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sdk-hwV1.3/target/allwinner/v851s3-fastboot_sl100_front/busybox-init-base-files/files/pseudo_init

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#!/bin/sh
MOUNT_ETC=0
MOUNT_OVERLAY=1
################################## functions ##################################
mkfs_jffs2() {
! [ -x /usr/sbin/mkfs.jffs2 ] \
&& ! [ -x /sbin/mkfs.jffs2 ] \
&& echo "Not Found /usr/sbin/mkfs.jffs2 or /sbin/mkfs.jffs2" \
&& return 1
# format to jffs2
local erase_block=$(/bin/cat /proc/mtd \
| /bin/grep "$(basename $1)" \
| /usr/bin/awk '{print $3}')
/bin/mkdir -p /tmp/jffs2.dir/tmp
mkfs.jffs2 -p -e 0x${erase_block} -d /tmp/jffs2.dir \
-o /tmp/jffs2.img >/dev/null || return 1
/bin/dd if=/tmp/jffs2.img of=$1 || return 1
/bin/rm -rf /tmp/jffs2.img /tmp/jffs2.dir
return 0
}
mkfs_ubifs() {
mkfs.ubifs -x lzo -y "$1"
}
mount_etc() {
local etc_update=0
# if enable ota, do update
[ -f /etc/init.d/rc.ota-upgrade ] \
&& source /etc/init.d/ota-upgrade
local root_dev="$(readlink /dev/by-name/rootfs)"
# if mount failed, format.
case "${root_dev}" in
/dev/mtdblock*)
/bin/mount -t jffs2 /dev/by-name/rootfs_data /etc \
&& [ -e /etc/etc_complete -a ! -e /etc/etc_need_update ] \
&& return
# /etc/etc_complete and /etc/etc_need_update both exist, that means we just need to update
[ -e /etc/etc_complete -a -e /etc/etc_need_update ] && /bin/echo "do etc update" && etc_update=1
/bin/umount /etc
[ x$etc_update = x"1" ] || {
# not update, format first
/bin/echo "Mount Failed: formating /dev/by-name/rootfs_data to jffs2 ..."
mkfs_jffs2 "/dev/by-name/rootfs_data" || return 1
}
mount -t jffs2 /dev/by-name/rootfs_data /mnt
;;
/dev/ubi*)
/bin/mount -t ubifs /dev/by-name/rootfs_data /etc \
&& [ -e /etc/etc_complete -a ! -e /etc/etc_need_update ] \
&& return
# /etc/etc_complete and /etc/etc_need_update both exist, that means we just need to update
[ -e /etc/etc_complete -a -e /etc/etc_need_update ] && /bin/echo "do etc update" && etc_update=1
/bin/umount /etc
[ x$etc_update = x"1" ] || {
# not update, format first
/bin/echo "Mount Failed: formating /dev/by-name/rootfs_data to ubifs ..."
mkfs_ubifs "/dev/by-name/rootfs_data" || return 1
}
/bin/mount -t ubifs /dev/by-name/rootfs_data /mnt
;;
*)
/usr/sbin/fsck.ext4 -y /dev/by-name/rootfs_data &>/dev/null
/bin/mount -t ext4 -o sync,data=journal /dev/by-name/rootfs_data /etc \
&& [ -e /etc/etc_complete -a ! -e /etc/etc_need_update ] \
&& return
# /etc/etc_complete and /etc/etc_need_update both exist, that means we just need to update
[ -e /etc/etc_complete -a -e /etc/etc_need_update ] && /bin/echo "do etc update" && etc_update=1
/bin/umount /etc
[ x$etc_update = x"1" ] || {
# not update, format first
/bin/echo "Mount Failed: formating /dev/by-name/rootfs_data to ext4 ..."
mkfs.ext4 -m 0 /dev/by-name/rootfs_data >/dev/null || return 1
}
/bin/mount -t ext4 -o sync,data=journal /dev/by-name/rootfs_data /mnt
;;
esac
mkdir -p /tmp/etc
/bin/cp -af /etc/* /tmp/etc/
# keep the wifi config
[ -e /mnt/wifi/wpa_supplicant.conf ] && {
/bin/echo "keep the wifi config"
/bin/cp /mnt/wifi/wpa_supplicant.conf /tmp/etc/wifi/
}
/bin/cp -af /tmp/etc/* /mnt/
rm -rf /tmp/etc
sync
[ ! -e /mnt/etc_complete ] && touch /mnt/etc_complete
[ -e /mnt/etc_need_update ] && /bin/echo "etc update done" && rm -f /mnt/etc_need_update
sync
/bin/mount -o move /mnt /etc
}
mount_usr(){
local extend_name=$(fw_printenv -n extend_partition)
if [ $extend_name == extendB ]; then
extend_name="extend_backup"
else
extend_name="extend"
fi
local extend_partition="/dev/by-name/${extend_name}"
[ -L ${extend_partition} ] ||
if [ ${extend_partition} == "/dev/by-name/extend" ]; then
[ -L /dev/by-name/extend_backup ] || return
else
[ -L /dev/by-name/extend ] || return
fi
/bin/mkdir -p /tmp/usr
/bin/mount ${extend_partition} /tmp/usr >/dev/null || {
if [ ${extend_partition} == "/dev/by-name/extend" ]; then
echo "****** 111 mount /dev/by-name/extend_backup /usr *******"
/bin/mount /dev/by-name/extend_backup /tmp/usr > /dev/null
return
else
echo "********** 222 mount /dev/by-name/extend /usr ********"
/bin/mount /dev/by-name/extend /tmp/usr > /dev/null
fi
}
echo "*******333 mount ${extend_partition} /usr ******"
! [ -d /tmp/usr/bin ] \
&& umount /tmp/usr \
&& rm -rf /tmp/usr \
&& return
/bin/mount -o move /tmp/usr /usr \
&& rm -rf /tmp/usr
}
rc_mount_filesystem()
{
local fs_src="$1"
local fs_mntpt="$2"
# mount filesystem
if [ -e "$fs_src" -a -d "$fs_mntpt" ]; then
[ -L "$fs_src" ] && fs_src=$(readlink "$fs_src")
case "$fs_src" in
/dev/mtdblock*)
mount -t jffs2 "$fs_src" "$fs_mntpt" 2>/dev/null
if [ "$?" -ne "0" ]; then
mkfs_jffs2 "$fs_src"
mount -t jffs2 "$fs_src" "$fs_mntpt" 2>/dev/null
fi
;;
/dev/ubi*)
mount -t ubifs "$fs_src" "$fs_mntpt" 2>/dev/null
if [ "$?" -ne "0" ]; then
mkfs_ubifs "$fs_src"
mount -t ubifs "$fs_src" "$fs_mntpt" 2>/dev/null
fi
;;
*)
/usr/sbin/fsck.ext4 -y "$fs_src" &>/dev/null
mount -t ext4 "$fs_src" "$fs_mntpt" 2>/dev/null
if [ "$?" -ne "0" ]; then
# linux < 3.18 not support metadata_csum, e2fsprogs version:1.46.4
grep "Linux version 3.*" /proc/version >> /dev/null
if [ $? -eq 0 ]; then
echo "linux < 3.18, mkfs.ext4 do not use metadata and journal checksum features."
mkfs.ext4 -m 0 -O ^metadata_csum "$fs_src" >/dev/null
else
mkfs.ext4 -m 0 "$fs_src" >/dev/null
fi
mount -t ext4 "$fs_src" "$fs_mntpt" 2>/dev/null
fi
;;
esac
# restore /mnt file contexts
if [ -f /sbin/restorecon ]; then
/sbin/restorecon -R /mnt
fi
fi
}
rc_mount()
{
rc_mount_filesystem "/dev/by-name/UDISK" "/mnt/UDISK"
# rc_mount_filesystem "/dev/by-name/user-res" "/mnt/user"
# enable hotplug
[ -x /sbin/mdev ] && {
[ -f /proc/sys/kernel/hotplug ] && echo /sbin/mdev > /proc/sys/kernel/hotplug
/sbin/mdev -s
}
}
mount_overlay() {
local root_dev="$(readlink /dev/by-name/rootfs)"
local mount_partition_dir
case "$1" in
UDISK)
mount_partition_dir="/mnt/UDISK"
;;
rootfs_data)
mount_partition_dir="/overlay"
;;
*)
echo "error: please choose rootfs_data or UDISK"
return 1
esac
case "${root_dev}" in
/dev/mtdblock*)
/bin/mount -t jffs2 /dev/by-name/$1 ${mount_partition_dir} || {
/bin/echo "Mount Failed: formating /dev/by-name/$1 to jffs2 ..."
mkfs_jffs2 "/dev/by-name/$1" || return 1
mount -t jffs2 /dev/by-name/$1 ${mount_partition_dir}
}
;;
/dev/ubi*)
/bin/mount -t ubifs /dev/by-name/$1 ${mount_partition_dir} || {
/bin/echo "Mount Failed: formating /dev/by-name/$1 to ubifs ..."
mkfs_ubifs "/dev/by-name/$1" || return 1
/bin/mount -t ubifs /dev/by-name/$1 ${mount_partition_dir}
}
;;
*)
/usr/sbin/fsck.ext4 -y /dev/by-name/$1 &>/dev/null
/bin/mount -t ext4 -o sync,data=journal /dev/by-name/$1 ${mount_partition_dir} || {
/bin/echo "Mount Failed: formating /dev/by-name/$1 to ext4 ..."
mkfs.ext4 -m 0 /dev/by-name/$1 >/dev/null || return 1
/bin/mount -t ext4 -o sync,data=journal /dev/by-name/$1 ${mount_partition_dir}
}
;;
esac
fgrep -sq overlay /proc/filesystems || {
/bin/echo "skip mount overlayfs as kernel not support"
return
}
# only for recovery,copy boot_partition(boot) wifi information to boot_partition(recovery)
local system=$(fw_printenv -n boot_partition)
if [ x"$system" = x"recovery" ]; then
[ -e /overlay/upper/etc/wifi/wpa_supplicant ] && {
cp -fpr /overlay/upper/etc/wifi/* /etc/wifi/
}
fi
#When /dev/root is readonly, such as squashfs or ext4 ro, we try to mount overlayfs.Otherwise, don't mount overlayfs
fgrep -sq '/dev/root / squashfs ro' /proc/mounts || fgrep -sq '/dev/root / ext4 ro' /proc/mounts || {
/bin/echo "skip mount overlayfs as now rootfs not squashfs or readonly ext4"
return
}
# First, try to mount without a workdir, for overlayfs v22 and before.
# If it fails, it means that we are probably using a v23 and
# later versions that require a workdir
# mount -n -t overlay overlayfs:/overlay -o rw,noatime,lowerdir=/,upperdir=/overlay /mnt || {
# mkdir -p /overlay/upper /overlay/workdir
# mount -n -t overlay overlayfs:/overlay -o rw,noatime,lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/workdir /mnt
# }
local overlay_need_workdir=1
# overlayfs in linux-3.4 and linux-3.10 is v22 and before, should mount without a workdir
fgrep -sq 'Linux version 3' /proc/version && overlay_need_workdir=0
local mount_overlay_dir="/overlay"
[ x"${mount_partition_dir}" = x"/mnt/UDISK" ] && {
mkdir -p /mnt/UDISK/overlay
mount_overlay_dir="/mnt/UDISK/overlay"
}
if [ x"$overlay_need_workdir" = x"0" ]; then
mount -n -t overlayfs overlayfs:${mount_overlay_dir} -o rw,noatime,lowerdir=/,upperdir=${mount_overlay_dir} /mnt
else
mkdir -p ${mount_overlay_dir}/upper ${mount_overlay_dir}/workdir
mount -n -t overlay overlayfs:${mount_overlay_dir} -o rw,noatime,lowerdir=/,upperdir=${mount_overlay_dir}/upper,workdir=${mount_overlay_dir}/workdir /mnt
fi
mount -n /proc -o noatime,move /mnt/proc
pivot_root /mnt /mnt/rom
mount -n /rom/dev -o noatime,move /dev
mount -n /rom/tmp -o noatime,move /tmp
mount -n /rom/sys -o noatime,move /sys
mount -n /rom$mount_partition_dir -o noatime,move $mount_partition_dir
fgrep -sq '/rom/usr' /proc/mounts && {
mount -n /rom/usr -o noatime,move /usr
if [ x"$overlay_need_workdir" = x"0" ]; then
mkdir -p $mount_overlay_dir/usr
mount -n -t overlayfs overlayfs:${mount_overlay_dir} -o rw,noatime,lowerdir=/usr,upperdir=${mount_overlay_dir}/usr /usr
else
mkdir -p ${mount_overlay_dir}/upper/usr ${mount_overlay_dir}/workdir/usr
mount -n -t overlay overlayfs:${mount_overlay_dir} -o rw,noatime,lowerdir=/usr,upperdir=${mount_overlay_dir}/upper/usr,workdir=${mount_overlay_dir}/workdir/usr /usr
fi
}
[ x"$1" = x"UDISK" ] && rm -rf /overlay
}
set_parts_by_name() {
# create by-name
local parts part
/bin/mkdir -p /dev/by-name
parts=$partitions
for part in $(/bin/echo ${parts} | /bin/sed 's/:/ /g')
do
[ ! -e /dev/${part#*@} ] && [ -x /sbin/mdev ] && mdev -s #for initramfs
/bin/ln -fs "/dev/${part#*@}" "/dev/by-name/${part%@*}"
done
}
etc_part=/dev/nande
/bin/mount -t proc /proc /proc
/bin/mount -t tmpfs tmpfs /tmp
/bin/mount -t sysfs sys /sys
fgrep -sq pstore /proc/filesystems && {
/bin/mount -t pstore pstore /sys/fs/pstore
}
#fw_setenv, fw_printenv need /var/lock
mkdir -p /var/lock
#common but slow
set_parts_by_name
mount_usr
[ x"$MOUNT_ETC" = x"1" ] && mount_etc
# [ x"$MOUNT_OVERLAY" = x"1" ] && mount_overlay rootfs_data #choose rootfs_data or UDISK
rc_mount
/APP/SL100FRONTPANEL &
exec /sbin/init
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