Boost C++ Libraries

libs/filesystem/example/simple_ls.cpp

//  simple_ls program  -------------------------------------------------------//

//  Copyright Jeff Garland and Beman Dawes, 2002

//  Use, modification, and distribution is subject to the Boost Software
//  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)

//  See http://www.boost.org/libs/filesystem for documentation.

//  As an example program, we don't want to use any deprecated features
#ifndef BOOST_FILESYSTEM_NO_DEPRECATED
#define BOOST_FILESYSTEM_NO_DEPRECATED
#endif
#ifndef BOOST_SYSTEM_NO_DEPRECATED
#define BOOST_SYSTEM_NO_DEPRECATED
#endif

#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/directory.hpp>
#include <boost/filesystem/path.hpp>
#include <iostream>

namespace fs = boost::filesystem;

int main(int argc, char* argv[])
{
    fs::path p(fs::current_path());

    if (argc > 1)
        p = fs::system_complete(argv[1]);
    else
        std::cout << "\nusage:   simple_ls [path]" << std::endl;

    unsigned long file_count = 0;
    unsigned long dir_count = 0;
    unsigned long other_count = 0;
    unsigned long err_count = 0;

    if (!fs::exists(p))
    {
        std::cout << "\nNot found: " << p << std::endl;
        return 1;
    }

    if (fs::is_directory(p))
    {
        std::cout << "\nIn directory: " << p << "\n\n";
        fs::directory_iterator end_iter;
        for (fs::directory_iterator dir_itr(p);
             dir_itr != end_iter;
             ++dir_itr)
        {
            try
            {
                if (fs::is_directory(dir_itr->status()))
                {
                    ++dir_count;
                    std::cout << dir_itr->path().filename() << " [directory]\n";
                }
                else if (fs::is_regular_file(dir_itr->status()))
                {
                    ++file_count;
                    std::cout << dir_itr->path().filename() << "\n";
                }
                else
                {
                    ++other_count;
                    std::cout << dir_itr->path().filename() << " [other]\n";
                }
            }
            catch (const std::exception& ex)
            {
                ++err_count;
                std::cout << dir_itr->path().filename() << " " << ex.what() << std::endl;
            }
        }
        std::cout << "\n"
                  << file_count << " files\n"
                  << dir_count << " directories\n"
                  << other_count << " others\n"
                  << err_count << " errors\n";
    }
    else // must be a file
    {
        std::cout << "\nFound: " << p << "\n";
    }

    return 0;
}