BASH SKELETON: Read from file from the last place you left off

gistfile1.txt

## incomplete; just a guide so I can remember

$log_file
last_length = `cat /tmp/${log_file}_last_length`
current_legnth = 'wc -c $log_file'

if [[ $last_file_length > 0 ]] ; then
	diff_length = current_length - last_length
	if [[ diff_length >= 0 ]] ; then

		## DO WHAT EVER AROUND HERE - should only tail file from where it last read
		tail -c +$last_length+1 $log_file


	fi
fi
echo $current_legth > /tmp/${log_file}_last_length