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4acbfa2a MP |
1 | /* |
2 | * Copyright (C) 2002 by Martin Pool | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /** | |
20 | * @file getgroups.c | |
21 | * | |
22 | * Print out the gids of all groups for the current user. This is | |
23 | * like `id -G` on Linux, but it's too hard to find a portable | |
24 | * equivalent. | |
25 | **/ | |
26 | ||
27 | #include "rsync.h" | |
28 | ||
f69204ad WD |
29 | int |
30 | main(UNUSED(int argc), UNUSED(char *argv[])) | |
4acbfa2a MP |
31 | { |
32 | int n, i; | |
40ae4f93 | 33 | gid_t *list; |
670d8abf | 34 | gid_t gid = MY_GID(); |
58743a87 | 35 | int gid_in_list = 0; |
4acbfa2a | 36 | |
1df395f7 | 37 | #ifdef HAVE_GETGROUPS |
40ae4f93 | 38 | if ((n = getgroups(0, NULL)) < 0) { |
4acbfa2a MP |
39 | perror("getgroups"); |
40 | return 1; | |
41 | } | |
1df395f7 WD |
42 | #else |
43 | n = 0; | |
44 | #endif | |
4acbfa2a | 45 | |
40ae4f93 WD |
46 | list = (gid_t*)malloc(sizeof (gid_t) * (n + 1)); |
47 | if (!list) { | |
48 | fprintf(stderr, "out of memory!\n"); | |
49 | exit(1); | |
50 | } | |
51 | ||
52 | #ifdef HAVE_GETGROUPS | |
53 | if (n > 0) | |
54 | n = getgroups(n, list); | |
55 | #endif | |
56 | ||
58743a87 | 57 | for (i = 0; i < n; i++) { |
f358487f | 58 | printf("%lu ", (unsigned long)list[i]); |
58743a87 WD |
59 | if (list[i] == gid) |
60 | gid_in_list = 1; | |
61 | } | |
62 | /* The default gid might not be in the list on some systems. */ | |
63 | if (!gid_in_list) | |
64 | printf("%lu", (unsigned long)gid); | |
4acbfa2a MP |
65 | printf("\n"); |
66 | ||
67 | return 0; | |
68 | } |