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/* 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;
}
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