Xsgi man page on IRIX

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

     NAME
	  Xsgi - X Window System server for Silicon Graphics
	  workstations.

     SYNOPSIS
	  Xsgi [:displaynumber] [-option ...]

     DESCRIPTION
	  Xsgi is the name for the Silicon Graphics, Inc. X Window
	  System server.  The server supports the X version 11
	  protocol, and is based on Release 6 of the X Consortium
	  distribution.	 The X Window System is described in X Window
	  System by Scheifler and Gettys (Digital Press, ISBN 1-
	  55558-088-2).

	  For details on use of the X Window System, it is recommended
	  that you refer to the X Window System User's Guide for
	  Version 11 (Volume III), by Tim O'Reilly, Valerie Quercia,
	  and Linda Lamb (O'Reilly & Associates, ISBN 0-937175-29-3).

	  In addition, you may find the following books to be useful:
	  Xlib Programming Manual (Volume I), by Adrian Nye, O'Reilly
	  & Associates, ISBN 0-937175-26-9 Xlib Reference Manual
	  (Volume II), O'Reilly & Associates, ISBN 0-937175-27-7

     STARTING THE SERVER
	  Xsgi is normally run by the xdm program from init.  However,
	  it may also be started by hand, using the interface
	  described here, or by running xdm by hand.  Details on xdm
	  may be found in the xdm(1) man page.

     HARDWARE SUPPORT
	  In IRIX 4.0 and 5.0, Xsgi exports visuals supporting most
	  available hardware. All servers support 8-bit PseudoColor.
	  24-bit TrueColor is available on equipped machines.
	  Depending on hardware, 2- or 4-bit PseudoColor may be
	  available, possibly for use of overlay planes. Other visuals
	  may be available.  For details on the nature of visuals, see
	  Xlib Programming Manual, described above.  Available visuals
	  may be interrogated with xdpyinfo(1) or, from within a
	  program, via XMatchVisualInfo(3X), or XGetVisualInfo(3X).

     PROTOCOL EXTENSIONS
	  Extensions to the core X protocol may be available on a
	  given instance of Xsgi. Among the several extensions
	  supported at time of writing are Adobe PostScriptTM, X Input
	  Extension (tablet, spaceball, dials, etc), SHAPE (non
	  rectanglular windows) and Xinerama.  Available extensions
	  may be interrogated with xdpyinfo(1), or, from within a
	  program, via XQueryExtension(3X), or XListExtensions(3X).

     OPTIONS

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

	  Xsgi accepts the following command line options:

	  -a pixels
		  sets the mouse acceleration threshold

	  -art timeout
		  sets the keyboard autorepeat timeout

	  -ari interval
		  sets the keyboard autorepeat interval

	  -auth filename
		  selects authorization file

	  bc	  enables bug compatibility mode.  There was a bug in
		  pre-R4 servers which allowed a common protocol
		  violation.  This option asks the server to disable
		  detection of that particular protocol violation. It
		  is supplied solely to allow old programs with the
		  bug to work.

	  -boards boardnumber-range
		  specifies the graphics boards that the X server
		  should use.  boardnumber-range is either a single
		  number or a comma separated list of numbers
		  specifying the desired graphics boards.  The
		  graphics board numbers can be determined by
		  examining the report from gfxinfo(1G). For example,
		  to tell the X server to use graphics board 2 use
		  -boards 2.  To tell the X server to use graphics
		  boards 0 and 1 use -boards 0,1.  The default
		  behavior is for the X server to use all available
		  graphics boards.

	  -boardbase hexInt
		  sets base address of board communication space

	  -boardsize hexInt
		  sets amount of space to reserve per board in bytes

	  -bs	  disables backing store support on all screens

	  -c	  turns off key-click

	  c percent
		  sets key-click volume (0-100).  Note: currently, the
		  volume has two states: on and off.

	  -class className
		  sets class of default visual

	  -co filename

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

		  sets name of RGB color database.  The default is
		  /usr/lib/X11/rgb

	  -cursorFG color-name
		  specifies the initial foreground color for the
		  cursor.

	  -cursorBG color-name
		  specifies the initial background color for the
		  cursor.

	  -ddxdir path
		  specifies directory to use for dynamic DDX modules
		  (which are dynamic shared objects for IRIX 5.x and
		  6.x).	 The default is /usr/lib/X11/dyDDX.

	  -depth int
		  sets depth of default visual

	  -devdir path
		  specifies directory to use for input devices.	 The
		  default is /dev/input.

	  -dpi int
		  sets screen resolution pixels per inch

	  -f percent
		  sets the bell base volume

	  -fc cursorFont
		  sets default cursor font.  This defaults to cursor.

	  -first  prevents the server from opening any but the first
		  available screen.

	  -fn font
		  sets the server default font.	 This defaults to
		  fixed.

	  -fp fontPath
		  sets the search path for fonts.  This defaults to
		  /usr/lib/X11/fonts/100dpi/,
		  /usr/lib/X11/fonts/75dpi/, /usr/lib/X11/fonts/misc/,
		  /usr/lib/X11/fonts/Type1/,
		  /usr/lib/X11/font/Speedo/, /usr/lib/X11/font/CID/

	  -help	  prints a usage message

	  -hw device
		  specifies options on a per-screen basis. In addition
		  to a board argument, allowed options include class,
		  depth, overlay, pseudomap, staticmap, and visid.  As

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

		  an example, to set up screen 0 of a two-headed
		  system to be 8-bit PseudoColor, and screen 1 to be
		  24-bit TrueColor, you would use
		  -hw board=0,class=PseudoColor,depth=8 -hw
		  board=1,class=TrueColor,depth=24
		  On a multi-headed system, left, right, above, and
		  below allow you to specify the logical relationship
		  of each screen with respect to one another. For
		  example, to specify that display 0 is logically
		  above display 1, you would use
		  -hw board=0,below=1 -hw board=1,above=0
		  If Xinerama extension is enabled for a multi-headed
		  system, xoffset and yoffset allow you to indicate
		  relative offsets of one screen with respect to its
		  neighbours. The value should be negative to indicate
		  an overlap. In the previous example, to indicate
		  that display 1 has an overlap of 60 pixels with
		  display 0, you would use
		  -hw board=0,below=1 -hw board=1,above=0,yoffset=-60

	  -I	  causes Xsgi to ignore all remaining arguments

	  -inputdir path
		  specifies directory to use for input configuration
		  files.  The default is /usr/lib/X11/input.
		  -configdir path specifies directory to use for
		  device-specific configuration files.	The default is
		  /usr/lib/X11/input/config.

	  -kbddev device
		  sets the name of core keyboard device to use.

	  -keymap device
		  sets the name of keymap to use.  Omitting this
		  option causes the server to use its only builtin
		  keymap, which supports the USA keyboard.  Keymap
		  files are named name.xkm.  See -inputdir, above.

	  -logo	  turns on the X Window System logo display in the
		  screen-saver

	  nologo  turns off the X Window System logo display in the
		  screen-saver

	  -maxcliprec clip
		  This switch was introduced because the X shape
		  extension can escalate the number of clipping
		  rectangles that are required to clip an image.  If
		  the number of clipping rectangles exceeds clip,  the
		  image will be rendered non-transparently. If this
		  switch isn't present the server will default to 4000
		  clip rectangles before the image is non transparent.

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

	  -nobitscale
		  do not support scaling of bitmap fonts.  By default
		  Xsgi supports scaling of bitmap fonts to any size.
		  This can often result in rather unreadable glyphs.
		  Type1 and Speedo fonts are still scalable with this
		  option since outline based fonts scale much better
		  than bitmaps.

	  -nooverlays
		  do not support the use of overlay visuals.  This
		  option and the -overlay option cannot be used
		  together since no overlay visuals will be available
		  when using -nooverlays. Also, when using this option
		  the inclusion of the overlay sub-option to the -hw
		  option will fail, resulting in the use of the
		  server's default visual.

		  This option is only applicable to systems with
		  ODYSSEY, KONA, and future graphics types.   The type
		  of graphics found on a system can be queried using
		  the gfxinfo(1G) program.

	  -overlay
		  specifies that the default visual should be in the
		  overlay planes. Gets optionally combined with class
		  and depth.

	  -phantomcursors
		  enables the display of additional hardware cursor
		  images in regions where two (or more) screens
		  partially overlap their screen areas. This is useful
		  for example when Xinerama is enabled and -hw flags
		  have been used to specify negative x or y offset
		  values such that the screens overlap.	 Like
		  Xinerama, this option only has an effect when the X
		  server is managing more than one graphics pipe. It
		  will not have an affect on (single-pipe) multi-
		  channel configurations.

	  -pseudomap string
		  tells how to initialize default PseudoColor
		  colormaps.  String must be one of gl, envm, pseudo,
		  or 4sight.  The setting determines the number of
		  cells preallocated by the server for sharing
		  ReadOnly by clients.	All preallocated cells contain
		  colors which match those in the default GL
		  "colorindex" colormap.  If more cells are
		  preallocated, the default map and maps used by the
		  GL will match better, but fewer cells will be
		  available for allocation by clients.	gl
		  preallocates cells 0-15.  envm preallocates cells

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

		  0-15 and 32-255.  pseudo preallocates only
		  WhitePixel and BlackPixel.  4sight preallocates 0-15
		  and 32-55.

	  -ptrdev string
		  sets name of core pointer device

	  -r	  turns off keyboard auto-repeat

	  r	  turns on keyboard auto-repeat

	  -reportdecompress
		  reports the names of font files being decompressed.

	  -s minutes
		  sets screen-saver timeout time in minutes.  The
		  screen saver may be disabled by setting the timeout
		  to 0.	 The default is 10 minutes.  Note that using
		  xset(1) sets the timeout in seconds.

	  -securityExt
		  enables the X security extension

	  -solidroot color-name
		  starts the server with a solid color for the initial
		  screen; If not specified, the default is a black and
		  white X stipple background.

	  -stacked
		  arranges screens of a multihead server vertically
		  instead of horizontally.  Screen 0 is on the bottom.

	  -staticmap string
		  tells how to initialize default colormaps.  String
		  must be one of gl or cube.  The setting determines
		  the layout of the maps.  gl makes the map look like
		  the GL default map.  cube fills the map with a color
		  cube.	 Please do not be confused by the naming, if
		  you want to set the class of the default colormap,
		  use the -class flag.	This flag only determines what
		  is stored in the colormap.

	  -su	  disables save under support on all screens

	  -t pixels
		  sets the mouse threshold

	  -to seconds
		  sets connection timeout in seconds.

	  ttyxx	  starts server on ttyxx.  For use when starting a
		  server from init.

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

	  v	  turns on video blanking for screen-saver

	  -v	  turns off video blanking for screen-saver

	  -visid int
		  specifies visual ID of default visual. If the number
		  refers to a valid visual, this option overrides
		  class, depth and overlay.
		  NOTE: the set of visual IDs and the visuals they
		  correspond to is device-dependent.  Thus, this set
		  will vary from one board type to the next. Also, for
		  a given board type, there is no guarantee that the
		  set of supported visuals (and their corresponding
		  visual IDs) will not change from one software
		  release to the next.

	  -wm	  forces the default backing-store of all windows to
		  be WhenMapped.  This is not a very good way of
		  getting backing-store to apply to all windows.

	  -wrapx  allows pointer cursor to wrap around in X direction

	  -wrapy  allows pointer cursor to wrap around in Y direction

	  -x extension-name
		  loads the named extension at init time

	  +xinerama
		  enables Xinerama extension. See Xinerama(3X11) for
		  details.

	  -xindex int
		  sets index of X valuator in pointer device

	  -yindex int
		  sets index of Y valuator in pointer device

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

     SECURITY
	  Xsgi uses an access control list for deciding whether or not
	  to accept connections from clients on a particular machine.
	  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 display number of the server.
	  Each line of the file should contain an Internet hostname
	  (eg neon.esd.sgi.com).

	  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.  Please refer to the xhost(1) man
	  page for more information.

	  Unlike some window systems, X does not have any notion of
	  window operation permissions; it places few restrictions on
	  what a client can do.	 If a program can connect to a
	  display, it has full run of the screen and can manipulate
	  most resources it may discover.  See also xauth(1).

     SHARED MEMORY TRANSPORT
	  The default transport for local clients uses shared memory
	  for X server communication.  Clients may use UNIX domain
	  sockets (the previous default transport) by specifying the
	  display as unix:0.  UNIX domain sockets will automatically
	  be used if shared memory is not available.

     INPUT DEVICE SUPPORT
	  Clients access core input devices (pointer and keyboard)
	  using core X protocol requests.  Additional devices may be
	  accessed using the X Input Extension.	 See input(7) for
	  information about configuring input devices.

     SIGNALS
	  The server attaches special meaning to the following
	  signals:

	  SIGHUP  This signal causes Xsgi to close all existing
		  connections, free all resources, and restore all
		  defaults.  It is sent by the display manager
		  whenever the main user's primary client exits or
		  after execution of endsession to force the server to
		  clean up and prepare for the next user.  On many
		  systems, this primary client frequently is an xterm
		  or a window manager.	See endsession(1) and xdm(1)
		  for details.

	  SIGTERM This signal causes Xsgi to exit cleanly.

     FILES
	  /usr/lib/X11/xdm/Xservers
			      the default server file used by xdm,

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

			      supplying options which will be passed
			      to Xsgi.

     SEE ALSO
	  X(1), xdm(1), xauth(1), xhost(1), xdpyinfo(1), input(7),
	  endsession(1), 4Dwm(1), twm(1), xterm(1), xset(1),
	  xsetroot(1), mkfontdir(1), xinit(1), Xinerama(3X11),
	  Xserver(1), gfxinfo(1G).

     BUGS
	  The option syntax is inconsistent with itself and xset(1).

	  If Xsgi dies before its clients, new clients won't be able
	  to connect until all existing connections have their TCP
	  TIME_WAIT timers expire.

	  Xdmcp doesn't support DES.

	  Bell Volume is not configurable on older SGI architectures.

	  Backing store does not correctly operate on windows which
	  have OpenGL or IRIS GL contexts bound to them.  Since GL
	  programs render directly to the graphics hardware, the X
	  server has no ability to correctly retain rendering for
	  obscured regions of such windows.

	  Backing store is not recommended as a performance
	  enhancement to windows containing simple graphics.  Backing
	  store is more expensive for deeper windows.

	  Read-modify-write rasterops can be slow on some older SGI
	  architectures.

	  Certain use patterns can cause severe fragmentation of
	  memory in the server.	 This can lead to large resident core
	  sizes even though core is not leaking.  Since the default
	  configuration resets (but does not restart) the server
	  between users, the process may become large without
	  opportunity to shrink.  Consequently, performance may suffer
	  as a result of paging, etc.  Process size may be examined
	  with ps(1).  Should this occur, the server should be
	  terminated and restarted.  This can be done via kill(1) or,
	  if xdm(1) is used, by changing the terminateServer entry in
	  /usr/lib/X11/xdm/xdm-config to True.

	  In IRIX 5.0, a new memory allocation scheme is supported in
	  Xsgi that allows large allocated memory chunks to be
	  returned to the operating system.  This should minimize
	  fragmentation problems.

	  The standard -dpi option for setting the monitor screen
	  resolution is accepted but not used by Xsgi. Most SGI

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     XSGI(1)		 X Version 11 (Release 6)	       XSGI(1)

	  workstations have monitor-detect logic so Xsgi will
	  correctly determine the size and resolution.

     ADDITIONAL DOCUMENTATION
	  Additional documentation for developers of X Window System
	  clients is available on-line and directly from the X
	  consortium.

	  X Consortium
	  201 Broadway
	  Cambridge MA 02139-1955
	  Tel: 617-374-1000
	  Fax: 617-374-1025
	  membership@x.org
	  http://www.x.org/

     COPYRIGHT
	  Copyright 1989-91 Silicon Graphics Inc.
	  Copyright 1987-91, Massachusetts Institute of Technology.
	  See X(1) for a full statement of rights and permissions.

     Page 10					     (printed 7/20/06)

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