daemon.c

mgcp协议源代码。支持多种编码：g711

/*----------------------------------------------------------------------*\

  daemon.c                                                 
  
  This module has the functions needed for a program to become a daemon.

  Copyright (c) 1997-1999 Quicknet Technologies, Inc.
    
  Written by Greg Herlein <[e-mail]>, donated to Quicknet
  Technologies, Inc. 6/10/99. 
  
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License (LGPL) as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This software 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 Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.  It is also available online at 
 * http://www.gnu.org/copyleft/lesser.html

/*-------------------------------< RCS >--------------------------------*/
static char RCS_ID[] = "$Id: daemon.c,v 1.1.1.1 1999/07/16 01:26:02 bogawa Exp $";
/*----------------------------< Defines >-------------------------------*/
/*----------------------------< Includes >------------------------------*/
/* stdlib */
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

/* other */
#include "daemon.h"

/*---------------------------< Definitions >----------------------------*/
/*--------------------------< Declarations >----------------------------*/
/*------------------------< Global Variables >--------------------------*/
/*-------------------------< Local Variables >--------------------------*/
/*----------------------------------------------------------------------*/
int
daemon_init(void)
{
  pid_t               pid;
  
  pid=fork();
  if(pid<0) return -1;
  else if(pid!=0) exit(0); /* parent exits */
  /* child continues and become session leader */
  setsid();                      
  return 0;
}