diff options
Diffstat (limited to 'util/grub-probe.c')
| -rw-r--r-- | util/grub-probe.c | 419 |
1 files changed, 419 insertions, 0 deletions
diff --git a/util/grub-probe.c b/util/grub-probe.c new file mode 100644 index 0000000..0d5dac9 --- /dev/null +++ b/util/grub-probe.c @@ -0,0 +1,419 @@ +/* grub-probe.c - probe device information for a given path */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2005,2006,2007,2008,2009,2010 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 <grub/types.h> +#include <grub/emu/misc.h> +#include <grub/util/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/msdos_partition.h> +#include <grub/emu/hostdisk.h> +#include <grub/emu/getroot.h> +#include <grub/term.h> +#include <grub/env.h> +#include <grub/raid.h> +#include <grub/i18n.h> + +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <stdlib.h> +#include <sys/stat.h> + +#define _GNU_SOURCE 1 +#include <getopt.h> + +#include "progname.h" + +enum { + PRINT_FS, + PRINT_FS_UUID, + PRINT_FS_LABEL, + PRINT_DRIVE, + PRINT_DEVICE, + PRINT_PARTMAP, + PRINT_ABSTRACTION, +}; + +int print = PRINT_FS; +static unsigned int argument_is_device = 0; + +static void +probe_partmap (grub_disk_t disk) +{ + grub_partition_t part; + + if (disk->partition == NULL) + { + grub_util_info ("no partition map found for %s", disk->name); + return; + } + + for (part = disk->partition; part; part = part->parent) + printf ("%s\n", part->partmap->name); +} + +static int +probe_raid_level (grub_disk_t disk) +{ + /* disk might be NULL in the case of a LVM physical volume with no LVM + signature. Ignore such cases here. */ + if (!disk) + return -1; + + if (disk->dev->id != GRUB_DISK_DEVICE_RAID_ID) + return -1; + + return ((struct grub_raid_array *) disk->data)->level; +} + +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; + grub_device_t dev = NULL; + grub_fs_t fs; + + if (path == NULL) + { +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) + if (! grub_util_check_char_device (device_name)) + grub_util_error ("%s is not a character device", device_name); +#else + if (! grub_util_check_block_device (device_name)) + grub_util_error ("%s is not a block device", device_name); +#endif + } + else + device_name = grub_guess_root_device (path); + + if (! device_name) + grub_util_error ("cannot find a device for %s (is /dev mounted?)", path); + + if (print == PRINT_DEVICE) + { + printf ("%s\n", device_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", 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_ABSTRACTION) + { + grub_disk_memberlist_t list = NULL, tmp; + const int is_lvm = (dev->disk->dev->id == GRUB_DISK_DEVICE_LVM_ID); + int is_raid = 0; + int is_raid5 = 0; + int is_raid6 = 0; + int raid_level; + grub_disk_t raid_disk; + + raid_level = probe_raid_level (dev->disk); + if (raid_level >= 0) + { + is_raid = 1; + is_raid5 |= (raid_level == 5); + is_raid6 |= (raid_level == 6); + raid_disk = dev->disk; + } + + if ((is_lvm) && (dev->disk->dev->memberlist)) + list = dev->disk->dev->memberlist (dev->disk); + while (list) + { + raid_level = probe_raid_level (list->disk); + if (raid_level >= 0) + { + is_raid = 1; + is_raid5 |= (raid_level == 5); + is_raid6 |= (raid_level == 6); + raid_disk = list->disk; + } + + tmp = list->next; + free (list); + list = tmp; + } + + if (is_raid) + { + printf ("raid "); + if (is_raid5) + printf ("raid5rec "); + if (is_raid6) + printf ("raid6rec "); + if (raid_disk->dev->raidname) + printf ("%s ", raid_disk->dev->raidname (raid_disk)); + } + + if (is_lvm) + printf ("lvm "); + + printf ("\n"); + + goto end; + } + + 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); + /* LVM on RAID */ + if (list->disk->dev->memberlist) + { + grub_disk_memberlist_t sub_list; + + sub_list = list->disk->dev->memberlist (list->disk); + while (sub_list) + { + probe_partmap (sub_list->disk); + tmp = sub_list->next; + free (sub_list); + sub_list = tmp; + } + } + 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) + { + printf ("%s\n", fs->name); + } + else if (print == PRINT_FS_UUID) + { + char *uuid; + if (! fs->uuid) + grub_util_error ("%s does not support UUIDs", fs->name); + + if (fs->uuid (dev, &uuid) != GRUB_ERR_NONE) + grub_util_error ("%s", grub_errmsg); + + printf ("%s\n", uuid); + } + else if (print == PRINT_FS_LABEL) + { + char *label; + if (! fs->label) + grub_util_error ("%s does not support labels", fs->name); + + if (fs->label (dev, &label) != GRUB_ERR_NONE) + grub_util_error ("%s", grub_errmsg); + + printf ("%s\n", label); + } + + 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 `%s --help' for more information.\n", program_name); + else + printf ("\ +Usage: %s [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|fs_label|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\ +", program_name, + DEFAULT_DEVICE_MAP, PACKAGE_BUGREPORT); + + exit (status); +} + +int +main (int argc, char *argv[]) +{ + char *dev_map = 0; + char *argument; + + set_program_name (argv[0]); + + grub_util_init_nls (); + + /* 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, "fs_label")) + print = PRINT_FS_LABEL; + 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", program_name, 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 (); + + grub_lvm_fini (); + grub_mdraid09_fini (); + grub_mdraid1x_fini (); + grub_raid_fini (); + grub_raid_init (); + grub_mdraid09_init (); + grub_mdraid1x_init (); + grub_lvm_init (); + + /* 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; +} |