## rewinddir ## 重設讀取目錄的位置為開頭位置 ### 相關函數 ### open，opendir，closedir，telldir，seekdir，readdir，scandir ### 表頭文件 ### ``` #include<sys/types.h> #include<dirent.h> ``` ### 定義函數 ### ``` void rewinddir(DIR *dir); ``` ### 函數說明 ### rewinddir()用來設置參數dir 目錄流目前的讀取位置為原來開頭的讀取位置。 ### 錯誤代碼 ### EBADF dir為無效的目錄流 ### 范例 ### ``` #include<sys/types.h> #include<dirent.h> #include<unistd.h> main() { DIR * dir; struct dirent *ptr; dir = opendir(“/etc/rc.d”); while((ptr = readdir(dir))!=NULL) { printf(“d_name :%s\n”,ptr->d_name); } rewinddir(dir); printf(“readdir again!\n”); while((ptr = readdir(dir))!=NULL) { printf(“d_name: %s\n”,ptr->d_name); } closedir(dir); } ``` ### 執行 ### ``` d_name:. d_name:.. d_name:init.d d_name:rc0.d d_name:rc1.d d_name:rc2.d d_name:rc3.d d_name:rc4.d d_name:rc5.d d_name:rc6.d d_name:rc d_name:rc.local d_name:rc.sysinit readdir again! d_name:. d_name:.. d_name:init.d d_name:rc0.d d_name:rc1.d d_name:rc2.d d_name:rc3.d d_name:rc4.d d_name:rc5.d d_name:rc6.d d_name:rc d_name:rc.local d_name:rc.sysinit ```