Function main

Source/Tools/pidof/pidof.cpp:114–336

std::vector<PIDInfo> PIDs;

int main(int argc, char** argv) {
  Config::LoadOptions(argc, argv);

  // Iterate over all pids, storing the data for investigating afterwards.
  for (const auto& Entry : std::filesystem::directory_iterator("/proc/")) {
    // If not a directory then skip.
    if (!Entry.is_directory()) {
      continue;
    }

    auto CMDLinePath = Entry.path() / "cmdline";
    auto StatusPath = Entry.path() / "status";
    auto ExePath = Entry.path() / "exe";

    // If cmdline doesn't exist then skip.
    if (!std::filesystem::exists(CMDLinePath)) {
      continue;
    }

    auto Filename = Entry.path().filename().string();
    int64_t pid;
    auto ConvResult = std::from_chars(Filename.data(), Filename.data() + Filename.size(), pid, 10);

    // If the filename couldn't be converted to a PID then skip.
    // Happens with folders like `self` and a few other folders in this directory.
    if (ConvResult.ec == std::errc::invalid_argument) {
      continue;
    }

    std::ostringstream CMDLineData;
    {
      std::ifstream fs(CMDLinePath, std::ios_base::in | std::ios_base::binary);

      if (!fs.is_open()) {
        continue;
      }

      CMDLineData << fs.rdbuf();

      // If cmdline was empty then skip.
      if (CMDLineData.str().empty()) {
        continue;
      }
    }

    std::error_code ec;
    std::string exe_link = std::filesystem::read_symlink(ExePath, ec);

    // Couldn't read exe path? skip.
    if (ec) {
      continue;
    }

    // Read state
    char State {};

    {
      std::ifstream fs(StatusPath, std::ios_base::in | std::ios_base::binary);