1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) Linux Test Project, 2021
4 * Copyright (c) International Business Machines Corp., 2001
5 * 07/2001 Ported by Wayne Boyer
6 */
7
8 /*\
9 * [Description]
10 *
11 * Tests basic error handling of the fcntl syscall.
12 *
13 * - EFAULT when lock is outside your accessible address space
14 * - EINVAL when cmd argument is not recognized by this kernel
15 * - EINVAL when cmd argument is F_SETLK and flock.l_whence is not equal to
16 * SEET_CUR,SEEK_SET,SEEK_END
17 * - EBADF when fd refers to an invalid file descriptor
18 */
19
20 #include <fcntl.h>
21 #include "tst_test.h"
22
23 #define F_BADCMD 999
24
25 static struct flock flock;
26
27 static struct tcase {
28 int fd;
29 int cmd;
30 struct flock *flock;
31 char *desc;
32 int exp_errno;
33 } tcases[] = {
34 {1, F_SETLK, NULL, "F_SETLK", EFAULT},
35 {1, F_BADCMD, &flock, "F_BADCMD", EINVAL},
36 {1, F_SETLK, &flock, "F_SETLK", EINVAL},
37 {-1, F_GETLK, &flock, "F_GETLK", EBADF}
38 };
39
verify_fcntl(unsigned int n)40 static void verify_fcntl(unsigned int n)
41 {
42 struct tcase *tc = &tcases[n];
43
44 if (!tc->flock)
45 tc->flock = tst_get_bad_addr(NULL);
46
47 TST_EXP_FAIL2(fcntl(tc->fd, tc->cmd, tc->flock), tc->exp_errno,
48 "fcntl(%d, %s, flock)", tc->fd, tc->desc);
49 }
50
setup(void)51 static void setup(void)
52 {
53 flock.l_whence = -1;
54 flock.l_type = F_WRLCK;
55 flock.l_start = 0L;
56 flock.l_len = 0L;
57 }
58
59 static struct tst_test test = {
60 .setup = setup,
61 .tcnt = ARRAY_SIZE(tcases),
62 .test = verify_fcntl,
63 };
64