#!/bin/sh

set -e

#files_to_backup="
#/user/bsa
#"


backup_and_zap() {
  #for i in $files_to_backup; do
  #  echo cp -pr $i /var/backup/$i
  #done
  echo "$i became read-only due to errors. Running zap."
  /bin/zap --i-really-mean-it
  # /bin/zap runs reboot
}

SLEEPTIME=120

# Default
debugubifs="/sys/kernel/debug/ubifs"
if [ -n "$1" ]; then
# override default
  debugubifs="$1"
fi


pattern="$debugubifs/ubi*_*/readonly"

while :; do
  for i in $pattern; do
    if [ "$i" = "$pattern" ]; then
      echo "Cannot find ubifs related files in sysfs" 1>&2
      exit 1
    fi
    value=''
    value="$(cat "$i")"
    if [ "$value" = 1 ]; then
      backup_and_zap $i
      exit 0
    fi
    if [ "$value" != 0 ]; then
      echo "$0: $i contains invalid value" 1>&2
      exit 1
    fi
  done
  sleep $SLEEPTIME
done