_PATH_SSH_KEY_SIGN
if (stat(_PATH_SSH_KEY_SIGN, &st) == -1) {
(long)getpid(), _PATH_SSH_KEY_SIGN);
execl(_PATH_SSH_KEY_SIGN, _PATH_SSH_KEY_SIGN, (char *)NULL);
fatal_f("exec(%s): %s", _PATH_SSH_KEY_SIGN,