83 lines
2.8 KiB
Python
83 lines
2.8 KiB
Python
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#!/usr/bin/env python3
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# common.py - PVC daemon function library, common fuctions
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import subprocess
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import threading
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import signal
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import os
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import time
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import pvcd.log as log
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class OSDaemon(object):
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def __init__(self, command, environment):
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self.proc = subprocess.Popen(
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command,
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env=environment,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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)
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def signal(self, sent_signal):
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signal_map = {
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'hup': signal.SIGHUP,
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'int': signal.SIGINT,
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'term': signal.SIGTERM
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}
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self.proc.send_signal(signal_map[sent_signal])
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def run_os_daemon(command_string, environment=None):
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command = command_string.split()
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daemon = OSDaemon(command, environment)
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return daemon
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# Run a oneshot command, optionally without blocking
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def run_os_command(command_string, background=False, environment=None):
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command = command_string.split()
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if background:
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def runcmd():
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subprocess.run(
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command,
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env=environment,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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)
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thread = threading.Thread(target=runcmd, args=())
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thread.start()
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return 0, None, None
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else:
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command_output = subprocess.run(
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command,
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env=environment,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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)
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return command_output.returncode, command_output.stdout.decode('ascii'), command_output.stderr.decode('ascii')
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# Reload the firewall rules of the system
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def reload_firewall_rules(rules_dir):
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log.echo('Updating firewall rules', '', 'o')
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rules_file = '{}/base.nft'.format(rules_dir)
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retcode, stdout, stderr = run_os_command('/usr/sbin/nft -f {}'.format(rules_file))
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if retcode != 0:
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log.echo('Failed to reload rules: {}'.format(stderr), '', 'e')
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