Script to wipe hdds content
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#!/bin/sh
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#
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# Purpose {{{
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# This script will try to clean the content of the two firsts hdd
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# 1. Remove everything related to LVM
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# 2. Remove partitions
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#
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# 2021-12-08
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# }}}
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# Vars {{{
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readonly PROGNAME=$(basename "${0}")
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readonly PROGDIR=$(readlink -m $(dirname "${0}"))
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readonly ARGS="${*}"
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readonly NBARGS="${#}"
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[ -z "${DEBUG}" ] && DEBUG=1
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## Export DEBUG for sub-script
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export DEBUG
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# Default values for some vars
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#readonly MY_VAR_XY_DEFAULT="666"
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## Colors
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readonly PURPLE='\033[1;35m'
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readonly RED='\033[0;31m'
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readonly RESET='\033[0m'
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readonly COLOR_DEBUG="${PURPLE}"
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# }}}
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usage() { # {{{
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cat <<- EOF
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usage: $PROGNAME [-d|-h]
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Remove everything related to /dev/sda and /dev/sdb
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EXAMPLES :
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- Remove sda and sdb partitions
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${PROGNAME}
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OPTIONS :
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-d,--debug
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Enable debug messages.
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-h,--help
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Print this help message.
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EOF
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}
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# }}}
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debug_message() { # {{{
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local_message="${1}"
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## Print message if DEBUG is enable (=0)
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_message}"
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return 0
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}
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# }}}
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error_message() { # {{{
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local_error_message="${1}"
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local_error_code="${2}"
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## Print message if DEBUG is enable (=0)
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[ "${DEBUG}" -eq "0" ] && printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}"
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exit "${local_error_code:=66}"
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}
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# }}}
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install_dependencies() { # {{{
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## Update APT repositories {{{
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## OR exit
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debug_message "install_dependencies − \
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Update repositories…"
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apt update > /dev/null \
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|| exit 1
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## }}}
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## Install dependencies {{{
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## OR exit
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debug_message "install_dependencies − \
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Install some packages…"
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apt install -y coreutils e2fsprogs gawk lvm2 thin-provisioning-tools parted util-linux > /dev/null \
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|| exit 2
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## }}}
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}
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# }}}
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is_vg_available() { # {{{
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## Return False by default
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return_is_vg_available="1"
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## If at least 1 VG is available
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if [ `vgs --noheadings | wc --line` -gt 0 ]; then
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debug_message "is_vg_available − \
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At least one Volume Group is ${RED}available${COLOR_DEBUG}."
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return_is_vg_available="0"
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else
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debug_message "is_vg_available − \
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${RED}No${COLOR_DEBUG} Volume Group available on this host."
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return_is_vg_available="1"
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fi
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return "${return_is_vg_available}"
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}
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# }}}
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remove_vg() { # {{{
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local_vg_name="${1}"
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## Return False by default
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return_remove_vg="1"
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## If the Volume Group is successfully removed
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if vgremove "${local_vg_name}" ; then
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debug_message "remove_vg − \
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${local_vg_name} Volume Group was successfully ${RED}removed${COLOR_DEBUG}."
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return_remove_vg="0"
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else
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debug_message "remove_vg − \
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Error with ${RED}vgremove${COLOR_DEBUG} command."
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return_remove_vg="1"
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fi
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return "${return_remove_vg}"
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}
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# }}}
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is_pv_available() { # {{{
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## Return False by default
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return_is_pv_available="1"
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## If at least 1 PV is available
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if [ `pvs --noheadings | wc --line` -gt 0 ]; then
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debug_message "is_pv_available − \
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At least one Physical Volume is ${RED}available${COLOR_DEBUG}."
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return_is_pv_available="0"
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else
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debug_message "is_pv_available − \
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${RED}No${COLOR_DEBUG} Physical Volume available on this host."
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return_is_pv_available="1"
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fi
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return "${return_is_pv_available}"
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}
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# }}}
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remove_pv() { # {{{
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local_pv_path="${1}"
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## Return False by default
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return_remove_pv="1"
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## If the Physical Volume is successfully removed
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if pvremove "${local_pv_path}" ; then
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debug_message "remove_pv − \
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${local_pv_path} was successfully ${RED}removed${COLOR_DEBUG}."
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return_remove_pv="0"
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else
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debug_message "remove_pv − \
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Error with ${RED}pvremove${COLOR_DEBUG} command."
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return_remove_pv="1"
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fi
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return "${return_remove_pv}"
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}
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# }}}
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main() { # {{{
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## Install dependencies
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install_dependencies
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## If a Volume Group is available {{{
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## AND Disable all Volume Group (and related Logical Volumes)
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while is_vg_available; do
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### Get first Volume Group name
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vg_name=$(vgs --noheadings | awk '{ print $1; exit }')
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### Ensure to disable all Volume Group
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debug_message "main − \
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Disable all Volume Group and related Logical Volumes."
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vgchange --quiet --activate n
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### Try to remove the Volume Group
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### OR exit
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remove_vg "${vg_name}" \
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|| error_message "Error while trying to remove ${vg_name} Volume Group. Use --debug option for more informations." 3
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done
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## }}}
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## If a Physical Volume is available {{{
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while is_pv_available; do
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### Get first Physical Volume path
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pv_path=$(pvs --noheadings | awk '{ print $1; exit }')
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debug_message "main − \
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Try to manage ${RED}${pv_path}${COLOR_DEBUG} Physical Volume."
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### Try to remove the Physical Volume
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### OR exit
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remove_pv "${pv_path}" \
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|| error_message "Error while trying to remove ${pv_path} Physical Volume. Use --debug option for more informations." 4
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done
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## }}}
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## If a Physical Volume is available {{{
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while is_pv_available; do
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### Get first Physical Volume path
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pv_path=$(pvs --noheadings | awk '{ print $1; exit }')
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debug_message "main − \
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Try to manage ${RED}${pv_path}${COLOR_DEBUG} Physical Volume."
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### Try to remove the Physical Volume
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### OR exit
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remove_pv "${pv_path}" \
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|| error_message "Error while trying to remove ${pv_path} Physical Volume. Use --debug option for more informations." 4
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done
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## }}}
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# Remove all old partitions for sda and sdb {{{
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for hdd in /dev/sda /dev/sdb; do
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## Start partition number to 32
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part_number="32"
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while [ "${part_number}" -gt 0 ]
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do
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### If partition exists {{{
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if [ -b "${hdd}${part_number}" ]; then
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debug_message "main − \
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Try to remove ${hdd}${part_number} partition."
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parted "${hdd}" rm "${part_number}" \
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|| error_message "Can't remove ${hdd}${part_number} partition." 5
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fi
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### }}}
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### Decrease partition number
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part_number=$(($part_number-1))
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done
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done
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## }}}
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printf '%b\n' "All disks were successfully cleaned. \
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You can reboot the system to update mtab."
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}
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# }}}
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# Manage arguments # {{{
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# This code can't be in a function due to argument management
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if [ ! "${NBARGS}" -eq "0" ]; then
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manage_arg="0"
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## If the first argument is not an option
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if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
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then
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## Print help message and exit
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printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
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printf '%b\n' "---"
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usage
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exit 1
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fi
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# Parse all options (start with a "-") one by one
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while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
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case "${1}" in
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-d|--debug ) ## debug
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DEBUG=0
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;;
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-h|--help ) ## help
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usage
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## Exit after help informations
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exit 0
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;;
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#-v|--var ) ## Define var with given arg
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### Move to the next argument
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#shift
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### Define var
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#readonly my_var_xy="${1}"
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#;;
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* ) ## unknow option
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printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
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printf '%b\n' "---"
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usage
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exit 1
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;;
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esac
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debug_message "Arguments management − \
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${RED}${1}${COLOR_DEBUG} option managed."
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## Move to the next argument
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shift
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manage_arg=$((manage_arg+1))
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done
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debug_message "Arguments management − \
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${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
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else
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debug_message "Arguments management − \
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No arguments/options to manage."
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fi
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# }}}
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main
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exit 0
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