|
|
# -*- coding: utf-8 -*-
|
|
|
#
|
|
|
# Copyright (C) 2015 GNS3 Technologies Inc.
|
|
|
#
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
|
# it under the terms of the GNU General Public License as published by
|
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
|
# (at your option) any later version.
|
|
|
#
|
|
|
# This program is distributed in the hope that it will be useful,
|
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
# GNU General Public License for more details.
|
|
|
#
|
|
|
# You should have received a copy of the GNU General Public License
|
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
|
|
|
import asyncio
|
|
|
import sys
|
|
|
import os
|
|
|
|
|
|
|
|
|
@asyncio.coroutine
|
|
|
def wait_run_in_executor(func, *args):
|
|
|
"""
|
|
|
Run blocking code in a different thread and wait
|
|
|
for the result.
|
|
|
|
|
|
:param func: Run this function in a different thread
|
|
|
:param args: Parameters of the function
|
|
|
:returns: Return the result of the function
|
|
|
"""
|
|
|
|
|
|
loop = asyncio.get_event_loop()
|
|
|
future = loop.run_in_executor(None, func, *args)
|
|
|
yield from asyncio.wait([future])
|
|
|
return future.result()
|
|
|
|
|
|
|
|
|
@asyncio.coroutine
|
|
|
def subprocess_check_output(*args, cwd=None, env=None):
|
|
|
"""
|
|
|
Run a command and capture output
|
|
|
|
|
|
:param *args: List of command arguments
|
|
|
:param cwd: Current working directory
|
|
|
:param env: Command environment
|
|
|
:returns: Command output
|
|
|
"""
|
|
|
|
|
|
proc = yield from asyncio.create_subprocess_exec(*args, stdout=asyncio.subprocess.PIPE, cwd=cwd, env=env)
|
|
|
output = yield from proc.stdout.read()
|
|
|
if output is None:
|
|
|
return ""
|
|
|
# If we received garbage we ignore invalid characters
|
|
|
# it should happend only when user try to use another binary
|
|
|
# and the code of VPCS, dynamips... Will detect it's not the correct binary
|
|
|
return output.decode("utf-8", errors="ignore")
|
|
|
|
|
|
|
|
|
@asyncio.coroutine
|
|
|
def wait_for_process_termination(process, timeout=10):
|
|
|
"""
|
|
|
Wait for a process terminate, and raise asyncio.TimeoutError in case of
|
|
|
timeout.
|
|
|
|
|
|
In theory this can be implemented by just:
|
|
|
yield from asyncio.wait_for(self._iou_process.wait(), timeout=100)
|
|
|
|
|
|
But it's broken before Python 3.4:
|
|
|
http://bugs.python.org/issue23140
|
|
|
|
|
|
:param process: An asyncio subprocess
|
|
|
:param timeout: Timeout in seconds
|
|
|
"""
|
|
|
|
|
|
while timeout > 0:
|
|
|
if process.returncode is not None:
|
|
|
return
|
|
|
yield from asyncio.sleep(0.1)
|
|
|
timeout -= 0.1
|
|
|
raise asyncio.TimeoutError()
|
|
|
|
|
|
|
|
|
@asyncio.coroutine
|
|
|
def _check_process(process, termination_callback):
|
|
|
if not hasattr(sys, "_called_from_test") or not sys._called_from_test:
|
|
|
returncode = yield from process.wait()
|
|
|
if asyncio.iscoroutinefunction(termination_callback):
|
|
|
yield from termination_callback(returncode)
|
|
|
else:
|
|
|
termination_callback(returncode)
|
|
|
|
|
|
|
|
|
def monitor_process(process, termination_callback):
|
|
|
"""Call termination_callback when a process dies"""
|
|
|
|
|
|
asyncio.async(_check_process(process, termination_callback))
|
|
|
|
|
|
|
|
|
@asyncio.coroutine
|
|
|
def wait_for_file_creation(path, timeout=10):
|
|
|
|
|
|
while timeout > 0:
|
|
|
if os.path.exists(path):
|
|
|
return
|
|
|
yield from asyncio.sleep(0.5)
|
|
|
timeout -= 0.5
|
|
|
raise asyncio.TimeoutError()
|
|
|
|
|
|
|
|
|
@asyncio.coroutine
|
|
|
def wait_for_named_pipe_creation(pipe_path, timeout=60):
|
|
|
|
|
|
import win32pipe
|
|
|
import pywintypes
|
|
|
|
|
|
while timeout > 0:
|
|
|
try:
|
|
|
win32pipe.WaitNamedPipe(pipe_path, 1)
|
|
|
except pywintypes.error:
|
|
|
yield from asyncio.sleep(0.5)
|
|
|
timeout -= 0.5
|
|
|
else:
|
|
|
return
|
|
|
raise asyncio.TimeoutError()
|
