#!/bin/bash
# blank.sh
# Rescue CD Backup & Restore Utility device blanking utility
# version 7.2.5
# Rod Wright 1/19/2024
# Refer to CHANGELOG file for details.
# -----------------------------------------------------------------------------

PROG_NAME="blank.sh"
PROG_VERSION=7.2.5
PROG_REVISION=1
RBRU_INSTALL_PATH="/root/rescuebru"

source $RBRU_INSTALL_PATH/functions.sh

# test for required arguments
if [ "$#" -ne 1 ]; then
    echo "blank.sh: Invalid number of arguments."
    echo "Usage: blank <target>"
    echo "target can be drive (/dev/sda) or partition"
    echo "(/dev/sda1)."
    echo "If target is a drive, all data including the MBR,"
    echo "partition table, and any RAID signatures will be lost."
    echo "If target is a partition, any filesystem on it will"
    echo "be lost."
    exit 1
fi

tgt_dev=$1
dd_bs=4096

# determine sizes of target
tgt_size=`blockdev --getsize64 $tgt_dev`
tgt_blocks=$(($tgt_size / $dd_bs ))

# now do the blanking
monitor "dd if=/dev/zero bs=$dd_bs count=$tgt_blocks conv=sync,noerror status=noxfer|pv -s $tgt_size|dd of=$tgt_dev bs=$dd_bs" "pausable"
exit $?