server/daemon.c

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/************************************************************************
*            Atrinik, a Multiplayer Online Role Playing Game            *
*                                                                       *
*    Copyright (C) 2009-2011 Alex Tokar and Atrinik Development Team    *
*                                                                       *
* Fork from Daimonin (Massive Multiplayer Online Role Playing Game)     *
* and Crossfire (Multiplayer game for X-windows).                       *
*                                                                       *
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.             *
*                                                                       *
* The author can be reached at admin@atrinik.org                        *
************************************************************************/

#include <global.h>

void become_daemon(char *filename)
{
#ifndef WIN32
    pid_t pid, sid;
    time_t now = time(NULL);

    /* Fork off the parent process */
    pid = fork();

    if (pid < 0)
    {
        exit(EXIT_FAILURE);
    }

    /* If we got a good PID, then
     * we can exit the parent process. */
    if (pid > 0)
    {
        exit(EXIT_SUCCESS);
    }

    /* Change the file mode mask */
    umask(0);

    logfile = fopen(filename, "a");

    LOG(llevInfo, "******************************************************\n");
    LOG(llevInfo, "* New server session initialized at %.16s *\n", ctime(&now));
    LOG(llevInfo, "******************************************************\n\n");

    /* Create a new SID for the child process */
    sid = setsid();

    if (sid < 0)
    {
        /* Log the failure */
        exit(EXIT_FAILURE);
    }

    /* Close out the standard file descriptors */
    close(STDIN_FILENO);
    close(STDOUT_FILENO);
    close(STDERR_FILENO);
#else
    (void) filename;
#endif
}