//
// ls.c
// apue
//
// Created by chenqing on 13-8-22.
// Copyright (c) 2013年 chenqing. All rights reserved.
//
 
#include "/usr/include/apue.h"
#include "dirent.h"
 
int main(int argc,char *argv[])
{
 DIR *dp ; //創建一個DIR結構的指針
    //更多信息參考http://www.gnu.org/software/libc/manual/html_node/Opening-a-Directory.html
 struct dirent *dirp;
 if (argc != 2) {
  err_sys("需要兩個參數"); //err_sys 是在error.c中定義的一個函數
 }
  
 if ((dp = opendir(argv[1])) == NULL) {
  err_quit("讀取目錄出錯了！");
 }
 while ((dirp = readdir(dp)) != NULL) {
  printf("%s\n",dirp->d_name);
 }
  
 closedir(dp);
 exit(0);
 
}