system.c

linux下的E_MAIL客户端源码

/*
 *  $Id: System.C,v 1.3 2000/05/07 12:26:11 fnevgeny Exp $
 *  
 *  Copyright (c) 1994 HAL Computer Systems International, Ltd.
 * 
 *          HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
 *                  1315 Dell Avenue
 *                  Campbell, CA  95008
 *
 * Author: Greg Hilton
 * Contributors: Tom Lang, Frank Bieser, and others
 *
 * 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.
 *
 * http://www.gnu.org/copyleft/gpl.html
 *
 * 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.
 */

#include <config.h>
#include "Base.h"

#include <signal.h>

extern int	debug1, debug2;

int
System(const char *cmd)
{
//
// Install the default signale handler for SIGCHLD
//
   SIG_PF    oldchld = signal(SIGCHLD, SIG_DFL);

//
// Run the command
//
   if ( debug2 ) cout <<"Executing [" <<cmd <<"]" <<endl;
   int       status = system(cmd);

//
// Restore any previous signal handler for SIGCHLD
//
   signal(SIGCHLD, oldchld);

//
// Decode the status
//
   if ( status > 0 ) {
      if ( (0x00ff & status) == 0177 )	 status = (0x00ffff & status) >> 8;
      else if ( (0x00ff & status) != 0 ) status = (0x00007f & status);
      else				 status = (0x00ffff & status) >> 8;
   }

   if ( debug2 ) cout <<"status is " <<status <<endl;
   return status;
}