NAME
sessreg - manage utmpx/wtmpx entries for non-init clients
SYNOPSIS
sessreg [-w
wtmpx-file] [-u
utmpx-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 utmpx/wtmpx 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.
This version of
sessreg is built using the modern POSIX
pututxline(3c) interfaces, which no longer require the slot-number,
ttys-file, or Xservers-file mappings. For compatibility with older versions
and other operating systems, the
-s,
-t, and
-x flags are
accepted, but ignored.
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 wtmpx-file
- This specifies an alternate wtmpx file, instead of
/var/log/wtmp. The special name "none" disables writing
records to the wtmpx file.
- -u utmpx-file
- This specifies an alternate utmpx file, instead of
/var/run/utmp. The special name "none" disables writing
records to the utmpx file.
- -L lastlog-file
- This specifies an alternate lastlog file, instead of
lastlogx, 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 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. This option is accepted for compatibility,
but does nothing in this version of sessreg.
- -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. This option is accepted for compatibility,
but does nothing in this version of sessreg.
- -t ttys-file
- This specifies an alternate file which the -x option
will use to count the number of terminal sessions on a host. This option
is accepted for compatibility, but does nothing in this version of
sessreg.
- -V
- This option causes the command to print its version and
exit.
- -a
- This session should be added to utmpx/wtmpx.
- -d
- This session should be deleted from utmpx/wtmpx. One of
-a/-d must be specified.
SEE ALSO
xdm(1),
utmpx(5),
wtmpx(5)
AUTHOR
Keith Packard, MIT X Consortium