162 lines
3.9 KiB
Bash
Executable File
162 lines
3.9 KiB
Bash
Executable File
#!/bin/sh
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# This script set a specific grub entry (winLOOSE…) for the next boot.
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# Then reboot the host
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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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## Debug mode to print specific messages
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DEBUG=1
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## Grub specific vars
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readonly GRUB_DEFAULT_PATH='/etc/default/grub'
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readonly GRUB_DEFAULT_DIR='/etc/default/grub.d'
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readonly WIN_GRUB="2"
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## By default, the host should reboot at the end of the script
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REBOOT=0
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HALT=1
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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,--debug|-h,--help|--halt,--poweroff|--reboot]
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Try to set a specific grub's entry for the next boot and
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reboot the host (default behaviour).
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EXAMPLES :
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- Set the grub entry ${WIN_GRUB} (Windows by default) and reboot
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${PROGNAME}
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- Set the grub entry ${WIN_GRUB} (Windows by default) and shutdown
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${PROGNAME} --halt
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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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--halt,--poweroff
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Ask to shutdown at the end of the script.
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--reboot
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Ask to reboot at the end of the script (default behaviour).
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EOF
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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} : ${local_debug_message}"
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}
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# }}}
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main() { # {{{
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# First check in Grub default dir if saved mode is set
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if grep -q -E -R -- "^GRUB_DEFAULT=saved" "${GRUB_DEFAULT_DIR}"
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then
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printf '%b' "Reboot to windaube partition\\n"
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sudo grub-reboot "${WIN_GRUB}"
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[ "${REBOOT}" -eq "0" ] && sudo systemctl reboot
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[ "${HALT}" -eq "0" ] && sudo systemctl poweroff
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fi
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# Otherwise check the default grub file
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if grep -q -E -- "^GRUB_DEFAULT=saved" "${GRUB_DEFAULT_PATH}"
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then
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printf '%b' "Reboot to windaube partition\\n"
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sudo grub-reboot "${WIN_GRUB}"
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[ "${REBOOT}" -eq "0" ] && sudo systemctl reboot
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[ "${HALT}" -eq "0" ] && sudo systemctl poweroff
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else
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printf '%b' "GRUB_DEFAULT is not set in 'saved' mode\\n"
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sudo sed -i 's/\(^GRUB_DEFAULT.*\)/#\1\nGRUB_DEFAULT=saved/' "${GRUB_DEFAULT_PATH}"
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GRUB_DEFAULT_ENTRY=$(grep -E -- "#GRUB_DEFAULT=" "${GRUB_DEFAULT_PATH}" | cut -d"=" -f2)
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sudo grub-set-default "${GRUB_DEFAULT_ENTRY}"
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sudo update-grub
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printf '%b' "Please launch this script (${PROGDIR}/${PROGNAME} ${ARGS}) once again.\\n"
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fi
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}
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# }}}
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# Manage arguments # {{{
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# This code can't be in a function due to arguments
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if [ ! "${NBARGS}" -eq "0" ]; then
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manage_arg="0"
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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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--halt|--poweroff ) ## A poweroff was requested
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REBOOT=1
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HALT=0
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;;
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--reboot ) ## A reboot was requested (default behaviour)
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REBOOT=0
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HALT=1
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;;
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-- ) ## End of options list
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## End the while loop
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break
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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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