wwerror
error("Can't open help window: %s.", wwerror());
error("Can't open string window: %s.", wwerror());
error("Can't open time window: %s.", wwerror());
error("Can't open listing window: %s.", wwerror());
error("Can't open variable window: %s.", wwerror());
error("Can't open alias window: %s.", wwerror());
error("Can't open statistics window: %s.", wwerror());
errx(1, "%s", wwerror());
warnx("%s.\r", wwerror());
warnx("%s.\r", wwerror());
warnx("%s.\r", wwerror());
error("Can't stop output: %s.", wwerror());
error("Can't start output: %s.", wwerror());
error("Can't resize window: %s.", wwerror());
error("Can't open window: %s.", wwerror());
error("Can't execute %s: %s.", shf, wwerror());
wwerror(void);