mirror of
https://github.com/OpenVoiceOS/OpenVoiceOS
synced 2025-06-05 22:19:21 +02:00
Another try for dracut-ng
This commit is contained in:
j1nx
Submodule buildroot updated: 5385cac223...6c5d033914
@ -175,6 +175,7 @@ BR2_PACKAGE_ALSA_LIB_PYTHON=y
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BR2_PACKAGE_ALSA_PLUGINS=y
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BR2_PACKAGE_LIBSAMPLERATE=y
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BR2_PACKAGE_LIBSNDFILE=y
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BR2_PACKAGE_RNNOISE=y
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BR2_PACKAGE_LIBARCHIVE=y
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BR2_PACKAGE_LIBDEFLATE=y
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BR2_PACKAGE_LZO=y
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@ -0,0 +1,256 @@
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#!/bin/bash
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PATH=/sbin:/bin:/usr/sbin:/usr/bin
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MOUNT="/bin/mount"
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PREINIT=""
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INIT="/sbin/init"
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ROOT_ROINIT="/sbin/init"
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ROOT_MOUNT="/mnt"
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ROOT_RODEVICE=""
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ROOT_RWDEVICE=""
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ROOT_ROMOUNT="/media/rfs/ro"
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ROOT_RWMOUNT="/media/rfs/rw"
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ROOT_RWRESET="no"
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ROOT_ROFSTYPE=""
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ROOT_ROMOUNTOPTIONS="bind"
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ROOT_ROMOUNTOPTIONS_DEVICE="noatime,nodiratime"
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ROOT_RWFSTYPE=""
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ROOT_RWMOUNTOPTIONS="rw,noatime,mode=755 tmpfs"
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ROOT_RWMOUNTOPTIONS_DEVICE="rw,noatime,mode=755"
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early_setup() {
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mkdir -p /proc
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mkdir -p /sys
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$MOUNT -t proc proc /proc
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grep -w "/sys" /proc/mounts >/dev/null || $MOUNT -t sysfs sysfs /sys
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grep -w "/dev" /proc/mounts >/dev/null || $MOUNT -t devtmpfs none /dev
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}
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probe_fs() {
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# Determine if we need to probe any modules to support the filesystem
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if ! grep -w "$1" /proc/filesystems >/dev/null; then
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modprobe "$optarg" 2> /dev/null || \
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log "Could not load $optarg module"
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fi
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}
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read_args() {
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[ -z "${CMDLINE+x}" ] && CMDLINE=$(cat /proc/cmdline)
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for arg in $CMDLINE; do
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# Set optarg to option parameter, and '' if no parameter was
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# given
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optarg=$(expr "x$arg" : 'x[^=]*=\(.*\)' || echo '')
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case $arg in
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root=*)
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ROOT_RODEVICE=$optarg ;;
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rootfstype=*)
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ROOT_ROFSTYPE="$optarg"
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probe_fs "$optarg" ;;
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rootinit=*)
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ROOT_ROINIT=$optarg ;;
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rootoptions=*)
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ROOT_ROMOUNTOPTIONS_DEVICE="$optarg" ;;
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rootrw=*)
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ROOT_RWDEVICE=$optarg ;;
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rootrwfstype=*)
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ROOT_RWFSTYPE="$optarg"
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probe_fs "$optarg" ;;
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rootrwreset=*)
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ROOT_RWRESET=$optarg ;;
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rootrwoptions=*)
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ROOT_RWMOUNTOPTIONS_DEVICE="$optarg" ;;
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overlayfstype=*)
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modprobe "$optarg" 2> /dev/null || \
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log "Could not load $optarg module";;
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preinit=*)
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PREINIT=$optarg ;;
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init=*)
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INIT=$optarg ;;
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esac
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done
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}
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fatal() {
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echo "rorootfs-overlay: $1" > "$CONSOLE"
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echo > "$CONSOLE"
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exec sh
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}
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log() {
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echo "rorootfs-overlay: $1" > "$CONSOLE"
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}
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resolve_device() {
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local dev=$1
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if [ "$(echo $dev | cut -c1-5)" = "UUID=" ]; then
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local uuid=$(echo $dev | cut -c6-)
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new_dev="/dev/disk/by-uuid/$uuid"
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elif [ "$(echo $dev | cut -c1-9)" = "PARTUUID=" ]; then
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local partuuid=$(echo $dev | cut -c10-)
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new_dev="/dev/disk/by-partuuid/$partuuid"
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elif [ "$(echo $dev | cut -c1-10)" = "PARTLABEL=" ]; then
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local partlabel=$(echo $dev | cut -c11-)
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new_dev="/dev/disk/by-partlabel/$partlabel"
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elif [ "$(echo $dev | cut -c1-6)" = "LABEL=" ]; then
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local label=$(echo $dev | cut -c7-)
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new_dev="/dev/disk/by-label/$label"
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else
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new_dev="$dev"
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fi
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if [ "$new_dev" != "$dev" ] && [ ! -d /dev/disk ]; then
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fatal "$dev device naming is not supported without udev"
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fi
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echo "$new_dev"
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}
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wait_for_device() {
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local dev=$1
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# Skip for e.g. `rootrw=ubi0:overlay`
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echo "$dev" | grep -q ":" && return
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counter=0
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while [ ! -b "$dev" ]; do
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sleep .100
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counter=$((counter + 1))
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if [ $counter -ge 50 ]; then
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fatal "$dev is not availble"
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exit
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fi
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done
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}
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early_setup
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[ -z "${CONSOLE+x}" ] && CONSOLE="/dev/console"
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read_args
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mount_and_boot() {
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mkdir -p $ROOT_MOUNT $ROOT_ROMOUNT $ROOT_RWMOUNT
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# Build mount options for read only root file system.
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# If no read-only device was specified via kernel command line, use
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# current root file system via bind mount.
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ROOT_RODEVICE=$(resolve_device "$ROOT_RODEVICE")
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wait_for_device "${ROOT_RODEVICE}"
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ROOT_ROMOUNTPARAMS_BIND="-o ${ROOT_ROMOUNTOPTIONS} /"
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if [ -n "${ROOT_RODEVICE}" ]; then
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ROOT_ROMOUNTPARAMS="-o ${ROOT_ROMOUNTOPTIONS_DEVICE} $ROOT_RODEVICE"
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if [ -n "${ROOT_ROFSTYPE}" ]; then
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ROOT_ROMOUNTPARAMS="-t $ROOT_ROFSTYPE $ROOT_ROMOUNTPARAMS"
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fi
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else
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ROOT_ROMOUNTPARAMS="$ROOT_ROMOUNTPARAMS_BIND"
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fi
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# Mount root file system to new mount-point, if unsuccessful, try bind
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# mounting current root file system.
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# shellcheck disable=SC2086
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if ! $MOUNT $ROOT_ROMOUNTPARAMS "$ROOT_ROMOUNT" 2>/dev/null; then
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log "Could not mount $ROOT_RODEVICE, bind mounting..."
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if ! $MOUNT $ROOT_ROMOUNTPARAMS_BIND "$ROOT_ROMOUNT"; then
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fatal "Could not mount read-only rootfs"
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fi
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fi
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# Remounting root file system as read only.
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if ! $MOUNT -o remount,ro "$ROOT_ROMOUNT"; then
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fatal "Could not remount read-only rootfs as read only"
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fi
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# If future init is the same as current file, use $ROOT_ROINIT
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# Tries to avoid loop to infinity if init is set to current file via
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# kernel command line
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if cmp -s "$0" "$INIT"; then
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INIT="$ROOT_ROINIT"
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fi
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# Build mount options for read write root file system.
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# If a read-write device was specified via kernel command line, use
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# it, otherwise default to tmpfs.
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if [ -n "${ROOT_RWDEVICE}" ]; then
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ROOT_RWDEVICE=$(resolve_device "$ROOT_RWDEVICE")
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wait_for_device "${ROOT_RWDEVICE}"
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ROOT_RWMOUNTPARAMS="-o $ROOT_RWMOUNTOPTIONS_DEVICE $ROOT_RWDEVICE"
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if [ -n "${ROOT_RWFSTYPE}" ]; then
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ROOT_RWMOUNTPARAMS="-t $ROOT_RWFSTYPE $ROOT_RWMOUNTPARAMS"
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fi
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else
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ROOT_RWMOUNTPARAMS="-t tmpfs -o $ROOT_RWMOUNTOPTIONS"
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fi
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# Mount read-write file system into initram root file system
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# shellcheck disable=SC2086
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if ! $MOUNT $ROOT_RWMOUNTPARAMS $ROOT_RWMOUNT; then
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fatal "Could not mount read-write rootfs"
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fi
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# Reset read-write file system if specified
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if [ "yes" = "$ROOT_RWRESET" ] && [ -n "${ROOT_RWMOUNT}" ]; then
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rm -rf ${ROOT_RWMOUNT:?}/*
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fi
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# Determine which unification file system to use
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union_fs_type=""
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if grep -w "overlay" /proc/filesystems >/dev/null; then
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union_fs_type="overlay"
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elif grep -w "aufs" /proc/filesystems >/dev/null; then
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union_fs_type="aufs"
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else
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union_fs_type=""
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fi
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# Create/Mount overlay root file system
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case $union_fs_type in
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"overlay")
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mkdir -p $ROOT_RWMOUNT/upperdir $ROOT_RWMOUNT/work
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$MOUNT -t overlay overlay \
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-o "$(printf "%s%s%s" \
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"lowerdir=$ROOT_ROMOUNT," \
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"upperdir=$ROOT_RWMOUNT/upperdir," \
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"workdir=$ROOT_RWMOUNT/work")" \
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$ROOT_MOUNT
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;;
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"aufs")
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$MOUNT -t aufs i\
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-o "dirs=$ROOT_RWMOUNT=rw:$ROOT_ROMOUNT=ro" \
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aufs $ROOT_MOUNT
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;;
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"")
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fatal "No overlay filesystem type available"
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;;
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esac
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# Execute any preinit scripts
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if [ -x "${PREINIT}" ]; then
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${PREINIT}
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fi
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# Move read-only and read-write root file system into the overlay
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# file system
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mkdir -p $ROOT_MOUNT/$ROOT_ROMOUNT $ROOT_MOUNT/$ROOT_RWMOUNT
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$MOUNT -n --move $ROOT_ROMOUNT ${ROOT_MOUNT}/$ROOT_ROMOUNT
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$MOUNT -n --move $ROOT_RWMOUNT ${ROOT_MOUNT}/$ROOT_RWMOUNT
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$MOUNT -n --move /proc ${ROOT_MOUNT}/proc
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$MOUNT -n --move /sys ${ROOT_MOUNT}/sys
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$MOUNT -n --move /dev ${ROOT_MOUNT}/dev
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cd $ROOT_MOUNT
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# switch to actual init in the overlay root file system
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exec switch_root $ROOT_MOUNT "$INIT" ||
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fatal "Couldn't chroot, dropping to shell"
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}
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mount_and_boot
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@ -0,0 +1,66 @@
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#!/bin/bash
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# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
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# ex: ts=8 sw=4 sts=4 et filetype=sh
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check() {
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require_binaries busybox || return 1
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require_binaries cat || return 1
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require_binaries switch_root || return 1
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require_binaries cmp || return 1
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require_binaries expr || return 1
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require_binaries grep || return 1
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require_binaries mkdir || return 1
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require_binaries mount || return 1
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require_binaries modprobe || return 1
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require_binaries log || return 1
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return 0
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}
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depends() {
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return 0
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}
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installkernel() {
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return 0
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}
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install_busybox_links() {
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dir="${1}"
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linkname="${2}"
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(cd "${dracutsysrootdir?}${dir}" &&
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for x in *; do
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if [ "$(readlink "${x}")" = "${linkname}" ]; then
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ln -sf "${linkname}" "${initdir?}/${dir}/${x}"
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fi
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done
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)
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}
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install() {
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inst_multiple mount umount cat cmp grep mkdir expr chroot
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# Install busybox binary
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inst_multiple /bin/busybox
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if [ -e "${dracutsysrootdir?}/lib64" ]; then
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ln -sf lib "${initdir?}/lib64"
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ln -sf lib "${initdir?}/usr/lib64"
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fi
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if [ -e "${dracutsysrootdir?}/lib32" ]; then
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ln -sf lib "${initdir?}/lib32"
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ln -sf lib "${initdir?}/usr/lib32"
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fi
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install_busybox_links "/bin" "busybox"
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install_busybox_links "/sbin" "../bin/busybox"
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if [ ! -L "${dracutsysrootdir?}/bin" ]; then
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install_busybox_links "/usr/bin" "../../bin/busybox"
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install_busybox_links "/usr/sbin" "../../bin/busybox"
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fi
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# inst does not work for some reason. Use cp(1) instead.
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#inst "$moddir/init-readonly-rootfs-overlay-boot.sh" "/init"
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cp $moddir/init-readonly-rootfs-overlay-boot.sh $initdir/init
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}
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