コード例 #1
0
        public Privilege( string privilegeName )
        {
            if ( privilegeName == null )
            {
                throw new ArgumentNullException( "privilegeName" );
            }

            this.luid = LuidFromPrivilege( privilegeName );
        }
コード例 #2
0
        //
        // This routine is a wrapper around a hashtable containing mappings
        // of privilege names to luids
        //
        private static Luid LuidFromPrivilege( string privilege )
        {
            Luid luid;
            luid.LowPart = 0;
            luid.HighPart = 0;

            //
            // Look up the privilege LUID inside the cache
            //

            try
            {
                privilegeLock.AcquireReaderLock(Timeout.Infinite);

                if ( luids.Contains( privilege ))
                {
                    luid = ( Luid )luids[ privilege ];

                    privilegeLock.ReleaseReaderLock();
                }
                else
                {
                    privilegeLock.ReleaseReaderLock();

                    if ( false == NativeMethods.LookupPrivilegeValue( null, privilege, ref luid ))
                    {
                        int error = Marshal.GetLastWin32Error();

                        if ( error == NativeMethods.ERROR_NOT_ENOUGH_MEMORY )
                        {
                            throw new OutOfMemoryException();
                        }
                        else if ( error == NativeMethods.ERROR_ACCESS_DENIED )
                        {
                            throw new UnauthorizedAccessException( "Caller does not have the rights to look up privilege local unique identifier" );
                        }
                        else if ( error == NativeMethods.ERROR_NO_SUCH_PRIVILEGE )
                        {
                            throw new ArgumentException(
                                string.Format( "{0} is not a valid privilege name", privilege ),
                                "privilege" );
                        }
                        else
                        {
                            throw new Win32Exception( error );
                        }
                    }

                    privilegeLock.AcquireWriterLock(Timeout.Infinite);
                }
            }
            finally
            {
                if ( privilegeLock.IsReaderLockHeld )
                {
                    privilegeLock.ReleaseReaderLock();
                }

                if ( privilegeLock.IsWriterLockHeld )
                {
                    if ( !luids.Contains( privilege ))
                    {
                        luids[ privilege ] = luid;
                        privileges[ luid ] = privilege;
                    }

                    privilegeLock.ReleaseWriterLock();
                }
            }

            return luid;
        }