Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!sun-barr!apple!motcsd!hpda!hpcuhb!hp-ses!wunder
From: wunder@hp-ses.SDE.HP.COM (Walter Underwood)
Newsgroups: comp.sys.hp
Subject: Re: Experience sought with large HP 9000 clusters
Message-ID: <920030@hp-ses.SDE.HP.COM>
Date: 23 Jun 89 21:12:28 GMT
References: <3517@cps3xx.UUCP>
Organization: HP SW Engineering Systems - Palo Alto, CA
Lines: 119


   wunder sez:
   It is fairly easy to put spooled devices on cnodes.

And here is the script we use.  We let the usual model script write to
the FIFO.  The FIFOs live in /usr/spool/lp/devices.

wunder

# This is a shell archive.  Remove anything before this line,
# then unpack it by saving it in a file and typing "sh file".
#
# Wrapped by Walter Underwood <wunder@hp-ses> on Fri Jun 23 14:06:30 1989
#
# This archive contains:
#	shuttle	
#

unset LANG

echo x - shuttle
cat >shuttle <<'@EOF'
#! /bin/ksh
################################################################################
#
# File:         shuttle.sh
# RCS:          $Header: shuttle.sh,v 1.1 88/04/18 17:01:48 tw Exp $
# Description:  Allow printers on cnodes other than the one with lpsched
# Author:       Tw Cook, HP Software Development Environments
# Created:      Mon Apr 18 15:43:53 1988
# Modified:     Tue May  3 09:21:59 1988 (Scott Kaplan) scott@hpsdel
# Language:     ksh
# Package:      N/A
# Status:       Experimental (Do Not Distribute)
#
# (c) Copyright 1988, Hewlett-Packard Company, all rights reserved.
#
################################################################################
#  Usage:  shuttle fifo device
# 
#  "fifo" is the name of a fifo which must be visible (i.e. not hidden inside
#  a CDF directory like /dev) to both the machine running lpsched and the
#  machine with the printer.   The fifo will be created if it isn't already
#  present.   This script will block until a file appears in the fifo; then
#  it will cat the file onto the printer, then it will block again.  On the
#  system running lpsched, simply install the printer as normal with the
#  fifo name as the device name.   On the machine with the printer, run
#  this script always (perhaps with a "respawn" from init).   Set the baud
#  rate below if different from 19200.
################################################################################

baudRate=9600

if [ "${1}" = "-b" ]
then
    baudRate=${2}
    shift ; shift
fi

if [ $# -ne 2 ]
then
    print Usage: ${0} fifo-name printer-name
fi

myName=${0}
fifoName=${1}
printerName=${2}

{
    if tty -s <&1
    then
       thisIsTty=1
    else
       thisIsTty=0
    fi

    function ttySet {
	if (( $thisIstty ))
	then
	    stty ignpar ixon cs8 ${baudRate} -opost <&1 2>/dev/null
	fi
    }

    function abortMsg {
	print "${myName}: printer fifo daemon on `hostname` killed.\n"
	date
	print "\f"
	ttySet
	exit 1
    }

    ttySet

    trap abortMsg 1 2 3 15

    if [ ! -d "`dirname ${fifoName}`" ]
    then
	mkdir `dirname ${fifoName}` || \
		{ print "Cannot make parent directory for fifo, ${fifoName}"; exit 2; }
    fi

    if [ ! -p ${fifoName} ]
    then
	rm -f ${fifoName}
	mknod ${fifoName} p
    #   chmod 600 ${fifoName}	# permission, ownership?
    fi

    while (( 1 ))
    do
	cat ${fifoName}
	ttySet			# does this really force output flush?
    done
} > ${printerName}
@EOF

chmod 755 shuttle

exit 0