#include <stdio.h>
#include <linux/types.h>
#include <linux/unistd.h>
#include <linux/dirent.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/errno.h>
#include <unistd.h>
#include <stdlib.h>

_syscall3(int, getdents, uint, fd, struct dirent *, dirp, uint, count);

int main(int argc, char *argv[])
{
	struct dirent dirent;
	int fd;
	int nread;
	struct dirent *p;
	off_t offset;

	if (argc != 2) {
		fprintf(stderr, "No dir specified\n");
		exit(1);
	}

	if ((fd = open(argv[1], O_RDONLY)) < 0) {
		fprintf(stderr, "Could not open directory %s\n", argv[1]);
		exit(2);
	}

	while ((nread = getdents(fd, &dirent, sizeof(dirent))) > 0) {
		p = &dirent;
		while (nread > 0) {
			printf("d_reclen = %d, d_name = %s, d_off = %lu\n", p->d_reclen, p->d_name, p->d_off);
			nread -= p->d_reclen;
			p = (struct dirent *)((char *)p + p->d_reclen);
		}
		offset = lseek(fd, 0, SEEK_CUR);
		printf("Offset is %llu\n", offset);
		if (lseek(fd, offset, SEEK_SET) < 0) {
			perror("lseek");
			exit(1);
		}
	}
	exit(0);
}