340 lines
12 KiB
Bash
Executable File
340 lines
12 KiB
Bash
Executable File
#!/bin/sh /etc/rc.common
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START=03
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LOG_FILE="/tmp/mount-fix.log"
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start() {
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# Initialize log
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rm -f "$LOG_FILE" >/dev/null 2>&1
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touch "$LOG_FILE"
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# Redirect all output (stdout and stderr) to the log file
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exec >>"$LOG_FILE" 2>&1
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echo "Begin mount fix process to make a usable userspace."
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# Determine firmware scenario
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if mount | grep -q "/usrdata"; then
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echo "New firmware scenario detected (with /usrdata)."
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handle_new_firmware
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elif mount | grep -q "/overlay"; then
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echo "Old firmware scenario detected (with /overlay)."
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handle_old_firmware
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else
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echo "Error: Unable to detect firmware scenario. Neither /usrdata nor /overlay mounts found. Exiting."
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exit 1
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fi
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}
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handle_old_firmware() {
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# Redirect all output (stdout and stderr) to the log file
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exec >>"$LOG_FILE" 2>&1
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/bin/echo "Begin mount fix process to make a usable userspace"
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# Forcefully unmount /etc
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/bin/echo "Unmounting the tiny overlay at /etc"
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/bin/umount -lf /etc >/dev/null 2>&1
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# Remount root filesystem as read-write
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/bin/echo "Remounting / as read-write"
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/bin/mount -o remount,rw /
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# Check if /overlay/etc-upper/merged.done exists
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/bin/echo "First time this is ran the stuff you have been putting in the old overlay needs merged."
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/bin/echo "Looking for evidence that this has already happened..."
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if [ ! -f /overlay/etc-upper/merged.done ]; then
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/bin/echo "/overlay/etc-upper/merged.done not found, merging /overlay/etc-upper/* to /etc/"
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cp -rf /overlay/etc-upper/* /etc/
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/bin/touch /overlay/etc-upper/merged.done
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else
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/bin/echo "/overlay/etc-upper/merged.done found, skipping merge"
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fi
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# Unmount /overlay
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/bin/echo "Unmounting the no longer needed /overlay"
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/bin/umount /overlay
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# Check if /etc/opkg.conf has a line containing "option overlay_root /overlay" and remove it if it exists
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/bin/echo "Lets be sure your opkg config isn't using the old overlay"
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if grep -q "option overlay_root /overlay" /etc/opkg.conf; then
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/bin/echo "Removing 'option overlay_root /overlay' from /etc/opkg.conf"
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sed -i '/option overlay_root \/overlay/d' /etc/opkg.conf
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else
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/bin/echo "'option overlay_root /overlay' not found in /etc/opkg.conf, no changes made"
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fi
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# Ensure necessary directories exist for overlay and pivot_root
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/bin/echo "Creating new overlay system"
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if [ ! -d /data/rootfs ]; then
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mkdir -p /data/rootfs
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fi
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if [ ! -d /data/rootfs-workdir ]; then
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mkdir -p /data/rootfs-workdir
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fi
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if [ ! -d /rootfs ]; then
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mkdir -p /rootfs
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fi
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# Mount the new overlay filesystem
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/bin/mount -t overlay overlay -o lowerdir=/,upperdir=/data/rootfs,workdir=/data/rootfs-workdir /rootfs
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# Create the real_rootfs directory in the new root
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if [ ! -d /rootfs/real_rootfs ]; then
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mkdir -p /rootfs/real_rootfs
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fi
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# Pivot root to the new root
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/bin/echo "Pivoting Root / to /rootfs; Be back soon!!"
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/sbin/pivot_root /rootfs /rootfs/real_rootfs >/dev/null 2>&1
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# Move the mounted filesystems to the new locations
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/bin/mount --move /real_rootfs/sys /sys
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/bin/mount --move /real_rootfs/proc /proc
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/bin/mount --move /real_rootfs/tmp /tmp
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/bin/mount --move /real_rootfs/dev /dev
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/bin/mount --move /real_rootfs/firmware /firmware
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/bin/mount --move /real_rootfs/persist /persist
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/bin/mount --move /real_rootfs/cache /cache
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/bin/mount --move /real_rootfs/data /data
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# Synchronize between /etc/rc.d and /real_rootfs/etc/rc.d
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synchronize_rc_d "/etc/rc.d" "/real_rootfs/etc/rc.d"
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# Final logs and remount the original root as read-only
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/bin/echo "...and we're back! The original root now lives at /real_rootfs"
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/bin/echo "Lets mount it as read-only for now, If you need it just remount it as read-write"
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/bin/mount -o remount,ro /real_rootfs >/dev/null 2>&1
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/bin/echo "Overlay and pivot_root setup completed"
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}
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handle_new_firmware() {
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# Redirect all output (stdout and stderr) to the log file
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exec >>"$LOG_FILE" 2>&1
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/bin/echo "Begin mount fix process to make a usable userspace"
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# Forcefully unmount /etc
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/bin/echo "Unmounting the 2 mounts over /etc"
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/bin/umount -lf /etc >/dev/null 2>&1
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/bin/umount -lf /etc >/dev/null 2>&1
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# Remount root filesystem as read-write
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/bin/echo "Remounting / as read-write"
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/bin/mount -o remount,rw /
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# Begin layer merge checks
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# Layer 1 to 2
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# Check if /overlay/etc-upper/merged.done exists
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/bin/echo "First time this is ran the stuff you have been putting in the old overlay and /usrdata/etc needs merged."
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/bin/echo "Looking for evidence that this has already happened..."
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if [ ! -f /usrdata/overlay-work/etc-upper/merged.done ]; then
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/bin/echo "/usrdata/overlay-work/etc-upper/merged.done not found, merging /usrdata/overlay-work/etc-upper/* to /usrdata/etc/"
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cp -rf /usrdata/overlay-work/etc-upper/* /usrdata/etc/
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/bin/touch /usrdata/overlay-work/etc-upper/merged.done
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else
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/bin/echo "/usrdata/overlay-work/etc-upper/merged.done found, skipping merge"
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fi
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# Layer 2 to 3
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# Check if /usrdata/etc/merged.done exists
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/bin/echo "First time this is ran the stuff you have been putting in /usrdata/etc and /etc needs merged."
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/bin/echo "Looking for evidence that this has already happened..."
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if [ ! -f /usrdata/etc/merged.done ]; then
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/bin/echo "/usrdata/etc/merged.done not found, merging /usrdata/etc/* to /etc/"
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cp -rf /usrdata/etc/* /etc/
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/bin/touch /usrdata/etc/merged.done
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else
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/bin/echo "/usrdata/etc/merged.done found, skipping merge"
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fi
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# Check if /etc/opkg.conf has a line containing "option overlay_root /overlay" and remove it if it exists
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/bin/echo "Lets be sure your opkg config isn't using the old overlay"
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if grep -q "option overlay_root /overlay" /etc/opkg.conf; then
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/bin/echo "Removing 'option overlay_root /overlay' from /etc/opkg.conf"
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sed -i '/option overlay_root \/overlay/d' /etc/opkg.conf
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else
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/bin/echo "'option overlay_root /overlay' not found in /etc/opkg.conf, no changes made"
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fi
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# Ensure necessary directories exist for overlay and pivot_root
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/bin/echo "Creating new overlay system"
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if [ ! -d /usrdata/rootfs ]; then
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mkdir -p /usrata/rootfs
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fi
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if [ ! -d /usrdata/rootfs-workdir ]; then
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mkdir -p /usrdata/rootfs-workdir
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fi
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if [ ! -d /rootfs ]; then
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mkdir -p /rootfs
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fi
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# Mount the new overlay filesystem
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/bin/mount -t overlay overlay -o lowerdir=/,upperdir=/usrdata/rootfs,workdir=/usrdata/rootfs-workdir /rootfs
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# Create the real_rootfs directory in the new root
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if [ ! -d /rootfs/real_rootfs ]; then
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mkdir -p /rootfs/real_rootfs
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fi
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# Pivot root to the new root
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/bin/echo "Pivoting Root / to /rootfs; Be back soon!!"
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/sbin/pivot_root /rootfs /rootfs/real_rootfs >/dev/null 2>&1
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# Move the mounted filesystems to the new locations
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/bin/mount --move /real_rootfs/sys /sys
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/bin/mount --move /real_rootfs/proc /proc
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/bin/mount --move /real_rootfs/tmp /tmp
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/bin/mount --move /real_rootfs/dev /dev
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/bin/mount --move /real_rootfs/firmware /firmware
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/bin/mount --move /real_rootfs/usrdata /usrdata
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/bin/mount --move /real_rootfs/data /data
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/bin/mount --move /real_rootfs/cache /cache
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/bin/mount --move /real_rootfs/systemrw /systemrw
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/bin/mount --move /real_rootfs/persist /persist
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# Synchronize between /etc/rc.d and /real_rootfs/etc/rc.d
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synchronize_rc_d "/etc/rc.d" "/real_rootfs/etc/rc.d"
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# Synchronize between /etc/rc.d and /usrdata/etc/rc.d
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synchronize_rc_d "/etc/rc.d" "/usrdata/etc/rc.d"
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# Final logs and remount the original root as read-only
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/bin/echo "...and we're back! The original root now lives at /real_rootfs"
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/bin/echo "Lets mount it as read-only for now, If you need it just remount it as read-write"
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/bin/mount -o remount,ro /real_rootfs >/dev/null 2>&1
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/bin/echo "Overlay and pivot_root setup completed"
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}
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synchronize_rc_d() {
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local source_dir="$1"
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local target_dir="$2"
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/bin/echo "Synchronizing $source_dir with $target_dir"
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for link in "$source_dir"/*; do
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if [ -L "$link" ]; then
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link_name=$(basename "$link")
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if [ ! -e "$target_dir/$link_name" ]; then
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/bin/echo "Copying $link_name to $target_dir"
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cp -a "$link" "$target_dir/$link_name"
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fi
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fi
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done
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for link in "$target_dir"/*; do
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if [ -L "$link" ]; then
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link_name=$(basename "$link")
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if [ ! -e "$source_dir/$link_name" ]; then
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/bin/echo "Removing $link_name from $target_dir"
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rm "$target_dir/$link_name"
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fi
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fi
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done
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}
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stop() {
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# Initialize log
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rm -f "$LOG_FILE" >/dev/null 2>&1
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touch "$LOG_FILE"
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# Redirect all output (stdout and stderr) to the log file
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exec >>"$LOG_FILE" 2>&1
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# Check if /real_rootfs exists
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if [ ! -d "/real_rootfs" ]; then
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echo "Error: /real_rootfs does not exist. Cannot proceed with stop." >> "$LOG_FILE"
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return 1
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fi
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# Determine firmware version based on mounts
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if [ -d "/usrdata" ] && [ -d "/systemrw" ]; then
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echo "New firmware scenario detected (with /usrdata and /systemrw)." >> "$LOG_FILE"
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stop_handle_new_firmware
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else
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echo "Old firmware scenario detected (without /usrdata and /systemrw)." >> "$LOG_FILE"
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stop_handle_old_firmware
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fi
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}
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stop_handle_new_firmware() {
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# Redirect all output (stdout and stderr) to the log file
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exec >>"$LOG_FILE" 2>&1
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/bin/echo "Stopping and reverting overlay and pivot_root"
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# Remount the original root filesystem as read-write
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/bin/mount -o remount,rw /real_rootfs
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# Move the mounted filesystems back to the original locations
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/bin/mount --move /sys /real_rootfs/sys
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/bin/mount --move /proc /real_rootfs/proc
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/bin/mount --move /tmp /real_rootfs/tmp
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/bin/mount --move /dev /real_rootfs/dev
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/bin/mount --move /firmware /real_rootfs/firmware
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/bin/mount --move /usrdata /real_rootfs/usrdata
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/bin/mount --move /data /real_rootfs/data
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/bin/mount --move /cache /real_rootfs/cache
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/bin/mount --move /systemrw /real_rootfs/systemrw
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/bin/mount --move /persist /real_rootfs/persist
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# Pivot root back to the original root
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/sbin/pivot_root /real_rootfs /real_rootfs/rootfs
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/bin/echo "Reverted pivot_root"
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# Unmount /rootfs overlay
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/bin/umount -lf /rootfs >/dev/null 2>&1
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# Mount layer 2 /etc back
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/bin/mount -t ubifs -o rw,relatime,bulk_read,assert=read-only,ubi=2,vol=0 /dev/ubi2_0 /etc
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# Mount layer 3 /etc back
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/bin/mount -t overlay overlay -o lowerdir=/etc,upperdir=/usrdata/overlay-work/etc-upper,workdir=/usrdata/overlay-work/.etc-work /etc
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df -h
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echo -e "\e[31m / is read-write right now. Be careful\e[0m"
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echo -e "\e[31m Reboot or run mount -o remount,ro / \e[0m"
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}
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stop_handle_old_firmware() {
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# Redirect all output (stdout and stderr) to the log file
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exec >>"$LOG_FILE" 2>&1
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/bin/echo "Stopping and reverting overlay and pivot_root"
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# Remount the original root filesystem as read-write
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/bin/mount -o remount,rw /real_rootfs
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# Move the mounted filesystems back to the original locations
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/bin/mount --move /sys /real_rootfs/sys
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/bin/mount --move /proc /real_rootfs/proc
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/bin/mount --move /tmp /real_rootfs/tmp
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/bin/mount --move /dev /real_rootfs/dev
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/bin/mount --move /firmware /real_rootfs/firmware
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/bin/mount --move /persist /real_rootfs/persist
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/bin/mount --move /cache /real_rootfs/cache
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/bin/mount --move /data /real_rootfs/data
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# Pivot root back to the original root
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/sbin/pivot_root /real_rootfs /real_rootfs/rootfs
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/bin/echo "Reverted pivot_root"
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# Unmount /rootfs overlay
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/bin/umount -lf /rootfs >/dev/null 2>&1
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# Mount the location of etc-upper back
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mount -t ubifs /dev/ubi0_3 /overlay
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# Mount the old overlay filesystem back for etc
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/bin/mount -t overlay overlay -o lowerdir=/etc,upperdir=/overlay/etc-upper,workdir=/overlay/.etc-work /etc
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echo -e "\e[31m / is read-write right now. Be careful\e[0m"
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echo -e "\e[31m Reboot or run mount -o remount,ro / \e[0m"
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}
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}
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restart() {
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/bin/echo "This script should only be executed once at boot"
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/bin/echo "Use Stop to undo the pivot"
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/bin/echo "Use Start to put it back"
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}
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