dpkg/lib/compat/unsetenv.c

/*
 * libcompat - system compatibility library
 *
 * Copyright © 1995 Ian Jackson <ian@chiark.greenend.org.uk>
 *
 * This 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 2,
 * or (at your option) any later version.
 *
 * This 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/>.
 */

#include <config.h>

#include <string.h>
#include <stdlib.h>

#ifndef HAVE_UNSETENV
int
unsetenv(const char *p)
{
	char *q;

	q = malloc(strlen(p) + 3);
	if (!q)
		return -1;

	strcpy(q, p);
	strcat(q, "=");
	return putenv(q);
}
#endif