What's the int macro for stdin?

Question

stdin is of type FILE *,

is there a fd macro for it?

Or do I need to convert it myself?

Fragile

You could just "guess" that stdin <==> 0; stdout <==> 1; stderr <==> 2 – Bathypelagic

There's no need to guess - POSIX requires that, so you could legitimately just use the numbers. – Sneaky

Answer 1

STDIN_FILENO from unistd.h

Cheryllches

Answer 2

fileno(stdin)

Sinistrocular

Answer 3

The following are the integer file descriptors for the standard streams:

• 0: stdin
• 1: stdout
• 2: stderr

Auklet

Answer 4

#include<unistd.h>
#include<stdlib.h>
int main(){
    
    char ch;
    read(STDIN_FILENO,&ch,1);
    write(STDOUT_FILENO,&ch,1);

    exit(EXIT_SUCCESS);
}

Eck