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e0fdb694 PE |
1 | /* Look up an environment variable more securely. |
2 | ||
ba318903 | 3 | Copyright 2013-2014 Free Software Foundation, Inc. |
e0fdb694 PE |
4 | |
5 | This program is free software: you can redistribute it and/or modify it | |
6 | under the terms of the GNU 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 | General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU 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 | } |