1 /* $NetBSD: getgrouplist.c,v 1.22 2008/04/28 20:22:59 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2004-2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)getgrouplist.c 8.2 (Berkeley) 12/8/94"; 36 #else 37 __RCSID("$NetBSD: getgrouplist.c,v 1.22 2008/04/28 20:22:59 martin Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 /* 42 * calculate group access list 43 */ 44 45 #include "namespace.h" 46 #include <sys/param.h> 47 48 #include <assert.h> 49 #include <nsswitch.h> 50 #include <stdarg.h> 51 #include <unistd.h> 52 53 #ifdef __weak_alias 54 __weak_alias(getgrouplist,_getgrouplist) 55 #endif 56 57 int 58 getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt) 59 { 60 int rv, groupc; 61 62 _DIAGASSERT(uname != NULL); 63 /* groups may be NULL if just sizing when invoked with *grpcnt = 0 */ 64 _DIAGASSERT(grpcnt != NULL); 65 66 groupc = 0; 67 rv = getgroupmembership(uname, agroup, groups, *grpcnt, &groupc); 68 *grpcnt = groupc; /* set groupc to the actual # of groups */ 69 return rv; 70 } 71