On Wed, Jul 14, 2010 at 7:51 PM, Carl Fredrik Hammar
<hammy.l...@gmail.com> wrote:
> On Tue, Jul 13, 2010 at 08:00:24PM +0200, Jérémie Koenig wrote:
>> The second one, which I favor and am working on so far, would be to
>> enumerate the _grub_ devices, and use get_storage_info() on them too.
> (...)
>
> This is a bit hacky but could be a good intermediate solution if your
> not comfortable with adding a new RPC that isn't strongly related to
> your project.
For what it's worth, I attach the patch I'm currently using.
--
Jérémie Koenig <j...@jk.fr.eu.org>
http://jk.fr.eu.org/
=== modified file 'Makefile.in'
Index: Makefile.in
===================================================================
--- Makefile.in.orig 2010-07-12 10:43:40.000000000 +0000
+++ Makefile.in 2010-07-16 13:08:46.000000000 +0000
@@ -49,6 +49,9 @@
# Util library.
LIBUTIL = @LIBUTIL@
+# Hurd's libstore
+LIBSTORE = @LIBSTORE@
+
XGETTEXT = @XGETTEXT@
MSGMERGE = @MSGMERGE@
MSGFMT = @MSGFMT@
@@ -84,7 +87,7 @@
mkinstalldirs = $(srcdir)/mkinstalldirs
-LIBS = @LIBS@ $(LIBINTL) $(LIBUTIL)
+LIBS = @LIBS@ $(LIBINTL) $(LIBUTIL) $(LIBSTORE)
CC = @CC@
CFLAGS = @CFLAGS@
Index: configure.ac
===================================================================
--- configure.ac.orig 2010-07-16 13:08:11.000000000 +0000
+++ configure.ac 2010-07-16 13:09:45.000000000 +0000
@@ -31,7 +31,7 @@
dnl type.
-AC_INIT([GRUB],[0],[bug-g...@gnu.org]) dnl version is filled by debian/rules
+AC_INIT([GRUB],[1.98+20100710-1+jk1],[bug-g...@gnu.org])
AM_INIT_AUTOMAKE()
AC_PREREQ(2.60)
AC_CONFIG_SRCDIR([include/grub/dl.h])
@@ -270,6 +270,18 @@
])
AC_SUBST([LIBUTIL])
+# On Hurd we need libstore for kern/emu/getroot.c
+case "$host_kernel" in
+ hurd)
+ AC_CHECK_HEADER([hurd/store.h], [], [AC_MSG_ERROR([hurd/store.h is needed])])
+ AC_CHECK_LIB([store], [store_create], [], [AC_MSG_ERROR([libstore is needed])])
+ LIBSTORE="-lstore"
+ ;;
+ *)
+ ;;
+esac
+AC_SUBST([LIBSTORE])
+
#
# Check for target programs.
#
Index: kern/emu/getroot.c
===================================================================
--- kern/emu/getroot.c.orig 2010-07-05 00:50:20.000000000 +0000
+++ kern/emu/getroot.c 2010-07-16 14:10:28.000000000 +0000
@@ -170,6 +170,161 @@
return 0;
}
+#elif defined(__GNU__)
+
+#include <mach.h>
+#include <hurd/hurd_types.h>
+#include <hurd/store.h>
+#include <grub/disk.h>
+#include <grub/partition.h>
+
+/* from hostdisk.c */
+extern struct
+{
+ char *drive;
+ char *device;
+} map[256];
+
+
+/* Open a store for storage information only. */
+static struct store *
+storeinfo_store (const char *path)
+{
+ file_t file;
+ struct store *store;
+ int err;
+
+ file = file_name_lookup (path, 0, 0);
+ if (file == MACH_PORT_NULL)
+ return NULL;
+
+ err = store_create (file, STORE_INACTIVE | STORE_NO_FILEIO, NULL, &store);
+ return err ? NULL : store;
+}
+
+/* Determine whether two stores share the same underlying storage. */
+static int
+same_storage (struct store *s1, struct store *s2)
+{
+ if (s1->class->id != s2->class->id)
+ return 0;
+
+ switch (s1->class->id)
+ {
+ case STORAGE_DEVICE:
+ case STORAGE_HURD_FILE:
+ case STORAGE_TASK:
+ case STORAGE_MEMORY:
+ if (s1->port != MACH_PORT_NULL && s1->port == s2->port)
+ return 1;
+ else if (s1->name && s2->name && strcmp (s1->name, s2->name) == 0)
+ return 1;
+ else
+ return 0;
+
+ default:
+ return 0;
+ }
+}
+
+/* Retreive the storage information for PATH, and search the device map until
+ * we find the matching disk, and maybe partition. */
+static char *
+find_hurd_root_device (const char *path)
+{
+ int winner_disk = -1, winner_part = -1;
+ struct store *path_store;
+ char *devpath = NULL;
+
+ auto int check_part (grub_disk_t, const grub_partition_t);
+ int check_part (grub_disk_t disk __attribute__((unused)),
+ const grub_partition_t partition)
+ {
+ store_offset_t start = partition->start * GRUB_DISK_SECTOR_SIZE,
+ length = partition->len * GRUB_DISK_SECTOR_SIZE,
+ fstart = path_store->runs->start * path_store->block_size;
+
+ grub_util_info ("Trying partition #%d (%ld+%ld)", partition->number,
+ (long) start, (long) length);
+
+ if (fstart >= start && fstart < start + length)
+ winner_part = partition->number;
+ else
+ grub_util_info ("The target is outside (%ld)", (long) fstart);
+
+ return winner_part >= 0;
+ }
+
+ auto int check_disk (const char *);
+ int check_disk (const char *name)
+ {
+ grub_disk_t disk;
+ struct store *disk_store;
+
+ grub_util_info ("Trying disk `%s'", name);
+
+ disk = grub_disk_open (name);
+ if (! disk)
+ goto out;
+
+ if (disk->dev->id != GRUB_DISK_DEVICE_BIOSDISK_ID)
+ {
+ grub_util_info ("`%s' is not a biosdisk", name);
+ goto out_disk;
+ }
+
+ disk_store = storeinfo_store (map[disk->id].device);
+ if (! disk_store)
+ {
+ grub_util_info ("Could not retreive storage info for `%s'", map[disk->id].device);
+ goto out_disk;
+ }
+
+ if (! same_storage (disk_store, path_store))
+ {
+ grub_util_info ("`%s' does not use the same storage as `%s'", name, path);
+ goto out_store;
+ }
+
+ winner_disk = disk->id;
+ grub_partition_iterate (disk, check_part);
+
+ out_store:
+ store_free (disk_store);
+ out_disk:
+ grub_disk_close (disk);
+ out:
+ return winner_disk >= 0;
+ }
+
+ path_store = storeinfo_store (path);
+ if (! path_store)
+ grub_util_error ("Could not retreive storage information for `%s'", path);
+
+ if (path_store->num_runs >= 1)
+ grub_disk_dev_iterate (check_disk);
+
+ if (winner_disk >= 0)
+ {
+ const char *diskpath = map[winner_disk].device;
+ devpath = xmalloc (strlen (diskpath) + 3 * sizeof (int) + 2);
+
+ strcpy (devpath, diskpath);
+ if (winner_part >= 0)
+ sprintf (devpath + strlen (devpath), "s%d", winner_part + 1);
+ }
+ else if (path_store->class->id == STORAGE_DEVICE && path_store->name)
+ {
+ /* use whatever device PATH_STORE is based on */
+ devpath = xmalloc (strlen (path_store->name) + sizeof "/dev/");
+ sprintf (devpath, "/dev/%s", path_store->name);
+ }
+
+ store_free (path_store);
+
+ return devpath;
+}
+
#elif ! defined(__CYGWIN__)
static char *
@@ -387,64 +542,10 @@
char *
grub_guess_root_device (const char *dir)
{
- char *os_dev;
#ifdef __GNU__
- file_t file;
- mach_port_t *ports;
- int *ints;
- loff_t *offsets;
- char *data;
- error_t err;
- mach_msg_type_number_t num_ports = 0, num_ints = 0, num_offsets = 0, data_len = 0;
- size_t name_len;
-
- file = file_name_lookup (dir, 0, 0);
- if (file == MACH_PORT_NULL)
- return 0;
-
- err = file_get_storage_info (file,
- &ports, &num_ports,
- &ints, &num_ints,
- &offsets, &num_offsets,
- &data, &data_len);
-
- if (num_ints < 1)
- grub_util_error ("Storage info for `%s' does not include type", dir);
- if (ints[0] != STORAGE_DEVICE)
- grub_util_error ("Filesystem of `%s' is not stored on local disk", dir);
-
- if (num_ints < 5)
- grub_util_error ("Storage info for `%s' does not include name", dir);
- name_len = ints[4];
- if (name_len < data_len)
- grub_util_error ("Bogus name length for storage info for `%s'", dir);
- if (data[name_len - 1] != '\0')
- grub_util_error ("Storage name for `%s' not NUL-terminated", dir);
-
- os_dev = xmalloc (strlen ("/dev/") + data_len);
- memcpy (os_dev, "/dev/", strlen ("/dev/"));
- memcpy (os_dev + strlen ("/dev/"), data, data_len);
-
- if (ports && num_ports > 0)
- {
- mach_msg_type_number_t i;
- for (i = 0; i < num_ports; i++)
- {
- mach_port_t port = ports[i];
- if (port != MACH_PORT_NULL)
- mach_port_deallocate (mach_task_self(), port);
- }
- munmap ((caddr_t) ports, num_ports * sizeof (*ports));
- }
-
- if (ints && num_ints > 0)
- munmap ((caddr_t) ints, num_ints * sizeof (*ints));
- if (offsets && num_offsets > 0)
- munmap ((caddr_t) offsets, num_offsets * sizeof (*offsets));
- if (data && data_len > 0)
- munmap (data, data_len);
- mach_port_deallocate (mach_task_self (), file);
+ return find_hurd_root_device (dir);
#else /* !__GNU__ */
+ char *os_dev;
struct stat st;
#ifdef __linux__
@@ -465,9 +566,9 @@
/* This might be truly slow, but is there any better way? */
os_dev = find_root_device ("/dev", st.st_dev);
#endif
-#endif /* !__GNU__ */
return os_dev;
+#endif /* !__GNU__ */
}
static int
Index: home/jk/gsoc/build/grub2-1.98+20100710/kern/emu/getroot.c
===================================================================
--- home/jk/gsoc/build/grub2-1.98+20100710/kern/emu/getroot.c 2010-07-16 14:05:48.000000000 +0000
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,740 +0,0 @@
-/* getroot.c - Get root device */
-/*
- * GRUB -- GRand Unified Bootloader
- * Copyright (C) 1999,2000,2001,2002,2003,2006,2007,2008,2009 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 <sys/stat.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <dirent.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-
-#ifdef __GNU__
-#include <hurd.h>
-#include <hurd/lookup.h>
-#include <hurd/fs.h>
-#include <sys/mman.h>
-#endif
-
-#include <grub/mm.h>
-#include <grub/misc.h>
-#include <grub/emu/misc.h>
-#include <grub/emu/hostdisk.h>
-#include <grub/emu/getroot.h>
-
-static void
-strip_extra_slashes (char *dir)
-{
- char *p = dir;
-
- while ((p = strchr (p, '/')) != 0)
- {
- if (p[1] == '/')
- {
- memmove (p, p + 1, strlen (p));
- continue;
- }
- else if (p[1] == '\0')
- {
- if (p > dir)
- p[0] = '\0';
- break;
- }
-
- p++;
- }
-}
-
-static char *
-xgetcwd (void)
-{
- size_t size = 10;
- char *path;
-
- path = xmalloc (size);
- while (! getcwd (path, size))
- {
- size <<= 1;
- path = xrealloc (path, size);
- }
-
- return path;
-}
-
-#ifdef __linux__
-
-/* Statting something on a btrfs filesystem always returns a virtual device
- major/minor pair rather than the real underlying device, because btrfs
- can span multiple underlying devices (and even if it's currently only
- using a single device it can be dynamically extended onto another). We
- can't deal with the multiple-device case yet, but in the meantime, we can
- at least cope with the single-device case by scanning
- /proc/self/mountinfo. */
-static char *
-find_root_device_from_mountinfo (const char *dir)
-{
- FILE *fp;
- char *buf = NULL;
- size_t len = 0;
- char *ret = NULL;
-
- fp = fopen ("/proc/self/mountinfo", "r");
- if (! fp)
- return NULL; /* fall through to other methods */
-
- while (getline (&buf, &len, fp) > 0)
- {
- int mnt_id, parent_mnt_id;
- unsigned int major, minor;
- char enc_root[PATH_MAX], enc_path[PATH_MAX];
- int count;
- size_t enc_path_len;
- const char *sep;
- char fstype[PATH_MAX], device[PATH_MAX];
- struct stat st;
-
- if (sscanf (buf, "%d %d %u:%u %s %s%n",
- &mnt_id, &parent_mnt_id, &major, &minor, enc_root, enc_path,
- &count) < 6)
- continue;
-
- if (strcmp (enc_root, "/") != 0)
- continue; /* only a subtree is mounted */
-
- enc_path_len = strlen (enc_path);
- if (strncmp (dir, enc_path, enc_path_len) != 0 ||
- (dir[enc_path_len] && dir[enc_path_len] != '/'))
- continue;
-
- /* This is a parent of the requested directory. /proc/self/mountinfo
- is in mount order, so it must be the closest parent we've
- encountered so far. If it's virtual, return its device node;
- otherwise, carry on to try to find something closer. */
-
- free (ret);
- ret = NULL;
-
- if (major != 0)
- continue; /* not a virtual device */
-
- sep = strstr (buf + count, " - ");
- if (!sep)
- continue;
-
- sep += sizeof (" - ") - 1;
- if (sscanf (sep, "%s %s", fstype, device) != 2)
- continue;
-
- if (stat (device, &st) < 0)
- continue;
-
- if (!S_ISBLK (st.st_mode))
- continue; /* not a block device */
-
- ret = strdup (device);
- }
-
- free (buf);
- fclose (fp);
- return ret;
-}
-
-#endif /* __linux__ */
-
-#ifdef __MINGW32__
-
-static char *
-find_root_device (const char *dir __attribute__ ((unused)),
- dev_t dev __attribute__ ((unused)))
-{
- return 0;
-}
-
-#elif defined(__GNU__)
-
-#include <mach.h>
-#include <hurd/hurd_types.h>
-#include <hurd/store.h>
-#include <grub/disk.h>
-#include <grub/partition.h>
-
-/* from hostdisk.c */
-extern struct
-{
- char *drive;
- char *device;
-} map[256];
-
-
-/* Open a store for storage information only. */
-static struct store *
-storeinfo_store (const char *path)
-{
- file_t file;
- struct store *store;
- int err;
-
- file = file_name_lookup (path, 0, 0);
- if (file == MACH_PORT_NULL)
- return NULL;
-
- err = store_create (file, STORE_INACTIVE | STORE_NO_FILEIO, NULL, &store);
- return err ? NULL : store;
-}
-
-/* Determine whether two stores share the same underlying storage. */
-static int
-same_storage (struct store *s1, struct store *s2)
-{
- if (s1->class->id != s2->class->id)
- return 0;
-
- switch (s1->class->id)
- {
- case STORAGE_DEVICE:
- case STORAGE_HURD_FILE:
- case STORAGE_TASK:
- case STORAGE_MEMORY:
- if (s1->port != MACH_PORT_NULL && s1->port == s2->port)
- return 1;
- else if (s1->name && s2->name && strcmp (s1->name, s2->name) == 0)
- return 1;
- else
- return 0;
-
- default:
- return 0;
- }
-}
-
-/* Retreive the storage information for PATH, and search the device map until
- * we find the matching disk, and maybe partition. */
-static char *
-find_hurd_root_device (const char *path)
-{
- int winner_disk = -1, winner_part = -1;
- struct store *path_store;
- char *devpath = NULL;
-
- int check_part (grub_disk_t disk __attribute__((unused)),
- const grub_partition_t partition)
- {
- store_offset_t start = partition->start * GRUB_DISK_SECTOR_SIZE,
- length = partition->len * GRUB_DISK_SECTOR_SIZE,
- fstart = path_store->runs->start * path_store->block_size;
-
- grub_util_info ("Trying partition #%d (%ld+%ld)", partition->number,
- (long) start, (long) length);
-
- if (fstart >= start && fstart < start + length)
- winner_part = partition->number;
- else
- grub_util_info ("The target is outside (%ld)", (long) fstart);
-
- return winner_part >= 0;
- }
-
- int check_disk (const char *name)
- {
- grub_disk_t disk;
- struct store *disk_store;
-
- grub_util_info ("Trying disk `%s'", name);
-
- disk = grub_disk_open (name);
- if (! disk)
- goto out;
-
- if (disk->dev->id != GRUB_DISK_DEVICE_BIOSDISK_ID)
- {
- grub_util_info ("`%s' is not a biosdisk", name);
- goto out_disk;
- }
-
- disk_store = storeinfo_store (map[disk->id].device);
- if (! disk_store)
- {
- grub_util_info ("Could not retreive storage info for `%s'", map[disk->id].device);
- goto out_disk;
- }
-
- if (! same_storage (disk_store, path_store))
- {
- grub_util_info ("`%s' does not use the same storage as `%s'", name, path);
- goto out_store;
- }
-
- winner_disk = disk->id;
- grub_partition_iterate (disk, check_part);
-
- out_store:
- store_free (disk_store);
- out_disk:
- grub_disk_close (disk);
- out:
- return winner_disk >= 0;
- }
-
- path_store = storeinfo_store (path);
- if (! path_store)
- grub_util_error ("Could not retreive storage information for `%s'", path);
-
- if (path_store->num_runs >= 1)
- grub_disk_dev_iterate (check_disk);
-
- if (winner_disk >= 0)
- {
- const char *diskpath = map[winner_disk].device;
- devpath = xmalloc (strlen (diskpath) + 3 * sizeof (int) + 2);
-
- strcpy (devpath, diskpath);
- if (winner_part >= 0)
- sprintf (devpath + strlen (devpath), "s%d", winner_part + 1);
- }
- else if (path_store->class->id == STORAGE_DEVICE && path_store->name)
- {
- /* use whatever device PATH_STORE is based on */
- devpath = xmalloc (strlen (path_store->name) + sizeof "/dev/");
- sprintf (devpath, "/dev/%s", path_store->name);
- }
-
- store_free (path_store);
-
- return devpath;
-}
-
-#elif ! defined(__CYGWIN__)
-
-static char *
-find_root_device (const char *dir, dev_t dev)
-{
- DIR *dp;
- char *saved_cwd;
- struct dirent *ent;
-
- dp = opendir (dir);
- if (! dp)
- return 0;
-
- saved_cwd = xgetcwd ();
-
- grub_util_info ("changing current directory to %s", dir);
- if (chdir (dir) < 0)
- {
- free (saved_cwd);
- closedir (dp);
- return 0;
- }
-
- while ((ent = readdir (dp)) != 0)
- {
- struct stat st;
-
- /* Avoid:
- - dotfiles (like "/dev/.tmp.md0") since they could be duplicates.
- - dotdirs (like "/dev/.static") since they could contain duplicates. */
- if (ent->d_name[0] == '.')
- continue;
-
- if (lstat (ent->d_name, &st) < 0)
- /* Ignore any error. */
- continue;
-
- if (S_ISLNK (st.st_mode)) {
-#ifdef __linux__
- if (strcmp (dir, "mapper") == 0) {
- /* Follow symbolic links under /dev/mapper/; the canonical name
- may be something like /dev/dm-0, but the names under
- /dev/mapper/ are more human-readable and so we prefer them if
- we can get them. */
- if (stat (ent->d_name, &st) < 0)
- continue;
- } else
-#endif /* __linux__ */
- /* Don't follow other symbolic links. */
- continue;
- }
-
- if (S_ISDIR (st.st_mode))
- {
- /* Find it recursively. */
- char *res;
-
- res = find_root_device (ent->d_name, dev);
-
- if (res)
- {
- if (chdir (saved_cwd) < 0)
- grub_util_error ("cannot restore the original directory");
-
- free (saved_cwd);
- closedir (dp);
- return res;
- }
- }
-
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__)
- if (S_ISCHR (st.st_mode) && st.st_rdev == dev)
-#else
- if (S_ISBLK (st.st_mode) && st.st_rdev == dev)
-#endif
- {
-#ifdef __linux__
- /* Skip device names like /dev/dm-0, which are short-hand aliases
- to more descriptive device names, e.g. those under /dev/mapper */
- if (ent->d_name[0] == 'd' &&
- ent->d_name[1] == 'm' &&
- ent->d_name[2] == '-' &&
- ent->d_name[3] >= '0' &&
- ent->d_name[3] <= '9')
- continue;
-#endif
-
- /* Found! */
- char *res;
- char *cwd;
-#if defined(__NetBSD__)
- /* Convert this block device to its character (raw) device. */
- const char *template = "%s/r%s";
-#else
- /* Keep the device name as it is. */
- const char *template = "%s/%s";
-#endif
-
- cwd = xgetcwd ();
- res = xmalloc (strlen (cwd) + strlen (ent->d_name) + 3);
- sprintf (res, template, cwd, ent->d_name);
- strip_extra_slashes (res);
- free (cwd);
-
- /* /dev/root is not a real block device keep looking, takes care
- of situation where root filesystem is on the same partition as
- grub files */
-
- if (strcmp(res, "/dev/root") == 0)
- continue;
-
- if (chdir (saved_cwd) < 0)
- grub_util_error ("cannot restore the original directory");
-
- free (saved_cwd);
- closedir (dp);
- return res;
- }
- }
-
- if (chdir (saved_cwd) < 0)
- grub_util_error ("cannot restore the original directory");
-
- free (saved_cwd);
- closedir (dp);
- return 0;
-}
-
-#else /* __CYGWIN__ */
-
-/* Read drive/partition serial number from mbr/boot sector,
- return 0 on read error, ~0 on unknown serial. */
-static unsigned
-get_bootsec_serial (const char *os_dev, int mbr)
-{
- /* Read boot sector. */
- int fd = open (os_dev, O_RDONLY);
- if (fd < 0)
- return 0;
- unsigned char buf[0x200];
- int n = read (fd, buf, sizeof (buf));
- close (fd);
- if (n != sizeof(buf))
- return 0;
-
- /* Check signature. */
- if (!(buf[0x1fe] == 0x55 && buf[0x1ff] == 0xaa))
- return ~0;
-
- /* Serial number offset depends on boot sector type. */
- if (mbr)
- n = 0x1b8;
- else if (memcmp (buf + 0x03, "NTFS", 4) == 0)
- n = 0x048;
- else if (memcmp (buf + 0x52, "FAT32", 5) == 0)
- n = 0x043;
- else if (memcmp (buf + 0x36, "FAT", 3) == 0)
- n = 0x027;
- else
- return ~0;
-
- unsigned serial = *(unsigned *)(buf + n);
- if (serial == 0)
- return ~0;
- return serial;
-}
-
-static char *
-find_cygwin_root_device (const char *path, dev_t dev)
-{
- /* No root device for /cygdrive. */
- if (dev == (DEV_CYGDRIVE_MAJOR << 16))
- return 0;
-
- /* Convert to full POSIX and Win32 path. */
- char fullpath[PATH_MAX], winpath[PATH_MAX];
- cygwin_conv_to_full_posix_path (path, fullpath);
- cygwin_conv_to_full_win32_path (fullpath, winpath);
-
- /* If identical, this is no real filesystem path. */
- if (strcmp (fullpath, winpath) == 0)
- return 0;
-
- /* Check for floppy drive letter. */
- if (winpath[0] && winpath[1] == ':' && strchr ("AaBb", winpath[0]))
- return xstrdup (strchr ("Aa", winpath[0]) ? "/dev/fd0" : "/dev/fd1");
-
- /* Cygwin returns the partition serial number in stat.st_dev.
- This is never identical to the device number of the emulated
- /dev/sdXN device, so above find_root_device () does not work.
- Search the partition with the same serial in boot sector instead. */
- char devpath[sizeof ("/dev/sda15") + 13]; /* Size + Paranoia. */
- int d;
- for (d = 'a'; d <= 'z'; d++)
- {
- sprintf (devpath, "/dev/sd%c", d);
- if (get_bootsec_serial (devpath, 1) == 0)
- continue;
- int p;
- for (p = 1; p <= 15; p++)
- {
- sprintf (devpath, "/dev/sd%c%d", d, p);
- unsigned ser = get_bootsec_serial (devpath, 0);
- if (ser == 0)
- break;
- if (ser != (unsigned)~0 && dev == (dev_t)ser)
- return xstrdup (devpath);
- }
- }
- return 0;
-}
-
-#endif /* __CYGWIN__ */
-
-char *
-grub_guess_root_device (const char *dir)
-{
-#ifdef __GNU__
- return find_hurd_root_device (dir);
-#else /* !__GNU__ */
- char *os_dev;
- struct stat st;
-
-#ifdef __linux__
- os_dev = find_root_device_from_mountinfo (dir);
- if (os_dev)
- return os_dev;
-#endif /* __linux__ */
-
- if (stat (dir, &st) < 0)
- grub_util_error ("cannot stat `%s'", dir);
-
-#ifdef __CYGWIN__
- /* Cygwin specific function. */
- os_dev = find_cygwin_root_device (dir, st.st_dev);
-
-#else
-
- /* This might be truly slow, but is there any better way? */
- os_dev = find_root_device ("/dev", st.st_dev);
-#endif
-
- return os_dev;
-#endif /* !__GNU__ */
-}
-
-static int
-grub_util_is_dmraid (const char *os_dev)
-{
- if (! strncmp (os_dev, "/dev/mapper/nvidia_", 19))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/isw_", 16))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/hpt37x_", 19))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/hpt45x_", 19))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/via_", 16))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/lsi_", 16))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/pdc_", 16))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/jmicron_", 20))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/asr_", 16))
- return 1;
- else if (! strncmp (os_dev, "/dev/mapper/sil_", 16))
- return 1;
-
- return 0;
-}
-
-int
-grub_util_get_dev_abstraction (const char *os_dev __attribute__((unused)))
-{
-#ifdef __linux__
- /* Check for LVM. */
- if (!strncmp (os_dev, "/dev/mapper/", 12)
- && ! grub_util_is_dmraid (os_dev)
- && strncmp (os_dev, "/dev/mapper/mpath", 17) != 0)
- return GRUB_DEV_ABSTRACTION_LVM;
-
- /* Check for RAID. */
- if (!strncmp (os_dev, "/dev/md", 7))
- return GRUB_DEV_ABSTRACTION_RAID;
-#endif
-
- /* No abstraction found. */
- return GRUB_DEV_ABSTRACTION_NONE;
-}
-
-char *
-grub_util_get_grub_dev (const char *os_dev)
-{
- char *grub_dev;
-
- switch (grub_util_get_dev_abstraction (os_dev))
- {
- case GRUB_DEV_ABSTRACTION_LVM:
-
- {
- unsigned short i, len;
- grub_size_t offset = sizeof ("/dev/mapper/") - 1;
-
- len = strlen (os_dev) - offset + 1;
- grub_dev = xmalloc (len);
-
- for (i = 0; i < len; i++, offset++)
- {
- grub_dev[i] = os_dev[offset];
- if (os_dev[offset] == '-' && os_dev[offset + 1] == '-')
- offset++;
- }
- }
-
- break;
-
- case GRUB_DEV_ABSTRACTION_RAID:
-
- if (os_dev[7] == '_' && os_dev[8] == 'd')
- {
- /* This a partitionable RAID device of the form /dev/md_dNNpMM. */
-
- char *p, *q;
-
- p = strdup (os_dev + sizeof ("/dev/md_d") - 1);
-
- q = strchr (p, 'p');
- if (q)
- *q = ',';
-
- grub_dev = xasprintf ("md%s", p);
- free (p);
- }
- else if (os_dev[7] == '/' && os_dev[8] == 'd')
- {
- /* This a partitionable RAID device of the form /dev/md/dNNpMM. */
-
- char *p, *q;
-
- p = strdup (os_dev + sizeof ("/dev/md/d") - 1);
-
- q = strchr (p, 'p');
- if (q)
- *q = ',';
-
- grub_dev = xasprintf ("md%s", p);
- free (p);
- }
- else if (os_dev[7] >= '0' && os_dev[7] <= '9')
- {
- char *p , *q;
-
- p = strdup (os_dev + sizeof ("/dev/md") - 1);
-
- q = strchr (p, 'p');
- if (q)
- *q = ',';
-
- grub_dev = xasprintf ("md%s", p);
- free (p);
- }
- else if (os_dev[7] == '/' && os_dev[8] >= '0' && os_dev[8] <= '9')
- {
- char *p , *q;
-
- p = strdup (os_dev + sizeof ("/dev/md/") - 1);
-
- q = strchr (p, 'p');
- if (q)
- *q = ',';
-
- grub_dev = xasprintf ("md%s", p);
- free (p);
- }
- else
- grub_util_error ("unknown kind of RAID device `%s'", os_dev);
-
- break;
-
- default: /* GRUB_DEV_ABSTRACTION_NONE */
- grub_dev = grub_util_biosdisk_get_grub_dev (os_dev);
- }
-
- return grub_dev;
-}
-
-const char *
-grub_util_check_block_device (const char *blk_dev)
-{
- struct stat st;
-
- if (stat (blk_dev, &st) < 0)
- grub_util_error ("cannot stat `%s'", blk_dev);
-
- if (S_ISBLK (st.st_mode))
- return (blk_dev);
- else
- return 0;
-}
-
-const char *
-grub_util_check_char_device (const char *blk_dev)
-{
- struct stat st;
-
- if (stat (blk_dev, &st) < 0)
- grub_util_error ("cannot stat `%s'", blk_dev);
-
- if (S_ISCHR (st.st_mode))
- return (blk_dev);
- else
- return 0;
-}
