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[SV 57674] Use the system default PATH if $PATH is not set

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When using execvp() if $PATH is not present in the environment
it will automatically search the system default PATH string.  Emulate
this by passing the system default PATH to find_in_given_path() if
we don't find PATH in the environment.

* src/job.c (child_execute_job): Use confstr(_CS_PATH) if PATH is not
found.
This commit is contained in:
Paul Smith 2020-04-01 01:13:02 -04:00
parent f79bde1a6d
commit 0c326a66c9
2 changed files with 19 additions and 0 deletions
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12
src/job.c
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@ -2381,6 +2381,18 @@ child_execute_job (struct childbase *child, int good_stdin, char **argv)
break;
}
/* execvp() will use a default PATH if none is set; emulate that. */
if (p == NULL)
{
size_t l = confstr (_CS_PATH, NULL, 0);
if (l)
{
char *dp = alloca (l);
confstr (_CS_PATH, dp, l);
p = dp;
}
}
cmd = (char *)find_in_given_path (argv[0], p, 0);
}

7
tests/scripts/misc/general4
View file

@ -118,4 +118,11 @@ all: ; $sname
unlink($sname);
# SV 57674: ensure we use a system default PATH if one is not set
delete $ENV{PATH};
run_make_test(q!
a: ; @echo hi
!,
'', "hi\n");
1;