SESSREG(1)							   SESSREG(1)



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 writing them at fixed posi-
       tions indexed by position in /etc/ttys.

       To manage BSD-style utmp files, sessreg has two strategies.   In	 con-
       junction	 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 and Linux also have 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" dis-
	      ables 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 terminal ses-
	      sions,  this  is	the  final  pathname  segment of the terminal
	      device filename (e.g. ttyd0).  For X sessions, it should proba-
	      bly  be the local display name given to the users session (e.g.
	      :0).  If none is specified, the terminal name  will  be  deter-
	      mined with ttyname(3) and stripped of leading components.

       -h host-name
	      This is set for BSD hosts to indicate that the session was ini-
	      tiated 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	 num-
	      ber  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



								   SESSREG(1)

UNIX/Linux commands referenced on this page:

1. file
2. at
3. which
4. display
5. as
6. sum
7. more
8. init
9. make
10. users