| 1 | /* Look up an environment variable more securely. |
| 2 | |
| 3 | Copyright 2013-2014 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software: you can redistribute it and/or modify it |
| 6 | under the terms of the GNU Lesser General Public License as published |
| 7 | by the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <config.h> |
| 19 | |
| 20 | #include <stdlib.h> |
| 21 | |
| 22 | #if !HAVE___SECURE_GETENV |
| 23 | # if HAVE_ISSETUGID |
| 24 | # include <unistd.h> |
| 25 | # else |
| 26 | # undef issetugid |
| 27 | # define issetugid() 1 |
| 28 | # endif |
| 29 | #endif |
| 30 | |
| 31 | char * |
| 32 | secure_getenv (char const *name) |
| 33 | { |
| 34 | #if HAVE___SECURE_GETENV |
| 35 | return __secure_getenv (name); |
| 36 | #else |
| 37 | if (issetugid ()) |
| 38 | return 0; |
| 39 | return getenv (name); |
| 40 | #endif |
| 41 | } |