1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2001
4 * Author: Wayne Boyer
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
14 * the GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /*
22 * Test that fchmod() fails and sets the proper errno values.
23 */
24
25 #ifndef _GNU_SOURCE
26 # define _GNU_SOURCE
27 #endif
28
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <fcntl.h>
35 #include <errno.h>
36 #include <string.h>
37 #include <signal.h>
38 #include <unistd.h>
39 #include <grp.h>
40 #include <pwd.h>
41 #include <sys/mount.h>
42
43 #include "test.h"
44 #include "safe_macros.h"
45
46 static int fd1;
47 static int fd2;
48 static int fd3;
49 static const char *device;
50 static int mount_flag;
51
52 static struct test_case_t {
53 char *name;
54 int *fd;
55 int mode;
56 int exp_errno;
57 } test_cases[] = {
58 {"EPERM", &fd1, 0644, EPERM},
59 {"EBADF", &fd2, 0644, EBADF},
60 {"EROFS", &fd3, 0644, EROFS},
61 };
62
63 char *TCID = "fchmod06";
64 int TST_TOTAL = ARRAY_SIZE(test_cases);
65
66 static void setup(void);
67 static void cleanup(void);
68
main(int ac,char ** av)69 int main(int ac, char **av)
70 {
71 int lc;
72 int i;
73
74 tst_parse_opts(ac, av, NULL, NULL);
75
76 setup();
77
78 for (lc = 0; TEST_LOOPING(lc); lc++) {
79
80 tst_count = 0;
81
82 for (i = 0; i < TST_TOTAL; i++) {
83
84 TEST(fchmod(*test_cases[i].fd, test_cases[i].mode));
85
86 if (TEST_RETURN == -1) {
87 if (TEST_ERRNO == test_cases[i].exp_errno) {
88 tst_resm(TPASS | TTERRNO,
89 "fchmod: test %s success",
90 test_cases[i].name);
91 } else {
92 tst_resm(TFAIL | TTERRNO,
93 "fchmod: test %s FAILED with "
94 "unexpect errno: %d",
95 test_cases[i].name,
96 TEST_ERRNO);
97 }
98 } else {
99 tst_resm(TFAIL,
100 "fchmod: test %s success unexpectly",
101 test_cases[i].name);
102 }
103 }
104
105 }
106
107 cleanup();
108 tst_exit();
109 }
110
setup(void)111 static void setup(void)
112 {
113 struct passwd *ltpuser;
114 const char *fs_type;
115
116 tst_sig(FORK, DEF_HANDLER, cleanup);
117
118 tst_require_root();
119
120 TEST_PAUSE;
121
122 tst_tmpdir();
123
124 fs_type = tst_dev_fs_type();
125 device = tst_acquire_device(cleanup);
126
127 if (!device)
128 tst_brkm(TCONF, cleanup, "Failed to obtain block device");
129
130 tst_mkfs(cleanup, device, fs_type, NULL, NULL);
131
132 SAFE_MKDIR(cleanup, "mntpoint", 0755);
133
134 if (mount(device, "mntpoint", fs_type, 0, NULL) < 0) {
135 tst_brkm(TBROK | TERRNO, cleanup,
136 "mount device:%s failed", device);
137 }
138 mount_flag = 1;
139
140 /* Create a file in the file system, then remount it as read-only */
141 SAFE_TOUCH(cleanup, "mntpoint/tfile_3", 0644, NULL);
142
143 if (mount(device, "mntpoint", fs_type,
144 MS_REMOUNT | MS_RDONLY, NULL) < 0) {
145 tst_brkm(TBROK | TERRNO, cleanup,
146 "mount device:%s failed", device);
147 }
148
149 fd3 = SAFE_OPEN(cleanup, "mntpoint/tfile_3", O_RDONLY);
150
151 fd1 = SAFE_OPEN(cleanup, "tfile_1", O_RDWR | O_CREAT, 0666);
152
153 fd2 = SAFE_OPEN(cleanup, "tfile_2", O_RDWR | O_CREAT, 0666);
154
155 SAFE_CLOSE(cleanup, fd2);
156
157 ltpuser = SAFE_GETPWNAM(cleanup, "nobody");
158
159 SAFE_SETEUID(cleanup, ltpuser->pw_uid);
160 }
161
cleanup(void)162 static void cleanup(void)
163 {
164 if (seteuid(0))
165 tst_resm(TWARN | TERRNO, "seteuid(0) failed");
166
167 if (fd1 > 0 && close(fd1))
168 tst_resm(TWARN | TERRNO, "close(fd1) failed");
169
170 if (fd3 > 0 && close(fd3))
171 tst_resm(TWARN | TERRNO, "close(fd1) failed");
172
173 if (mount_flag && tst_umount("mntpoint") < 0) {
174 tst_brkm(TBROK | TERRNO, NULL,
175 "umount device:%s failed", device);
176 }
177
178 if (device)
179 tst_release_device(device);
180
181 tst_rmdir();
182 }
183