关于linux:Linux中获取当前进程的绝对路径

通过readlink的形式获取。

bool GetExePath(std::string &path)
{
  std::string exe_path(PATH_MAX, std::string::value_type());
  auto exe_path_len = readlink("/proc/self/exe", &exe_path[0], exe_path.size());
  if (exe_path_len < 0) {
      std::cerr << "readlink failed!, exe_path_len < 0"<< std::endl;
      return false;
  } else if (static_cast<size_t>(exe_path_len) >= exe_path.size()) {
      std::cerr << "readlink failed!, exe_path_len >= exe_path.size()"<< std::endl;
      return false;
  }

  exe_path.resize(exe_path_len);
  auto pos = exe_path.rfind('/');
  if (pos == std::string::npos) {
      std::cerr << "exe_path.rfind fail!, exe_path.rfind = npos"<< std::endl;
      return false;
  }
  path = exe_path.substr(0, pos);
  return true;
}