xpachanges(7)

NAME

XPA Changes - Changes For Users from XPA 1.0 and 2.0

This document describes changes that will affect users who migrate from
XPA 1.0 to XPA 2.0.

There have been a few changes that affect users who upgrade XPA from
version 1.0 to version 2.0. These changes are detailed below.

o XPA commands no longer have a resolver routine (this is open to: negotiations, but we decided the idea was dumb). For the SAOtng
program, this means that you have explicitly specify the fits
access point, i.e.,:

cat foo.fits | xpaset SAOtng fits; instead of:

cat foo.fits | xpaset SAOtng; o By default, xpaset, xpaget, etc. now wait for the server callback
to complete; i.e., the old -W is implied (and the switch is
ignored). This allows support for better error handling. If you
want xpaset, etc. to return before the callback is complete, use
-n switch:

echo "file foo.fits" | xpaset -n SAOtng

o The old -w switch in xpaset and xpaget is no longer necessary (and

is ignored), since you can have more than one process communicating with an xpa access point at one time.

o The new -p switch on xpaset means you need not read from stdout:

xpaset -p SAOtng colormap I8

will send the paramlist to the SAOtng callback without reading from stdin.