#!/bin/sh

PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/bin
export PATH

# configuration
dir=/var/local/security
sum=sha1sum
oldlist=oldlist.$$
newlist=newlist.$$

if [ $# -lt 1 ]
then
	echo "usage: $0 old_date [new_date]"
	exit 1
fi

cd $dir

if [ -f "fp.$1" -o -f "fp.$1.gz" ]
then
	echo "$sum of fp.$1 (before compression):"
	gzip -cdfq "fp.$1" | $sum
	echo
	echo "Files that have changed contents since footprint run of $1:"
	gzip -cdfq "fp.$1" | ($sum -c - 2>&1) | grep -v ': OK$'
fi

if [ -f "fl.$1" -o -f "fl.$1.gz" ]
then
	echo
	echo "$sum of fl.$1 (before compression):"
	gzip -cdfq "fl.$1" | $sum
	echo

	# comparefiles is set to 1 if we are comparing two existing filelists
	# rather than comparing an old filelist with the current filesystem
	comparefiles=0

	if [ -n "$2" -a \( -f "fl.$2" -o -f "fl.$2.gz" \) ]
	then
		comparefiles=1
       		echo "$sum of fl.$2 (before compression):"
       		gzip -cdfq "fl.$2" | $sum
		echo
	fi

	# get list of filenames from first filelist file
	gzip -cdfq "fl.$1" | sort +17 >$oldlist

	if [ $comparefiles = 1 ] 
	then
		# extract filenames from second filelist file
		gzip -cdfq "fl.$2"
	else
		# run filelist for current list
		filelist
	fi | sort +17 >$newlist

	if [ $comparefiles = 1 ]
	then
		echo "Filesystem differences between $1 ('<') and $2 ('>'):"
	else
		echo "Filesystem differences between $1 ('<') and now ('>'):"
	fi
	echo "     inum  blocks ln mode user     group         bytes ctime                    mtime                    name (-> symlink)"
	echo "  ------- ------- -- ---- -------- -------- ---------- ------------------------ ------------------------ -----------------"
	diff $oldlist $newlist | grep '^[<>]'
	rm $oldlist $newlist
fi