| SESSREG(1) | General Commands Manual | SESSREG(1) | 
NAME
 sessreg - manage utmp/wtmp entries for non-init clients
SYNOPSIS
 sessreg [-w  wtmp-file] [-u  utmp-file] [-L  lastlog-file] [-l  line-name] [-h  host-name] [-s  slot-number] [-x  Xservers-file] [-t  ttys-file] [-V] [-a] [-d]  user-name
DESCRIPTION
  Sessreg is a simple program for managing utmp/wtmp and lastlog entries for xdm sessions.
System V has a better interface to 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 the utmp file 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 than /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 /etc/X11/xdm/Xservers $USER
and in Xreset:
       sessreg -d -l $DISPLAY -x /etc/X11/xdm/Xservers $USER
 
OPTIONS
- 
-w wtmp-file
- 
This specifies an alternate wtmp file, instead of /var/log/wtmp. The special name "none" disables writing records to the wtmp file.
- 
-u utmp-file
- 
This specifies an alternate utmp file, instead of /var/run/utmp. The special name "none" disables writing records to the utmp file.
- 
-L lastlog-file
- 
This specifies an alternate lastlog file, instead of __lastlog_file__, if the platform supports lastlog files. The special name "none" disables writing records to the lastlog file.
- 
-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 sessions, 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/ttysfile. 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.
- 
-V
- 
This option causes the command to print its version and exit.
- 
-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), __utmp_manpage__(5)
AUTHOR
 Keith Packard, MIT X Consortium