pfSense

#!/bin/sh

# Usage

if [ $# -ne 1 ]; then

	echo "Usage : $0 iface" 

	exit

fi

# files paths

pid_file=/var/run/iftop_$1.pid

cache_file=/var/db/iftop_$1.log

awk_script=/root/iftop_parse.awk

# Binaries paths

DATE=/bin/date

STAT=/usr/bin/stat

CUT=/usr/bin/cut

PS=/bin/ps

GREP=/usr/bin/grep 

CAT=/bin/cat

RM=/bin/rm

IFTOP=/usr/local/sbin/iftop

AWK=/usr/bin/awk

# test if pid file exist

if [ -f $pid_file ]; then

	# check how old is the file

	curTS=`$DATE +%s` 

	pidTS=`$STAT -r $pid_file | $CUT -d " " -f 10`

 	# if more than 10 seconds, 

	# it must be a dead pid file (process killed?)

	# or a stucked process that we should kill

	if [ $(( curTS - pidTS )) -gt 10 ]; then

		oldPID=`$CAT $pid_file`

		# test if pid still exist

		run=`$PS -p $oldPID | $GREP -F '$0'` 

		if [ "$run" != "" ]; then

			kill -9 $oldPID	

		fi 

		$RM $pid_file

		$RM $cache_file

		exit

	fi

	if [ -f $cache_file ]; then

		$CAT $cache_file

	fi

	exit 	

fi

echo -n $$ > $pid_file

$IFTOP -nNb -i $1 -s 1 -o 2s -t 2>> /dev/null | $AWK -f $awk_script > $cache_file.1

$CAT $cache_file.1 > $cache_file

$CAT $cache_file

$RM $pid_file