conque_subprocess.py 文件源码

def open(self, command, env={}):
        """ Create subprocess using forkpty() """

        # parse command
        command_arr = shlex.split(command)
        executable = command_arr[0]
        args = command_arr

        # try to fork a new pty
        try:
            self.pid, self.fd = pty.fork()

        except:

            return False

        # child proc, replace with command after altering terminal attributes
        if self.pid == 0:

            # set requested environment variables
            for k in env.keys():
                os.environ[k] = env[k]

            # set tty attributes
            try:
                attrs = tty.tcgetattr(1)
                attrs[0] = attrs[0] ^ tty.IGNBRK
                attrs[0] = attrs[0] | tty.BRKINT | tty.IXANY | tty.IMAXBEL
                attrs[2] = attrs[2] | tty.HUPCL
                attrs[3] = attrs[3] | tty.ICANON | tty.ECHO | tty.ISIG | tty.ECHOKE
                attrs[6][tty.VMIN] = 1
                attrs[6][tty.VTIME] = 0
                tty.tcsetattr(1, tty.TCSANOW, attrs)
            except:

                pass

            # replace this process with the subprocess
            os.execvp(executable, args)

        # else master, do nothing
        else:
            pass