process.py 文件源码

def writeSomeData(self, data):
        """Write some data to the open process.
        """
        try:
            rv = os.write(self.fd, data)
            if rv == len(data) and self.enableReadHack:
                self.startReading()
            return rv
        except IOError, io:
            if io.args[0] == errno.EAGAIN:
                return 0
            return CONNECTION_LOST
        except OSError, ose:
            if ose.errno == errno.EPIPE:
                return CONNECTION_LOST
            if ose.errno == errno.EAGAIN: # MacOS-X does this
                return 0
            raise