C'est cool d'être daemonizable

diff --git a/themis.py b/themis.py
index 5062e5085b1e3f2febf8d55f52d0b14f98dd22fb..64212f7beeeaa6eaed05772dd9b0561b1d479aaa 100755 (executable)
--- a/themis.py
+++ b/themis.py
@@ -4,8 +4,6 @@
 
 # Un bot IRC pour kicker à tour de bras de #déprime
 
-import irclib
-import ircbot
 import threading
 import random
 import time
@@ -13,6 +11,13 @@ import socket, ssl, json
 import pickle
 import re
 import os
+import signal
+import sys
+
+# Oui, j'ai recodé ma version d'irclib pour pouvoir rattrapper les SIGHUP
+sys.path.insert(0, "/home/vincent/scripts/python-myirclib")
+import irclib
+import ircbot
 
 import sys
 config_debug_stdout=True
@@ -680,18 +685,48 @@ class Themis(ircbot.SingleServerIRCBot):
     def _getnick(self):
         return self.serv.get_nickname()
     nick=property(_getnick)
+    
+    def start_as_daemon(self, outfile):
+        sys.stderr = Logger(outfile)
+        self.start()
+
+
+class Logger(object):
+    """Pour écrire ailleurs que sur stdout"""
+    def __init__(self, filename="themis.full.log"):
+        self.filename = filename
+
+    def write(self, message):
+        f = open(self.filename, "a")
+        f.write(message)
+        f.close()
 
 
 if __name__=="__main__":
     import sys
     if len(sys.argv)==1:
-        print "Usage : themis.py <serveur> [--debug]"
+        print "Usage : themis.py <serveur> [--debug] [--no-output] [--daemon [--pidfile]] [--outfile]"
+        print "        --outfile sans --no-output ni --daemon n'a aucun effet"
         exit(1)
     serveur=sys.argv[1]
+    if "--daemon" in sys.argv:
+        thisfile = os.path.realpath(__file__)
+        thisdirectory = thisfile.rsplit("/", 1)[0]
+        os.chdir(thisdirectory)
+        daemon = True
+    else:
+        daemon = False
     if "debug" in sys.argv or "--debug" in sys.argv:
         debug=True
     else:
         debug=False
+    if "--no-output" in sys.argv or "--daemon" in sys.argv:
+        outfile = "/var/log/bots/themis.full.log"
+        for arg in sys.argv:
+            arg = arg.split("=")
+            if arg[0].strip('-') in ["out", "outfile", "logfile"]:
+                outfile = arg[1]
+        sys.stdout = Logger(outfile)
     serveurs={"a♡":"acoeur.crans.org","acoeur":"acoeur.crans.org","acoeur.crans.org":"acoeur.crans.org",
               "irc":"irc.crans.org","crans":"irc.crans.org","irc.crans.org":"irc.crans.org"}
     try:
@@ -700,4 +735,21 @@ if __name__=="__main__":
         print "Server Unknown : %s"%(serveur)
         exit(404)
     themis=Themis(serveur,debug)
-    themis.start()
+    if daemon:
+        child_pid = os.fork()
+        if child_pid == 0:
+            os.setsid()
+            themis.start_as_daemon(outfile)
+        else:
+            # on enregistre le pid de themis
+            pidfile = "/var/run/bots/themis.pid"
+            for arg in sys.argv:
+                arg = arg.split("=")
+                if arg[0].strip('-') in ["pidfile"]:
+                    pidfile = arg[1]
+            f = open(pidfile, "w")
+            f.write("%s\n" % child_pid)
+            f.close()
+    else:
+        themis.start()
+