C'est cool d'être daemonizable

diff --git a/historien.py b/historien.py
index acc6db2e098e0cfa2fce4dca3f2ee2fb44a88c91..8836af7caac02158ac554c6089eb366188f2e174 100755 (executable)
--- a/historien.py
+++ b/historien.py
@@ -5,15 +5,20 @@
 
 # Un bot IRC qui pose des questions d'histoire
 
-import irclib
-import ircbot
 import threading
 import random
 import time
 import pickle
 import re
+import signal
+import sys
 from cast_as_date import *
 
+# 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
+
 config_password="EtTaMère,ElleEstNéeQuand?"
 config_pseudo="historien"
 config_chanlist=["#bot","#flood"]
@@ -675,17 +680,48 @@ class Historien(ircbot.SingleServerIRCBot):
             self.last_activity[canal]=time.time()
     def is_active(self,canal):
         return time.time()-self.last_activity[canal]<config_idle_time
+    
+    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="historien.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 : historien.py <serveur> [--debug]"
+        print "Usage : historien.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/historien.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:
@@ -694,4 +730,21 @@ if __name__=="__main__":
         print "Server Unknown : %s"%(serveur)
         exit(404)
     historien=Historien(serveur,debug)
-    historien.start()
+    if daemon:
+        child_pid = os.fork()
+        if child_pid == 0:
+            os.setsid()
+            historien.start_as_daemon(outfile)
+        else:
+            # on enregistre le pid de historien
+            pidfile = "/var/run/bots/historien.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:
+        historien.start()
+