1 #include <dirent.h>
2 #include <fcntl.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <unistd.h>
7 #include <sys/stat.h>
8
9
10 static void prepare (void);
11 #define PREPARE(argc, argv) prepare ()
12
13 static int do_test (void);
14 #define TEST_FUNCTION do_test ()
15
16 #include "../test-skeleton.c"
17
18 static int dir_fd;
19
20 static void
prepare(void)21 prepare (void)
22 {
23 size_t test_dir_len = strlen (test_dir);
24 static const char dir_name[] = "/tst-renameat.XXXXXX";
25
26 size_t dirbuflen = test_dir_len + sizeof (dir_name);
27 char *dirbuf = malloc (dirbuflen);
28 if (dirbuf == NULL)
29 {
30 puts ("out of memory");
31 exit (1);
32 }
33
34 snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
35 if (mkdtemp (dirbuf) == NULL)
36 {
37 puts ("cannot create temporary directory");
38 exit (1);
39 }
40
41 add_temp_file (dirbuf);
42
43 dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
44 if (dir_fd == -1)
45 {
46 puts ("cannot open directory");
47 exit (1);
48 }
49 }
50
51
52 static int
do_test(void)53 do_test (void)
54 {
55 /* fdopendir takes over the descriptor, make a copy. */
56 int dupfd = dup (dir_fd);
57 if (dupfd == -1)
58 {
59 puts ("dup failed");
60 return 1;
61 }
62 if (lseek (dupfd, 0, SEEK_SET) != 0)
63 {
64 puts ("1st lseek failed");
65 return 1;
66 }
67
68 /* The directory should be empty safe the . and .. files. */
69 DIR *dir = fdopendir (dupfd);
70 if (dir == NULL)
71 {
72 puts ("fdopendir failed");
73 return 1;
74 }
75 struct dirent64 *d;
76 while ((d = readdir64 (dir)) != NULL)
77 if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
78 {
79 printf ("temp directory contains file \"%s\"\n", d->d_name);
80 return 1;
81 }
82 closedir (dir);
83
84 /* Try to create a file. */
85 int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
86 if (fd == -1)
87 {
88 if (errno == ENOSYS)
89 {
90 puts ("*at functions not supported");
91 return 0;
92 }
93
94 puts ("file creation failed");
95 return 1;
96 }
97 write (fd, "hello", 5);
98 puts ("file created");
99
100 struct stat64 st1;
101 if (fstat64 (fd, &st1) != 0)
102 {
103 puts ("fstat64 failed");
104 return 1;
105 }
106
107 /* Using a descriptor for a normal file must fail. */
108 if (renameat (fd, "some-file", dir_fd, "another-file") == 0)
109 {
110 puts ("renameat with normal file descriptor succeeded");
111 return 1;
112 }
113 if (errno != ENOTDIR)
114 {
115 puts ("error for renameat with normal file descriptor not ENOTDIR");
116 return 1;
117 }
118
119 if (renameat (dir_fd, "some-file", fd, "another-file") == 0)
120 {
121 puts ("2nd renameat with normal file descriptor succeeded");
122 return 1;
123 }
124 if (errno != ENOTDIR)
125 {
126 puts ("error for 2nd renameat with normal file descriptor not ENOTDIR");
127 return 1;
128 }
129
130 close (fd);
131
132 if (renameat (dir_fd, "some-file", dir_fd, "another-file") != 0)
133 {
134 puts ("renameat failed");
135 return 1;
136 }
137
138 struct stat64 st2;
139 if (fstatat64 (dir_fd, "some-file", &st2, 0) == 0)
140 {
141 puts ("fstatat64 succeeded");
142 return 1;
143 }
144 if (errno != ENOENT)
145 {
146 puts ("fstatat64 did not fail with ENOENT");
147 return 1;
148 }
149
150 if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0)
151 {
152 puts ("2nd fstatat64 failed");
153 return 1;
154 }
155
156 if (st1.st_dev != st2.st_dev
157 || st1.st_ino != st2.st_ino
158 || st1.st_size != st2.st_size)
159 {
160 puts ("stat results do not match");
161 return 1;
162 }
163
164 /* Create a file descriptor which is closed again right away. */
165 int dir_fd2 = dup (dir_fd);
166 if (dir_fd2 == -1)
167 {
168 puts ("dup failed");
169 return 1;
170 }
171 close (dir_fd2);
172
173 if (renameat (dir_fd2, "another-file", dir_fd, "some-file") == 0)
174 {
175 puts ("renameat with closed file descriptor succeeded");
176 return 1;
177 }
178 if (errno != EBADF)
179 {
180 puts ("error for renameat with closed file descriptor not EBADF");
181 return 1;
182 }
183
184 if (renameat (dir_fd, "another-file", dir_fd2, "some-file") == 0)
185 {
186 puts ("2nd renameat with closed file descriptor succeeded");
187 return 1;
188 }
189 if (errno != EBADF)
190 {
191 puts ("error for 2nd renameat with closed file descriptor not EBADF");
192 return 1;
193 }
194
195 if (unlinkat (dir_fd, "another-file", 0) != 0)
196 {
197 puts ("unlinkat failed");
198 return 1;
199 }
200
201 if (renameat (-1, "another-file", dir_fd, "some-file") == 0)
202 {
203 puts ("renameat with invalid file descriptor succeeded");
204 return 1;
205 }
206 if (errno != EBADF)
207 {
208 puts ("error for renameat with invalid file descriptor not EBADF");
209 return 1;
210 }
211
212 if (renameat (dir_fd, "another-file", -1, "some-file") == 0)
213 {
214 puts ("2nd renameat with invalid file descriptor succeeded");
215 return 1;
216 }
217 if (errno != EBADF)
218 {
219 puts ("error for 2nd renameat with invalid file descriptor not EBADF");
220 return 1;
221 }
222
223 close (dir_fd);
224
225 return 0;
226 }
227