1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * 07/2001 Ported by Wayne Boyer
5 * Copyright (c) 2023 SUSE LLC Avinesh Kumar <[email protected]>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Verify the basic functionality of getpgid(2) syscall.
12 */
13
14 #include "tst_test.h"
15
get_init_pgid(void)16 static int get_init_pgid(void)
17 {
18 int pgid;
19
20 SAFE_FILE_SCANF("/proc/1/stat", "%*d %*s %*c %*d %d", &pgid);
21 return pgid;
22 }
23
run(void)24 static void run(void)
25 {
26 pid_t pid_1, child_pid, pgid;
27
28 pgid = getpgid(0);
29 tst_res(TINFO, "getpgid(0) in parent = %d", pgid);
30
31 pid_1 = SAFE_FORK();
32 if (!pid_1) {
33 child_pid = getpid();
34
35 tst_res(TINFO, "getpid() in child = %d", child_pid);
36 tst_res(TINFO, "Running getpgid() in child");
37
38 TST_EXP_PID(getpgid(0));
39 TST_EXP_EQ_LI(TST_RET, pgid);
40
41 TST_EXP_PID(getpgid(child_pid), "getpgid(%d)", child_pid);
42 TST_EXP_EQ_LI(TST_RET, pgid);
43
44 TST_EXP_PID(getpgid(pgid), "getpgid(%d)", pgid);
45 TST_EXP_EQ_LI(TST_RET, pgid);
46
47 TST_EXP_PID(getpgid(1));
48 TST_EXP_EQ_LI(TST_RET, get_init_pgid());
49 }
50
51 tst_reap_children();
52 }
53
54 static struct tst_test test = {
55 .test_all = run,
56 .forks_child = 1
57 };
58