How to get a FILE pointer from a file descriptor? How to get a FILE pointer from a file descriptor? c c

How to get a FILE pointer from a file descriptor?


c posix mkstemp

Use fdopen():

FILE* fp = fdopen(fd, "w");

c posix mkstemp

FILE* f = fdopen(d, "w");

man fdopen output:

SYNOPSIS

#include <stdio.h>FILE *fdopen(int fildes, const char *mode);

The fdopen() function associates a stream with the existing file descriptor, fildes. The mode of the stream must be compatible with the mode of the file descriptor. When the stream is closed via fclose(3), fildes is closed also.

c posix mkstemp

There is no standard way of doing this (or the reverse) as the C Standard has nothing to say about file descriptors. Your specific platform may or may not provide such a mechanism.

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