December 2013
Intermediate to advanced
496 pages
8h 57m
Chinese
Content preview from LINUX系統程式設計 第二版
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檔案與目錄的管理
|
283
ENAMETOOLONG
path
太長。
ENOENT
path
中有一個元件不存在，或者是一個懸置的符號連結。
ENOMEM
核心記憶體的可用空間不足以完成此項要求。
ENOSPC
包含
path
的裝置已無空間，或者用戶的磁碟配額已逾越限度。
ENOTDIR
path
中有一或多個元件不是目錄。
EPERM
包含
path
的檔案系統並不支援目錄的建立。
EROFS
包含
path
的檔案系統係以唯讀模式掛載。
移除目錄
mkdir()
的反向操作就是經過 POSIX 標準化的
rmdir()
，可用於從檔案系統階層移除一個
目錄：
#include <unistd.h>
int rmdir (const char *path);
執行成功時，
rmdir()
會從檔案系統移除
path
，而且會傳回
0
。
path
所指定的目錄必須是
空的，它只能包含「.」（ dot）和「..」（ dot-dot）目錄。系統呼叫並未實現與「rm -r」
等效的遞迴刪除功能。此類工具必須以手動方式對檔案系統進行深度優先搜尋，從葉節
點開始移除所有檔案和目錄，並在檔案系統中往上移動；
rmdir()
可用在每個階段，一
旦目錄中的檔案完成被移除，就可以移除該目錄。
執行失敗時，
rmdir()
會傳回
-1
，而且會把
errno
設定為下面其中一個值：
EACCESS
不允許對
path
的父目錄進行寫入操作，或者
path
中有一個元件無法被搜尋。
284
|
第八章
EBUSY
系統當前正在使用
path
，無法移除
path
。Linux 中，如果
path
是一個掛載點或是一
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.