core-admin/qubes/qmemman/client.py

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# pylint: skip-file
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2010 Rafal Wojtczuk <rafal@invisiblethingslab.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <https://www.gnu.org/licenses/>.
#
import socket
import fcntl
class QMemmanClient:
def request_memory(self, amount):
self.sock = socket.socket(socket.AF_UNIX)
flags = fcntl.fcntl(self.sock.fileno(), fcntl.F_GETFD)
flags |= fcntl.FD_CLOEXEC
fcntl.fcntl(self.sock.fileno(), fcntl.F_SETFD, flags)
self.sock.connect("/var/run/qubes/qmemman.sock")
self.sock.send(str(int(amount)).encode('ascii')+b"\n")
received = self.sock.recv(1024).strip()
if received == b'OK':
return True
else:
return False
def close(self):
self.sock.close()