std::basic_fstream<CharT,Traits>::rdbuf

std::basic_filebuf<CharT, Traits>* rdbuf() const;		(since C++11)

Returns pointer to the underlying raw file device object.

(none)

Pointer to the underlying raw file device.

Language
Standard Library Headers
Freestanding and hosted implementations
Named requirements
Language support library
Concepts library (C++20)
Diagnostics library
Utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)
Filesystem library (C++17)
Technical Specifications

I/O manipulators
C-style I/O
Buffers
basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf (deprecated in C++98)
basic_syncbuf (C++20)
Streams
Abstractions
ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I/O
basic_ifstream
basic_ofstream
basic_fstream
String I/O
basic_istringstream
basic_ostringstream
basic_stringstream
Array I/O
istrstream (deprecated in C++98)
ostrstream (deprecated in C++98)
strstream (deprecated in C++98)
Synchronized Output
basic_osyncstream (C++20)
Types
streamoff
streamsize
fpos
Error category interface
iostream_category (C++11)
io_errc (C++11)

Member functions
basic_fstream::basic_fstream
basic_fstream::operator= (C++11)
basic_fstream::swap (C++11)
basic_fstream::rdbuf
File operations
basic_fstream::is_open
basic_fstream::open
basic_fstream::close
Non-member functions
basic_fstream::swap(std::basic_fstream) (C++11)