fd-util: add new helper call fd_duplicate_data_fd()

[elogind.git] / src / test / test-fd-util.c

diff --git a/src/test/test-fd-util.c b/src/test/test-fd-util.c
index f266e580b33309be32b4fce636032de2f0f9583b..edcb8ab7510d5dd4a850bf38b707fa5b1869b548 100644 (file)
--- a/src/test/test-fd-util.c
+++ b/src/test/test-fd-util.c
@@ -230,6 +230,93 @@ static void test_rearrange_stdio(void) {
         }
 }
 
+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);
+}
+
 int main(int argc, char *argv[]) {
         test_close_many();
         test_close_nointr();
@@ -240,6 +327,7 @@ int main(int argc, char *argv[]) {
         test_acquire_data_fd();
         test_fd_move_above_stdio();
         test_rearrange_stdio();
+        test_fd_duplicate_data_fd();
 
         return 0;
 }