1 /* Tests of renameat.
2 Copyright (C) 2009-2018 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */
18
19 #include <config.h>
20
21 #include <stdio.h>
22
23 #include "signature.h"
24 SIGNATURE_CHECK (renameat, int, (int, char const *, int, char const *));
25
26 #include <dirent.h>
27 #include <fcntl.h>
28 #include <errno.h>
29 #include <stdbool.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/stat.h>
34
35 #include "filenamecat.h"
36 #include "ignore-value.h"
37 #include "macros.h"
38
39 #define BASE "test-renameat.t"
40
41 #include "test-rename.h"
42
43 static int dfd1 = AT_FDCWD;
44 static int dfd2 = AT_FDCWD;
45
46 /* Wrapper to test renameat like rename. */
47 static int
do_rename(char const * name1,char const * name2)48 do_rename (char const *name1, char const *name2)
49 {
50 return renameat (dfd1, name1, dfd2, name2);
51 }
52
53 int
main(void)54 main (void)
55 {
56 int i;
57 int dfd;
58 char *cwd;
59 int result;
60
61 /* Clean up any trash from prior testsuite runs. */
62 ignore_value (system ("rm -rf " BASE "*"));
63
64 /* Test behaviour for invalid file descriptors. */
65 {
66 errno = 0;
67 ASSERT (renameat (-1, "foo", AT_FDCWD, "bar") == -1);
68 ASSERT (errno == EBADF);
69 }
70 {
71 close (99);
72 errno = 0;
73 ASSERT (renameat (99, "foo", AT_FDCWD, "bar") == -1);
74 ASSERT (errno == EBADF);
75 }
76 ASSERT (close (creat (BASE "oo", 0600)) == 0);
77 {
78 errno = 0;
79 ASSERT (renameat (AT_FDCWD, BASE "oo", -1, "bar") == -1);
80 ASSERT (errno == EBADF);
81 }
82 {
83 errno = 0;
84 ASSERT (renameat (AT_FDCWD, BASE "oo", 99, "bar") == -1);
85 ASSERT (errno == EBADF);
86 }
87 ASSERT (unlink (BASE "oo") == 0);
88
89 /* Test basic rename functionality, using current directory. */
90 result = test_rename (do_rename, false);
91 dfd1 = open (".", O_RDONLY);
92 ASSERT (0 <= dfd1);
93 ASSERT (test_rename (do_rename, false) == result);
94 dfd2 = dfd1;
95 ASSERT (test_rename (do_rename, false) == result);
96 dfd1 = AT_FDCWD;
97 ASSERT (test_rename (do_rename, false) == result);
98 ASSERT (close (dfd2) == 0);
99
100 /* Create locations to manipulate. */
101 ASSERT (mkdir (BASE "sub1", 0700) == 0);
102 ASSERT (mkdir (BASE "sub2", 0700) == 0);
103 dfd = creat (BASE "00", 0600);
104 ASSERT (0 <= dfd);
105 ASSERT (close (dfd) == 0);
106 cwd = getcwd (NULL, 0);
107 ASSERT (cwd);
108
109 dfd = open (BASE "sub1", O_RDONLY);
110 ASSERT (0 <= dfd);
111 ASSERT (chdir (BASE "sub2") == 0);
112
113 /* There are 16 possible scenarios, based on whether an fd is
114 AT_FDCWD or real, and whether a file is absolute or relative.
115
116 To ensure that we test all of the code paths (rather than
117 triggering early normalization optimizations), we use a loop to
118 repeatedly rename a file in the parent directory, use an fd open
119 on subdirectory 1, all while executing in subdirectory 2; all
120 relative names are thus given with a leading "../". Finally, the
121 last scenario (two relative paths given, neither one AT_FDCWD)
122 has two paths, based on whether the two fds are equivalent, so we
123 do the other variant after the loop. */
124 for (i = 0; i < 16; i++)
125 {
126 int fd1 = (i & 8) ? dfd : AT_FDCWD;
127 char *file1 = file_name_concat ((i & 4) ? ".." : cwd, BASE "xx", NULL);
128 int fd2 = (i & 2) ? dfd : AT_FDCWD;
129 char *file2 = file_name_concat ((i & 1) ? ".." : cwd, BASE "xx", NULL);
130
131 ASSERT (sprintf (strchr (file1, '\0') - 2, "%02d", i) == 2);
132 ASSERT (sprintf (strchr (file2, '\0') - 2, "%02d", i + 1) == 2);
133 ASSERT (renameat (fd1, file1, fd2, file2) == 0);
134 free (file1);
135 free (file2);
136 }
137 dfd2 = open ("..", O_RDONLY);
138 ASSERT (0 <= dfd2);
139 ASSERT (renameat (dfd, "../" BASE "16", dfd2, BASE "17") == 0);
140 ASSERT (close (dfd2) == 0);
141
142 /* Now we change back to the parent directory, and set dfd to ".";
143 using dfd in remaining tests will expose any bugs if emulation
144 via /proc/self/fd doesn't check for empty names. */
145 ASSERT (chdir ("..") == 0);
146 ASSERT (close (dfd) == 0);
147 dfd = open (".", O_RDONLY);
148 ASSERT (0 <= dfd);
149
150 ASSERT (close (creat (BASE "sub2/file", 0600)) == 0);
151 errno = 0;
152 ASSERT (renameat (dfd, BASE "sub1", dfd, BASE "sub2") == -1);
153 ASSERT (errno == EEXIST || errno == ENOTEMPTY);
154 ASSERT (unlink (BASE "sub2/file") == 0);
155 errno = 0;
156 ASSERT (renameat (dfd, BASE "sub2", dfd, BASE "sub1/.") == -1);
157 ASSERT (errno == EINVAL || errno == EISDIR || errno == EBUSY
158 || errno == ENOTEMPTY || errno == EEXIST
159 || errno == ENOENT /* WSL */);
160 errno = 0;
161 ASSERT (renameat (dfd, BASE "sub2/.", dfd, BASE "sub1") == -1);
162 ASSERT (errno == EINVAL || errno == EBUSY || errno == EEXIST
163 || errno == ENOENT /* WSL */);
164 errno = 0;
165 ASSERT (renameat (dfd, BASE "17", dfd, BASE "sub1") == -1);
166 ASSERT (errno == EISDIR);
167 errno = 0;
168 ASSERT (renameat (dfd, BASE "nosuch", dfd, BASE "18") == -1);
169 ASSERT (errno == ENOENT);
170 errno = 0;
171 ASSERT (renameat (dfd, "", dfd, BASE "17") == -1);
172 ASSERT (errno == ENOENT);
173 errno = 0;
174 ASSERT (renameat (dfd, BASE "17", dfd, "") == -1);
175 ASSERT (errno == ENOENT);
176 errno = 0;
177 ASSERT (renameat (dfd, BASE "sub2", dfd, BASE "17") == -1);
178 ASSERT (errno == ENOTDIR);
179 errno = 0;
180 ASSERT (renameat (dfd, BASE "17/", dfd, BASE "18") == -1);
181 ASSERT (errno == ENOTDIR);
182 errno = 0;
183 ASSERT (renameat (dfd, BASE "17", dfd, BASE "18/") == -1);
184 ASSERT (errno == ENOTDIR || errno == ENOENT);
185
186 /* Finally, make sure we can overwrite existing files. */
187 ASSERT (close (creat (BASE "sub2/file", 0600)) == 0);
188 errno = 0;
189 ASSERT (renameat (dfd, BASE "sub2", dfd, BASE "sub1") == 0);
190 ASSERT (renameat (dfd, BASE "sub1/file", dfd, BASE "17") == 0);
191
192 /* Cleanup. */
193 ASSERT (close (dfd) == 0);
194 errno = 0;
195 ASSERT (unlink (BASE "sub1/file") == -1);
196 ASSERT (errno == ENOENT);
197 ASSERT (unlink (BASE "17") == 0);
198 ASSERT (rmdir (BASE "sub1") == 0);
199 errno = 0;
200 ASSERT (rmdir (BASE "sub2") == -1);
201 ASSERT (errno == ENOENT);
202 free (cwd);
203
204 if (result)
205 fputs ("skipping test: symlinks not supported on this file system\n",
206 stderr);
207 return result;
208 }
209