Function posix_directory_sync

src/daemon/ipc.c:1959–1984

}

static bool posix_directory_sync(int dir_fd) {
    if (dir_fd < 0) {
        return false;
    }
    int result;
    do {
        result = fsync(dir_fd);
    } while (result != 0 && errno == EINTR);
    if (result == 0) {
        return true;
    }

    int sync_error = errno;
    bool unsupported = sync_error == EINVAL;
#ifdef ENOTSUP
    unsupported = unsupported || sync_error == ENOTSUP;
#endif
#ifdef EOPNOTSUPP
    unsupported = unsupported || sync_error == EOPNOTSUPP;
#endif
    /* Some POSIX filesystems, including Darwin filesystems, do not expose a
     * directory-sync operation. Record contents are still fsynced before
     * publication, and the recovery state machine accepts either atomic
     * namespace outcome after a crash. */
    return unsupported;
}

static bool posix_socket_record_temp_name(const char *record_name, char temp_name[NAME_MAX + 1]) {
    if (!record_name || !temp_name) {