1/* Look up an environment variable more securely. 2 3 Copyright 2013-2014 Free Software Foundation, Inc. 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 31char * 32secure_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} 42