#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>  

int main(int argc, char *argv[]){
    int f1;
    while(1){
        f1 = open("data.txt", O_RDONLY);
        if( f1 < 0){
            perror("data.txt");
            return 1;
        }

        char c;
        read(f1, &c, 1);
        printf("%d %c\n", f1, c);
        close(f1);
    }
    
    
    return 0;
}