New script to reboot on UEFI Windows
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#!/bin/sh
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#
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# Purpose {{{
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# This script will reboot on Windows system
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# 1. Try to get UEFI entry number for Windows.
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# 2. Define it as default only for next boot.
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# 3. Reboot (default) or poweroff the system.
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# …
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#
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# 2023-08-18
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# }}}
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# Flags {{{
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## Exit on error {{{
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set -o errexit
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## }}}
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## Exit on unset var {{{
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### Use "${VARNAME-}" to test a var that may not have been set
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set -o nounset
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## }}}
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## Pipeline command is treated as failed {{{
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### Not available in POSIX sh − https://github.com/koalaman/shellcheck/wiki/SC3040
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#set -o pipefail
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## }}}
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## Help with debugging {{{
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### Call the script by prefixing it with "TRACE=1 ./script.sh"
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if [ "${TRACE-0}" -eq 1 ]; then set -o xtrace; fi
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## }}}
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# }}}
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# Vars {{{
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PROGNAME=$(basename "${0}"); readonly PROGNAME
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PROGDIR=$(readlink --canonicalize-missing $(dirname "${0}")); readonly PROGDIR
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ARGS="${*}"; readonly ARGS
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readonly NBARGS="${#}"
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[ -z "${DEBUG-}" ] && DEBUG=1
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## Export DEBUG for sub-script
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export DEBUG
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## Default values for some vars
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readonly FLAG_REBOOT_DEFAULT="0"
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readonly FLAG_POWEROFF_DEFAULT="1"
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readonly WINDOWS_BASE_LABEL_DEFAULT="Windows"
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## Colors
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readonly PURPLE='\033[1;35m'
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readonly RED='\033[0;31m'
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readonly RESET='\033[0m'
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readonly COLOR_DEBUG="${PURPLE}"
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# }}}
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usage() { # {{{
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cat <<- HELP
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usage: $PROGNAME [-d|-h|-l|-r|-s]
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Try to reboot to Windows system.
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EXAMPLES :
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- Reboot to Windows system
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${PROGNAME}
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- Define Windows for next boot but poweroff the system
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${PROGNAME} --poweroff
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- Search for a specific Windows label
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${PROGNAME} --label "Windows Boot Manager"
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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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-l,--label,--windows-label
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Define a different label to search for Windows UEFI entry.
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(default: ${WINDOWS_BASE_LABEL_DEFAULT})
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-r,--reboot
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Reboot the system (default behaviour).
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-s,--shutdown,--poweroff,--halt
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Ask to shutdown the system.
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-u,--uefi,--uefi-entry
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Define the UEFI entry to use.
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(default: first matching from efibootmgr + windows-label)
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HELP
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}
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# }}}
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debug_message() { # {{{
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local_debug_message="${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} : ${local_debug_message}"
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unset local_debug_message
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return 0
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}
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# }}}
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error_message() { # {{{
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local_error_message="${1}"
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local_error_code="${2}"
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## Print message
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printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}" >&2
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unset local_error_message
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exit "${local_error_code:=66}"
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}
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# }}}
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define_vars() { # {{{
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debug_message "-- Define vars BEGIN"
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# If flag_reboot wasn't defined (argument) {{{
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if [ -z "${flag_reboot-}" ]; then
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## Use default value
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readonly flag_reboot="${FLAG_REBOOT_DEFAULT}"
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fi
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# }}}
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# If flag_poweroff wasn't defined (argument) {{{
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if [ -z "${flag_poweroff-}" ]; then
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## Use default value
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readonly flag_poweroff="${FLAG_POWEROFF_DEFAULT}"
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fi
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# }}}
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# If windows_base_label wasn't defined (argument) {{{
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if [ -z "${windows_base_label-}" ]; then
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## Use default value
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readonly windows_base_label="${WINDOWS_BASE_LABEL_DEFAULT}"
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fi
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# }}}
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# If windows_uefi_entry wasn't defined (argument) {{{
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if [ -z "${windows_uefi_entry-}" ]; then
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## Try to get the first matching entry with efibootmgr + windows_base_label
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debug_message "||define_vars − \
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Try to get Windows UEFI entry with 'efibootmgr' + windows-label (${windows_base_label})."
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windows_uefi_entry=$(efibootmgr | grep --extended-regexp --max-count=1 -- ".*${windows_base_label}.*" | cut --characters=5-8)
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fi
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# }}}
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# If windows_uefi_entry remains empty {{{
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if [ -z "${windows_uefi_entry-}" ]; then
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error_message "windows_uefi_entry seems empty! Verify the windows_base_label used (${windows_base_label}) and your UEFI configuration ('efibootmgr -v')." 11
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elif [ -n "${windows_uefi_entry}" ]; then
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debug_message "||define_vars − \
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The ${RED}${windows_uefi_entry}${COLOR_DEBUG} UEFI entry will be used for Windows."
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else
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error_message "I am not supposed to happen!" 12
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fi
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# }}}
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debug_message "-- Define vars END"
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}
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# }}}
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is_command_available() { # {{{
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local_command_available_cmd="${1}"
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debug_prefix="${2:-}"
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## Return False by default
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return_command_available="1"
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if [ "$(command -v ${local_command_available_cmd})" ]; then
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debug_message "${debug_prefix}is_command_available − \
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${RED}${local_command_available_cmd}${COLOR_DEBUG} seems present on this host."
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return_command_available="0"
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else
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debug_message "${debug_prefix}is_command_available − \
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${RED}${local_command_available_cmd}${COLOR_DEBUG} is not available on this host."
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return_command_available="1"
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fi
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unset local_command_available_cmd
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unset debug_prefix
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return "${return_command_available}"
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}
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# }}}
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main() { # {{{
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debug_message "--- MAIN BEGIN"
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## If a command is missing {{{
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### Exit with error message
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is_command_available "efibootmgr" "| " \
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|| error_message "No test_me command available. Please install efibootmgr package with your package manager." 01
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## }}}
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## Define all vars
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define_vars
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## If the expected UEFI entry doesn't exists {{{
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if ! sudo efibootmgr | grep --quiet -- "Boot${windows_uefi_entry}"; then
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error_message "The expected UEFI entry (${windows_uefi_entry}) doesn't seem to exist…" 21
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fi
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## }}}
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## Define next boot entry
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sudo efibootmgr --quiet --bootnext "${windows_uefi_entry}"
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## If BootNext entry doesn't match {{{
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if ! sudo efibootmgr | grep --quiet -- "BootNext: ${windows_uefi_entry}"; then
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error_message "The expected UEFI entry (${windows_uefi_entry}) doesn't seem to be the next one (see 'sudo efibootmgr' BootNext entry)." 22
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fi
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## }}}
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printf '%b' "Reboot/shutdown as requested to winbouse partition\\n"
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[ "${flag_reboot}" -eq "0" ] && sudo systemctl reboot
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[ "${flag_poweroff}" -eq "0" ] && sudo systemctl poweroff
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debug_message "--- MAIN END"
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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 [ ! "${NBARGS}" -eq "0" ]; then
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manage_arg="0"
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## If the first argument ask for help (h|help|-h|-help|-*h|-*help) {{{
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if printf -- '%s' "${1-}" | grep --quiet --extended-regexp -- "^-*h(elp)?$"; then
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usage
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exit 0
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fi
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## }}}
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## If the first argument is not an option
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if ! printf -- '%s' "${1}" | grep --quiet --extended-regexp -- "^-+";
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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' "${1-}" | grep --quiet --extended-regexp -- "^-+"; do
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case "${1}" in
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-d|--debug ) ## debug
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DEBUG=0
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debug_message "--- Manage argument BEGIN"
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;;
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-h|--help ) ## help message (if it's not the first option)
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usage
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exit 0
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;;
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-l|--label|--windows-label ) ## Set windows_base_label var
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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 windows_base_label="${1}"
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;;
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-r|--reboot ) ## If a reboot was requested (default behaviour)
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flag_reboot="0"
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flag_poweroff="1"
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;;
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-s|--shutdown|--poweroff|--halt ) ## If a poweroff was requested
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flag_reboot="1"
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flag_poweroff="0"
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;;
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-u|--uefi|--uefi-entry ) ## Set windows_uefi_entry var
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## Move to the next argument
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shift
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## Define var
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readonly windows_uefi_entry="${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 "| ${RED}${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 "| ${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
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else
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debug_message "| No arguments/options to manage."
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fi
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debug_message "--- Manage argument END"
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# }}}
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main
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exit 255
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