How to get a FILE pointer from a file descriptor?
Solution 1:
Use fdopen():
FILE* fp = fdopen(fd, "w");
Solution 2:
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 viafclose(3),fildesis closed also.