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# -*- coding: utf-8 -*-
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# Copyright 2008-2017 Mir Calculate. http://www.calculate-linux.org
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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import os
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import re
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from calculate.lib.utils.tools import SingletonParam
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import files
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import device
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import xattr
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import errno
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from contextlib import contextmanager
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from files import process, makeDirectory
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from tools import traverse
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import tempfile
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_ = lambda x: x
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from calculate.lib.cl_lang import setLocalTranslate
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setLocalTranslate('cl_lib3', sys.modules[__name__])
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def isMount(dn):
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"""
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Возвращает путь примонтированного dn
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"""
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def find_names(old_dn):
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dn = os.path.abspath(old_dn)
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yield dn
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if dn.startswith('/dev'):
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info = device.udev.get_device_info(name=dn)
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if 'DM_VG_NAME' in info and 'DM_LV_NAME' in info:
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yield '/dev/mapper/{vg}-{lv}'.format(vg=info['DM_VG_NAME'],
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lv=info['DM_LV_NAME'])
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def get_overlay_mounts(line):
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mounts = line.split(' ')
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yield mounts[1]
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for dn in re.findall("(?:lowerdir=|upperdir=|workdir=)([^,]+)",
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mounts[3]):
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yield dn
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find_data = set(find_names(dn))
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ret = ""
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for line in files.readLinesFile('/etc/mtab'):
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if " overlay " not in line:
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if " " in line:
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mounts = set(line.split(' ')[:2])
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if mounts & find_data:
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ret = (mounts - find_data).pop()
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else:
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mounts = set(get_overlay_mounts(line))
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dest = line.split(' ')[1]
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if mounts & find_data:
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if dest in find_data:
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ret = "overlay"
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else:
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return dest
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return ret
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class MountHelperError(Exception):
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pass
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class MountHelperNotFound(MountHelperError):
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pass
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class MountHelper(object):
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"""Data reader for fstab"""
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data_file = '/etc/fstab'
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NAME, DIR, TYPE, OPTS, FREQ, PASSNO = range(0, 6)
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def __init__(self, data_file=None, devs=()):
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from device import getUUIDDict
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if data_file:
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self.data_file = data_file
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self.cache = []
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self.rotateCache = []
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self.dictUUID = getUUIDDict(devs=devs)
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self.rebuildCache()
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def _readdata(self):
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with open(self.data_file, 'r') as f:
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return f.read()
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def rebuildCache(self):
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"""Rebuild cache from fstab file"""
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def setlen(ar):
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return ar[:6] + [""] * (6 - len(ar))
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self.cache = \
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map(lambda x: setlen(map(lambda y: y.strip(), x.split())),
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filter(lambda x: x.strip() and not x.lstrip().startswith("#"),
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self._readdata().split('\n')))
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for data in self.cache:
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convertDev = lambda x: (os.path.realpath(x)
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if x.startswith('/') else x)
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data[0] = device.udev.get_device_info(
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name=convertDev(self.dictUUID.get(data[0], data[0]))
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).get('DEVNAME', data[0])
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data[1] = data[1] if data[2] != "swap" else "swap"
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self.rotateCache = zip(*self.cache)
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def getBy(self, what=DIR, where=NAME, _in=None, eq=None,
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contains=None, noteq=None, allentry=False):
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"""Get data from fstab"""
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if eq is not None:
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filterfunc = lambda x: x[where] == eq
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elif _in is not None:
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filterfunc = lambda x: x[where] in _in
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elif contains is not None:
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filterfunc = lambda x: contains in x[where]
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else:
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filterfunc = lambda x: x[where] != noteq
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res = map(lambda x: x[what], filter(filterfunc, self.cache))
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if allentry:
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return res
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else:
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return "" if not res else res[-1]
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def getFields(self, *fields):
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"""Get all data by specifie fields"""
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return zip(*reduce(lambda x, y: x + [self.rotateCache[y]], fields, []))
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def isReadonly(self, what=DIR, eq=None):
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for data in filter(lambda x: x[what] == eq, self.cache):
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opts = data[self.OPTS].split(',')
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if "ro" in opts:
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return True
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elif "rw" in opts:
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return False
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raise MountHelperNotFound(eq)
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def writable(self, dn):
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return not self.isReadonly(eq=dn)
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def readonly(self, dn):
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return self.isReadonly(eq=dn)
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def exists(self, dn):
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return self.isExists(eq=dn) or self.isExists(what=self.NAME, eq=dn)
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def isExists(self, what=DIR, eq=None, noteq=None):
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"""Field with condition exist in fstab"""
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if not eq is None:
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filterfunc = lambda x: x[what] == eq
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else:
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filterfunc = lambda x: x[what] != noteq
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return bool(filter(filterfunc, self.cache))
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class FStab(MountHelper):
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"""Data reader for fstab"""
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__metaclass__ = SingletonParam
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data_file = '/etc/fstab'
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class Mounts(MountHelper):
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"""Data reader for fstab"""
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data_file = '/etc/mtab'
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class DiskSpaceError(Exception):
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pass
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class DiskSpace(object):
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def __init__(self):
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self.df_cmd = files.getProgPath('/bin/df')
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def get_free(self, dev=None, dn=None):
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if dev:
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mp = isMount(dev)
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if not mp:
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raise DiskSpaceError(_("Device %s must be mounted") % dev)
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dn = dev
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p = files.process(self.df_cmd, dn, "-B1")
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if p.success():
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data = p.read().strip()
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lines = data.split('\n')
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if len(lines) >= 2:
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cols = filter(None, lines[1].split())
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if len(cols) == 6:
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return int(cols[3])
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raise DiskSpaceError(_("Wrong df output:\n%s") % data)
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else:
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raise DiskSpaceError(str(p.readerr()))
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def commonPath(*paths):
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"""Return common path from list of paths"""
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paths = map(lambda x: os.path.normpath(x).split('/'), paths)
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res = map(lambda x: x[0],
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filter(lambda x: filter(lambda y: x[0] == y, x[1:]), zip(*paths)))
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return "/".join(res)
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def childMounts(pathname):
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"""Get all mount points which contain path"""
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if pathname != "none":
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absPath = os.path.abspath(pathname)
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else:
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absPath = pathname
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mtabFile = '/etc/mtab'
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if not os.access(mtabFile, os.R_OK):
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return ""
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with open(mtabFile) as f:
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return reduce(lambda x, y: x + [y],
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filter(lambda x: commonPath(absPath, x[0]) == absPath or \
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commonPath(absPath, x[1]) == absPath,
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map(lambda x: [x[0], x[1]],
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map(lambda x: x.split(" "), f))),
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[])
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class MountError(Exception):
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pass
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def mount(source, target, fstype=None, options=None):
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params = [source, target]
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if options is not None:
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params.insert(0, "-o%s"%",".join(traverse([options])))
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if fstype is not None:
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params.insert(0, "-t%s"%fstype)
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p = process("/bin/mount", *params)
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if p.success():
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return True
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else:
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raise MountError(
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_("Failed to mount {source} to {target}").format(
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source=source,
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target=target) +
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_(":") + str(p.readerr()))
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def umount(target):
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p = process("/bin/umount", target)
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if p.success():
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return True
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else:
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raise MountError(
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_("Failed to umount {target}").format(
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target=target) +
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_(":") + str(p.readerr()))
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class BtrfsError(Exception):
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pass
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class Btrfs(object):
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"""
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Получение информации о btrfs
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"""
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check_path = "/run/calculate/mount"
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def __init__(self, block):
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self.block = block
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if not os.path.exists(block):
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raise BtrfsError(_("Device not found"))
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@contextmanager
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def mount(self):
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dn = None
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try:
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makeDirectory(self.check_path)
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dn = tempfile.mkdtemp(prefix="btrfscheck-", dir=self.check_path)
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mount(self.block, dn, "btrfs")
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yield dn
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except KeyboardInterrupt:
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raise
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except MountError as e:
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if "wrong fs type" in str(e):
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raise BtrfsError(_("{} is not btrfs").format(self.block))
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else:
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raise BtrfsError(str(e))
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finally:
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if dn:
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if os.path.ismount(dn):
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umount(dn)
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os.rmdir(dn)
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def get_compression(self, rel_dn):
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rel_dn = rel_dn.lstrip("/")
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with self.mount() as dn:
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try:
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full_dn = os.path.join(dn, rel_dn)
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if os.path.exists(full_dn):
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return xattr.get(full_dn, "btrfs.compression")
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else:
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return ""
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except IOError as e:
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if e.errno == errno.ENODATA:
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return ""
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raise BtrfsError(_("Failed to get btrfs compression"))
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@property
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def compression(self):
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return self.get_compression("")
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def set_compression(self, rel_dn, value):
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rel_dn = rel_dn.lstrip("/")
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with self.mount() as dn:
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try:
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full_dn = os.path.join(dn, rel_dn)
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if not os.path.exists(full_dn):
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makeDirectory(full_dn)
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return xattr.set(full_dn, "btrfs.compression", value)
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except IOError as e:
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if e.errno == errno.ENODATA:
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return ""
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raise BtrfsError(_("Failed to set btrfs compression"))
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@compression.setter
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def compression(self, value):
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self.set_compression("", value)
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