void attach( filedesc fd );
Attaches this stream to the open file specified by fd.
Parameter
fd
A file descriptor as returned by a call to the run-time function _open or _sopen; filedesc is a typedef equivalent to int.
Remarks
The function fails when the stream is already attached to a file. In that case, the function sets ios::failbit in the stream’s error state.
ifstream Overview | Input Stream Classes
See Also filebuf::attach, ifstream::fd