python实现的守护进程(Daemon)用法实例
本文实例讲述了python实现的守护进程(Daemon)用法。分享给大家供大家参考。具体如下：
def createDaemon():
"'Funzione che crea un demone per eseguire un determinato programma…"'
import os
# create - fork 1
try:
if os.fork() > 0: os._exit(0) # exit father…
except OSError, error:
print 'fork #1 failed: %d (%s)' % (error.errno, error.strerror)
os._exit(1)
# it separates the son from the father
os.chdir('/')
os.setsid()
os.umask(0)
# create - fork 2
try:
pid = os.fork()
if pid > 0:
print 'Daemon PID %d' % pid
os._exit(0)
except OSError, error:
print 'fork #2 failed: %d (%s)' % (error.errno, error.strerror)
os._exit(1)
funzioneDemo() # function demo
def funzioneDemo():
import time
fd = open('/tmp/demone.log', 'w')
while True:
fd.write(time.ctime()+'\n')
fd.flush()
time.sleep(2)
fd.close()
if __name__ == '__main__':
createDaemon()
希望本文所述对大家的Python程序设计有所帮助。