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selftests/nolibc: fix up failures when CONFIG_PROC_FS=n

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For CONFIG_PROC_FS=n, the /proc is not mountable, but the /proc
directory has been created in the prepare() stage whenever /proc is
there or not.

so, the checking of /proc in the run_syscall() stage will be always true
and at last it will fail all of the procfs dependent test cases, which
deviates from the 'cond' check design of the EXPECT_xx macros, without
procfs, these test cases should be skipped instead of failed.

To solve this issue, one method is checking /proc/self instead of /proc,
another method is removing the /proc directory completely for
CONFIG_PROC_FS=n, we apply the second method to avoid misleading the
users.

Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Zhangjin Wu 2023-07-08 02:37:45 +08:00 committed by Willy Tarreau
parent 4e14e84442
commit b8b26108e4
1 changed files with 5 additions and 2 deletions
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7
tools/testing/selftests/nolibc/nolibc-test.c
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@ -1057,8 +1057,11 @@ int prepare(void)
/* try to mount /proc if not mounted. Silently fail otherwise */
if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
if (stat("/proc/self", &stat_buf) != 0)
mount("/proc", "/proc", "proc", 0, 0);
if (stat("/proc/self", &stat_buf) != 0) {
/* If not mountable, remove /proc completely to avoid misuse */
if (mount("none", "/proc", "proc", 0, 0) != 0)
rmdir("/proc");
}
}
return 0;