| #!/bin/sh |
| |
| mount_overlay() { |
| if ! mount overlay /etc -t overlay -o defaults,lowerdir=/etc,upperdir=/var/persist/etc,workdir=/var/persist/etc-work; then |
| mount overlay /etc -t overlay -o defaults,lowerdir=/etc:/var/persist/etc |
| fi |
| } |
| |
| recreate_overlay() { |
| # Attempt to re-create the overlay by moving out the overlay contents and |
| # copying them back to /etc, which would create them back in the overlay |
| cd / |
| if ! umount /etc; then |
| return |
| fi |
| rm -rf /var/persist/etc-save |
| mv /var/persist/etc /var/persist/etc-save |
| mkdir -p /var/persist/etc |
| mount_overlay |
| cp -rp /var/persist/etc-save/* /etc/ |
| rm -rf /var/persist/etc-save |
| } |
| |
| if ! mount ubi0:rwfs /var -t ubifs -o defaults; then |
| if ! mount ubi0:rwfs /var -t ubifs -o defaults,ro; then |
| mount tmpfs /var -t tmpfs -o defaults |
| fi |
| fi |
| |
| mkdir -p /var/persist/etc /var/persist/etc-work /var/persist/home/root |
| |
| rm -rf /var/persist/etc-work/* |
| # rm -rf specifically skips . and .. directories; pipe all output to null to avoid the error message |
| rm -rf /var/persist/etc-work/.* > /dev/null 2>&1 |
| |
| mount_overlay |
| |
| # Check if there are any issues accessing the files in /etc after mounting the |
| # overlay by doing an 'ls' command |
| error="/var/overlay-error" |
| recreate_overlay_done= |
| files=$(find /var/persist/etc -type f | sed 's#/var/persist/etc/##') |
| for i in $files; do |
| ls -i "/etc/$i" >/dev/null 2>${error}; |
| if [ -s ${error} ]; then |
| # We don't have a way to print this error to the journal, delete it |
| rm -f ${error} |
| if test -n "$recreate_overlay_done"; then |
| recreate_overlay |
| recreate_overlay_done="true" |
| fi |
| # Check file once more |
| ls -i "/etc/$i" >/dev/null 2>${error}; |
| if [ -s ${error} ]; then |
| # File still corrupted, delete it from the overlay |
| echo "Removing corrupted file from overlay: $i" |
| rm -f ${error} |
| rm -f "/var/persist/etc/$i" |
| fi |
| fi |
| done |
| |
| exec /lib/systemd/systemd |