/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
#include <fcntl.h>
#include <unistd.h>
#include "fd-util.h"
#include "fileio.h"
#include "macro.h"
+#include "path-util.h"
+#include "process-util.h"
#include "random-util.h"
+#include "serialize.h"
#include "string-util.h"
+#include "tests.h"
+#include "tmpfile-util.h"
#include "util.h"
static void test_close_many(void) {
_cleanup_close_ int a = -1, b = -1, c = -1;
assert_se(pipe2(p, O_CLOEXEC) >= 0);
- assert_se((a = dup(p[0])) >= 0);
+ assert_se((a = fcntl(p[0], F_DUPFD, 3)) >= 0);
assert_se((b = open("/dev/null", O_RDONLY|O_CLOEXEC)) >= 0);
- assert_se((c = dup(a)) >= 0);
+ assert_se((c = fcntl(a, F_DUPFD, 3)) >= 0);
assert_se(same_fd(p[0], p[0]) > 0);
assert_se(same_fd(p[1], p[1]) > 0);
fd = open_serialization_fd("test");
assert_se(fd >= 0);
- write(fd, "test\n", 5);
+ assert_se(write(fd, "test\n", 5) == 5);
}
static void test_acquire_data_fd_one(unsigned flags) {
test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE|ACQUIRE_NO_TMPFILE);
}
+static void test_fd_move_above_stdio(void) {
+ int original_stdin, new_fd;
+
+ original_stdin = fcntl(0, F_DUPFD, 3);
+ assert_se(original_stdin >= 3);
+ assert_se(close_nointr(0) != EBADF);
+
+ new_fd = open("/dev/null", O_RDONLY);
+ assert_se(new_fd == 0);
+
+ new_fd = fd_move_above_stdio(new_fd);
+ assert_se(new_fd >= 3);
+
+ assert_se(dup(original_stdin) == 0);
+ assert_se(close_nointr(original_stdin) != EBADF);
+ assert_se(close_nointr(new_fd) != EBADF);
+}
+
+static void test_rearrange_stdio(void) {
+ pid_t pid;
+ int r;
+
+ r = safe_fork("rearrange", FORK_WAIT|FORK_LOG, &pid);
+ assert_se(r >= 0);
+
+ if (r == 0) {
+ _cleanup_free_ char *path = NULL;
+ char buffer[10];
+
+ /* Child */
+
+ safe_close(STDERR_FILENO); /* Let's close an fd < 2, to make it more interesting */
+
+ assert_se(rearrange_stdio(-1, -1, -1) >= 0);
+
+ assert_se(fd_get_path(STDIN_FILENO, &path) >= 0);
+ assert_se(path_equal(path, "/dev/null"));
+ path = mfree(path);
+
+ assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0);
+ assert_se(path_equal(path, "/dev/null"));
+ path = mfree(path);
+
+ assert_se(fd_get_path(STDOUT_FILENO, &path) >= 0);
+ assert_se(path_equal(path, "/dev/null"));
+ path = mfree(path);
+
+ safe_close(STDIN_FILENO);
+ safe_close(STDOUT_FILENO);
+ safe_close(STDERR_FILENO);
+
+ {
+ int pair[2];
+ assert_se(pipe(pair) >= 0);
+ assert_se(pair[0] == 0);
+ assert_se(pair[1] == 1);
+ assert_se(fd_move_above_stdio(0) == 3);
+ }
+ assert_se(open("/dev/full", O_WRONLY|O_CLOEXEC) == 0);
+ assert_se(acquire_data_fd("foobar", 6, 0) == 2);
+
+ assert_se(rearrange_stdio(2, 0, 1) >= 0);
+
+ assert_se(write(1, "x", 1) < 0 && errno == ENOSPC);
+ assert_se(write(2, "z", 1) == 1);
+ assert_se(read(3, buffer, sizeof(buffer)) == 1);
+ assert_se(buffer[0] == 'z');
+ assert_se(read(0, buffer, sizeof(buffer)) == 6);
+ assert_se(memcmp(buffer, "foobar", 6) == 0);
+
+ assert_se(rearrange_stdio(-1, 1, 2) >= 0);
+ assert_se(write(1, "a", 1) < 0 && errno == ENOSPC);
+ assert_se(write(2, "y", 1) == 1);
+ assert_se(read(3, buffer, sizeof(buffer)) == 1);
+ assert_se(buffer[0] == 'y');
+
+ assert_se(fd_get_path(0, &path) >= 0);
+ assert_se(path_equal(path, "/dev/null"));
+ path = mfree(path);
+
+ _exit(EXIT_SUCCESS);
+ }
+}
+
+static void assert_equal_fd(int fd1, int fd2) {
+
+ for (;;) {
+ uint8_t a[4096], b[4096];
+ ssize_t x, y;
+
+ x = read(fd1, a, sizeof(a));
+ assert(x >= 0);
+
+ y = read(fd2, b, sizeof(b));
+ assert(y >= 0);
+
+ assert(x == y);
+
+ if (x == 0)
+ break;
+
+ assert(memcmp(a, b, x) == 0);
+ }
+}
+
+static void test_fd_duplicate_data_fd(void) {
+ _cleanup_close_ int fd1 = -1, fd2 = -1;
+ _cleanup_(close_pairp) int sfd[2] = { -1, -1 };
+ _cleanup_(sigkill_waitp) pid_t pid = -1;
+ uint64_t i, j;
+ int r;
+
+ fd1 = open("/etc/fstab", O_RDONLY|O_CLOEXEC);
+ if (fd1 >= 0) {
+
+ fd2 = fd_duplicate_data_fd(fd1);
+ assert_se(fd2 >= 0);
+
+ assert_se(lseek(fd1, 0, SEEK_SET) == 0);
+ assert_equal_fd(fd1, fd2);
+ }
+
+ fd1 = safe_close(fd1);
+ fd2 = safe_close(fd2);
+
+ fd1 = acquire_data_fd("hallo", 6, 0);
+ assert_se(fd1 >= 0);
+
+ fd2 = fd_duplicate_data_fd(fd1);
+ assert_se(fd2 >= 0);
+
+ safe_close(fd1);
+ fd1 = acquire_data_fd("hallo", 6, 0);
+ assert_se(fd1 >= 0);
+
+ assert_equal_fd(fd1, fd2);
+
+ fd1 = safe_close(fd1);
+ fd2 = safe_close(fd2);
+
+ assert_se(socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, sfd) >= 0);
+
+ r = safe_fork("(sd-pipe)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid);
+ assert_se(r >= 0);
+
+ if (r == 0) {
+ /* child */
+
+ sfd[0] = safe_close(sfd[0]);
+
+ for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++)
+ assert_se(write(sfd[1], &i, sizeof(i)) == sizeof(i));
+
+ sfd[1] = safe_close(sfd[1]);
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ sfd[1] = safe_close(sfd[1]);
+
+ fd2 = fd_duplicate_data_fd(sfd[0]);
+ assert_se(fd2 >= 0);
+
+ for (i = 0; i < 1536*1024 / sizeof(uint64_t); i++) {
+ assert_se(read(fd2, &j, sizeof(j)) == sizeof(j));
+ assert_se(i == j);
+ }
+
+ assert_se(read(fd2, &j, sizeof(j)) == 0);
+}
+
+static void test_read_nr_open(void) {
+ log_info("nr-open: %i", read_nr_open());
+}
+
int main(int argc, char *argv[]) {
+
+ test_setup_logging(LOG_DEBUG);
+
test_close_many();
test_close_nointr();
test_same_fd();
test_open_serialization_fd();
test_acquire_data_fd();
+ test_fd_move_above_stdio();
+ test_rearrange_stdio();
+ test_fd_duplicate_data_fd();
+ test_read_nr_open();
return 0;
}
projects / thirdparty / systemd.git / blobdiff