Chin's password test

passwd.c

// Chin

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

#define MAX_LEN 10

int fread_string(FILE *in, char out[], size_t len)
{
        // TODO investigate further this len thing
        if (fgets(out, len+1, in) == NULL) {
                if (feof(in)) return 1; // We could have returned EOF here but unfortunately EOF is also defined as -1
                else return -1; // Error
        }
        if (out[strlen(out)-1] == '\n') out[strlen(out)-1] = '\0'; // Replace the last '\n' with '\0'
        //strncpy(out, in, STRING_BUF_LEN);
        return 0;
}

int main() {
    char password[MAX_LEN] = "password\0";
    char user_string[MAX_LEN*2];
    
    fread_string(stdin, user_string, MAX_LEN);
    
    if (strlen(user_string) != strlen(password)) {
            printf("Bad!\n");
            return 0;
    }
    
    if (strncmp(password, user_string, strlen(password)) == 0) {
        printf("OK!\n");
    } else {
        printf("Bad!\n");
    }
    
    return 0;
}