Handy utility scripts

utils.sh

## Handy utility scripts.

retry_with_timeout () {
  # Retries the given command until it returns the given value for the given number of times.
  # Usage retry_with_timeout 'Command to be executed with quotes' <expected value> <number of times to retry>
  local command_to_try="$1"
  local expected_value="$2"
  local expected_timeout="$3"
  local total_time=0

  until [[ $expected_value -eq `eval $command_to_try` ]]
  do
    if [[ 10#$total_time -gt 10#$expected_timeout ]]
    then
      echo "time-out $expected_timeout exceeded"
      return -1
    fi

    total_time=`expr $total_time + 1`
    sleep 1
  done

  echo "success"
  return 0
}

get_crtime() {
# Gets the create time of a given file.
    for target in "${@}"; do
        inode=$(stat -c '%i' "${target}")
        fs=$(df  --output=source "${target}"  | tail -1)
        crtime=$(sudo debugfs -R 'stat <'"${inode}"'>' "${fs}" 2>/dev/null | 
        grep -oP 'crtime.*--\s*\K.*')
        printf "%s\t%s\n" "${target}" "${crtime}"
    done
}