[master 11/30] Add an fsck task.
mulkieran
installerbot-noreply at redhat.com
Tue Apr 14 15:32:28 UTC 2015
From: mulhern <amulhern at redhat.com>
Related: #12
Signed-off-by: mulhern <amulhern at redhat.com>
---
blivet/tasks/fsck.py | 177 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 177 insertions(+)
create mode 100644 blivet/tasks/fsck.py
diff --git a/blivet/tasks/fsck.py b/blivet/tasks/fsck.py
new file mode 100644
index 0000000..4b13606
--- /dev/null
+++ b/blivet/tasks/fsck.py
@@ -0,0 +1,177 @@
+# fsck.py
+# Filesystem check functionality.
+#
+# 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 ..i18n import _, N_
+
+from ..errors import FSError
+from .. import util
+
+from . import availability
+from . import task
+
+_UNKNOWN_RC_MSG = N_("Unknown return code: %d")
+
+ at add_metaclass(abc.ABCMeta)
+class FSCK(task.Task):
+ """An abstract class that represents actions associated with
+ checking consistency of a filesystem.
+ """
+ description = "fsck"
+
+ app_name = abc.abstractproperty(
+ doc="The name of the filesystem labeling 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
+
+ # TASK methods
+
+ @classmethod
+ def available(cls):
+ return cls._app().available
+
+ @property
+ def unavailable(self):
+ if not self._app().available:
+ return "application %s is 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 %s does not exist" % self.fs.device.name
+
+ return False
+
+ @property
+ def unable(self):
+ return False
+
+ # IMPLEMENTATION methods
+
+ @abc.abstractmethod
+ def _errorMessage(self, rc):
+ """ Error message corresponding to rc.
+
+ :param int rc: the fsck program return code
+ :returns: an error message corresponding to the code, or None
+ :rtype: str or NoneType
+
+ A return value of None indicates no error.
+ """
+ raise NotImplementedError()
+
+ @property
+ def _fsckCommand(self):
+ """The command to check the filesystem.
+
+ :return: the command
+ :rtype: list of str
+ """
+ return [str(self._app())] + self.options + [self.fs.device]
+
+ def doTask(self):
+ """ Check the filesystem.
+
+ :raises FSError: on failure
+ """
+ error_msg = self.impossible
+ if error_msg:
+ raise FSError(error_msg)
+
+ try:
+ rc = util.run_program(self._fsckCommand)
+ except OSError as e:
+ raise FSError("filesystem check failed: %s" % e)
+
+ error_msg = self._errorMessage(rc)
+ if error_msg is not None:
+ hdr = _("%(type)s filesystem check failure on %(device)s: ") % \
+ {"type": self.fs.type, "device": self.fs.device}
+
+ raise FSError(hdr + error_msg)
+
+
+class DosFSCK(FSCK):
+ _fsckErrors = {1: N_("Recoverable errors have been detected or dosfsck has "
+ "discovered an internal inconsistency."),
+ 2: N_("Usage error.")}
+
+ app_name = "dosfsck"
+ options = ["-n"]
+
+ def _errorMessage(self, rc):
+ if rc < 1:
+ return None
+ try:
+ return _(self._fsckErrors[rc])
+ except KeyError:
+ return _UNKNOWN_RC_MSG % rc
+
+
+class Ext2FSCK(FSCK):
+ _fsckErrors = {4: N_("File system errors left uncorrected."),
+ 8: N_("Operational error."),
+ 16: N_("Usage or syntax error."),
+ 32: N_("e2fsck cancelled by user request."),
+ 128: N_("Shared library error.")}
+
+ app_name = "e2fsck"
+ options = ["-f", "-p", "-C", "0"]
+
+ def _errorMessage(self, rc):
+ msgs = (_(self._fsckErrors[c]) for c in self._fsckErrors.keys() if rc & c)
+ return "\n".join(msgs).strip() or None
+
+class HFSPlusFSCK(FSCK):
+ app_name = "fsck.hfsplus"
+ options = []
+
+ def _errorMessage(self, rc):
+ # pylint: disable=unused-argument
+ return None
+
+class NTFSFSCK(FSCK):
+ app_name = "ntfsresize"
+ options = ["-c"]
+
+ def _errorMessage(self, rc):
+ return _UNKNOWN_RC_MSG % (rc,) if rc != 0 else None
--
To view this commit on github, visit https://github.com/rhinstaller/blivet/commit/2475d2b19cc4aab5e92d68dd3edbbe4cdec53d34
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