#! /bin/bash
#
# Shell skript for replacing the bytes of a file by zeros.
# This is not a random application but derived from rmm and
# good for simple clearing e. g. for hiberfil.sys, pagefile.sys etc..
# 
# For using another random number device than /dev/random change 
# the if-option of dd below.
#
# For a version with progress meter use dd_rescure or ddrescure.
#
# TODO: Version which works with special signs like newline in the file
# name and which converts the file names with their absolute path
# because otherwise find can read them as options if they have the same name.
#
# rolf dot freitag at email.de 2000

for file in $@
do
  size=`find "$file" -printf "%s"` || continue
  # overrite all bytes of the file
  #dd if=/dev/zero of="$file" bs=1 count=$size
  echo "zeroing file $file: size $size"
  ddrescue -v --max-size=$size /dev/zero "$file"
  # set size to 0; see also "Unix Power Tools"
#  > "$file"
  # remove
#  rm -v "$file"
done  

exit 0