1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010 Lennart Poettering
11 #include "alloc-util.h"
15 #include "path-util.h"
16 #include "process-util.h"
17 #include "random-util.h"
18 #include "string-util.h"
21 static void test_close_many(void) {
23 char name0[] = "/tmp/test-close-many.XXXXXX";
24 char name1[] = "/tmp/test-close-many.XXXXXX";
25 char name2[] = "/tmp/test-close-many.XXXXXX";
27 fds[0] = mkostemp_safe(name0);
28 fds[1] = mkostemp_safe(name1);
29 fds[2] = mkostemp_safe(name2);
33 assert_se(fcntl(fds[0], F_GETFD) == -1);
34 assert_se(fcntl(fds[1], F_GETFD) == -1);
35 assert_se(fcntl(fds[2], F_GETFD) >= 0);
44 static void test_close_nointr(void) {
45 char name[] = "/tmp/test-test-close_nointr.XXXXXX";
48 fd = mkostemp_safe(name);
50 assert_se(close_nointr(fd) >= 0);
51 assert_se(close_nointr(fd) < 0);
56 #if 0 /// UNNEEDED by elogind
57 static void test_same_fd(void) {
58 _cleanup_close_pair_ int p[2] = { -1, -1 };
59 _cleanup_close_ int a = -1, b = -1, c = -1;
61 assert_se(pipe2(p, O_CLOEXEC) >= 0);
62 assert_se((a = fcntl(p[0], F_DUPFD, 3)) >= 0);
63 assert_se((b = open("/dev/null", O_RDONLY|O_CLOEXEC)) >= 0);
64 assert_se((c = fcntl(a, F_DUPFD, 3)) >= 0);
66 assert_se(same_fd(p[0], p[0]) > 0);
67 assert_se(same_fd(p[1], p[1]) > 0);
68 assert_se(same_fd(a, a) > 0);
69 assert_se(same_fd(b, b) > 0);
71 assert_se(same_fd(a, p[0]) > 0);
72 assert_se(same_fd(p[0], a) > 0);
73 assert_se(same_fd(c, p[0]) > 0);
74 assert_se(same_fd(p[0], c) > 0);
75 assert_se(same_fd(a, c) > 0);
76 assert_se(same_fd(c, a) > 0);
78 assert_se(same_fd(p[0], p[1]) == 0);
79 assert_se(same_fd(p[1], p[0]) == 0);
80 assert_se(same_fd(p[0], b) == 0);
81 assert_se(same_fd(b, p[0]) == 0);
82 assert_se(same_fd(p[1], a) == 0);
83 assert_se(same_fd(a, p[1]) == 0);
84 assert_se(same_fd(p[1], b) == 0);
85 assert_se(same_fd(b, p[1]) == 0);
87 assert_se(same_fd(a, b) == 0);
88 assert_se(same_fd(b, a) == 0);
92 static void test_open_serialization_fd(void) {
93 _cleanup_close_ int fd = -1;
95 fd = open_serialization_fd("test");
98 assert_se(write(fd, "test\n", 5) == 5);
101 static void test_acquire_data_fd_one(unsigned flags) {
102 char wbuffer[196*1024 - 7];
103 char rbuffer[sizeof(wbuffer)];
106 fd = acquire_data_fd("foo", 3, flags);
110 assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 3);
111 assert_se(streq(rbuffer, "foo"));
115 fd = acquire_data_fd("", 0, flags);
119 assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 0);
120 assert_se(streq(rbuffer, ""));
124 random_bytes(wbuffer, sizeof(wbuffer));
126 fd = acquire_data_fd(wbuffer, sizeof(wbuffer), flags);
130 assert_se(read(fd, rbuffer, sizeof(rbuffer)) == sizeof(rbuffer));
131 assert_se(memcmp(rbuffer, wbuffer, sizeof(rbuffer)) == 0);
136 static void test_acquire_data_fd(void) {
138 test_acquire_data_fd_one(0);
139 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL);
140 test_acquire_data_fd_one(ACQUIRE_NO_MEMFD);
141 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD);
142 test_acquire_data_fd_one(ACQUIRE_NO_PIPE);
143 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_PIPE);
144 test_acquire_data_fd_one(ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE);
145 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE);
146 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE|ACQUIRE_NO_TMPFILE);
149 static void test_fd_move_above_stdio(void) {
150 int original_stdin, new_fd;
152 original_stdin = fcntl(0, F_DUPFD, 3);
153 assert_se(original_stdin >= 3);
154 assert_se(close_nointr(0) != EBADF);
156 new_fd = open("/dev/null", O_RDONLY);
157 assert_se(new_fd == 0);
159 new_fd = fd_move_above_stdio(new_fd);
160 assert_se(new_fd >= 3);
162 assert_se(dup(original_stdin) == 0);
163 assert_se(close_nointr(original_stdin) != EBADF);
164 assert_se(close_nointr(new_fd) != EBADF);
167 static void test_rearrange_stdio(void) {
171 r = safe_fork("rearrange", FORK_WAIT|FORK_LOG, &pid);
175 _cleanup_free_ char *path = NULL;
180 safe_close(STDERR_FILENO); /* Let's close an fd < 2, to make it more interesting */
182 assert_se(rearrange_stdio(-1, -1, -1) >= 0);
184 assert_se(fd_get_path(STDIN_FILENO, &path) >= 0);
185 assert_se(path_equal(path, "/dev/null"));
188 assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0);
189 assert_se(path_equal(path, "/dev/null"));
192 assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0);
193 assert_se(path_equal(path, "/dev/null"));
196 safe_close(STDIN_FILENO);
197 safe_close(STDOUT_FILENO);
198 safe_close(STDERR_FILENO);
202 assert_se(pipe(pair) >= 0);
203 assert_se(pair[0] == 0);
204 assert_se(pair[1] == 1);
205 assert_se(fd_move_above_stdio(0) == 3);
207 assert_se(open("/dev/full", O_WRONLY|O_CLOEXEC) == 0);
208 assert_se(acquire_data_fd("foobar", 6, 0) == 2);
210 assert_se(rearrange_stdio(2, 0, 1) >= 0);
212 assert_se(write(1, "x", 1) < 0 && errno == ENOSPC);
213 assert_se(write(2, "z", 1) == 1);
214 assert_se(read(3, buffer, sizeof(buffer)) == 1);
215 assert_se(buffer[0] == 'z');
216 assert_se(read(0, buffer, sizeof(buffer)) == 6);
217 assert_se(memcmp(buffer, "foobar", 6) == 0);
219 assert_se(rearrange_stdio(-1, 1, 2) >= 0);
220 assert_se(write(1, "a", 1) < 0 && errno == ENOSPC);
221 assert_se(write(2, "y", 1) == 1);
222 assert_se(read(3, buffer, sizeof(buffer)) == 1);
223 assert_se(buffer[0] == 'y');
225 assert_se(fd_get_path(0, &path) >= 0);
226 assert_se(path_equal(path, "/dev/null"));
233 static void assert_equal_fd(int fd1, int fd2) {
236 uint8_t a[4096], b[4096];
239 x = read(fd1, a, sizeof(a));
242 y = read(fd2, b, sizeof(b));
250 assert(memcmp(a, b, x) == 0);
254 static void test_fd_duplicate_data_fd(void) {
255 _cleanup_close_ int fd1 = -1, fd2 = -1;
256 _cleanup_(close_pairp) int sfd[2] = { -1, -1 };
257 _cleanup_(sigkill_waitp) pid_t pid = -1;
261 fd1 = open("/etc/fstab", O_RDONLY|O_CLOEXEC);
264 fd2 = fd_duplicate_data_fd(fd1);
267 assert_se(lseek(fd1, 0, SEEK_SET) == 0);
268 assert_equal_fd(fd1, fd2);
271 fd1 = safe_close(fd1);
272 fd2 = safe_close(fd2);
274 fd1 = acquire_data_fd("hallo", 6, 0);
277 fd2 = fd_duplicate_data_fd(fd1);
281 fd1 = acquire_data_fd("hallo", 6, 0);
284 assert_equal_fd(fd1, fd2);
286 fd1 = safe_close(fd1);
287 fd2 = safe_close(fd2);
289 assert_se(socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, sfd) >= 0);
291 r = safe_fork("(sd-pipe)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid);
297 sfd[0] = safe_close(sfd[0]);
299 for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++)
300 assert_se(write(sfd[1], &i, sizeof(i)) == sizeof(i));
302 sfd[1] = safe_close(sfd[1]);
307 sfd[1] = safe_close(sfd[1]);
309 fd2 = fd_duplicate_data_fd(sfd[0]);
312 for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++) {
313 assert_se(read(fd2, &j, sizeof(j)) == sizeof(j));
317 assert_se(read(fd2, &j, sizeof(j)) == 0);
320 static void test_read_nr_open(void) {
321 log_info("nr-open: %i", read_nr_open());
324 int main(int argc, char *argv[]) {
326 log_set_max_level(LOG_DEBUG);
330 #if 0 /// UNNEEDED by elogind
333 test_open_serialization_fd();
334 test_acquire_data_fd();
335 test_fd_move_above_stdio();
336 test_rearrange_stdio();
337 test_fd_duplicate_data_fd();