1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * Author: Wayne Boyer
5 * Copyright (c) 2018 Cyril Hrubis <chrubis@suse.cz>
6 */
7 /*
8 * Test that fchmod() fails and sets the proper errno values.
9 */
10
11 #ifndef _GNU_SOURCE
12 # define _GNU_SOURCE
13 #endif
14 #include <errno.h>
15 #include <sys/types.h>
16 #include <pwd.h>
17 #include "tst_test.h"
18
19 #define MNT_POINT "mntpoint"
20
21 static int fd1;
22 static int fd2;
23 static int fd3;
24
25 static struct tcase {
26 int *fd;
27 int mode;
28 int exp_errno;
29 } tcases[] = {
30 {&fd1, 0644, EPERM},
31 {&fd2, 0644, EBADF},
32 {&fd3, 0644, EROFS},
33 };
34
verify_fchmod(unsigned int i)35 static void verify_fchmod(unsigned int i)
36 {
37 struct tcase *tc = &tcases[i];
38
39 TEST(fchmod(*tc->fd, tc->mode));
40
41 if (TST_RET != -1) {
42 tst_res(TFAIL, "fchmod() passed unexpectedly (%li)",
43 TST_RET);
44 return;
45 }
46
47 if (TST_ERR == tcases[i].exp_errno) {
48 tst_res(TPASS | TTERRNO, "fchmod() failed expectedly");
49 return;
50 }
51
52 tst_res(TFAIL | TTERRNO,
53 "fchmod() failed unexpectedly, expected %i - %s",
54 TST_ERR, tst_strerrno(TST_ERR));
55 }
56
setup(void)57 static void setup(void)
58 {
59 struct passwd *ltpuser = SAFE_GETPWNAM("nobody");
60
61 fd3 = SAFE_OPEN(MNT_POINT"/file", O_RDONLY);
62 fd1 = SAFE_OPEN("tfile_1", O_RDWR | O_CREAT, 0666);
63 fd2 = SAFE_OPEN("tfile_2", O_RDWR | O_CREAT, 0666);
64 SAFE_CLOSE(fd2);
65
66 SAFE_SETEUID(ltpuser->pw_uid);
67 }
68
cleanup(void)69 static void cleanup(void)
70 {
71 if (fd1 > 0)
72 SAFE_CLOSE(fd1);
73
74 if (fd3 > 0)
75 SAFE_CLOSE(fd3);
76 }
77
78 static struct tst_test test = {
79 .setup = setup,
80 .cleanup = cleanup,
81 .test = verify_fchmod,
82 .tcnt = ARRAY_SIZE(tcases),
83 .needs_root = 1,
84 .needs_rofs = 1,
85 .mntpoint = MNT_POINT,
86 };
87