python守护进程例子，python守护进程,来自《python co

python守护进程例子，python守护进程,来自《python co

来自《python cookbook》：

[Python]代码

import osimport sysclass Daemonize:    def daemonize(self):        try:            pid = os.fork()            if pid > 0:                sys.exit(0)        except OSError,e:            sys.stderr.write("Fork 1 has failed --> %d--[%s]\n" \                             % (e.errno,e.strerror))            sys.exit(1)        os.chdir('/')        #detach from terminal        os.setsid()        #file to be created?        os.umask(0)        try:            pid = os.fork()            if pid > 0:                print "Daemon process pid %d" % pid                sys.exit(0)        except OSError, e:            sys.stderr.write("Fork 2 has failed --> %d--[%s]" \                             % (e.errno, e.strerror))            sys.exit(1)        sys.stdout.flush()        sys.stderr.flush()    def start_daemon(self):        self.daemonize()        self.run_daemon()    def run_daemon(self):        '''override'''        pass