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 1.5 2002/03/04 17:27:39 stevesk Exp $");
28 #include "groupaccess.h"
34 static char *groups_byname[NGROUPS_MAX + 1]; /* +1 for base/primary group */
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)
43 gid_t groups_bygid[NGROUPS_MAX + 1];
50 ngroups = sizeof(groups_bygid) / sizeof(gid_t);
51 if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
52 log("getgrouplist: groups list too small");
53 for (i = 0, j = 0; i < ngroups; i++)
54 if ((gr = getgrgid(groups_bygid[i])) != NULL)
55 groups_byname[j++] = xstrdup(gr->gr_name);
60 * Return 1 if one of user's groups is contained in groups.
61 * Return 0 otherwise. Use match_pattern() for string comparison.
64 ga_match(char * const *groups, int n)
68 for (i = 0; i < ngroups; i++)
69 for (j = 0; j < n; j++)
70 if (match_pattern(groups_byname[i], groups[j]))
76 * Free memory allocated for group access list.
84 for (i = 0; i < ngroups; i++)
85 xfree(groups_byname[i]);