1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2007
4 * 27/12/07 Rishikesh K Rajak <[email protected]>
5 * Copyright (C) 2022 SUSE LLC Andrea Cervesato <[email protected]>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Clone a process with CLONE_NEWPID flag and check:
12 *
13 * - child process ID must be 1
14 * - parent process ID must be 0
15 */
16
17 #include "tst_test.h"
18 #include "lapi/sched.h"
19
child_func(void)20 static void child_func(void)
21 {
22 pid_t cpid, ppid;
23
24 cpid = tst_getpid();
25 ppid = getppid();
26
27 TST_EXP_EQ_LI(cpid, 1);
28 TST_EXP_EQ_LI(ppid, 0);
29 }
30
run(void)31 static void run(void)
32 {
33 const struct tst_clone_args args = {
34 .flags = CLONE_NEWPID,
35 .exit_signal = SIGCHLD,
36 };
37
38 if (!SAFE_CLONE(&args)) {
39 child_func();
40 return;
41 }
42 }
43
44 static struct tst_test test = {
45 .test_all = run,
46 .needs_root = 1,
47 .forks_child = 1,
48 .needs_kconfigs = (const char *[]) {
49 "CONFIG_PID_NS",
50 NULL,
51 },
52 };
53