class TDCacheFile: public TFile

 Create a dCache file object. A dCache file is the same as a TFile
 except that it is being accessed via a dCache server. The url
 argument must be of the form: dcache:/pnfs/<path>/<file>.root or
 dcap://<nodename.org>/<path>/<file>.root. If the file specified in the
 URL does not exist, is not accessable or can not be created the kZombie
 bit will be set in the TDCacheFile object. Use IsZombie() to see if the
 file is accessable. For a description of the option and other arguments
 see the TFile ctor. The preferred interface to this constructor is
 via TFile::Open().

 Close and cleanup dCache file.

 Read specified byte range from remote file via dCache daemon.
 Returns kTRUE in case of error.

 Read the nbuf blocks described in arrays pos and len,
 where pos[i] is the seek position of block i of length len[i].
 Note that for nbuf=1, this call is equivalent to TFile::ReafBuffer.
 This function is overloaded by TNetFile, TWebFile, etc.
 Returns kTRUE in case of failure.

 Write specified byte range to remote file via dCache daemon.
 Returns kTRUE in case of error.

 Stage() returns kTRUE on success and kFALSE on failure.

 CheckFile() returns kTRUE on success and kFALSE on failure.  In
 case the file exists but is not cached, CheckFile() returns
 kFALSE and errno is set to EAGAIN.

 Set file open timeout.

 Set on error handler.

 Set reply host name.

 Return dCache version string.

 Interface to system open. All arguments like in POSIX open.

 Interface to system close. All arguments like in POSIX close.

 Interface to system read. All arguments like in POSIX read.

 Interface to system write. All arguments like in POSIX write.

 Interface to system seek. All arguments like in POSIX lseek.

 Interface to system sync. All arguments like in POSIX fsync.
 dCache always keep it's files sync'ed, so there's no need to
 sync() them manually.

 Get info about a file: id, size, flags, modification time.
 Id      is (statbuf.st_dev << 24) + statbuf.st_ino
 Size    is the file size
 Flags   is file type: 0 is regular file, bit 0 set executable,
                       bit 1 set directory, bit 2 set special file
                       (socket, fifo, pipe, etc.)
 Modtime is modification time.
 The function returns 0 in case of success and 1 if the file could
 not be stat'ed.

 Method resetting the dc_errno and errno.

 Transform the input path into a path usuable by the dcap C library,
 i.e either dcap://nodename.org/where/filename.root or
 /pnfs/where/filename.root