1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * 03/2001 - Written by Wayne Boyer
5 * Copyright (c) 2018 Cyril Hrubis <chrubis@suse.cz>
6 */
7 /*
8 * Create a message queue, then issue the IPC_SET command to lower the
9 * msg_qbytes value.
10 */
11
12 #include <errno.h>
13
14 #include "tst_test.h"
15 #include "tst_safe_sysv_ipc.h"
16 #include "libnewipc.h"
17
18 static int msg_id = -1;
19 struct msqid_ds orig_buf;
20
verify_msgctl(void)21 static void verify_msgctl(void)
22 {
23 struct msqid_ds buf = orig_buf;
24
25 buf.msg_qbytes -= 1;
26
27 TEST(msgctl(msg_id, IPC_SET, &buf));
28
29 if (TST_RET != 0) {
30 tst_res(TFAIL | TTERRNO, "msgctl(IPC_SET) failed");
31 return;
32 }
33
34 tst_res(TPASS, "msgctl(IPC_SET) msg_qbytes - 1");
35
36 memset(&buf, 0, sizeof(buf));
37 SAFE_MSGCTL(msg_id, IPC_STAT, &buf);
38
39 if (buf.msg_qbytes == orig_buf.msg_qbytes - 1) {
40 tst_res(TPASS, "msg_qbytes = %lu",
41 (unsigned long)buf.msg_qbytes);
42 } else {
43 tst_res(TFAIL, "msg_qbytes = %lu, expected %lu",
44 (unsigned long)buf.msg_qbytes,
45 (unsigned long)orig_buf.msg_qbytes - 1);
46 }
47
48 SAFE_MSGCTL(msg_id, IPC_SET, &orig_buf);
49 }
50
setup(void)51 static void setup(void)
52 {
53 key_t msgkey = GETIPCKEY();
54
55 msg_id = SAFE_MSGGET(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW | 0660);
56
57 SAFE_MSGCTL(msg_id, IPC_STAT, &orig_buf);
58 }
59
cleanup(void)60 static void cleanup(void)
61 {
62 if (msg_id >= 0)
63 SAFE_MSGCTL(msg_id, IPC_RMID, NULL);
64 }
65
66 static struct tst_test test = {
67 .setup = setup,
68 .cleanup = cleanup,
69 .test_all = verify_msgctl,
70 .needs_tmpdir = 1
71 };
72