#!/bin/sh
# @(#) $Id: bihourly.sh,v 1.2 2006/07/28 18:19:32 leres Exp $ (LBL)
#
#  This is a script suitable as a cron job, which fetches the arp tables
#  from a cisco using snmpwalk.
#
#  You need to create a list (HOSTLIST), that contains the names of
#  the hosts to query and a file (CNAME), which contains the read/only
#  snmp community name.
#
HOSTLIST=/var/arpwatch/hostlist
CNAME=/var/arpwatch/cname
ARPDIR=/var/arpwatch

# no further changes
PATH=@CLIENT_BASEDIR@/sbin:$PATH
export PATH

cd $ARPDIR
#
list="`cat $HOSTLIST`"
cname="`cat $CNAME`"
temp1=/tmp/bihourly.1.$$
temp2=/tmp/bihourly.2.$$
d=/tmp/errs

# imperfect hack
l=/tmp/bihourly.lock
if [ -f ${l} ]; then
	echo "skipping arpwatch bihourly job, lock file exists"
	exit
fi

trap 'rm -f ${l}; exit 1' 1 2 3 15
touch ${l}

alist=""
for r in ${list}; do \
	arpfetch ${r} ${cname} > ${r} 2> ${temp1}
	if [ -s ${temp1} ]; then
		echo "arpfetch ${r} errors:"
		xr=${d}/${r}.$$
		echo "(file ${r} saved in ${xr})"
		mkdir -p ${d}
		cp ${r} ${xr}
		sed -e 's/^/    /' ${temp1}
		continue
	fi
	alist="${alist} ${r}"
done

arpsnmp -d ${alist} > ${temp1} 2>&1

sed -e '/arpsnmp: suppressed DECnet flip flop/d' ${temp1} > ${temp2}
if [ -s ${temp2} ]; then
	mail -s "`hostname` arpwatch report" \
	    arpwatch-reports@noname.lbl.gov < ${temp2}
fi
rm -f ${temp1} ${temp2}

d=/www/NETINFO/arpwatch

f=arp.dat
cp ${f} ${d}

f=ethercodes.dat
diff ethercodes.dat ${d} >>/dev/null 2>&1
if [ $? -ne 0 ]; then
	echo Updating ${d}/${f}
	cp ${f} ${d}
fi

rm ${l}

exit