#!/bin/sh

# some config
dirout=/var/ftp/backup
logfile=/var/log/mkbackup.log
# num of days ago to keep files, any oldest which present in FILE will be removed!
# for ex: if keepdays is set to '2', then today and yesterday files will be kept.
keepdays=9

if [ $# -lt 1 ]; then
	echo "Usage: ${0##*/} FILES..."
	echo "    where each FILE contains list of absolute pathed dirs"
	echo "    that should be backed up; it is passed to '-T' tar option"
	exit 0
fi

curdate=`date +%Y%m%d`
curdate_full=`date "+%Y-%m-%d %H:%M:%S"`

echo "############## $curdate_full Starting mkbackup... ##############" | tee -a $logfile
echo "####    dirout:  $dirout"
echo "####    logfile: $logfile"
echo

args=$*

# backup part
while [ -n "$1" ]; do
	#if [ "${dir:0:1}" == "#" ]; then
	#	continue
	#fi

	lst=$1
	if [ ! -f "$lst" ]; then
		shift
		continue
	fi

	# make mrproper :)
	fname=${lst##*/}
	fname=${fname%*.lst}
	fname=${fname//./_}

	# create new tars, then bz2'em
	fname=$dirout/$fname.$curdate.tar
	fnamebz2=$fname.bz2

	# ignore tar exit code 1 'some files differ' not to leave non-compressed
	# file alone. we assume that 0 and 1 code means success here
	tar -csp -T $lst >$fname 2>>$logfile
	if [ $? -eq 0 ] || [ $? -eq 1 ]; then
		bzip2 -9z $fname 2>>$logfile && \
		bzip2 -t $fnamebz2 2>>$logfile
	fi

	[ $? -eq 0 ] && echo "created: $fnamebz2" || echo "ERROR: while processing $fnamebz2"

	shift
done

# cleanup part
for lst in $args; do
	[ ! -f "$lst" ] && continue

	# make mrproper :)
	fname=${lst##*/}
	fname=${fname%*.lst}
	fname=${fname//./_}

	# remove old backups
	for f in $(find $dirout -name "$fname.*.tar.bz2" -daystart -mtime +$[$keepdays-1]); do
		rm "$f" && echo "removed: $f"
	done
done