merge mainline into backtrace

grub-core/commands/handler.c

@@ -0,0 +1,115 @@
+/* handler.c - commands to list or select handlers */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/dl.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+#include <grub/term.h>
+#include <grub/handler.h>
+#include <grub/command.h>
+
+static grub_err_t
+grub_cmd_handler (struct grub_command *cmd,
+		  int argc, char **args)
+{
+  char *class_name;
+  void *curr_item = 0;
+  grub_handler_class_t head;
+
+  auto int list_item (grub_named_list_t item);
+  int list_item (grub_named_list_t item)
+    {
+      if (item == curr_item)
+	grub_putchar ('*');
+
+      grub_printf ("%s\n", item->name);
+
+      return 0;
+    }
+
+  class_name = (grub_strcmp (cmd->name, "handler")) ? (char *) cmd->name : 0;
+
+  head = grub_handler_class_list;
+  if ((argc == 0) && (class_name == 0))
+    {
+      grub_list_iterate (GRUB_AS_LIST (head), (grub_list_hook_t) list_item);
+    }
+  else
+    {
+      grub_handler_class_t class;
+
+      if (class_name == 0)
+	{
+	  class_name = args[0];
+	  argc--;
+	  args++;
+	}
+
+      class = grub_named_list_find (GRUB_AS_NAMED_LIST (head), class_name);
+      if (! class)
+	return grub_error (GRUB_ERR_FILE_NOT_FOUND, "class not found");
+
+      if (argc == 0)
+	{
+	  curr_item = class->cur_handler;
+	  grub_list_iterate (GRUB_AS_LIST (class->handler_list),
+			     (grub_list_hook_t) list_item);
+	}
+      else
+	{
+	  grub_handler_t handler;
+
+	  handler =
+	    grub_named_list_find (GRUB_AS_NAMED_LIST (class->handler_list),
+				  args[0]);
+
+	  if (! handler)
+	    return grub_error (GRUB_ERR_FILE_NOT_FOUND, "handler not found");
+
+	  grub_handler_set_current (class, handler);
+	}
+    }
+
+  return 0;
+}
+
+static grub_command_t cmd_handler, cmd_terminal_input, cmd_terminal_output;
+
+GRUB_MOD_INIT(handler)
+{
+  cmd_handler =
+    grub_register_command ("handler", grub_cmd_handler,
+			   "[class [handler]]",
+			   "List or select a handler.");
+  cmd_terminal_input =
+    grub_register_command ("terminal_input", grub_cmd_handler,
+			   "[handler]",
+			   "List or select an input terminal.");
+  cmd_terminal_output =
+    grub_register_command ("terminal_output", grub_cmd_handler,
+			   "[handler]",
+			   "List or select an output terminal.");
+}
+
+GRUB_MOD_FINI(handler)
+{
+  grub_unregister_command (cmd_handler);
+  grub_unregister_command (cmd_terminal_input);
+  grub_unregister_command (cmd_terminal_output);
+}