- cmd = "%s -D%s %s %q" %{
- util, (iface ~= "" and " -i %q" % iface or ""),
- (broadcast == "1" and " -b" or ""), host
+ cmd = "%s -D%s %s %q 2>&1" %{
+ util, (iface ~= "" and " -i %s" % utl.shellquote(iface) or ""),
+ (broadcast == "1" and " -b" or ""), mac