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comsat(8)							    comsat(8)



NAME

  comsat - The biff server

SYNOPSIS

  comsat

DESCRIPTION

  The comsat server receives reports of	incoming mail and notifies users who
  request this service.	 comsat	is invoked by the inetd(8) daemon when it
  receives messages on a datagram port associated with the biff(1) service
  specification	in /etc/services(4). The datagram contains a 1-line message
  of the form:

       user@mailbox-offset

  If the user specified	is logged in and the associated	terminal has the
  owner	execute	bit turned on (with biff y), offset is used as a seek offset
  into the file	named in mailbox. The first 7 lines or 560 characters of the
  message are printed on the user's system. The	message	excludes mail header
  lines	other than the From or Subject lines.

  The comsat command always tries to convert incoming mail messages from the
  mail interchange codeset to the user's application codeset. It determines
  the mail interchange code first by checking the mail message itself to see
  if it	contains the required information. Otherwise, the system-wide default
  mail interchange code	in the file /usr/lib/mail-codesets will	be used. If
  no such system file exists, no codeset conversion will be performed.

  The determination of the user's application code in each terminal session
  is by	one of the following methods.

    +  The application codeset defined in the user's Asian tty driver.

    +  The codeset name	stored in the ~/.codesetdevname	file, where devname
       is the name of the terminal device for the current terminal session.
       You can obtain the value	of devname by issuing the tty command.	For
       example,	if the tty command returns /dev/ttys8, use ttys8 as the	value
       for devname.

    +  The lang	valued option defined in $HOME/.mailrc or
       /usr/share/lib/Mail.rc.

FILES

  /usr/sbin/comsat
      Specifies	the command path.

  /var/adm/utmp
      Includes information about logged-in users and their associated ttys.

  $HOME/.mailrc
      File containing mailx subcommands	to customize mailx for a specific
      user.

  /usr/share/lib/Mail.rc
      File containing mailx subcommands	to change mailx	for all	users on the
      system.

SEE ALSO

  Commands: biff(1), inetd(8), mailx(1), mh(1)

  Files: services(4), inetd.conf(4), tty(7)