| 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 | |
| 29 | #ifndef NGROUPS_MAX |
| 30 | /* It ought to be defined, but just in case. */ |
| 31 | # define NGROUPS_MAX 32 |
| 32 | #endif |
| 33 | |
| 34 | int |
| 35 | main(UNUSED(int argc), UNUSED(char *argv[])) |
| 36 | { |
| 37 | int n, i; |
| 38 | gid_t list[NGROUPS_MAX]; |
| 39 | gid_t gid = getgid(); |
| 40 | int gid_in_list = 0; |
| 41 | |
| 42 | if ((n = getgroups(NGROUPS_MAX, list)) < 0) { |
| 43 | perror("getgroups"); |
| 44 | return 1; |
| 45 | } |
| 46 | |
| 47 | for (i = 0; i < n; i++) { |
| 48 | printf("%lu ", (unsigned long)list[i]); |
| 49 | if (list[i] == gid) |
| 50 | gid_in_list = 1; |
| 51 | } |
| 52 | /* The default gid might not be in the list on some systems. */ |
| 53 | if (!gid_in_list) |
| 54 | printf("%lu", (unsigned long)gid); |
| 55 | printf("\n"); |
| 56 | |
| 57 | return 0; |
| 58 | } |