function file_exists(path)
  local attr = lighty.stat(path)
  if (attr and attr["is_file"]) then
      return true
  else
      return false
  end
end

if not file_exists(lighty.env['physical.path']) then
    lighty.env["uri.path"] = "redmine-fastcgi.sock"
    lighty.env["physical.rel-path"] = lighty.env["uri.path"]
    lighty.env["physical.doc-root"] = "/tmp/"
    lighty.env["physical.path"] = lighty.env["physical.doc-root"] .. lighty.env["physical.rel-path"]
end