xpaaccess(1)							SAORD Documentation						      xpaaccess(1)

NAME

       xpaaccess -  see if template matches registered XPA access points

SYNOPSIS

       xpaaccess [-c] [-h] [-i nsinet] [-m method] [-n] [-t sval,lval] [-u users] -v <template> [type]

OPTIONS

	 -c	       contact each access point individually
	 -h	       print help message
	 -i	       access XPA point on different machine (override XPA_NSINET)
	 -m	       override XPA_METHOD environment variable
	 -n	       return number of matches instead of "yes" or "no"
	 -t [s,l]      set short and long timeouts (override XPA_[SHORT,LONG]_TIMEOUT)
	 -u [users]    XPA points can be from specified users (override XPA_NSUSERS)
	 -v	       print info about each successful access point
	 -V	       print info or error about each access point
	 --version     display version and exit

DESCRIPTION

       xpaaccess returns "yes" to stdout (with a return error code if 1) if there are existing XPA access points that match the template (and
       optional access type: g,i,s). Otherwise, it returns "no" (with a return error code of 0).  If -n is specified, the number of matches is
       returned instead (both to stdout and in the returned error code). If -v is specified, each access point is displayed to stdout instead of
       the number of matches.

       By default, xpaaccess simply contacts the xpans name server to find the list of registered access points that match the specified template.
       It also checks to make sure the specified types are supported by that access point. This is the fastest way to determine available access
       points. However, an access point might registered but not yet available, if, for example, the server program has not entered its event loop
       to process XPA requests. To find access points that are guaranteed to be available for processing, use the -c (contact) switch.  With this
       switch, xpaaccess contacts each matching XPA server (rather than the name server) to make sure the registered access point really is ready
       for processing. In this mode, if an access point is registered but not available, xpaaccess will pause for a period of time equal to the
       XPA_LONG_TIMEOUT, in order to give the server a chance to ready itself. By default, this timeout is 30 seconds. You can shorten the time of
       delay using the -t "short,long" switch. For example, to shorten the delay time to 2 seconds, use:

	 xpaaccess -c -t "2,2" ds9

       The first argument is the short delay value, and is ignored in this operation. The second is the long delay timeout.

       Note also that the default xpaaccess method (no -c switch) does not check access control (acls) but rather only checks whether the access
       point is both registered with the xpans name server and provides the specified type of access. In other words, the default xpaaccess could
       return 'yes' when you might not actually have access. This mode also always returns 'yes' for the xpans name server itself, regardless of
       whether the name server is active. The -c (contact) switch, which contacts the access point directly, can and does check the access con-
       trol (only for servers using version 2.1 and above) and also returns the real status of xpans.

SEE ALSO

       See xpa(7) for a list of XPA help pages

version 2.1.14							   June 7, 2012 						      xpaaccess(1)