#! /bin/bash
# Random domain names generator
# Karol Bonenberg 

#
# Configuration
#

LENGTH=4
DOMAINS=200
TOP_LEVEL=".com"
PREFIX="www."

#
# Generates a single pseudo-random ASCII character 
#

gen_char() {

	# Read and format pseudo-random integer from urandom device
	raw=$(dd if=/dev/urandom count=1 2> /dev/null | cksum | cut -f1 -d" ")

	# Scale the number to ASCII alphabet range
	random=$(expr $raw % 26)
	random=$(expr $random + 97)
	
	# Covert it from decimal to octal and return value
	random=`echo "obase=8; $random" | bc`
	return $random
}

#
# Generates a single URL
#

gen_name() {

	name=""
	for ((i=1; i <= LENGTH; i++))
	do
		gen_char
		# Add returned value to string variable, add slash for ASCII conversion
		name="$name\\$?"
	done
	# Print protocol name, escaped characters and top level domain
	echo -e $PREFIX$name$TOP_LEVEL
}


for ((j=1; j <= DOMAINS; j++))
do
	gen_name
done