eb2bd80851
systemd supports a watchdog (via the WatchdogSec service file option) which will send the program a SIGABRT when the timer expires, however currently this causes offlineimap to be killed immediately. This patch registers SIGABRT and handles it in the same manner as SIGUSR2, so that the current synchronisation is completed before the program exits safely. This makes offlineimap more flexible and robust for persistent setups that make use of holdconnectionopen and autorefresh options. For example, it may be useful in assisting with the occasional situation where offlineimap may not return successfully after a suspend and resume. To make use of this, users could add the following to the [Service] section of their systemd offlineimap service file (restart every 5 minutes): Restart=on-watchdog WatchdogSec=300 Signed-off-by: Chris Smart <mail@csmart.io> Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
530 lines
21 KiB
Python
530 lines
21 KiB
Python
# OfflineIMAP initialization code
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# Copyright (C) 2002-2016 John Goerzen & contributors
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import os
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import sys
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import threading
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import signal
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import socket
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import logging
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import traceback
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import collections
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from optparse import OptionParser
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import offlineimap
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import offlineimap.virtual_imaplib2 as imaplib
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# Ensure that `ui` gets loaded before `threadutil` in order to
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# break the circular dependency between `threadutil` and `Curses`.
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from offlineimap.ui import UI_LIST, setglobalui, getglobalui
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from offlineimap import threadutil, accounts, folder, mbnames
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from offlineimap import globals as glob
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from offlineimap.CustomConfig import CustomConfigParser
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from offlineimap.utils import stacktrace
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from offlineimap.repository import Repository
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from offlineimap.folder.IMAP import MSGCOPY_NAMESPACE
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ACCOUNT_LIMITED_THREAD_NAME = 'MAX_ACCOUNTS'
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PYTHON_VERSION = sys.version.split(' ')[0]
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def syncitall(list_accounts, config):
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"""The target when in multithreading mode for running accounts threads."""
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threads = threadutil.accountThreads() # The collection of accounts threads.
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for accountname in list_accounts:
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# Start a new thread per account and store it in the collection.
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account = accounts.SyncableAccount(config, accountname)
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thread = threadutil.InstanceLimitedThread(
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ACCOUNT_LIMITED_THREAD_NAME,
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target = account.syncrunner,
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name = "Account sync %s"% accountname
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)
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thread.setDaemon(True)
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# The add() method expects a started thread.
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thread.start()
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threads.add(thread)
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# Wait for the threads to finish.
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threads.wait() # Blocks until all accounts are processed.
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class OfflineImap(object):
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"""The main class that encapsulates the high level use of OfflineImap.
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To invoke OfflineImap you would call it with::
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oi = OfflineImap()
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oi.run()
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"""
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def run(self):
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"""Parse the commandline and invoke everything"""
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# next line also sets self.config and self.ui
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options, args = self.__parse_cmd_options()
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if options.diagnostics:
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self.__serverdiagnostics(options)
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elif options.migrate_fmd5:
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self.__migratefmd5(options)
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elif options.mbnames_prune:
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mbnames.init(self.config, self.ui, options.dryrun)
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mbnames.prune(self.config.get("general", "accounts"))
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mbnames.write()
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elif options.deletefolder:
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return self.__deletefolder(options)
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else:
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return self.__sync(options)
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def __parse_cmd_options(self):
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parser = OptionParser(
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version=offlineimap.__version__,
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description="%s.\n\n%s"% (offlineimap.__copyright__,
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offlineimap.__license__)
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)
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parser.add_option("-V",
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action="store_true", dest="version",
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default=False,
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help="show full version infos")
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parser.add_option("--dry-run",
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action="store_true", dest="dryrun",
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default=False,
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help="dry run mode")
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parser.add_option("--info",
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action="store_true", dest="diagnostics",
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default=False,
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help="output information on the configured email repositories")
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parser.add_option("-1",
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action="store_true", dest="singlethreading",
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default=False,
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help="(the number one) disable all multithreading operations")
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parser.add_option("-P", dest="profiledir", metavar="DIR",
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help="sets OfflineIMAP into profile mode.")
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parser.add_option("-a", dest="accounts",
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metavar="account1[,account2[,...]]",
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help="list of accounts to sync")
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parser.add_option("-c", dest="configfile", metavar="FILE",
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default=None,
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help="specifies a configuration file to use")
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parser.add_option("-d", dest="debugtype",
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metavar="type1[,type2[,...]]",
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help="enables debugging for OfflineIMAP "
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" (types: imap, maildir, thread)")
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parser.add_option("-l", dest="logfile", metavar="FILE",
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help="log to FILE")
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parser.add_option("-s",
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action="store_true", dest="syslog",
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default=False,
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help="log to syslog")
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parser.add_option("-f", dest="folders",
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metavar="folder1[,folder2[,...]]",
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help="only sync the specified folders")
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parser.add_option("-k", dest="configoverride",
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action="append",
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metavar="[section:]option=value",
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help="override configuration file option")
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parser.add_option("-o",
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action="store_true", dest="runonce",
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default=False,
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help="run only once (ignore autorefresh)")
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parser.add_option("-q",
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action="store_true", dest="quick",
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default=False,
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help="run only quick synchronizations (don't update flags)")
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parser.add_option("-u", dest="interface",
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help="specifies an alternative user interface"
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" (quiet, basic, syslog, ttyui, blinkenlights, machineui)")
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parser.add_option("--delete-folder", dest="deletefolder",
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default=None,
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metavar="FOLDERNAME",
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help="Delete a folder (on the remote repository)")
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parser.add_option("--migrate-fmd5-using-nametrans",
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action="store_true", dest="migrate_fmd5", default=False,
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help="migrate FMD5 hashes from versions prior to 6.3.5")
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parser.add_option("--mbnames-prune",
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action="store_true", dest="mbnames_prune", default=False,
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help="remove mbnames entries for accounts not in accounts")
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(options, args) = parser.parse_args()
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glob.set_options(options)
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if options.version:
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print("offlineimap v%s, imaplib2 v%s (%s), Python v%s"% (
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offlineimap.__version__, imaplib.__version__, imaplib.DESC,
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PYTHON_VERSION)
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)
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sys.exit(0)
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# Read in configuration file.
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if not options.configfile:
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# Try XDG location, then fall back to ~/.offlineimaprc
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xdg_var = 'XDG_CONFIG_HOME'
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if not xdg_var in os.environ or not os.environ[xdg_var]:
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xdg_home = os.path.expanduser('~/.config')
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else:
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xdg_home = os.environ[xdg_var]
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options.configfile = os.path.join(xdg_home, "offlineimap", "config")
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if not os.path.exists(options.configfile):
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options.configfile = os.path.expanduser('~/.offlineimaprc')
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configfilename = options.configfile
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else:
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configfilename = os.path.expanduser(options.configfile)
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config = CustomConfigParser()
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if not os.path.exists(configfilename):
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# TODO, initialize and make use of chosen ui for logging
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logging.error(" *** Config file '%s' does not exist; aborting!"%
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configfilename)
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sys.exit(1)
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config.read(configfilename)
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# Profile mode chosen?
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if options.profiledir:
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if not options.singlethreading:
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# TODO, make use of chosen ui for logging
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logging.warn("Profile mode: Forcing to singlethreaded.")
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options.singlethreading = True
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if os.path.exists(options.profiledir):
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# TODO, make use of chosen ui for logging
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logging.warn("Profile mode: Directory '%s' already exists!"%
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options.profiledir)
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else:
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os.mkdir(options.profiledir)
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# TODO, make use of chosen ui for logging
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logging.warn("Profile mode: Potentially large data will be "
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"created in '%s'"% options.profiledir)
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# Override a config value.
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if options.configoverride:
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for option in options.configoverride:
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(key, value) = option.split('=', 1)
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if ':' in key:
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(secname, key) = key.split(':', 1)
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section = secname.replace("_", " ")
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else:
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section = "general"
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config.set(section, key, value)
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# Which ui to use? CLI option overrides config file.
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ui_type = config.getdefault('general', 'ui', 'ttyui')
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if options.interface != None:
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ui_type = options.interface
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if '.' in ui_type:
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# Transform Curses.Blinkenlights -> Blinkenlights.
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ui_type = ui_type.split('.')[-1]
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# TODO, make use of chosen ui for logging
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logging.warning('Using old interface name, consider using one '
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'of %s'% ', '.join(UI_LIST.keys()))
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if options.diagnostics:
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ui_type = 'ttyui' # Enforce this UI for --info.
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# dry-run? Set [general]dry-run=True.
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if options.dryrun:
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dryrun = config.set('general', 'dry-run', 'True')
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config.set_if_not_exists('general', 'dry-run', 'False')
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try:
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# Create the ui class.
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self.ui = UI_LIST[ui_type.lower()](config)
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except KeyError:
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logging.error("UI '%s' does not exist, choose one of: %s"%
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(ui_type, ', '.join(UI_LIST.keys())))
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sys.exit(1)
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setglobalui(self.ui)
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# Set up additional log files.
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if options.logfile:
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self.ui.setlogfile(options.logfile)
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# Set up syslog.
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if options.syslog:
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self.ui.setup_sysloghandler()
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# Welcome blurb.
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self.ui.init_banner()
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if options.debugtype:
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self.ui.logger.setLevel(logging.DEBUG)
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if options.debugtype.lower() == 'all':
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options.debugtype = 'imap,maildir,thread'
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# Force single threading?
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if not ('thread' in options.debugtype.split(',') \
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and not options.singlethreading):
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self.ui._msg("Debug mode: Forcing to singlethreaded.")
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options.singlethreading = True
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debugtypes = options.debugtype.split(',') + ['']
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for dtype in debugtypes:
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dtype = dtype.strip()
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self.ui.add_debug(dtype)
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if dtype.lower() == u'imap':
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imaplib.Debug = 5
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if options.runonce:
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# Must kill the possible default option.
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if config.has_option('DEFAULT', 'autorefresh'):
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config.remove_option('DEFAULT', 'autorefresh')
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# FIXME: spaghetti code alert!
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for section in accounts.getaccountlist(config):
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config.remove_option('Account ' + section, "autorefresh")
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if options.quick:
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for section in accounts.getaccountlist(config):
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config.set('Account ' + section, "quick", '-1')
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# Custom folder list specified?
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if options.folders:
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foldernames = options.folders.split(",")
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folderfilter = "lambda f: f in %s"% foldernames
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folderincludes = "[]"
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for accountname in accounts.getaccountlist(config):
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account_section = 'Account ' + accountname
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remote_repo_section = 'Repository ' + \
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config.get(account_section, 'remoterepository')
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config.set(remote_repo_section, "folderfilter", folderfilter)
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config.set(remote_repo_section, "folderincludes",
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folderincludes)
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if options.logfile:
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sys.stderr = self.ui.logfile
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socktimeout = config.getdefaultint("general", "socktimeout", 0)
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if socktimeout > 0:
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socket.setdefaulttimeout(socktimeout)
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threadutil.initInstanceLimit(
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ACCOUNT_LIMITED_THREAD_NAME,
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config.getdefaultint('general', 'maxsyncaccounts', 1)
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)
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for reposname in config.getsectionlist('Repository'):
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# Limit the number of threads. Limitation on usage is handled at the
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# imapserver level.
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for namespace in [accounts.FOLDER_NAMESPACE + reposname,
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MSGCOPY_NAMESPACE + reposname]:
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if options.singlethreading:
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threadutil.initInstanceLimit(namespace, 1)
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else:
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threadutil.initInstanceLimit(
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namespace,
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config.getdefaultint(
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'Repository ' + reposname,
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'maxconnections', 2)
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)
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self.config = config
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return (options, args)
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def __dumpstacks(self, context=1, sighandler_deep=2):
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""" Signal handler: dump a stack trace for each existing thread."""
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currentThreadId = threading.currentThread().ident
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def unique_count(l):
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d = collections.defaultdict(lambda: 0)
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for v in l:
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d[tuple(v)] += 1
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return list((k, v) for k, v in d.items())
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stack_displays = []
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for threadId, stack in sys._current_frames().items():
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stack_display = []
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for filename, lineno, name, line in traceback.extract_stack(stack):
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stack_display.append(' File: "%s", line %d, in %s'
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% (filename, lineno, name))
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if line:
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stack_display.append(" %s" % (line.strip()))
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if currentThreadId == threadId:
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stack_display = stack_display[:- (sighandler_deep * 2)]
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stack_display.append(' => Stopped to handle current signal. ')
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stack_displays.append(stack_display)
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stacks = unique_count(stack_displays)
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self.ui.debug('thread', "** Thread List:\n")
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for stack, times in stacks:
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if times == 1:
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msg = "%s Thread is at:\n%s\n"
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else:
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msg = "%s Threads are at:\n%s\n"
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self.ui.debug('thread', msg % (times, '\n'.join(stack[- (context * 2):])))
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self.ui.debug('thread', "Dumped a total of %d Threads." %
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len(sys._current_frames().keys()))
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def _get_activeaccounts(self, options):
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activeaccounts = []
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errormsg = None
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activeaccountnames = self.config.get("general", "accounts")
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if options.accounts:
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activeaccountnames = options.accounts
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activeaccountnames = [x.lstrip() for x in activeaccountnames.split(",")]
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allaccounts = accounts.getaccountlist(self.config)
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for accountname in activeaccountnames:
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if accountname in allaccounts:
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activeaccounts.append(accountname)
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else:
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errormsg = "Valid accounts are: %s"% (
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", ".join(allaccounts))
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self.ui.error("The account '%s' does not exist"% accountname)
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if len(activeaccounts) < 1:
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errormsg = "No accounts are defined!"
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if errormsg is not None:
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self.ui.terminate(1, errormsg=errormsg)
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return activeaccounts
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def __sync(self, options):
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"""Invoke the correct single/multithread syncing
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self.config is supposed to have been correctly initialized
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already."""
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def sig_handler(sig, frame):
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if sig == signal.SIGUSR1:
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# tell each account to stop sleeping
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accounts.Account.set_abort_event(self.config, 1)
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elif sig in (signal.SIGUSR2, signal.SIGABRT):
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# tell each account to stop looping
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getglobalui().warn("Terminating after this sync...")
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accounts.Account.set_abort_event(self.config, 2)
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elif sig in (signal.SIGTERM, signal.SIGINT, signal.SIGHUP):
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# tell each account to ABORT ASAP (ctrl-c)
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getglobalui().warn("Terminating NOW (this may "\
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"take a few seconds)...")
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accounts.Account.set_abort_event(self.config, 3)
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if 'thread' in self.ui.debuglist:
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self.__dumpstacks(5)
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# Abort after three Ctrl-C keystrokes
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self.num_sigterm += 1
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if self.num_sigterm >= 3:
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getglobalui().warn("Signaled thrice. Aborting!")
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sys.exit(1)
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elif sig == signal.SIGQUIT:
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stacktrace.dump(sys.stderr)
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os.abort()
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try:
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self.num_sigterm = 0
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signal.signal(signal.SIGHUP, sig_handler)
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signal.signal(signal.SIGUSR1, sig_handler)
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signal.signal(signal.SIGUSR2, sig_handler)
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signal.signal(signal.SIGABRT, sig_handler)
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signal.signal(signal.SIGTERM, sig_handler)
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signal.signal(signal.SIGINT, sig_handler)
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signal.signal(signal.SIGQUIT, sig_handler)
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# Various initializations that need to be performed:
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activeaccounts = self._get_activeaccounts(options)
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mbnames.init(self.config, self.ui, options.dryrun)
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if options.singlethreading:
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# Singlethreaded.
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self.__sync_singlethreaded(activeaccounts, options.profiledir)
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else:
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# Multithreaded.
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t = threadutil.ExitNotifyThread(
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target=syncitall,
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name='Sync Runner',
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args=(activeaccounts, self.config,)
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)
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# Special exit message for the monitor to stop looping.
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t.exit_message = threadutil.STOP_MONITOR
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t.start()
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threadutil.monitor()
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# All sync are done.
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mbnames.write()
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self.ui.terminate()
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return 0
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except (SystemExit):
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raise
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except Exception as e:
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self.ui.error(e)
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self.ui.terminate()
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return 1
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def __sync_singlethreaded(self, list_accounts, profiledir):
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"""Executed in singlethreaded mode only.
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:param accs: A list of accounts that should be synced
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"""
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for accountname in list_accounts:
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account = accounts.SyncableAccount(self.config, accountname)
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threading.currentThread().name = \
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|
"Account sync %s"% account.getname()
|
|
if not profiledir:
|
|
account.syncrunner()
|
|
# Profile mode.
|
|
else:
|
|
try:
|
|
import cProfile as profile
|
|
except ImportError:
|
|
import profile
|
|
prof = profile.Profile()
|
|
try:
|
|
prof = prof.runctx("account.syncrunner()", globals(), locals())
|
|
except SystemExit:
|
|
pass
|
|
from datetime import datetime
|
|
dt = datetime.now().strftime('%Y%m%d%H%M%S')
|
|
prof.dump_stats(os.path.join(
|
|
profiledir, "%s_%s.prof"% (dt, account.getname())))
|
|
|
|
def __serverdiagnostics(self, options):
|
|
self.ui.info(" imaplib2: %s (%s)"% (imaplib.__version__, imaplib.DESC))
|
|
for accountname in self._get_activeaccounts(options):
|
|
account = accounts.Account(self.config, accountname)
|
|
account.serverdiagnostics()
|
|
|
|
def __deletefolder(self, options):
|
|
list_accounts = self._get_activeaccounts(options)
|
|
if len(list_accounts) != 1:
|
|
self.ui.error("you must supply only one account with '-a'")
|
|
return 1
|
|
account = accounts.Account(self.config, list_accounts.pop())
|
|
return account.deletefolder(options.deletefolder)
|
|
|
|
def __migratefmd5(self, options):
|
|
for accountname in self._get_activeaccounts(options):
|
|
account = accounts.Account(self.config, accountname)
|
|
localrepo = Repository(account, 'local')
|
|
if localrepo.getfoldertype() != folder.Maildir.MaildirFolder:
|
|
continue
|
|
folders = localrepo.getfolders()
|
|
for f in folders:
|
|
f.migratefmd5(options.dryrun)
|