The most frequent request is to move the [TclX] signal handling commands into Tcl.  This page is to formalise that desire, leading to a [TIP].  There is some discussion/question as to the wisdom of doing this in [TclX Future].

The [TclX] commands falling into this category are:

    :   [alarm] <<br>> [signal] <<br>> [kill] <<br>> [wait] <<br>> [sleep] <<br>> [execl] <<br>> [fork]
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[LV] Why is execl and fork in this list?  They really are not related
to signaling - more to posix.

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It should also be pointed out that signals are actually talked about in the C standard, so really they are not strictly bound to POSIX. --[Setok]
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Note that there is a LARGE limitation with `Tcl_AsyncMark` on UNIX where the notifier will not wake if idle due to a brain-dead implementation of `Tcl_AlertNotifier`.  See [http://sourceforge.net/tracker/index.php?func=detail&aid=502022&group_id=10894&atid=110894] or [http://sourceforge.net/tracker/index.php?func=detail&aid=502193&group_id=10894&atid=110894].  Once this is resolved, signals should work well. -- [DG]
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