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winsysck(1)							   winsysck(1)

NAME
       winsysck - check which window system protocols are available

SYNOPSIS
       winsysck [ -va ] [ -display displaystring ] [ -timeout seconds ] proto‐
       col [...]

DESCRIPTION
       The winsysck command determines if the specified window system protocol
       is  available  to  the user.  By default, the winsysck command exits as
       soon as the first available protocol is found, although this  behaviour
       can be modified by the -a option (see below).

OPTIONS
       The  following  options can be used to modify the behaviour of the win‐
       sysck command.

       -a     Continue to check the availability of  the  specified  protocols
	      even  after  determining	that  one or more previously specified
	      protocols are available.	This is not particularly useful	 with‐
	      out the -v option (see below).

       -v     Print  the  name of the first available protocol on the standard
	      output.  When combined with the -a option (see above), print the
	      name  of	all  available protocols on the standard output, sepa‐
	      rated by newlines.

       -display displaystring
	      Use the display displaystring when trying to  determine  if  the
	      x11 protocol is available.

       -timeout seconds
	      The  timeout  option  sets the number of seconds before the win‐
	      sysck will time out.

KNOWN PROTOCOLS
       The following are known values for protocol.

       x11    Determines if a connection can be made using the X11 Window Sys‐
	      tem protocol.

       news   Determines  if a connection can be made using the Network-exten‐
	      sible Window System protocol.

       x11news
	      Determines if connections can be made to an X11/NeWS server.  In
	      addition	to  being able to establish connections using both the
	      X11 Window System and Network-extensible	Window	System	proto‐
	      cols, this requires that these two connections actually interact
	      with the same window server.

       sunview
	      Determines if connections can be made using the  SunView	Window
	      System protocol.

EXAMPLES
       Determine if an X11 Window System connection can be made:

	      example% if winsysck x11 ; then ...

       Determine if an X11 Window System connection can be made to the display
       “displayhost:0.0”:

	      example% if winsysck -display displayhost:0.0 x11 ; then ...

       Print the known protocols which are available:

	      example% winsysck -v -a x11 news x11news sunview

       Print which window system should be used, given the preference for NeWS
       over SunView, and X11/NeWS over NeWS:

	      example% winsysck -v x11news news sunview

SEE ALSO
       Xsun(1)

LIMITATIONS
       There  is  no way to determine whether a SunView connection is actually
       connected to an X11/NeWS server with SunView compatability  enabled  or
       to a SunView server.

BUGS
       None known.

DIAGNOSTICS
       Exit  status  is 0 if any protocols are available, 1 if none are avail‐
       able, 2 for usage errors.

				19 October 1990			   winsysck(1)

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