projects / lttng-tools.git / blame
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|---|---|---|
| e8fa9fb0 MD |
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 */ |