我试图使用命名管道设置守护进程和客户端之间的双向通信。但是当尝试打开用于输入的命名管道时,代码会挂起。为什么?
class comm(threading.Thread):
def __init__(self):
self.srvoutf = './tmp/serverout'
self.srvinf = './tmp/serverin'
if os.path.exists(self.srvoutf):
self.pipein = open(self.srvoutf, 'r')
#-----------------------------------------------------Hangs here
else:
os.mkfifo(self.srvoutf)
self.pipein = open(self.srvoutf, 'r')
#-----------------------------------------------------or here
if os.path.exists(self.srvinf):
self.pipeout = os.open(self.srvinf, os.O_WRONLY)
else:
os.mkfifo(self.srvinf)
self.pipeout = os.open(self.srvinf, os.O_WRONLY)
threading.Thread.__init__ ( self )