Refactor to set up checks for systemd-boot and the firmware interface
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bin/nextboot
180
bin/nextboot
@ -1,25 +1,80 @@
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#!/usr/bin/env bash
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# Pretty name for firmware interface
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biosname="Firmware Configuration"
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# Check if systemd-boot is available
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bootctl is-installed &> /dev/null && sdboot=1
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# Check if rebooting to the firmware interface is supported
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[[ "$(bootctl reboot-to-firmware)" == "supported" ]] && fwboot=1
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picksdboot() {
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# Usage: picksdboot <title> <prompt>
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local entry PS3 COLUMNS
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PS3="$2 "
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COLUMNS=1
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# Print title to stderr
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printf "\n%s\n\n" "$1" >&2
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# Put all systemd-boot loder entry confs into an array
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mapfile -t sdbootlist < <(systemctl --boot-loader-entry=help)
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# Only add the firmware interface to the list if booting to it is supported
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[[ -v fwboot ]] && sdbootlist+=("$biosname")
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select entry in "${sdbootlist[@]}"; do
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break
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done
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printf "%s" "$entry"
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}
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pickefi() {
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# Usage: pickefi <title> <prompt>
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local bootnext PS3 COLUMNS
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PS3="$2 "
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COLUMNS=1
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# Print title to stderr
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printf "\n%s\n\n" "$1" >&2
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# This one is fun
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# mapfile splits stdin on \n to an array
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# The sed regex looks for an asterisk in the 8th position (0 indexed),
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# which marks an efi boot entry as "active", so those are the only ones
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# we care to add to the list.
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# It *seems* like one could put mapfile at the end of the pipeline, but
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# each command gets run in a subshell, so the array is lost. (ref: SC2031)
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mapfile -t efientries < <(efibootmgr | sed -n '/.\{8\}\*/p')
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# Rebooting to the firmware interface only works with systemd-boot, so only add
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# it to the EFI mode list if systemd-boot is available and it's supported
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[[ -v sdboot && -v fwboot ]] && efientries+=("$biosname")
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select efiselection in "${efientries[@]}"; do
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# If they chose the firmware interface
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if [[ "$efiselection" == "$biosname" ]]; then
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break
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else
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# Take only character 4-8 of the entry, which is the BOOTNUM
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bootnext="${efiselection:4:4}"
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break
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fi
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done
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printf "%s" "$bootnext"
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}
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# The pretty name we want to give to the firmware entry
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biosname="Firmware Interface"
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while getopts ":en" opt; do
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case $opt in
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e)
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# This one is fun
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# mapfile splits stdin on \n to an array
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# The sed regex looks for an asterisk in the 8th position (0 indexed)
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# It *seems* like one could put mapfile at the end of the pipeline, but
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# each command gets run in a subshell, so the array is lost. (ref: SC2031)
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mapfile -t efientries < <(efibootmgr | sed -n '/.\{8\}\*/p')
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PS3="EFI entry to BootNext: "
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COLUMNS=1
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select efiselection in "${efientries[@]}"; do
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bootnext="${efiselection:4:4}"
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break
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done
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sudo efibootmgr -q --bootnext "$bootnext"
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efimode=1
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;;
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n)
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noreboot=1
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@ -31,45 +86,66 @@ while getopts ":en" opt; do
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esac
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done
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# If -e wasn't set, and systemd-boot isn't installed, fail over to efimode anyways
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if [[ ! -v efimode && ! -v sdboot ]]; then
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echo "W: systemd-boot not installed. Choosing EFI boot entries instead..."
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efimode=1
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fi
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# If we are trying to set the EFI entry, this conditional isn't useful
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if [[ -v bootnext ]]; then
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:
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# If we aren't trying to set the EFI entry, and systemd-boot is installed
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elif [[ ! -v bootnext ]] && bootctl is-installed &> /dev/null; then
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# Select prompt options
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PS3="Select next boot entry: "
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COLUMNS=1
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select entry in $(systemctl --boot-loader-entry=help) "$biosname"; do
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if [[ "$entry" == "$biosname" ]]; then
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sudo bootctl reboot-to-firmware true
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break
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else
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sudo bootctl set-oneshot "$entry"
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break
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fi
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done
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# If we're in EFI mode
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if [[ -v efimode ]]; then
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title="Pick EFI boot entry"
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prompt="Entry"
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if [[ -v noreboot ]]; then
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prompt="$prompt for next boot:"
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elif [[ ! -v noreboot ]]; then
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prompt="$prompt to boot IMMEDIATELY:"
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else
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echo "E: idk how you got here..."
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exit 1
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fi
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# Prompt for the user's choice
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choice="$(pickefi "$title" "$prompt")"
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# A special case to boot into firmware interface
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if [[ "$choice" == "$biosname" ]]; then
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sudo bootctl reboot-to-firmware true
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elif [[ "$choice" != "$biosname" ]]; then
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sudo efibootmgr -q --bootnext "$choice"
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fi
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# If we're in systemd-boot mode
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elif [[ ! -v efimode ]]; then
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title="Pick systemd-boot entry config"
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prompt="Entry"
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if [[ -v noreboot ]]; then
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prompt="$prompt for next boot:"
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elif [[ ! -v noreboot ]]; then
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prompt="$prompt to boot IMMEDIATELY:"
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else
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echo "E: idk how you got here either..."
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exit 1
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fi
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# Prompt for the user's choice
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choice="$(picksdboot "$title" "$prompt")"
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# A special case to boot into firmware interface
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if [[ "$choice" == "$biosname" ]]; then
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sudo bootctl reboot-to-firmware true
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elif [[ "$choice" != "$biosname" ]]; then
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sudo bootctl set-oneshot "$choice"
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# Add an option to speed past the boot menu, since we've already
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# chosen the desired entry.
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rebootopts+=("--boot-loader-menu=1")
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fi
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else
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# If we've made it here, then we're not trying to set the EFI entry, and
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# systemd-boot is not installed in the ESP, so bail.
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echo "E: systemd-boot not installed. Exiting."
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echo "E: you DEFINITELY don't belong here..."
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exit 1
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fi
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# If we do want to reboot now, and we aren't setting the EFI entry
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if [[ ! -v noreboot && ! -v bootnext ]]; then
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# Reboot, and set a low timeout on the systemd-boot menu for next boot only
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sudo systemctl reboot --boot-loader-menu=1
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# If we do want to reboot now, and we are setting the EFI entry
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elif [[ ! -v noreboot && -v bootnext ]]; then
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# Get on with it
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sudo systemctl reboot
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# If we don't want to reboot now
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elif [[ -v noreboot ]]; then
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echo "Next boot set."
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exit 0
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# If things are otherwise fucked
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else
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echo "E: You shouldn't be here..."
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exit 1
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fi
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[[ ! -v noreboot ]] && sudo systemctl reboot "${rebootopts[@]}"
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