BSD 2.11 - man page for comsat (bsd section 8)

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COMSAT(8)										COMSAT(8)

       comsat - biff server


       Comsat is the server process which receives reports of incoming mail and notifies users if
       they have requested this service.  Comsat receives messages on a datagram port  associated
       with the ``biff'' service specification (see services(5) and inetd(8)).	The one line mes-
       sages are of the form


       If the user specified is logged in to the system and the associated terminal has the owner
       execute	bit  turned  on  (by  a ``biff y''), the offset is used as a seek offset into the
       appropriate mailbox file and the first 7 lines  or  560	characters  of	the  message  are
       printed on the user's terminal.	Lines which appear to be part of the message header other
       than the ``From'', ``To'', ``Date'', or ``Subject'' lines are not  included  in	the  dis-
       played message.

       /var/run/utmp  to find out who's logged on and on what terminals

       biff(1), inetd(8)

       The  message header filtering is prone to error.  The density of the information presented
       is near the theoretical minimum.

       Users should be notified of mail which arrives on other machines than  the  one	to  which
       they are currently logged in.

       The notification should appear in a separate window so it does not mess up the screen.

4.2 Berkeley Distribution		November 16, 1996				COMSAT(8)
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