#!/bin/bash

# This kick-ass shell script can find anything from a mess
# Then display how long it takes to do it.

# ------------------------------ Some foreplay...
SECONDS=0
FINDSTR="${@:1}"

# Filter out non-hex strings.....
if ! [[ $FINDSTR =~ ^[0-9a-fA-F]+$ ]]; then
        echo "Try to find non-hex?"
        exit 1;
fi

# Make you lower(-case) and create gaps between them :)
FINDSTR=" $(echo $FINDSTR | tr '[:upper:]' '[:lower:]' | sed 's/.\{4\}/& /g')"

# Too long isn't quite confortable, right?
if [ ${#FINDSTR} -ge 32 ]; then
        echo "Is it a bit... longer??" ;
        exit 2;
fi

# ------------------------------- Now let's do it
cat /dev/urandom | hexdump | grep --color=always -m1 "$FINDSTR"

# ------------------------------- Done
duration=$SECONDS
echo "$(($duration / 60)) minutes and $(($duration % 60)) seconds elapsed."