Ein sehr umfassendes Beispiel

Datei-Baum-Scanner

#include <iostream.h>

extern "C" {
#include <sys/types.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
}

void printdir(const char *dir)
{
  char fullname[256];  // path + name

  // for opendir()
  DIR *dir_pointer;

  // for readdir() 
  // the function itself allocates the structure
  // returns a pointer to it
  struct dirent *dirent_pointer; 

  // for lstat()
  // places the information in buffer which is allocated here
  // needs the pointer to the buffer
  struct stat statbuf; 

  dir_pointer = opendir(dir);
  for (dirent_pointer = readdir(dir_pointer); 
    dirent_pointer != NULL; dirent_pointer = readdir(dir_pointer))
  {
    // skip current and parent dir
    if ((!strcmp(dirent_pointer->d_name, ".")) || 
        (!strcmp(dirent_pointer->d_name, "..")))  
      continue;
    // build fullname
    strcpy(fullname, dir);
    strcat(fullname, "/");
    strcat(fullname, dirent_pointer->d_name);
    // get attributes of entry
    if (!lstat(fullname, &statbuf))
    {
      cout << dir << "/" << dirent_pointer->d_name;
      if (statbuf.st_mode & S_IFREG)    
        cout << " is a regular file" << endl;
      else if (statbuf.st_mode & S_IFDIR)
      {
        cout << " is a directory" << endl;
        printdir(fullname);
      }
      else 
        cout << " unkown type" << endl;
     }
     else 
        cerr << "Can't stat " << dir << "/" << dirent_pointer->d_name <<endl;
  }
  closedir(dir_pointer);
}

main() 
{
  char dir[] = "."; // start in current dir 
  printdir(dir);
}