| 1 | /* |
| 2 | * Print out the gids of all groups for the current user. This is like |
| 3 | * `id -G` on Linux, but it's too hard to find a portable equivalent. |
| 4 | * |
| 5 | * Copyright (C) 2002 Martin Pool |
| 6 | * Copyright (C) 2003-2008 Wayne Davison |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 3 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, visit the http://fsf.org website. |
| 19 | */ |
| 20 | |
| 21 | #include "rsync.h" |
| 22 | |
| 23 | int |
| 24 | main(UNUSED(int argc), UNUSED(char *argv[])) |
| 25 | { |
| 26 | int n, i; |
| 27 | gid_t *list; |
| 28 | gid_t gid = MY_GID(); |
| 29 | int gid_in_list = 0; |
| 30 | |
| 31 | #ifdef HAVE_GETGROUPS |
| 32 | if ((n = getgroups(0, NULL)) < 0) { |
| 33 | perror("getgroups"); |
| 34 | return 1; |
| 35 | } |
| 36 | #else |
| 37 | n = 0; |
| 38 | #endif |
| 39 | |
| 40 | list = (gid_t*)malloc(sizeof (gid_t) * (n + 1)); |
| 41 | if (!list) { |
| 42 | fprintf(stderr, "out of memory!\n"); |
| 43 | exit(1); |
| 44 | } |
| 45 | |
| 46 | #ifdef HAVE_GETGROUPS |
| 47 | if (n > 0) |
| 48 | n = getgroups(n, list); |
| 49 | #endif |
| 50 | |
| 51 | for (i = 0; i < n; i++) { |
| 52 | printf("%lu ", (unsigned long)list[i]); |
| 53 | if (list[i] == gid) |
| 54 | gid_in_list = 1; |
| 55 | } |
| 56 | /* The default gid might not be in the list on some systems. */ |
| 57 | if (!gid_in_list) |
| 58 | printf("%lu", (unsigned long)gid); |
| 59 | printf("\n"); |
| 60 | |
| 61 | return 0; |
| 62 | } |