Failing newsfeeds piped to programs

[Christopher P. Lindsey]

My apologies if this is a duplicate for anyone.  I mailed it a couple of
days ago and the system logs show that it was accepted by rc.isc.org, but
I haven't seen it show up yet.

I'm trying to re-implement filter that extracts URLs out of newsgroup
articles.  I had a working newsfeeds entry in 1998 [1], but now that
I'm trying it again I don't have any luck.

Doing

   newsclip:*:Tp:/usr/bin/procmail -m /usr/services/news/etc/procmailrc.news

doesn't pass anything to procmail; the recipes just get empty, zero-length
messages.  Similarly, trying other things like

   newsclip:*:Tp:/bin/cat - > /tmp/output
   newsclip:*:Tp:/usr/local/bin/archive

just creates zero-length files.

I'm running inn 2.3.4.  Has anything changed in recent versions that
would stop this from working?  What am I missing?

Thanks,

Chris

[1] http://www.mhonarc.org/archive/html/mhonarc-users/1998-09/msg00093.html