notes.md

Pathmatch Notes

std::filesystem Functions

• fs::is_directory (std::string(d))
• fs::is_symlink (fs::path s)
• fs::current_path()
  • fs::exists (fs::path p) (1)
  • fs::path.root_name() (C:)
  • fs::path.root_path() (C:\)
  • fs::path.relative_path() (Windows\system.ini)
  • fs::path.parent_path() (C:\Windows)
  • fs::path.filename() (system.ini)
  • fs::path.stem() (system)
  • fs::path.extension() (.ini)
  • p /= "subdir" (Append subdir to path with separator)
  • p += "subdir" (Concatenate subdir to path without separator)

Components

- The `path` object
- `directory_entry`
- Directory iterators
- Misc support functions

Directory Iteration

void DisplayDirTree(const fs::path& pathToShow, int level)
{
    if (fs::exists(pathToShow) && fs::is_directory(pathToShow))
    {
        auto lead = std::string(level * 3, ' ');

        // Note: directories '.' and '..' are skipped in the iterator.
        // See also recursive_directory_iterator.

        for (const auto& entry : fs::directory_iterator(pathToShow))
        {
            // entry is a std::path. It has .path(), .status()

            auto filename = entry.path().filename();
            if (fs::is_directory(entry.status()))
            {
                cout << lead << "[+] " << filename << "\n";
                DisplayDirTree(entry, level + 1);
                cout << "\n";
            }
            else if (fs::is_regular_file(entry.status()))
                DisplayFileInfo(entry, lead, filename);
            else
                cout << lead << " [?]" << filename << "\n";
        }
    }
}