ACMD(guildskill) {
	unsigned char i;
	unsigned short skill_id, skill_lv;
	struct guild *g;
	const struct {
		char skill[3];
		unsigned short skill_id;
	} guild_skill[] = {
		{ "BO", GD_BATTLEORDER,		},
		{ "RG", GD_REGENERATION,	},
		{ "RS", GD_RESTORE,			},
		{ "EC", GD_EMERGENCYCALL,	},
	};

	if (!sd->status.guild_id || !(g = sd->guild) || !sd->state.gmaster_flag) {
		clif->message(fd, "Only a Guild Master can use this command.");
		return false;
	}

	if (pc_cant_act(sd) || pc_issit(sd) || pc_isdead(sd) ||
		sd->menuskill_id || (&sd->sc && sd->sc.option&OPTION_COSTUME) ||
		DIFF_TICK(timer->gettick(), sd->ud.canact_tick) < 0 ||
		sd->ud.skilltimer != INVALID_TIMER)
	{
		clif->message(fd, "Cannot use this skill in your current state.");
		return false;
	}

	for (i = 0; i < ARRAYLENGTH(guild_skill); i++) {
		if (strcmpi(guild_skill[i].skill, message) == 0)
			break;
	}
	if (i >= ARRAYLENGTH(guild_skill)) {
		clif->message(fd, "Invalid guild skill. Usage: @guildskill BO/RG/RS/EC");
		return false;
	}
	skill_id = guild_skill[i].skill_id;

	if (!(skill_lv = guild->checkskill(g, skill_id))) {
		clif->skill_fail(sd, skill_id, USESKILL_FAIL_LEVEL, 0);
		return false;
	}

	unit->skilluse_id(&sd->bl, sd->bl.id, skill_id, skill_lv);
	return true;
}