http://purl.org/tcl/home/man/tcl8.4/TclCmd/fcopy.htm

fcopy provides the developer the ability to copy data from an input channel 
to an output channel, either synchronously or in the background, using fileevents to schedule activity.

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[LV] Does anyone have some sample code to demonstrate some tcl [best practices]
concerning writing async code using fcopy to copy files ?  
Maybe for instance the example could loop through 3 machines doing an fcopy 
of a file like /tmp/motd?

What I'm after is some examples of the type of code doing
error checking for things like machines not available, out of disk
space, etc - all the sort of things that if one is trying to write
a 'safe' application one would do. 

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[LV] In April, 2005, on comp.lang.tcl, a thread titled ''fcopy problem''
was discussing problems using fcopy on large binary files between
channels.  The fcopy appeared to be losing bytes.

The original poster was using ''-encoding binary'', because the
documentation said that this '''will then assign no interpretation to
the data in the file and simply read or write raw bytes'''.  
However, [DKF] suggested changing to use ''-translation binary'' instead.
The original poster followed up that making that change indeed sorted
out his problem.
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[dzach] 2006-5-8 Hmm... After spending a day trying to make a bidirectional copy between two open sockets, I wonder if 
something like '''fcopy sock1 sock2 -bidirectional 1 -command script''' is possible with fcopy as it stands today.
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