path: libretro-bsnes-mercury_094+git20220807-8/nall/compositor.hpp
  pclose(fp);
  fp = popen("pidof xfwm4", "r");
  if(fp && fgets(buffer, sizeof buffer, fp)) result = Compositor::Xfwm4;
  pclose(fp);


path: libretro-bsnes-mercury_094+git20220807-8/nall/compositor.hpp
  char buffer[512];
  fp = popen("pidof metacity", "r");
  if(fp && fgets(buffer, sizeof buffer, fp)) result = Compositor::Metacity;
  pclose(fp);