Date: Fri, 13 Sep 2002 19:10:35 -0400 From: Garance A Drosihn <drosih@rpi.edu> To: Warren Block <wblock@wonkity.com>, Roman Neuhauser <neuhauser@bellavista.cz> Cc: FreeBSD-Questions@FreeBSD.ORG Subject: Re: lpr Job Name Message-ID: <p05111704b9a813517d8c@[128.113.24.47]> In-Reply-To: <Pine.BSF.4.21.0209130649450.49045-100000@wonkity.com> References: <Pine.BSF.4.21.0209130649450.49045-100000@wonkity.com>
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At 6:57 AM -0600 9/13/02, Warren Block wrote:
>On Fri, 13 Sep 2002, Roman Neuhauser wrote:
> > actually, that snippet is a UUCA nominee because the cat there
> > is completely useless. someprog > /tmp/$USER/NameIWant would
> > work just as well.
>
>Actually, it isn't. It took me a bit to see what Garance was talking
>about. ">" isn't a command; you can't start a script with it, so you
>need the cat to provide something to redirect:
>
> #!/bin/sh
> # redirect stdin to a named file
> cat > /tmp/$USER/NameIWant
> # print and remove named file with lpr
> lpr -r -Pblah /tmp/$USER/NameIWant
>
>Output can then just be piped to it.
Exactly. Thanks.
It would have been much less confusing if I had written it out as
a script, instead of writing a few lines of code "which could be
turned into a script". But I was pretty tired at the time, and I
did not trust my ability to write a fully-wonderful script.
Obviously it is much better to just fix lpr, but now that I'm much
more awake I'll write something closer to a real working script:
- - - - - - - - [start]
#!/bin/sh
# Example of a script which would implement 'lpr -Nsomename'
# This is only an academic exercise, as it would be much better to
# fix lpr itself to recognize -N (or something similar).
#
# NOTE: This has not actually been tested!
# It is only an example!
# ** USE AT YOUR OWN RISK! **
#
# Garance/Sep 13/2002
NAME=
COPT=
JOPT=
PTR=
STDOPT=
HAVEFILES=
OPTERR=
while test $# != 0
do case "$1" in
-N*) NAME="`echo $1 | sed 's;^-N;;'`" ;;
-C*) COPT="$1" ;;
-J*) JOPT="$1" ;;
-h|-m|-l) STDOPT="$STDOPT $1" ;;
-P) PTR="-P$2" ; shift ;;
-P*) PTR="$1" ;;
-*) echo "Bad parameter to $PGM: $1" 1>&2
OPTERR=yes;;
*) HAVEFILES=yes ; break ;;
esac
shift
done
if [ "$OPTERR" ] ; then
exit 4
fi
TDIR=/tmp/lpr-$USER-$$
if [ ! -d $TDIR ] ; then mkdir $TDIR ; chmod 700 $TDIR ; fi
if [ -z "$NAME" ] ; then
# No need to bother with temporary files
lpr $PTR $STDOPT "$COPT" "$JOPT" "$@"
exit $?
fi
if [ -z "$HAVEFILES" ] ; then
# Read from stdin, write to temp file, then lpr the temp file.
if [ -f "$TDIR/$NAME" ] ; then rm -Rf "$TDIR/$NAME" ; fi
cat > "$TDIR/$NAME"
lpr -r $PTR $STDOPT "$COPT" "$JOPT" "$NAME"
exit $?
else
# Have to create a loop here, and process the file(s) one-at-a-time,
# either adding a number to each $NAME, or doing a separate 'lpr'
# for each file (in case the user specified multiple files).
:
fi
- - - - - - - - [end]
The above is made up of bits and pieces of other scripts that I have
written. While I do not bet it will work, I do bet that it is much
better than anything I would have come up with last night!
--
Garance Alistair Drosehn = gad@gilead.netel.rpi.edu
Senior Systems Programmer or gad@freebsd.org
Rensselaer Polytechnic Institute or drosih@rpi.edu
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