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Viewing file:     unix-lpr.sh (3.99 KB)      -rwxr-xr-x

#!/bin/sh
# $Id: unix-lpr.sh,v 1.4 2002/04/22 19:53:23 giles Exp $
#
# Unix lpr filter. The default setup sends output directly to a pipe,
# which requires the Ghostscript process to fork, and thus may cause 
# small systems to run out of memory/swap space. An alternative strategy,
# based on a suggestion by Andy Fyfe (andy@cs.caltech.edu), uses a named
# pipe for output, which avoids the fork and can thus save a lot of memory.
#
# Unfortunately this approach can cause problems when a print job is aborted, 
# as the abort can cause one of the processes to die, leaving the process 
# at the other end of the pipe hanging forever.
#
# Because of this, the named pipe method has not been made the default,
# but it may be restored by commenting out the lines referring to
# 'gsoutput' and uncommenting the lines referring to 'gspipe'.
#

PBMPLUSPATH=/usr/local/bin
PSFILTERPATH=/usr/local/lib/ghostscript
LOCALPATH=/usr/local/bin
X11HOME=/usr/X11R6

PATH=/bin:/usr/bin:/usr/ucb:/usr/etc
PATH=${PATH}\:${LOCALPATH}\:${PBMPLUSPATH}\:${PSFILTERPATH}
LD_LIBRARY_PATH=${X11HOME}/lib

export PATH LD_LIBRARY_PATH acctfile host user

user= host= acctfile=/dev/null

#
# Redirect stdout to stderr (for the logfile) and open a new channel
# connected to stdout for the raw data. This enables us to keep the
# raw data separate from programmed postscript output and error messages.
#
exec 3>&1 1>&2

#
# Get username and hostname from filter parameters
#
while [ $# != 0 ]
do  case "$1" in
  -n)	user=$2 ; shift ;;
  -h)	host=$2 ; shift ;;
  -*)	;;
  *)	acctfile=$1 ;;
  esac
  shift
done

#
# Get the filter, printer device and queue type (direct/indirect)
#
filter=`basename $0`
device=`dirname $0`
type=`dirname ${device}`
device=`basename ${device}`
fdevname=$device
type=`basename ${type}`

#
# Find the bpp and number of colors, if specified
#

colorspec="`echo ${device} 
bool(false)