#define _GNU_SOURCE
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <sched.h>
#include <time.h>

#define STKS	(4*4096)

#ifndef CLONE_NEWPID
#define CLONE_NEWPID    0x20000000
#endif

int main(int argc, char **argv)
{
	//int pid;
	//void *stk;
	int fd, i = 0;
    char log_file[] = "/var/log/piggie.log";

	time_t t;
	struct tm *timeinfo;

	//stk = mmap(NULL, STKS, PROT_READ | PROT_WRITE,
			//MAP_PRIVATE | MAP_ANON | MAP_GROWSDOWN, 0, 0);
	//pid = clone(do_test, stk + STKS, SIGCHLD | CLONE_NEWPID, argv[1]);
	//printf("Child forked, pid %d\n", pid);
	fd = open("/dev/null", O_RDONLY);
	if (fd != 0) {
		dup2(fd, 0);
		close(fd);
	}
    if(NULL != argv[1])
	    fd = open(argv[1], O_WRONLY | O_TRUNC | O_CREAT, 0600);
    else
        fd = open(log_file, O_WRONLY | O_TRUNC | O_CREAT, 0600);
        
	dup2(fd, 1);
	dup2(fd, 2);
	if (fd != 1 && fd != 2)
		close(fd);

	while (1) {
		sleep(1);
		time(&t);
		timeinfo = localtime(&t);
		printf("%d %s\n", i++, asctime(timeinfo));
		fflush(stdout);
	}


	return 0;
}