[Sunhelp] Scripts - checking user

[A P]

If your user1 have a ".rhosts" in $HOME, and user2 can "su" to user1, then 
using "rlogin" user2 can login ("loop") as your user1 on the system.

If "r" commands are disabled, then "who" and "logname" will return real id 
of the user.
-a-
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