is the server process which receives reports
of incoming mail and notifies users if they have requested this service.
receives messages on a datagram port
associated with the “biff” service specification (see
). The one line messages
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
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
- to find out who's logged on and on what terminals
command appeared in
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