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| author | William Joye <wjoye@cfa.harvard.edu> | 2016-10-17 15:27:21 (GMT) |
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| committer | William Joye <wjoye@cfa.harvard.edu> | 2016-10-17 15:27:21 (GMT) |
| commit | d604b7940b14efb191a38ef22c3a38fa3adba4d0 (patch) | |
| tree | 1e99fa53dd7d1e2ec7987ea6a0fa79133f2637b8 /doc/changes.html | |
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Squashed 'xpa/' content from commit 5769d31
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diff --git a/doc/changes.html b/doc/changes.html new file mode 100644 index 0000000..8488985 --- /dev/null +++ b/doc/changes.html @@ -0,0 +1,69 @@ +<!-- =defdoc xpachanges xpachanges 1 --> +<HTML> +<HEAD> +<TITLE>Changes For Users from XPA 1.0 and 2.0</TITLE> +</HEAD> +<BODY> + +<!-- =section xpachanges NAME --> +<H2><A NAME="xpachanges">XPA Changes: Changes For Users from XPA 1.0 and 2.0</A></H2> + +<!-- =section xpachanges SYNOPSIS --> +<H2>Summary</H2> +<P> +This document describes changes that will affect users who migrate +from XPA 1.0 to XPA 2.0. + +<!-- =section xpachanges DESCRIPTION --> +<H2>Description</H2> +<P> +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. +<UL> +<P> +<LI>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 must explicitly specify the access +point, i.e.,: +<PRE> + cat foo.fits | xpaset SAOtng fits +</PRE> + +<P> +instead of: +<PRE> + cat foo.fits | xpaset SAOtng +</PRE> +<P> +<LI>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: +<PRE> + echo "file foo.fits" | xpaset -n SAOtng +</PRE> +<P> +<LI>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. + +<P> +<LI>The new -p switch on xpaset means you need not read from stdout: +<PRE> + xpaset -p SAOtng colormap I8 +</PRE> +<P> +will send the paramlist to the SAOtng callback without reading from stdin. + +</UL> + +<!-- =section xpachanges SEE ALSO --> +<!-- =text See xpa(n) for a list of XPA help pages --> +<!-- =stop --> + +<P> +<A HREF="./help.html">Go to XPA Help Index</A> + +<H5>Last updated: September 10, 2003</H5> +</BODY> +</HTML> |