| commit | author | age | ||
| 6d1575 | 1 | #!/bin/bash |
| OB | 2 | # olbohlen@eenfach.de 2022-11-30, rewrite of previous destroy scripts |
| 3 | ||
| 4 | NOOP="" | |
| 5 | FAST="" | |
| 6 | DEBUG=/usr/bin/true | |
| 7 | ||
| 8 | # get arguments | |
| 9 | while getopts dfn argv 2>/dev/null; do | |
| 10 | case ${argv} in | |
| 11 | n) | |
| 12 | # sim-mode | |
| 13 | NOOP=/usr/bin/true | |
| 14 | ;; | |
| 15 | d) | |
| 16 | # debug mode | |
| 17 | DEBUG="" | |
| 18 | ;; | |
| 19 | f) | |
| 20 | # fast mode, no sleep (till Brooklyn) | |
| 21 | FAST=/usr/bin/true | |
| 22 | ;; | |
| 23 | *) | |
| 24 | cat <<EOF | |
| 25 | Usage: $0 [ -nd ] | |
| 26 | -n no-operation | |
| 27 | -d debug output | |
| 28 | EOF | |
| 29 | ;; | |
| 30 | esac | |
| 31 | done | |
| 32 | ||
| 33 | ||
| 34 | # destroy partitions, partition headers | |
| 35 | ||
| 36 | RHTINSTDEV=$(lsblk -firnp | awk '$4~/RHTINST/ { print $1}' | sed -e 's,[0-9]*$,,') | |
| 37 | ||
| 38 | DEVLIST=$(lsblk -irnp | awk '$6~/^disk$/ { print $1 }' | grep -v ${RHTINSTDEV}) | |
| 39 | ||
| 40 | printf "Going to wipe following disks:\n%s" "${DEVLIST}" | |
| 41 | ||
| 42 | ${FAST} printf "Hit C-c now to cancel...sleeping for 10 seconds...\n" | |
| 43 | ${FAST} sleep 10 | |
| 44 | ||
| 45 | for dev in ${DEVLIST}; do | |
| 46 | # get partition table | |
| 47 | partout=$(parted ${dev} unit B print) | |
| 48 | ||
| 49 | disksize=$(printf "%s" "${partout}" | awk '$0~/^Disk \/dev\/.*B$/ { print $NF}') | |
| 50 | ||
| 51 | printf "wiping partition headers on %s...\n" "${dev}" | |
| 52 | for poffset in $(printf "%s" "${partout}" | awk '$1~/^[0-9]*$/ && $2~/B$/ { print $2 }'); do | |
| 53 | printf "64MB NULL at %s..." ${poffset} | |
| 54 | ${DEBUG} echo dd if=/dev/zero of=${dev} obs=1024 seek=$(( ${poffset%%B} / 1024 )) count=$(( 64 * 1024 * 1024 )) | |
| 55 | ${NOOP} dd if=/dev/zero of=${dev} obs=1024 seek=$(( ${poffset%%B} / 1024 )) count=$(( 64 * 1024 * 1024 )) | |
| 56 | printf "done\n" | |
| 57 | done | |
| 58 | ||
| 59 | printf "wiping last 64MB on disk to kill GPT backup..." | |
| 60 | ${DEBUG} echo dd if=/dev/zero of=${dev} obs=1024 seek=$(( ${disksize%%B} - ( 64 * 1024 * 1024 ) / 1024 )) count=$(( 64 * 1024 * 1024 )) | |
| 61 | ${NOOP} dd if=/dev/zero of=${dev} obs=1024 seek=$(( ${disksize%%B} - ( 64 * 1024 * 1024 ) / 1024 )) count=$(( 64 * 1024 * 1024 )) | |
| 62 | printf "done\n" | |
| 63 | printf "now wiping the first 64MB on disk to kill the GPT..." | |
| 64 | ${DEBUG} dd if=/dev/zero of=${dev} obs=1024 count=$(( 64 * 1024 * 1024 )) | |
| 65 | ${NOOP} dd if=/dev/zero of=${dev} obs=1024 count=$(( 64 * 1024 * 1024 )) | |
| 66 | ||
| 67 | done | |
| 68 | printf "Partition and Filesystem headers should be clean now stopping system" | |
| 69 | ${FAST} printf " in 10 seconds\n" | |
| 70 | ${FAST} sleep 10 | |
| 71 | ${NOOP} poweroff | |
| 72 | ||
