02-23-2010
Sending Messages to Users
How can I send messages to users who are logged in unto the server with Solaris 9 OS without going into the application?
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LEARN ABOUT FREEBSD
comsat
COMSAT(8) BSD System Manager's Manual COMSAT(8)
NAME
comsat -- biff server
SYNOPSIS
comsat
DESCRIPTION
The comsat utility is the server process which receives reports of incoming mail and notifies users if they have requested this service. The
comsat utility receives messages on a datagram port associated with the ``biff'' service specification (see services(5) and inetd(8)). The
one line messages are of the form:
user@mailbox-offset[:mailbox-name]
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 displayed message.
If the user specified is logged in to the system and the associated terminal has the group execute bit turned on (by a ``biff b''), two bell
characters (ASCII 07) are printed on the user's terminal.
If mailbox-name omitted, standard mailbox assumed.
FILES
/var/run/utx.active
to find out who is logged on and on what terminals
/var/mail/user standard mailbox
SEE ALSO
biff(1), inetd(8)
HISTORY
The comsat utility appeared in 4.2BSD.
BUGS
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.
BSD
January 21, 2010 BSD