1 /* Setting environment variables.
2 Copyright (C) 2001-2004, 2007 Free Software Foundation, Inc.
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 3 of the License, or
7 (at your option) any later version.
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.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 #if HAVE_SETENV || HAVE_UNSETENV
19 /* Get setenv(), unsetenv() declarations. */
30 /* Set NAME to VALUE in the environment.
31 If REPLACE is nonzero, overwrite an existing value. */
32 extern int setenv (const char *name, const char *value, int replace);
39 /* On some systems, unsetenv() returns void.
40 This is the case for FreeBSD 4.8, NetBSD 1.6, OpenBSD 3.4. */
41 # define unsetenv(name) ((unsetenv)(name), 0)
46 /* Remove the variable NAME from the environment. */
47 extern int unsetenv (const char *name);