feat(iso): Crudely detect BIOS vs. UEFI intent (#7)
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73001c8e95
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107
setup.sh
107
setup.sh
@ -24,11 +24,17 @@ declare zpool_name zfs_arch_dataset_name
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zpool_name='zpool'
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zfs_arch_dataset_name='archlinux'
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declare -A partition_types
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partition_types[gpt_zfs]='6a85cf4d-1dd2-11b2-99a6-080020736631'
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partition_types[gpt_efi]='c12a7328-f81f-11d2-ba4b-00a0c93ec93b'
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partition_types[mbr_zfs]='0xbf'
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partition_types[mbr_boot]='0x83'
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# https://unix.stackexchange.com/a/48550
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set -E
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trap '[ "$?" -ne 77 ] || exit 77' ERR
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declare zpool_drive efi_drive
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declare zpool_drive efi_drive part_schema
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function we_are_changerooted () {
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if [ "$(stat -c '%d:%i' '/')" != "$(stat -c '%d:%i' '/proc/1/root/.')" ]; then
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@ -38,23 +44,51 @@ function we_are_changerooted () {
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fi
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}
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function no_kernel_update_in_iso () {
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function uefi_or_bios () {
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#1.1
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local part_count_linux part_count_efi
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# Select disks with at least one partition. Among them count how many
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# with the given partition type code we have.
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part_count_linux="$(get_partitions | jq --raw-output '[.[][] | select(.children | length > 0) | .children[] | select(.parttype=="'"${partition_types[mbr_boot]}"'") | .path] | length')"
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part_count_efi="$(get_partitions | jq --raw-output '[.[][] | select(.children | length > 0) | .children[] | select(.parttype=="'"${partition_types[gpt_efi]}"'") | .path] | length')"
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if [[ "${part_count_linux}" -eq '1' ]] && [[ "${part_count_efi}" -eq '0' ]]; then
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part_schema='mbr'
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>&3 printf -- '%s\n' \
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'Treating this as an MBR/legacy BIOS machine ...'
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elif [[ "${part_count_linux}" -eq '0' ]] && [[ "${part_count_efi}" -eq '1' ]]; then
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part_schema='gpt'
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>&3 printf -- '%s\n' \
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'Treating this as a GPT/UEFI machine ...'
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else
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>&3 printf -- '%s\n' \
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'We are seeing partitions as follows:' \
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'- Partition type code '"${partition_types[mbr_boot]}"': '"${part_count_linux}" \
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'- Partition type code '"${partition_types[gpt_efi]}"': '"${part_count_efi}" \
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'' \
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'We are instead expecting either 1 and 0 indicating a legacy' \
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'BIOS setup or 0 and 1 indicating UEFI. '"${part_count_linux}"' and '"${part_count_efi}"' is' \
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'neither. Cowardly exiting ...'
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exit 77
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fi
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}
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function no_kernel_update_in_iso () {
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#1.2
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sed -ri -e 's'$'\x1''#(IgnorePkg)[^\r\n\f]+'$'\x1''\1 = linux linux-headers'$'\x1''g' /etc/pacman.conf
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}
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function set_ntp () {
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#1.2
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#1.3
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timedatectl set-ntp true
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}
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function resize_cow_space () {
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#1.3
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#1.4
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mount -o remount,size='50%' /run/archiso/cowspace
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}
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function update_pacman_db () {
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#1.4
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#1.5
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printf -- '%s\n' 'Refreshing mirror list ...'
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systemctl start reflector
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# In an ISO and for the minimal number of packages we need we do not
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@ -63,13 +97,13 @@ function update_pacman_db () {
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}
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function install_pkgs () {
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#1.5
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#1.6
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printf -- '%s\n' 'Installing packages ...'
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pacman -S --needed --noconfirm "${@}"
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}
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function install_zfs () {
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#1.6
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#1.7
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declare reset_colors='\033[0m'
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curl -s 'https://raw.githubusercontent.com/eoli3n/archiso-zfs/master/init' | bash
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printf -- "${reset_colors}"
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@ -256,7 +290,7 @@ function export_pool () {
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}
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function setup_zpool () {
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#1.7
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#1.8
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local drive_by_id
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zpool_drive="$(select_part 'zfs')"
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drive_by_id="$(get_drive_id "${zpool_drive}")"
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@ -276,7 +310,7 @@ function setup_zpool () {
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}
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function mount_system () {
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#1.8
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#1.9
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zfs mount "${zpool_name}"'/root/'"${zfs_arch_dataset_name}"
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zfs mount -a
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@ -289,7 +323,7 @@ function mount_system () {
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}
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function copy_zpool_cache () {
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#1.9
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#1.10
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mkdir -p '/mnt/etc/zfs'
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zpool set 'cachefile=/etc/zfs/'"${zpool_name}"'.cache' "${zpool_name}"
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}
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@ -309,7 +343,7 @@ function pacman_dont_check_space () {
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}
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function install_archlinux () {
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#1.10
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#1.11
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pacman_dl_parallel
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pacman_dont_check_space
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pacstrap /mnt \
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@ -336,7 +370,7 @@ function install_archlinux () {
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}
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function gen_fstab () {
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#1.11
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#1.12
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genfstab -U /mnt | grep -v "${zpool_name}" | tr -s '\n' | sed -r -e 's/\/mnt//' -e '/./,$!d' > '/mnt/etc/fstab'
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}
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@ -349,7 +383,7 @@ EOF
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}
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function set_hostname () {
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#1.12
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#1.13
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declare new_hostname
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install_pkgs 'pwgen'
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new_hostname="$(pwgen --no-numerals --no-capitalize --ambiguous 8)"
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@ -358,7 +392,7 @@ function set_hostname () {
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}
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function set_locale () {
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#1.13
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#1.14
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printf -- '%s\n' \
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'KEYMAP=de-latin1' \
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'FONT=Lat2-Terminus16' \
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@ -369,7 +403,7 @@ function set_locale () {
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}
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function add_zfs_hook_to_initramfs () {
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#1.14
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#1.15
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# Add zfs hook, remove fsck hook from initramfs.
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sed -ri \
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-e 's'$'\x1''(HOOKS=)(.*?[\(| ])(filesystems)([\)| ][^\r\n\f]*)'$'\x1''\1\2zfs \3\4'$'\x1''g' \
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@ -384,7 +418,7 @@ function add_zfs_hook_to_initramfs () {
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}
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function set_initramfs_build_list () {
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#1.15
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#1.16
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# No need to build fallback initramfs, our new fallback is ZFS snapshots
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sed -ri \
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-e '/^#/d' \
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@ -398,7 +432,7 @@ function set_initramfs_build_list () {
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}
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function add_zfs_files_to_new_os () {
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#1.16
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#1.17
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for zfs_file in '/etc/hostid' '/etc/zfs/zpool.cache' $([[ ! "${ARCHZBM_ZFSPROPS_NO_ENCRYPTION}" ]] && printf -- '%s' '/etc/zfs/'"${zpool_name}"'.key'); do
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rsync -av --itemize-changes {'','/mnt'}"${zfs_file}"
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done
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@ -571,7 +605,11 @@ Kernel:
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CommandLine: ro loglevel=0 zbm.import_policy=hostid
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Prefix: vmlinuz
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EOF
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# Up here maybe 'ro quiet' instead of 'ro'
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# Up here maybe 'ro quiet' instead of 'ro'. This is ZFSBootMenu's kernel
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# command line.
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# Assign cmdline for final kernel start. This is our Arch Linx kernel
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# command line.
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zfs set org.zfsbootmenu:commandline='rw nowatchdog rd.vconsole.keymap=de-latin1' "${zpool_name}"'/root/'"${zfs_arch_dataset_name}"
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}
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@ -752,22 +790,23 @@ function main () {
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if we_are_changerooted; then
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install_os_in_chroot #2.2
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else
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no_kernel_update_in_iso #1.1
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set_ntp #1.2
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resize_cow_space #1.3
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update_pacman_db #1.4
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install_pkgs 'jq' #1.5
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install_zfs #1.6
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setup_zpool #1.7
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mount_system #1.8
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copy_zpool_cache #1.9
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install_archlinux #1.10
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gen_fstab #1.11
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set_hostname #1.12
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set_locale #1.13
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add_zfs_hook_to_initramfs #1.14
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set_initramfs_build_list #1.15
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add_zfs_files_to_new_os #1.16
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uefi_or_bios #1.1
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no_kernel_update_in_iso #1.2
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set_ntp #1.3
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resize_cow_space #1.4
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update_pacman_db #1.5
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install_pkgs 'jq' #1.6
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install_zfs #1.7
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setup_zpool #1.8
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mount_system #1.9
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copy_zpool_cache #1.10
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install_archlinux #1.11
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gen_fstab #1.12
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set_hostname #1.13
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set_locale #1.14
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add_zfs_hook_to_initramfs #1.15
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set_initramfs_build_list #1.16
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add_zfs_files_to_new_os #1.17
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enter_chroot #2.1
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# We're done in chroot
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finalize_os_setup #3.1
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