429 lines
12 KiB
Bash
Executable File
429 lines
12 KiB
Bash
Executable File
#!/bin/bash
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#
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# Install to multiple ESPs
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set -e
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# Most of this is copy-paste from grub postinst, sigh.
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. /usr/share/debconf/confmodule
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# shamelessly stolen from ucf:
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#
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# Load our templates, just in case our template has
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# not been loaded or the Debconf DB lost or corrupted
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# since then.
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db_x_loadtemplatefile "$(dpkg-query --control-path grub-common templates)" grub-common
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###############################################################################
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# COPY FROM POSTINST
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###############################################################################
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# This only works on a Linux system with udev running. This is probably the
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# vast majority of systems where we need any of this, though, and we fall
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# back reasonably gracefully if we don't have it.
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cached_available_ids=
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available_ids()
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{
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local id path
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if [ "$cached_available_ids" ]; then
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echo "$cached_available_ids"
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return
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fi
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[ -d /dev/disk/by-id ] || return
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cached_available_ids="$(
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for path in /dev/disk/by-id/*; do
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[ -e "$path" ] || continue
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printf '%s %s\n' "$path" "$(readlink -f "$path")"
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done | sort -k2 -s -u | cut -d' ' -f1
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)"
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echo "$cached_available_ids"
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}
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# Returns non-zero and no output if no mapping can be found.
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device_to_id()
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{
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local id
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for id in $(available_ids); do
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if [ "$(readlink -f "$id")" = "$(readlink -f "$1")" ]; then
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echo "$id"
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return 0
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fi
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done
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# Fall back to the plain device name if there's no by-id link for it.
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if [ -e "$1" ]; then
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echo "$1"
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return 0
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fi
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return 1
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}
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# for Linux
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sysfs_size()
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{
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local num_sectors sector_size size
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# Try to find out the size without relying on a partitioning tool being
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# installed. This isn't too hard on Linux 2.6 with sysfs, but we have to
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# try a couple of variants on detection of the sector size.
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if [ -e "$1/size" ]; then
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num_sectors="$(cat "$1/size")"
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sector_size=512
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if [ -e "$1/queue/logical_block_size" ]; then
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sector_size="$(cat "$1/queue/logical_block_size")"
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elif [ -e "$1/queue/hw_sector_size" ]; then
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sector_size="$(cat "$1/queue/hw_sector_size")"
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fi
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size="$(expr "$num_sectors" \* "$sector_size" / 1000 / 1000)"
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fi
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[ "$size" ] || size='???'
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echo "$size"
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}
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# for kFreeBSD
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camcontrol_size()
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{
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local num_sectors sector_size size=
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if num_sectors="$(camcontrol readcap "$1" -q -s -N)"; then
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sector_size="$(camcontrol readcap "$1" -q -b)"
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size="$(expr "$num_sectors" \* "$sector_size" / 1000 / 1000)"
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fi
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[ "$size" ] || size='???'
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echo "$size"
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}
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maybe_udevadm()
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{
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if which udevadm >/dev/null 2>&1; then
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udevadm "$@" || true
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fi
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}
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# Parse /proc/mounts and find out the mount for the given device.
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# The device must be a real device in /dev, not a symlink to one.
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get_mounted_device()
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{
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mountpoint="$1"
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cat /proc/mounts | while read -r line; do
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set -f
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set -- $line
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set +f
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if [ "$2" = "$mountpoint" ]; then
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echo "$1"
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break
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fi
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done
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}
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###############################################################################
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# New or modified helpers
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###############################################################################
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# Fixed: Return nothing if the argument is empty
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get_mountpoint()
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{
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local relpath boot_mountpoint
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if [ -z "$1" ]; then
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return
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fi
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relpath="$(grub-mkrelpath "$1")"
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boot_mountpoint="${1#$relpath}"
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echo "${boot_mountpoint:-/}"
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}
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# Returns value in $RET, like a debconf command.
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#
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# Merged version of describe_disk and describe_partition, as disks can't be
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# valid ESPs on their own, so we can't render them as an entry.
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describe_efi_system_partition()
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{
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local disk part id path sysfs_path diskbase partbase size
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local disk_basename disk_size model
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disk="$1"
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part="$2"
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id="$3"
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path="$4"
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# BEGIN: Stolen from describe_disk
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model=
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case $(uname -s) in
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Linux)
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sysfs_path="$(maybe_udevadm info -n "$disk" -q path)"
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if [ -z "$sysfs_path" ]; then
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sysfs_path="/block/$(printf %s "${disk#/dev/}" | sed 's,/,!,g')"
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fi
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disk_size="$(sysfs_size "/sys$sysfs_path")"
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model="$(maybe_udevadm info -n "$disk" -q property | sed -n 's/^ID_MODEL=//p')"
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if [ -z "$model" ]; then
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model="$(maybe_udevadm info -n "$disk" -q property | sed -n 's/^DM_NAME=//p')"
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if [ -z "$model" ]; then
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model="$(maybe_udevadm info -n "$disk" -q property | sed -n 's/^MD_NAME=//p')"
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if [ -z "$model" ] && which dmsetup >/dev/null 2>&1; then
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model="$(dmsetup info -c --noheadings -o name "$disk" 2>/dev/null || true)"
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fi
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fi
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fi
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;;
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GNU/kFreeBSD)
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disk_basename=$(basename "$disk")
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disk_size="$(camcontrol_size "$disk_basename")"
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model="$(camcontrol inquiry "$disk_basename" | sed -ne "s/^pass0: <\([^>]*\)>.*/\1/p")"
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;;
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esac
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[ "$model" ] || model='???'
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# END: Stolen from describe_disk
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sysfs_path="$(maybe_udevadm info -n "$part" -q path)"
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if [ -z "$sysfs_path" ]; then
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diskbase="${disk#/dev/}"
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diskbase="$(printf %s "$diskbase" | sed 's,/,!,g')"
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partbase="${part#/dev/}"
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partbase="$(printf %s "$partbase" | sed 's,/,!,g')"
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sysfs_path="/block/$diskbase/$partbase"
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fi
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size="$(sysfs_size "/sys$sysfs_path")"
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db_subst grub-efi/partition_description DEVICE "$part"
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db_subst grub-efi/partition_description SIZE "$size"
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db_subst grub-efi/partition_description PATH "$path"
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db_subst grub-efi/partition_description DISK_MODEL "$model"
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db_subst grub-efi/partition_description DISK_SIZE "$disk_size"
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db_metaget grub-efi/partition_description description
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}
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# Parse /proc/mounts and find out the mount for the given device.
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# The device must be a real device in /dev, not a symlink to one.
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find_mount_point()
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{
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real_device="$1"
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cat /proc/mounts | while read -r line; do
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set -f
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set -- $line
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set +f
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if [ "$1" = "$real_device" -a "$3" = "vfat" ]; then
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echo "$2"
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break
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fi
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done
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}
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# Return all devices that are a valid ESP
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usable_efi_system_partitions()
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{
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local last_partition path partition partition_id
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local ID_PART_ENTRY_TYPE ID_PART_ENTRY_SCHEME
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last_partition=
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(
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for partition in /dev/disk/by-id/*; do
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ID_PART_ENTRY_TYPE=""
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ID_PART_ENTRY_SCHEME=""
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eval "$(udevadm info -q property -n "$partition" | grep -E '^ID_PART_ENTRY_(TYPE|SCHEME)=')"
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if [ -z "$ID_PART_ENTRY_TYPE" -o -z "$ID_PART_ENTRY_SCHEME" -o \
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\( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != dos \) -o \
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\( "$ID_PART_ENTRY_SCHEME" = gpt -a "$ID_PART_ENTRY_TYPE" != c12a7328-f81f-11d2-ba4b-00a0c93ec93b \) -o \
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\( "$ID_PART_ENTRY_SCHEME" = dos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then
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continue
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fi
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# unify the partition id
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partition_id="$(device_to_id "$partition" || true)"
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real_device="$(readlink -f "$partition")"
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path="$(find_mount_point $real_device)"
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echo "$path:$partition_id"
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done
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) | sort -t: -k2 -u
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}
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###############################################################################
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# MAGIC SCRIPT
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###############################################################################
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# Just do regular installation to /boot/efi on cloud images
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db_get grub-efi/cloud_style_installation || true
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if [ "$RET" = true ]; then
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grub-install "$@"
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touch /boot/grub/grub.cfg
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exit 0
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fi
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FALLBACK_MOUNTPOINT=/var/lib/grub/esp
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# Initial install/upgrade from /boot/efi?
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db_fget grub-efi/install_devices seen
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seen="$RET"
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# Get configured value
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question=grub-efi/install_devices
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priority=high
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db_get grub-efi/install_devices
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valid=1
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# We either migrate /boot/efi over, or we check if we have invalid devices
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if [ -z "$RET" ] && [ "$seen" != "true" ]; then
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echo "Trying to migrate /boot/efi into esp config"
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esp="$(get_mounted_device /boot/efi)"
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if [ "$esp" ]; then
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esp="$(device_to_id "$esp")"
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fi
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if [ "$esp" ]; then
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db_set grub-efi/install_devices "$esp"
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db_fset grub-efi/install_devices seen true
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RET="$esp"
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fi
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else
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for device in $RET; do
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if [ ! -e "${device%,}" ]; then
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valid=0
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break
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fi
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done
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fi
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# If /boot/efi points to a device that's not in the list, trigger the
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# install_devices_disks_changed prompt below, but add the device behind
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# /boot/efi to the defaults.
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boot_efi_device=$(get_mounted_device /boot/efi || true)
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if [ "$boot_efi_device" ]; then
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for device in $RET; do
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device="${device%,}"
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real_device="$(readlink -f "$device" || true)"
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if [ "$real_device" = "$boot_efi_device" ]; then
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boot_efi_device=""
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break
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fi
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done
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if [ "$boot_efi_device" ]; then
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boot_efi_device="$(device_to_id "$boot_efi_device" || true)"
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if [ "$RET" ]; then
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RET="$RET, $boot_efi_device"
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else
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RET="$boot_efi_device"
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fi
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valid=0
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fi
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fi
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if [ "$valid" = 0 ]; then
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question=grub-efi/install_devices_disks_changed
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priority=critical
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db_set "$question" "$RET"
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db_fset "$question" seen false
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db_fset grub-efi/install_devices_empty seen false
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fi
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while :; do
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ids=
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descriptions=
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partitions="$(usable_efi_system_partitions)"
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for partition_pair in $partitions; do
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partition_id="${partition_pair#*:}"
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device="${partition_id%%-part*}"
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ids="${ids:+$ids, }$partition_id"
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describe_efi_system_partition "$(readlink -f "$device")" "$(readlink -f "$partition_id")" "$partition_id" "$(get_mountpoint "${partition_pair%%:*}")"
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RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
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descriptions="${descriptions:+$descriptions, }$RET"
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done
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db_subst "$question" RAW_CHOICES "$ids"
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db_subst "$question" CHOICES "$descriptions"
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db_input "$priority" "$question" || true
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db_go
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db_get "$question"
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# Run the installer
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failed_devices=
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for i in `echo $RET | sed -e 's/, / /g'` ; do
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real_device="$(readlink -f "$i")"
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mntpoint=$(find_mount_point $real_device)
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if [ -z "$mntpoint" ]; then
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mntpoint=$FALLBACK_MOUNTPOINT
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mount $real_device $mntpoint
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fi
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echo "Installing grub to $mntpoint." >&2
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if _UBUNTU_ALTERNATIVE_ESPS="$RET" grub-install --efi-directory=$mntpoint "$@" ; then
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# We just installed GRUB 2; then also generate grub.cfg.
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touch /boot/grub/grub.cfg
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else
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failed_devices="$failed_devices $real_device"
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fi
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if [ "$mntpoint" = "$FALLBACK_MOUNTPOINT" ]; then
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umount $mntpoint
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fi
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done
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if [ "$question" != grub-efi/install_devices ] && [ "$RET" ]; then
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# XXX cjwatson 2019-02-26: The description of
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# grub-efi/install_devices_disks_changed ought to explain that
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# selecting no devices will leave the configuration unchanged
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# so that you'll be prompted again next time, but it's a bit
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# close to the Debian 10 release to be introducing new
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# translatable text. For now, it should be sufficient to
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# avoid losing configuration data.
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db_set grub-efi/install_devices "$RET"
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db_fset grub-efi/install_devices seen true
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fi
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if [ "$failed_devices" ]; then
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db_subst grub-efi/install_devices_failed FAILED_DEVICES "$failed_devices"
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db_fset grub-efi/install_devices_failed seen false
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if db_input critical grub-efi/install_devices_failed; then
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db_go
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db_get grub-efi/install_devices_failed
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if [ "$RET" = true ]; then
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break
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else
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db_fset "$question" seen false
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db_fset grub-efi/install_devices_failed seen false
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continue
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fi
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else
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exit 1 # noninteractive
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fi
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fi
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db_get "$question"
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if [ -z "$RET" ]; then
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# Reset the seen flag if the current answer is false, since
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# otherwise we'll loop with no indication of why.
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db_get grub-efi/install_devices_empty
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if [ "$RET" = false ]; then
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db_fset grub-efi/install_devices_empty seen false
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fi
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if db_input critical grub-efi/install_devices_empty; then
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db_go
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db_get grub-efi/install_devices_empty
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if [ "$RET" = true ]; then
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break
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else
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db_fset "$question" seen false
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db_fset grub-efi/install_devices_empty seen false
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fi
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else
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# if question was seen we are done
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# Otherwise, abort
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db_fget grub-efi/install_devices_empty seen
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if [ "$RET" = true ]; then
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break
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else
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exit 1
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fi
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fi
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else
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break
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fi
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done
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