递归删除使用C目录 [英] Recursively remove a directory using C

问题描述

我想这个工具我自己和我拿出这样的：

I want to implement this myself and I come up something like this:

/* DIR *opendir(const char *name);
 *
 * Open a directory stream to argv[1] and make sure
 * it's a readable and valid (directory) */
if ((dip = opendir(argv[1])) == NULL)
{
        perror("opendir");
        return 0;
}

printf("Directory stream is now open\n");

/*  struct dirent *readdir(DIR *dir);
 *
 * Read in the files from argv[1] and print */
while ((dit = readdir(dip)) != NULL)
{
        printf("\n%s", dit->d_name);
        remove(dit->d_name);
}

我猜我已经开始从最深层次的东西删除，然后上去，但现在看来READDIR不给我这个顺序。

I am guessing I have to start delete things from the deepest level and then go up, but now it seems readdir does not give me that order.

请帮忙，谢谢！

推荐答案

您必须先下来递归一路到较低的水平，如下面的伪code：

You have to recurse all the way down to the lower levels first, as in the following pseudo code:

def delDir (d):
    # Delete the directories by recursion, files straight away.

    for every item in d:
        if item is a directory:
            delDir (item)
        else:
            delete file item

    # Finally, remove the directory itself.

    remove directory d

这是真的，这保证了您尝试删除父之前降低所有目录和文件将被删除。

That's it really, this guarantees that all lower directories and files are deleted before you attempt to remove the parent.

由于项目很可能是刚刚目录的电流分量，则可能需要使用来构建一个完整的名称，例如，的strcpy / strcat的：

Since item is likely to be just the current component of the directory, you may need to construct a full name using, for example, strcpy/strcat:

def delDir (dirName):
    def localBuff[enoughSpace]

    # Delete the directories by recursion, files straight away.

    dirHandle = dirOpen (dirName)
    itemName = dirnext (dirHandle)
    while itemName is valid:
        if itemName <> "." and itemName <> "..":
            strcpy dirName to localBuff
            strcat "/" to localBuff
            strcat itemName to localBuff

            if itemName is a directory:
                delDir (localBuff)
           else:
                delete file localBuff

        itemName = dirnext (dirHandle)

    dirClose (dirHandle)

    # Finally, remove the directory itself.

    remove directory dirName

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