Split log file by date

splitLogFileByDate.sh

#!/bin/bash

function breakup()
{
	LAST=$(wc -l "$1" | xargs | cut -d' ' -f1)
	LAST=$(($LAST + 1))
	grep -no ^201.-..-.. "$1" | sort -u -t: -k2 | sort -t: -rnk1 | while read j
	do
		DATE=$(echo $j | cut -d: -f2)
		LINE=$(echo $j | cut -d: -f1)
		echo "$1-${DATE//-/}"
		sed -n $LINE,$(($LAST - 1))p "$1" > "$1-${DATE//-/}"
		LAST=$LINE
	done
}

for file
do
	breakup $file
done