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-rw-r--r--grub-core/osdep/windows/getroot.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/grub-core/osdep/windows/getroot.c b/grub-core/osdep/windows/getroot.c
new file mode 100644
index 0000000..eada663
--- /dev/null
+++ b/grub-core/osdep/windows/getroot.c
@@ -0,0 +1,355 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1999,2000,2001,2002,2003,2006,2007,2008,2009,2010,2011,2012,2013 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-util.h>
+#include <config.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <dirent.h>
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#include <grub/types.h>
+
+#include <grub/util/misc.h>
+
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/emu/misc.h>
+#include <grub/emu/hostdisk.h>
+#include <grub/emu/getroot.h>
+#include <grub/charset.h>
+#include <grub/util/windows.h>
+#include <windows.h>
+#include <winioctl.h>
+
+TCHAR *
+grub_get_mount_point (const TCHAR *path)
+{
+ const TCHAR *ptr;
+ TCHAR *out;
+ TCHAR letter = 0;
+ size_t allocsize;
+
+ for (ptr = path; *ptr; ptr++);
+ allocsize = (ptr - path + 10) * 2;
+ out = xcalloc (allocsize, sizeof (out[0]));
+
+ /* When pointing to EFI system partition GetVolumePathName fails
+ for ESP root and returns abberant information for everything
+ else. Since GetVolumePathName shouldn't fail for any valid
+ //?/X: we use it as indicator. */
+ if ((path[0] == '/' || path[0] == '\\')
+ && (path[1] == '/' || path[1] == '\\')
+ && (path[2] == '?' || path[2] == '.')
+ && (path[3] == '/' || path[3] == '\\')
+ && path[4]
+ && (path[5] == ':'))
+ letter = path[4];
+ if (path[0] && path[1] == ':')
+ letter = path[0];
+ if (letter)
+ {
+ TCHAR letterpath[10] = TEXT("\\\\?\\#:");
+ letterpath[4] = letter;
+ if (!GetVolumePathName (letterpath, out, allocsize))
+ {
+ if (path[1] == ':')
+ {
+ out[0] = path[0];
+ out[1] = ':';
+ out[2] = '\0';
+ return out;
+ }
+ memcpy (out, path, sizeof (out[0]) * 6);
+ out[6] = '\0';
+ return out;
+ }
+ }
+
+ if (!GetVolumePathName (path, out, allocsize))
+ {
+ free (out);
+ return NULL;
+ }
+ return out;
+}
+
+char **
+grub_guess_root_devices (const char *dir)
+{
+ char **os_dev = NULL;
+ TCHAR *dirwindows, *mntpointwindows;
+ TCHAR *ptr;
+ TCHAR volumename[100];
+
+ dirwindows = grub_util_get_windows_path (dir);
+ if (!dirwindows)
+ return 0;
+
+ mntpointwindows = grub_get_mount_point (dirwindows);
+
+ if (!mntpointwindows)
+ {
+ free (dirwindows);
+ grub_util_info ("can't get volume path name: %d", (int) GetLastError ());
+ return 0;
+ }
+
+ if (!mntpointwindows[0])
+ {
+ free (dirwindows);
+ free (mntpointwindows);
+ return 0;
+ }
+
+ for (ptr = mntpointwindows; *ptr; ptr++);
+ if (*(ptr - 1) != '\\')
+ {
+ *ptr = '\\';
+ *(ptr + 1) = '\0';
+ }
+
+ if (!GetVolumeNameForVolumeMountPoint (mntpointwindows,
+ volumename,
+ ARRAY_SIZE (volumename)))
+ {
+ TCHAR letter = 0;
+ if ((mntpointwindows[0] == '/' || mntpointwindows[0] == '\\')
+ && (mntpointwindows[1] == '/' || mntpointwindows[1] == '\\')
+ && (mntpointwindows[2] == '?' || mntpointwindows[2] == '.')
+ && (mntpointwindows[3] == '/' || mntpointwindows[3] == '\\')
+ && mntpointwindows[4]
+ && (mntpointwindows[5] == ':'))
+ letter = mntpointwindows[4];
+ if (mntpointwindows[0] && mntpointwindows[1] == ':')
+ letter = mntpointwindows[0];
+ if (!letter)
+ {
+ free (dirwindows);
+ free (mntpointwindows);
+ return 0;
+ }
+ volumename[0] = '\\';
+ volumename[1] = '\\';
+ volumename[2] = '?';
+ volumename[3] = '\\';
+ volumename[4] = letter;
+ volumename[5] = ':';
+ volumename[6] = '\0';
+ }
+ os_dev = xmalloc (2 * sizeof (os_dev[0]));
+
+ for (ptr = volumename; *ptr; ptr++);
+ while (ptr > volumename && *(ptr - 1) == '\\')
+ *--ptr = '\0';
+
+ os_dev[0] = grub_util_tchar_to_utf8 (volumename);
+ free (dirwindows);
+ free (mntpointwindows);
+
+ if (!os_dev[0])
+ {
+ free (os_dev);
+ return 0;
+ }
+
+ os_dev[1] = 0;
+
+ return os_dev;
+}
+
+static int tcharncasecmp (LPCTSTR a, const char *b, size_t sz)
+{
+ for (; sz; sz--, a++, b++)
+ {
+ char ac, bc;
+ if(*a >= 0x80)
+ return +1;
+ if (*b & 0x80)
+ return -1;
+ if (*a == '\0' && *b == '\0')
+ return 0;
+ ac = *a;
+ bc = *b;
+ if (ac >= 'A' && ac <= 'Z')
+ ac -= 'A' - 'a';
+ if (bc >= 'A' && bc <= 'Z')
+ bc -= 'A' - 'a';
+ if (ac > bc)
+ return +1;
+ if (ac < bc)
+ return -1;
+ }
+ return 0;
+}
+
+char *
+grub_util_part_to_disk (const char *os_dev,
+ struct stat *st __attribute__ ((unused)),
+ int *is_part)
+{
+ HANDLE hd;
+ LPTSTR name = grub_util_get_windows_path (os_dev);
+ VOLUME_DISK_EXTENTS exts;
+ DWORD extsbytes;
+ char *ret;
+
+ if (((name[0] == '/') || (name[0] == '\\')) &&
+ ((name[1] == '/') || (name[1] == '\\')) &&
+ ((name[2] == '.') || (name[2] == '?')) &&
+ ((name[3] == '/') || (name[3] == '\\'))
+ && (tcharncasecmp (name + 4, "PhysicalDrive", sizeof ("PhysicalDrive") - 1) == 0
+ || tcharncasecmp (name + 4, "Harddisk", sizeof ("Harddisk") - 1) == 0
+ || ((name[4] == 'A' || name[4] == 'a' || name[4] == 'B' || name[4] == 'b')
+ && name[5] == ':' && name[6] == '\0')))
+ {
+ grub_util_info ("Matches full disk pattern");
+ ret = grub_util_tchar_to_utf8 (name);
+ free (name);
+ return ret;
+ }
+
+ hd = CreateFile (name, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
+ 0, OPEN_EXISTING, 0, 0);
+ if (hd == INVALID_HANDLE_VALUE)
+ {
+ grub_util_info ("CreateFile failed");
+ ret = grub_util_tchar_to_utf8 (name);
+ free (name);
+ return ret;
+ }
+
+ if (!DeviceIoControl(hd, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS,
+ NULL, 0, &exts, sizeof (exts), &extsbytes, NULL))
+ {
+ grub_util_info ("IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS failed");
+ ret = grub_util_tchar_to_utf8 (name);
+ CloseHandle (hd);
+ free (name);
+ return ret;
+ }
+
+ CloseHandle (hd);
+
+ *is_part = 1;
+ free (name);
+ return xasprintf ("\\\\?\\PhysicalDrive%lu", (unsigned long) exts.Extents[0].DiskNumber);
+}
+
+enum grub_dev_abstraction_types
+grub_util_get_dev_abstraction_os (const char *os_dev __attribute__((unused)))
+{
+ return GRUB_DEV_ABSTRACTION_NONE;
+}
+
+int
+grub_util_pull_device_os (const char *os_dev __attribute__ ((unused)),
+ enum grub_dev_abstraction_types ab __attribute__ ((unused)))
+{
+ return 0;
+}
+
+char *
+grub_util_get_grub_dev_os (const char *os_dev __attribute__ ((unused)))
+{
+ return NULL;
+}
+
+
+grub_disk_addr_t
+grub_util_find_partition_start_os (const char *os_dev)
+{
+ HANDLE hd;
+ LPTSTR name = grub_util_get_windows_path (os_dev);
+ VOLUME_DISK_EXTENTS exts;
+ DWORD extsbytes;
+ char *ret;
+
+ if (((name[0] == '/') || (name[0] == '\\')) &&
+ ((name[1] == '/') || (name[1] == '\\')) &&
+ ((name[2] == '.') || (name[2] == '?')) &&
+ ((name[3] == '/') || (name[3] == '\\'))
+ && (tcharncasecmp (name + 4, "PhysicalDrive", sizeof ("PhysicalDrive") - 1) == 0
+ || tcharncasecmp (name + 4, "Harddisk", sizeof ("Harddisk") - 1) == 0
+ || ((name[4] == 'A' || name[4] == 'a' || name[4] == 'B' || name[4] == 'b')
+ && name[5] == ':' && name[6] == '\0')))
+ {
+ ret = grub_util_tchar_to_utf8 (name);
+ free (name);
+ return 0;
+ }
+
+ hd = CreateFile (name, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
+ 0, OPEN_EXISTING, 0, 0);
+ if (hd == INVALID_HANDLE_VALUE)
+ {
+ ret = grub_util_tchar_to_utf8 (name);
+ free (name);
+ return 0;
+ }
+
+ if (!DeviceIoControl(hd, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS,
+ NULL, 0, &exts, sizeof (exts), &extsbytes, NULL))
+ {
+ ret = grub_util_tchar_to_utf8 (name);
+ CloseHandle (hd);
+ free (name);
+ return 0;
+ }
+
+ CloseHandle (hd);
+ free (name);
+ return exts.Extents[0].StartingOffset.QuadPart / 512;
+}
+
+int
+grub_util_biosdisk_is_floppy (grub_disk_t disk)
+{
+ int ret;
+ const char *dname;
+ LPTSTR name;
+
+ dname = grub_util_biosdisk_get_osdev (disk);
+
+ if (!dname)
+ return 0;
+
+ name = grub_util_get_windows_path (dname);
+
+ ret = (((name[0] == '/') || (name[0] == '\\')) &&
+ ((name[1] == '/') || (name[1] == '\\')) &&
+ ((name[2] == '.') || (name[2] == '?')) &&
+ ((name[3] == '/') || (name[3] == '\\'))
+ && (name[4] == 'A' || name[4] == 'a' || name[4] == 'B' || name[4] == 'b')
+ && name[5] == ':' && name[6] == '\0');
+ free (name);
+
+ return ret;
+}
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