1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4 * Author: Kathy Olmsted
5 * Co-Pilot: Steve Shaw
6 */
7
8 /*\
9 *[Description]
10 *
11 * - fork returns without error
12 * - fork returns the pid of the child
13 */
14
15 #include <errno.h>
16 #include <string.h>
17 #include <stdlib.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include "tst_test.h"
21
22 #define KIDEXIT 42
23 #define FILENAME "childpid"
24
25 static int fd = -1;
26
verify_fork(void)27 static void verify_fork(void)
28 {
29 int kid_status, term_pid, child_pid, pid, ret;
30
31 pid = SAFE_FORK();
32 if (!pid) {
33 SAFE_FILE_PRINTF(FILENAME, "%d", getpid());
34 exit(KIDEXIT);
35 }
36
37 term_pid = SAFE_WAITPID(pid, &kid_status, 0);
38 if (term_pid == pid) {
39 if (!WIFEXITED(kid_status)) {
40 tst_res(TFAIL, "child exited abnormally");
41 return;
42 }
43 ret = WEXITSTATUS(kid_status);
44 if (ret != KIDEXIT)
45 tst_res(TFAIL, "incorrect child status returned %d", ret);
46 else
47 tst_res(TPASS, "correct child status returned %d", ret);
48
49 SAFE_FILE_SCANF(FILENAME, "%d", &child_pid);
50 TST_EXP_EQ_LI(child_pid, pid);
51 } else {
52 tst_res(TFAIL, "waitpid() returns %d instead of expected pid %d",
53 term_pid, pid);
54 }
55
56 tst_reap_children();
57 }
58
setup(void)59 static void setup(void)
60 {
61 fd = SAFE_CREAT(FILENAME, 0700);
62 SAFE_CLOSE(fd);
63 }
64
cleanup(void)65 static void cleanup(void)
66 {
67 if (fd > -1)
68 SAFE_CLOSE(fd);
69 }
70
71 static struct tst_test test = {
72 .setup = setup,
73 .cleanup = cleanup,
74 .needs_tmpdir = 1,
75 .forks_child = 1,
76 .test_all = verify_fork,
77 };
78