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libast: fix exec fail on interactive (Solaris patch 315-26773587)

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This upstreams a Solaris patch:
https://github.com/oracle/solaris-userland/blob/master/components/ksh93/patches/315-26773587.patch
which ostensibly fixes this bug filed in Oracle's closed system:
26773587 interactive ksh exec failure in while read loop

src/lib/libast/comp/spawnveg.c:
- If posix_spawn(3) fails with an error other than EPERM, retry,
  but without attributes.
This commit is contained in:
Martijn Dekker 2021-01-09 01:58:23 +00:00
parent 4e67234ae8
commit 7d2bb8fdd9
1 changed files with 4 additions and 1 deletions
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5
src/lib/libast/comp/spawnveg.c
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@ -63,7 +63,10 @@ spawnveg(const char* path, char* const argv[], char* const envv[], pid_t pgid)
goto bad; goto bad;
} }
if (err = posix_spawn(&pid, path, NiL, &attr, argv, envv ? envv : environ)) if (err = posix_spawn(&pid, path, NiL, &attr, argv, envv ? envv : environ))
goto bad; {
if ((err != EPERM) || (err = posix_spawn(&pid, path, NiL, NiL, argv, envv ? envv : environ)))
goto bad;
}
posix_spawnattr_destroy(&attr); posix_spawnattr_destroy(&attr);
#if _lib_posix_spawn < 2 #if _lib_posix_spawn < 2
if (waitpid(pid, &err, WNOHANG|WNOWAIT) == pid && EXIT_STATUS(err) == 127) if (waitpid(pid, &err, WNOHANG|WNOWAIT) == pid && EXIT_STATUS(err) == 127)