1 /* Setting environment variables. 2 Copyright (C) 2001-2004 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software Foundation, 16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 17 18 #if HAVE_SETENV || HAVE_UNSETENV 19 20 /* Get setenv(), unsetenv() declarations. */ 21 # include <stdlib.h> 22 23 #endif 24 25 #ifdef __cplusplus 26 extern "C" { 27 #endif 28 29 #if !HAVE_SETENV 30 31 /* Set NAME to VALUE in the environment. 32 If REPLACE is nonzero, overwrite an existing value. */ 33 extern int setenv (const char *name, const char *value, int replace); 34 35 #endif 36 37 #if HAVE_UNSETENV 38 39 # if VOID_UNSETENV 40 /* On some systems, unsetenv() returns void. 41 This is the case for FreeBSD 4.8, NetBSD 1.6, OpenBSD 3.4. */ 42 # define unsetenv(name) ((unsetenv)(name), 0) 43 # endif 44 45 #else 46 47 /* Remove the variable NAME from the environment. */ 48 extern int unsetenv (const char *name); 49 50 #endif 51 52 #ifdef __cplusplus 53 } 54 #endif 55