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Fix crash in backtick comsubs with job control on (rhbz#825520)

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This imports another fix from Red Hat/Fedora. Original patch:
642af4d6/f/ksh-20120801-crash.patch

src/cmd/ksh93/include/jobs.h,
src/cmd/ksh93/sh/jobs.c,
src/cmd/ksh93/sh/subshell.c,
src/cmd/ksh93/sh/xec.c:
- Import the Red Hat fix with these differences:
  - Rename the 'hack1_waitall' variable to 'bktick_waitall' and add
    a comment describing what it's for.
  - Remove unused 'pipefail' variable.

src/cmd/ksh93/tests/basic.sh:
- Regression test from reproducer given in the Red Hat bug report.
- Add special handling to SIGKILL it, as it might freeze hard.
This commit is contained in:
Martijn Dekker 2020-09-23 01:56:09 +02:00
parent f7ffaaba17
commit ce68e1be37
7 changed files with 32 additions and 3 deletions
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2
src/cmd/ksh93/sh/xec.c
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@ -1927,7 +1927,7 @@ int sh_exec(register const Shnode_t *t, int flags)
memset(exitval,0,job.waitall*sizeof(int));
}
else
job.waitall |= !pipejob && sh_isstate(SH_MONITOR);
job.waitall |= (job.bktick_waitall || !pipejob && sh_isstate(SH_MONITOR));
job_lock();
nlock++;
do