_PATH_WALL
char buf[sizeof(_PATH_WALL) + sizeof(OPGRENT) + 3];
snprintf(buf, sizeof(buf), "%s -g %s", _PATH_WALL, OPGRENT);
(void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);