#include <pthread.h>

#include <unistd.h>

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

pthread_t ntid;

void printids(const char *s)

{

pid_t pid;

pthread_t tid;

pid = getpid();

tid = pthread_self();

printf("%s pid %u tid %u (0x%x)\n", s, (unsigned int) pid, (unsigned int) tid, (unsigned int) tid);

printf("%s child thread id: %u\n",s, (unsigned int) ntid);

}

void *thr_fn(void *arg)

{

printids(arg);

return NULL;

}

int main(void)

{

int err;

if (0 != (err = pthread_create(&ntid, NULL, thr_fn, "new thread: "))) {

fprintf(stderr, "can't create thread: %s\n", strerror(err));

exit(1);

}

printids("main thread:");

sleep(1);

return 0;

}