[xslt] Catch xslt stdout errors

[Esther Parrilla Endrino <esther parrilla deimos-space com>]

Hi,

I would like to know if there is a way to catch the XSLT error that I
get from the standard output when an error in a transformation occurs,
and write it to a log file.
Resuming, the lines I am using to transform are:

--snip--
cur = xsltParseStylesheetFile((const xmlChar *)xslFile_name);
doc = xmlParseFile(xmlFile_name);
res = xsltApplyStylesheet(cur, doc, params)
xmlSaveFile(formattedFile_name, res);
xsltFreeStylesheet(cur);
xmlFreeDoc(res);
xmlFreeDoc(doc);
xsltCleanupGlobals();
xmlCleanupParser();
--snip--

For example if I can't load the XSL, I get in stdout the following
error:

--snip--
warning: failed to load external entity "./filess/template.xsl"
error
xsltParseStylesheetFile : cannot parse ./filess/template.xsl
--snip--

How can I write this message to a log file and avoid it to appear in
stdout?
I have taken a look at the libxslt API but it is not clear to me which
function should I use to do so...

Thanks,

esther


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