xpans.1   xpans.1 
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When an XPA access point is removed by a server using XPAFree(), the When an XPA access point is removed by a server using XPAFree(), the
access information is removed from the name server. If an XPA-enabl ed access information is removed from the name server. If an XPA-enabl ed
process is terminated, all names registered by that process will be process is terminated, all names registered by that process will be
removed automatically. The log file is always updated to reflect th e removed automatically. The log file is always updated to reflect th e
currently registered access points. currently registered access points.
The name server itself has an XPA access point names xpans registere d The name server itself has an XPA access point names xpans registere d
through which you can find out information about currently registere d through which you can find out information about currently registere d
access points (assuming you have access to the name server; see XPA access points (assuming you have access to the name server; see XPA
Access Control for more information). For example, to display all cu Access Control for more information). For each registered access
r‐ point, the following information is returned:
rently registered access points, simply execute:
class # class of the access point
name # name of the access point
access # allowed access (g=xpaget,s=xpaset,i=xpainfo)
id # socket access method (host:port for inet, file for
local/unix)
user # user name of access point owner
For example, to display all currently registered access points, simp
ly
execute:
xpaget xpans xpaget xpans
Continuing the example of ds9 above, this will return: Continuing the example of ds9 above, this will return:
ds9 ds9 gs 838e2f67:1863 eric DS9 ds9 gs 838e2f67:1863 eric
If the same program has been started with different XPA access names , If the same program has been started with different XPA access names ,
you can look up only names matching a specified template. For exampl e, you can look up only names matching a specified template. For exampl e,
assume that ds9 has been started up using: assume that ds9 has been started up using:
ds9 & ds9 &
ds9 -title ds9-1-eric & ds9 -title ds9-1-eric &
ds9 -title ds9-2-eric & ds9 -title ds9-2-eric &
To lookup all ds9 access points which end in ".eric" and which can b e To lookup all ds9 access points which end in ".eric" and which can b e
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Note that this proxy interface to xpans is experimental. It is used to Note that this proxy interface to xpans is experimental. It is used to
provide remote data analysis capabilities on the Chandra-Ed system provide remote data analysis capabilities on the Chandra-Ed system
using ds9. (See http://chandra-ed.cfa.harvard.edu and using ds9. (See http://chandra-ed.cfa.harvard.edu and
http://hea-www.harvard.edu/saord/ds9 for more details). As always, http://hea-www.harvard.edu/saord/ds9 for more details). As always,
please contact us if you have problems or questions. please contact us if you have problems or questions.
SEE ALSO SEE ALSO
See xpa(n) for a list of XPA help pages See xpa(n) for a list of XPA help pages
version 2.1.8 November 1, 2007 xpans (1) version 2.1.10 September 1, 2009 xpans (1)
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