119 lines
2.9 KiB
Bash
Executable File
119 lines
2.9 KiB
Bash
Executable File
#! /bin/bash
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#
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# Copyright (c) 2013-2017 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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usage ()
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{
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echo "Usage: `basename $0` [-h|--force]"
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echo "Erases the master boot record on the hard drive."
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echo "WARNING: All data on this hard drive will be lost."
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echo ""
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echo "Options:"
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echo " -h display this help"
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echo " --force do not ask for confirmation"
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exit 1
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}
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OPTS=`getopt -o h -l force -- "$@"`
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if [ $? != 0 ]
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then
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exit 1
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fi
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eval set -- "$OPTS"
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while true ; do
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case "$1" in
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-h) usage; shift;;
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--force) FORCE=1; shift;;
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--) shift; break;;
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esac
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done
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if [ $# != 0 ]
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then
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echo "Invalid argument. Use -h for help."
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exit 1
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fi
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declare WIPE_HDD=
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# Only wipe the rootfs and boot device disks
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rootfs_part=$(df --output=source / | tail -1)
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rootfs=$(readlink -f $(find -L /dev/disk/by-path/ -samefile $rootfs_part | sed 's/-part[0-9]*'//))
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boot_disk_part=$(df --output=source /boot | tail -1)
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boot_disk=$(readlink -f $(find -L /dev/disk/by-path/ -samefile $boot_disk_part | sed 's/-part[0-9]*'//))
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WIPE_HDD=$rootfs
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if [ "$rootfs" != "$boot_disk" ]
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then
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WIPE_HDD="$WIPE_HDD $boot_disk"
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fi
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# Due to dynamic partitioning, volume groups can have PVs across multiple disks.
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# When deleting the rootfs, we should also delete all PVs (across all disks) that
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# are part of volume groups that are also present on the rootfs.
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rootfs_vgs=$(pvdisplay -C --separator ' | ' -o pv_name,vg_name | grep $rootfs | awk '{print $3}' | sort -u)
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pvs_to_delete=""
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for vg in $rootfs_vgs
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do
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pv=$(pvdisplay --select "vg_name=$vg" | awk '/PV Name/{print $3}')
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pvs_to_delete="$pvs_to_delete $pv"
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done
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WIPE_HDD="$pvs_to_delete $WIPE_HDD"
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if [ ! $FORCE ]
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then
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echo "This will result in the loss of all data on the hard drives and"
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echo "will require this node to be re-installed."
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echo "The following disks will be wiped:"
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for dev in $WIPE_HDD
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do
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echo " $dev"
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done | sort
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echo
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read -p "Are you absolutely sure? [y/n] " -r
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if [[ ! $REPLY =~ ^[Yy]$ ]]
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then
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echo "Aborted"
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exit 1
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fi
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read -p "Type 'wipediskscompletely' to confirm: " -r
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if [[ ! $REPLY = "wipediskscompletely" ]]
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then
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echo "Aborted"
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exit 1
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fi
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fi
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for dev in $WIPE_HDD
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do
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if [[ -e $dev ]]
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then
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echo "Wiping $dev..."
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wipefs -f -a $dev
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# Clearing previous GPT tables or LVM data
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# Delete the first few bytes at the start and end of the partition. This is required with
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# GPT partitions, they save partition info at the start and the end of the block.
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dd if=/dev/zero of=$dev bs=512 count=34
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dd if=/dev/zero of=$dev bs=512 count=34 seek=$((`blockdev --getsz $dev` - 34))
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fi
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done
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if [[ -z $WIPE_HDD ]]
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then
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echo "No disks were detected."
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else
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sync
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echo "The disk(s) have been wiped."
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fi
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