| #!/usr/bin/env python |
| |
| ''' |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ''' |
| |
| import logging |
| import subprocess |
| import os |
| import tempfile |
| import signal |
| import sys |
| import threading |
| import time |
| import traceback |
| import pprint |
| import platform |
| |
| if platform.system() != "Windows": |
| try: |
| import pwd |
| except ImportError: |
| import winpwd as pwd |
| |
| global serverTracker |
| serverTracker = {} |
| logger = logging.getLogger() |
| |
| shellRunner = None |
| threadLocal = threading.local() |
| gracefull_kill_delay = 5 # seconds between SIGTERM and SIGKILL |
| tempFiles = [] |
| def noteTempFile(filename): |
| tempFiles.append(filename) |
| |
| def getTempFiles(): |
| return tempFiles |
| |
| class _dict_to_object: |
| def __init__(self, entries): |
| self.__dict__.update(entries) |
| def __getitem__(self, item): |
| return self.__dict__[item] |
| # windows specific code |
| def _kill_process_with_children_windows(parent_pid): |
| shellRunner().run(["taskkill", "/T", "/PID", "{0}".format(parent_pid)]) |
| |
| |
| class shellRunnerWindows: |
| # Run any command |
| def run(self, script, user=None): |
| logger.warn("user argument ignored on windows") |
| code = 0 |
| if not isinstance(script, list): |
| cmd = " " |
| cmd = cmd.join(script) |
| else: |
| cmd = script |
| p = subprocess.Popen(cmd, stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE, shell=False) |
| out, err = p.communicate() |
| code = p.wait() |
| logger.debug("Exitcode for %s is %d" % (cmd, code)) |
| return {'exitCode': code, 'output': out, 'error': err} |
| |
| def runPowershell(self, file=None, script_block=None, args=[]): |
| logger.warn("user argument ignored on windows") |
| code = 0 |
| cmd = None |
| if file: |
| cmd = ['powershell', '-WindowStyle', 'Hidden', '-File', file] + args |
| elif script_block: |
| cmd = ['powershell', '-WindowStyle', 'Hidden', '-Command', script_block] + args |
| p = subprocess.Popen(cmd, stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE, shell=False) |
| out, err = p.communicate() |
| code = p.wait() |
| logger.debug("Exitcode for %s is %d" % (cmd, code)) |
| return _dict_to_object({'exitCode': code, 'output': out, 'error': err}) |
| |
| |
| #linux specific code |
| def _kill_process_with_children_linux(parent_pid): |
| def kill_tree_function(pid, signal): |
| ''' |
| Kills process tree starting from a given pid. |
| ''' |
| # The command below starts 'ps' linux utility and then parses it's |
| # output using 'awk'. AWK recursively extracts PIDs of all children of |
| # a given PID and then passes list of "kill -<SIGNAL> PID" commands to 'sh' |
| # shell. |
| CMD = """ps xf | awk -v PID=""" + str(pid) + \ |
| """ ' $1 == PID { P = $1; next } P && /_/ { P = P " " $1;""" + \ |
| """K=P } P && !/_/ { P="" } END { print "kill -""" \ |
| + str(signal) + """ "K }' | sh """ |
| process = subprocess.Popen(CMD, stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE, shell=True) |
| process.communicate() |
| _run_kill_function(kill_tree_function, parent_pid) |
| |
| def _run_kill_function(kill_function, pid): |
| try: |
| kill_function(pid, signal.SIGTERM) |
| except Exception, e: |
| logger.warn("Failed to kill PID %d" % (pid)) |
| logger.warn("Reported error: " + repr(e)) |
| |
| time.sleep(gracefull_kill_delay) |
| |
| try: |
| kill_function(pid, signal.SIGKILL) |
| except Exception, e: |
| logger.error("Failed to send SIGKILL to PID %d. Process exited?" % (pid)) |
| logger.error("Reported error: " + repr(e)) |
| |
| def _changeUid(): |
| try: |
| os.setuid(threadLocal.uid) |
| except Exception: |
| logger.warn("can not switch user for running command.") |
| |
| |
| class shellRunnerLinux: |
| # Run any command |
| def run(self, script, user=None): |
| try: |
| if user != None: |
| user = pwd.getpwnam(user)[2] |
| else: |
| user = os.getuid() |
| threadLocal.uid = user |
| except Exception: |
| logger.warn("can not switch user for RUN_COMMAND.") |
| code = 0 |
| cmd = " " |
| cmd = cmd.join(script) |
| p = subprocess.Popen(cmd, preexec_fn=_changeUid, stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE, shell=True, close_fds=True) |
| out, err = p.communicate() |
| code = p.wait() |
| logger.debug("Exitcode for %s is %d" % (cmd, code)) |
| return {'exitCode': code, 'output': out, 'error': err} |
| |
| |
| def kill_process_with_children(parent_pid): |
| if platform.system() == "Windows": |
| _kill_process_with_children_windows(parent_pid) |
| else: |
| _kill_process_with_children_linux(parent_pid) |
| |
| |
| if platform.system() == "Windows": |
| shellRunner = shellRunnerWindows |
| else: |
| shellRunner = shellRunnerLinux |