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grub/util/grub-probe.c
fzielcke b39f9d20a9 remove all trailing whitespace
2009-06-10 21:04:23 +00:00

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8.6 KiB
C
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/* grub-probe.c - probe device information for a given path */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2005,2006,2007,2008,2009 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 <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/partition.h>
#include <grub/pc_partition.h>
#include <grub/util/hostdisk.h>
#include <grub/util/getroot.h>
#include <grub/term.h>
#include <grub/env.h>
#include <grub_probe_init.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#define _GNU_SOURCE 1
#include <getopt.h>
enum {
PRINT_FS,
PRINT_FS_UUID,
PRINT_DRIVE,
PRINT_DEVICE,
PRINT_PARTMAP,
PRINT_ABSTRACTION,
};
int print = PRINT_FS;
static unsigned int argument_is_device = 0;
void
grub_putchar (int c)
{
putchar (c);
}
int
grub_getkey (void)
{
return -1;
}
struct grub_handler_class grub_term_input_class;
struct grub_handler_class grub_term_output_class;
void
grub_refresh (void)
{
fflush (stdout);
}
static void
probe_partmap (grub_disk_t disk)
{
char *name;
char *underscore;
if (disk->partition == NULL)
{
grub_util_info ("No partition map found for %s", disk->name);
return;
}
name = strdup (disk->partition->partmap->name);
if (! name)
grub_util_error ("Not enough memory");
underscore = strchr (name, '_');
if (! underscore)
grub_util_error ("Invalid partition map %s", name);
*underscore = '\0';
printf ("%s\n", name);
free (name);
}
static void
probe (const char *path, char *device_name)
{
char *drive_name = NULL;
char *grub_path = NULL;
char *filebuf_via_grub = NULL, *filebuf_via_sys = NULL;
int abstraction_type;
grub_device_t dev = NULL;
grub_fs_t fs;
if (path == NULL)
{
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
if (! grub_util_check_char_device (device_name))
grub_util_error ("%s is not a character device.\n", device_name);
#else
if (! grub_util_check_block_device (device_name))
grub_util_error ("%s is not a block device.\n", device_name);
#endif
}
else
device_name = grub_guess_root_device (path);
if (! device_name)
grub_util_error ("cannot find a device for %s.\n", path);
if (print == PRINT_DEVICE)
{
printf ("%s\n", device_name);
goto end;
}
abstraction_type = grub_util_get_dev_abstraction (device_name);
/* No need to check for errors; lack of abstraction is permissible. */
if (print == PRINT_ABSTRACTION)
{
char *abstraction_name;
switch (abstraction_type)
{
case GRUB_DEV_ABSTRACTION_LVM:
abstraction_name = "lvm";
break;
case GRUB_DEV_ABSTRACTION_RAID:
abstraction_name = "raid mdraid";
break;
default:
grub_util_info ("did not find LVM/RAID in %s, assuming raw device", device_name);
goto end;
}
printf ("%s\n", abstraction_name);
goto end;
}
drive_name = grub_util_get_grub_dev (device_name);
if (! drive_name)
grub_util_error ("Cannot find a GRUB drive for %s. Check your device.map.\n", device_name);
if (print == PRINT_DRIVE)
{
printf ("(%s)\n", drive_name);
goto end;
}
grub_util_info ("opening %s", drive_name);
dev = grub_device_open (drive_name);
if (! dev)
grub_util_error ("%s", grub_errmsg);
if (print == PRINT_PARTMAP)
{
grub_disk_memberlist_t list = NULL, tmp;
/* Check if dev->disk itself is contained in a partmap. */
probe_partmap (dev->disk);
/* In case of LVM/RAID, check the member devices as well. */
if (dev->disk->dev->memberlist)
list = dev->disk->dev->memberlist (dev->disk);
while (list)
{
probe_partmap (list->disk);
tmp = list->next;
free (list);
list = tmp;
}
goto end;
}
fs = grub_fs_probe (dev);
if (! fs)
grub_util_error ("%s", grub_errmsg);
if (print == PRINT_FS)
{
struct stat st;
stat (path, &st);
if (st.st_mode == S_IFREG)
{
/* Regular file. Verify that we can read it properly. */
grub_file_t file;
grub_util_info ("reading %s via OS facilities", path);
filebuf_via_sys = grub_util_read_image (path);
grub_util_info ("reading %s via GRUB facilities", path);
asprintf (&grub_path, "(%s)%s", drive_name, path);
file = grub_file_open (grub_path);
filebuf_via_grub = xmalloc (file->size);
grub_file_read (file, filebuf_via_grub, file->size);
grub_util_info ("comparing");
if (memcmp (filebuf_via_grub, filebuf_via_sys, file->size))
grub_util_error ("files differ");
}
printf ("%s\n", fs->name);
}
if (print == PRINT_FS_UUID)
{
char *uuid;
if (! fs->uuid)
grub_util_error ("%s does not support UUIDs", fs->name);
fs->uuid (dev, &uuid);
printf ("%s\n", uuid);
}
end:
if (dev)
grub_device_close (dev);
free (grub_path);
free (filebuf_via_grub);
free (filebuf_via_sys);
free (drive_name);
}
static struct option options[] =
{
{"device", no_argument, 0, 'd'},
{"device-map", required_argument, 0, 'm'},
{"target", required_argument, 0, 't'},
{"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-probe --help'' for more information.\n");
else
printf ("\
Usage: grub-probe [OPTION]... [PATH|DEVICE]\n\
\n\
Probe device information for a given path (or device, if the -d option is given).\n\
\n\
-d, --device given argument is a system device, not a path\n\
-m, --device-map=FILE use FILE as the device map [default=%s]\n\
-t, --target=(fs|fs_uuid|drive|device|partmap|abstraction)\n\
print filesystem module, GRUB drive, system device, partition map module or abstraction module [default=fs]\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_DEVICE_MAP, PACKAGE_BUGREPORT);
exit (status);
}
int
main (int argc, char *argv[])
{
char *dev_map = 0;
char *argument;
progname = "grub-probe";
/* Check for options. */
while (1)
{
int c = getopt_long (argc, argv, "dm:t:hVv", options, 0);
if (c == -1)
break;
else
switch (c)
{
case 'd':
argument_is_device = 1;
break;
case 'm':
if (dev_map)
free (dev_map);
dev_map = xstrdup (optarg);
break;
case 't':
if (!strcmp (optarg, "fs"))
print = PRINT_FS;
else if (!strcmp (optarg, "fs_uuid"))
print = PRINT_FS_UUID;
else if (!strcmp (optarg, "drive"))
print = PRINT_DRIVE;
else if (!strcmp (optarg, "device"))
print = PRINT_DEVICE;
else if (!strcmp (optarg, "partmap"))
print = PRINT_PARTMAP;
else if (!strcmp (optarg, "abstraction"))
print = PRINT_ABSTRACTION;
else
usage (1);
break;
case 'h':
usage (0);
break;
case 'V':
printf ("%s (%s) %s\n", progname, PACKAGE_NAME, PACKAGE_VERSION);
return 0;
case 'v':
verbosity++;
break;
default:
usage (1);
break;
}
}
if (verbosity > 1)
grub_env_set ("debug", "all");
/* Obtain ARGUMENT. */
if (optind >= argc)
{
fprintf (stderr, "No path or device is specified.\n");
usage (1);
}
if (optind + 1 != argc)
{
fprintf (stderr, "Unknown extra argument `%s'.\n", argv[optind + 1]);
usage (1);
}
argument = argv[optind];
/* Initialize the emulated biosdisk driver. */
grub_util_biosdisk_init (dev_map ? : DEFAULT_DEVICE_MAP);
/* Initialize all modules. */
grub_init_all ();
/* Do it. */
if (argument_is_device)
probe (NULL, argument);
else
probe (argument, NULL);
/* Free resources. */
grub_fini_all ();
grub_util_biosdisk_fini ();
free (dev_map);
return 0;
}
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