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grub2/util/grub-setup.c

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/* grub-setup.c - make GRUB usable */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011 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>
#define _GNU_SOURCE 1
#include <string.h>
#include <grub/types.h>
#include <grub/emu/misc.h>
#include <grub/util/misc.h>
#include <grub/device.h>
#include <grub/disk.h>
#include <grub/file.h>
#include <grub/fs.h>
#include <grub/partition.h>
#include <grub/env.h>
#include <grub/emu/hostdisk.h>
#include <grub/term.h>
#include <grub/i18n.h>
#include <grub/crypto.h>
#include <grub/emu/getroot.h>
#include <grub/util/install.h>
#include <argp.h>
/* On SPARC this program fills in various fields inside of the 'boot' and 'core'
* image files.
*
* The 'boot' image needs to know the OBP path name of the root
* device. It also needs to know the initial block number of
* 'core' (which is 'diskboot' concatenated with 'kernel' and
* all the modules, this is created by grub-mkimage). This resulting
* 'boot' image is 512 bytes in size and is placed in the second block
* of a partition.
*
* The initial 'diskboot' block acts as a loader for the actual GRUB
* kernel. It contains the loading code and then a block list.
*
* The block list of 'core' starts at the end of the 'diskboot' image
* and works it's way backwards towards the end of the code of 'diskboot'.
*
* We patch up the images with the necessary values and write out the
* result.
*/
#define DEFAULT_BOOT_FILE "boot.img"
#define DEFAULT_CORE_FILE "core.img"
/* Non-printable "keys" for arguments with no short form.
* See grub-core/gnulib/argp.h for details. */
enum {
NO_RS_CODES_KEY = 0x100,
};
static struct argp_option options[] = {
{"boot-image", 'b', N_("FILE"), 0,
N_("use FILE as the boot image [default=%s]"), 0},
{"core-image", 'c', N_("FILE"), 0,
N_("use FILE as the core image [default=%s]"), 0},
{"directory", 'd', N_("DIR"), 0,
N_("use GRUB files in the directory DIR [default=%s]"), 0},
{"device-map", 'm', N_("FILE"), 0,
N_("use FILE as the device map [default=%s]"), 0},
{"force", 'f', 0, 0,
N_("install even if problems are detected"), 0},
{"skip-fs-probe",'s',0, 0,
N_("do not probe for filesystems in DEVICE"), 0},
{"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
{"allow-floppy", 'a', 0, 0,
/* TRANSLATORS: The potential breakage isn't limited to floppies but it's
likely to make the install unbootable from HDD. */
N_("make the drive also bootable as floppy (default for fdX devices). May break on some BIOSes."), 0},
{"no-rs-codes", NO_RS_CODES_KEY, 0, 0,
N_("Do not apply any reed-solomon codes when embedding core.img. "
"This option is only available on x86 BIOS targets."), 0},
{ 0, 0, 0, 0, 0, 0 }
};
static char *
help_filter (int key, const char *text, void *input __attribute__ ((unused)))
{
switch (key)
{
case 'b':
return xasprintf (text, DEFAULT_BOOT_FILE);
case 'c':
return xasprintf (text, DEFAULT_CORE_FILE);
case 'd':
return xasprintf (text, DEFAULT_DIRECTORY);
case 'm':
return xasprintf (text, DEFAULT_DEVICE_MAP);
default:
return (char *) text;
}
}
struct arguments
{
char *boot_file;
char *core_file;
char *dir;
char *dev_map;
int force;
int fs_probe;
int allow_floppy;
char *device;
int add_rs_codes;
};
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 'a':
arguments->allow_floppy = 1;
break;
case 'b':
if (arguments->boot_file)
free (arguments->boot_file);
arguments->boot_file = xstrdup (arg);
break;
case 'c':
if (arguments->core_file)
free (arguments->core_file);
arguments->core_file = xstrdup (arg);
break;
case 'd':
if (arguments->dir)
free (arguments->dir);
arguments->dir = xstrdup (arg);
break;
case 'm':
if (arguments->dev_map)
free (arguments->dev_map);
arguments->dev_map = xstrdup (arg);
break;
case 'f':
arguments->force = 1;
break;
case 's':
arguments->fs_probe = 0;
break;
case 'v':
verbosity++;
break;
case NO_RS_CODES_KEY:
arguments->add_rs_codes = 0;
break;
case ARGP_KEY_ARG:
if (state->arg_num == 0)
arguments->device = 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 device is specified.\n"));
argp_usage (state);
exit (1);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = {
options, argp_parser, N_("DEVICE"),
"\n"N_("\
Set up images to boot from DEVICE.\n\
\n\
You should not normally run this program directly. Use grub-install instead.")
"\v"N_("\
DEVICE must be an OS device (e.g. /dev/sda)."),
NULL, help_filter, NULL
};
static char *
get_device_name (char *dev)
{
size_t len = strlen (dev);
if (dev[0] != '(' || dev[len - 1] != ')')
return 0;
dev[len - 1] = '\0';
return dev + 1;
}
int
main (int argc, char *argv[])
{
char *root_dev = NULL;
char *dest_dev = NULL;
struct arguments arguments;
grub_util_host_init (&argc, &argv);
/* Default option values. */
memset (&arguments, 0, sizeof (struct arguments));
arguments.fs_probe = 1;
arguments.add_rs_codes = 1;
/* Parse our arguments */
if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
{
fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
exit(1);
}
#ifdef GRUB_SETUP_SPARC64
arguments.force = 1;
#endif
if (verbosity > 1)
grub_env_set ("debug", "all");
/* Initialize the emulated biosdisk driver. */
grub_util_biosdisk_init (arguments.dev_map ? : DEFAULT_DEVICE_MAP);
/* Initialize all modules. */
grub_init_all ();
grub_gcry_init_all ();
grub_lvm_fini ();
grub_mdraid09_fini ();
grub_mdraid1x_fini ();
grub_diskfilter_fini ();
grub_diskfilter_init ();
grub_mdraid09_init ();
grub_mdraid1x_init ();
grub_lvm_init ();
dest_dev = get_device_name (arguments.device);
if (! dest_dev)
{
/* Possibly, the user specified an OS device file. */
dest_dev = grub_util_get_grub_dev (arguments.device);
if (! dest_dev)
{
char *program = xstrdup(program_name);
fprintf (stderr, _("Invalid device `%s'.\n"), arguments.device);
argp_help (&argp, stderr, ARGP_HELP_STD_USAGE, program);
free(program);
exit(1);
}
grub_util_info ("transformed OS device `%s' into GRUB device `%s'",
arguments.device, dest_dev);
}
else
{
/* For simplicity. */
dest_dev = xstrdup (dest_dev);
grub_util_info ("Using `%s' as GRUB device", dest_dev);
}
/* Do the real work. */
GRUB_SETUP_FUNC (arguments.dir ? : DEFAULT_DIRECTORY,
arguments.boot_file ? : DEFAULT_BOOT_FILE,
arguments.core_file ? : DEFAULT_CORE_FILE,
dest_dev, arguments.force,
arguments.fs_probe, arguments.allow_floppy,
arguments.add_rs_codes);
/* Free resources. */
grub_fini_all ();
grub_util_biosdisk_fini ();
free (arguments.boot_file);
free (arguments.core_file);
free (arguments.dir);
free (arguments.dev_map);
free (arguments.device);
free (root_dev);
free (dest_dev);
return 0;
}
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