Index Index for
Section 1
Index Alphabetical
listing for X
Bottom of page Bottom of
page		 

XRX(1)


NAME

  XRX - helper program


SYNOPSIS

  xrx [-toolkitoption...] filename


DESCRIPTION

  The helper program may be used with any Web browser to interpret documents
  in the RX MIME type format and start remote applications.

  xrx reads in the RX document specified by its filename, from which it gets
  the list of services the application wants to use. Based on this
  information, xrx sets the various requested services, including creating
  authorization keys if your X server supports the SECURITY extension.	It
  then passes the relevant data, such as the X display name, to the
  application through an HTTP GET request of the associated CGI script. The
  Web server then executes the CGI script to start the application. The
  client runs on the web server host connected to your X server.


INSTALLATION

  You need to configure your web browser to use xrx for RX documents.
  Generally the following line in your $HOME/.mailcap is enough:
  application/x-rx; xrx %s

  However, you may need to refer to your web browser's documentation for
  exact instructions on configuring helper applications.

  Once correctly configured, your browser will activate the helper program
  whenever you retrieve any document of the MIME type application/x-rx.


OPTIONS

  The xrx helper program accepts all of the standard X Toolkit command line
  options such as:

  -xrm resourcestring
	      This option specifies a resource string to be used. There may
	      be several instances of this option on the command line.


RESOURCES

  The application class name of the xrx program is Xrx and it understands the
  following application resource names and classes:

  xrxHasFirewallProxy (class XrxHasFirewallProxy)
	      Specifies whether an X server firewall proxy (see xfwp) is
	      running and should be used. Default is ``False.''

  xrxInternalWebServers (class XrxInternalWebServers)
	      The web servers for which the X server firewall proxy should
	      not be used (only relevant when xrxHasFirewallProxy is
	      ``True''). Its value is a comma separated list of mask/value
	      pairs to be used to filter internal web servers, based on their
	      address. The mask part specifies which segments of the address
	      are to be considered and the value part specifies what the
	      result should match. For instance the following list:
	      255.255.255.0/198.112.45.0, 255.255.255.0/198.112.46.0  matches
	      the address sets: 198.112.45.* and 198.112.46.*. More
	      precisely, the test is (address & mask) == value.

  xrxFastWebServers (class XrxFastWebServers)
	      The web servers for which LBX should not be used. The resource
	      value is a list of address mask/value pairs, as previously
	      described.

  xrxTrustedWebServers (class XrxTrustedWebServers)
	      The web servers from which remote applications should be run as
	      trusted clients. The default is to run remote applications as
	      untrusted clients. The resource value is a list of address
	      mask/value pairs, as previously described.


ENVIRONMENT

  The xrx helper program uses the standard X environment variables such as
  ``DISPLAY'' to get the default X server host and display number. If the RX
  document requests X-UI-LBX service and the default X server does not
  advertise the LBX extension, xrx will look for the environment variable
  ``XREALDISPLAY'' to get a second address for your X server and look for the
  LBX extension there.	When running your browser through lbxproxy you will
  need to set XREALDISPLAY to the actual address of your server if you wish
  remote applications to be able to use LBX across the Internet.

  If the RX document requests XPRINT service, xrx looks for the variable
  ``XPRINTER'' to get the printer name and X Print server address to use. If
  the server address is not specified as part of XPRINTER, xrx uses the first
  one specified through the variable ``XPSERVERLIST'' when it is set. When it
  is not xrx then tries to use the video server as the print server. If the
  printer name is not specified via XPRINTER, xrx looks for it in the
  variables ``PDPRINTER'', then ``LPDEST'', and finally ``PRINTER''

  If you are using a firewall proxy, xrx will look for ``PROXY_MANAGER'' to
  get the address of your proxy manager (see proxymngr).  When not specified
  it will use ":6500" as the default.


KNOWN BUG

  When an authorization key is created for a remote application to use the X
  Print service, the helper program has to create the key with an infinite
  timeout since nobody knows when the application will actually connect to
  the X Print server. Therefore, in this case, the helper program stays
  around to revoke the key when the application goes away (that is when its
  video key expires). However, if the helper program dies unexpectedly the
  print authorization key will never get revoked.


SEE ALSO

  lbxproxy (1),

  The RX Document specification


AUTHOR

  Arnaud Le Hors, X Consortium

Index Index for
Section 1
Index Alphabetical
listing for X
Top of page Top of
page