#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <string.h>

#define MAXTAB 5

volatile sig_atomic_t keep_going = 1;

int getch()
{
    struct termios oldtc, newtc;
    int ch;
    tcgetattr(STDIN_FILENO, &oldtc);
    newtc = oldtc;
    newtc.c_lflag &= ~(ICANON | ECHO);
    tcsetattr(STDIN_FILENO, TCSANOW, &newtc);
    ch=getchar();
    tcsetattr(STDIN_FILENO, TCSANOW, &oldtc);

    return ch;
}

void catch_alarm (int sig)
     {
       keep_going = 0;
       signal (sig, catch_alarm);
     }

void do_stuff (char *temp)
     {
        int i;
        int j=0;

        char ch;
        ch = getch();

        while(ch!=10)
        {
            printf("*");
            temp[j]=ch;
            j++;
            ch = getch();
        }
       //puts ("Doing stuff while waiting for alarm....");
     }

int main (void)
{
    char temp[MAXTAB];
    char pass[] = "inter";

    /******************************/
    /*******************************/

    signal (SIGALRM, catch_alarm);
    alarm (5);

    while (keep_going)
         do_stuff (temp);

    if(strcmp(temp, pass) == 0)
        printf("Haslo jest poprawne");
    else
        printf("haslo jest niepoprawne");

    return EXIT_SUCCESS;
}