1 /*
2 * Copyright (c) International Business Machines Corp., 2006
3 * Author: Yi Yang <yyangcdl@cn.ibm.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19 /*
20 * Description:
21 * Verify that,
22 * 1) renameat(2) returns -1 and sets errno to EBADF if olddirfd
23 * or newdirfd is not a valid file descriptor.
24 * 2) renameat(2) returns -1 and sets errno to ENOTDIR if oldpath
25 * is relative and olddirfd is a file descriptor referring to
26 * a file other than a directory, or similar for newpath and
27 * newdirfd.
28 * 3) renameat(2) returns -1 and sets errno to ELOOP if too many
29 * symbolic links were encountered in resolving oldpath or
30 * newpath.
31 * 4) renameat(2) returns -1 and sets errno to EROFS if the file
32 * is on a read-only file system.
33 * 5) renameat(2) returns -1 and sets errno to EMLINK if oldpath
34 * already has the maximum number of links to it, or it is a
35 * directory and the directory containing newpath has the
36 * maximum number of links.
37 */
38
39 #define _GNU_SOURCE
40
41 #include <sys/types.h>
42 #include <sys/stat.h>
43 #include <sys/time.h>
44 #include <fcntl.h>
45 #include <stdlib.h>
46 #include <errno.h>
47 #include <string.h>
48 #include <signal.h>
49 #include <sys/mount.h>
50
51 #include "test.h"
52 #include "safe_macros.h"
53 #include "lapi/fcntl.h"
54 #include "lapi/renameat.h"
55
56 #define MNTPOINT "mntpoint"
57 #define TESTDIR "testdir"
58 #define NEW_TESTDIR "new_testdir"
59 #define TESTDIR2 "/loopdir"
60 #define NEW_TESTDIR2 "newloopdir"
61 #define TESTDIR3 "emlinkdir"
62 #define NEW_TESTDIR3 "testemlinkdir/new_emlinkdir"
63 #define TESTFILE "testfile"
64 #define NEW_TESTFILE "new_testfile"
65 #define TESTFILE2 "testfile2"
66 #define NEW_TESTFILE2 "new_testfile2"
67 #define TESTFILE3 "testdir/testfile"
68 #define TESTFILE4 "testfile4"
69 #define TESTFILE5 "mntpoint/rofile"
70 #define NEW_TESTFILE5 "mntpoint/newrofile"
71
72 #define DIRMODE (S_IRWXU | S_IRWXG | S_IRWXO)
73 #define FILEMODE (S_IRWXU | S_IRWXG | S_IRWXO)
74
75 static int curfd = AT_FDCWD;
76 static int olddirfd;
77 static int newdirfd;
78 static int badfd = 100;
79 static int filefd;
80 static char absoldpath[256];
81 static char absnewpath[256];
82 static char looppathname[sizeof(TESTDIR2) * 43] = ".";
83 static int max_subdirs;
84
85 static int mount_flag;
86 static const char *device;
87
88 static struct test_case_t {
89 int *oldfdptr;
90 const char *oldpath;
91 int *newfdptr;
92 const char *newpath;
93 int exp_errno;
94 } test_cases[] = {
95 { &curfd, TESTFILE, &curfd, NEW_TESTFILE, 0 },
96 { &olddirfd, TESTFILE, &newdirfd, NEW_TESTFILE, 0 },
97 { &olddirfd, absoldpath, &newdirfd, absnewpath, 0 },
98 { &badfd, TESTFILE, &badfd, NEW_TESTFILE, EBADF },
99 { &filefd, TESTFILE, &filefd, NEW_TESTFILE, ENOTDIR },
100 { &curfd, looppathname, &curfd, NEW_TESTDIR2, ELOOP },
101 { &curfd, TESTFILE5, &curfd, NEW_TESTFILE5, EROFS },
102 { &curfd, TESTDIR3, &curfd, NEW_TESTDIR3, EMLINK },
103 };
104
105 static void setup(void);
106 static void cleanup(void);
107 static void renameat_verify(const struct test_case_t *);
108
109 char *TCID = "renameat01";
110 int TST_TOTAL = ARRAY_SIZE(test_cases);
111
main(int ac,char ** av)112 int main(int ac, char **av)
113 {
114 int i, lc;
115
116 tst_parse_opts(ac, av, NULL, NULL);
117
118 setup();
119
120 for (lc = 0; TEST_LOOPING(lc); lc++) {
121 tst_count = 0;
122
123 for (i = 0; i < TST_TOTAL; i++)
124 renameat_verify(&test_cases[i]);
125 }
126
127 cleanup();
128 tst_exit();
129 }
130
setup(void)131 static void setup(void)
132 {
133 char *tmpdir;
134 const char *fs_type;
135 int i;
136
137 if ((tst_kvercmp(2, 6, 16)) < 0) {
138 tst_brkm(TCONF, NULL,
139 "This test can only run on kernels that are "
140 "2.6.16 and higher");
141 }
142
143 tst_require_root();
144
145 tst_sig(NOFORK, DEF_HANDLER, cleanup);
146
147 tst_tmpdir();
148
149 fs_type = tst_dev_fs_type();
150 device = tst_acquire_device(cleanup);
151
152 if (!device)
153 tst_brkm(TCONF, cleanup, "Failed to obtain block device");
154
155 TEST_PAUSE;
156
157 SAFE_TOUCH(cleanup, TESTFILE, FILEMODE, NULL);
158
159 SAFE_TOUCH(cleanup, TESTFILE2, FILEMODE, NULL);
160 tmpdir = tst_get_tmpdir();
161 sprintf(absoldpath, "%s/%s", tmpdir, TESTFILE2);
162 sprintf(absnewpath, "%s/%s", tmpdir, NEW_TESTFILE2);
163 free(tmpdir);
164
165 SAFE_MKDIR(cleanup, TESTDIR, DIRMODE);
166 SAFE_TOUCH(cleanup, TESTFILE3, FILEMODE, NULL);
167 SAFE_MKDIR(cleanup, NEW_TESTDIR, DIRMODE);
168
169 olddirfd = SAFE_OPEN(cleanup, TESTDIR, O_DIRECTORY);
170 newdirfd = SAFE_OPEN(cleanup, NEW_TESTDIR, O_DIRECTORY);
171
172 filefd = SAFE_OPEN(cleanup, TESTFILE4,
173 O_RDWR | O_CREAT, FILEMODE);
174
175 /*
176 * NOTE: the ELOOP test is written based on that the
177 * consecutive symlinks limit in kernel is hardwired
178 * to 40.
179 */
180 SAFE_MKDIR(cleanup, "loopdir", DIRMODE);
181 SAFE_SYMLINK(cleanup, "../loopdir", "loopdir/loopdir");
182 for (i = 0; i < 43; i++)
183 strcat(looppathname, TESTDIR2);
184
185 tst_mkfs(cleanup, device, fs_type, NULL, NULL);
186 SAFE_MKDIR(cleanup, MNTPOINT, DIRMODE);
187 SAFE_MOUNT(cleanup, device, MNTPOINT, fs_type, 0, NULL);
188 mount_flag = 1;
189 SAFE_TOUCH(cleanup, TESTFILE5, FILEMODE, NULL);
190 SAFE_MOUNT(cleanup, device, MNTPOINT, fs_type, MS_REMOUNT | MS_RDONLY,
191 NULL);
192
193 SAFE_MKDIR(cleanup, TESTDIR3, DIRMODE);
194 max_subdirs = tst_fs_fill_subdirs(cleanup, "testemlinkdir");
195 }
196
renameat_verify(const struct test_case_t * tc)197 static void renameat_verify(const struct test_case_t *tc)
198 {
199 if (tc->exp_errno == EMLINK && max_subdirs == 0) {
200 tst_resm(TCONF, "EMLINK test is not appropriate");
201 return;
202 }
203
204 TEST(renameat(*(tc->oldfdptr), tc->oldpath,
205 *(tc->newfdptr), tc->newpath));
206
207 if (tc->exp_errno && TEST_RETURN != -1) {
208 tst_resm(TFAIL, "renameat() succeeded unexpectedly");
209 return;
210 }
211
212 if (tc->exp_errno == 0 && TEST_RETURN != 0) {
213 tst_resm(TFAIL | TTERRNO, "renameat() failed unexpectedly");
214 return;
215 }
216
217 if (TEST_ERRNO == tc->exp_errno) {
218 tst_resm(TPASS | TTERRNO,
219 "renameat() returned the expected value");
220 } else {
221 tst_resm(TFAIL | TTERRNO,
222 "renameat() got unexpected return value; expected: "
223 "%d - %s", tc->exp_errno,
224 strerror(tc->exp_errno));
225 }
226
227 if (TEST_ERRNO == 0 && renameat(*(tc->newfdptr), tc->newpath,
228 *(tc->oldfdptr), tc->oldpath) < 0) {
229 tst_brkm(TBROK | TERRNO, cleanup, "renameat(%d, %s, "
230 "%d, %s) failed.", *(tc->newfdptr), tc->newpath,
231 *(tc->oldfdptr), tc->oldpath);
232 }
233 }
234
cleanup(void)235 static void cleanup(void)
236 {
237 if (olddirfd > 0 && close(olddirfd) < 0)
238 tst_resm(TWARN | TERRNO, "close olddirfd failed");
239
240 if (newdirfd > 0 && close(newdirfd) < 0)
241 tst_resm(TWARN | TERRNO, "close newdirfd failed");
242
243 if (filefd > 0 && close(filefd) < 0)
244 tst_resm(TWARN | TERRNO, "close filefd failed");
245
246 if (mount_flag && tst_umount(MNTPOINT) < 0)
247 tst_resm(TWARN | TERRNO, "umount %s failed", MNTPOINT);
248
249 if (device)
250 tst_release_device(device);
251
252 tst_rmdir();
253 }
254