Script for automatic file system check and mount usb disk for raspberry pi raspbian

repeatedly_mount.py

"""
Please READ carefuly first and use at your OWN RISK!

This script is repeatedly try to mount EXT4 partition to given point.
Any other FS types are igored while writing this script. Works ONLY EXT4!
Before mounting, checks and corrects the file system errors. THIS MAY CAUSE LOSS OF DATA!

Append cronjob such as:

        15 *  * * *  /usr/bin/python /root/repeatedly_mount.py

Developen on: Python 2.7.13
"""
__author__ = 'Sencer Hamarat'
__license__ = "Creative Commons Attribution-ShareAlike 3.0 Unported License"
__version__ = "1.1"
__maintainer__ = "Sencer Hamarat"
__status__ = "Production"

import os
import sys

from time import sleep

partition = '/dev/sda1'
mount_point = '/media/Backup'

lock_file = '/tmp/repeatedly_mount.lock'

if os.path.isfile(lock_file):
    print('Already running...')
    sys.exit()
else:
    os.system('touch %s' % lock_file)

try:
    content = ''
    with open('/etc/mtab', 'r') as f:
        content = f.read()

    if partition not in content:
        # Make sure the partition is clean before trying to mount.
        os.system('fsck.ext4 -y %s' % partition)

    count = 0
    while mount_point not in content:
        if count > 0:
            print('Trying again...')
        else:
            print('Not mounted, trying to mount...')
        
        os.system('systemctl daemon-reload && systemctl restart local-fs.target')
        os.system('mount -a')
        count += 1
        sleep(1)

        with open('/etc/mtab', 'r') as f:
            content = f.read()

    print('SUCCESSFULY MOUNTED!')
except KeyboardInterrupt:
    pass

finally:
    os.unlink(lock_file)

sys.exit()