Checking that the folder was continuesly mounted while the long operation was being performed.

._README.md

Checking that the folder was continuesly mounted while the long operation was being performed.

Why?

I have external hard-drive where I store backups created by MacOS TimeMachine. This hard drive is connected by usb dock-station, which is not protected from power failure. I just wanted to be sure, that, first TimeMachine backup (which is quite a lengthy operation) was not interrapted.

Usage:

# assume that you already have ruby on your computer
# if no, go to https://rvm.io/

# clone this mini-project
git clone git@gist.github.com:91f53fc0aa7ef15c57ea0460be26b579.git folder_check
cd folder_check

# edit and run your checks
ruby run.rb

# run some long operation and go calmly about your business

# stop by Ctrl + C

# run check for time gaps (did the folder was contnuesly mounted?)
ruby check.rb

.gitignore

log.json

check.rb

require 'json'
require 'time'

last_idx = 0
prev_time = nil
File.open('./log.json', 'r').each_line.with_index do |line, idx|
  next if line.strip == ''
  
  parsed_line = JSON.parse(line)
  if parsed_line['status'] != 'ok'
    puts "#{idx}:  ERR: not_ok:   #{line}"
  end

  current_time = Time.parse(parsed_line['time'])

  if prev_time.nil?
    puts "#{idx}:  ERR: prev_time_is_nil:  #{line}" if last_idx != 0
  else
    if (current_time - prev_time).to_i > 9
      puts "#{idx}:  ERR: time-gap:  #{line}"
    end
  end

  prev_time = current_time
  last_idx = idx
end

puts "Processed #{last_idx} lines."

run.rb

require 'json'

def perform_check
  res = %x[ mount |grep '/dev/disk4s2 on /Volumes/Tosh6TbTimeMach' ]
  raise 'mount_point_not_exists!' if res == ''
  res = 'ok_found_mountpoint'
  # 1 / 0
end

def perform_check2
  `ls -l "/Volumes/Untitled 2"`.split("\n")[1].end_with?('001.mp4')
end

loop do
  msg = {
    time: Time.now
  }
  begin 
    msg[:check_payload] = perform_check
    msg[:check2_payload] = perform_check2
    msg[:status] = :ok
  rescue Exception => ex
    msg[:status] = :error
    msg[:ex_class] = ex.class.to_s
    msg[:ex_message] = ex.message
  end

  File.open('log.json', 'a'){ |f| f.puts msg.to_json }
  
  sleep 8
end