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SESSREG(1)									       SESSREG(1)

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

       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

       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 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 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.

       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

       -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

       -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 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 tty-
	      name(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.


       Keith Packard, MIT X Consortium

X Version 11				   Release 6.6				       SESSREG(1)
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