/*
 * Copyright (c) 1995, 1996 Gunther Schadow.  All rights reserved.
 *
 * 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.
 */

#include "pg_config.h"
#include "ptydrv.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <unistd.h>

result
duplex(int fd1, int fd2)
{
  fd_set rfds;
  int nfd, rcnt;
  char buf[BUF_SIZE];

  FD_ZERO(&rfds);
  FD_SET(fd1, &rfds);
  FD_SET(fd2, &rfds);

 timeout:
 restart:

  switch(select(2, &rfds, NULL, NULL, NULL)) {
  case 0: goto timeout;
  case FAIL:
    if(errno == EINTR)
      goto restart;
    else
      return FAIL;
  default:
    if(FD_ISSET(fd1, &rfds))
      {
	rcnt = read(fd1, buf, BUF_SIZE);
	if(cnt == FAIL)
	  got FAIL;
	wcnt = write(fd1, buf, BUF_SIZE);
      }
  
    if(FD_ISSET(fd2, &rfds))
      {
	buf[BUF_SIZE];
      }
    goto restart;
  }
}