dd.py -- A frontend for dd.

dd.py

#!/usr/bin/env python

"""
  dd.py
  dd.py provides a wrapper around the standard
  dd command. Provides status updates through
  the use of the -USR1 signal.

  Updated for Python 3 04/01/16

  Author: Ricky Hewitt <[email protected]>
  http://rickyhewitt.com

  License: GNU GPL v3 <http://www.gnu.org>
"""

import subprocess
import os
import time
import sys
import shutil

def main(*args, **kwargs):
    dd_bin = shutil.which("dd")
    ddargs = args[0]
    ddargs.insert(0, dd_bin)
    pipe = subprocess.Popen(ddargs, shell=False, executable=dd_bin)

    while(1):
      output = subprocess.call("kill -USR1 %s" % pipe.pid, shell=True)
      if pipe.poll() is None:
          time.sleep(1)
      else:
          return pipe.poll()

main([i for i in sys.argv[1:]])