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
DESCRIPTION
xpaaccess returns "yes" if there are existing XPA access points that
match the template (and optional access type: g,i,s), and returns "no"
otherwise. If -n is specified, the number of matches is returned
instead. If -v is specified, each access point is displayed instead.
- 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 control (only for servers using version 2.1 and above) and also returns the
real status of xpans.
SEE ALSO
- See xpa(n) for a list of XPA help pages