xautolock(l) xautolock(l)
January 16, 2002
NAME
xautolock - fire up programs in case of user inactivity under X
VERSION
This man page applies to xautolock version 2.1.
SYNOPSIS
xautolock [-help] [-version] [-time mins] [-locker locker] [-killtime
killmins] [-killer killer] [-notify margin] [-notifier
notifier] [-bell percent] [-corners xxxx] [-cornerdelay secs]
[-cornerredelay altsecs] [-cornersize pixels] [-secure]
[-resetsaver] [-nocloseout] [-nocloseerr] [-noclose]
[-disable] [-enable] [-toggle] [-exit] [-locknow]
[-unlocknow] [-nowlocker locker] [-restart]
DESCRIPTION
Xautolock monitors the user activity on an X Window display. If none
is detected within mins minutes, a program is started as specified by
the -locker option. Xautolock will typically be used to lock the
screen (hence its primary name) but it really doesn't care what
program you make it start. For this reason, xautolock does not
interfere with the default X screen saver, unless the -resetsaver
option is used. This implies that it is the job of the locker or the
user to take the appropriate actions if the default screen saver is to
be disabled. The only real assumption made by xautolock is that a new
countdown starts as soon as the locker exits.
In the presence of the -notify option, a warning signal will be issued
margin seconds before starting the locker. Warning signals come in two
kinds:
+ You can use the -notifier option to specify the command to be
issued to perform notification.
+ Alternatively, you can let xautolock ring the bell. In this case,
the -bell option specifies the loudness of the signal in percent,
as described in the XBell man page.
You can tell xautolock to take special actions when you move the mouse
into one of the corners of the display and leave it there, by using
the -corners, -cornerdelay, -cornerredelay and -cornersize options.
This works as follows:
The xxxx argument to the -corners option must consist of exactly 4
characters from the following set: '0', '+', '-'. Each one of these
specifies what xautolock should do when the mouse enters a small
square area located in each of the corners of the screen. The corners
are considered in the following order: top left, top right, bottom
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left, bottom right. A '0' indicates that xautolock should ignore the
corner. A '+' indicates that xautolock should start the locker after
secs or altsecs seconds (see below for the difference between both),
unless the mouse is moved or keyboard input is received. A '-'
indicates that xautolock should not start the locker at all. The
pixels argument specifies the size in pixels of the corner areas.
Most users of the -corners option want the locker to activate within a
very short time interval after they move the mouse into a '+' corner.
This can be achieved by specifying a small value for the -cornerdelay
option. However, if the mouse is subsequently left where it is,
xautolock will almost immediately start a new locker right after the
user quits the current one. To prevent this from happening, the
-cornerredelay option can be used to specify the time-out interval to
be used if and only if the mouse is sitting in a `+' corner and has
not been moved since the previous locker exited.
A running xautolock process can be disabled (unless if the -secure
option has been specified), in which case it will not attempt to start
the locker. To disable an already running xautolock process, use the
-disable option. To re-enable it, use -enable. To toggle it between
both states, use -toggle. Using this method is preferable to using
sending it SIGSTOP and SIGCONT signals, because while disabled
xautolock will still be emptying its event queue.
A running xautolock process can also be told to exit (unless if the
-secure option has been specified). To do this, use the -exit option.
The -killtime and -killer options allow, amongst other things, to
implement an additional automatic logout, on top of the automatic
screen locking. In the presence of one or both of these options, a
secondary timeout will be triggered killmins after starting the locker
(unless user activity is detected in the mean time). Upon expiration
of this secondary timer, the killer program is run. Note that, despite
the name of the options, xautolock really doesn't care what the killer
does in reality. If it doesn't (indirectly) cause xautolock to get
killed, and assuming that no user activity is detected, the secondary
trigger will periodically expire every killmins minutes for as long as
the locker runs.
In combination with -killtime and -killer, the -secure option allows
system administrators to enforce xautolock as a part of their security
procedures, and to prevent people from locking shared displays for an
excessive amount of time. One way to achieve this is to start
xautolock (using -secure and optionally -killtime and -killer) from
within XDM's Xsession file in such a way that the session
automatically ends if xautolock itself is killed.
By default xautolock closes stdout and stderr. This prevents the
locker from writing error messages to these files in case you manually
lock your display. The -nocloseout, -nocloseerr and -noclose options
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cause xautolock to not close stdout and/or stderr. On some platforms
users of xnlock will need to use -nocloseout, in order to make
xnlock's witty sayings show up. These options can also be used for
debugging cases in which locker invocation is not successful.
Xautolock is capable of managing multi-headed displays.
OPTIONS
-help Print a help message and exit.
-version Print the version number and exit.
-time Specifies the primary timeout interval. The default is
10 minutes, the minimum is 1 minute, and the maximum
is 1 hour.
-locker Specifies the locker to be used. The default is xlock.
Notice that if locker contains multiple words, it must
be specified between quotes. In order to use your
PATH to locate the program, xautolock feeds the locker
command to /bin/sh, so it should be understandable for
whatever shell your /bin/sh is. Because this typically
is a Bourne shell, ~ expansion most likely will not
work.
-killtime Specifies the secondary timeout in minutes after
starting the locker. This timer is only active as
long as the locker is running, and is reset each time
user activity is detected. If it expires before the
locker exits, the killer command is run. The default
is 20 minutes, the minimum is 10 minutes, and the
maximum is 2 hours. This option is only useful in
conjunction with -killer.
-killer Specifies the killer to be used. The default is none.
Notice that if killer contains multiple words, it must
be specified between quotes. In order to use your
PATH to locate the program, xautolock feeds the killr
command to /bin/sh, so it should be understandable for
whatever shell your /bin/sh is. Because this typically
is a Bourne shell, ~ expansion most likely will not
work.
-notify Warn the user margin seconds before locking. The
default is to not warn the user. If used in
conjunction with -cornerdelay or -cornerredelay, the
notification margin iused is the minimum of margin,
secs and/or altsecs.
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-notifier Specifies the notifier to be used. The default is
none. This option is only useful in conjunction with
-notify. Notice that if notifier contains multiple
words, it must be specified between quotes. In order
to use your PATH to locate the program, xautolock
feeds the notifier command to /bin/sh, so it should be
understandable for whatever shell your /bin/sh is.
Because this typically is a Bourne shell, ~ expansion
most likely will not work.
-bell Specifies the loudness of the notification signal in
the absence of the -notifier option. The default is 40
percent. This option is only useful in conjunction
with -notify.
-corners Define special actions to be taken when the mouse
enters one of the corners of the display. The default
is 0000, which means that no special action is taken.
-cornerdelay Specifies the number of seconds to wait before
reacting to the mouse entering a '+' corner. The
default is 5 seconds.
-cornerredelay Specifies the number of seconds to wait before
reacting again if the current locker exits while the
mouse is sitting in a '+' corner. The default is for
altsecs to equal secs.
-cornersize Specifies the size in pixels of the corner areas. The
default is 10 pixels.
-resetsaver Causes xautolock to reset the X screen saver after
successfully starting the locker. This is typically
used in case the locker is not really intended to lock
the screen, but to replace the default X screen saver.
Note that the default screen saver is not disabled,
only reset. Also note that using -resetsaver will
inferfere with the DPMS monitors, as the power down
time out will also be also reset. The default is not
to reset the screen saver.
See the xset man page for more information about
managing the X screen saver.
-secure Instructs xautolock to run in secure mode. In this
mode, xautolock becomes imune to the effects of
-enable, -disable, -toggle, and -exit. The default is
to honour these actions.
-nocloseout Don't close stdout.
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-nocloseerr Don't close stderr.
-noclose Close neither stdout nor stderr.
-disable Disables an already running xautolock process (if
there is one, and it does not have -secure switched
on). In any case, the current invocation of xautolock
exits.
-enable Enables an already running xautolock process (if there
is one, and it does not have -secure switched on). In
any case, the current invocation of xautolock exits.
-toggle Toggles an already running xautolock process (if there
is one, and it does not have -secure switched on)
between its disabled and enabled modes of operation.
In any case, the current invocation of xautolock
exits.
-exit Causes an already running xautolock process (if there
is one, and it does not have -secure switched on) to
exit. In any case, the current invocation of xautolock
also exits.
-locknow Causes an already running xautolock process (if there
is one, if it does not have -secure switched on, and
is not currently disabled) to lock the display
immediately. In any case, the current invocation of
xautolock exits.
-unlocknow Causes an already running xautolock process (if there
is one, if it does not have -secure switched on, and
is not currently disabled) to unlock the display
immediately (if it's locked) by sending the locker a
SIGTERM signal. In any case, the current invocation of
xautolock exits.
-nowlocker Specifies the locker to be used if the lock is
initiated with -locknow option. The default is to use
the locker program given with -locker option, which
defaults to xlock.
-restart Causes an already running xautolock process (if there
is one and it does not have -secure switched on) to
restart. In any case, the current invocation of
xautolock exits.
RESOURCES
time Specifies the primary timeout. Numerical.
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locker Specifies the locker. No quotes are needed, even if
the locker command contains multiple words.
killtime Specifies the secondary timeout. Numerical.
killer Specifies the killer. No quotes are needed, even if
the killer command contains multiple words.
notify Specifies the notification margin. Numerical.
notifier Specifies the notifier. No quotes are needed, even if
the notifier command contains multiple words.
bell Specifies the notification loudness. Numerical.
corners Specifies the corner behaviour, as explained above.
cornersize Specifies the size of the corner areas. Numerical.
cornerdelay Specifies the delay of a '+' corner. Numerical.
cornerredelay Specifies the alternative delay of a '+' corner.
Numerical.
resetsaver Reset the default X screen saver. Boolean.
nocloseout Don't close stdout. Boolean.
nocloseerr Don't close stderr. Boolean.
noclose Close neither stdout nor stderr. Boolean.
Resources can be specified in your ~/.Xdefaults file, either for class
Xautolock, or for whatever name you renamed xautolock to. This can be
useful in case xautolock is to be used for other purposes than simply
locking the screen. For example: if you have two copies of xautolock,
one called "xmonitor", and one called "xlogout", then both will honour
the following:
Xautolock.corners: ++++
In addition, "xmonitor" will honour:
xmonitor.cornersize: 10
while "xlogout" will honour:
xlogout.cornersize: 5
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Each command line option takes precedence over the corresponding
(default) resource specification.
KNOWN BUGS
The -disable, -enable, -toggle, -exit, -locknow, -unlocknow, and
-restart options depend on access to the X server to do their work.
This implies that they will be suspended in case some other
application has grabbed the server all for itself.
If, when creating a window, an application waits for more than 30
seconds before selecting KeyPress events on non-leaf windows,
xautolock may interfere with the event propagation mechanism. This
effect is theoretical and has never been observed in real life. It can
only occur in case xautolock has been compiled without support for
both the Xidle and the MIT ScreenSaver extensions, or in case the X
server does not support these extensions.
xautolock does not always properly handle the secure keyboard mode of
terminal emulators like xterm, since that mode will prevent xautolock
from noticing the keyboard events occurring on the terminal.
Therefore, xautolock sometimes thinks that there is no keyboard
activity while in reality there is. This can only occur in case
xautolock has been compiled without support for both the Xidle and the
MIT ScreenSaver extensions, or in case the X server does not support
these extensions.
xautolock does not check whether notifier and/or locker are available.
The xautolock resources have dummy resource classes.
SEE ALSO
X(1), xset(1), xlock(1), xnlock(1), xscreensaver(1).
COPYRIGHT
Copyright 1990, 1992-1999, 2001-2002 by Stefan De Troch and Michel
Eyckmans.
Versions 2.0 and above of xautolock are available under version 2 of
the GNU GPL. Earlier versions are available under other conditions.
For more information, see the License file.
AUTHORS
Xautolock was conceived, written, and performed by:
Michel Eyckmans (MCE)
Stefan De Troch
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January 16, 2002
Please send queries for help, feature suggestions, bug reports, etc.
to eyckmans@imec.be.
SPECIAL THANKS TO
Kris Croes
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