projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| 730bf2af 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 library is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; only | |
| 10 | * version 2.1 of the License. | |
| 11 | * | |
| 12 | * This library is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with this library; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include <stdlib.h> | |
| 23 | #include <unistd.h> | |
| 24 | #include <sys/types.h> | |
| 25 | #include <usterr-signal-safe.h> | |
| 26 | ||
| 27 | static inline | |
| 28 | int lttng_is_setuid_setgid(void) | |
| 29 | { | |
| 30 | return geteuid() != getuid() || getegid() != getgid(); | |
| 31 | } | |
| 32 | ||
| 33 | static inline | |
| 34 | char *lttng_secure_getenv(const char *name) | |
| 35 | { | |
| 36 | if (lttng_is_setuid_setgid()) { | |
| 37 | ERR("Getting environment variable '%s' from setuid/setgid binary refused for security reasons.", | |
| 38 | name); | |
| 39 | return NULL; | |
| 40 | } | |
| 41 | return getenv(name); | |
| 42 | } | |
| 43 | ||
| 44 | #endif /* _COMPAT_GETENV_H */ |