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dup2.c

/* Dup2.c - Duplicate a file descriptor.
   Copyright (C) 1992, 1996 Malc Arnold.

   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, 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 <fcntl.h>

/****************************************************************************/
/* RCS info. */

#ifndef lint
static char *RcsId = "$Id: dup2.c,v 2.0 1997/09/06 11:56:40 malc Rel $";
#endif /* ! lint */

/****************************************************************************/
/*LINTLIBRARY*/
/****************************************************************************/
/* Global function declarations */

extern int close(), fcntl();

/****************************************************************************/
int dup2(old_fd, new_fd)
int old_fd, new_fd;
{
      /* Make new_fd equal to old_fd, closing new_fd */

      (void) close(new_fd);
      return(fcntl(old_fd, F_DUPFD, new_fd));
}
/****************************************************************************/

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