/* * 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); }