/* * pwent.c - This file is part of the libc-8086/pwd 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 <unistd.h>#include <stdlib.h>#include <errno.h>#include "pwd.h"#include <fcntl.h>/* * setpwent(), endpwent(), and getpwent() are included in the same object * file, since one cannot be used without the other two, so it makes sense to * link them all in together. *//* file descriptor for the password file currently open */static int pw_fd = -1;void setpwent(void){	if (pw_fd != -1)		close(pw_fd);	pw_fd = open("/etc/passwd", O_RDONLY);}void endpwent(void){	if (pw_fd != -1)		close(pw_fd);	pw_fd = -1;}struct passwd *getpwent(void){	if (pw_fd != -1)		return (__getpwent(pw_fd));	return NULL;}