Merge branch 'daemon'

* daemon:
  daemonization: make sure the firewall subproc sends to syslog too.
  Rearrange daemonization/syslog stuff and make it more resilient.
  run in background (daemon) and option

main.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 import sys, os, re
 import helpers, options, client, server, firewall, hostwatch
+import compat.ssubprocess as ssubprocess
 from helpers import *
 
 
@@ -46,8 +47,9 @@ def parse_ipport(s):
 
 optspec = """
 sshuttle [-l [ip:]port] [-r [username@]sshserver[:port]] <subnets...>
-sshuttle --firewall <port> <subnets...>
 sshuttle --server
+sshuttle --firewall <port> <subnets...>
+sshuttle --hostwatch
 --
 l,listen=  transproxy to this ip address and port number [127.0.0.1:0]
 H,auto-hosts scan for remote hostnames and update local /etc/hosts
@@ -58,6 +60,9 @@ x,exclude= exclude this subnet (can be used more than once)
 v,verbose  increase debug message verbosity
 e,ssh-cmd= the command to use to connect to the remote [ssh]
 seed-hosts= with -H, use these hostnames for initial scan (comma-separated)
+D,daemon   run in the background as a daemon
+syslog     send log messages to syslog (default if you use --daemon)
+pidfile=   pidfile name (only if using --daemon) [./sshuttle.pid]
 server     (internal use only)
 firewall   (internal use only)
 hostwatch  (internal use only)
@@ -65,6 +70,8 @@ hostwatch  (internal use only)
 o = options.Options('sshuttle', optspec)
 (opt, flags, extra) = o.parse(sys.argv[1:])
 
+if opt.daemon:
+    opt.syslog = 1
 helpers.verbose = opt.verbose
 
 try:
@@ -75,7 +82,7 @@ try:
     elif opt.firewall:
         if len(extra) != 1:
             o.fatal('exactly one argument expected')
-        sys.exit(firewall.main(int(extra[0])))
+        sys.exit(firewall.main(int(extra[0]), opt.syslog))
     elif opt.hostwatch:
         sys.exit(hostwatch.hw_main(extra))
     else:
@@ -104,7 +111,8 @@ try:
                              sh,
                              opt.auto_nets,
                              parse_subnets(includes),
-                             parse_subnets(excludes)))
+                             parse_subnets(excludes),
+                             opt.syslog, opt.daemon, opt.pidfile))
 except Fatal, e:
     log('fatal: %s\n' % e)
     sys.exit(99)