# OfflineIMAP initialization code # Copyright (C) 2002-2015 John Goerzen & contributors # # 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA import os import sys import threading import offlineimap.imaplib2 as imaplib import signal import socket import logging from optparse import OptionParser import offlineimap from offlineimap import accounts, threadutil, folder from offlineimap import globals from offlineimap.ui import UI_LIST, setglobalui, getglobalui from offlineimap.CustomConfig import CustomConfigParser from offlineimap.utils import stacktrace from offlineimap.repository import Repository import traceback import collections ACCOUNT_LIMITED_THREAD_NAME = 'MAX_ACCOUNTS' def syncitall(list_accounts, config): """The target when in multithreading mode for running accounts threads.""" threads = threadutil.accountThreads() # The collection of accounts threads. for accountname in list_accounts: # Start a new thread per account and store it in the collection. account = accounts.SyncableAccount(config, accountname) thread = threadutil.InstanceLimitedThread( instancename = ACCOUNT_LIMITED_THREAD_NAME, target = account.syncrunner, name = "Account sync %s"% accountname ) thread.setDaemon(True) # The add() method expects a started thread. thread.start() threads.add(thread) # Wait for the threads to finish. threads.wait() # Blocks until all accounts are processed. class OfflineImap: """The main class that encapsulates the high level use of OfflineImap. To invoke OfflineImap you would call it with:: oi = OfflineImap() oi.run() """ def run(self): """Parse the commandline and invoke everything""" # next line also sets self.config and self.ui options, args = self.__parse_cmd_options() if options.diagnostics: self.__serverdiagnostics(options) elif options.migrate_fmd5: self.__migratefmd5(options) else: return self.__sync(options) def __parse_cmd_options(self): parser = OptionParser(version=offlineimap.__version__, description="%s.\n\n%s" % (offlineimap.__copyright__, offlineimap.__license__)) parser.add_option("--dry-run", action="store_true", dest="dryrun", default=False, help="dry run mode") parser.add_option("--info", action="store_true", dest="diagnostics", default=False, help="output information on the configured email repositories") parser.add_option("-1", action="store_true", dest="singlethreading", default=False, help="(the number one) disable all multithreading operations") parser.add_option("-P", dest="profiledir", metavar="DIR", help="sets OfflineIMAP into profile mode.") parser.add_option("-a", dest="accounts", metavar="account1[,account2[,...]]", help="list of accounts to sync") parser.add_option("-c", dest="configfile", metavar="FILE", default=None, help="specifies a configuration file to use") parser.add_option("-d", dest="debugtype", metavar="type1[,type2[,...]]", help="enables debugging for OfflineIMAP " " (types: imap, maildir, thread)") parser.add_option("-l", dest="logfile", metavar="FILE", help="log to FILE") parser.add_option("-s", action="store_true", dest="syslog", default=False, help="log to syslog") parser.add_option("-f", dest="folders", metavar="folder1[,folder2[,...]]", help="only sync the specified folders") parser.add_option("-k", dest="configoverride", action="append", metavar="[section:]option=value", help="override configuration file option") parser.add_option("-o", action="store_true", dest="runonce", default=False, help="run only once (ignore autorefresh)") parser.add_option("-q", action="store_true", dest="quick", default=False, help="run only quick synchronizations (don't update flags)") parser.add_option("-u", dest="interface", help="specifies an alternative user interface" " (quiet, basic, syslog, ttyui, blinkenlights, machineui)") parser.add_option("--migrate-fmd5-using-nametrans", action="store_true", dest="migrate_fmd5", default=False, help="migrate FMD5 hashes from versions prior to 6.3.5") (options, args) = parser.parse_args() globals.set_options (options) #read in configuration file if not options.configfile: # Try XDG location, then fall back to ~/.offlineimaprc xdg_var = 'XDG_CONFIG_HOME' if not xdg_var in os.environ or not os.environ[xdg_var]: xdg_home = os.path.expanduser('~/.config') else: xdg_home = os.environ[xdg_var] options.configfile = os.path.join(xdg_home, "offlineimap", "config") if not os.path.exists(options.configfile): options.configfile = os.path.expanduser('~/.offlineimaprc') configfilename = options.configfile else: configfilename = os.path.expanduser(options.configfile) config = CustomConfigParser() if not os.path.exists(configfilename): # TODO, initialize and make use of chosen ui for logging logging.error(" *** Config file '%s' does not exist; aborting!"% configfilename) sys.exit(1) config.read(configfilename) #profile mode chosen? if options.profiledir: if not options.singlethreading: # TODO, make use of chosen ui for logging logging.warn("Profile mode: Forcing to singlethreaded.") options.singlethreading = True if os.path.exists(options.profiledir): # TODO, make use of chosen ui for logging logging.warn("Profile mode: Directory '%s' already exists!"% options.profiledir) else: os.mkdir(options.profiledir) threadutil.ExitNotifyThread.set_profiledir(options.profiledir) # TODO, make use of chosen ui for logging logging.warn("Profile mode: Potentially large data will be " "created in '%s'"% options.profiledir) #override a config value if options.configoverride: for option in options.configoverride: (key, value) = option.split('=', 1) if ':' in key: (secname, key) = key.split(':', 1) section = secname.replace("_", " ") else: section = "general" config.set(section, key, value) #which ui to use? cmd line option overrides config file ui_type = config.getdefault('general', 'ui', 'ttyui') if options.interface != None: ui_type = options.interface if '.' in ui_type: #transform Curses.Blinkenlights -> Blinkenlights ui_type = ui_type.split('.')[-1] # TODO, make use of chosen ui for logging logging.warning('Using old interface name, consider using one ' 'of %s'% ', '.join(UI_LIST.keys())) if options.diagnostics: ui_type = 'basic' # enforce basic UI for --info # dry-run? Set [general]dry-run=True if options.dryrun: dryrun = config.set('general', 'dry-run', 'True') config.set_if_not_exists('general', 'dry-run', 'False') try: # create the ui class self.ui = UI_LIST[ui_type.lower()](config) except KeyError: logging.error("UI '%s' does not exist, choose one of: %s"% \ (ui_type, ', '.join(UI_LIST.keys()))) sys.exit(1) setglobalui(self.ui) #set up additional log files if options.logfile: self.ui.setlogfile(options.logfile) #set up syslog if options.syslog: self.ui.setup_sysloghandler() #welcome blurb self.ui.init_banner() if options.debugtype: self.ui.logger.setLevel(logging.DEBUG) if options.debugtype.lower() == 'all': options.debugtype = 'imap,maildir,thread' #force single threading? if not ('thread' in options.debugtype.split(',') \ and not options.singlethreading): self.ui._msg("Debug mode: Forcing to singlethreaded.") options.singlethreading = True debugtypes = options.debugtype.split(',') + [''] for dtype in debugtypes: dtype = dtype.strip() self.ui.add_debug(dtype) if dtype.lower() == u'imap': imaplib.Debug = 5 if options.runonce: # Must kill the possible default option if config.has_option('DEFAULT', 'autorefresh'): config.remove_option('DEFAULT', 'autorefresh') # FIXME: spaghetti code alert! for section in accounts.getaccountlist(config): config.remove_option('Account ' + section, "autorefresh") if options.quick: for section in accounts.getaccountlist(config): config.set('Account ' + section, "quick", '-1') #custom folder list specified? if options.folders: foldernames = options.folders.split(",") folderfilter = "lambda f: f in %s"% foldernames folderincludes = "[]" for accountname in accounts.getaccountlist(config): account_section = 'Account ' + accountname remote_repo_section = 'Repository ' + \ config.get(account_section, 'remoterepository') config.set(remote_repo_section, "folderfilter", folderfilter) config.set(remote_repo_section, "folderincludes", folderincludes) if options.logfile: sys.stderr = self.ui.logfile socktimeout = config.getdefaultint("general", "socktimeout", 0) if socktimeout > 0: socket.setdefaulttimeout(socktimeout) threadutil.initInstanceLimit( ACCOUNT_LIMITED_THREAD_NAME, config.getdefaultint('general', 'maxsyncaccounts', 1) ) for reposname in config.getsectionlist('Repository'): # XXX: We are likely lying around. If we must use at most n # connections for a remote IMAP server, why do we allow twice this # number? The max connections number is used by both the FOLDER_ and # the MSGCOPY_ prefixes! for instancename in ["FOLDER_" + reposname, "MSGCOPY_" + reposname]: if options.singlethreading: threadutil.initInstanceLimit(instancename, 1) else: threadutil.initInstanceLimit( instancename, config.getdefaultint( 'Repository ' + reposname, 'maxconnections', 2) ) self.config = config return (options, args) def __dumpstacks(self, context=1, sighandler_deep=2): """ Signal handler: dump a stack trace for each existing thread.""" currentThreadId = threading.currentThread().ident def unique_count(l): d = collections.defaultdict(lambda: 0) for v in l: d[tuple(v)] += 1 return list((k, v) for k, v in d.items()) stack_displays = [] for threadId, stack in sys._current_frames().items(): stack_display = [] for filename, lineno, name, line in traceback.extract_stack(stack): stack_display.append(' File: "%s", line %d, in %s' % (filename, lineno, name)) if line: stack_display.append(" %s" % (line.strip())) if currentThreadId == threadId: stack_display = stack_display[:- (sighandler_deep * 2)] stack_display.append(' => Stopped to handle current signal. ') stack_displays.append(stack_display) stacks = unique_count(stack_displays) self.ui.debug('thread', "** Thread List:\n") for stack, times in stacks: if times == 1: msg = "%s Thread is at:\n%s\n" else: msg = "%s Threads are at:\n%s\n" self.ui.debug('thread', msg % (times, '\n'.join(stack[- (context * 2):]))) self.ui.debug('thread', "Dumped a total of %d Threads." % len(sys._current_frames().keys())) def __sync(self, options): """Invoke the correct single/multithread syncing self.config is supposed to have been correctly initialized already.""" try: # Honor CLI --account option, only. # Accounts to sync are put into syncaccounts variable. activeaccounts = self.config.get("general", "accounts") if options.accounts: activeaccounts = options.accounts activeaccounts = activeaccounts.replace(" ", "") activeaccounts = activeaccounts.split(",") allaccounts = accounts.AccountHashGenerator(self.config) syncaccounts = [] for account in activeaccounts: if account not in allaccounts: if len(allaccounts) == 0: errormsg = "The account '%s' does not exist because no" \ " accounts are defined!"% account else: errormsg = "The account '%s' does not exist. Valid ac" \ "counts are: %s"% \ (account, ", ".join(allaccounts.keys())) self.ui.terminate(1, errormsg=errormsg) if account not in syncaccounts: syncaccounts.append(account) def sig_handler(sig, frame): if sig == signal.SIGUSR1: # tell each account to stop sleeping accounts.Account.set_abort_event(self.config, 1) elif sig == signal.SIGUSR2: # tell each account to stop looping getglobalui().warn("Terminating after this sync...") accounts.Account.set_abort_event(self.config, 2) elif sig in (signal.SIGTERM, signal.SIGINT, signal.SIGHUP): # tell each account to ABORT ASAP (ctrl-c) getglobalui().warn("Terminating NOW (this may "\ "take a few seconds)...") accounts.Account.set_abort_event(self.config, 3) if 'thread' in self.ui.debuglist: self.__dumpstacks(5) # Abort after three Ctrl-C keystrokes self.num_sigterm += 1 if self.num_sigterm >= 3: getglobalui().warn("Signaled thrice. Aborting!") sys.exit(1) elif sig == signal.SIGQUIT: stacktrace.dump(sys.stderr) os.abort() self.num_sigterm = 0 signal.signal(signal.SIGHUP, sig_handler) signal.signal(signal.SIGUSR1, sig_handler) signal.signal(signal.SIGUSR2, sig_handler) signal.signal(signal.SIGTERM, sig_handler) signal.signal(signal.SIGINT, sig_handler) signal.signal(signal.SIGQUIT, sig_handler) #various initializations that need to be performed: offlineimap.mbnames.init(self.config, syncaccounts) if options.singlethreading: #singlethreaded self.__sync_singlethreaded(syncaccounts) else: # multithreaded t = threadutil.ExitNotifyThread( target=syncitall, name='Sync Runner', args=(syncaccounts, self.config,) ) # Special exit message for the monitor to stop looping. t.exit_message = threadutil.STOP_MONITOR t.start() threadutil.monitor() if not options.dryrun: offlineimap.mbnames.write(True) self.ui.terminate() return 0 except (SystemExit): raise except Exception as e: self.ui.error(e) self.ui.terminate() return 1 def __sync_singlethreaded(self, accs): """Executed in singlethreaded mode only. :param accs: A list of accounts that should be synced """ for accountname in accs: account = accounts.SyncableAccount(self.config, accountname) threading.currentThread().name = "Account sync %s"% accountname account.syncrunner() def __serverdiagnostics(self, options): activeaccounts = self.config.get("general", "accounts") if options.accounts: activeaccounts = options.accounts activeaccounts = activeaccounts.split(",") allaccounts = accounts.AccountListGenerator(self.config) for account in allaccounts: if account.name not in activeaccounts: continue account.serverdiagnostics() def __migratefmd5(self, options): activeaccounts = self.config.get("general", "accounts") if options.accounts: activeaccounts = options.accounts activeaccounts = activeaccounts.replace(" ", "") activeaccounts = activeaccounts.split(",") allaccounts = accounts.AccountListGenerator(self.config) for account in allaccounts: if account.name not in activeaccounts: continue localrepo = Repository(account, 'local') if localrepo.getfoldertype() != folder.Maildir.MaildirFolder: continue folders = localrepo.getfolders() for f in folders: f.migratefmd5(options.dryrun)