[master 10/30] Add an fsinfo class.
mulkieran
installerbot-noreply at redhat.com
Thu Apr 16 20:41:24 UTC 2015
From: mulhern <amulhern at redhat.com>
Related: #12
Signed-off-by: mulhern <amulhern at redhat.com>
---
blivet/tasks/fsinfo.py | 128 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 128 insertions(+)
create mode 100644 blivet/tasks/fsinfo.py
diff --git a/blivet/tasks/fsinfo.py b/blivet/tasks/fsinfo.py
new file mode 100644
index 0000000..fbbca97
--- /dev/null
+++ b/blivet/tasks/fsinfo.py
@@ -0,0 +1,128 @@
+# fsinfo.py
+# Filesystem information gathering classes.
+#
+# Copyright (C) 2015 Red Hat, Inc.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions of
+# the GNU General Public License v.2, or (at your option) any later version.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY expressed or implied, including the implied warranties 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., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
+# source code or documentation are not subject to the GNU General Public
+# License and may only be used or replicated with the express permission of
+# Red Hat, Inc.
+#
+# Red Hat Author(s): Anne Mulhern <amulhern at redhat.com>
+
+import abc
+import os
+
+from six import add_metaclass
+
+from ..errors import FSError
+from .. import util
+
+from . import availability
+from . import task
+
+ at add_metaclass(abc.ABCMeta)
+class FSInfo(task.Task):
+ """ An abstract class that represents an information gathering app. """
+
+ description = "filesystem info"
+
+ app_name = abc.abstractproperty(
+ doc="The name of the filesystem information gathering application.")
+
+ options = abc.abstractproperty(
+ doc="Options for invoking the application.")
+
+ @classmethod
+ def _app(cls):
+ return availability.Application(availability.Path(), cls.app_name)
+
+ def __init__(self, an_fs):
+ """ Initializer.
+
+ :param FS an_fs: a filesystem object
+ """
+ self.fs = an_fs
+
+ @classmethod
+ def available(cls):
+ return cls._app().available
+
+ @property
+ def unavailable(self):
+ if not self._app().available:
+ return "application %s not available." % self._app()
+
+ return False
+
+ @property
+ def unready(self):
+ if not self.fs.exists:
+ return "filesystem has not been created"
+
+ if not os.path.exists(self.fs.device):
+ return "device does not exist"
+
+ return False
+
+ @property
+ def unable(self):
+ return False
+
+ @property
+ def _infoCommand(self):
+ """ Returns the command for reading filesystem information.
+
+ :returns: a list of appropriate options
+ :rtype: list of str
+ """
+ return [str(self._app())] + self.options + [self.fs.device]
+
+ def doTask(self):
+ """ Returns information from the command.
+
+ :returns: a string representing the output of the command
+ :rtype: str
+ :raises FSError: if info cannot be obtained
+ """
+ error_msg = self.impossible
+ if error_msg:
+ raise FSError(error_msg)
+ try:
+ (rc, out) = util.run_program_and_capture_output(self._infoCommand)
+ if rc:
+ error_msg = "failed to gather fs info: %s" % rc
+ except OSError as e:
+ error_msg = "failed to gather fs info: %s" % e
+ if error_msg:
+ raise FSError(error_msg)
+ return out
+
+class Ext2FSInfo(FSInfo):
+ app_name = "dumpe2fs"
+ options = ["-h"]
+
+class JFSInfo(FSInfo):
+ app_name = "jfs_tune"
+ options = ["-l"]
+
+class NTFSInfo(FSInfo):
+ app_name = "ntfsinfo"
+ options = ["-m"]
+
+class ReiserFSInfo(FSInfo):
+ app_name = "debugreiserfs"
+ options = []
+
+class XFSInfo(FSInfo):
+ app_name = "xfs_db"
+ options = ["-c", "sb 0", "-c", "p dblocks", "-c", "p blocksize"]
--
To view this commit on github, visit https://github.com/rhinstaller/blivet/commit/338a50c40baa99ad860444881a5dfab0d43fef74
More information about the anaconda-patches
mailing list