diff options
Diffstat (limited to 'src/test/test-fd-util.c')
-rw-r--r-- | src/test/test-fd-util.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/src/test/test-fd-util.c b/src/test/test-fd-util.c new file mode 100644 index 0000000..7a0a2ad --- /dev/null +++ b/src/test/test-fd-util.c @@ -0,0 +1,335 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include <fcntl.h> +#include <unistd.h> + +#include "alloc-util.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) { + int fds[3]; + char name0[] = "/tmp/test-close-many.XXXXXX"; + char name1[] = "/tmp/test-close-many.XXXXXX"; + char name2[] = "/tmp/test-close-many.XXXXXX"; + + fds[0] = mkostemp_safe(name0); + fds[1] = mkostemp_safe(name1); + fds[2] = mkostemp_safe(name2); + + close_many(fds, 2); + + assert_se(fcntl(fds[0], F_GETFD) == -1); + assert_se(fcntl(fds[1], F_GETFD) == -1); + assert_se(fcntl(fds[2], F_GETFD) >= 0); + + safe_close(fds[2]); + + unlink(name0); + unlink(name1); + unlink(name2); +} + +static void test_close_nointr(void) { + char name[] = "/tmp/test-test-close_nointr.XXXXXX"; + int fd; + + fd = mkostemp_safe(name); + assert_se(fd >= 0); + assert_se(close_nointr(fd) >= 0); + assert_se(close_nointr(fd) < 0); + + unlink(name); +} + +static void test_same_fd(void) { + _cleanup_close_pair_ int p[2] = { -1, -1 }; + _cleanup_close_ int a = -1, b = -1, c = -1; + + assert_se(pipe2(p, O_CLOEXEC) >= 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 = fcntl(a, F_DUPFD, 3)) >= 0); + + assert_se(same_fd(p[0], p[0]) > 0); + assert_se(same_fd(p[1], p[1]) > 0); + assert_se(same_fd(a, a) > 0); + assert_se(same_fd(b, b) > 0); + + assert_se(same_fd(a, p[0]) > 0); + assert_se(same_fd(p[0], a) > 0); + assert_se(same_fd(c, p[0]) > 0); + assert_se(same_fd(p[0], c) > 0); + assert_se(same_fd(a, c) > 0); + assert_se(same_fd(c, a) > 0); + + assert_se(same_fd(p[0], p[1]) == 0); + assert_se(same_fd(p[1], p[0]) == 0); + assert_se(same_fd(p[0], b) == 0); + assert_se(same_fd(b, p[0]) == 0); + assert_se(same_fd(p[1], a) == 0); + assert_se(same_fd(a, p[1]) == 0); + assert_se(same_fd(p[1], b) == 0); + assert_se(same_fd(b, p[1]) == 0); + + assert_se(same_fd(a, b) == 0); + assert_se(same_fd(b, a) == 0); +} + +static void test_open_serialization_fd(void) { + _cleanup_close_ int fd = -1; + + fd = open_serialization_fd("test"); + assert_se(fd >= 0); + + assert_se(write(fd, "test\n", 5) == 5); +} + +static void test_acquire_data_fd_one(unsigned flags) { + char wbuffer[196*1024 - 7]; + char rbuffer[sizeof(wbuffer)]; + int fd; + + fd = acquire_data_fd("foo", 3, flags); + assert_se(fd >= 0); + + zero(rbuffer); + assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 3); + assert_se(streq(rbuffer, "foo")); + + fd = safe_close(fd); + + fd = acquire_data_fd("", 0, flags); + assert_se(fd >= 0); + + zero(rbuffer); + assert_se(read(fd, rbuffer, sizeof(rbuffer)) == 0); + assert_se(streq(rbuffer, "")); + + fd = safe_close(fd); + + random_bytes(wbuffer, sizeof(wbuffer)); + + fd = acquire_data_fd(wbuffer, sizeof(wbuffer), flags); + assert_se(fd >= 0); + + zero(rbuffer); + assert_se(read(fd, rbuffer, sizeof(rbuffer)) == sizeof(rbuffer)); + assert_se(memcmp(rbuffer, wbuffer, sizeof(rbuffer)) == 0); + + fd = safe_close(fd); +} + +static void test_acquire_data_fd(void) { + + test_acquire_data_fd_one(0); + test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL); + test_acquire_data_fd_one(ACQUIRE_NO_MEMFD); + test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD); + test_acquire_data_fd_one(ACQUIRE_NO_PIPE); + test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_PIPE); + test_acquire_data_fd_one(ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE); + test_acquire_data_fd_one(ACQUIRE_NO_DEV_NULL|ACQUIRE_NO_MEMFD|ACQUIRE_NO_PIPE); + 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; +} |