src/server/shutdown.c

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/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
 *                           Ken Stevens, Steve McClure
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  ---
 *
 *  See files README, COPYING and CREDITS in the root of the source
 *  tree for related information and legal notices.  It is expected
 *  that future projects/authors will amend these files as needed.
 *
 *  ---
 *
 *  shutdown.c: Shuts down server.  Runs at low priority.
 * 
 *  Known contributors to this file:
 *     Ken Stevens, 1995
 *     Markus Armbruster, 2007
 */

#include <config.h>

#include <time.h>
#include "empthread.h"
#include "file.h"
#include "nat.h"
#include "prototypes.h"
#include "server.h"

int shutdown_pending;

static void shutdown_sequence(void *unused);

int
shutdown_initiate(int mins_from_now)
{
    int old_pending = shutdown_pending;

    if (mins_from_now < 0) {
        if (shutdown_pending) {
            shutdown_pending = 0;
            pr_wall("The server shutdown has been cancelled!\n");
        }
        return old_pending;
    }

    shutdown_pending = mins_from_now + 1;

    if (old_pending) {
        pr_wall("The shutdown time has been changed to %d minutes!\n",
                mins_from_now);
        /* FIXME wake up shutdown_sequence() */
    } else {
        if (!empth_create(shutdown_sequence, 50 * 1024, 0,
                          "shutdownSeq", NULL))
            return -1;
    }

    return old_pending;
}

static void
shutdown_sequence(void *unused)
{
    time_t now;

    pr_wall("The server will shut down in %d minutes!\n",
            shutdown_pending - 1);

    while (shutdown_pending > 0) {
        --shutdown_pending;
        time(&now);
        if (shutdown_pending <= 1440) { /* one day */
            if (shutdown_pending == 0) {
                shutdwn(0);
            } else if (shutdown_pending == 1) {
                pr_wall("Server shutting down in 1 minute!\n");
            } else if (shutdown_pending <= 5) {
                pr_wall("Server shutting down in %d minutes!\n",
                        shutdown_pending);
            } else if (shutdown_pending <= 60
                       && shutdown_pending % 10 == 0) {
                pr_wall("The server will be shutting down in %d minutes!\n",
                        shutdown_pending);
            } else if (shutdown_pending % 60 == 0) {
                pr_wall("The server will be shutting down %d hours from now.\n",
                        shutdown_pending / 60);
            }
        }
        /* FIXME error due to late wakeup accumulates */
        empth_sleep(now + 60);
    }
}

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