Jak uzyskać strumień FILE * z deskryptora pliku?

Question

Możemy uzyskać deskryptor pliku ze strumienia FILE * za pomocą funkcji Fileno. Czy istnieje funkcja uzyskiwania strumienia FILE * z deskryptora pliku bez ponownego otwierania pliku?

Answer 1

FILE *fdopen(int fd, const char *mode); 

Zobacz fdopen(3), ale powinno być na tej samej stronie co fopen(3)

The fdopen() function associates a stream with the existing file 
    descriptor, fd. The mode of the stream (one of the values "r", "r+", 
    "w", "w+", "a", "a+") must be compatible with the mode of the file 
    descriptor. The file position indicator of the new stream is set to 
    that belonging to fd, and the error and end-of-file indicators are 
    cleared. Modes "w" or "w+" do not cause truncation of the file. The 
    file descriptor is not dup’ed, and will be closed when the stream cre‐ 
    ated by fdopen() is closed. The result of applying fdopen() to a 
    shared memory object is undefined.