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Commit | Line | Data |
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4973cbe5 UD |
1 | #include <dirent.h> |
2 | #include <fcntl.h> | |
ceaa9889 | 3 | #include <stdbool.h> |
4973cbe5 UD |
4 | #include <stdio.h> |
5 | #include <stdlib.h> | |
6 | #include <string.h> | |
7 | #include <unistd.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 | |
21 | prepare (void) | |
22 | { | |
23 | size_t test_dir_len = strlen (test_dir); | |
24 | static const char dir_name[] = "/tst-openat.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 | |
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 | { | |
26cec518 UD |
88 | if (errno == ENOSYS) |
89 | { | |
90 | puts ("*at functions not supported"); | |
91 | return 0; | |
92 | } | |
93 | ||
4973cbe5 UD |
94 | puts ("file creation failed"); |
95 | return 1; | |
96 | } | |
97 | write (fd, "hello", 5); | |
bdc7e223 UD |
98 | |
99 | /* Before closing the file, try using this file descriptor to open | |
100 | another file. This must fail. */ | |
101 | int fd2 = openat (fd, "should-not-work", O_CREAT|O_RDWR, 0666); | |
102 | if (fd2 != -1) | |
103 | { | |
104 | puts ("openat using descriptor for normal file worked"); | |
105 | return 1; | |
106 | } | |
107 | if (errno != ENOTDIR) | |
108 | { | |
109 | puts ("error for openat using descriptor for normal file not ENOTDIR "); | |
110 | return 1; | |
111 | } | |
112 | ||
4973cbe5 UD |
113 | close (fd); |
114 | puts ("file created"); | |
115 | ||
116 | /* fdopendir takes over the descriptor, make a copy. */ | |
117 | dupfd = dup (dir_fd); | |
118 | if (dupfd == -1) | |
119 | { | |
120 | puts ("dup failed"); | |
121 | return 1; | |
122 | } | |
123 | if (lseek (dupfd, 0, SEEK_SET) != 0) | |
124 | { | |
125 | puts ("2nd lseek failed"); | |
126 | return 1; | |
127 | } | |
128 | ||
129 | /* The directory should be empty safe the . and .. files. */ | |
130 | dir = fdopendir (dupfd); | |
131 | if (dir == NULL) | |
132 | { | |
133 | puts ("fdopendir failed"); | |
134 | return 1; | |
135 | } | |
136 | bool seen_file = false; | |
137 | while ((d = readdir64 (dir)) != NULL) | |
138 | if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | |
139 | { | |
140 | if (strcmp (d->d_name, "some-file") != 0) | |
141 | { | |
142 | printf ("temp directory contains file \"%s\"\n", d->d_name); | |
143 | return 1; | |
144 | } | |
145 | ||
146 | seen_file = true; | |
147 | } | |
148 | closedir (dir); | |
149 | ||
150 | if (!seen_file) | |
151 | { | |
152 | puts ("file not created in correct directory"); | |
153 | return 1; | |
154 | } | |
155 | ||
156 | int cwdfd = open (".", O_RDONLY | O_DIRECTORY); | |
157 | if (cwdfd == -1) | |
158 | { | |
159 | puts ("cannot get descriptor for cwd"); | |
160 | return 1; | |
161 | } | |
162 | ||
163 | if (fchdir (dir_fd) != 0) | |
164 | { | |
165 | puts ("1st fchdir failed"); | |
166 | return 1; | |
167 | } | |
168 | ||
169 | if (unlink ("some-file") != 0) | |
170 | { | |
171 | puts ("unlink failed"); | |
172 | return 1; | |
173 | } | |
174 | ||
175 | if (fchdir (cwdfd) != 0) | |
176 | { | |
177 | puts ("2nd fchdir failed"); | |
178 | return 1; | |
179 | } | |
180 | ||
181 | close (dir_fd); | |
182 | close (cwdfd); | |
183 | ||
bdc7e223 UD |
184 | /* With the file descriptor closed the next call must fail. */ |
185 | fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666); | |
186 | if (fd != -1) | |
187 | { | |
188 | puts ("openat using closed descriptor succeeded"); | |
189 | return 1; | |
190 | } | |
191 | if (errno != EBADF) | |
192 | { | |
193 | puts ("openat using closed descriptor did not set EBADF"); | |
194 | return 1; | |
195 | } | |
196 | ||
197 | fd = openat (-1, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666); | |
198 | if (fd != -1) | |
199 | { | |
200 | puts ("openat using -1 descriptor succeeded"); | |
201 | return 1; | |
202 | } | |
203 | if (errno != EBADF) | |
204 | { | |
205 | puts ("openat using -1 descriptor did not set EBADF"); | |
206 | return 1; | |
207 | } | |
208 | ||
4973cbe5 UD |
209 | return 0; |
210 | } |