Squashed 'yocto-poky/' content from commit ea562de
git-subtree-dir: yocto-poky
git-subtree-split: ea562de57590c966cd5a75fda8defecd397e6436
diff --git a/scripts/lib/wic/utils/fs_related.py b/scripts/lib/wic/utils/fs_related.py
new file mode 100644
index 0000000..2e74461
--- /dev/null
+++ b/scripts/lib/wic/utils/fs_related.py
@@ -0,0 +1,84 @@
+#!/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 __future__ import with_statement
+import os
+import errno
+
+from wic.utils.oe.misc import exec_cmd
+
+def makedirs(dirname):
+ """A version of os.makedirs() that doesn't throw an
+ exception if the leaf directory already exists.
+ """
+ try:
+ os.makedirs(dirname)
+ except OSError, err:
+ if err.errno != errno.EEXIST:
+ raise
+
+class Disk:
+ """
+ Generic base object for a disk.
+ """
+ def __init__(self, size, device=None):
+ self._device = device
+ self._size = size
+
+ def create(self):
+ pass
+
+ def cleanup(self):
+ pass
+
+ def get_device(self):
+ return self._device
+ def set_device(self, path):
+ self._device = path
+ device = property(get_device, set_device)
+
+ def get_size(self):
+ return self._size
+ size = property(get_size)
+
+
+class DiskImage(Disk):
+ """
+ A Disk backed by a file.
+ """
+ def __init__(self, image_file, size):
+ Disk.__init__(self, size)
+ self.image_file = image_file
+
+ def exists(self):
+ return os.path.exists(self.image_file)
+
+ def create(self):
+ if self.device is not None:
+ return
+
+ blocks = self.size / 1024
+ if self.size - blocks * 1024:
+ blocks += 1
+
+ # create disk image
+ dd_cmd = "dd if=/dev/zero of=%s bs=1024 seek=%d count=1" % \
+ (self.image_file, blocks)
+ exec_cmd(dd_cmd)
+
+ self.device = self.image_file