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test: add explicit test for bind_remount_one_with_mountinfo()

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This commit is contained in:
Lennart Poettering
2021-03-24 13:45:25 +01:00
parent 10cdbb8372
commit 67d22a3665
1 changed files with 32 additions and 0 deletions
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32
src/test/test-mount-util.c
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@@ -125,11 +125,43 @@ static void test_bind_remount_recursive(void) {
}
}
static void test_bind_remount_one(void) {
pid_t pid;
if (geteuid() != 0) {
(void) log_tests_skipped("not running as root");
return;
}
pid = fork();
assert_se(pid >= 0);
if (pid == 0) {
/* child */
_cleanup_fclose_ FILE *proc_self_mountinfo = NULL;
assert_se(detach_mount_namespace() >= 0);
assert_se(fopen_unlocked("/proc/self/mountinfo", "re", &proc_self_mountinfo) >= 0);
assert_se(bind_remount_one_with_mountinfo("/run", MS_RDONLY, MS_RDONLY, proc_self_mountinfo) >= 0);
assert_se(bind_remount_one_with_mountinfo("/proc/idontexist", MS_RDONLY, MS_RDONLY, proc_self_mountinfo) == -ENOENT);
assert_se(bind_remount_one_with_mountinfo("/proc/self", MS_RDONLY, MS_RDONLY, proc_self_mountinfo) == -EINVAL);
assert_se(bind_remount_one_with_mountinfo("/", MS_RDONLY, MS_RDONLY, proc_self_mountinfo) >= 0);
_exit(EXIT_SUCCESS);
}
assert_se(wait_for_terminate_and_check("test-remount-one", pid, WAIT_LOG) == EXIT_SUCCESS);
}
int main(int argc, char *argv[]) {
test_setup_logging(LOG_DEBUG);
test_mount_option_mangle();
test_bind_remount_recursive();
test_bind_remount_one();
return 0;
}