Struggling to try and get a python daemon to work using Python 3.3.4. Im using the latest version of the python-daemon-3K from PyPi i.e. 1.5.8

Starting point is the following code found How do you create a daemon in Python? code i believe is 2.x Python.

import time
from daemon import runnerclass App():def __init__(self):self.stdin_path = '/dev/null'self.stdout_path = '/dev/tty'self.stderr_path = '/dev/tty'self.pidfile_path =  '/tmp/foo.pid'self.pidfile_timeout = 5def run(self):while True:print("Howdy!  Gig'em!  Whoop!")time.sleep(10)app = App()
daemon_runner = runner.DaemonRunner(app)
daemon_runner.do_action()

Attempting to run this i get the following error.

python mydaemon.py start
Traceback (most recent call last):File "mydaemon.py", line 60, in daemon_runner = runner.DaemonRunner(app)File "/depot/Python-3.3.4/lib/python3.3/site-packages/python_daemon_3K-1.5.8-py3.3.egg/daemon/runner.py", line 89, in initapp.stderr_path, 'w+', buffering=0)ValueError: can't have unbuffered text I/O

Any pointer how to translate to work with Python 3.3.4 or a good example of using the runner in python-daemon-3K

Thanks derek

To make the code run in python3 you need to make a change in the DaemonRunner class, you cannot have unbuffered text IO but you can have unbuffered bytes IO so changing the mode to'wb+' will work:

class DaemonRunner(object):self.parse_args()self.app = appself.daemon_context = DaemonContext()self.daemon_context.stdin = open(app.stdin_path, 'r') # for linux /dev/tty must be opened without buffering and with bself.daemon_context.stdout = open(app.stdout_path, 'wb+',buffering=0)# w+ -> wb+self.daemon_context.stderr = open(app.stderr_path, 'wb+', buffering=0)