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grub/util/i386/pc/grub-setup.c
okuji 4b13b216f4 2004-04-04 Yoshinori K. Okuji <okuji@enbug.org> 
All symbols prefixed with PUPA_ and pupa_ are renamed to GRUB_
	and grub_, respectively. Because the conversion is trivial and
	mechanical, I omit the details here. Please refer to the CVS
	if you need more information.
2004-04-04 13:46:03 +00:00

643 lines
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/* grub-setup.c - make GRUB usable */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <grub/types.h>
#include <grub/util/misc.h>
#include <grub/device.h>
#include <grub/disk.h>
#include <grub/file.h>
#include <grub/fs.h>
#include <grub/machine/partition.h>
#include <grub/machine/util/biosdisk.h>
#include <grub/machine/boot.h>
#include <grub/machine/kernel.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <grub/util/getroot.h>
#define _GNU_SOURCE 1
#include <getopt.h>
#define DEFAULT_BOOT_FILE "boot.img"
#define DEFAULT_CORE_FILE "core.img"
#ifdef __NetBSD__
/* NetBSD uses /boot for its boot block. */
# define DEFAULT_DIRECTORY "/grub"
#else
# define DEFAULT_DIRECTORY "/boot/grub"
#endif
#define DEFAULT_DEVICE_MAP DEFAULT_DIRECTORY "/device.map"
/* This is the blocklist used in the diskboot image. */
struct boot_blocklist
{
grub_uint32_t start;
grub_uint16_t len;
grub_uint16_t segment;
} __attribute__ ((packed));
void
grub_putchar (int c)
{
putchar (c);
}
void
grub_refresh (void)
{
}
static void
setup (const char *prefix, const char *dir,
const char *boot_file, const char *core_file,
const char *root, const char *dest)
{
char *boot_path, *core_path;
char *boot_img, *core_img;
size_t boot_size, core_size;
grub_uint16_t core_sectors;
grub_device_t root_dev, dest_dev;
grub_uint8_t *boot_drive;
grub_uint32_t *kernel_sector;
struct boot_blocklist *first_block, *block;
grub_int32_t *install_dos_part, *install_bsd_part;
char *install_prefix;
char *tmp_img;
int i;
unsigned long first_sector;
grub_uint16_t current_segment
= GRUB_BOOT_MACHINE_KERNEL_SEG + (GRUB_DISK_SECTOR_SIZE >> 4);
grub_uint16_t last_length = GRUB_DISK_SECTOR_SIZE;
grub_file_t file;
FILE *fp;
unsigned long first_start = ~0UL;
auto void save_first_sector (unsigned long sector, unsigned offset,
unsigned length);
auto void save_blocklists (unsigned long sector, unsigned offset,
unsigned length);
auto int find_first_partition_start (const grub_partition_t p);
int find_first_partition_start (const grub_partition_t p)
{
if (! grub_partition_is_empty (p->dos_type)
&& ! grub_partition_is_bsd (p->dos_type)
&& first_start > p->start)
first_start = p->start;
return 0;
}
void save_first_sector (unsigned long sector, unsigned offset,
unsigned length)
{
grub_util_info ("the fist sector is <%lu,%u,%u>",
sector, offset, length);
if (offset != 0 || length != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("The first sector of the core file is not sector-aligned");
first_sector = sector;
}
void save_blocklists (unsigned long sector, unsigned offset, unsigned length)
{
struct boot_blocklist *prev = block + 1;
grub_util_info ("saving <%lu,%u,%u> with the segment 0x%x",
sector, offset, length, (unsigned) current_segment);
if (offset != 0 || last_length != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("Non-sector-aligned data is found in the core file");
if (block != first_block
&& (grub_le_to_cpu32 (prev->start)
+ grub_le_to_cpu16 (prev->len)) == sector)
prev->len = grub_cpu_to_le16 (grub_le_to_cpu16 (prev->len) + 1);
else
{
block->start = grub_cpu_to_le32 (sector);
block->len = grub_cpu_to_le16 (1);
block->segment = grub_cpu_to_le16 (current_segment);
block--;
if (block->len)
grub_util_error ("The sectors of the core file are too fragmented");
}
last_length = length;
current_segment += GRUB_DISK_SECTOR_SIZE >> 4;
}
/* Read the boot image by the OS service. */
boot_path = grub_util_get_path (dir, boot_file);
boot_size = grub_util_get_image_size (boot_path);
if (boot_size != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("The size of `%s' is not %d",
boot_path, GRUB_DISK_SECTOR_SIZE);
boot_img = grub_util_read_image (boot_path);
free (boot_path);
/* Set the addresses of BOOT_DRIVE and KERNEL_SECTOR. */
boot_drive = (grub_uint8_t *) (boot_img + GRUB_BOOT_MACHINE_BOOT_DRIVE);
kernel_sector = (grub_uint32_t *) (boot_img
+ GRUB_BOOT_MACHINE_KERNEL_SECTOR);
core_path = grub_util_get_path (dir, core_file);
core_size = grub_util_get_image_size (core_path);
core_sectors = ((core_size + GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS);
if (core_size < GRUB_DISK_SECTOR_SIZE)
grub_util_error ("The size of `%s' is too small", core_path);
else if (core_size > 0xFFFF * GRUB_DISK_SECTOR_SIZE)
grub_util_error ("The size of `%s' is too large", core_path);
core_img = grub_util_read_image (core_path);
free (core_path);
/* Have FIRST_BLOCK to point to the first blocklist. */
first_block = (struct boot_blocklist *) (core_img
+ GRUB_DISK_SECTOR_SIZE
- sizeof (*block));
install_dos_part = (grub_int32_t *) (core_img + GRUB_DISK_SECTOR_SIZE
+ GRUB_KERNEL_MACHINE_INSTALL_DOS_PART);
install_bsd_part = (grub_int32_t *) (core_img + GRUB_DISK_SECTOR_SIZE
+ GRUB_KERNEL_MACHINE_INSTALL_BSD_PART);
install_prefix = (core_img + GRUB_DISK_SECTOR_SIZE
+ GRUB_KERNEL_MACHINE_PREFIX);
/* Open the root device and the destination device. */
root_dev = grub_device_open (root);
if (! root_dev)
grub_util_error ("%s", grub_errmsg);
dest_dev = grub_device_open (dest);
if (! dest_dev)
grub_util_error ("%s", grub_errmsg);
grub_util_info ("setting the root device to `%s'", root);
if (grub_device_set_root (root) != GRUB_ERR_NONE)
grub_util_error ("%s", grub_errmsg);
/* Read the original sector from the disk. */
tmp_img = xmalloc (GRUB_DISK_SECTOR_SIZE);
if (grub_disk_read (dest_dev->disk, 0, 0, GRUB_DISK_SECTOR_SIZE, tmp_img))
grub_util_error ("%s", grub_errmsg);
/* Copy the possible DOS BPB. */
memcpy (boot_img + GRUB_BOOT_MACHINE_BPB_START,
tmp_img + GRUB_BOOT_MACHINE_BPB_START,
GRUB_BOOT_MACHINE_BPB_END - GRUB_BOOT_MACHINE_BPB_START);
/* Copy the possible partition table. */
if (dest_dev->disk->has_partitions)
memcpy (boot_img + GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC,
tmp_img + GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC,
GRUB_BOOT_MACHINE_PART_END - GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC);
free (tmp_img);
/* If the destination device can have partitions and it is the MBR,
try to embed the core image into after the MBR. */
if (dest_dev->disk->has_partitions && ! dest_dev->disk->partition)
{
grub_partition_iterate (dest_dev->disk, find_first_partition_start);
/* If there is enough space... */
if ((unsigned long) core_sectors + 1 <= first_start)
{
grub_util_info ("will embed the core image into after the MBR");
/* The first blocklist contains the whole sectors. */
first_block->start = grub_cpu_to_le32 (2);
first_block->len = grub_cpu_to_le16 (core_sectors - 1);
first_block->segment
= grub_cpu_to_le16 (GRUB_BOOT_MACHINE_KERNEL_SEG
+ (GRUB_DISK_SECTOR_SIZE >> 4));
/* Make sure that the second blocklist is a terminator. */
block = first_block - 1;
block->start = 0;
block->len = 0;
block->segment = 0;
/* Embed information about the installed location. */
if (root_dev->disk->partition)
{
*install_dos_part
= grub_cpu_to_le32 (root_dev->disk->partition->dos_part);
*install_bsd_part
= grub_cpu_to_le32 (root_dev->disk->partition->bsd_part);
}
else
*install_dos_part = *install_bsd_part = grub_cpu_to_le32 (-1);
strcpy (install_prefix, prefix);
/* Write the core image onto the disk. */
if (grub_disk_write (dest_dev->disk, 1, 0, core_size, core_img))
grub_util_error ("%s", grub_errmsg);
/* The boot image and the core image are on the same drive,
so there is no need to specify the boot drive explicitly. */
*boot_drive = 0xff;
*kernel_sector = grub_cpu_to_le32 (1);
/* Write the boot image onto the disk. */
if (grub_disk_write (dest_dev->disk, 0, 0, GRUB_DISK_SECTOR_SIZE,
boot_img))
grub_util_error ("%s", grub_errmsg);
goto finish;
}
}
/* The core image must be put on a filesystem unfortunately. */
grub_util_info ("will leave the core image on the filesystem");
/* Make sure that GRUB reads the identical image as the OS. */
tmp_img = xmalloc (core_size);
core_path = grub_util_get_path (prefix, core_file);
/* It is a Good Thing to sync two times. */
sync ();
sync ();
#define MAX_TRIES 5
for (i = 0; i < MAX_TRIES; i++)
{
grub_util_info ("attempting to read the core image `%s' from GRUB%s",
core_path, (i == 0) ? "" : " again");
grub_disk_cache_invalidate_all ();
file = grub_file_open (core_path);
if (file)
{
if (grub_file_size (file) != (grub_ssize_t) core_size)
grub_util_info ("succeeded in opening the core image but the size is different (%d != %d)",
(int) grub_file_size (file), (int) core_size);
else if (grub_file_read (file, tmp_img, core_size)
!= (grub_ssize_t) core_size)
grub_util_info ("succeeded in opening the core image but cannot read %d bytes",
(int) core_size);
else if (memcmp (core_img, tmp_img, core_size) != 0)
{
#if 0
FILE *dump;
FILE *dump2;
dump = fopen ("dump.img", "wb");
if (dump)
{
fwrite (tmp_img, 1, core_size, dump);
fclose (dump);
}
dump2 = fopen ("dump2.img", "wb");
if (dump2)
{
fwrite (core_img, 1, core_size, dump2);
fclose (dump2);
}
#endif
grub_util_info ("succeeded in opening the core image but the data is different");
}
else
{
grub_file_close (file);
break;
}
grub_file_close (file);
}
else
grub_util_info ("couldn't open the core image");
if (grub_errno)
grub_util_info ("error message = %s", grub_errmsg);
grub_errno = GRUB_ERR_NONE;
sync ();
sleep (1);
}
if (i == MAX_TRIES)
grub_util_error ("Cannot read `%s' correctly", core_path);
/* Clean out the blocklists. */
block = first_block;
while (block->len)
{
block->start = 0;
block->len = 0;
block->segment = 0;
block--;
if ((char *) block <= core_img)
grub_util_error ("No terminator in the core image");
}
/* Now read the core image to determine where the sectors are. */
file = grub_file_open (core_path);
if (! file)
grub_util_error ("%s", grub_errmsg);
file->read_hook = save_first_sector;
if (grub_file_read (file, tmp_img, GRUB_DISK_SECTOR_SIZE)
!= GRUB_DISK_SECTOR_SIZE)
grub_util_error ("Failed to read the first sector of the core image");
block = first_block;
file->read_hook = save_blocklists;
if (grub_file_read (file, tmp_img, core_size - GRUB_DISK_SECTOR_SIZE)
!= (grub_ssize_t) core_size - GRUB_DISK_SECTOR_SIZE)
grub_util_error ("Failed to read the rest sectors of the core image");
free (core_path);
free (tmp_img);
*kernel_sector = grub_cpu_to_le32 (first_sector);
/* If the destination device is different from the root device,
it is necessary to embed the boot drive explicitly. */
if (root_dev->disk->id != dest_dev->disk->id)
*boot_drive = (grub_uint8_t) root_dev->disk->id;
else
*boot_drive = 0xFF;
/* Embed information about the installed location. */
if (root_dev->disk->partition)
{
*install_dos_part
= grub_cpu_to_le32 (root_dev->disk->partition->dos_part);
*install_bsd_part
= grub_cpu_to_le32 (root_dev->disk->partition->bsd_part);
}
else
*install_dos_part = *install_bsd_part = grub_cpu_to_le32 (-1);
strcpy (install_prefix, prefix);
/* Write the first two sectors of the core image onto the disk. */
core_path = grub_util_get_path (dir, core_file);
grub_util_info ("opening the core image `%s'", core_path);
fp = fopen (core_path, "r+b");
if (! fp)
grub_util_error ("Cannot open `%s'", core_path);
grub_util_write_image (core_img, GRUB_DISK_SECTOR_SIZE * 2, fp);
fclose (fp);
free (core_path);
/* Write the boot image onto the disk. */
if (grub_disk_write (dest_dev->disk, 0, 0, GRUB_DISK_SECTOR_SIZE, boot_img))
grub_util_error ("%s", grub_errmsg);
finish:
/* Sync is a Good Thing. */
sync ();
free (core_img);
free (boot_img);
grub_device_close (dest_dev);
grub_device_close (root_dev);
}
static struct option options[] =
{
{"boot-image", required_argument, 0, 'b'},
{"core-image", required_argument, 0, 'c'},
{"directory", required_argument, 0, 'd'},
{"device-map", required_argument, 0, 'm'},
{"root-device", required_argument, 0, 'r'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"verbose", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
static void
usage (int status)
{
if (status)
fprintf (stderr, "Try ``grub-setup --help'' for more information.\n");
else
printf ("\
Usage: grub-setup [OPTION]... DEVICE\n\
\n\
Set up images to boot from DEVICE.\n\
DEVICE must be a GRUB device (e.g. ``(hd0,0)'').\n\
\n\
-b, --boot-file=FILE use FILE as the boot file [default=%s]\n\
-c, --core-file=FILE use FILE as the core file [default=%s]\n\
-d, --directory=DIR use GRUB files in the directory DIR [default=%s]\n\
-m, --device-map=FILE use FILE as the device map [default=%s]\n\
-r, --root-device=DEV use DEV as the root device [default=guessed]\n\
-h, --help display this message and exit\n\
-V, --version print version information and exit\n\
-v, --verbose print verbose messages\n\
\n\
Report bugs to <%s>.\n\
",
DEFAULT_BOOT_FILE, DEFAULT_CORE_FILE, DEFAULT_DIRECTORY,
DEFAULT_DEVICE_MAP, PACKAGE_BUGREPORT);
exit (status);
}
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 *boot_file = 0;
char *core_file = 0;
char *dir = 0;
char *dev_map = 0;
char *root_dev = 0;
char *prefix;
char *dest_dev;
progname = "grub-setup";
/* Check for options. */
while (1)
{
int c = getopt_long (argc, argv, "b:c:d:m:r:hVv", options, 0);
if (c == -1)
break;
else
switch (c)
{
case 'b':
if (boot_file)
free (boot_file);
boot_file = xstrdup (optarg);
break;
case 'c':
if (core_file)
free (core_file);
core_file = xstrdup (optarg);
break;
case 'd':
if (dir)
free (dir);
dir = xstrdup (optarg);
break;
case 'm':
if (dev_map)
free (dev_map);
dev_map = xstrdup (optarg);
break;
case 'r':
if (root_dev)
free (root_dev);
root_dev = xstrdup (optarg);
break;
case 'h':
usage (0);
break;
case 'V':
printf ("grub-setup (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION);
return 0;
case 'v':
verbosity++;
break;
default:
usage (1);
break;
}
}
/* Obtain DEST_DEV. */
if (optind >= argc)
{
fprintf (stderr, "No device is specified.\n");
usage (1);
}
if (optind + 1 != argc)
{
fprintf (stderr, "Unknown extra argument `%s'.\n", argv[optind + 1]);
usage (1);
}
dest_dev = get_device_name (argv[optind]);
if (! dest_dev)
{
fprintf (stderr, "Invalid device `%s'.\n", argv[optind]);
usage (1);
}
prefix = grub_get_prefix (dir ? : DEFAULT_DIRECTORY);
/* Initialize the emulated biosdisk driver. */
grub_util_biosdisk_init (dev_map ? : DEFAULT_DEVICE_MAP);
/* Initialize filesystems. */
grub_fat_init ();
grub_ext2_init ();
if (root_dev)
{
char *tmp = get_device_name (root_dev);
if (! tmp)
grub_util_error ("Invalid root device `%s'", root_dev);
tmp = xstrdup (tmp);
free (root_dev);
root_dev = tmp;
}
else
{
root_dev = grub_guess_root_device (dir ? : DEFAULT_DIRECTORY);
if (! root_dev)
{
grub_util_info ("guessing the root device failed, because of `%s'",
grub_errmsg);
grub_util_error ("Cannot guess the root device. Specify the option ``--root-device''.");
}
}
/* Do the real work. */
setup (prefix,
dir ? : DEFAULT_DIRECTORY,
boot_file ? : DEFAULT_BOOT_FILE,
core_file ? : DEFAULT_CORE_FILE,
root_dev, dest_dev);
/* Free resources. */
grub_ext2_fini ();
grub_fat_fini ();
grub_util_biosdisk_fini ();
free (boot_file);
free (core_file);
free (prefix);
free (dir);
free (dev_map);
free (root_dev);
free (prefix);
return 0;
}
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