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
__weak_alias(getgrouplist,_getgrouplist)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