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/*
 * grent.c - This file is part of the libc-8086/grp package for ELKS,
 * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
 
/*
 * setgrent(), endgrent(), and getgrent() are mutually-dependent functions,
 * so they are all included in the same object file, and thus all linked
 * in together.
 */
 
#include <unistd.h>
#include <fcntl.h>
#include <grp.h>
 
static int grp_fd=-1;
 
void
setgrent(void)
{
  if (grp_fd!=-1)
    close(grp_fd);
  grp_fd=open("/etc/group", O_RDONLY);
}
 
void
endgrent(void)
{
 if (grp_fd!=-1)
   close(grp_fd);
 grp_fd=-1;
}
 
struct group *
getgrent(void)
{
  if (grp_fd==-1)
    return NULL;
  return __getgrent(grp_fd);
}