major rework

- support config file
- support multiple hbd target hosts
- daemonize (almost) properly

hbc

@@ -1,48 +1,154 @@
 #!/usr/bin/env python
-# $Id: hbc,v 1.1 2005/07/14 19:28:59 andreas Exp $
-import sys, time, socket, os, signal
+# $Id: hbc,v 1.2 2005/07/15 14:25:06 andreas Exp $
+import sys, time, socket, os, signal, getopt, string
 
-ADDR="204.29.161.33"
-#ADDR="10.99.1.4"
 PORT=50003
 INTERVAL=20
 
+
 def handler(signum, frame):
 	global up
-	if signum == 1:
-		os.execv("/usr/bin/env", ["python", sys.argv[0],"relaunch"])
 	if up == 0:
 		return
 	sys.exit(0)
-iam=socket.gethostname()
-sock=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-msg="interval=%s;name=%s" % (INTERVAL, iam)
 
-if len(sys.argv) <= 1 or sys.argv[1] != "relaunch":
-	msgboot="boot=1;interval=%s;name=%s" % (INTERVAL, iam)
-	while 1:
+helpflag=0
+verbose=0
+daemon=0
+optlist=[]  
+args=[]
+msgboot=[]
+home=os.environ['HOME']
+configfile="%s/.hbrc" % home
+
 try:
-			sock.sendto(msgboot, (ADDR, PORT))
-			break
+    optlist, args = getopt.getopt(sys.argv[1:], 'bc:dhm:v')
 except:
-			time.sleep(10)
+    helpflag=1
 
+for o,a in optlist:
+	if o == '-b':
+		msgboot.append("boot=1")
+	elif o == '-c':
+		configfile=a
+	elif o == '-d':
+		daemon=1
+	elif o == '-h':
+		helpflag=1
+	elif o == '-m':
+		msgboot.append("service=%s" % "service")
+		msgboot.append("msg=%s" % a)
+	elif o == '-v':
+		verbose+=1
+
+
+if helpflag:
+	print "hbc HeartBeatClient"
+	print "usage: hbc [-bdhv] [-c configfile] [-m msg][host1 [..]]"
+	print
+	print """ config file can contain 
+hb_hosts=('host1', 'host2', ..._
+hb_port=50003
+interval=20
+"""
+
+	sys.exit(1)
+
+#
+# set defaults
+
+hb_port=PORT
+interval=INTERVAL
+hb_hosts=[]
+
+try:
+	f=open(configfile,"r")	
+	if verbose: print "notice: using config file %s" % configfile
+except:
+	print "warning: running without conifig file: %s" % configfile
+	f=None
+
+if f:
+	while 1:
+		l=f.readline()
+		if len(l) == 0:
+			break
+		r=l[:-1].split('=')
+		if r[0] == 'hb_hosts':
+			hb_hosts=eval(r[1])
+		elif r[0] == 'interval':
+			interval=eval(r[1])
+		elif r[0] == 'hb_port':
+			hb_port=eval(r[1])
+	f.close()
+
+if len(args) != 0:
+	hb_hosts=args
+
+if len(hb_hosts) == 0:
+	print "no hb server specified"
+	sys.exit(1)
+
+
+sock=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+iam=socket.gethostname()
+
+if verbose:
+	print "notice: hb_hosts: %s" % str(hb_hosts)
+	print "notice: hb_port: %s" % hb_port
+	print "notice: interval: %s" % interval
+	print "notice: iam: %s" % iam
+
+if daemon:
+	msgboot.append("interval=%s" % interval)
+
+if len(msgboot) > 0:
+	msgboot.append("name=%s" % iam)
+	msg=string.join(msgboot,";")
+	while 1:
+		fail=0
+		for hb_host in hb_hosts:
+			try:
+				if verbose: print "sock.send('%s', (%s, %s))" % (msg, hb_host, hb_port)
+				sock.sendto(msg, (hb_host, hb_port))
+			except:
+				fail=1
+		if fail:
+			time.sleep(10)
+		else:
+			break
+	
+
+if not daemon:
+	sys.exit(0)
+
+pid=os.fork()
+if pid > 0:
+	if verbose:
+		print "daemoinizing... pid=%d" % pid
+	sys.exit(0)
+
+msg="interval=%s;name=%s" % (interval, iam)
 up=1
 signal.signal(signal.SIGTERM, handler)
 signal.signal(signal.SIGHUP, handler)
 
 while up:
 	try:
-		time.sleep(10)
+		time.sleep(interval)
 	except:
 		break
+	for hb_host in hb_hosts:
 		try:
-		sock.sendto(msg, (ADDR, PORT))
+			if verbose: print "sock.send('%s', (%s, %s))" % (msg, hb_host, hb_port)
+			sock.sendto(msg, (hb_host, hb_port))
 		except:
 			pass
 
 up=0
 msg="shutdown=1;name=%s" % (iam)
-sock.sendto(msg, (ADDR, PORT))
+for hb_host in hb_hosts:
+	if verbose: print "sock.send('%s', (%s, %s))" % (msg, hb_host, hb_port)
+	sock.sendto(msg, (hb_host, hb_port))
 time.sleep(1)
 sock.close()