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-rw-r--r--util/grub-mkrelpath.c105
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;
+}