backup

   1 #!/usr/bin/python
   2
   3 # call rsnapshot daily/weekly/monthly regularly
   4 # this should be called from cron very often (several times a day) to not miss
   5 # a cycle when the machine is powered down for extended times.
   6 #
   7 # Author: Martin Pitt <martin@piware.de>
   8 # License: Public Domain
   9
  10 import os, time, os.path, pwd, subprocess
  11
  12 user = pwd.getpwuid(os.getuid()).pw_name
  13 rsnapshot_basedir = '/var/backups/' + user
  14 rsnapshot_conffile = os.path.expanduser('~/.rsnapshotrc')
  15 verbose = True
  16
  17 def days_mod(path):
  18     '''Return the number of days since the last modification of path.'''
  19
  20     if os.path.exists(path):
  21         return (time.time() - os.stat(path).st_mtime)/86400.
  22     else:
  23         return time.time()/86400.
  24
  25 def rsnapshot(mode):
  26     argv = ['rsnapshot']
  27     if verbose:
  28         argv.append('-v')
  29     argv += ['-c', rsnapshot_conffile, mode]
  30     if verbose:
  31         print argv
  32     subprocess.call(argv)
  33
  34 # daily
  35 if days_mod(os.path.join(rsnapshot_basedir, 'daily.0')) >= 1:
  36     rsnapshot('daily')
  37 elif days_mod(os.path.join(rsnapshot_basedir, 'weekly.0')) >= 7:
  38     rsnapshot('weekly')
  39 elif days_mod(os.path.join(rsnapshot_basedir, 'monthly.0')) >= 30:
  40     rsnapshot('monthly')