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XSERVER(1)							    XSERVER(1)

NAME
       Xserver - X Window System display server

SYNOPSIS
       X [option ...]

DESCRIPTION
       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	 driv-
       ing the most frequently used server on a	given machine.

STARTING THE SERVER
       The  X  server  is  usually  started from the X Display Manager program
       xdm(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  ses-
       sions.

       Installations  that run more than one window system may need to use the
       xinit(1)	utility	instead	of a display manager.  However,	xinit is to be
       considered  a tool for building startup scripts and is not intended for
       use by end users.  Site administrators are strongly urged to use	a dis-
       play manager, or	build other interfaces for novice users.

       The  X  server  may  also  be started directly by the user, though this
       method is usually reserved for testing and is not recommended for  nor-
       mal  operation.	 On some platforms, the	user must have special permis-
       sion to start the X server, often because  access  to  certain  devices
       (e.g. /dev/mouse) is restricted.

       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.

OPTIONS
       Many X servers have device-specific command line	options.  See the man-
       ual pages for the individual  servers  for  more	 details;  a  list  of
       server-specific manual pages is provided	in the SEE ALSO	section	below.

       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.

       :displaynumber
	       The  X server runs as the given displaynumber, 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 X(7) manual	page to	learn how  to  specify
	       which display number clients should try to use.

       -a number
	       sets  pointer  acceleration  (i.e.  the	ratio  of  how much is
	       reported	to how much the	user actually moved the	pointer).

       -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.

       -audit level
	       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 vio-
	       lations of the security policy.	Level 0	turns  off  the	 audit
	       trail.  Audit lines are sent as standard	error output.

       -auth authorization-file
	       specifies  a  file which	contains a collection of authorization
	       records used to authenticate access.  See also the  xdm(1)  and
	       Xsecurity(7) manual pages.

       bc      disables	certain	kinds of error checking, for bug compatibility
	       with previous releases (e.g., to	work around bugs in R2 and  R3
	       xterms and toolkits).  Deprecated.

       -bs     disables	backing	store support on all screens.

       -br     sets  the  default  root	 window	 to solid black	instead	of the
	       standard	root weave pattern.

       -c      turns off key-click.

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

       -cc class
	       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.

       -co filename
	       sets  name   of	 RGB   color   database.    The	  default   is
	       /usr/X11R6/lib/X11/rgb.

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

       -deferglyphs whichfonts
	       specifies  the  types  of  fonts	 for  which  the server	should
	       attempt to use deferred glyph loading.  whichfonts can  be  all
	       (all fonts), none (no fonts), or	16 (16 bit fonts only).

       -dpi resolution
	       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.

       dpms    enables	DPMS  (display	power management services), where sup-
	       ported.	The default state is platform and  configuration  spe-
	       cific.

       -dpms   disables	DPMS (display power management services).  The default
	       state is	platform and configuration specific.

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

       -fc cursorFont
	       sets default cursor font.

       -fn font
	       sets the	default	font.

       -fp fontPath
	       sets the	search path for	fonts.	This path is a comma separated
	       list  of	directories which the X	server searches	for font data-
	       bases.  See the FONTS section of	 this  manual  page  for  more
	       information and the default list.

       -help   prints a	usage message.

       -I      causes all remaining command line arguments to be ignored.

       -maxbigreqsize size
	       sets the	maxmium	big request to size MB.

       -nolisten trans-type
	       disables	a transport type.  For example,	TCP/IP connections can
	       be disabled with	-nolisten tcp.	This option may	be issued mul-
	       tiple  times to disable listening to different transport	types.

       -noreset
	       prevents	a server reset when  the  last	client	connection  is
	       closed.	 This  overrides  a  previous  -terminate command line
	       option.

       -p minutes
	       sets screen-saver pattern cycle time in minutes.

       -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.

       -nopn   causes the server to exit if it fails to	establish all  of  its
	       well-known sockets (connection points for clients).

       -r      turns off auto-repeat.

       r       turns on	auto-repeat.

       -s minutes
	       sets screen-saver timeout time in minutes.

       -su     disables	save under support on all screens.

       -t number
	       sets  pointer  acceleration threshold in	pixels (i.e. after how
	       many pixels pointer acceleration	should take effect).

       -terminate
	       causes the server to terminate at server	reset, instead of con-
	       tinuing	to  run.   This	 overrides a previous -noreset command
	       line option.

       -to seconds
	       sets default connection timeout in seconds.

       -tst    disables	all testing extensions (e.g., XTEST,  XTrap,  XTestEx-
	       tension1, RECORD).

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

       v       sets video-off screen-saver preference.

       -v      sets video-on screen-saver preference.

       -wm     forces  the  default  backing-store  of all windows to be When-
	       Mapped.	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.

       -x extension
	       loads the specified extension at	init.  This  is	 a  no-op  for
	       most implementations.

       [+-]xinerama
	       enables(+)  or disables(-) the XINERAMA extension.  The default
	       state is	platform and configuration specific.

SERVER DEPENDENT OPTIONS
       Some X servers accept the following options:

       -ld kilobytes
	       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.

       -lf files
	       sets the	number-of-open-files limit of the server to the	speci-
	       fied number.  A value of	zero makes the limit as	large as  pos-
	       sible.  The default value of -1 leaves the limit	unchanged.

       -ls kilobytes
	       sets  the stack space limit of the server to the	specified num-
	       ber 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.

       -logo   turns on	the X Window System logo display in the	 screen-saver.
	       There is	currently no way to change this	from a client.

       nologo  turns off the X Window System logo display in the screen-saver.
	       There is	currently no way to change this	from a client.

       -render default|mono|gray|color sets the	color allocation  policy  that
	       will be used by the render extension.

	       default selects	the  default  policy  defined  for the display
		       depth of	the X server.

	       mono    don't use any color cell.

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

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

       -dumbSched
	       disables	smart scheduling on platforms that support  the	 smart
	       scheduler.

       -schedInterval interval
	       sets the	smart scheduler's scheduling interval to interval mil-
	       liseconds.

XDMCP OPTIONS
       X servers that support XDMCP have the following	options.   See	the  X
       Display Manager Control Protocol	specification for more information.

       -query hostname
	       enables	XDMCP  and  sends Query	packets	to the specified host-
	       name.

       -broadcast
	       enable XDMCP and	broadcasts BroadcastQuery packets to the  net-
	       work.   The first responding display manager will be chosen for
	       the session.

       -multicast [address [hop	count]]
	       Enable XDMCP and	multicast BroadcastQuery packets to the	  net-
	       work.   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 mul-
	       ticast.	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.

       -indirect hostname
	       enables XDMCP and send IndirectQuery packets to	the  specified
	       hostname.

       -port port-number
	       uses  the  specified  port-number for XDMCP packets, instead of
	       the default.  This option must be specified before any  -query,
	       -broadcast, -multicast, or -indirect options.

       -from local-address
	       specifies the local address to connect from (useful if the con-
	       necting host has	 multiple  network  interfaces).   The	local-
	       address	may  be	 expressed  in any form	acceptable to the host
	       platform's gethostbyname(3) implementation.

       -once   causes the server to terminate (rather  than  reset)  when  the
	       XDMCP session ends.

       -class display-class
	       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).

       -cookie xdm-auth-bits
	       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!).

       -displayID display-id
	       Yet  another  XDMCP specific value, this	one allows the display
	       manager to identify each	display	so  that  it  can  locate  the
	       shared key.

XKEYBOARD OPTIONS
       X  servers  that	 support the XKEYBOARD (a.k.a. "XKB") 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	speci-
       fied as the relative path from the XKB base directory.  The default XKB
       base directory is /usr/X11R6/lib/X11/xkb.

       [+-]kb  enables(+) or disables(-) the XKEYBOARD extension.

       [+-]accessx [ timeout [ timeout_mask [ feedback [ options_mask ]	] ] ]
	       enables(+) or disables(-) AccessX key sequences.

       -xkbdir directory
	       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).

       -ar1 milliseconds
	       sets  the autorepeat delay (length of time in milliseconds that
	       a key must be depressed before autorepeat starts).

       -ar2 milliseconds
	       sets the	autorepeat interval (length of	time  in  milliseconds
	       that should elapse between autorepeat-generated keystrokes).

       -noloadxkb
	       disables	 loading  of  an  XKB  keymap  description  on	server
	       startup.

       -xkbdb filename
	       uses filename for default keyboard keymaps.

       -xkbmap filename
	       loads keyboard description in filename on server	startup.

SECURITY EXTENSION OPTIONS
       X servers that support the  SECURITY  extension	accept	the  following
       option:

       -sp filename
	       causes  the server to attempt to	read and interpret filename as
	       a security policy file with the format  described  below.   The
	       file is read at server startup and reread at each server	reset.

       The syntax of the security policy file is as  follows.	Notation:  "*"
       means  zero or more occurrences of the preceding	element, and "+" means
       one or more occurrences.	 To interpret <foo/bar>, ignore	the text after
       the /; it is used to distinguish	between	instances of <foo> in the next
       section.

       <policy file> ::= <version line>	<other line>*

       <version	line> ::= <string/v> '\n'

       <other line > ::= <comment> | <access rule> | <site policy> | <blank line>

       <comment> ::= # <not newline>* '\n'

       <blank line> ::=	<space>	'\n'

       <site policy> ::= sitepolicy <string/sp>	'\n'

       <access rule> ::= property <property/ar>	<window> <perms> '\n'

       <property> ::= <string>

       <window>	::= any	| root | <required property>

       <required property> ::= <property/rp> | <property with value>

       <property with value> ::= <property/rpv>	= <string/rv>

       <perms> ::= [ <operation> | <action> | <space> ]*

       <operation> ::= r | w | d

       <action>	::= a |	i | e

       <string>	::= <dbl quoted	string>	| <single quoted string> | <unqouted string>

       <dbl quoted string> ::= <space> " <not dqoute>* " <space>

       <single quoted string> ::= <space> ' <not squote>* ' <space>

       <unquoted string> ::= <space> <not space>+ <space>

       <space> ::= [ ' ' | '\t'	]*

       Character sets:

       <not newline> ::= any character except '\n'
       <not dqoute>  ::= any character except "
       <not squote>  ::= any character except '
       <not space>   ::= any character except those in <space>

       The semantics associated	with the above syntax are as follows.

       <version	line>, the first line in the file, specifies the  file	format
       version.	  If  the server does not recognize the	version	<string/v>, it
       ignores the rest	of the file.  The version string for the  file	format
       described here is "version-1" .

       Once  past the <version line>, lines that do not	match the above	syntax
       are ignored.

       <comment> lines are ignored.

       <sitepolicy> lines are currently	ignored.  They are intended to specify
       the site	policies used by the XC-QUERY-SECURITY-1 authorization method.

       <access rule> lines specify how the server should  react	 to  untrusted
       client  requests	that affect the	X Window property named	<property/ar>.
       The rest	of this	section	describes the  interpretation  of  an  <access
       rule>.

       For  an	<access	 rule>	to apply to a given instance of	<property/ar>,
       <property/ar> must be on	a window that is in the	set of windows	speci-
       fied  by	 <window>.   If	 <window>  is  any, the	rule applies to	<prop-
       erty/ar>	on any window.	If <window>  is	 root,	the  rule  applies  to
       <property/ar> only on root windows.

       If  <window> is <required property>, the	following apply.  If <required
       property> is a <property/rp>, the rule applies when the window also has
       that <property/rp>, regardless of its value.  If	<required property> is
       a <property with	value>,	<property/rpv> must also have the value	speci-
       fied  by	<string/rv>.  In this case, the	property must have type	STRING
       and format 8, and should	contain	one or more  null-terminated  strings.
       If any of the strings match <string/rv>,	the rule applies.

       The  definition of string matching is simple case-sensitive string com-
       parison with one	elaboration: the occurrence of the  character  '*'  in
       <string/rv> is a	wildcard meaning "any string."	A <string/rv> can con-
       tain multiple wildcards anywhere	in  the	 string.   For	example,  "x*"
       matches	strings	 that begin with x, "*x" matches strings that end with
       x, "*x*"	matches	strings	containing x, and "x*y*" matches strings  that
       start with x and	subsequently contain y.

       There  may  be  multiple	<access	rule> lines for	a given	<property/ar>.
       The rules are tested in the order that they appear in  the  file.   The
       first rule that applies is used.

       <perms>	specify	operations that	untrusted clients may attempt, and the
       actions that the	server should take in response to those	operations.

       <operation> can be r (read), w (write), or d (delete).	The  following
       table shows how X Protocol property requests map	to these operations in
       The Open	Group server implementation.

       GetProperty    r, or r and d if delete =	True
       ChangeProperty w
       RotateProperties	   r and w
       DeleteProperty d
       ListProperties none, untrusted clients can always list all properties

       <action>	can be a (allow), i (ignore), or e (error).  Allow means  exe-
       cute  the request as if it had been issued by a trusted client.	Ignore
       means treat the request as a no-op.  In the case	of GetProperty,	ignore
       means return an empty property value if the property exists, regardless
       of its actual value.  Error means do not	execute	the request and	return
       a  BadAtom  error with the atom set to the property name.  Error	is the
       default action for all properties, including those not  listed  in  the
       security	policy file.

       An  <action> applies to all <operation>s	that follow it,	until the next
       <action>	is encountered.	 Thus, irwad  means  ignore  read  and	write,
       allow delete.

       GetProperty  and	 RotateProperties may do multiple operations (r	and d,
       or r and	w).  If	different actions apply	to the	operations,  the  most
       severe  action  is  applied  to	the whole request; there is no partial
       request execution.  The severity	ordering is: allow < ignore  <	error.
       Thus,  if  the  <perms>	for  a	property  are ired (ignore read, error
       delete),	and an untrusted client	attempts GetProperty on	that  property
       with  delete  =	True,  an error	is returned, but the property value is
       not.  Similarly,	if any of the properties in a RotateProperties do  not
       allow  both  read  and write, an	error is returned without changing any
       property	values.

       Here is an example security policy file.

       version-1

       # Allow reading of application resources, but not writing.
       property	RESOURCE_MANAGER     root      ar iw
       property	SCREEN_RESOURCES     root      ar iw

       # Ignore	attempts to use	cut buffers.  Giving errors causes apps	to crash,
       # and allowing access may give away too much information.
       property	CUT_BUFFER0	     root      irw
       property	CUT_BUFFER1	     root      irw
       property	CUT_BUFFER2	     root      irw
       property	CUT_BUFFER3	     root      irw
       property	CUT_BUFFER4	     root      irw
       property	CUT_BUFFER5	     root      irw
       property	CUT_BUFFER6	     root      irw
       property	CUT_BUFFER7	     root      irw

       # If you	are using Motif, you probably want these.
       property	_MOTIF_DEFAULT_BINDINGS	       rootar iw
       property	_MOTIF_DRAG_WINDOW   root      ar iw
       property	_MOTIF_DRAG_TARGETS  any       ar iw
       property	_MOTIF_DRAG_ATOMS    any       ar iw
       property	_MOTIF_DRAG_ATOM_PAIRS	       any ar iw

       # The next two rules let	xwininfo -tree work when untrusted.
       property	WM_NAME		     any       ar

       # Allow read of WM_CLASS, but only for windows with WM_NAME.
       # This might be more restrictive	than necessary,	but demonstrates
       # the <required property> facility, and is also an attempt to
       # say "top level	windows	only."
       property	WM_CLASS	     WM_NAME   ar

       # These next three let xlsclients work untrusted.  Think	carefully
       # before	including these; giving	away the client	machine	name and command
       # may be	exposing too much.
       property	WM_STATE	     WM_NAME   ar
       property	WM_CLIENT_MACHINE    WM_NAME   ar
       property	WM_COMMAND	     WM_NAME   ar

       # To let	untrusted clients use the standard colormaps created by
       # xstdcmap, include these lines.
       property	RGB_DEFAULT_MAP	     root      ar
       property	RGB_BEST_MAP	     root      ar
       property	RGB_RED_MAP	     root      ar
       property	RGB_GREEN_MAP	     root      ar
       property	RGB_BLUE_MAP	     root      ar
       property	RGB_GRAY_MAP	     root      ar

       # To let	untrusted clients use the color	management database created
       # by xcmsdb, include these lines.
       property	XDCCC_LINEAR_RGB_CORRECTION    rootar
       property	XDCCC_LINEAR_RGB_MATRICES      rootar
       property	XDCCC_GRAY_SCREENWHITEPOINT    rootar
       property	XDCCC_GRAY_CORRECTION	       rootar

       # To let	untrusted clients use the overlay visuals that many vendors
       # support, include this line.
       property	SERVER_OVERLAY_VISUALS	       rootar

       # Dumb examples to show other capabilities.

       # oddball property names	and explicit specification of error conditions
       property	"property with spaces"	       'property with "'aw er ed

       # Allow deletion	of Woo-Hoo if window also has property OhBoy with value
       # ending	in "son".  Reads and writes will cause an error.
       property	Woo-Hoo		     OhBoy = "*son"ad

NETWORK	CONNECTIONS
       The X server supports client connections	via a platform-dependent  sub-
       set  of the following transport types: TCPIP, Unix Domain sockets, DEC-
       net, and	several	varieties of SVR4 local	connections.  See the  DISPLAY
       NAMES  section  of  the	X(7) manual page to learn how to specify which
       transport type clients should try to use.

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  Xsecurity(7)
       manual page for information on the operation of these protocols.

       Authorization  data  required  by  the above protocols is passed	to the
       server in a private file	named with  the	 -auth	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 automat-
       ically 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  Xau  manual  page	for  a
       description  of the binary format of this file.	See xauth(1) for main-
       tenance of this file, and distribution of its contents to remote	hosts.

       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 /etc/Xn.hosts, where n is the dis-
       play 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
       family:name  as described in the	xhost(1) manual	page.  There should be
       no leading or trailing spaces on	any lines.  For	example:

	       joesworkstation
	       corporate.company.com
	       star::
	       inet:bigcpu
	       local:

       Users can add or	remove hosts from this	list  and  enable  or  disable
       access  control	using  the  xhost command from the same	machine	as the
       server.

       If the X	FireWall Proxy (xfwp) 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 xfwp.  If xfwp is run without a config-
       uration	file  and thus no sitepolicy is	defined, if xfwp 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 xfwp, the X
       server will deny	the connection.	  See  xfwp(1)	for  more  information
       about this proxy.

       The  X protocol intrinsically does not have any notion of window	opera-
       tion 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 xauth(1)	manual page for	details.  Restrictions are imposed  on
       untrusted clients that curtail the mischief they	can do.	 See the SECU-
       RITY extension specification for	a complete list	of these restrictions.

       Sites  that  have better	authentication and authorization systems might
       wish to make use	of the hooks in	the libraries and the server  to  pro-
       vide additional security	models.

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

       SIGHUP  This  signal  causes  the  server to close all existing connec-
	       tions, free all resources, and restore  all  defaults.	It  is
	       sent  by	 the  display  manager	whenever  the main user's main
	       application (usually an xterm or	window manager)	exits to force
	       the server to clean up and prepare for the next user.

       SIGTERM This signal causes the server to	exit cleanly.

       SIGINT  This  signal  causes  the  server to exit after cleaning	up the
	       DDX/hardware state.  This type of exit is not  as  clean	 as  a
	       SIGTERM,	but is faster, and far better than a SIGKILL.

       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.	 Xdm uses this feature
	       to recognize when connecting to the server is possible.

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 font path.

       The    default	 font	 path	 is    /usr/X11R6/lib/X11/fonts/misc/,
       /usr/X11R6/lib/X11/fonts/TTF/,	     /usr/X11R6/lib/X11/fonts/Speedo/,
       /usr/X11R6/lib/X11/fonts/Type1/,		/usr/X11R6/lib/X11/fonts/CID/,
       /usr/X11R6/lib/X11/fonts/75dpi/,	/usr/X11R6/lib/X11/fonts/100dpi/ .

       The  font  path	can be set with	the -fp	option or by xset(1) after the
       server has started.

FILES
       /etc/Xn.hosts		     Initial access control list  for  display
				     number n

       /usr/X11R6/lib/X11/fonts/misc,/usr/X11R6/lib/X11/fonts/75dpi,/usr/X11R6/lib/X11/fonts/100dpi
				     Bitmap font directories

       /usr/X11R6/lib/X11/fonts/TTF,/usr/X11R6/lib/X11/fonts/Speedo,/usr/X11R6/lib/X11/fonts/Type1
				     Outline font directories

       /usr/X11R6/lib/X11/rgb.txt    Color database

       /tmp/.X11-unix/Xn	     Unix domain socket	for display number n

       /tmp/rcXn		     Kerberos  5 replay	cache for display num-
				     ber n

       /usr/adm/Xnmsgs		     Error log file for	display	 number	 n  if
				     run from init(8)

       /usr/X11R6/lib/X11/xdm/xdm-errors
				     Default  error  log file if the server is
				     run from xdm(1)

SEE ALSO
       General information: X(7)

       Protocols: X Window System Protocol, The	X  Font	 Service  Protocol,  X
       Display Manager Control Protocol

       Fonts:  bdftopcf(1), mkfontdir(1), mkfontscale(1), xfs(1), xlsfonts(1),
       xfontsel(1), xfd(1), X Logical Font Description Conventions

       Security: Xsecurity(7), xauth(1), Xau(1),  xdm(1),  xhost(1),  xfwp(1),
       Security	Extension Specification

       Starting	the server: xdm(1), xinit(1)

       Controlling the server once started: xset(1), xsetroot(1), xhost(1)

       Server-specific	man  pages:  Xdec(1),  XmacII(1),  Xsun(1),  Xnest(1),
       Xvfb(1),	XFree86(1), XDarwin(1).

       Server internal documentation: Definition of the	Porting	Layer for  the
       X v11 Sample Server

AUTHORS
       The  sample server was originally written by Susan Angebranndt, Raymond
       Drewry, Philip Karlton, and Todd	Newman,	from Digital Equipment	Corpo-
       ration,	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.

XFree86				 Version 4.7.0			    XSERVER(1)

NAME | SYNOPSIS | DESCRIPTION | STARTING THE SERVER | OPTIONS | SERVER DEPENDENT OPTIONS | XDMCP OPTIONS | XKEYBOARD OPTIONS | SECURITY EXTENSION OPTIONS | NETWORK CONNECTIONS | GRANTING ACCESS | SIGNALS | FONTS | FILES | SEE ALSO | AUTHORS

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