#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <libaudit.h>

#define THREAD_COUNT 16

pthread_t t_id[THREAD_COUNT];

void * report_pid(void *arg) {

    int fd = audit_open();

    pthread_t id = pthread_self();

    pid_t pid = getpid();

    char str[16];
    
    for (int i = 0; i < THREAD_COUNT; i++) 
        if (pthread_equal(id, t_id[i])) {
            printf("Thread %d: PID = %d\n", i, pid);
            sprintf(str, "thread %d", i);
            audit_log_user_message(fd, AUDIT_USER, str, NULL, NULL, NULL, 1);
        }
    
    close(fd);

    return NULL;
}

int main(int argv, char *argc[]) {

    printf("Main: PID = %d\n", getpid());
    
    for (int i = 0; i < THREAD_COUNT; i++) {
        int err = pthread_create(&(t_id[i]), NULL, &report_pid, NULL);

        if (err != 0) {
            fprintf(stderr, "Cannot create thread %i: %s\n", i, strerror(err));
            exit(EXIT_FAILURE);
        
        }
    }

    sleep(3);
    
    exit(EXIT_SUCCESS);
}