/* Setting environment variables.
   Copyright (C) 2001-2004, 2007 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#if HAVE_SETENV || HAVE_UNSETENV

/* Get setenv(), unsetenv() declarations.  */
# include <stdlib.h>

#endif

#ifdef __cplusplus
extern "C" {
#endif

#if !HAVE_SETENV

/* Set NAME to VALUE in the environment.
   If REPLACE is nonzero, overwrite an existing value.  */
extern int setenv (const char *name, const char *value, int replace);

#endif

#if HAVE_UNSETENV

# if VOID_UNSETENV
/* On some systems, unsetenv() returns void.
   This is the case for FreeBSD 4.8, NetBSD 1.6, OpenBSD 3.4.  */
#  define unsetenv(name) ((unsetenv)(name), 0)
# endif

#else

/* Remove the variable NAME from the environment.  */
extern int unsetenv (const char *name);

#endif

#ifdef __cplusplus
}
#endif
