1*a7c91847Schristos /* Setting environment variables. 2*a7c91847Schristos Copyright (C) 2001-2004 Free Software Foundation, Inc. 3*a7c91847Schristos 4*a7c91847Schristos This program is free software; you can redistribute it and/or modify 5*a7c91847Schristos it under the terms of the GNU General Public License as published by 6*a7c91847Schristos the Free Software Foundation; either version 2, or (at your option) 7*a7c91847Schristos any later version. 8*a7c91847Schristos 9*a7c91847Schristos This program is distributed in the hope that it will be useful, 10*a7c91847Schristos but WITHOUT ANY WARRANTY; without even the implied warranty of 11*a7c91847Schristos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12*a7c91847Schristos GNU General Public License for more details. 13*a7c91847Schristos 14*a7c91847Schristos You should have received a copy of the GNU General Public License 15*a7c91847Schristos along with this program; if not, write to the Free Software Foundation, 16*a7c91847Schristos Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 17*a7c91847Schristos 18*a7c91847Schristos #if HAVE_SETENV || HAVE_UNSETENV 19*a7c91847Schristos 20*a7c91847Schristos /* Get setenv(), unsetenv() declarations. */ 21*a7c91847Schristos # include <stdlib.h> 22*a7c91847Schristos 23*a7c91847Schristos #endif 24*a7c91847Schristos 25*a7c91847Schristos #ifdef __cplusplus 26*a7c91847Schristos extern "C" { 27*a7c91847Schristos #endif 28*a7c91847Schristos 29*a7c91847Schristos #if !HAVE_SETENV 30*a7c91847Schristos 31*a7c91847Schristos /* Set NAME to VALUE in the environment. 32*a7c91847Schristos If REPLACE is nonzero, overwrite an existing value. */ 33*a7c91847Schristos extern int setenv (const char *name, const char *value, int replace); 34*a7c91847Schristos 35*a7c91847Schristos #endif 36*a7c91847Schristos 37*a7c91847Schristos #if HAVE_UNSETENV 38*a7c91847Schristos 39*a7c91847Schristos # if VOID_UNSETENV 40*a7c91847Schristos /* On some systems, unsetenv() returns void. 41*a7c91847Schristos This is the case for FreeBSD 4.8, NetBSD 1.6, OpenBSD 3.4. */ 42*a7c91847Schristos # define unsetenv(name) ((unsetenv)(name), 0) 43*a7c91847Schristos # endif 44*a7c91847Schristos 45*a7c91847Schristos #else 46*a7c91847Schristos 47*a7c91847Schristos /* Remove the variable NAME from the environment. */ 48*a7c91847Schristos extern int unsetenv (const char *name); 49*a7c91847Schristos 50*a7c91847Schristos #endif 51*a7c91847Schristos 52*a7c91847Schristos #ifdef __cplusplus 53*a7c91847Schristos } 54*a7c91847Schristos #endif 55