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] [-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
/var/log/lastlog, 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.
- -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),
utmpx(5)
AUTHOR¶
Keith Packard, MIT X Consortium