C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # Mount RPC client -- RFC 1094 (NFS), Appendix A # This module demonstrates how to write your own RPC client in Python. # When this example was written, there was no RPC compiler for # Python. Without such a compiler, you must first create classes # derived from Packer and Unpacker to handle the data types for the # server you want to interface to. You then write the client class. # If you want to support both the TCP and the UDP version of a # protocol, use multiple inheritance as shown below. import rpc from rpc import Packer, Unpacker, TCPClient, UDPClient # Program number and version for the mount protocol MOUNTPROG = 100005 MOUNTVERS = 1 # Size of the 'fhandle' opaque structure FHSIZE = 32 # Packer derived class for Mount protocol clients. # The only thing we need to pack beyond basic types is an 'fhandle' class MountPacker(Packer): def pack_fhandle(self, fhandle): self.pack_fopaque(FHSIZE, fhandle) # Unpacker derived class for Mount protocol clients. # The important types we need to unpack are fhandle, fhstatus, # mountlist and exportlist; mountstruct, exportstruct and groups are # used to unpack components of mountlist and exportlist and the # corresponding functions are passed as function argument to the # generic unpack_list function. class MountUnpacker(Unpacker): def unpack_fhandle(self): return self.unpack_fopaque(FHSIZE) def unpack_fhstatus(self): status = self.unpack_uint() if status == 0: fh = self.unpack_fhandle() else: fh = None return status, fh def unpack_mountlist(self): return self.unpack_list(self.unpack_mountstruct) def unpack_mountstruct(self): hostname = self.unpack_string() directory = self.unpack_string() return (hostname, directory) def unpack_exportlist(self): return self.unpack_list(self.unpack_exportstruct) def unpack_exportstruct(self): filesys = self.unpack_string() groups = self.unpack_groups() return (filesys, groups) def unpack_groups(self): return self.unpack_list(self.unpack_string) # These are the procedures specific to the Mount client class. # Think of this as a derived class of either TCPClient or UDPClient. class PartialMountClient: # This method is called by Client.__init__ to initialize # self.packer and self.unpacker def addpackers(self): self.packer = MountPacker() self.unpacker = MountUnpacker('') # This method is called by Client.__init__ to bind the socket # to a particular network interface and port. We use the # default network interface, but if we're running as root, # we want to bind to a reserved port def bindsocket(self): import os try: uid = os.getuid() except AttributeError: uid = 1 if uid == 0: port = rpc.bindresvport(self.sock, '') # 'port' is not used else: self.sock.bind(('', 0)) # This function is called to cough up a suitable # authentication object for a call to procedure 'proc'. def mkcred(self): if self.cred is None: self.cred = rpc.AUTH_UNIX, rpc.make_auth_unix_default() return self.cred # The methods Mnt, Dump etc. each implement one Remote # Procedure Call. This is done by calling self.make_call() # with as arguments: # # - the procedure number # - the arguments (or None) # - the "packer" function for the arguments (or None) # - the "unpacker" function for the return value (or None) # # The packer and unpacker function, if not None, *must* be # methods of self.packer and self.unpacker, respectively. # A value of None means that there are no arguments or is no # return value, respectively. # # The return value from make_call() is the return value from # the remote procedure call, as unpacked by the "unpacker" # function, or None if the unpacker function is None. # # (Even if you expect a result of None, you should still # return the return value from make_call(), since this may be # needed by a broadcasting version of the class.) # # If the call fails, make_call() raises an exception # (this includes time-outs and invalid results). # # Note that (at least with the UDP protocol) there is no # guarantee that a call is executed at most once. When you do # get a reply, you know it has been executed at least once; # when you don't get a reply, you know nothing. def Mnt(self, directory): return self.make_call(1, directory, \ self.packer.pack_string, \ self.unpacker.unpack_fhstatus) def Dump(self): return self.make_call(2, None, \ None, self.unpack