automake commit without merge history

grub-core/kern/rescue_parser.c

@@ -0,0 +1,88 @@
+/* rescue_parser.c - rescue mode parser  */
+/*
+ *  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/types.h>
+#include <grub/mm.h>
+#include <grub/env.h>
+#include <grub/parser.h>
+#include <grub/misc.h>
+#include <grub/command.h>
+
+static grub_err_t
+grub_rescue_parse_line (char *line, grub_reader_getline_t getline)
+{
+  char *name;
+  int n;
+  grub_command_t cmd;
+  char **args;
+
+  if (grub_parser_split_cmdline (line, getline, &n, &args) || n < 0)
+    return grub_errno;
+
+  if (n == 0)
+    return GRUB_ERR_NONE;
+
+  /* In case of an assignment set the environment accordingly
+     instead of calling a function.  */
+  if (n == 1 && grub_strchr (line, '='))
+    {
+      char *val = grub_strchr (args[0], '=');
+      val[0] = 0;
+      grub_env_set (args[0], val + 1);
+      val[0] = '=';
+      goto quit;
+    }
+
+  /* Get the command name.  */
+  name = args[0];
+
+  /* If nothing is specified, restart.  */
+  if (*name == '\0')
+    goto quit;
+
+  cmd = grub_command_find (name);
+  if (cmd)
+    {
+      (cmd->func) (cmd, n - 1, &args[1]);
+    }
+  else
+    {
+      grub_printf ("Unknown command `%s'\n", name);
+      if (grub_command_find ("help"))
+	grub_printf ("Try `help' for usage\n");
+    }
+
+ quit:
+  grub_free (args[0]);
+  grub_free (args);
+
+  return grub_errno;
+}
+
+static struct grub_parser grub_rescue_parser =
+  {
+    .name = "rescue",
+    .parse_line = grub_rescue_parse_line
+  };
+
+void
+grub_register_rescue_parser (void)
+{
+  grub_parser_register ("rescue", &grub_rescue_parser);
+}