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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
0999c8ad RC |
2 | |
3 | #include <fcntl.h> | |
4 | #include <unistd.h> | |
5 | ||
6 | #include "alloc-util.h" | |
7 | #include "fd-util.h" | |
8 | #include "fileio.h" | |
9 | #include "macro.h" | |
aa11e28b LP |
10 | #include "path-util.h" |
11 | #include "process-util.h" | |
a548e14d LP |
12 | #include "random-util.h" |
13 | #include "string-util.h" | |
6d7c4033 | 14 | #include "tests.h" |
e4de7287 LP |
15 | #include "tmpfile-util.h" |
16 | #include "util.h" | |
0999c8ad RC |
17 | |
18 | static void test_close_many(void) { | |
19 | int fds[3]; | |
20 | char name0[] = "/tmp/test-close-many.XXXXXX"; | |
21 | char name1[] = "/tmp/test-close-many.XXXXXX"; | |
22 | char name2[] = "/tmp/test-close-many.XXXXXX"; | |
23 | ||
646853bd TM |
24 | fds[0] = mkostemp_safe(name0); |
25 | fds[1] = mkostemp_safe(name1); | |
26 | fds[2] = mkostemp_safe(name2); | |
0999c8ad RC |
27 | |
28 | close_many(fds, 2); | |
29 | ||
30 | assert_se(fcntl(fds[0], F_GETFD) == -1); | |
31 | assert_se(fcntl(fds[1], F_GETFD) == -1); | |
32 | assert_se(fcntl(fds[2], F_GETFD) >= 0); | |
33 | ||
34 | safe_close(fds[2]); | |
35 | ||
36 | unlink(name0); | |
37 | unlink(name1); | |
38 | unlink(name2); | |
39 | } | |
40 | ||
41 | static void test_close_nointr(void) { | |
42 | char name[] = "/tmp/test-test-close_nointr.XXXXXX"; | |
43 | int fd; | |
44 | ||
646853bd | 45 | fd = mkostemp_safe(name); |
0999c8ad RC |
46 | assert_se(fd >= 0); |
47 | assert_se(close_nointr(fd) >= 0); | |
48 | assert_se(close_nointr(fd) < 0); | |
49 | ||
50 | unlink(name); | |
51 | } | |
52 | ||
53 | static void test_same_fd(void) { | |
54 | _cleanup_close_pair_ int p[2] = { -1, -1 }; | |
55 | _cleanup_close_ int a = -1, b = -1, c = -1; | |
56 | ||
57 | assert_se(pipe2(p, O_CLOEXEC) >= 0); | |
43dc7aa2 | 58 | assert_se((a = fcntl(p[0], F_DUPFD, 3)) >= 0); |
0999c8ad | 59 | assert_se((b = open("/dev/null", O_RDONLY|O_CLOEXEC)) >= 0); |
43dc7aa2 | 60 | assert_se((c = fcntl(a, F_DUPFD, 3)) >= 0); |
0999c8ad RC |
61 | |
62 | assert_se(same_fd(p[0], p[0]) > 0); | |
63 | assert_se(same_fd(p[1], p[1]) > 0); | |
64 | assert_se(same_fd(a, a) > 0); | |
65 | assert_se(same_fd(b, b) > 0); | |
66 | ||
67 | assert_se(same_fd(a, p[0]) > 0); | |
68 | assert_se(same_fd(p[0], a) > 0); | |
69 | assert_se(same_fd(c, p[0]) > 0); | |
70 | assert_se(same_fd(p[0], c) > 0); | |
71 | assert_se(same_fd(a, c) > 0); | |
72 | assert_se(same_fd(c, a) > 0); | |
73 | ||
74 | assert_se(same_fd(p[0], p[1]) == 0); | |
75 | assert_se(same_fd(p[1], p[0]) == 0); | |
76 | assert_se(same_fd(p[0], b) == 0); | |
77 | assert_se(same_fd(b, p[0]) == 0); | |
78 | assert_se(same_fd(p[1], a) == 0); | |
79 | assert_se(same_fd(a, p[1]) == 0); | |
80 | assert_se(same_fd(p[1], b) == 0); | |
81 | assert_se(same_fd(b, p[1]) == 0); | |
82 | ||
83 | assert_se(same_fd(a, b) == 0); | |
84 | assert_se(same_fd(b, a) == 0); | |
85 | } | |
86 | ||
504afd7c ZJS |
87 | static void test_open_serialization_fd(void) { |
88 | _cleanup_close_ int fd = -1; | |
89 | ||
90 | fd = open_serialization_fd("test"); | |
91 | assert_se(fd >= 0); | |
92 | ||
ca9b2b4d | 93 | assert_se(write(fd, "test\n", 5) == 5); |
504afd7c ZJS |
94 | } |
95 | ||
a548e14d LP |
96 | static void test_acquire_data_fd_one(unsigned flags) { |
97 | char wbuffer[196*1024 - 7]; | |
98 | char rbuffer[sizeof(wbuffer)]; | |
99 | int fd; | |
100 | ||
101 | fd = acquire_data_fd("foo", 3, flags); | |
102 | assert_se(fd >= 0); | |
103 | ||
104 | zero(rbuffer); | |
105 | assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 3); | |
106 | assert_se(streq(rbuffer, "foo")); | |
107 | ||
108 | fd = safe_close(fd); | |
109 | ||
110 | fd = acquire_data_fd("", 0, flags); | |
111 | assert_se(fd >= 0); | |
112 | ||
113 | zero(rbuffer); | |
114 | assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 0); | |
115 | assert_se(streq(rbuffer, "")); | |
116 | ||
117 | fd = safe_close(fd); | |
118 | ||
119 | random_bytes(wbuffer, sizeof(wbuffer)); | |
120 | ||
121 | fd = acquire_data_fd(wbuffer, sizeof(wbuffer), flags); | |
122 | assert_se(fd >= 0); | |
123 | ||
124 | zero(rbuffer); | |
125 | assert_se(read(fd, rbuffer, sizeof(rbuffer)) == sizeof(rbuffer)); | |
126 | assert_se(memcmp(rbuffer, wbuffer, sizeof(rbuffer)) == 0); | |
127 | ||
128 | fd = safe_close(fd); | |
129 | } | |
130 | ||
131 | static void test_acquire_data_fd(void) { | |
132 | ||
133 | test_acquire_data_fd_one(0); | |
134 | test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL); | |
135 | test_acquire_data_fd_one(ACQUIRE_NO_MEMFD); | |
136 | test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD); | |
137 | test_acquire_data_fd_one(ACQUIRE_NO_PIPE); | |
138 | test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_PIPE); | |
139 | test_acquire_data_fd_one(ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE); | |
140 | test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE); | |
141 | test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE|ACQUIRE_NO_TMPFILE); | |
142 | } | |
143 | ||
7fe2903c LP |
144 | static void test_fd_move_above_stdio(void) { |
145 | int original_stdin, new_fd; | |
146 | ||
147 | original_stdin = fcntl(0, F_DUPFD, 3); | |
148 | assert_se(original_stdin >= 3); | |
149 | assert_se(close_nointr(0) != EBADF); | |
150 | ||
151 | new_fd = open("/dev/null", O_RDONLY); | |
152 | assert_se(new_fd == 0); | |
153 | ||
154 | new_fd = fd_move_above_stdio(new_fd); | |
155 | assert_se(new_fd >= 3); | |
156 | ||
157 | assert_se(dup(original_stdin) == 0); | |
158 | assert_se(close_nointr(original_stdin) != EBADF); | |
159 | assert_se(close_nointr(new_fd) != EBADF); | |
160 | } | |
161 | ||
aa11e28b LP |
162 | static void test_rearrange_stdio(void) { |
163 | pid_t pid; | |
164 | int r; | |
165 | ||
166 | r = safe_fork("rearrange", FORK_WAIT|FORK_LOG, &pid); | |
167 | assert_se(r >= 0); | |
168 | ||
169 | if (r == 0) { | |
170 | _cleanup_free_ char *path = NULL; | |
171 | char buffer[10]; | |
172 | ||
173 | /* Child */ | |
174 | ||
175 | safe_close(STDERR_FILENO); /* Let's close an fd < 2, to make it more interesting */ | |
176 | ||
177 | assert_se(rearrange_stdio(-1, -1, -1) >= 0); | |
178 | ||
179 | assert_se(fd_get_path(STDIN_FILENO, &path) >= 0); | |
180 | assert_se(path_equal(path, "/dev/null")); | |
181 | path = mfree(path); | |
182 | ||
183 | assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0); | |
184 | assert_se(path_equal(path, "/dev/null")); | |
185 | path = mfree(path); | |
186 | ||
187 | assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0); | |
188 | assert_se(path_equal(path, "/dev/null")); | |
189 | path = mfree(path); | |
190 | ||
191 | safe_close(STDIN_FILENO); | |
192 | safe_close(STDOUT_FILENO); | |
193 | safe_close(STDERR_FILENO); | |
194 | ||
195 | { | |
196 | int pair[2]; | |
197 | assert_se(pipe(pair) >= 0); | |
198 | assert_se(pair[0] == 0); | |
199 | assert_se(pair[1] == 1); | |
200 | assert_se(fd_move_above_stdio(0) == 3); | |
201 | } | |
202 | assert_se(open("/dev/full", O_WRONLY|O_CLOEXEC) == 0); | |
203 | assert_se(acquire_data_fd("foobar", 6, 0) == 2); | |
204 | ||
205 | assert_se(rearrange_stdio(2, 0, 1) >= 0); | |
206 | ||
207 | assert_se(write(1, "x", 1) < 0 && errno == ENOSPC); | |
208 | assert_se(write(2, "z", 1) == 1); | |
209 | assert_se(read(3, buffer, sizeof(buffer)) == 1); | |
210 | assert_se(buffer[0] == 'z'); | |
211 | assert_se(read(0, buffer, sizeof(buffer)) == 6); | |
212 | assert_se(memcmp(buffer, "foobar", 6) == 0); | |
213 | ||
214 | assert_se(rearrange_stdio(-1, 1, 2) >= 0); | |
215 | assert_se(write(1, "a", 1) < 0 && errno == ENOSPC); | |
216 | assert_se(write(2, "y", 1) == 1); | |
217 | assert_se(read(3, buffer, sizeof(buffer)) == 1); | |
218 | assert_se(buffer[0] == 'y'); | |
219 | ||
220 | assert_se(fd_get_path(0, &path) >= 0); | |
221 | assert_se(path_equal(path, "/dev/null")); | |
222 | path = mfree(path); | |
223 | ||
224 | _exit(EXIT_SUCCESS); | |
225 | } | |
226 | } | |
227 | ||
4960ce43 LP |
228 | static void assert_equal_fd(int fd1, int fd2) { |
229 | ||
230 | for (;;) { | |
231 | uint8_t a[4096], b[4096]; | |
232 | ssize_t x, y; | |
233 | ||
234 | x = read(fd1, a, sizeof(a)); | |
235 | assert(x >= 0); | |
236 | ||
237 | y = read(fd2, b, sizeof(b)); | |
238 | assert(y >= 0); | |
239 | ||
240 | assert(x == y); | |
241 | ||
242 | if (x == 0) | |
243 | break; | |
244 | ||
245 | assert(memcmp(a, b, x) == 0); | |
246 | } | |
247 | } | |
248 | ||
249 | static void test_fd_duplicate_data_fd(void) { | |
250 | _cleanup_close_ int fd1 = -1, fd2 = -1; | |
251 | _cleanup_(close_pairp) int sfd[2] = { -1, -1 }; | |
252 | _cleanup_(sigkill_waitp) pid_t pid = -1; | |
253 | uint64_t i, j; | |
254 | int r; | |
255 | ||
256 | fd1 = open("/etc/fstab", O_RDONLY|O_CLOEXEC); | |
257 | if (fd1 >= 0) { | |
258 | ||
259 | fd2 = fd_duplicate_data_fd(fd1); | |
260 | assert_se(fd2 >= 0); | |
261 | ||
262 | assert_se(lseek(fd1, 0, SEEK_SET) == 0); | |
263 | assert_equal_fd(fd1, fd2); | |
264 | } | |
265 | ||
266 | fd1 = safe_close(fd1); | |
267 | fd2 = safe_close(fd2); | |
268 | ||
269 | fd1 = acquire_data_fd("hallo", 6, 0); | |
270 | assert_se(fd1 >= 0); | |
271 | ||
272 | fd2 = fd_duplicate_data_fd(fd1); | |
273 | assert_se(fd2 >= 0); | |
274 | ||
275 | safe_close(fd1); | |
276 | fd1 = acquire_data_fd("hallo", 6, 0); | |
277 | assert_se(fd1 >= 0); | |
278 | ||
279 | assert_equal_fd(fd1, fd2); | |
280 | ||
281 | fd1 = safe_close(fd1); | |
282 | fd2 = safe_close(fd2); | |
283 | ||
284 | assert_se(socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, sfd) >= 0); | |
285 | ||
286 | r = safe_fork("(sd-pipe)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid); | |
287 | assert_se(r >= 0); | |
288 | ||
289 | if (r == 0) { | |
290 | /* child */ | |
291 | ||
292 | sfd[0] = safe_close(sfd[0]); | |
293 | ||
294 | for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++) | |
295 | assert_se(write(sfd[1], &i, sizeof(i)) == sizeof(i)); | |
296 | ||
297 | sfd[1] = safe_close(sfd[1]); | |
298 | ||
299 | _exit(EXIT_SUCCESS); | |
300 | } | |
301 | ||
302 | sfd[1] = safe_close(sfd[1]); | |
303 | ||
304 | fd2 = fd_duplicate_data_fd(sfd[0]); | |
305 | assert_se(fd2 >= 0); | |
306 | ||
307 | for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++) { | |
308 | assert_se(read(fd2, &j, sizeof(j)) == sizeof(j)); | |
309 | assert_se(i == j); | |
310 | } | |
311 | ||
312 | assert_se(read(fd2, &j, sizeof(j)) == 0); | |
313 | } | |
314 | ||
9264cc39 LP |
315 | static void test_read_nr_open(void) { |
316 | log_info("nr-open: %i", read_nr_open()); | |
317 | } | |
318 | ||
0999c8ad | 319 | int main(int argc, char *argv[]) { |
9264cc39 | 320 | |
6d7c4033 | 321 | test_setup_logging(LOG_DEBUG); |
9264cc39 | 322 | |
0999c8ad RC |
323 | test_close_many(); |
324 | test_close_nointr(); | |
325 | test_same_fd(); | |
504afd7c | 326 | test_open_serialization_fd(); |
a548e14d | 327 | test_acquire_data_fd(); |
7fe2903c | 328 | test_fd_move_above_stdio(); |
aa11e28b | 329 | test_rearrange_stdio(); |
4960ce43 | 330 | test_fd_duplicate_data_fd(); |
9264cc39 | 331 | test_read_nr_open(); |
0999c8ad RC |
332 | |
333 | return 0; | |
334 | } |