1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2022 SUSE LLC Avinesh Kumar <[email protected]>
4 * Copyright (c) International Business Machines Corp., 2001
5 * 07/2001 Ported by Wayne Boyer
6 */
7
8 /*\
9 * [Description]
10 *
11 * Verify that setpgid(2) syscall fails with:
12 *
13 * - EINVAL when given pgid is less than 0.
14 * - ESRCH when pid is not the calling process and not a child of
15 * the calling process.
16 * - EPERM when an attempt was made to move a process into a nonexisting
17 * process group.
18 */
19
20 #include <errno.h>
21 #include <unistd.h>
22 #include "tst_test.h"
23
24 static pid_t pgid, pid, ppid, inval_pgid;
25 static pid_t negative_pid = -1;
26
27 static struct tcase {
28 pid_t *pid;
29 pid_t *pgid;
30 int error;
31 } tcases[] = {
32 {&pid, &negative_pid, EINVAL},
33 {&ppid, &pgid, ESRCH},
34 {&pid, &inval_pgid, EPERM}
35 };
36
setup(void)37 static void setup(void)
38 {
39 pid = getpid();
40 ppid = getppid();
41 pgid = getpgrp();
42
43 /*
44 * pid_max would not be in use by another process and guarantees that
45 * it corresponds to an invalid PGID, generating EPERM.
46 */
47 SAFE_FILE_SCANF("/proc/sys/kernel/pid_max", "%d\n", &inval_pgid);
48 }
49
run(unsigned int n)50 static void run(unsigned int n)
51 {
52 struct tcase *tc = &tcases[n];
53
54 TST_EXP_FAIL(setpgid(*tc->pid, *tc->pgid), tc->error,
55 "setpgid(%d, %d)", *tc->pid, *tc->pgid);
56 }
57
58 static struct tst_test test = {
59 .setup = setup,
60 .test = run,
61 .tcnt = ARRAY_SIZE(tcases)
62 };
63