fstream::attach

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.

fstream Overview |  Input Stream Classes

See Also   filebuf::attach, fstream::fd