BSD 2.11 - man page for comsat (bsd section 8)
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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-
/var/run/utmp to find out who's logged on and on what terminals
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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