname -o' after 'uname -d'.
- To handle potential crashes when running the regression tests in older
  versions of ksh, fork the command substitutions that run 'uname -d'.
This commit is contained in:
Johnothan King 2021-04-04 14:18:43 -07:00 • committed by GitHub
parent ca2443b58c
commit 56913f8c2a
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4 changed files with 30 additions and 2 deletions
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2
src/cmd/ksh93/include/version.h
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@ -20,7 +20,7 @@
#define SH_RELEASE_FORK "93u+m" /* only change if you develop a new ksh93 fork */
#define SH_RELEASE_SVER "1.0.0-alpha" /* semantic version number: https://semver.org */
#define SH_RELEASE_DATE "2021-03-31" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_DATE "2021-04-03" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_CPYR "(c) 2020-2021 Contributors to ksh " SH_RELEASE_FORK
/* Scripts sometimes field-split ${.sh.version}, so don't change amount of whitespace. */