Dan Muey wrote: > > $exit_value = $? >> 8; bit 8 [0 bit on high byte] > > $signal_num = $? & 127; value of 7 lowest bits > > $dumped_core = $? & 128; bit 7 [highest bit of low byte] > Just curious, what is happening here with the >> and the &. > I see there's a 128 there, perhaps that's where it is coming from? > > > print "$exit_value, $signal_num, $dumped_core\n";
Very standard stuff. It assumes a bitflag of at least two bytes, as the first line woouldn't work for a char-sized bitflag. Protocols like this are used in 'nix, Windows, and just about any OS out there. [though not always in the same contexts] Joseph -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
