1#define _GNU_SOURCE
 2#include <stdlib.h>
 3#include <unistd.h>
 4
 5static void dummy(char *old, char *new) {}
 6weak_alias(dummy, __env_rm_add);
 7
 8int clearenv()
 9{
10	char **e = __environ;
11	__environ = 0;
12	if (e) while (*e) __env_rm_add(*e++, 0);
13	return 0;
14}