From mboxrd@z Thu Jan  1 00:00:00 1970
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Fax problem
From: Richard Miller <miller@hamnavoe.demon.co.uk>
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Date: Fri,  1 Jun 2001 14:09:27 +0100
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There's a cute bug in /bin/fax, where it checks the input file type
to see if postscript or text files need converting to g3 fax format:

# convert to g3
switch(`{file $infiles(1)}){
case *g3* *fax*
	g3files=$infiles
case postscript
	gs -dSAFER '-sDEVICE=dfaxlow' ...
	g3files=($tmp.*)
case *
	lp -dstdout $infiles > $tmpps
	gs -dSAFER '-sDEVICE=dfaxlow' ...
	g3files=($tmp.*)
}

Because file(1) echoes the filename, the first case will be selected
erroneously for a text or postscript file whose name contains 'fax' -
and in particular when faxing from standard input, because stdin gets
copied to a temp file called /tmp/fax.in.$pid .

Simple correction: change the switch command to

switch(`{file <$infiles(1)}){

-- Richard Miller