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condor_file_basic.h

/***************************************************************
 *
 * Copyright (C) 1990-2007, Condor Team, Computer Sciences Department,
 * University of Wisconsin-Madison, WI.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You may
 * obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ***************************************************************/


#ifndef CONDOR_FILE_BASIC
#define CONDOR_FILE_BASIC

#include "condor_file.h"

/**
CondorFileBasic represents the operations that are common to files
accessed by syscalls, whether local or remote.  This object should
not be instantiated, it only serves as a starting point for
CondorFileLocal and CondorFileRemote.
*/

00033 class CondorFileBasic : public CondorFile {
public:
      CondorFileBasic( int mode );
      virtual ~CondorFileBasic();

      virtual int open( const char *url, int flags, int mode );
      virtual int close();

      virtual int ioctl( int cmd, long arg );
      virtual int fcntl( int cmd, int arg );

      virtual int ftruncate( size_t s );
      virtual int fsync();
      virtual int flush();
      virtual int fstat( struct stat *buf );

      virtual int is_readable();
      virtual int is_writeable();
      virtual int is_seekable();

      virtual int get_size();
      virtual char const      *get_url();

      virtual int get_unmapped_fd();

protected:
      int   fd;         // the real fd used by this file
      char  *url;

      int   readable;   // can this file be read?
      int   writeable;  // can this file be written?
      int   size;       // number of bytes in the file
      int   syscall_mode;     // mode to perform syscalls in
};

#endif

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