syslog handling: print tracebacks when logging failure objects

[hippotat.git] / hippotatd

diff --git a/hippotatd b/hippotatd
index e3e42fb18ee6790dfc8125206a720970c2316099..b08ce6673d9cd9373a7025a7908f0f3ef3fc0a97 100755 (executable)
--- a/hippotatd
+++ b/hippotatd
@@ -25,7 +25,7 @@
 #    the file AGPLv3+CAFv2.  If not, email Ian Jackson
 #    <ijackson@chiark.greenend.org.uk>.
 
-
+#@ import sys; sys.path.append('@PYBUILD_INSTALL_DIR@')
 from hippotatlib import *
 
 import os
@@ -38,7 +38,6 @@ import twisted.internet
 from twisted.web.server import NOT_DONE_YET
 
 import twisted.web.static
-import twisted.python.syslog
 
 import hippotatlib.ownsource
 from hippotatlib.ownsource import SourceShipmentPreparer
@@ -65,7 +64,7 @@ def route(packet, iface, saddr, daddr):
   elif daddr == c.vaddr or daddr not in c.vnetwork:
     lt('inbound')
     queue_inbound(ipif, packet)
-  elif daddr == c.relay:
+  elif daddr == c.vrelay:
     lt('discard relay')
     log_discard(packet, iface, saddr, daddr, 'relay')
   else:
@@ -297,7 +296,8 @@ def process_cfg(_opts, putative_servers, putative_clients):
 
   global c
   c = ConfigResults()
-  c.server = cfg.get('SERVER','server')
+  try: c.server = cfg.get('SERVER','server')
+  except NoOptionError: c.server = 'SERVER'
 
   cfg_process_common(c, c.server)
   cfg_process_saddrs(c, c.server)
@@ -320,12 +320,21 @@ def process_cfg(_opts, putative_servers, putative_clients):
       c.vrelay = search
       break
 
+  try: c.ifname = cfg.get(c.server, 'ifname_server', raw=True)
+  except NoOptionError: pass
+
   cfg_process_ipif(c,
                    [c.server, 'DEFAULT'],
                    (('local','vaddr'),
                     ('peer', 'vrelay'),
                     ('rnets','vnetwork')))
 
+  if opts.printconfig is not None:
+    try: val = cfg.get(c.server, opts.printconfig)
+    except NoOptionError: pass
+    else: print(val)
+    sys.exit(0)
+
 def catch_termination():
   def run_cleanups():
     for cleanup in cleanups:
@@ -341,7 +350,9 @@ def catch_termination():
     raise RuntimeError('did not die due to signal %s !' % name)
 
   for sig in (signal.SIGINT, signal.SIGTERM):
-    signal.signal(sig, partial(signal_handler, sig.name))
+    try: signame = sig.name
+    except AttributeError: signame = "signal %d" % sig
+    signal.signal(sig, partial(signal_handler, signame))
 
 def daemonise():
   global syslogfacility
@@ -354,6 +365,7 @@ def daemonise():
                    facility=facilnum,
                    logoption=syslog.LOG_PID)
     def emit(event):
+      if logevent_is_boringtwisted(event): return
       m = twisted.logger.formatEvent(event)
       #print(repr(event), m, file=org_stderr)
       level = event.get('log_level')
@@ -363,6 +375,10 @@ def daemonise():
       elif level == LogLevel.warn             : sl = syslog.LOG_WARNING
       else                                    : sl = syslog.LOG_INFO
       syslog.syslog(sl,m)
+      failure = event.get('log_failure')
+      if failure is not None:
+        for l in failure.getTraceback().split('\n'):
+          syslog.syslog(sl,l)
     glp = twisted.logger.globalLogPublisher
     glp.addObserver(emit)
     log_debug(DBG.INIT, 'starting to log to syslog')
@@ -372,6 +388,8 @@ def daemonise():
     daemonic_reactor = (twisted.internet.interfaces.IReactorDaemonize
                         .providedBy(reactor))
     if daemonic_reactor: reactor.beforeDaemonize()
+    if opts.pidfile is not None:
+      pidfile_h = open(opts.pidfile, 'w')
     rfd, wfd = os.pipe()
     childpid = os.fork()
     if childpid:
@@ -389,17 +407,16 @@ def daemonise():
     grandchildpid = os.fork()
     if grandchildpid:
       # we are the intermediate child
+      if opts.pidfile is not None:
+        print(grandchildpid, file=pidfile_h)
+        pidfile_h.close()
       os._exit(0)
 
-    mypid = os.getpid()
     if opts.pidfile is not None:
-      pfh = open(opts.pidfile, 'w')
-      print(mypid, file=pfh)
-      pfh.close()
-
+      pidfile_h.close()
+                                                                        
     logger = subprocess.Popen(['logger','-d',
-                               '-t','hippotat(stderr)',
-                               '--id=%d' % mypid,
+                               '-t','hippotat[%d](stderr)' % os.getpid(),
                                '-p',opts.syslogfacility + '.err'],
                               stdin=subprocess.PIPE,
                               stdout=subprocess.DEVNULL,
@@ -446,6 +463,12 @@ optparser.add_option('--syslog-facility',
                      default=None,
                      help='log to syslog, with specified facility')
 
+optparser.add_option('--print-config',
+                     nargs=1, type='string',action='store',
+                     metavar='OPTION', dest='printconfig',
+                     default=None,
+                     help='print one config option value and exit')
+
 common_startup(process_cfg)
 catch_termination()
 start_http()