rwall and shutdown

[George Elkins]

Is there an easy way to make the shutdown script automatically
warn users an all machines that have mounted exported
file systems that the machine is going down?  I have
seen this on Suns, but I haven't seen it done with
the Iris 4D.  The present shutdown script uses only the wall
command.  Do I have to rewrite shutdown so that it reads
/etc/rmtab (or whatever is appropriate) and broadcasts using
the rwall command?

thanks,
George Elkins