1/* 2 * getgrgid.c - This file is part of the libc-8086/grp package for ELKS, 3 * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public 16 * License along with this library; if not, write to the Free 17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * 19 */ 20 21#include <sys/types.h> 22#include <unistd.h> 23#include <fcntl.h> 24#include "grp.h" 25 26struct group *getgrgid(const gid_t gid) 27{ 28 struct group *group; 29 int grp_fd; 30 31 if ((grp_fd = open("/etc/group", O_RDONLY)) < 0) 32 return NULL; 33 34 while ((group = __getgrent(grp_fd)) != NULL) 35 if (group->gr_gid == gid) { 36 close(grp_fd); 37 return group; 38 } 39 40 close(grp_fd); 41 return NULL; 42} 43