SESSREG(1) USER COMMANDS 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 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/lib/X11/xdm/Xservers $USER
and in Xreset:
sessreg -a -l $DISPLAY -x /usr/lib/X11/xdm/Xservers $USER
OPTIONS
-w wtmp-file
This specifies an alternate wtmp file, instead of
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SESSREG(1) USER COMMANDS SESSREG(1)
/usr/adm/wtmp for BSD or /etc/wtmp for sysV. The spe-
cial 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)
COPYRIGHT
Copyright 1988, Massachusetts Institute of Technology.
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See X(1) for a full statement of rights and permissions.
AUTHOR
Keith Packard, MIT X Consortium
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