Attachment 5468 Details for Bug 27825

WIP: /etc/fstab, /etc/mtab, /proc/mounts parser

27825_fstab.py (text/plain), 2.11 KB, created by Philipp Hahn on 2013-09-25 08:57 CEST

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Creator: Philipp Hahn

Created: 2013-09-25 08:57 CEST

Size: 2.11 KB

patch

obsolete

>class MntEnt(object):
>	__slots__ = [
>			'mnt_fsname',
>			'mnt_dir',
>			'mnt_type',
>			'mnt_opts',
>			'mnt_freq',
>			'mnt_passno',
>	]
>
>	@classmethod
>	def from_string(cls, line):
>		data = line.split(' ')
>		mnt_fsname, mnt_dir, mnt_type, mnt_opts = [
>				cls._decode_octal(_) for _ in data[0:4]
>		]
>		mnt_freq, mnt_passno = [
>				int(_, 10) for _ in data[4:6]
>		]
>		return cls(mnt_fsname, mnt_dir, mnt_type, mnt_opts, mnt_freq, mnt_passno)
>
>	def __init__(self, mnt_fsname, mnt_dir, mnt_type, mnt_opts, mnt_freq=0, mnt_passno=0):
>		self.mnt_fsname = mnt_fsname
>		self.mnt_dir = mnt_dir
>		self.mnt_type = mnt_type
>		self.mnt_opts = mnt_opts
>		self.mnt_freq = mnt_freq
>		self.mnt_passno = mnt_passno
>
>	RE_DECODE_OCTAL = re.compile(r'\\([0-7]{3})')
>	@classmethod
>	def _decode_octal(cls, string):
>		r"""
>		>>> MntEnt._decode_octal(r'a\040b\011c\012d\134e')
>		'a b\tc\nd\\e'
>		"""
>		return cls.RE_DECODE_OCTAL.sub(
>				lambda match: chr(int(match.group(1), 8)),
>				string
>		)
>
>	RE_ENCODE_OCTAL = re.compile(r'[\t\n \\]')
>	@classmethod
>	def _encode_octal(cls, string):
>		r"""
>		>>> MntEnt._encode_octal('a b\tc\nd\\e')
>		'a\\040b\\011c\\012d\\134e'
>		"""
>		return cls.RE_ENCODE_OCTAL.sub(
>				lambda match: r'\%03o' % (ord(match.group()),),
>				string
>		)
>
>	def __str__(self):
>		return ' '.join((
>					self._encode_octal(self.mnt_fsname),
>					self._encode_octal(self.mnt_dir),
>					self._encode_octal(self.mnt_type),
>					self._encode_octal(self.mnt_opts),
>					'%d' % (self.mnt_freq,),
>					'%d' % (self.mnt_passno,),
>		))
>
>	def __repr__(self):
>		return '%s(%r, %r, %r, %r, mnt_freq=%d, mnt_passno=%d)' % (
>				self.__class__.__name__,
>				self.mnt_fsname,
>				self.mnt_dir,
>				self.mnt_type,
>				self.mnt_opts,
>				self.mnt_freq,
>				self.mnt_passno,
>		)
>
>
>class Mounts(list):
>	def __init__(self, filename='/proc/mounts'):
>		list.__init__(self)
>		for line in open(filename, 'rb'):
>			self.append(MntEnt.from_string(line))
>
>	def mounted_directories(self):
>		for mnt in self:
>			yield mnt.mnt_dir
>
>	def mount_source(self, mount_point):  # unused
>		for mnt in reversed(self):
>			if mnt.mnt_dir == mount_point:
>				return mnt.mnt_fsname
>		raise KeyError(mount_point)

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Attachments on bug 27825: 5468