Example showing how to get all paths in a given folder using dirent readdir method.

dir_scan.cpp

#include <errno.h>
#include <dirent.h>

#include <iostream>
#include <vector>

using namespace std;


int dir_scan(const string & in_path, vector<string> & found_paths)
{

    DIR *dir;

    struct dirent *ent;

    if ((dir = opendir (in_path.c_str())) != nullptr)
    {
      while ((ent = readdir (dir)) != NULL)
      {
          cout << ent->d_name << endl;
          found_paths.emplace_back<string>(ent->d_name);
      }
      closedir (dir);
    }
    else
    {
      perror("could not open directory ");
      return EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}



int main(int argc, char **argv) {


    std::string in_folder = "/tmp";



    std::vector<string> found_files;

    if (dir_scan(in_folder, found_files) == 1)
    {
        cout << "some error occured";
        return 1;
    }



    for (const string & a_file : found_files)
    {
        cout << a_file << endl;
    }

    cout << "\nFound "<< found_files.size() <<" files" << endl;


    return 0;
}