#!/bin/sh
# should shred already deleted files on most filesystems without too
# much trouble. this gets around the traditional limitations of shred
# for files you want to delete on more modern/exoctic filesystems.
# havent tried this on zfs or the like, but should even work there.

# thanks to the z option passed to shred will also make that volume
# compress well.

# its harsh on magnetic storage (like hard disks) so you probably dont
# want to do this too often on your laptop.

# some filesysytems (like ext2) reserve some space for root. if you 
# want to be extra paranoid, run this as root to make sure you wipe 
# that too. also see http://dban.sf.net

if [ -d $1 ];then
	cd $1
fi
dd if=/dev/zero of=.shredme 
case `uname` in
    *BSD)
        rm -P .shredme
        ;;
    Darwin)
        srm .shredme
        ;;
	*)
	if which shred;then
		shred -vz .shredme
		rm .shredme
	else
		echo you need the shred command to run this.
		echo deleting the shred file...
		rm .shredme
	fi
esac