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

source code of glibc/io/tst-renameat.c