1 /*
2 * Copyright (c) 2014 Fujitsu Ltd.
3 * Author: Zeng Linggang <[email protected]>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17 /*
18 * Test Description:
19 * Verify that,
20 * 1. lchown() fails with -1 return value and sets errno to ELOOP
21 * if too many symbolic links were encountered in resolving path.
22 * 2. lchown() fails with -1 return value and sets errno to EROFS
23 * if the file is on a read-only file system.
24 */
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <unistd.h>
29 #include <fcntl.h>
30 #include <errno.h>
31 #include <string.h>
32 #include <signal.h>
33 #include <grp.h>
34 #include <pwd.h>
35 #include <sys/types.h>
36 #include <sys/stat.h>
37 #include <sys/mman.h>
38 #include <sys/mount.h>
39
40 #include "test.h"
41 #include "safe_macros.h"
42
43 /*
44 * Don't forget to remove USE_LEGACY_COMPAT_16_H from Makefile after
45 * rewriting all tests to the new API.
46 */
47 #include "compat_16.h"
48
49 #define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \
50 S_IXGRP|S_IROTH|S_IXOTH)
51 #define TEST_EROFS "mntpoint"
52
53 static char test_eloop[PATH_MAX] = ".";
54 static const char *device;
55 static int mount_flag;
56
57 static struct test_case_t {
58 char *pathname;
59 int exp_errno;
60 } test_cases[] = {
61 {test_eloop, ELOOP},
62 {TEST_EROFS, EROFS},
63 };
64
65 TCID_DEFINE(lchown03);
66 int TST_TOTAL = ARRAY_SIZE(test_cases);
67
68 static void setup(void);
69 static void lchown_verify(const struct test_case_t *);
70 static void cleanup(void);
71
main(int argc,char * argv[])72 int main(int argc, char *argv[])
73 {
74 int lc;
75 int i;
76
77 tst_parse_opts(argc, argv, NULL, NULL);
78
79 setup();
80
81 for (lc = 0; TEST_LOOPING(lc); lc++) {
82 tst_count = 0;
83 for (i = 0; i < TST_TOTAL; i++)
84 lchown_verify(&test_cases[i]);
85 }
86
87 cleanup();
88 tst_exit();
89 }
90
setup(void)91 static void setup(void)
92 {
93 int i;
94 const char *fs_type;
95
96 tst_require_root();
97
98 tst_sig(NOFORK, DEF_HANDLER, cleanup);
99
100 TEST_PAUSE;
101
102 tst_tmpdir();
103
104 fs_type = tst_dev_fs_type();
105 device = tst_acquire_device(cleanup);
106
107 if (!device)
108 tst_brkm(TCONF, cleanup, "Failed to acquire device");
109
110 SAFE_MKDIR(cleanup, "test_eloop", DIR_MODE);
111 SAFE_SYMLINK(cleanup, "../test_eloop", "test_eloop/test_eloop");
112 for (i = 0; i < 43; i++)
113 strcat(test_eloop, "/test_eloop");
114
115 tst_mkfs(cleanup, device, fs_type, NULL, NULL);
116 SAFE_MKDIR(cleanup, TEST_EROFS, DIR_MODE);
117 SAFE_MOUNT(cleanup, device, TEST_EROFS, fs_type, MS_RDONLY, NULL);
118 mount_flag = 1;
119 }
120
lchown_verify(const struct test_case_t * test)121 static void lchown_verify(const struct test_case_t *test)
122 {
123 UID16_CHECK(geteuid(), "lchown", cleanup)
124 GID16_CHECK(getegid(), "lchown", cleanup)
125
126 TEST(LCHOWN(cleanup, test->pathname, geteuid(), getegid()));
127
128 if (TEST_RETURN != -1) {
129 tst_resm(TFAIL, "lchown() returned %ld, expected -1, errno=%d",
130 TEST_RETURN, test->exp_errno);
131 return;
132 }
133
134 if (TEST_ERRNO == test->exp_errno) {
135 tst_resm(TPASS | TTERRNO, "lchown() failed as expected");
136 } else {
137 tst_resm(TFAIL | TTERRNO,
138 "lchown() failed unexpectedly; expected: %d - %s",
139 test->exp_errno,
140 strerror(test->exp_errno));
141 }
142 }
143
cleanup(void)144 static void cleanup(void)
145 {
146 if (mount_flag && tst_umount(TEST_EROFS) < 0)
147 tst_resm(TWARN | TERRNO, "umount device:%s failed", device);
148
149 if (device)
150 tst_release_device(device);
151
152 tst_rmdir();
153 }
154