#!/bin/bash # Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr> # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. SYS_BLOCK_PATH="/sys/class/block" DEV_PATH="/dev" DEVICE="device" VENDOR="vendor" MODEL="model" NAME="name" KERNEL="kernel" IMG="img" KERNEL_MODULES="modules/lib" KERNEL_PARTITION_INDEX=1 ROOTFS_PARTITION_INDEX=2 # Size in blocks (512 kiB) GPT_SIZE=34 KERNEL_SIZE=16384 usage() { printf "$executable [action] [storage] [rootfs tarball|kernel files] [medium]\n" >&2 printf "\nActions:\n" >&2 printf " partitions - Setup partitions on storage\n" >&2 printf " rootfs - Install rootfs tarball to storage\n" >&2 printf " kernel - Install kernel files to storage\n" >&2 usage_storage printf "\nEnvironment variables:\n" >&2 printf " KERNEL_PATH - Path to the kernel image\n" >&2 printf " VBOOT_TOOLS_PATH - Path to vboot tools\n" >&2 } usage_storage() { printf "\nStorage:\n" >&2 local nodes=$( ls "$SYS_BLOCK_PATH" ) local node_path local name for node in $nodes do node_path="$DEV_PATH/$node" if ! [ -b "$node_path" ] then continue fi name=$( storage_name "$node_path" ) if [ -z "$name" ] then continue fi printf " $node_path - $name\n" >&2 done } storage_affect_confirm() { local storage_path=$1 local name=$( storage_name "$storage_path" ) local confirm printf "This is going to affect the following storage:\n" printf " $storage_path - $name\n" printf "Press enter to confirm: " read confirm } storage_name() { local storage_path=$1 local node=$( basename "$storage_path" ) local vendor_path="$SYS_BLOCK_PATH/$node/$DEVICE/$VENDOR" local model_path="$SYS_BLOCK_PATH/$node/$DEVICE/$MODEL" local name_path="$SYS_BLOCK_PATH/$node/$DEVICE/$NAME" local vendor local name if [ -f "$model_path" ] then name=$( cat "$model_path" ) elif [ -f "$name_path" ] then name=$( cat "$name_path" ) else return 0 fi name=$( echo "$name" | sed -e "s/^[[:space:]]*//;s/[[:space:]]*$//" ) if [ -f "$vendor_path" ] then vendor=$( cat "$vendor_path" ) vendor=$( echo "$vendor" | sed -e "s/^[[:space:]]*//;s/[[:space:]]*$//" ) name="$vendor $name" fi echo "$name" } storage_partition_path() { local storage_path=$1 local index=$2 storage_partition_path="$storage_path$index" if ! [ -b "$storage_partition_path" ] then storage_partition_path="$storage_path""p$index" fi if ! [ -b "$storage_partition_path" ] then return 1 fi echo "$storage_partition_path" } storage_partition_mount_path() { local storage_partition_path=$1 local storage_partition_mount_path=$( udisksctl info -b "$storage_partition_path" | grep "MountPoints" | sed "s/.*MountPoints:[[:space:]]*\(.*\)/\1/g" ) echo "$storage_partition_mount_path" } partitions() { local storage_path=$1 local storage_rootfs_path local partitions local start storage_affect_confirm "$storage_path" partitions=$( mount | grep -P "^$storage_path" | sed "s/^\([^[:space:]]*\).*/\1/g" ) for partition in $partitions do # Partition may already be unmounted. udisksctl unmount -b "$partition" || true done ( echo "g" ; echo "w" ) | fdisk "$storage_path" cgpt create "$storage_path" start=$GPT_SIZE size=$KERNEL_SIZE cgpt add -b "$start" -s "$size" -P 1 -S 1 -t kernel -l kernel "$storage_path" start=$(( $start + $size )) size=$( cgpt show "$storage_path" | grep "Sec GPT table" | sed "s/[[:space:]]*\([0-9]*\).*/\1/g" ) size=$(( $size - $start )) cgpt add -b "$start" -s "$size" -t rootfs -l rootfs "$storage_path" blockdev --rereadpt "$storage_path" || partprobe "$storage_path" storage_rootfs_path=$( storage_partition_path "$storage_path" "$ROOTFS_PARTITION_INDEX" ) mkfs.ext4 -F "$storage_rootfs_path" printf "\nSetup partitions on storage $storage_path\n" } rootfs() { local storage_path=$1 local rootfs_tarball_path=$2 local storage_rootfs_path=$( storage_partition_path "$storage_path" "$ROOTFS_PARTITION_INDEX" ) local storage_rootfs_mount_path storage_affect_confirm "$storage_path" # Partition may already be mounted. udisksctl mount -b "$storage_rootfs_path" || true storage_rootfs_mount_path=$( storage_partition_mount_path "$storage_rootfs_path" ) tar -xf "$rootfs_tarball_path" -ps -C "$storage_rootfs_mount_path" udisksctl unmount -b "$storage_rootfs_path" printf "\nInstalled rootfs on storage $storage_path\n" } kernel() { local storage_path=$1 local kernel_files_path=$2 local medium=$3 local storage_kernel_path=$( storage_partition_path "$storage_path" "$KERNEL_PARTITION_INDEX" ) local storage_rootfs_path=$( storage_partition_path "$storage_path" "$ROOTFS_PARTITION_INDEX" ) local kernel_image_path="$kernel_files_path/$KERNEL-$medium.$IMG" local kernel_modules_path="$kernel_files_path/$KERNEL_MODULES" local storage_rootfs_mount_path storage_affect_confirm "$storage_path" cat "$kernel_image_path" > "$storage_kernel_path" sync # Partition may already be mounted. udisksctl mount -b "$storage_rootfs_path" || true storage_rootfs_mount_path=$( storage_partition_mount_path "$storage_rootfs_path" ) rsync -a --keep-dirlinks "$kernel_modules_path" "$storage_rootfs_mount_path/" sync udisksctl unmount -b "$storage_rootfs_path" printf "\nInstalled kernel on storage $storage_path\n" } requirements() { local requirement local requirement_path for requirement in "$@" do requirement_path=$( which "$requirement" || true ) if [ -z "$requirement_path" ] then printf "Missing requirement: $requirement\n" >&2 exit 1 fi done } setup() { root=$( realpath "$( dirname "$0" )" ) executable=$( basename "$0" ) if [ -z "$KERNEL_PATH" ] then KERNEL_PATH=$root fi if ! [ -z "$VBOOT_TOOLS_PATH" ] then PATH="$PATH:$VBOOT_TOOLS_PATH" fi } cros_medium_setup() { local action=$1 local storage_path=$2 local rootfs_tarball_path=$3 local kernel_files_path=$3 local medium=$4 set -e setup "$@" if [ -z "$action" ] || [ -z "$storage_path" ] then usage exit 1 fi case $action in "partitions") requirements "udisksctl" "fdisk" "cgpt" "mkfs.ext4" partitions "$storage_path" ;; "rootfs") if [ -z "$rootfs_tarball_path" ] then usage exit 1 fi requirements "udisksctl" "tar" rootfs "$storage_path" "$rootfs_tarball_path" ;; "kernel") if [ -z "$kernel_files_path" ] || [ -z "$medium" ] then usage exit 1 fi requirements "udisksctl" "rsync" kernel "$storage_path" "$kernel_files_path" "$medium" ;; *) usage exit 1 ;; esac } cros_medium_setup "$@"