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NAME
     sessreg - manage utmp/wtmp entries for non-init clients

SYNOPSIS
     sessreg [-w wtmp-file] [-u  utmp-file]  [-l  line-name]  [-h
     host-name]  [-s  slot-number]  [-x  Xservers-file] [-t ttys-
     file] [-a] [-d] user-name

DESCRIPTION
     Sessreg is a simple program for managing  utmp/wtmp  entries
     for xdm sessions.

     System V has a better interface to /etc/utmp  than  BSD;  it
     dynamically  allocates entries in the file, instead of writ-
     ing  them  at  fixed  positions  indexed  by   position   in
     /etc/ttys.

     To manage BSD-style utmp files, sessreg has two  strategies.
     In  conjunction with xdm, the -x option counts the number of
     lines in /etc/ttys and then adds to that the number  of  the
     line  in the Xservers file which specifies the display.  The
     display name must be specified as the "line-name" using  the
     -l  option.   This  sum  is  used  as  the  "slot-number" in
     /etc/utmp that this entry will be written at.  In  the  more
     general  case,  the  -s  option  specifies  the  slot-number
     directly.  If for some strange reason  your  system  uses  a
     file  other that /etc/ttys to manage init, the -t option can
     direct sessreg to look elsewhere for  a  count  of  terminal
     sessions.

     Conversely, System V managers will  not  ever  need  to  use
     these  options  (-x, -s and -t).  To make the program easier
     to document and explain, sessreg  accepts  the  BSD-specific
     flags in the System V environment and ignores them.

     BSD also has a  host-name  field  in  the  utmp  file  which
     doesn't  exist  in System V.  This option is also ignored by
     the System V version of sessreg.

USAGE
     In Xstartup, place a call like:

            sessreg -a -l $DISPLAY -x /usr/X11R6/lib/xdm/Xservers $USER

     and in Xreset:

            sessreg -d -l $DISPLAY -x /usr/X11R6/lib/xdm/Xservers $USER

OPTIONS
     -w wtmp-file
          This specifies  an  alternate  wtmp  file,  instead  of
          /usr/adm/wtmp  for  BSD  or  /etc/wtmp  for  sysV.  The
          special  name  "none"  disables  writing   records   to
          /usr/adm/wtmp.

     -u utmp-file
          This specifies  an  alternate  utmp  file,  instead  of
          "/etc/utmp".   The special name "none" disables writing
          records to /etc/utmp.

     -l line-name
          This describes the "line" name of the entry.  For  ter-
          minal  sessions,  this is the final pathname segment of
          the terminal device filename (e.g. ttyd0).  For X  ses-
          sions,  it  should  probably  be the local display name
          given to the users  session  (e.g.  :0).   If  none  is
          specified,  the  terminal  name will be determined with
          ttyname(3) and stripped of leading components.

     -h host-name
          This is set for BSD hosts to indicate that the  session
          was  initiated  from  a  remote  host.   In typical xdm
          usage, this options is not used.

     -s slot-number
          Each potential session has a unique slot number in  BSD
          systems,  most  are  identified  by the position of the
          line-name in the /etc/ttys file.  This option overrides
          the  default position determined with ttyslot(3).  This
          option is inappropriate for use with xdm, the -x option
          is more useful.

     -x Xservers-file
          As X sessions are one-per-display, and each display  is
          entered in this file, this options sets the slot-number
          to be the number of lines in  the  ttys-file  plus  the
          index into this file that the line-name is found.

     -t ttys-file
          This specifies an alternate file which  the  -x  option
          will  use to count the number of terminal sessions on a
          host.

     -a   This session should be added to utmp/wtmp.

     -d   This session should be deleted from utmp/wtmp.  One  of
          -a/-d must be specified.

SEE ALSO
     xdm(1)

AUTHOR
     Keith Packard, MIT X Consortium

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