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filebuf::attach

Usage

   #include <fstream.hpp>
   filebuf *filebuf::attach(int file_descriptor);

Description

   Attaches the specified file to an existing filebuf. Returns a pointer to
   itself if successful, or zero if a file was already attached. If a file
   is already attached, call close() first.

Example 

   filebuf fb;
   int fd = open(...);
   fb.attach(fd);

Return Value

   Pointer to the object for which it was called, or zero on failure.