2 * Copyright (c) 2001 Kevin Steves. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 RCSID("$OpenBSD: groupaccess.c,v 1.6 2003/04/08 20:21:28 itojun Exp $");
28 #include "groupaccess.h"
34 static char **groups_byname;
37 * Initialize group access list for user with primary (base) and
38 * supplementary groups. Return the number of groups in the list.
41 ga_init(const char *user, gid_t base)
50 ngroups = NGROUPS_MAX;
51 #if defined(HAVE_SYSCONF) && defined(_SC_NGROUPS_MAX)
52 ngroups = MAX(NGROUPS_MAX, sysconf(_SC_NGROUPS_MAX));
55 groups_bygid = xmalloc(ngroups * sizeof(*groups_bygid));
56 groups_byname = xmalloc(ngroups * sizeof(*groups_byname));
58 if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
59 logit("getgrouplist: groups list too small");
60 for (i = 0, j = 0; i < ngroups; i++)
61 if ((gr = getgrgid(groups_bygid[i])) != NULL)
62 groups_byname[j++] = xstrdup(gr->gr_name);
68 * Return 1 if one of user's groups is contained in groups.
69 * Return 0 otherwise. Use match_pattern() for string comparison.
72 ga_match(char * const *groups, int n)
76 for (i = 0; i < ngroups; i++)
77 for (j = 0; j < n; j++)
78 if (match_pattern(groups_byname[i], groups[j]))
84 * Free memory allocated for group access list.
92 for (i = 0; i < ngroups; i++)
93 xfree(groups_byname[i]);