1 /*
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "includes.h"
35
36 #ifndef HAVE_GETGROUPLIST
37
38 #if defined(LIBC_SCCS) && !defined(lint)
39 static char rcsid[] = "$OpenBSD: getgrouplist.c,v 1.7 1997/08/19 19:13:27 deraadt Exp $";
40 #endif /* LIBC_SCCS and not lint */
41
42 /*
43 * get credential
44 */
45 #include <sys/types.h>
46 #include <string.h>
47 #include <grp.h>
48
49 int
getgrouplist(uname,agroup,groups,grpcnt)50 getgrouplist(uname, agroup, groups, grpcnt)
51 const char *uname;
52 gid_t agroup;
53 register gid_t *groups;
54 int *grpcnt;
55 {
56 register struct group *grp;
57 register int i, ngroups;
58 int ret, maxgroups;
59 int bail;
60
61 ret = 0;
62 ngroups = 0;
63 maxgroups = *grpcnt;
64
65 /*
66 * install primary group
67 */
68 if (ngroups >= maxgroups) {
69 *grpcnt = ngroups;
70 return (-1);
71 }
72 groups[ngroups++] = agroup;
73
74 /*
75 * Scan the group file to find additional groups.
76 */
77 setgrent();
78 while ((grp = getgrent())) {
79 if (grp->gr_gid == agroup)
80 continue;
81 for (bail = 0, i = 0; bail == 0 && i < ngroups; i++)
82 if (groups[i] == grp->gr_gid)
83 bail = 1;
84 if (bail)
85 continue;
86 for (i = 0; grp->gr_mem[i]; i++) {
87 if (!strcmp(grp->gr_mem[i], uname)) {
88 if (ngroups >= maxgroups) {
89 ret = -1;
90 goto out;
91 }
92 groups[ngroups++] = grp->gr_gid;
93 break;
94 }
95 }
96 }
97 out:
98 endgrent();
99 *grpcnt = ngroups;
100 return (ret);
101 }
102
103 #endif /* HAVE_GETGROUPLIST */
104
105 #pragma ident "%Z%%M% %I% %E% SMI"
106