如何确定父/其他目录中的文件和目录 [英] How to determine files and directories in parent/other directories

问题描述

我发现此处的其他问题的答案非常有帮助。

I found the answer to another question here to be very helpful.

似乎有一个sys / stat.h库的限制，因为当我试图查看其他目录时，所有内容都被视为一个目录。

There seems to be a limitation of the sys/stat.h library as when I tried to look in other directories everything was seen as a directory.

我想知道有没有人知道另一个系统功能，或者为什么它看到目前的工作目录之外的任何东西只是一个目录。

I was wondering if anyone knew of another system function or why it sees anything outside the current working directory as only a directory.

我感谢任何人提供的任何帮助，因为这让我很困惑，各种搜索都没有帮助。

I appreciate any help anyone has to offer as this is perplexing me and various searches have turned up no help.

我测试的代码是：

#include <sys/stat.h>
#include <dirent.h>
#include <stdio.h>

int main(void) {

        int status;

        struct stat st_buf;
        struct dirent *dirInfo;

        DIR *selDir;
        selDir = opendir("../");
                                    // ^ or wherever you want to look
        while ((dirInfo = readdir(selDir))) {

                status = stat (dirInfo->d_name, &st_buf);

                if (S_ISREG (st_buf.st_mode)) {
                        printf ("%s is a regular file.\n", dirInfo->d_name);
                }
                if (S_ISDIR (st_buf.st_mode)) {
                        printf ("%s is a directory.\n", dirInfo->d_name);
                }

        }

        return 0;

}

推荐答案

检查 stat 调用的状态;它是失败的。

You need to check the status of the stat call; it is failing.

麻烦的是，您正在寻找当前目录中的文件 the_file 实际上只在 ../ the_file 中找到。 readdir（）函数给出相对于另一个目录的名称，但 stat（）可以将当前目录

The trouble is that you're looking for a file the_file in the current directory when it is actually only found in ../the_file. The readdir() function gives you the name relative to the other directory, but stat() works w.r.t the current directory.

为了使其有效，您必须等同于：

To make it work, you'd have to do the equivalent of:

char fullname[1024];

snprintf(fullname, sizeof(fullname), "%s/%s", "..", dirInfo->d_name);

if (stat(fullname, &st_buf) == 0)
    ...report on success...
else
    ...report on failure...

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