docs: function chownErOk (er) {
      if (!er)
        return true
  
      if (er.code === "ENOSYS")
        return true
  
      var nonroot = !process.getuid || process.getuid() !== 0
      if (nonroot) {
        if (er.code === "EINVAL" || er.code === "EPERM")
          return true
      }
  
      return false
    }