adb.py 文件源码

def _exec_cmd(self, args, shell, timeout):
        """Executes adb commands.

        Args:
            args: string or list of strings, program arguments.
                See subprocess.Popen() documentation.
            shell: bool, True to run this command through the system shell,
                False to invoke it directly. See subprocess.Popen() docs.
            timeout: float, the number of seconds to wait before timing out.
                If not specified, no timeout takes effect.

        Returns:
            The output of the adb command run if exit code is 0.

        Raises:
            AdbError: The adb command exit code is not 0.
            AdbTimeoutError: The adb command timed out.
        """
        proc = subprocess.Popen(
            args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=shell)
        process = psutil.Process(proc.pid)
        if timeout and timeout <= 0:
            raise Error('Timeout is not a positive value: %s' % timeout)
        if timeout and timeout > 0:
            try:
                process.wait(timeout=timeout)
            except psutil.TimeoutExpired:
                process.terminate()
                raise AdbTimeoutError(cmd=args, timeout=timeout)

        (out, err) = proc.communicate()
        ret = proc.returncode
        logging.debug('cmd: %s, stdout: %s, stderr: %s, ret: %s',
                      cli_cmd_to_string(args), out, err, ret)
        if ret == 0:
            return out
        else:
            raise AdbError(cmd=args, stdout=out, stderr=err, ret_code=ret)