Salam, I tried a similar daemon and it was still working after closing the terminal:
#!/usr/bin/python import os def lo(): while 1: print 1 p=os.fork() if (p==0): lo() else: print "error:", p and when trying yours, it also behaves properly as a deamon :) I don't why this is happening with you, but maybe... (I'll think over it again) N.B. The other file that I gave the link in previous email is attached. On 12/24/07, moayyad sadi <[EMAIL PROTECTED]> wrote: > > > In Python, you can use os.fork() and os.setsid() which are the > substitutes > > of C's fork() and setsid() (of course, you need to import os library). > > > > > I tried that > it did not work, > I write a small script that do > from os import * > from time import * # or something like that > def loop(): > for i in xrange(65000): print i; sleep(i) > #main > p=fork() > if p==0: loop() > else: print "this is the parent, child pid=%d\ndone\n" % p > > and when I run it then close the terminal then open another one and type > ps ax | grep python > it did not appear > > while the same code in C works > > > http://homepage.hispeed.ch/py430/python/daemon.py > > > please send it to my email as an attachement, I don't have internet > please, > _______________________________________________ > Developer mailing list > [email protected] > http://lists.arabeyes.org/mailman/listinfo/developer -- It is the darkest under the lighthouse
#!/usr/bin/env python ########################################################################### # configure these paths: LOGFILE = '/var/log/pydaemon.log' PIDFILE = '/var/run/pydaemon.pid' # and let USERPROG be the main function of your project import mymain USERPROG = mymain.main ########################################################################### #based on Jürgen Hermanns http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012 import sys, os class Log: """file like for writes with auto flush after each write to ensure that everything is logged, even during an unexpected exit.""" def __init__(self, f): self.f = f def write(self, s): self.f.write(s) self.f.flush() def main(): #change to data directory if needed os.chdir("/root/data") #redirect outputs to a logfile sys.stdout = sys.stderr = Log(open(LOGFILE, 'a+')) #ensure the that the daemon runs a normal user os.setegid(103) #set group first "pydaemon" os.seteuid(103) #set user "pydaemon" #start the user program here: USERPROG() if __name__ == "__main__": # do the UNIX double-fork magic, see Stevens' "Advanced # Programming in the UNIX Environment" for details (ISBN 0201563177) try: pid = os.fork() if pid > 0: # exit first parent sys.exit(0) except OSError, e: print >>sys.stderr, "fork #1 failed: %d (%s)" % (e.errno, e.strerror) sys.exit(1) # decouple from parent environment os.chdir("/") #don't prevent unmounting.... os.setsid() os.umask(0) # do second fork try: pid = os.fork() if pid > 0: # exit from second parent, print eventual PID before #print "Daemon PID %d" % pid open(PIDFILE,'w').write("%d"%pid) sys.exit(0) except OSError, e: print >>sys.stderr, "fork #2 failed: %d (%s)" % (e.errno, e.strerror) sys.exit(1) # start the daemon main loop main()
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