--- a/functions.php	Tue Sep 23 23:26:15 2008 -0400
+++ b/functions.php	Tue Sep 23 23:26:18 2008 -0400
@@ -221,6 +221,11 @@
 {
   global $httpd;
   static $smarty = array();
+  if ( $theme_id === '__free__' )
+  {
+    $smarty = array();
+    return false;
+  }
   if ( !isset($smarty[$theme_id]) )
   {
     $smarty[$theme_id] = new Smarty();
@@ -233,3 +238,61 @@
   }
   return $smarty[$theme_id];
 }
+
+/**
+ * Implementation of the "which" command in native PHP.
+ * @param string command
+ * @return string path to executable, or false on failure
+ */
+
+function which($executable)
+{
+  $path = ( isset($_ENV['PATH']) ) ? $_ENV['PATH'] : ( isset($_SERVER['PATH']) ? $_SERVER['PATH'] : false );
+  if ( !$path )
+    // couldn't get OS's PATH
+    return false;
+    
+  $win32 = ( PHP_OS == 'WINNT' || PHP_OS == 'WIN32' );
+  $extensions = $win32 ? array('.exe', '.com', '.bat') : array('');
+  $separator = $win32 ? ';' : ':';
+  $paths = explode($separator, $path);
+  foreach ( $paths as $dir )
+  {
+    foreach ( $extensions as $ext )
+    {
+      $fullpath = "$dir/{$executable}{$ext}";
+      if ( file_exists($fullpath) && is_executable($fullpath) )
+      {
+        return $fullpath;
+      }
+    }
+  }
+  return false;
+}
+
+/**
+ * Reload the config.
+ */
+
+function grey_reload_config()
+{
+  global $httpd;
+  status('reloading the config');
+  
+  if ( file_exists('./greyhound-config.php') )
+  {
+    require('./greyhound-config.php');
+  }
+  else
+  {
+    // ignore this, it allows using a different config file when a Mercurial repository
+    // exists in Greyhound's root directory (to allow the devs to have their own config
+    // separate from the default)
+    
+    if ( @is_dir(GREY_ROOT . '/.hg') )
+      require(GREY_ROOT . '/config.dev.php');
+    else
+      require(GREY_ROOT . '/config.php');
+  }
+}
+