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

pthread_t ntid;

void printids(const char *s) {
  pid_t pid;
  pthread_t tid;

  pid = getpid();
  tid = pthread_self();
  printf("%s pid %lu tid %lu (0x%lx)\n", s, (unsigned long) pid, (unsigned long) tid, (unsigned long) tid);
}

void *thr_fn(void *arg) {
  printids("new thread:");
  return (void *)0;
}

int main(void) {
  int err;

  err = pthread_create(&ntid, NULL, thr_fn, NULL);
  if(err != 0) {
    printf("create thread error\n");
    return -1;
  }
  printids("main thread:");
  sleep(1);
  return 0;
}