ultrix man page for zero

zero(3tcl)																zero(3tcl)

NAME
       zero - Create and manipulate zero channels

SYNOPSIS
       package require Tcl

       package require memchan

       zero

DESCRIPTION
       The command described here is only available in a not-yet released version of the package. Use the CVS to get the sources.

       zero   creates  a  zero	channel  which absorbs everything written into it. Reading from a zero channel will return the requested number of
	      null bytes. These channels are essentially Tcl-specific variants of the zero  device  for  unixoid  operating  systems  (/dev/zero).
	      Transferring the generated channel between interpreters is possible but does not make much sense.

OPTIONS
       Memory channels created by zero provide one additional option to set or query.

       -delay ?milliseconds?
	      A  zero channel is always writable and readable. This means that all fileevent-handlers will fire continuously.  To avoid starvation
	      of other event sources the events raised by this channel type have a configurable delay. This option  is	set  in  milliseconds  and
	      defaults to 5.

SEE ALSO
       fifo, fifo2, memchan, null, random

KEYWORDS
       channel, i/o, in-memory channel, null, zero

COPYRIGHT
       Copyright (c) 2004 Pat Thoyts <patthoyts@users.sourceforge.net>

Memory channels 							2.2								zero(3tcl)