85 lines
3.2 KiB
Python
85 lines
3.2 KiB
Python
################################################################################
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# #
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# Folding@Home Client Control (FAHControl) #
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# Copyright (C) 2016-2020 foldingathome.org #
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# Copyright (C) 2010-2016 Stanford University #
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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 <http://www.gnu.org/licenses/>. #
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# #
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################################################################################
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import sys
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import socket
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import threading
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import SocketServer
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import gtk
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from fah.Icon import get_icon
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single_app_host = '127.0.0.1'
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single_app_port = 32455
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single_app_addr = (single_app_host, single_app_port)
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class SingleAppRequestHandler(SocketServer.BaseRequestHandler):
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def handle(self):
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cmd = self.request.recv(1024).strip()
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if cmd == 'PING':
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self.server.ping.set()
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self.request.send('OK\r\n')
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elif cmd == 'EXIT':
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self.server.exit_requested.set()
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self.request.send('OK\r\n')
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class SingleAppServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
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allow_reuse_address = True
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def __init__(self):
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# Check to see if we are already running
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self.check_for_instance()
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self.ping = threading.Event()
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self.exit_requested = threading.Event()
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SocketServer.TCPServer.__init__(
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self, single_app_addr, SingleAppRequestHandler)
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thread = threading.Thread(target = self.serve_forever)
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# Exit the server thread when the main thread terminates
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thread.setDaemon(True)
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thread.start()
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def check_for_instance(self):
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sock = None
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.connect(single_app_addr)
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sock.send('PING')
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if sock.recv(1024).strip() == 'OK':
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print ('Already running')
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sys.exit(1)
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except socket.error:
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# Assume this is the first instance
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return
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finally:
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if sock is not None: sock.close()
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