C - Proper way to close files when using both open() and fdopen()

Question

So I\'m building a Unix minishell in C, and am implementing input, output, and err redirection, and have come across a problem with files. I open my files in a loop where I

Answer 1

FILE is a buffering object from standard C library. When you do fclose (standard C function) it will eventually call close (Unix system function) but only after making sure C library buffers are flushed. So, I would say, if you use fopen andfwrite then you should use fclose, and not just close, otherwise you risk loosing some data.

Answer 2

The standard says:

The fclose() function shall perform the equivalent of a close() on the file descriptor that is associated with the stream pointed to by stream.

So calling fclose is enough; it will also close the descriptor.