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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  con‐
       tains 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 charac‐
       ters 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  con‐
       version will be performed.

       The  determination of the user's application code in each terminal ses‐
       sion 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 val‐
       ued option defined in $HOME/.mailrc or /usr/share/lib/Mail.rc.

FILES
       Specifies the command path.  Includes information about logged-in users
       and  their  associated ttys.  File containing mailx subcommands to cus‐
       tomize mailx for a specific user.  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)

								     comsat(8)
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