From owner-freebsd-questions  Tue May 27 05:06:26 1997
Return-Path: <owner-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id FAA10198
          for questions-outgoing; Tue, 27 May 1997 05:06:26 -0700 (PDT)
Received: from mail.EUnet.hu (www.eunet.hu [193.225.28.100])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id FAA10188
          for <freebsd-questions@freebsd.org>; Tue, 27 May 1997 05:06:23 -0700 (PDT)
Received: by mail.EUnet.hu, id OAA18646; Tue, 27 May 1997 14:06:04 +0200
Received: (from zgabor@localhost) by CoDe.hu (8.7.5/8.7.3) id MAA00626; Tue, 27 May 1997 12:19:33 +0200 (MET DST)
From: Zahemszky Gabor <zgabor@CoDe.hu>
Message-Id: <199705271019.MAA00626@CoDe.hu>
Subject: Re: print filter
To: freebsd-questions@freebsd.org (FreeBSD questions)
Date: Tue, 27 May 1997 12:19:32 +0200 (MET DST)
Cc: un_x@anchorage.net
In-Reply-To: <Pine.BSF.3.95q.970522174854.852A-100000@aak.anchorage.net> from Steve Howe at "May 22, 97 05:52:05 pm"
X-Mailer: ELM [version 2.4ME+ PL11 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-questions@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

> 
> this is an "auto" bsd/dos lp filter i whipped up ...
> can anyone tell me why it prints a blank line at the
> beginning of each document (not page, document ...)?

Well, I tried it but I don't know.  Maybe your laziness about "-s, or some
bug in sh, I don't know.  Instead of if [ .. ] , try eliminating the test,
and the backtick.

if echo "$line1" | grep -q '^M' ; then ...

(Well, in 2.1.5, the -q option of grep isn't documented in the synopsis of
the grep manual, only in the long description).  Of course, this version is
cheaper with two forks/one exec (with one/zero, if [ is a builtin command in
sh), and some builtin redirection because of the `.
So I don't know, if it works, but if not, you tuned your machine's
performance, at least.  ;-)


> -------------------------------------------------------------------------
> #!/bin/sh
> #
> # simple lp text filter (BSD/DOS)
> 
> read line1
> 
> if   [ `echo $line1|grep ^M` ]; then
>         echo $line1 && cat                  && echo ^L && exit 0
> else  { echo $line1 && cat; } | sed s/$/^M/ && echo ^L && exit 0
> fi
> exit 2

Gabor
-- 
#!/bin/ksh
Z='21N16I25C25E30, 40M30E33E25T15U!' ;IFS=' ABCDEFGHIJKLMNOPQRSTUVWXYZ ';set $Z;for i { [[ $i = ? ]]&&print $i&&break;[[ $i = ??? ]]&&j=$i&&i=${i%?};typeset -i40 i=8#$i;print -n ${i#???};[[ "$j" = ??? ]]&&print -n "${j#??} "&&j=;typeset +i i;};IFS=' 0123456789 ';set $Z;X=;for i { [[ $i = , ]]&&i=2;[[ $i = ?? ]]||typeset -l i;X="$X $i";typeset +l i;};print "$X"