Thread: Brief question about stdin

Hey,

I was wondering: If I use "fclose(stdin)" to deactivate keyboard input, how can I "reopen" stdin? I believe it has to do with fdopen().....?

Code:

#include <stdio.h>

int main(void) {
     int standard_input;

     standard_input = dup(STDIN_FILENO);
     fclose(stdin);
     fdopen(standard_input, "r");
     return 0;
}

dup:
http://www.rt.com/man/dup.2.html
fdopen:
http://www.neosoft.com/neosoft/man/fdopen.3.html

I get it now..... Much thanx

The following are not standard:
dup
fdopen

and the macro STDIN_FILENO

In ISO C, you interact with files through objects of type FILE *, there are no functions involving file descriptors, file handles etc.

Originally Posted by Thantos

Do you ever take the time to try and research your questions C+++C_forever? Since these functions reside in stdio.h its a pretty good possiblity that they are standard.

Do you ever take time to research your answers, Thantos? If you had even glanced at the links provided, you would've realized that the dup() and fdopen() functions are not ANSI-compliant, but POSIX-compliant.