NAME
Xwrapper.config - configuration options for X server wrapper
DESCRIPTION
/etc/X11/Xwrapper.config
contains a set of flags that determine some of the behavior of Debian's X
server wrapper, which is installed on the system as
R /usr/X11R6/bin/X .
The purpose of the wrapper, and of this configuration file, is twofold.
Firstly, it is intended to implement sound security practices.
Since the X server requires superuser privileges, it may be unwise to
permit just any user on the system to execute it.
Even if the X server is not exploitable in the sense of permitting ordinary
users to gain elevated privileges, a poorly-written or
insufficiently-tested hardware driver for the X server may cause bus
lockups and freeze the system, an unpleasant experience for anyone using it
at the time.
Secondly, a wrapper is a convenient place to set up an execution
environment for the X server distinct from the configurable parameters
of the X server itself.
Xwrapper.config
may be edited by hand, but it is typically configured via
debconf(7),
the Debian configuration tool.
The X server wrapper is part of the
x11-common
Debian package; therefore, the parameters of
Xwrapper.config
may be changed with the command
The format of
Xwrapper.config
is a text file containing a series of lines of the form
where
name
is a variable name containing any combination of numbers, letters, or
underscore (_) characters, and
value
is any combination of letters, numbers, underscores (_), or dashes (-).
value
may also contain spaces as long as there is at least one character from the
list above bounding the space(s) on both sides.
Whitespace before and after
R name ,
R value ,
or the equals sign is legal but ignored.
Any lines not matching the above described legal format are ignored.
Note that this specification may change as the X server wrapper develops.
Available options are:
allowed_users
may be set to one of the following values:
R rootonly ,
R console ,
or
R anybody .
rootonly
indicates that only the root user may start the X server;
console
indicates that root, or any user whose controlling TTY is a
virtual console, may start the X server; and
anybody
indicates that any user may start the X server.
nice_value
may be any integer in the interval [-20,19].
This is used to set the executing X server's process priority.
See
nice(1).
AUTHORS
The X server wrapper was written by Stephen Early, Mark Eichin, and Branden
Robinson for the Debian Project, with valuable contributions from Erik
Troan, Topi Miettinen, and Colin Phipps.
This manual page was written by Branden Robinson with sponsorship from
Progeny Linux Systems.
SEE ALSO
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