1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright 2010 Lennart Poettering
9 #include "alloc-util.h"
13 #include "path-util.h"
14 #include "process-util.h"
15 #include "random-util.h"
16 #include "string-util.h"
19 static void test_close_many(void) {
21 char name0[] = "/tmp/test-close-many.XXXXXX";
22 char name1[] = "/tmp/test-close-many.XXXXXX";
23 char name2[] = "/tmp/test-close-many.XXXXXX";
25 fds[0] = mkostemp_safe(name0);
26 fds[1] = mkostemp_safe(name1);
27 fds[2] = mkostemp_safe(name2);
31 assert_se(fcntl(fds[0], F_GETFD) == -1);
32 assert_se(fcntl(fds[1], F_GETFD) == -1);
33 assert_se(fcntl(fds[2], F_GETFD) >= 0);
42 static void test_close_nointr(void) {
43 char name[] = "/tmp/test-test-close_nointr.XXXXXX";
46 fd = mkostemp_safe(name);
48 assert_se(close_nointr(fd) >= 0);
49 assert_se(close_nointr(fd) < 0);
54 #if 0 /// UNNEEDED by elogind
55 static void test_same_fd(void) {
56 _cleanup_close_pair_ int p[2] = { -1, -1 };
57 _cleanup_close_ int a = -1, b = -1, c = -1;
59 assert_se(pipe2(p, O_CLOEXEC) >= 0);
60 assert_se((a = fcntl(p[0], F_DUPFD, 3)) >= 0);
61 assert_se((b = open("/dev/null", O_RDONLY|O_CLOEXEC)) >= 0);
62 assert_se((c = fcntl(a, F_DUPFD, 3)) >= 0);
64 assert_se(same_fd(p[0], p[0]) > 0);
65 assert_se(same_fd(p[1], p[1]) > 0);
66 assert_se(same_fd(a, a) > 0);
67 assert_se(same_fd(b, b) > 0);
69 assert_se(same_fd(a, p[0]) > 0);
70 assert_se(same_fd(p[0], a) > 0);
71 assert_se(same_fd(c, p[0]) > 0);
72 assert_se(same_fd(p[0], c) > 0);
73 assert_se(same_fd(a, c) > 0);
74 assert_se(same_fd(c, a) > 0);
76 assert_se(same_fd(p[0], p[1]) == 0);
77 assert_se(same_fd(p[1], p[0]) == 0);
78 assert_se(same_fd(p[0], b) == 0);
79 assert_se(same_fd(b, p[0]) == 0);
80 assert_se(same_fd(p[1], a) == 0);
81 assert_se(same_fd(a, p[1]) == 0);
82 assert_se(same_fd(p[1], b) == 0);
83 assert_se(same_fd(b, p[1]) == 0);
85 assert_se(same_fd(a, b) == 0);
86 assert_se(same_fd(b, a) == 0);
90 static void test_open_serialization_fd(void) {
91 _cleanup_close_ int fd = -1;
93 fd = open_serialization_fd("test");
96 assert_se(write(fd, "test\n", 5) == 5);
99 static void test_acquire_data_fd_one(unsigned flags) {
100 char wbuffer[196*1024 - 7];
101 char rbuffer[sizeof(wbuffer)];
104 fd = acquire_data_fd("foo", 3, flags);
108 assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 3);
109 assert_se(streq(rbuffer, "foo"));
113 fd = acquire_data_fd("", 0, flags);
117 assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 0);
118 assert_se(streq(rbuffer, ""));
122 random_bytes(wbuffer, sizeof(wbuffer));
124 fd = acquire_data_fd(wbuffer, sizeof(wbuffer), flags);
128 assert_se(read(fd, rbuffer, sizeof(rbuffer)) == sizeof(rbuffer));
129 assert_se(memcmp(rbuffer, wbuffer, sizeof(rbuffer)) == 0);
134 static void test_acquire_data_fd(void) {
136 test_acquire_data_fd_one(0);
137 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL);
138 test_acquire_data_fd_one(ACQUIRE_NO_MEMFD);
139 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD);
140 test_acquire_data_fd_one(ACQUIRE_NO_PIPE);
141 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_PIPE);
142 test_acquire_data_fd_one(ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE);
143 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE);
144 test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE|ACQUIRE_NO_TMPFILE);
147 static void test_fd_move_above_stdio(void) {
148 int original_stdin, new_fd;
150 original_stdin = fcntl(0, F_DUPFD, 3);
151 assert_se(original_stdin >= 3);
152 assert_se(close_nointr(0) != EBADF);
154 new_fd = open("/dev/null", O_RDONLY);
155 assert_se(new_fd == 0);
157 new_fd = fd_move_above_stdio(new_fd);
158 assert_se(new_fd >= 3);
160 assert_se(dup(original_stdin) == 0);
161 assert_se(close_nointr(original_stdin) != EBADF);
162 assert_se(close_nointr(new_fd) != EBADF);
165 static void test_rearrange_stdio(void) {
169 r = safe_fork("rearrange", FORK_WAIT|FORK_LOG, &pid);
173 _cleanup_free_ char *path = NULL;
178 safe_close(STDERR_FILENO); /* Let's close an fd < 2, to make it more interesting */
180 assert_se(rearrange_stdio(-1, -1, -1) >= 0);
182 assert_se(fd_get_path(STDIN_FILENO, &path) >= 0);
183 assert_se(path_equal(path, "/dev/null"));
186 assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0);
187 assert_se(path_equal(path, "/dev/null"));
190 assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0);
191 assert_se(path_equal(path, "/dev/null"));
194 safe_close(STDIN_FILENO);
195 safe_close(STDOUT_FILENO);
196 safe_close(STDERR_FILENO);
200 assert_se(pipe(pair) >= 0);
201 assert_se(pair[0] == 0);
202 assert_se(pair[1] == 1);
203 assert_se(fd_move_above_stdio(0) == 3);
205 assert_se(open("/dev/full", O_WRONLY|O_CLOEXEC) == 0);
206 assert_se(acquire_data_fd("foobar", 6, 0) == 2);
208 assert_se(rearrange_stdio(2, 0, 1) >= 0);
210 assert_se(write(1, "x", 1) < 0 && errno == ENOSPC);
211 assert_se(write(2, "z", 1) == 1);
212 assert_se(read(3, buffer, sizeof(buffer)) == 1);
213 assert_se(buffer[0] == 'z');
214 assert_se(read(0, buffer, sizeof(buffer)) == 6);
215 assert_se(memcmp(buffer, "foobar", 6) == 0);
217 assert_se(rearrange_stdio(-1, 1, 2) >= 0);
218 assert_se(write(1, "a", 1) < 0 && errno == ENOSPC);
219 assert_se(write(2, "y", 1) == 1);
220 assert_se(read(3, buffer, sizeof(buffer)) == 1);
221 assert_se(buffer[0] == 'y');
223 assert_se(fd_get_path(0, &path) >= 0);
224 assert_se(path_equal(path, "/dev/null"));
231 static void assert_equal_fd(int fd1, int fd2) {
234 uint8_t a[4096], b[4096];
237 x = read(fd1, a, sizeof(a));
240 y = read(fd2, b, sizeof(b));
248 assert(memcmp(a, b, x) == 0);
252 static void test_fd_duplicate_data_fd(void) {
253 _cleanup_close_ int fd1 = -1, fd2 = -1;
254 _cleanup_(close_pairp) int sfd[2] = { -1, -1 };
255 _cleanup_(sigkill_waitp) pid_t pid = -1;
259 fd1 = open("/etc/fstab", O_RDONLY|O_CLOEXEC);
262 fd2 = fd_duplicate_data_fd(fd1);
265 assert_se(lseek(fd1, 0, SEEK_SET) == 0);
266 assert_equal_fd(fd1, fd2);
269 fd1 = safe_close(fd1);
270 fd2 = safe_close(fd2);
272 fd1 = acquire_data_fd("hallo", 6, 0);
275 fd2 = fd_duplicate_data_fd(fd1);
279 fd1 = acquire_data_fd("hallo", 6, 0);
282 assert_equal_fd(fd1, fd2);
284 fd1 = safe_close(fd1);
285 fd2 = safe_close(fd2);
287 assert_se(socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, sfd) >= 0);
289 r = safe_fork("(sd-pipe)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid);
295 sfd[0] = safe_close(sfd[0]);
297 for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++)
298 assert_se(write(sfd[1], &i, sizeof(i)) == sizeof(i));
300 sfd[1] = safe_close(sfd[1]);
305 sfd[1] = safe_close(sfd[1]);
307 fd2 = fd_duplicate_data_fd(sfd[0]);
310 for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++) {
311 assert_se(read(fd2, &j, sizeof(j)) == sizeof(j));
315 assert_se(read(fd2, &j, sizeof(j)) == 0);
318 static void test_read_nr_open(void) {
319 log_info("nr-open: %i", read_nr_open());
322 int main(int argc, char *argv[]) {
324 log_set_max_level(LOG_DEBUG);
328 #if 0 /// UNNEEDED by elogind
331 test_open_serialization_fd();
332 test_acquire_data_fd();
333 test_fd_move_above_stdio();
334 test_rearrange_stdio();
335 test_fd_duplicate_data_fd();