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#!/usr/bin/python
# vim: set fileencoding=utf-8 ts=2 sw=2 expandtab :
import os,sys
from optparse import OptionParser,make_option
from time import sleep
from syslog import *
from pyinotify import *
__author__ = "Benedikt Böhm"
__copyright__ = "Copyright (c) 2007-2008 Benedikt Böhm <bb@xnull.de>"
__version__ = 0,2,1
OPTION_LIST = [
make_option(
"-c", dest = "config",
default = "/etc/inosync/default.py",
metavar = "FILE",
help = "load configuration from FILE"),
make_option(
"-d", dest = "daemonize",
action = "store_true",
default = False,
help = "daemonize %prog"),
make_option(
"-p", dest = "pretend",
action = "store_true",
default = False,
help = "do not actually call rsync"),
make_option(
"-v", dest = "verbose",
action = "store_true",
default = False,
help = "print debugging information"),
]
ALL_EVENTS = [
"IN_ACCESS",
"IN_ATTRIB",
"IN_CLOSE_WRITE",
"IN_CLOSE_NOWRITE",
"IN_CREATE",
"IN_DELETE",
"IN_DELETE_SELF",
"IN_MODIFY",
"IN_MOVED_FROM",
"IN_MOVED_TO",
"IN_OPEN"
]
DEFAULT_EVENTS = [
"IN_CLOSE_WRITE",
"IN_CREATE",
"IN_DELETE",
"IN_MOVED_FROM",
"IN_MOVED_TO"
]
class RsyncEvent(ProcessEvent):
pretend = None
dirty = True
def __init__(self, pretend=False):
self.pretend = pretend
def sync(self):
if not self.dirty:
return
args = [config.rsync, "-ltrp", "--delete"]
args.append("--bwlimit=%s" % config.rspeed)
if config.logfile:
args.append("--log-file=%s" % config.logfile)
if "excludes" in dir(config):
for exclude in config.excludes:
args.append("--exclude=%s" % exclude)
args.append(config.wpath)
args.append("%s")
cmd = " ".join(args)
for node in config.rnodes:
if self.pretend:
syslog("would execute `%s'" % (cmd % node))
else:
syslog(LOG_DEBUG, "executing %s" % (cmd % node))
proc = os.popen(cmd % node)
for line in proc:
syslog(LOG_DEBUG, "[rsync] %s" % line.strip())
self.dirty = False
def process_default(self, event):
syslog(LOG_DEBUG, "caught %s on %s" % \
(event.event_name, os.path.join(event.path, event.name)))
if not event.event_name in config.emask:
syslog(LOG_DEBUG, "ignoring %s on %s" % \
(event.event_name, os.path.join(event.path, event.name)))
return
self.dirty = True
def daemonize():
try:
pid = os.fork()
except OSError, e:
raise Exception, "%s [%d]" % (e.strerror, e.errno)
if (pid == 0):
os.setsid()
try:
pid = os.fork()
except OSError, e:
raise Exception, "%s [%d]" % (e.strerror, e.errno)
if (pid == 0):
os.chdir('/')
os.umask(0)
else:
os._exit(0)
else:
os._exit(0)
os.open("/dev/null", os.O_RDWR)
os.dup2(0, 1)
os.dup2(0, 2)
return 0
def load_config(filename):
if not os.path.isfile(filename):
raise RuntimeError, "configuration file does not exist: %s" % filename
configdir = os.path.dirname(filename)
configfile = os.path.basename(filename)
if configfile.endswith(".py"):
configfile = configfile[0:-3]
sys.path.append(configdir)
exec("import %s as __config__" % configfile)
sys.path.remove(configdir)
global config
config = __config__
if not "wpath" in dir(config):
raise RuntimeError, "no watch path given"
if not os.path.isdir(config.wpath):
raise RuntimeError, "watch path does not exist: %s" % config.wpath
if not os.path.isabs(config.wpath):
config.wpath = os.path.abspath(config.wpath)
if not "rnodes" in dir(config) or len(config.rnodes) < 1:
raise RuntimeError, "no remote nodes given"
if not "rspeed" in dir(config) or config.rspeed < 0:
config.rspeed = 0
if not "emask" in dir(config):
config.emask = DEFAULT_EVENTS
for event in config.emask:
if not event in ALL_EVENTS:
raise RuntimeError, "invalid inotify event: %s" % event
if not "edelay" in dir(config):
config.edelay = 10
if config.edelay < 1:
raise RuntimeError, "event delay needs to be greater than 1"
if not "logfile" in dir(config):
config.logfile = None
if not "rsync" in dir(config):
config.rsync = "/usr/bin/rsync"
if not os.path.isabs(config.rsync):
raise RuntimeError, "rsync path needs to be absolute"
if not os.path.isfile(config.rsync):
raise RuntimeError, "rsync binary does not exist: %s" % config.rsync
def main():
version = ".".join(map(str, __version__))
parser = OptionParser(option_list=OPTION_LIST,version="%prog " + version)
(options, args) = parser.parse_args()
if len(args) > 0:
parser.error("too many arguments")
logopt = LOG_PID|LOG_CONS
if not options.daemonize:
logopt |= LOG_PERROR
openlog("inosync", logopt, LOG_DAEMON)
if options.verbose:
setlogmask(LOG_UPTO(LOG_DEBUG))
else:
setlogmask(LOG_UPTO(LOG_INFO))
load_config(options.config)
if options.daemonize:
daemonize()
wm = WatchManager()
ev = RsyncEvent(options.pretend)
notifier = Notifier(wm, ev)
wds = wm.add_watch(config.wpath, EventsCodes.ALL_EVENTS,
rec = True, auto_add = True)
syslog(LOG_DEBUG, "starting initial synchronization on %s" % config.wpath)
ev.sync()
syslog(LOG_DEBUG, "initial synchronization on %s done" % config.wpath)
syslog("resuming normal operations on %s" % config.wpath)
while True:
try:
notifier.process_events()
if notifier.check_events(0):
notifier.read_events()
ev.sync()
sleep(config.edelay)
except KeyboardInterrupt:
notifier.stop()
break
sys.exit(0)
if __name__ == "__main__":
main()
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