#!/bin/ksh

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin
#:/usr/pkg/bin

#breaks w/ tmp=`pgrep lftp`
#set -e

function uploadftp {
        echo -n checking for previous backup processes...
        tmp=`pgrep lftp`
        [[ -n $tmp ]] && echo ANOTHER LFTP PROCESS IS STILL RUNNING && echo "$tmp" && exit 1
	unset tmp
        echo done

	echo -n calculating needed space...
	needed=`du -s $uploaddir/ | awk '{print $1}'` && echo done
	echo needed space is $needed bytes -- $(( needed / 1024 / 1024 ))G

	#100GB storage in kbytes
	#echo $((1024*1024*100))
	avail=104857600
	echo available space is $avail bytes -- $(( avail / 1024 / 1024 ))G

        (( avail < needed )) && echo NO SPACE LEFT ON REMOTE SITE && exit 1

        echo uploading $uploaddir/\*\* to $user@$server
        lftp -u $user,$pass $server <<EOF && echo upload done
lcd $uploaddir/
mirror -R -c --delete-first
bye
EOF
	# not sure it improves bandwidth usage but it makes harder to watch when interactive
	# hence we disable it
	# --parallel=2
}

function uploadsync {
        echo -n checking for previous backup processes...
        tmp=`pgrep rsync`
        [[ -n $tmp ]] && echo ANOTHER RSYNC PROCESS IS STILL RUNNING && echo "$tmp" && exit 1
        unset tmp
        echo done

        echo synching $uploaddir/\*\* to $rsyncdest
        #we have dedicated source and destination folders hence we can
        #add a trailing-slash at the source
        rsync -avz --delete-after $uploaddir/ $rsyncdest/
        #rsync -rltvz --checksum --delete
}

[[ ! -f /root/backup.conf ]] && echo setup /root/backup.conf first && exit 1
. /root/backup.conf

[[ -z $uploaddir ]] && echo define \$uploaddir first && exit 1
[[ -z $maxold ]] && echo define \$maxold first && exit 1

[[ ! -d $uploaddir/ ]] && echo uploaddir $uploaddir/ does not exist && exit 1

[[ $method = ftp && ! -x `which lftp` ]] && echo lftp executable missing && exit 1
[[ $method = rsync && ! -x `which rsync` ]] && echo rsync executable missing && exit 1

echo upload directory is $uploaddir/ with method $method
[[ $method = ftp ]] && uploadftp
[[ $method = rsync ]] && uploadsync