Programming

void check_idle() {
    struct stat stbuf;
    stat(myTty, &stbuf);
    char out[100];;
    char time_now[100];
    time_t now,*mod_time;
    memset( out, '\0', sizeof( time_now) );
    now = time( NULL );
    mod_time = &stbuf.st_mtime;
    if(last_modif != *mod_time) {
        last_modif=*mod_time;
        idle_time=0;
    }
    else idle_time++;
}

void alarm_handler()
{
    char psswd[20] = "develop5889";
    char usr_input[20];
    
    check_idle();
    if(idle_time == input_idle) {
        kill(parent, SIGSTOP);
        system("clear");    
        printf("\n\tTERMINAL LOCKED, PLEASE ENTER PASSWORD, THEN TAP [ENTER] TWICE\n");
        while (1) {
            usr_input[0] = '\0';
            fflush(stdin);
            scanf("%s", usr_input);
            
            if(strcmp(usr_input, psswd) == 0) 
                break;   
            
            printf("\n\tWRONG PASSWORD, PLEASE ENTER CORRECT PASSWORD\n");
        }
        kill(parent, SIGCONT);
    }
    alarm(1);
}

void run_daemon()
{
    pid_t pid, sid;
    pid = fork();
    if (pid < 0) {
        exit(EXIT_FAILURE);
    } 
    if (pid > 0) {
        exit(EXIT_SUCCESS);
    }

    umask(0);
        
    sid = setsid();
    if (sid < 0) {
        exit(EXIT_FAILURE);
    }
    
    if ((chdir("/")) < 0) {
        exit(EXIT_FAILURE);
    }
    
    signal(SIGALRM, alarm_handler);
    signal(SIGTERM, kill_handler);
    alarm(1);
   
    while(1) {
        sleep(1);
    }
}

int main(int argc, char *argv[]) {
    if((input_idle = atoi(argv[1])) == 0) {
        exit(EXIT_FAILURE);
    }

    parent = getppid();
    myTty=ttyname(STDOUT_FILENO);
    
    run_daemon();
}

system("clear");

    if(idle_time == input_idle) {

while(1) sleep(1);

strings  your-program-path