safedd is a wrapper script for dd which cares forbidden 'of' targets listed in /etc/safeadd.conf .

safedd

#!/bin/sh
if [ ! -e /etc/safedd.conf ]; then
  echo /etc/safedd.conf is not found.
  echo Each line should be regex for forbidden '"'of'"' parameter.
  echo Example of /etc/safedd.conf :
  echo '    .*dev/sda.*'
  echo '    .*dev/md[0-9].*'
  exit -1
fi

ddbin=dd
if [ -e /opt/bin/coreutils-dd ]; then
  ddbin=/opt/bin/coreutils-dd
fi

cat /etc/safedd.conf | while read l
do
  
  if [ ${#l} = 0 ]; then
    continue
  fi

  for x in $@; do
    if expr $x : "of=${l}" > /dev/null; then
      echo $x is not allowed.
      exit 111
    fi
  done

done

if [ $? -eq 111 ]; then
  exit -1
fi

if [ $? -ne 0 ]; then
  exit -1
fi


echo ready to exec '"'"$ddbin $@"'"'
echo Type '"'yes'"' to continue.
read l
if [ "$l" == "yes" ]; then
  $ddbin $@ & pid=$!
  trap 'kill $pid; echo killed by signal 1,2,3 or 15; exit 1' 1 2 3 15
  while true; do
    sleep 10;
    kill -USR1 $pid
    if [ $? -eq 1 ]; then
      echo $ddbin had been terminated.
      break;
    fi
  done
else
  echo Nothing has occurred.
fi