Purpose: To get [TclX] file functionality into the core.  These will eventually become [TIP]s.

The '''-keepalive''' option should be added to [fconfigure] for sockets.  Possibly other sockopts should be added to fconfigure too.

A new command [pipe] should be added to provide TclX pipe functionality.  Alternatively, [[file pipe]] should be used (to save namespace pollution.)

'''Changes to tcl's file command'''

A new '''file type''' result, '''tty''', will be added.  Alternatively, a new subcommand '''file isatty''' can be defined on open file descriptors.

A new file option '''-fileid''' to allow an open file to be processed in place of the file name argument.  (This may not be possible under windows.)

    * '''file truncate''' for tclx's [ftruncate]
    * '''file lock''' for tclx's [flock]
    * '''file unlock''' for tclx's [funlock]
    * '''file dup''' for tclx's [dup]
    * '''file set''' ... not part of tclx, but would be nice ... [[file set stderr [[open /tmp/log a+]]]]

The most frequent request is to move the [TclX] signal handling commands into Tcl. 

Another suggestion that's been made in the past is to create an extension that provides Tcl bindings for the most useful Posix functions.

But what ''are'' the most useful Posix functions? :)

[DKF]: Useful Posix stuff (to me) has been: all the [signal] stuff, [fork]/[execl], [id] and [times].  YMMV.  :^)
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