1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4 */
5
6 /*\
7 * [Description]
8 *
9 * Test whether parent process id that getppid() returns is out of range.
10 */
11
12 #include <errno.h>
13 #include "tst_test.h"
14
verify_getppid(void)15 static void verify_getppid(void)
16 {
17 pid_t ppid, pid_max;
18
19 SAFE_FILE_SCANF("/proc/sys/kernel/pid_max", "%d\n", &pid_max);
20
21 ppid = getppid();
22 if (ppid > pid_max)
23 tst_res(TFAIL, "getppid() returned %d, out of range!", ppid);
24 else
25 tst_res(TPASS, "getppid() returned %d", ppid);
26 }
27
28 static struct tst_test test = {
29 .test_all = verify_getppid,
30 };
31