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如何让 readdir 忽略 C/C++ 中的目录？

发布于 2024-08-29 12:55:42 字数 62 浏览 10 评论 0原文

我正在使用 readdir 读取当前库的内容，但我只想处理文件而不是目录。我如何知道我指向的是目录而不是文件？

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始于初秋 2024-09-05 12:55:42

您可以使用 lstat 和 S_ISDIR 宏。

例如，没有错误检查：

struct stat buffer;
int status;
char path[PATH_MAX];
DIR *dir = opendir(dir_name);
... 
struct dirent *de = readdir(dir);
sprintf(path, "%s/%s", dir_name, de->d_name);
status = lstat(path, &buffer);
if(S_ISDIR(buffer.st_mode))
{
   ...
}

编辑：修复为在 lstat 路径中包含目录（根据 el.pescado）。正如 R Samuel Klatchko 所指出的，您可能希望采用白名单方法 (S_ISREG)，而不是在出现类型时将其列入黑名单。

You can use lstat, and the S_ISDIR macro.

E.g. without error-checking:

struct stat buffer;
int status;
char path[PATH_MAX];
DIR *dir = opendir(dir_name);
... 
struct dirent *de = readdir(dir);
sprintf(path, "%s/%s", dir_name, de->d_name);
status = lstat(path, &buffer);
if(S_ISDIR(buffer.st_mode))
{
   ...
}

EDIT: Fixed to include directory in lstat path (per el.pescado). As noted by R Samuel Klatchko, you may want to take a whitelist approach (S_ISREG) instead of blacklisting types as they come up.

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撩人痒 2024-09-05 12:55:42

`void DirectryNFileCount(const char * FileDir)
 {
  DIR *dir;
  int filecount;
  int dircount;
  struct dirent *direntry;
  if ((dir = opendir (FileDir)) == NULL) 
  {
   /*Error code*/
   } 
 while((direntry = readdir (dir)) != NULL)
 {
 if(direntry->d_type==DT_DIR)
 dircount++;
/*do something with directries      */
 }
 else 
 {
  filecount++;
  std::cout<<"Files Names"<<direntry->d_name<<std::endl; 
 }
 }
  std::cout<<"THIS Directory has "<<filecount<<" FILES and "<<dircount<< " DIRECTORIES";
}

`void DirectryNFileCount(const char * FileDir)
 {
  DIR *dir;
  int filecount;
  int dircount;
  struct dirent *direntry;
  if ((dir = opendir (FileDir)) == NULL) 
  {
   /*Error code*/
   } 
 while((direntry = readdir (dir)) != NULL)
 {
 if(direntry->d_type==DT_DIR)
 dircount++;
/*do something with directries      */
 }
 else 
 {
  filecount++;
  std::cout<<"Files Names"<<direntry->d_name<<std::endl; 
 }
 }
  std::cout<<"THIS Directory has "<<filecount<<" FILES and "<<dircount<< " DIRECTORIES";
}

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~没有更多了~