Function GetServerMountFolder

Source/Common/FEXServerClient.cpp:102–129

}

fextl::string GetServerMountFolder() {
  // We need a FEXServer mount directory that has some tricky requirements.
  // - We don't want to use `/tmp/` if possible.
  //   - systemd services use `PrivateTmp` feature to gives services their own tmp.
  //   - We will use this as a fallback path /only/.
  // - Can't be `[$XDG_DATA_HOME,$HOME]/.fex-emu/`
  //   - Might be mounted with a filesystem (sshfs) which can't handle mount points inside it.
  //
  // Directories it can be in:
  // - $XDG_RUNTIME_DIR if set
  //   - Is typically `/run/user/<UID>/`
  //   - systemd `PrivateTmp` feature doesn't touch this.
  //   - If this path doesn't exist then fallback to `/tmp/` as a last resort.
  //   - pressure-vessel explicitly creates an internal XDG_RUNTIME_DIR inside its chroot.
  //     - This is okay since pressure-vessel rbinds the FEX rootfs from the host to `/run/pressure-vessel/interpreter-root`.
  auto Folder = GetTempFolder();

  if (FEXCore::Config::FindContainer() == "pressure-vessel") {
    // In pressure-vessel the mount point changes location.
    // This is due to pressure-vesssel being a chroot environment.
    // It by default maps the host-filesystem to `/run/host/` so we need to redirect.
    // After pressure-vessel is fully set up it will set the `FEX_ROOTFS` environment variable,
    // which the FEXInterpreter will pick up on.
    Folder = "/run/host/" + Folder;
  }

  return Folder;
}

fextl::string GetServerSocketName() {
  FEX_CONFIG_OPT(ServerSocketPath, SERVERSOCKETPATH);