仅列出常规文件（无目录）问题 [英] List regular files only (without directory) problem

问题描述

你知道为什么这个程序没有列出某些文件，即使它们是常规的？：

Do you know why certain files are not listed by this program, even if they are "regular"?:

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

int main(void) {
  DIR *dh = opendir("./"); // directory handle
  struct dirent *file; // a 'directory entity' AKA file    
  struct stat info; // info about the file.
  while (file = readdir(dh)) {
    stat(file->d_name, &info);
    printf("note: file->d_name => %s\n", file->d_name);
    printf("note: info.st_mode => %i\n", info.st_mode);
    if (S_ISREG(info.st_mode))
      printf("REGULAR FILE FOUND! %s\n", file->d_name);
  }
  closedir(dh);

  return 0;
}

执行该程序后，我得到：

After executed this program, I get this:

note: file->d_name => .
note: info.st_mode => 16877
note: file->d_name => ..
note: info.st_mode => 16832
note: file->d_name => .DS_Store
note: info.st_mode => 16832
note: file->d_name => ef efeff
note: info.st_mode => 16832
note: file->d_name => ffffff
note: info.st_mode => 16832
note: file->d_name => ffffff - copie
note: info.st_mode => 16832
note: file->d_name => folder
note: info.st_mode => 16832
note: file->d_name => printiie.tt
note: info.st_mode => 16832
note: file->d_name => test.c
note: info.st_mode => 33188
REGULAR FILE FOUND! test.c
note: file->d_name => z
note: info.st_mode => 33188
REGULAR FILE FOUND! z

如您所见，该程序只看到两个文件。但是每个文件都是常规的，只有一个文件夹。

As you can see, the program see's only two files. But every file is regular, and there is only one folder.

这是shell命令的复制过程： $ ls -lai

Here is a copy past of the shell command: $ ls -lai :

total 64
2421444 drwxr-xr-x  10 denis  staff   340 27 oct 22:19 .
2416789 drwxr-xr-x@ 28 denis  staff   952 27 oct 22:20 ..
2423204 -rw-r--r--@  1 denis  staff  6148 27 oct 21:41 .DS_Store
2423206 -rwxr-xr-x@  1 denis  staff   895 27 oct 19:57 ef efeff
2423183 -rwxr-xr-x@  1 denis  staff   895 27 oct 19:57 ffffff
2423216 -rwxr-xr-x@  1 denis  staff   895 27 oct 19:57 ffffff - copie
2423436 drwxr-xr-x   2 denis  staff    68 27 oct 21:57 folder
2423180 -rw-r--r--@  1 denis  staff    38 27 oct 21:32 printiie.tt
2423682 -rw-r--r--@  1 denis  staff   895 27 oct 19:57 test.c
2423208 -rwxr-xr-x@  1 denis  staff    34 27 oct 21:39 z

我只想列出名字的每个文件，但没有目录。我在Mac OS X上工作，但我不认为这可能是问题的原因。

I would just like to list the name of each file, but without directories. I work on Mac OS X, but I don't think this could be the reason of the problem.

推荐答案

看起来像 stat 函数对某些文件失败，因此 info struct没有被更新，而且还有数据来自..。替换该行：

It looks like the stat function is failing for some of the files, so the info struct isn't being updated and still has the data in it from "..". Replace that line with:

if (stat(file->d_name, &info))
{
    printf("error: stat(%s): %s\n", file->d_name, strerror(errno));
    continue;
}

..你会看到为什么。

..and you'll see why.

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