#!/bin/ksh

backupdir=/data/backup
server=FTP-SERVER
user=auto
pass=""

[[ ! -x `whence lftp` ]] && print lftp executable missing && exit 1

fmain() {
	print checking for previous backup processes... \\c
	tmp=`pgrep lftp`
	[[ -n $tmp ]] && print ANOTHER LFTP PROCESS IS STILL RUNNING && print "$tmp" && exit 1
	print done

	print calculating needed space... \\c
	needed=`du -s $backupdir/ | awk '{print $1}'`
	print $needed

	#100GB storage in kbytes
	#echo $((1024*1024*100))
	avail=104857600
	print available space is $avail

	(($avail <= $needed)) && print NO SPACE LEFT ON REMOTE SITE && exit 1

	print uploading $backupdir/\*\* to $user@$server...
	lftp -u $user,$pass $server <<EOF99 && print done
lcd $backupdir/
mirror -R -c --delete-first --parallel=2
ls
bye
EOF99
}

date
fmain $@
date

#date=`date +%Y-%m-%d-`
#lftp: rm -rf /
#lftp: mput -c ${date}*