#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <unistd.h>

int
main(int argc, char* argv[])
{
	int fd = -1;
	off_t len = 0, status = 0;
	const char* file = argv[1];
	void* p = 0;

	fd = open (file, O_RDWR, 00666);
	if (fd == -1)
	{
		printf("open(): fd = %d, errno %d\n", fd, errno);   
		exit(1);
	}

	len = lseek(fd, 0, SEEK_END);
	if (len == -1)
	{
		printf("lseek(SEEK_END): errno %d\n", errno);   
		exit(1);
	}

	status = lseek(fd, 0, SEEK_SET);
	if (len == -1)
	{
		printf("lseek(SEEK_SET): errno %d\n", errno);   
		exit(1);
	}

	p = mmap (0, len, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0);
	if (p == MAP_FAILED)
	{
		printf("mmap(): errno %d\n", errno);   
		exit(1);
	}

	sleep(300);
	return 0;
}