/usr/share/pyshared/DiskManager/Fstab/FstabHandler.py is in disk-manager 1.1.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# FstabHandler.py : High level class for managing fstab file
# Copyright (C) 2007 Mertens Florent <flomertens@gmail.com>
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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
#
import os
import time
import shutil
import logging
import threading
import ConfigParser
from gettext import gettext as _
from Fstabconfig import *
from FstabUtility import *
from Fstab import *
from FstabDialogs import *
from FstabError import *
from EventHandler import *
from Mounter import *
import FstabData
available_mode = ["real", "delay", "virtual"]
class FstabHandler(MntFile) :
''' FstabHandler(filename, [fd], [mode], [naming], [backend], [log], [parent]
[sanity_check]) -> new FstabHandler object\n
FstabHandler is the high level class of MntFile. It try to provide high level methods.
In particular, FstabHanler apply change automaticly, show a nice progress bar when
mounting/unmouting device, can check for unknow and duplicate entry, integreate a logger,
integrate an undo method... For now FstabHandler can only works with GTK, but
in the future, Widget class will be abstracted to be able to use other backends\n
Options are :
filename, fd, mode, naming, backend : MntFile options. See Fstab.
The only difference is that filaname is default to filename
log : If True, save an original version of filename, and allow to use savelog method.
Default to True.
parent : specify the parent widget. Default to None
sanity_check : if True, check for unknow and duplicate entry on creation.
Default to False.
external_change_watch : emit events on changes not due to this class
mode : this is probably the more powerfull option of FstabHandler.
There is currently 3 mode available :
real : the default mode. All changes are apply immediatly.
delay : changes are only apply when calling the apply_now()
methd, or when switching to the real mode.
virtual : all changes are only apply when calling
the apply_now() method. All not applied changes
are lost when switching to an other mode. '''
def __init__(self, filename = FSTAB, fd = None, mode = "real", naming = "auto", \
backend = "auto", log = True, parent = None, external_change_watch = False) :
self._parent = parent
# Create a bckup of filename :
bckup = "%s-%s-save" % (filename, PACKAGE)
if not os.path.isfile(bckup) :
shutil.copy(filename, bckup)
# Load filename
MntFile.__init__(self, filename, fd = fd, naming = naming, backend = backend)
# Move it to fstab, and complete with other available device
self._build_object()
# Create copy
self._current = self.copy()
self._current.fstab = self.fstab.copy()
self._original = self.fstab.copy()
self._lastsave = self.fstab.copy()
# Init log
self.logchanges = log
if not os.getuid() == 0 :
self.logchanges = False
self._initlog()
# Set mode
self.set_mode(mode)
# Create Mounter object
self._mounter = Mounter(self, parent = self._parent)
# Start Event Handler
self._event = EventHandler(self, external_change_watch)
def _build_object(self, fstab = None) :
logging.debug("Building FstabHandler...")
t = time.time()
if fstab :
self[:] = fstab
self.fstab = self.copy()
self.fstab[:] = self[:]
mtab = MntFile(MTAB, minimal = True)
for device in self.info.list("DEVICE", ignored = False) :
entries = [ mtab[k] for k in mtab.search(device, keys = ["DEVICE"]) ]
if entries :
for entry in entries :
path = entry["FSTAB_PATH"]
if path not in self.fstab.list("FSTAB_PATH") :
if entry["FSTAB_TYPE"] in ("fuse", "fuseblk") :
get_fuse_options(entry)
type = entry["FSTAB_TYPE"]
opt = entry["FSTAB_OPTION"].replace("rw", "defaults")
entry = self.add([device, path, type, opt])
logging.debug("-> Adding mounted device %s on %s" % (device, \
entry["FSTAB_PATH"]))
else :
if device not in self.fstab.list() :
entry = self.add([device])
logging.debug("-> Adding %s on %s" % (device, entry["FSTAB_PATH"]))
logging.debug("FstabHandler build in %s s", time.time() -t)
def _rebuild_object(self, fstab) :
logging.debug("Rebuilding FstabHandler...")
t = time.time()
new = fstab.copy()
new[:] = fstab[:]
for entry in self[:] :
if entry not in new :
if not entry in self.fstab or not entry["DEVICE"] in new.list() \
or (entry["FSTAB_PATH"] not in new.list("FSTAB_PATH") and \
entry.get_is_mounted()) :
logging.debug("-> Adding %s on %s" % (entry["DEVICE"], \
entry["FSTAB_PATH"]))
new.append(entry)
self[:] = new
self.fstab = fstab
self._check_duplicate(self)
logging.debug("FstabHandler rebuild in %s s", time.time() -t)
def _copy(self) :
new = self.fstab.copy()
new.fstab = new.copy()
new.fstab[:] = new[:]
for entry in self :
if entry not in new :
new.append(entry.copy())
new.current = self._current.copy()
new.current.fstab = self._current.fstab.copy()
return new
def _restore_copy(self, copy) :
self[:] = copy[:]
self.fstab = copy.fstab
self._current = copy.current
self._current.fstab = copy.current.fstab
def connect(self, event, fct, *kargs) :
''' x.connect(event, fct, *kargs) -> connect event to fct\n
When event is detected, the function fct will be called with optional
parameters kargs. Available events are for now :
- "external_fstab_changed" : emitted when filename is updated but not due to
this class.
- "external_mtab_changed" : emitted when MTAB is updated but not due to
this class.
- "external_changed" : emitted when one of the previous event is emitted
- "internal_changed" : emitted when this class do a changed
(mount/unmount/configure...)
- "configuration_changed" : emitted when one of the previous event is emitted
- "size_changed" : emitted when size of all mounted device changed significantly
- "any_changed" : emitted when one of the previous event is emitted '''
if hasattr(self._event, "on_%s" % event) :
logging.debug("Connecting event '%s' to %s%s" % (event, fct.__name__, kargs))
setattr(self._event, "%s_fct" % event, [fct, kargs])
setattr(self, "%s_fct" % event, [fct, kargs])
else :
raise UnknowEvent(self._event, event)
def shutdown(self) :
''' x.shutdown() -> Shutdown FstabHandler process and save log\n
It is important to call this function if you use the external change watch
to shutdown it gracefully.'''
logging.debug("Calling Shutdown...")
if self.lastsave_has_changed() :
self.savelog()
list_created_path("clean")
self._event.shutdown()
def set_mode(self, mode) :
''' x.set_mode(mode) -> set mode to mode\n
Be aware that when quiting a virtual mode, all Entry of x are recreated '''
if not mode in available_mode :
logging.warning("No FstabHanler mode named %s. Starting with 'real' mode" % mode)
self._mode = "real"
if hasattr(self, "_mode") :
self._previous_mode = self._mode
t = time.time()
logging.debug("Switching mode from %s to %s" % (self._mode, mode))
if self._mode == "virtual" and not mode == "virtual" and hasattr(self, "_real") :
logging.debug("Restoring state...")
self._restore_copy(self._real)
elif self._mode == "delay" and not mode == "delay" :
logging.debug("Exiting from delay mode. Applying changes...")
self.apply_now()
if not self._mode == "virtual" and mode == "virtual" :
self._real = self._copy()
logging.debug("Mode switched in %s s", time.time() -t)
else :
logging.debug("Starting in %s mode" % mode)
self._mode = mode
def set_previous_mode(self) :
''' x.set_previous_mode() -> set mode to it's previous value '''
if hasattr(self, "_previous_mode") :
self.set_mode(self._previous_mode)
def get_mode(self) :
''' x.get_mode() -> get the current mode '''
return self._mode
def get_configured(self) :
''' x.get_configured() -> get all device configured in filename '''
return [ k for k in self.fstab ]
def get_all(self) :
''' x.get_all() -> get all manageable devices '''
return [ k for k in self ]
def get_new(self) :
''' x.get_new() -> get all manageable devices non configures in filename '''
return [ k for k in self if k not in self.fstab ]
def get_duplicate(self, item) :
''' x.get_duplicate(item) -> get duplicate entry of item\n
item might be an entry or a device name.
if in duplicate, return a list of entry with the same dev, including iteself.
return ann empty list otherwise '''
if isinstance(item, Entry) :
dev = item["DEVICE"]
else :
dev = item
res = self.search(dev, keys = ["DEV", "DEVICE"])
if len(res) > 1 :
return [ self[k] for k in res ]
else :
return []
def _get_entry(self, item) :
if isinstance(item, Entry) :
return item
else :
return self[item]
def get_attribute(self, item, attribute) :
''' x.get_attribute(item, attribute) -> get the attribute of item\n
item can be a FSTAB_PATH or an entry '''
entry = self._get_entry(item)
if entry.has_key(attribute) :
return entry[attribute]
return "None"
def get_property(self, item, property) :
''' x.get_property(item, attribute) -> get a property of item\n
item can be a FSTAB_PATH or an entry
current available property are :
- is_system
- is_mounted
- size, free_size, availale_size, used_size '''
entry = self._get_entry(item)
if hasattr(entry, "get_" + property) :
return getattr(entry, "get_" + property)()
return None
def set(self, item, path=None, type=None, option=None, paso=None) :
''' x.set(item, [path], [type], [option], [paso]) -> set item path/type/option
and/or paso\n
item can be a FSTAB_PATH or an entry '''
entry = self._get_entry(item)
if path :
old_path = entry["FSTAB_PATH"]
entry["FSTAB_PATH"] = path
if type :
entry["FSTAB_TYPE"] = type
if option :
if option[0] == "+" :
entry.addopt(option[1:])
elif option[0] == "-" :
entry.removeopt(option[1:])
else :
entry.setopt(option)
if not paso == None :
entry["FSTAB_PASO"] = str(int(bool(paso)) + \
int(bool(paso) and not entry.get_is_system()))
self._apply()
def set_default_option(self, item) :
''' x.set_default_option(item) -> set item options to default\n
item can be a a FSTAB_PATH or an entry '''
entry = self._get_entry(item)
entry["FSTAB_OPTION"] = entry.defaultopt()
def mount(self, item) :
''' x.mount(item) -> mount item\n
item can be a FSTAB_PATH or an entry '''
entry = self._get_entry(item)
if entry.get_is_mounted() :
logging.debug("%s on %s already mounted" % (entry["DEVICE"], \
entry["FSTAB_PATH"]))
return 0
self._event.emit("internal_changed_prepare")
result = self._mounter.do(mount = [entry])
if not result[1] :
if not self._current == self or not self._current.fstab == self.fstab :
logging.debug("Detected changement.")
self.simple_apply()
else :
clean_path(entry["FSTAB_PATH"])
self._event.emit("internal_changed")
return max(result)
def umount(self, item) :
''' x.umount(item) -> unmount item\n
item can be a FSTAB_PATH or an entry '''
entry = self._get_entry(item)
if not entry.get_is_mounted() :
logging.debug("%s on %s already unmounted" % (entry["DEVICE"], \
entry["FSTAB_PATH"]))
return 0
self._event.emit("internal_changed_prepare")
result = self._mounter.do(umount = [entry])
if not result[0] :
self._check_duplicate([entry])
clean_path(entry["FSTAB_PATH"])
self._event.emit("internal_changed")
else :
self._event.emit("internal_changed_cancel")
return max(result)
def configure(self, item) :
''' x.configure(item) -> add item to filename and mount it\n
item can be a FSTAB_PATH or an entry '''
entry = self._get_entry(item)
if not entry in self.fstab :
self.fstab.append(entry)
self._apply()
def unconfigure(self, item) :
''' x.unconfigure(item) -> remove item from filename and ask user if
he want to unmount it\n
item can be a FSTAB_PATH or an entry '''
entry = self._get_entry(item)
if entry in self.fstab :
self.fstab.remove(entry)
self._apply()
self._check_duplicate([entry])
def _check_duplicate(self, entries) :
for entry in entries[:] :
if not entry.get_is_mounted() \
and len(self.search(entry["DEV"], keys = ["DEV"])) > 1 \
and not entry in self.fstab and entry in self :
self.remove(entry)
logging.debug("Removing unused duplicate : %s on %s" \
% (entry["DEVICE"], entry["FSTAB_PATH"]))
if entry in self._current :
self._current.remove(entry)
def _apply(self) :
# Exit if we are in virtual or delay mode
if self._mode == "virtual" or self._mode == "delay" :
logging.debug("Mode %s enable, can't apply now" % self._mode)
logging.debug("Expected changes :\n%s" % self._get_state())
return
# inhibit the watch so we don't trigger it while we apply the change
self._event.emit("internal_changed_prepare")
logging.debug("Applying changes")
# Detect changes via an ugly hack that track global & local change
change = change_tracker(self._current, self)
change2 = change_tracker(self._current.fstab, self.fstab)
for i in range(len(change)) :
[ change[i].append(k) for k in change2[i] if k not in change[i] ]
# Apply the change now
self.simple_apply()
# Create path if needed
self.fstab.make_all_path()
# Mount entry added and changed
to_mount = change[1]
logging.debug("-> Device to mount :\n-> |%s" % \
"\n-> |".join([ "%s on %s" % (k["DEVICE"], k["FSTAB_PATH"]) for k in to_mount ]))
# Unmount entry changed, and ask user for non duplicate disabled entry
to_umount = change[2]
disabled = change[3][:]
if disabled :
dial = dialog("warning", _("Unmounting disabled devices?"), \
[_("You disabled the following devices:"), _("Do you want to unmount them?")], \
[ "%s on %s" % (k["DEV"], k["FSTAB_PATH"]) for k in change[3] ], \
_("Unmount selected"), parent = self._parent)
if not dial[0] == gtk.RESPONSE_REJECT :
for i in dial[1][0] :
to_umount.append(change[3][i])
logging.debug("-> Device to umount :\n-> |%s" % \
"\n-> |".join([ "%s on %s" % (k["DEVICE"], k["FSTAB_PATH"]) for k in to_umount ]))
# Require reboot if some device couldn't be unmounted
if self._mounter.do(mount = to_mount, umount = to_umount)[0] :
dialog("warning", _("Reboot require"), \
_("In order to apply all your changes,\n"\
"you'll need to reboot your computer."), parent = self._parent)
# Remove duplicate that are no more needed
self._check_duplicate(to_umount)
# Delete uneeded path created here
clean_all_path()
# If state changed between the apply and here, do a simple_apply.
# This can be due to a FSTAB_PATH change during the mounting
if not self._current == self or not self._current.fstab == self.fstab :
logging.debug("Detected changement.")
self.simple_apply()
# Emit internal_changed event
self._event.emit("internal_changed")
def apply_now(self) :
''' x.apply_now() -> apply the changes now\n
should only be used in virtual or delay mode, since
all changes are automaticly apply in real mode '''
if self._current == self and self._current.fstab == self.fstab :
logging.debug("Nothing to apply")
return
mode = self._mode
self._mode = "real"
self._apply()
self._mode = mode
if self._mode == "virtual" :
self._real = self._copy()
def simple_apply(self) :
''' x.simple_apply() -> apply change without mounting/unmounting/emmtting event \n '''
logging.debug("Updating current situation:\n%s" % self._get_state())
# Apply the change now
MntFile.apply(self.fstab)
# Update current situtation
self._current = self.copy()
self._current.fstab = self.fstab.copy()
def _get_state(self, obj = None) :
if not obj :
obj = self
change1 = change_tracker(obj._current, obj)[0]
change2 = change_tracker(obj._current.fstab, obj.fstab)[0]
return "-> Global change :\n-> |%s\n-> Local change :\n-> |%s" % \
("\n-> |".join([ k.replace("\n","") for k in change1 ]), \
"\n-> |".join([ k.replace("\n","") for k in change2 ]))
def _initlog(self) :
if self.logchanges :
self._logconf = ConfigParser.RawConfigParser()
self._logconf.read(FSTAB_LOG)
if not self._logconf.has_section("Original") :
logging.debug("Creating original backup")
self._logconf.add_section("Original")
self._logconf.set("Original","log","Original configuration")
fstabfile = open(self.filename)
self._logconf.set("Original","fstab",fstabfile.read())
fstabfile.close()
self._logfile = open(FSTAB_LOG, "w")
self._logconf.write(self._logfile)
self._logfile.close()
def savelog(self, name = None) :
''' x.savelog(name) -> save log as name\n
name is default to the date of saving '''
if not name :
name = str(time.time())
if self.logchanges and self.lastsave_has_changed() :
logging.debug("Save log as %s", name)
self._logconf.add_section(name)
log = change_tracker(self._lastsave, self.fstab)[0]
self._logconf.set(name, "log", "\n".join(log).strip())
self._logconf.set(name, "fstab", self.fstab.write())
self._logfile = open(FSTAB_LOG, "w+")
self._logconf.write(self._logfile)
self._logfile.close()
self._lastsave = self.fstab.copy()
self._initlog()
def get_listlog(self) :
''' x.listlog() -> list all the current log recorded '''
return self._logconf.sections()
def get_logcommit(self, name) :
''' x.get_commit(name) -> get commit of log name '''
return self._logconf.get(name, "log")
def get_logfile(self, name) :
''' x.get_logfile(name) -> get file of log name '''
return self._logconf.get(name, "fstab")
def get_changes_current_from(self, name) :
''' x.get_changes_current_from(name) -> get log of change between name version -> current version '''
tmpfile = os.tmpfile()
tmpfile.write(self._logconf.get(name, "fstab"))
tmpfile.seek(0)
previous = MntFile(self.filename, tmpfile)
return change_tracker(previous, self.fstab)[0]
def get_changes_current_to(self, name) :
''' x.get_changes_current_to(name) -> get log of change between current version -> name version '''
tmpfile = os.tmpfile()
tmpfile.write(self._logconf.get(name, "fstab"))
tmpfile.seek(0)
previous = MntFile(self.filename, tmpfile)
return change_tracker(self.fstab, previous)[0]
def revert_to(self, name) :
''' x.revert_to(name) -> revert to version name '''
logging.debug("Revert version to %s", name)
tmpfile = os.tmpfile()
tmpfile.write(self._logconf.get(name, "fstab"))
tmpfile.seek(0)
self._rebuild_object(MntFile(self.filename, tmpfile))
self._apply()
def cleanlog(self) :
''' x.cleanlog() -> clean the log and save current filename as Original '''
self._logfile = open(FSTAB_LOG, "w")
self._logfile.close()
self._initlog()
def get_changes_current_to_original(self) :
return change_tracker(self.fstab, self._original)[0]
def undo(self) :
''' x.undo() -> undo all changes made since the creation of the object '''
self._rebuild_object(self._original.copy())
self._apply()
def original_has_changed(self) :
''' x.original_has_changed() -> return True if the original version at
the creation of the object has changed '''
return bool(not self.fstab == self._original)
def lastsave_has_changed(self) :
''' x.original_has_changed() -> return True if the version has changed since
last savelog '''
return bool(not self.fstab == self._lastsave)
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