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iotop
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files >> //proc/thread-self/root/proc/thread-self/root/usr/lib/python3.6/site-packages/iotop/genetlink.py
''' Netlink message generation/parsing Copyright 2007 Johannes Berg <johannes@sipsolutions.net> GPLv2+; See copying for details. ''' import struct from iotop.netlink import NLM_F_REQUEST, NLMSG_MIN_TYPE, Message, parse_attributes from iotop.netlink import NulStrAttr, Connection, NETLINK_GENERIC CTRL_CMD_UNSPEC = 0 CTRL_CMD_NEWFAMILY = 1 CTRL_CMD_DELFAMILY = 2 CTRL_CMD_GETFAMILY = 3 CTRL_CMD_NEWOPS = 4 CTRL_CMD_DELOPS = 5 CTRL_CMD_GETOPS = 6 CTRL_ATTR_UNSPEC = 0 CTRL_ATTR_FAMILY_ID = 1 CTRL_ATTR_FAMILY_NAME = 2 CTRL_ATTR_VERSION = 3 CTRL_ATTR_HDRSIZE = 4 CTRL_ATTR_MAXATTR = 5 CTRL_ATTR_OPS = 6 class GenlHdr: def __init__(self, cmd, version = 0): self.cmd = cmd self.version = version def _dump(self): return struct.pack("BBxx", self.cmd, self.version) def _genl_hdr_parse(data): return GenlHdr(*struct.unpack("BBxx", data)) GENL_ID_CTRL = NLMSG_MIN_TYPE class GeNlMessage(Message): def __init__(self, family, cmd, attrs=[], flags=0): self.cmd = cmd self.attrs = attrs self.family = family Message.__init__(self, family, flags=flags, payload=[GenlHdr(self.cmd)]+attrs) @staticmethod def recv(conn): msg = conn.recv() packet = msg.payload hdr = _genl_hdr_parse(packet[:4]) genlmsg = GeNlMessage(msg.type, hdr.cmd, [], msg.flags) genlmsg.attrs = parse_attributes(packet[4:]) genlmsg.version = hdr.version return genlmsg class Controller: def __init__(self, conn): self.conn = conn def get_family_id(self, family): a = NulStrAttr(CTRL_ATTR_FAMILY_NAME, family) m = GeNlMessage(GENL_ID_CTRL, CTRL_CMD_GETFAMILY, flags=NLM_F_REQUEST, attrs=[a]) m.send(self.conn) m = GeNlMessage.recv(self.conn) return m.attrs[CTRL_ATTR_FAMILY_ID].u16() connection = Connection(NETLINK_GENERIC) controller = Controller(connection)
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