std man page

tcl::chan::std — Standard I/O, unification of stdin and stdout


package require Tcl  8.5

package require TclOO

package require tcl::chan::core  ?1?

package require tcl::chan::std  ?1?



The tcl::chan::std package provides a command creating a standard channel which unifies stdin and stdout into a single read- and writable channel. The result is not seek-able, like the original standard channels.

The internal TclOO class implementing the channel handler is a sub-class of the tcl::chan::core framework.



This command creates the std channel and returns its handle.

The channel is created only once, on the first call, and all future calls simply return this handle.

Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category virtchannel of the Tcllib Trackers []. Please also report any ideas for enhancements you may have for either package and/or documentation.


reflected channel, standard io, stdin, stdout, tip 219, virtual channel




1 tcllib Reflected/virtual channel support