listing files with posix C calls

ls_d.cpp

// Lists directories in the given path
  list_t ls_d(string path) {
    list_t output;
    DIR* dirp = opendir(path.c_str());
    struct dirent *file;
    if(dirp==NULL)
      return list_t();
    while ((file = readdir(dirp)) != NULL) {
      string name(file->d_name);
      if(!name.compare(".") || !name.compare("..")) continue;
      struct stat st;
      if(stat((path+"/"+name).c_str(),&st)) continue;
      if(S_ISDIR(st.st_mode)) {
	output.push_back(string(file->d_name)+"/");
      }
    }
    closedir(dirp);
    if(path.compare("/"))
      output.push_back("../");
    output.push_back("./");
    return output;
  }

ls_f.cpp

// Lists files in the given path
// list_t is a typedef for: vector<string>

// You will likely need these includes, among others
#include <vector>
#include <string>
#include <dirent.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/stat.h>

  list_t ls_f(string path) {
    list_t output;
    DIR* dirp = opendir(path.c_str());
    struct dirent *file;
    if(dirp==NULL)
      return list_t();
    while ((file = readdir(dirp)) != NULL) {
      string name(file->d_name);
      struct stat st;
      if(stat((path+"/"+name).c_str(),&st)) continue;
      if(S_ISREG(st.st_mode)) {
	if(filters.empty())
	  output.push_back(string(file->d_name));
	else
	  FOR_l(i,filters)
	    if(string(file->d_name).find(filters[i]) !=string::npos) {
	      output.push_back(string(file->d_name));
	      break;
	    }
      }
    }
    closedir(dirp);
    return output;
  }