get address of Linux file descriptor

Question

There is fileno to get the file descriptor of a FILE*.

How do you get the address for the FILE* given a file descriptor number, e.g. as returned from pipe?

fileno pipe

Answer 1

You want to use the fdopen() function:

FILE * file = fdopen(fd, "r");

so you could use it in combination with pipe like this:

FILE * file = fdopen(pipe(..,..), "r");