Interruptible script generating pre-defined number of random files

generate.sh

#!/bin/bash

TARGET_FILE_NUM=10000
CURRENT_FILE_NUM=`ls -l | wc -l`
FILES_TO_GENERATE=$((TARGET_FILE_NUM - CURRENT_FILE_NUM))
MAX_FILE_SIZE=8192
FILE_NAME_PREFIX="test_"

if [[ $FILES_TO_GENERATE -lt 0 ]]; then
	echo "We already have $CURRENT_FILE_NUM files, no need to generate more"
	exit
fi

echo "Generating $FILES_TO_GENERATE more files in order to acheive the goal of $TARGET_FILE_NUM"

for i in $(seq $CURRENT_FILE_NUM $TARGET_FILE_NUM);
do
	printf "."
	if [ $((i % 100)) -eq 0 ]; then
		printf $i
	fi
	uuid=`uuidgen`
	newname="${test}${uuid}"
	size=$(( (RANDOM % MAX_FILE_SIZE) + 1 ))
	head -c $size  </dev/urandom > $newname
done