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

int main(void) {
	int fd = open("/dev/zero", O_RDONLY);
	char *c = mmap(NULL, 4096*16, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
	if (c == MAP_FAILED)
		error(1, errno, "mmap");
	printf("%p\n", c);
	return 0;
}