ScBasicAdminPage_CheckSecurityPermission.aspx

<script runat="server">
  /// <summary>
  /// Page Load event handler.
  /// </summary>
  protected override void OnLoad(EventArgs e)
  {
      base.OnLoad(e);
      CheckSecurityPermission("/sitecore/admin/ScBasicAdminPage.aspx{0}");
      InitControls();
  }

  /// <summary>
  /// Checks if the current user has the appropriate permissions to access the admin page. If not user is redirected to the login page.
  /// </summary>
  /// <param name="adminPagePath">The admin page path to which the user gets redirected after successful login.</param>
  protected void CheckSecurityPermission(string adminPagePath)
  {
      if (Sitecore.Context.User.IsAdministrator)
      {
          return;
      }

      SiteContext site = Sitecore.Context.Site;
      string url = (site != null) ? site.LoginPage : string.Empty;
      string pageUrl = string.Format(CultureInfo.InvariantCulture, adminPagePath, string.IsNullOrEmpty(Request.QueryString.ToString()) ? string.Empty : "?" + Request.QueryString);
      url += "?returnUrl=" + Server.UrlEncode(pageUrl);
      if (url.Length > 0)
      {
          Response.Redirect(url, true);
      }
  }
</script>