XENIX command 'haltsys' equivalent in UNIX?

[Teresa Fung]

Can someone tell me what the equivalent command in 
UNIX SYSTEM V/68 to the XENIX OS 'haltsys' is?

To quote the XENIX manual, haltsys :
	... flush out pending disk I/O, mark the
		file systems clean and halt the 
		processor ... displays a prompt 
		indicating that the system has been
		shut down and can be rebooted OR
		powered down ...

The closest command that I have found is shutdown but
it doesn't give the user a choice to power down or
reboot (by hitting a key).         

Thanks in advance for the help.

Teresa Fung
Northern Telecom

... and the general disclosure stuff...  :-)
-- 
Teresa Fung