1 files changed, 105 insertions, 0 deletions
diff --git a/util/grub-mkrelpath.c b/util/grub-mkrelpath.c
new file mode 100644
index 0000000..47a241a
--- /dev/null
+++ b/util/grub-mkrelpath.c
@@ -0,0 +1,105 @@
+/* grub-mkrelpath.c - make a system path relative to its root */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009,2010 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 <config.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <grub/util/misc.h>
+#include <grub/emu/misc.h>
+#include <grub/i18n.h>
+
+#define _GNU_SOURCE	1
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#pragma GCC diagnostic ignored "-Wmissing-declarations"
+#include <argp.h>
+#pragma GCC diagnostic error "-Wmissing-prototypes"
+#pragma GCC diagnostic error "-Wmissing-declarations"
+
+#include "progname.h"
+
+struct arguments
+{
+  char *pathname;
+};
+
+static struct argp_option options[] = {
+  { 0, 0, 0, 0, 0, 0 }
+};
+
+static error_t
+argp_parser (int key, char *arg, struct argp_state *state)
+{
+  /* Get the input argument from argp_parse, which we
+     know is a pointer to our arguments structure. */
+  struct arguments *arguments = state->input;
+
+  switch (key)
+    {
+    case ARGP_KEY_ARG:
+      if (state->arg_num == 0)
+	arguments->pathname = xstrdup (arg);
+      else
+	{
+	  /* Too many arguments. */
+	  fprintf (stderr, _("Unknown extra argument `%s'."), arg);
+	  fprintf (stderr, "\n");
+	  argp_usage (state);
+	}
+      break;
+    case ARGP_KEY_NO_ARGS:
+      fprintf (stderr, "%s", _("No path is specified.\n"));
+      argp_usage (state);
+      exit (1);
+      break;
+    default:
+      return ARGP_ERR_UNKNOWN;
+    }
+  return 0;
+}
+
+static struct argp argp = {
+  options, argp_parser, N_("PATH"),
+  N_("Transform a system filename into GRUB one."),
+  NULL, NULL, NULL
+};
+
+int
+main (int argc, char *argv[])
+{
+  char *relpath;
+  struct arguments arguments;
+
+  grub_util_host_init (&argc, &argv);
+
+  memset (&arguments, 0, sizeof (struct arguments));
+
+  /* Check for options.  */
+  if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
+    {
+      fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
+      exit(1);
+    }
+
+  relpath = grub_make_system_path_relative_to_its_root (arguments.pathname);
+  printf ("%s\n", relpath);
+  free (relpath);
+
+  return 0;
+}