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#!/usr/bin/env python -tt
#
# Copyright (c) 2007, Red Hat, Inc.
# Copyright (c) 2009, 2010, 2011 Intel, Inc.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; version 2 of the License
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
from wic.utils.oe.misc import exec_cmd
class DiskImage():
"""
A Disk backed by a file.
"""
def __init__(self, device, size):
self.size = size
self.device = device
self.created = False
def exists(self):
return os.path.exists(self.device)
def create(self):
if self.created:
return
# create sparse disk image
cmd = "truncate %s -s %s" % (self.device, self.size)
exec_cmd(cmd)
self.created = True
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