/* $Id$ */

#define _GNU_SOURCE 1

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <assert.h>
#include <linux/unistd.h>
#include <string.h>


static _syscall3(long, getdents64, uint, fd, struct dirent64 *, dirp, uint, count);

int main(int argc,char **argv)
{
int fd;

	if (argc!=2) {
		fprintf(stderr,"Required directory name argument!\n");
		exit(EXIT_FAILURE);
		}
	if (-1==(fd=open(argv[1],O_RDONLY /* |O_DIRECTORY */))) {
		fprintf(stderr,"open(\"%s\"): %m\n",argv[1]);
		exit(EXIT_FAILURE);
		}
	for (;;) {
off_t off;
char buf[100];
struct dirent64 *dirent64;
int got;

		if ((off_t)-1==(off=lseek(fd,0,SEEK_CUR))) {
			fprintf(stderr,"lseek(): %m\n");
			exit(EXIT_FAILURE);
		}
		printf("@=%lld\n",(long long)off);
		memset(buf,0,sizeof(buf));
		got=getdents64(fd,(void *)buf,sizeof(buf));
		printf("got=%d\n",got);
		if (got==-1)
			perror("getdents()");
		assert(got<=sizeof(buf));
		if (!got)
			break;
		for (
				dirent64=(void *)buf;
				(char *)dirent64<buf+got;
				dirent64=(void *)((char *)dirent64+dirent64->d_reclen)
				) {
			printf("dirent64_rel=%d, d_off=0x%llx; d_ino=%llu, d_reclen=%u, d_type=%u, d_name=%s\n",
					(char *)dirent64-buf,
					(long long)dirent64->d_off,(unsigned long long)dirent64->d_ino,
					(unsigned)dirent64->d_reclen,
					(unsigned)dirent64->d_type,dirent64->d_name);
			}
		printf("trailing=%d\n",(buf+got)-(char *)dirent64);
		}
	puts("done");
	return EXIT_SUCCESS;
}