strstr(str, to_find)
{
	local to_find_size;
	local tmp;

	to_find_size = strlen(to_find);
	loop
	{
		tmp = strchr(str, [to_find]);
		if (tmp == 0)
			return (0);
		if (strncmp(tmp, to_find, to_find_size) == 0)
			return (tmp);
	}
}