1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
4 * Author: Vatsal Avasthi
5 *
6 * Test Description:
7 * 1) flock() returns -1 and sets error number to EBADF if the file descriptor
8 * is invalid.
9 * 2) flock() returns -1 and sets error number to EINVAL if the argument
10 * operation does not include LOCK_SH,LOCK_EX,LOCK_UN.
11 * 3) flock() returns -1 and sets error number to EINVAL if an invalid
12 * combination of locking modes is used i.e LOCK_SH with LOCK_EX
13 */
14
15 #include <errno.h>
16 #include <sys/file.h>
17
18 #include "tst_test.h"
19
20 static int badfd = -1;
21 static int fd;
22
23 static struct tcase {
24 int *fd;
25 int operation;
26 int exp_err;
27 } tcases[] = {
28 {&badfd, LOCK_SH, EBADF},
29 {&fd, LOCK_NB, EINVAL},
30 {&fd, LOCK_SH | LOCK_EX, EINVAL},
31 };
32
verify_flock(unsigned n)33 static void verify_flock(unsigned n)
34 {
35 struct tcase *tc = &tcases[n];
36
37 fd = SAFE_OPEN("testfile", O_RDWR);
38 TEST(flock(*tc->fd, tc->operation));
39 if (TST_RET == 0) {
40 tst_res(TFAIL | TTERRNO, "flock() succeeded unexpectedly");
41 SAFE_CLOSE(fd);
42 return;
43 }
44
45 if (tc->exp_err == TST_ERR) {
46 tst_res(TPASS | TTERRNO, "flock() failed expectedly");
47 } else {
48 tst_res(TFAIL | TTERRNO, "flock() failed unexpectedly, "
49 "expected %s", tst_strerrno(tc->exp_err));
50 }
51
52 SAFE_CLOSE(fd);
53 }
54
setup(void)55 static void setup(void)
56 {
57 int fd1;
58
59 fd1 = SAFE_OPEN("testfile", O_CREAT | O_TRUNC | O_RDWR, 0666);
60 SAFE_CLOSE(fd1);
61 }
62
63 static struct tst_test test = {
64 .tcnt = ARRAY_SIZE(tcases),
65 .test = verify_flock,
66 .needs_tmpdir = 1,
67 .setup = setup,
68 };
69