When there is no procfs support, the /proc is not mountable, but the /proc directory has been created in the prepare() stage and therefore, the checking of /proc in the run_syscall() stage will be always true and at last will fail all of the procfs dependent test cases.
To solve this issue, one method is checking /proc/self instead of /proc, another one is removing the /proc directory completely (when there is really no procfs support), we apply the second method to avoid mislead the users.
Signed-off-by: Zhangjin Wu falcon@tinylab.org --- tools/testing/selftests/nolibc/nolibc-test.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 9673c338d42e..e5a218ef8a2d 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -928,8 +928,11 @@ 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;