blob: 3906cd62970c6b79f09a7fbb2bdcd7dfa3eb30fc [file] [log] [blame]
Darren Tucker30f9bd12016-08-02 09:06:27 +10001/* $OpenBSD: getgrouplist.c,v 1.12 2005/08/08 08:05:34 espie Exp */
Kevin Steves886b06c2001-01-14 00:35:19 +00002/*
3 * Copyright (c) 1991, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
Damien Miller329638e2003-06-03 12:12:50 +100014 * 3. Neither the name of the University nor the names of its contributors
Kevin Steves886b06c2001-01-14 00:35:19 +000015 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
Darren Tucker7f24a0e2005-11-10 16:18:56 +110031/* OPENBSD ORIGINAL: lib/libc/gen/getgrouplist.c */
32
Kevin Steves886b06c2001-01-14 00:35:19 +000033#include "includes.h"
34
35#ifndef HAVE_GETGROUPLIST
36
Kevin Steves886b06c2001-01-14 00:35:19 +000037/*
38 * get credential
39 */
40#include <sys/types.h>
41#include <string.h>
Ben Lindstromaf4a6c32003-08-25 01:10:51 +000042#include <unistd.h>
Kevin Steves886b06c2001-01-14 00:35:19 +000043#include <grp.h>
44
45int
Darren Tuckere5a2b522005-11-10 15:56:44 +110046getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt)
Kevin Steves886b06c2001-01-14 00:35:19 +000047{
Darren Tuckere5a2b522005-11-10 15:56:44 +110048 struct group *grp;
49 int i, ngroups;
Kevin Steves886b06c2001-01-14 00:35:19 +000050 int ret, maxgroups;
51 int bail;
52
53 ret = 0;
54 ngroups = 0;
55 maxgroups = *grpcnt;
56
57 /*
58 * install primary group
59 */
60 if (ngroups >= maxgroups) {
61 *grpcnt = ngroups;
62 return (-1);
63 }
64 groups[ngroups++] = agroup;
65
66 /*
67 * Scan the group file to find additional groups.
68 */
69 setgrent();
70 while ((grp = getgrent())) {
71 if (grp->gr_gid == agroup)
72 continue;
73 for (bail = 0, i = 0; bail == 0 && i < ngroups; i++)
74 if (groups[i] == grp->gr_gid)
75 bail = 1;
76 if (bail)
77 continue;
78 for (i = 0; grp->gr_mem[i]; i++) {
79 if (!strcmp(grp->gr_mem[i], uname)) {
80 if (ngroups >= maxgroups) {
81 ret = -1;
82 goto out;
83 }
84 groups[ngroups++] = grp->gr_gid;
85 break;
86 }
87 }
88 }
89out:
90 endgrent();
91 *grpcnt = ngroups;
92 return (ret);
93}
94
95#endif /* HAVE_GETGROUPLIST */