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+.\" $Xorg: Xserver.man,v 1.4 2001/02/09 02:04:07 xorgcvs Exp $

+.\" $XdotOrg: xserver/xorg/doc/Xserver.man.pre,v 1.4 2005/12/23 20:11:12 alanc Exp $

+.\" Copyright 1984 - 1991, 1993, 1994, 1998  The Open Group

+.\"

+.\" Permission to use, copy, modify, distribute, and sell this software and its

+.\" documentation for any purpose is hereby granted without fee, provided that

+.\" the above copyright notice appear in all copies and that both that

+.\" copyright notice and this permission notice appear in supporting

+.\" documentation.

+.\"

+.\" The above copyright notice and this permission notice shall be included

+.\" in all copies or substantial portions of the Software.

+.\"

+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

+.\" IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR

+.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

+.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

+.\" OTHER DEALINGS IN THE SOFTWARE.

+.\"

+.\" Except as contained in this notice, the name of The Open Group shall

+.\" not be used in advertising or otherwise to promote the sale, use or

+.\" other dealings in this Software without prior written authorization

+.\" from The Open Group.

+.\" $XFree86: xc/programs/Xserver/Xserver.man,v 3.31 2004/01/10 22:27:46 dawes Exp $

+.\" shorthand for double quote that works everywhere.

+.ds q \N'34'

+.TH XSERVER 1 __xorgversion__

+.SH NAME

+Xserver \- X Window System display server

+.SH SYNOPSIS

+.B X

+[option ...]

+.SH DESCRIPTION

+.I X

+is the generic name for the X Window System display server.  It is

+frequently a link or a copy of the appropriate server binary for

+driving the most frequently used server on a given machine.

+.SH "STARTING THE SERVER"

+The X server is usually started from the X Display Manager program

+\fIxdm\fP(1) or a similar display manager program.

+This utility is run from the system boot files and takes care of keeping

+the server running, prompting for usernames and passwords, and starting up

+the user sessions.

+.PP

+Installations that run more than one window system may need to use the

+\fIxinit\fP(1) utility instead of a display manager.  However, \fIxinit\fP is

+to be considered a tool for building startup scripts and is not

+intended for use by end users.  Site administrators are \fBstrongly\fP

+urged to use a display manager, or build other interfaces for novice users.

+.PP

+The X server may also be started directly by the user, though this

+method is usually reserved for testing and is not recommended for

+normal operation.  On some platforms, the user must have special

+permission to start the X server, often because access to certain

+devices (e.g. \fI/dev/mouse\fP) is restricted.

+.PP

+When the X server starts up, it typically takes over the display.  If

+you are running on a workstation whose console is the display, you may

+not be able to log into the console while the server is running.

+.SH OPTIONS

+Many X servers have device-specific command line options.  See the manual

+pages for the individual servers for more details; a list of

+server-specific manual pages is provided in the SEE ALSO section below.

+.PP

+All of the X servers accept the command line options described below.

+Some X servers may have alternative ways of providing the parameters

+described here, but the values provided via the command line options

+should override values specified via other mechanisms.

+.TP 8

+.B :\fIdisplaynumber\fP

+The X server runs as the given \fIdisplaynumber\fP, which by default is 0.

+If multiple X servers are to run simultaneously on a host, each must have

+a unique display number.  See the DISPLAY

+NAMES section of the \fIX\fP(__miscmansuffix__) manual page to learn how to

+specify which display number clients should try to use.

+.TP 8

+.B \-a \fInumber\fP

+sets pointer acceleration (i.e. the ratio of how much is reported to how much

+the user actually moved the pointer).

+.TP 8

+.B \-ac

+disables host-based access control mechanisms.  Enables access by any host,

+and permits any host to modify the access control list.

+Use with extreme caution.

+This option exists primarily for running test suites remotely.

+.TP 8

+.B \-audit \fIlevel\fP

+sets the audit trail level.  The default level is 1, meaning only connection

+rejections are reported.  Level 2 additionally reports all successful

+connections and disconnects.  Level 4 enables messages from the

+SECURITY extension, if present, including generation and revocation of

+authorizations and violations of the security policy.

+Level 0 turns off the audit trail.

+Audit lines are sent as standard error output.

+.TP 8

+.B \-auth \fIauthorization-file\fP

+specifies a file which contains a collection of authorization records used

+to authenticate access.  See also the \fIxdm\fP(1) and

+\fIXsecurity\fP(__miscmansuffix__) manual pages.

+.TP 8

+.B \-br

+sets the default root window to solid black instead of the standard root weave

+pattern.   This is the default unless -retro or -wr is specified.

+.TP 8

+.B \-bs

+disables backing store support on all screens.

+.TP 8

+.B \-c

+turns off key-click.

+.TP 8

+.B c \fIvolume\fP

+sets key-click volume (allowable range: 0-100).

+.TP 8

+.B \-cc \fIclass\fP

+sets the visual class for the root window of color screens.

+The class numbers are as specified in the X protocol.

+Not obeyed by all servers.

+.TP 8

+.B \-core

+causes the server to generate a core dump on fatal errors.

+.TP 8

+.B \-deferglyphs \fIwhichfonts\fP

+specifies the types of fonts for which the server should attempt to use

+deferred glyph loading.  \fIwhichfonts\fP can be all (all fonts),

+none (no fonts), or 16 (16 bit fonts only).

+.TP 8

+.B \-dpi \fIresolution\fP

+sets the resolution for all screens, in dots per inch.

+To be used when the server cannot determine the screen size(s) from the

+hardware.

+.TP 8

+.B dpms

+enables DPMS (display power management services), where supported.  The

+default state is platform and configuration specific.

+.TP 8

+.B \-dpms

+disables DPMS (display power management services).  The default state

+is platform and configuration specific.

+.TP 8

+.BI \-extension extensionName

+disables named extension.   If an unknown extension name is specified,

+a list of accepted extension names is printed.

+.TP 8

+.BI \+extension extensionName

+enables named extension.   If an unknown extension name is specified,

+a list of accepted extension names is printed.

+.TP 8

+.B \-f \fIvolume\fP

+sets feep (bell) volume (allowable range: 0-100).

+.TP 8

+.B \-fc \fIcursorFont\fP

+sets default cursor font.

+.TP 8

+.B \-fn \fIfont\fP

+sets the default font.

+.TP 8

+.B \-fp \fIfontPath\fP

+sets the search path for fonts.  This path is a comma separated list

+of directories which the X server searches for font databases.

+See the FONTS section of this manual page for more information and the default

+list.

+.TP 8

+.B \-help

+prints a usage message.

+.TP 8

+.B \-I

+causes all remaining command line arguments to be ignored.

+.TP 8

+.B \-maxbigreqsize \fIsize\fP

+sets the maximum big request to

+.I size

+MB.

+.TP 8

+.B \-nocursor

+disable the display of the pointer cursor.

+.TP 8

+.B \-nolisten \fItrans-type\fP

+disables a transport type.  For example, TCP/IP connections can be disabled

+with

+.BR "\-nolisten tcp" .

+This option may be issued multiple times to disable listening to different

+transport types.

+.TP 8

+.B \-noreset

+prevents a server reset when the last client connection is closed.  This

+overrides a previous

+.B \-terminate

+command line option.

+.TP 8

+.B \-p \fIminutes\fP

+sets screen-saver pattern cycle time in minutes.

+.TP 8

+.B \-pn

+permits the server to continue running if it fails to establish all of

+its well-known sockets (connection points for clients), but

+establishes at least one.  This option is set by default.

+.TP 8

+.B \-nopn

+causes the server to exit if it fails to establish all of its well-known

+sockets (connection points for clients).

+.TP 8

+.B \-r

+turns off auto-repeat.

+.TP 8

+.B r

+turns on auto-repeat.

+.TP 8

+.B -retro

+starts the stipple with the classic stipple and cursor visible.  The default

+is to start with a black root window, and to suppress display of the cursor

+until the first time an application calls XDefineCursor().  For the Xorg

+server, this also sets the default for the DontZap option to FALSE.  For

+kdrive servers, this implies -zap.

+.TP 8

+.B \-s \fIminutes\fP

+sets screen-saver timeout time in minutes.

+.TP 8

+.B \-su

+disables save under support on all screens.

+.TP 8

+.B \-t \fInumber\fP

+sets pointer acceleration threshold in pixels (i.e. after how many pixels

+pointer acceleration should take effect).

+.TP 8

+.B \-terminate

+causes the server to terminate at server reset, instead of continuing to run.

+This overrides a previous

+.B \-noreset

+command line option.

+.TP 8

+.B \-to \fIseconds\fP

+sets default connection timeout in seconds.

+.TP 8

+.B \-tst

+disables all testing extensions (e.g., XTEST, XTrap, XTestExtension1, RECORD).

+.TP 8

+.B tty\fIxx\fP

+ignored, for servers started the ancient way (from init).

+.TP 8

+.B v

+sets video-off screen-saver preference.

+.TP 8

+.B \-v

+sets video-on screen-saver preference.

+.TP 8

+.B \-wm

+forces the default backing-store of all windows to be WhenMapped.  This

+is a backdoor way of getting backing-store to apply to all windows.

+Although all mapped windows will have backing store, the backing store

+attribute value reported by the server for a window will be the last

+value established by a client.  If it has never been set by a client,

+the server will report the default value, NotUseful.  This behavior is

+required by the X protocol, which allows the server to exceed the

+client's backing store expectations but does not provide a way to tell

+the client that it is doing so.

+.TP 8

+.B \-wr

+sets the default root window to solid white instead of the standard root weave

+pattern.

+.TP 8

+.B \-x \fIextension\fP

+loads the specified extension at init.

+This is a no-op for most implementations.

+.TP 8

+.B [+-]xinerama

+enables(+) or disables(-) the XINERAMA extension.  The default state is

+platform and configuration specific.

+.SH SERVER DEPENDENT OPTIONS

+Some X servers accept the following options:

+.TP 8

+.B \-ld \fIkilobytes\fP

+sets the data space limit of the server to the specified number of kilobytes.

+A value of zero makes the data size as large as possible.  The default value

+of \-1 leaves the data space limit unchanged.

+.TP 8

+.B \-lf \fIfiles\fP

+sets the number-of-open-files limit of the server to the specified number.

+A value of zero makes the limit as large as possible.  The default value

+of \-1 leaves the limit unchanged.

+.TP 8

+.B \-ls \fIkilobytes\fP

+sets the stack space limit of the server to the specified number of kilobytes.

+A value of zero makes the stack size as large as possible.  The default value

+of \-1 leaves the stack space limit unchanged.

+.TP 8

+.B \-render

+.BR default | mono | gray | color

+sets the color allocation policy that will be used by the render extension.

+.RS 8

+.TP 8

+.I default

+selects the default policy defined for the display depth of the X

+server.

+.TP 8

+.I mono

+don't use any color cell.

+.TP 8

+.I gray

+use a gray map of 13 color cells for the X render extension.

+.TP 8

+.I color

+use a color cube of at most 4*4*4 colors (that is 64 color cells).

+.RE

+.TP 8

+.B \-dumbSched

+disables smart scheduling on platforms that support the smart scheduler.

+.TP

+.B \-schedInterval \fIinterval\fP

+sets the smart scheduler's scheduling interval to

+.I interval

+milliseconds.

+.SH XDMCP OPTIONS

+X servers that support XDMCP have the following options.

+See the \fIX Display Manager Control Protocol\fP specification for more

+information.

+.TP 8

+.B \-query \fIhostname\fP

+enables XDMCP and sends Query packets to the specified

+.IR hostname .

+.TP 8

+.B \-broadcast

+enable XDMCP and broadcasts BroadcastQuery packets to the network.  The

+first responding display manager will be chosen for the session.

+.TP 8

+.B \-multicast [\fIaddress\fP [\fIhop count\fP]]

+Enable XDMCP and multicast BroadcastQuery packets to the  network.

+The first responding display manager is chosen for the session.  If an

+address is specified, the multicast is sent to that address.  If no

+address is specified, the multicast is sent to the default XDMCP IPv6

+multicast group.  If a hop count is specified, it is used as the maximum

+hop count for the multicast.  If no hop count is specified, the multicast

+is set to a maximum of 1 hop, to prevent the multicast from being routed

+beyond the local network.

+.TP 8

+.B \-indirect \fIhostname\fP

+enables XDMCP and send IndirectQuery packets to the specified

+.IR hostname .

+.TP 8

+.B \-port \fIport-number\fP

+uses the specified \fIport-number\fP for XDMCP packets, instead of the

+default.  This option must be specified before any \-query, \-broadcast,

+\-multicast, or \-indirect options.

+.TP 8

+.B \-from \fIlocal-address\fP

+specifies the local address to connect from (useful if the connecting host

+has multiple network interfaces).  The \fIlocal-address\fP may be expressed

+in any form acceptable to the host platform's \fIgethostbyname\fP(3)

+implementation.

+.TP 8

+.B \-once

+causes the server to terminate (rather than reset) when the XDMCP session

+ends.

+.TP 8

+.B \-class \fIdisplay-class\fP

+XDMCP has an additional display qualifier used in resource lookup for

+display-specific options.  This option sets that value, by default it

+is "MIT-Unspecified" (not a very useful value).

+.TP 8

+.B \-cookie \fIxdm-auth-bits\fP

+When testing XDM-AUTHENTICATION-1, a private key is shared between the

+server and the manager.  This option sets the value of that private

+data (not that it is very private, being on the command line!).

+.TP 8

+.B \-displayID \fIdisplay-id\fP

+Yet another XDMCP specific value, this one allows the display manager to

+identify each display so that it can locate the shared key.

+.SH XKEYBOARD OPTIONS

+X servers that support the XKEYBOARD (a.k.a. \*qXKB\*q) extension accept the

+following options.  All layout files specified on the command line must be

+located in the XKB base directory or a subdirectory, and specified as the

+relative path from the XKB base directory.  The default XKB base directory is

+.IR __projectroot__/lib/X11/xkb .

+.TP 8

+.BR [+-]accessx " [ \fItimeout\fP [ \fItimeout_mask\fP [ \fIfeedback\fP [ \fIoptions_mask\fP ] ] ] ]"

+enables(+) or disables(-) AccessX key sequences.

+.TP 8

+.B \-xkbdir \fIdirectory\fP

+base directory for keyboard layout files.  This option is not available

+for setuid X servers (i.e., when the X server's real and effective uids

+are different).

+.TP 8

+.B \-ardelay \fImilliseconds\fP

+sets the autorepeat delay (length of time in milliseconds that a key must

+be depressed before autorepeat starts).

+.TP 8

+.B \-arinterval \fImilliseconds\fP

+sets the autorepeat interval (length of time in milliseconds that should

+elapse between autorepeat-generated keystrokes).

+.TP 8

+.B \-xkbmap \fIfilename\fP

+loads keyboard description in \fIfilename\fP on server startup.

+.SH "NETWORK CONNECTIONS"

+The X server supports client connections via a platform-dependent subset of

+the following transport types: TCP\/IP, Unix Domain sockets, DECnet,

+and several varieties of SVR4 local connections.  See the DISPLAY

+NAMES section of the \fIX\fP(__miscmansuffix__) manual page to learn how to

+specify which transport type clients should try to use.

+.SH GRANTING ACCESS

+The X server implements a platform-dependent subset of the following

+authorization protocols: MIT-MAGIC-COOKIE-1, XDM-AUTHORIZATION-1,

+XDM-AUTHORIZATION-2, SUN-DES-1, and MIT-KERBEROS-5.  See the

+\fIXsecurity\fP(__miscmansuffix__) manual page for information on the

+operation of these protocols.

+.PP

+Authorization data required by the above protocols is passed to the

+server in a private file named with the \fB\-auth\fP command line

+option.  Each time the server is about to accept the first connection

+after a reset (or when the server is starting), it reads this file.

+If this file contains any authorization records, the local host is not

+automatically allowed access to the server, and only clients which

+send one of the authorization records contained in the file in the

+connection setup information will be allowed access.  See the

+\fIXau\fP manual page for a description of the binary format of this

+file.  See \fIxauth\fP(1) for maintenance of this file, and distribution

+of its contents to remote hosts.

+.PP

+The X server also uses a host-based access control list for deciding

+whether or not to accept connections from clients on a particular machine.

+If no other authorization mechanism is being used,

+this list initially consists of the host on which the server is running as

+well as any machines listed in the file \fI/etc/X\fBn\fI.hosts\fR, where

+\fBn\fP is the display number of the server.  Each line of the file should

+contain either an Internet hostname (e.g. expo.lcs.mit.edu) or a DECnet

+hostname in double colon format (e.g. hydra::) or a complete name in the format

+\fIfamily\fP:\fIname\fP as described in the \fIxhost\fP(1) manual page.

+There should be no leading or trailing spaces on any lines.  For example:

+.sp

+.in +8

+.nf

+joesworkstation

+corporate.company.com

+star::

+inet:bigcpu

+local:

+.fi

+.in -8

+.PP

+Users can add or remove hosts from this list and enable or disable access

+control using the \fIxhost\fP command from the same machine as the server.

+.PP

+If the X FireWall Proxy (\fIxfwp\fP) is being used without a sitepolicy,

+host-based authorization must be turned on for clients to be able to

+connect to the X server via the \fIxfwp\fP.  If \fIxfwp\fP is run without

+a configuration file and thus no sitepolicy is defined, if \fIxfwp\fP

+is using an X server where xhost + has been run to turn off host-based

+authorization checks, when a client tries to connect to this X server

+via \fIxfwp\fP, the X server will deny the connection.  See \fIxfwp\fP(1)

+for more information about this proxy.

+.PP

+The X protocol intrinsically does not have any notion of window operation

+permissions or place any restrictions on what a client can do; if a program can

+connect to a display, it has full run of the screen.

+X servers that support the SECURITY extension fare better because clients

+can be designated untrusted via the authorization they use to connect; see

+the \fIxauth\fP(1) manual page for details.  Restrictions are imposed

+on untrusted clients that curtail the mischief they can do.  See the SECURITY

+extension specification for a complete list of these restrictions.

+.PP

+Sites that have better

+authentication and authorization systems might wish to make

+use of the hooks in the libraries and the server to provide additional

+security models.

+.SH SIGNALS

+The X server attaches special meaning to the following signals:

+.TP 8

+.I SIGHUP

+This signal causes the server to close all existing connections, free all

+resources, and restore all defaults.  It is sent by the display manager

+whenever the main user's main application (usually an \fIxterm\fP or window

+manager) exits to force the server to clean up and prepare for the next

+user.

+.TP 8

+.I SIGTERM

+This signal causes the server to exit cleanly.

+.TP 8

+.I SIGUSR1

+This signal is used quite differently from either of the above.  When the

+server starts, it checks to see if it has inherited SIGUSR1 as SIG_IGN

+instead of the usual SIG_DFL.  In this case, the server sends a SIGUSR1 to

+its parent process after it has set up the various connection schemes.

+\fIXdm\fP uses this feature to recognize when connecting to the server

+is possible.

+.SH FONTS

+The X server can obtain fonts from directories and/or from font servers.

+The list of directories and font servers

+the X server uses when trying to open a font is controlled

+by the \fIfont path\fP.

+.LP

+The default font path is

+__default_font_path__ .

+.LP

+A special kind of directory can be specified using the \fBcatalogue\fP:

+prefix. Directories specified this way can contain symlinks pointing to the

+real font directories. See the FONTPATH.D section for details.

+.LP

+The font path can be set with the \fB\-fp\fP option or by \fIxset\fP(1)

+after the server has started.

+.SH "FONTPATH.D"

+You can specify a special kind of font path in the form \fBcatalogue:<dir>\fR.

+The directory specified after the catalogue: prefix will be scanned for symlinks

+and each symlink destination will be added as a local fontfile FPE.

+.PP

+The symlink can be suffixed by attributes such as '\fBunscaled\fR', which

+will be passed through to the underlying fontfile FPE. The only exception is

+the newly introduced '\fBpri\fR' attribute, which will be used for ordering

+the font paths specified by the symlinks.

+

+An example configuration:

+

+.nf

+    75dpi:unscaled:pri=20 \-> /usr/share/X11/fonts/75dpi

+    ghostscript:pri=60 \-> /usr/share/fonts/default/ghostscript

+    misc:unscaled:pri=10 \-> /usr/share/X11/fonts/misc

+    type1:pri=40 \-> /usr/share/X11/fonts/Type1

+    type1:pri=50 \-> /usr/share/fonts/default/Type1

+.fi

+

+This will add /usr/share/X11/fonts/misc as the first FPE with the attribute

+'unscaled', second FPE will be /usr/share/X11/fonts/75dpi, also with

+the attribute unscaled etc. This is functionally equivalent to setting

+the following font path:

+

+.nf

+    /usr/share/X11/fonts/misc:unscaled,

+    /usr/share/X11/fonts/75dpi:unscaled,

+    /usr/share/X11/fonts/Type1,

+    /usr/share/fonts/default/Type1,

+    /usr/share/fonts/default/ghostscript

+.fi

+

+.SH FILES

+.TP 30

+.I /etc/X\fBn\fP.hosts

+Initial access control list for display number \fBn\fP

+.TP 30

+.IR __datadir__/fonts/X11/misc , __datadir__/fonts/X11/75dpi , __datadir__/fonts/X11/100dpi

+Bitmap font directories

+.TP 30

+.IR __datadir__/fonts/X11/TTF , __datadir__/fonts/X11/Type1

+Outline font directories

+.TP 30

+.I /tmp/.X11-unix/X\fBn\fP

+Unix domain socket for display number \fBn\fP

+.TP 30

+.I /usr/adm/X\fBn\fPmsgs

+Error log file for display number \fBn\fP if run from \fIinit\fP(__adminmansuffix__)

+.TP 30

+.I __projectroot__/lib/X11/xdm/xdm-errors

+Default error log file if the server is run from \fIxdm\fP(1)

+.SH "SEE ALSO"

+General information: \fIX\fP(__miscmansuffix__)

+.PP

+Protocols:

+.I "X Window System Protocol,"

+.I "The X Font Service Protocol,"

+.I "X Display Manager Control Protocol"

+.PP

+Fonts: \fIbdftopcf\fP(1), \fImkfontdir\fP(1), \fImkfontscale\fP(1),

+\fIxfs\fP(1), \fIxlsfonts\fP(1), \fIxfontsel\fP(1), \fIxfd\fP(1),

+.I "X Logical Font Description Conventions"

+.PP

+Security: \fIXsecurity\fP(__miscmansuffix__), \fIxauth\fP(1), \fIXau\fP(1),

+\fIxdm\fP(1), \fIxhost\fP(1), \fIxfwp\fP(1),

+.I "Security Extension Specification"

+.PP

+Starting the server: \fIstartx\fP(1), \fIxdm\fP(1), \fIxinit\fP(1)

+.PP

+Controlling the server once started: \fIxset\fP(1), \fIxsetroot\fP(1),

+\fIxhost\fP(1), \fIxinput\fP(1), \fIxrandr\fP(1)

+.PP

+Server-specific man pages:

+\fIXorg\fP(1), \fIXdmx\fP(1), \fIXephyr\fP(1), \fIXnest\fP(1),

+\fIXvfb\fP(1), \fIXquartz\fP(1), \fIXWin\fP(1).

+.PP

+Server internal documentation:

+.I "Definition of the Porting Layer for the X v11 Sample Server"

+.SH AUTHORS

+The sample server was originally written by Susan Angebranndt, Raymond

+Drewry, Philip Karlton, and Todd Newman, from Digital Equipment

+Corporation, with support from a large cast.  It has since been

+extensively rewritten by Keith Packard and Bob Scheifler, from MIT.

+Dave Wiggins took over post-R5 and made substantial improvements.