imgcreate/util.py

   1 #
   2 # util.py : Various utility methods
   3 #
   4 # Copyright 2010, Red Hat  Inc.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; version 2 of the License.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU Library General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 import subprocess
  20 import logging
  21
  22 def call(*popenargs, **kwargs):
  23     '''
  24         Calls subprocess.Popen() with the provided arguments.  All stdout and
  25         stderr output is sent to logging.debug().  The return value is the exit
  26         code of the command.
  27     '''
  28     p = subprocess.Popen(*popenargs, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, **kwargs)
  29     rc = p.wait()
  30
  31     # Log output using logging module
  32     while True:
  33         # FIXME choose a more appropriate buffer size
  34         buf = p.stdout.read(4096)
  35         if not buf:
  36             break
  37         logging.debug("%s", buf)
  38
  39     return rc