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1 | #ifndef _COMPAT_GETENV_H |
2 | #define _COMPAT_GETENV_H | |
3 | ||
4 | /* | |
5 | * Copyright (C) 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License, version 2 only, | |
9 | * as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <unistd.h> | |
23 | #include <sys/types.h> | |
24 | #include <common/error.h> | |
25 | ||
26 | static inline | |
27 | int lttng_is_setuid_setgid(void) | |
28 | { | |
29 | return geteuid() != getuid() || getegid() != getgid(); | |
30 | } | |
31 | ||
32 | static inline | |
33 | char *lttng_secure_getenv(const char *name) | |
34 | { | |
35 | if (lttng_is_setuid_setgid()) { | |
36 | WARN("Getting environment variable '%s' from setuid/setgid binary refused for security reasons.", | |
37 | name); | |
38 | return NULL; | |
39 | } | |
40 | return getenv(name); | |
41 | } | |
42 | ||
43 | #endif /* _COMPAT_GETENV_H */ |