/* * 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);}