/* * getgrgid.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. * */#include <sys/types.h>#include <unistd.h>#include <fcntl.h>#include "grp.h"struct group *getgrgid(const gid_t gid){	struct group *group;	int grp_fd;	if ((grp_fd = open("/etc/group", O_RDONLY)) < 0)		return NULL;	while ((group = __getgrent(grp_fd)) != NULL)		if (group->gr_gid == gid) {			close(grp_fd);			return group;		}	close(grp_fd);	return NULL;}