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63b68889 | 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 | |
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 */ |