pthread 와 daemon 관련 질문입니다.

#include <stdlib.h>
#include <pthread.h> 
#include <syslog.h>
 
static pthread_t my_thread;
 
static void* thread_run(void* useless __attribute__((unused))){
    syslog(LOG_INFO, "thread running\n");
    while(1){ sleep(1); }
}
 
int main(int argc, char* argv[]){
    openlog("daemon_pthread_create", 0, 0);
    syslog(LOG_INFO, "main - before daemon()\n");
 
    if (daemon(0, 0) < 0) {
        syslog(LOG_INFO, "daemon(3) failed");
        exit(1);
    }
 
    syslog(LOG_INFO, "main - after daemon() before pthread_create()\n");
 
    if (pthread_create(&my_thread, NULL, thread_run, NULL) != 0)
    {
	    syslog(LOG_INFO, "pthread_create");
	    exit(1);
    }	  
 
    syslog(LOG_INFO, "main - after pthread_create\n");
    while(1){ sleep(1); }
 
}