mirror of
https://github.com/ARM-software/workload-automation.git
synced 2024-10-06 19:01:15 +01:00
132 lines
4.7 KiB
Python
132 lines
4.7 KiB
Python
# Copyright 2016 ARM Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import sys
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import time
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import os
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import logging
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from Queue import Queue, Empty
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from threading import Thread
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from subprocess import Popen, PIPE
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from wlauto.utils.misc import which
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from wlauto.exceptions import HostError
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class OutputPollingThread(Thread):
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def __init__(self, out, queue, name):
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super(OutputPollingThread, self).__init__()
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self.out = out
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self.queue = queue
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self.stop_signal = False
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self.name = name
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def run(self):
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for line in iter(self.out.readline, ''):
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if self.stop_signal:
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break
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self.queue.put(line)
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def set_stop(self):
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self.stop_signal = True
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class CrosSdkSession(object):
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def __init__(self, cros_path, password=''):
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self.logger = logging.getLogger(self.__class__.__name__)
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self.in_chroot = True if which('dut-control') else False
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ON_POSIX = 'posix' in sys.builtin_module_names
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if self.in_chroot:
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self.cros_sdk_session = Popen(['/bin/sh'], bufsize=1, stdin=PIPE, stdout=PIPE, stderr=PIPE,
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cwd=cros_path, close_fds=ON_POSIX, shell=True)
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else:
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cros_sdk_bin_path = which('cros_sdk')
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potential_path = os.path.join("cros_path", "chromium/tools/depot_tools/cros_sdk")
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if not cros_sdk_bin_path and os.path.isfile(potential_path):
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cros_sdk_bin_path = potential_path
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if not cros_sdk_bin_path:
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raise HostError("Failed to locate 'cros_sdk' make sure it is in your PATH")
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self.cros_sdk_session = Popen(['sudo -Sk {}'.format(cros_sdk_bin_path)], bufsize=1, stdin=PIPE,
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stdout=PIPE, stderr=PIPE, cwd=cros_path, close_fds=ON_POSIX, shell=True)
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self.cros_sdk_session.stdin.write(password)
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self.cros_sdk_session.stdin.write('\n')
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self.stdout_queue = Queue()
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self.stdout_thread = OutputPollingThread(self.cros_sdk_session.stdout, self.stdout_queue, 'stdout')
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self.stdout_thread.daemon = True
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self.stdout_thread.start()
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self.stderr_queue = Queue()
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self.stderr_thread = OutputPollingThread(self.cros_sdk_session.stderr, self.stderr_queue, 'stderr')
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self.stderr_thread.daemon = True
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self.stderr_thread.start()
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def kill_session(self):
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self.stdout_thread.set_stop()
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self.stderr_thread.set_stop()
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self.send_command('echo TERMINATE >&1') # send something into stdout to unblock it and close it properly
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self.send_command('echo TERMINATE 1>&2') # ditto for stderr
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self.stdout_thread.join()
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self.stderr_thread.join()
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self.cros_sdk_session.kill()
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def send_command(self, cmd, flush=True):
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if not cmd.endswith('\n'):
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cmd = cmd + '\n'
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self.logger.debug(cmd.strip())
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self.cros_sdk_session.stdin.write(cmd)
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if flush:
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self.cros_sdk_session.stdin.flush()
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def read_line(self, timeout=0):
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return _read_line_from_queue(self.stdout_queue, timeout=timeout, logger=self.logger)
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def read_stderr_line(self, timeout=0):
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return _read_line_from_queue(self.stderr_queue, timeout=timeout, logger=self.logger)
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def get_lines(self, timeout=0, timeout_only_for_first_line=True, from_stderr=False):
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lines = []
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line = True
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while line is not None:
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if from_stderr:
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line = self.read_stderr_line(timeout)
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else:
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line = self.read_line(timeout)
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if line:
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lines.append(line)
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if timeout and timeout_only_for_first_line:
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timeout = 0 # after a line has been read, no further delay is required
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return lines
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def _read_line_from_queue(queue, timeout=0, logger=None):
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try:
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line = queue.get_nowait()
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except Empty:
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line = None
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if line is None and timeout:
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sleep_time = timeout
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time.sleep(sleep_time)
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try:
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line = queue.get_nowait()
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except Empty:
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line = None
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if line is not None:
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line = line.strip('\n')
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if logger and line:
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logger.debug(line)
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return line
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