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1 | #ifndef _COMPAT_GETENV_H |
2 | #define _COMPAT_GETENV_H | |
3 | ||
4 | /* | |
ab5be9fa | 5 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
e8fa9fb0 | 6 | * |
ab5be9fa | 7 | * SPDX-License-Identifier: GPL-2.0-only |
e8fa9fb0 | 8 | * |
e8fa9fb0 MD |
9 | */ |
10 | ||
11 | #include <stdlib.h> | |
12 | #include <unistd.h> | |
13 | #include <sys/types.h> | |
14 | #include <common/error.h> | |
15 | ||
16 | static inline | |
17 | int lttng_is_setuid_setgid(void) | |
18 | { | |
19 | return geteuid() != getuid() || getegid() != getgid(); | |
20 | } | |
21 | ||
22 | static inline | |
23 | char *lttng_secure_getenv(const char *name) | |
24 | { | |
25 | if (lttng_is_setuid_setgid()) { | |
26 | WARN("Getting environment variable '%s' from setuid/setgid binary refused for security reasons.", | |
27 | name); | |
28 | return NULL; | |
29 | } | |
30 | return getenv(name); | |
31 | } | |
32 | ||
33 | #endif /* _COMPAT_GETENV_H */ |