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

char *password = "Y3sterday";

int main(){
	printf("Enter the password:  \n");
	char user_password[32];
	scanf("%s", user_password);
	if(strcmp(user_password, password)){
		printf("You don't know the password, sorry\n");
		return 1;
	}

	int fd = open("/proc/testfile", O_RDONLY);
	int a = 762;
	char secret[100] = "This is a secret that this program is holding, T0morrow";
	char buffer[512];
	printf("Buffer is at address %p\n", buffer);
	ssize_t readlen = read(fd, buffer, 512);
	buffer[readlen] = 0;
	printf("buffer = %s\n", buffer);
	printf("At the end, our secret phrase is:  %s\n", secret);
	close(fd);
	if(a == 762)
		printf("Our variable remained unchanged\n");
	else 
		printf("a has changed to %d\n", a);
	return 0;
}