Michael D. Hensley writes:
>
> Michael Hone asked:
>
> > Using MPE 5.5 , Windows 9.x workstations and Reflections 7.0
> >
> > How do you do any of the following:
> >
> > 1. Send a "beep" from a stream job to the speaker on !hpuser's PC.
> > 2. Send a signal from a stream job to !hpuser's PC that will make the
> > Reflections terminal window come to the top. 3. Send a signal from a
> > stream job to !hpuser's PC that will make the Reflections icon in the
> > Taskbar flash or turn color.
>
> Tough question!
>
> There is an escape sequence you can send to Reflection to make it execute a
> reflection script.  Forget the boring beep, you could get it to play a wav
> file!
>
> The official supported way to send a message from a batch job to a user's
> terminal is the "TELL" command.  Unfortunately, for important security
> reasons, it strips out most escape sequences.
>
> I can think of two alternatives.
>
> 1. Write a PM program to send the escape sequence.  Hard to do.  If you don't
> do it write, you can open up security holes galore (details withheld).

The actual unsupported PM code to send an arbitrary unedited message to a
given LDEV or the system console is pretty easy.

The "hard to do" part is if you attempt to actually parse the escape sequences
to allow just the benign ones or to forbid just the evil ones.
--
Mark Bixby                      E-mail: [log in to unmask]
Coast Community College Dist.   Web: http://www.cccd.edu/~markb/
District Information Services   1370 Adams Ave, Costa Mesa, CA, USA 92626-5429
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"You can tune a file system, but you can't tune a fish." - tunefs(1M)