Introduction

udevw is a header-only libudev wrapper written in modern C++. It covers all of libudev with the exception of those functions that are marked as deprecated in the most recent version of the library.

In general, udevw mirrors the libudev API quite closely, with list handling being the one major exception. Wrapper equivalents of the udev_*_get_*_list_entry family of functions, which return C-style linked lists, instead return STL containers.

Example Code

#include <iostream>

#include <udevw.hpp>

int main() {
  auto udev = udevw::Udev::create();
  auto enumerate = udevw::Enumerate::create(udev);

  enumerate.add_match_subsystem("input");
  auto devices_list = enumerate.scan_devices();

  for (const auto &device_entry : devices_list) {
    auto device = udevw::Device::create_from_syspath(udev, device_entry.name);
    auto syspath = device.get_syspath();
    if (syspath)
      std::cout << *syspath << std::endl;
  }

  auto monitor = udevw::Monitor::create_from_netlink(udev, "udev");
  monitor.filter_add_match_subsystem("input"); // devtype = nullptr implied
  monitor.enable_receiving();

  int fd = monitor.get_fd();
  for (;;) {
    fd_set fds;
    FD_ZERO(&fds);
    FD_SET(fd, &fds);

    if (select(fd +1, &fds, nullptr, nullptr, nullptr) > 0 && FD_ISSET(fd, &fds)) {
      auto device = monitor.receive_device();

      auto syspath = device.get_syspath();
      if (!syspath)
        continue;

      auto action = device.get_action();
      if (!action)
        continue;

      if (*action == "add")
        std::cout << "[+] " << *syspath << std::endl;
      else if (*action == "remove")
        std::cout << "[-] " << *syspath << std::endl;
    }
  }
}