From: Steven Tepper <greep at su-dsn>
ccat (like cat but for compacted files) doesn't handle standard input on
4.1BSD, although the man page shows it does. Since it if a c-shell
script, the fix is trivial:
#
if ($#argv == 0) then
/usr/ucb/uncompact
else
(original version of ccat shell file)
endif