*/
/*
- * Copyright (C) 2013 Eric Biggers
+ * Copyright (C) 2013-2016 Eric Biggers
*
- * This file is part of wimlib, a library for working with WIM files.
+ * This file is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option) any
+ * later version.
*
- * wimlib 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.
- *
- * wimlib 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
+ * This file 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 Lesser General Public License for more
* details.
*
- * You should have received a copy of the GNU General Public License
- * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this file; if not, see http://www.gnu.org/licenses/.
*/
#ifdef __WIN32__
# include "config.h"
#endif
-#include <errno.h>
-
#include "wimlib/win32_common.h"
#include "wimlib/assert.h"
#include "wimlib/error.h"
#include "wimlib/util.h"
-
-#ifdef ENABLE_ERROR_MESSAGES
-void
-win32_error(DWORD err_code)
-{
- wchar_t *buffer;
- DWORD nchars;
- nchars = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM |
- FORMAT_MESSAGE_ALLOCATE_BUFFER,
- NULL, err_code, 0,
- (wchar_t*)&buffer, 0, NULL);
- if (nchars == 0) {
- ERROR("Error printing error message! "
- "Computer will self-destruct in 3 seconds.");
- } else {
- ERROR("Win32 error: %ls", buffer);
- LocalFree(buffer);
- }
-}
-#endif /* ENABLE_ERROR_MESSAGES */
-
-int
-win32_error_to_errno(DWORD err_code)
-{
- /* This mapping is that used in Cygwin.
- * Some of these choices are arbitrary. */
- switch (err_code) {
- case ERROR_ACCESS_DENIED:
- return EACCES;
- case ERROR_ACTIVE_CONNECTIONS:
- return EAGAIN;
- case ERROR_ALREADY_EXISTS:
- return EEXIST;
- case ERROR_BAD_DEVICE:
- return ENODEV;
- case ERROR_BAD_EXE_FORMAT:
- return ENOEXEC;
- case ERROR_BAD_NETPATH:
- return ENOENT;
- case ERROR_BAD_NET_NAME:
- return ENOENT;
- case ERROR_BAD_NET_RESP:
- return ENOSYS;
- case ERROR_BAD_PATHNAME:
- return ENOENT;
- case ERROR_BAD_PIPE:
- return EINVAL;
- case ERROR_BAD_UNIT:
- return ENODEV;
- case ERROR_BAD_USERNAME:
- return EINVAL;
- case ERROR_BEGINNING_OF_MEDIA:
- return EIO;
- case ERROR_BROKEN_PIPE:
- return EPIPE;
- case ERROR_BUSY:
- return EBUSY;
- case ERROR_BUS_RESET:
- return EIO;
- case ERROR_CALL_NOT_IMPLEMENTED:
- return ENOSYS;
- case ERROR_CANNOT_MAKE:
- return EPERM;
- case ERROR_CHILD_NOT_COMPLETE:
- return EBUSY;
- case ERROR_COMMITMENT_LIMIT:
- return EAGAIN;
- case ERROR_CRC:
- return EIO;
- case ERROR_DEVICE_DOOR_OPEN:
- return EIO;
- case ERROR_DEVICE_IN_USE:
- return EAGAIN;
- case ERROR_DEVICE_REQUIRES_CLEANING:
- return EIO;
- case ERROR_DIRECTORY:
- return ENOTDIR;
- case ERROR_DIR_NOT_EMPTY:
- return ENOTEMPTY;
- case ERROR_DISK_CORRUPT:
- return EIO;
- case ERROR_DISK_FULL:
- return ENOSPC;
-#ifdef ENOTUNIQ
- case ERROR_DUP_NAME:
- return ENOTUNIQ;
-#endif
- case ERROR_EAS_DIDNT_FIT:
- return ENOSPC;
-#ifdef ENOTSUP
- case ERROR_EAS_NOT_SUPPORTED:
- return ENOTSUP;
-#endif
- case ERROR_EA_LIST_INCONSISTENT:
- return EINVAL;
- case ERROR_EA_TABLE_FULL:
- return ENOSPC;
- case ERROR_END_OF_MEDIA:
- return ENOSPC;
- case ERROR_EOM_OVERFLOW:
- return EIO;
- case ERROR_EXE_MACHINE_TYPE_MISMATCH:
- return ENOEXEC;
- case ERROR_EXE_MARKED_INVALID:
- return ENOEXEC;
- case ERROR_FILEMARK_DETECTED:
- return EIO;
- case ERROR_FILENAME_EXCED_RANGE:
- return ENAMETOOLONG;
- case ERROR_FILE_CORRUPT:
- return EEXIST;
- case ERROR_FILE_EXISTS:
- return EEXIST;
- case ERROR_FILE_INVALID:
- return ENXIO;
- case ERROR_FILE_NOT_FOUND:
- return ENOENT;
- case ERROR_HANDLE_DISK_FULL:
- return ENOSPC;
-#ifdef ENODATA
- case ERROR_HANDLE_EOF:
- return ENODATA;
-#endif
- case ERROR_INVALID_ADDRESS:
- return EINVAL;
- case ERROR_INVALID_AT_INTERRUPT_TIME:
- return EINTR;
- case ERROR_INVALID_BLOCK_LENGTH:
- return EIO;
- case ERROR_INVALID_DATA:
- return EINVAL;
- case ERROR_INVALID_DRIVE:
- return ENODEV;
- case ERROR_INVALID_EA_NAME:
- return EINVAL;
- case ERROR_INVALID_EXE_SIGNATURE:
- return ENOEXEC;
-#ifdef EBADRQC
- case ERROR_INVALID_FUNCTION:
- return EBADRQC;
-#endif
- case ERROR_INVALID_HANDLE:
- return EBADF;
- case ERROR_INVALID_NAME:
- return ENOENT;
- case ERROR_INVALID_PARAMETER:
- return EINVAL;
- case ERROR_INVALID_SIGNAL_NUMBER:
- return EINVAL;
- case ERROR_IOPL_NOT_ENABLED:
- return ENOEXEC;
- case ERROR_IO_DEVICE:
- return EIO;
- case ERROR_IO_INCOMPLETE:
- return EAGAIN;
- case ERROR_IO_PENDING:
- return EAGAIN;
- case ERROR_LOCK_VIOLATION:
- return EBUSY;
- case ERROR_MAX_THRDS_REACHED:
- return EAGAIN;
- case ERROR_META_EXPANSION_TOO_LONG:
- return EINVAL;
- case ERROR_MOD_NOT_FOUND:
- return ENOENT;
-#ifdef EMSGSIZE
- case ERROR_MORE_DATA:
- return EMSGSIZE;
-#endif
- case ERROR_NEGATIVE_SEEK:
- return EINVAL;
- case ERROR_NETNAME_DELETED:
- return ENOENT;
- case ERROR_NOACCESS:
- return EFAULT;
- case ERROR_NONE_MAPPED:
- return EINVAL;
- case ERROR_NONPAGED_SYSTEM_RESOURCES:
- return EAGAIN;
-#ifdef ENOLINK
- case ERROR_NOT_CONNECTED:
- return ENOLINK;
-#endif
- case ERROR_NOT_ENOUGH_MEMORY:
- return ENOMEM;
- case ERROR_NOT_OWNER:
- return EPERM;
-#ifdef ENOMEDIUM
- case ERROR_NOT_READY:
- return ENOMEDIUM;
-#endif
- case ERROR_NOT_SAME_DEVICE:
- return EXDEV;
- case ERROR_NOT_SUPPORTED:
- return ENOSYS;
- case ERROR_NO_DATA:
- return EPIPE;
- case ERROR_NO_DATA_DETECTED:
- return EIO;
-#ifdef ENOMEDIUM
- case ERROR_NO_MEDIA_IN_DRIVE:
- return ENOMEDIUM;
-#endif
-#ifdef ENMFILE
- case ERROR_NO_MORE_FILES:
- return ENMFILE;
-#endif
-#ifdef ENMFILE
- case ERROR_NO_MORE_ITEMS:
- return ENMFILE;
-#endif
- case ERROR_NO_MORE_SEARCH_HANDLES:
- return ENFILE;
- case ERROR_NO_PROC_SLOTS:
- return EAGAIN;
- case ERROR_NO_SIGNAL_SENT:
- return EIO;
- case ERROR_NO_SYSTEM_RESOURCES:
- return EFBIG;
- case ERROR_NO_TOKEN:
- return EINVAL;
- case ERROR_OPEN_FAILED:
- return EIO;
- case ERROR_OPEN_FILES:
- return EAGAIN;
- case ERROR_OUTOFMEMORY:
- return ENOMEM;
- case ERROR_PAGED_SYSTEM_RESOURCES:
- return EAGAIN;
- case ERROR_PAGEFILE_QUOTA:
- return EAGAIN;
- case ERROR_PATH_NOT_FOUND:
- return ENOENT;
- case ERROR_PIPE_BUSY:
- return EBUSY;
- case ERROR_PIPE_CONNECTED:
- return EBUSY;
-#ifdef ECOMM
- case ERROR_PIPE_LISTENING:
- return ECOMM;
- case ERROR_PIPE_NOT_CONNECTED:
- return ECOMM;
-#endif
- case ERROR_POSSIBLE_DEADLOCK:
- return EDEADLOCK;
- case ERROR_PRIVILEGE_NOT_HELD:
- return EPERM;
- case ERROR_PROCESS_ABORTED:
- return EFAULT;
- case ERROR_PROC_NOT_FOUND:
- return ESRCH;
-#ifdef ENONET
- case ERROR_REM_NOT_LIST:
- return ENONET;
-#endif
- case ERROR_SECTOR_NOT_FOUND:
- return EINVAL;
- case ERROR_SEEK:
- return EINVAL;
- case ERROR_SETMARK_DETECTED:
- return EIO;
- case ERROR_SHARING_BUFFER_EXCEEDED:
- return ENOLCK;
- case ERROR_SHARING_VIOLATION:
- return EBUSY;
- case ERROR_SIGNAL_PENDING:
- return EBUSY;
- case ERROR_SIGNAL_REFUSED:
- return EIO;
-#ifdef ELIBBAD
- case ERROR_SXS_CANT_GEN_ACTCTX:
- return ELIBBAD;
-#endif
- case ERROR_THREAD_1_INACTIVE:
- return EINVAL;
- case ERROR_TOO_MANY_LINKS:
- return EMLINK;
- case ERROR_TOO_MANY_OPEN_FILES:
- return EMFILE;
- case ERROR_WAIT_NO_CHILDREN:
- return ECHILD;
- case ERROR_WORKING_SET_QUOTA:
- return EAGAIN;
- case ERROR_WRITE_PROTECT:
- return EROFS;
- default:
- return -1;
- }
-}
-
-void
-set_errno_from_GetLastError(void)
-{
- errno = win32_error_to_errno(GetLastError());
-}
-
-/* Given a Windows-style path, return the number of characters of the prefix
- * that specify the path to the root directory of a drive, or return 0 if the
- * drive is relative (or at least on the current drive, in the case of
- * absolute-but-not-really-absolute paths like \Windows\System32) */
-static size_t
-win32_path_drive_spec_len(const wchar_t *path)
-{
- size_t n = 0;
-
- if (!wcsncmp(path, L"\\\\?\\", 4)) {
- /* \\?\-prefixed path. Check for following drive letter and
- * path separator. */
- if (path[4] != L'\0' && path[5] == L':' &&
- is_any_path_separator(path[6]))
- n = 7;
- } else {
- /* Not a \\?\-prefixed path. Check for an initial drive letter
- * and path separator. */
- if (path[0] != L'\0' && path[1] == L':' &&
- is_any_path_separator(path[2]))
- n = 3;
- }
- /* Include any additional path separators.*/
- if (n > 0)
- while (is_any_path_separator(path[n]))
- n++;
- return n;
-}
-
-bool
-win32_path_is_root_of_drive(const wchar_t *path)
-{
- size_t drive_spec_len;
- wchar_t full_path[32768];
- DWORD ret;
-
- ret = GetFullPathName(path, ARRAY_LEN(full_path), full_path, NULL);
- if (ret > 0 && ret < ARRAY_LEN(full_path))
- path = full_path;
-
- /* Explicit drive letter and path separator? */
- drive_spec_len = win32_path_drive_spec_len(path);
- if (drive_spec_len > 0 && path[drive_spec_len] == L'\0')
- return true;
-
- /* All path separators? */
- for (const wchar_t *p = path; *p != L'\0'; p++)
- if (!is_any_path_separator(*p))
- return false;
- return true;
-}
-
-
-/* Given a path, which may not yet exist, get a set of flags that describe the
- * features of the volume the path is on. */
-int
-win32_get_vol_flags(const wchar_t *path, unsigned *vol_flags_ret,
- bool *supports_SetFileShortName_ret)
-{
- wchar_t *volume;
- BOOL bret;
- DWORD vol_flags;
- size_t drive_spec_len;
- wchar_t filesystem_name[MAX_PATH + 1];
-
- if (supports_SetFileShortName_ret)
- *supports_SetFileShortName_ret = false;
-
- drive_spec_len = win32_path_drive_spec_len(path);
-
- if (drive_spec_len == 0)
- if (path[0] != L'\0' && path[1] == L':') /* Drive-relative path? */
- drive_spec_len = 2;
-
- if (drive_spec_len == 0) {
- /* Path does not start with a drive letter; use the volume of
- * the current working directory. */
- volume = NULL;
- } else {
- /* Path starts with a drive letter (or \\?\ followed by a drive
- * letter); use it. */
- volume = alloca((drive_spec_len + 2) * sizeof(wchar_t));
- wmemcpy(volume, path, drive_spec_len);
- /* Add trailing backslash in case this was a drive-relative
- * path. */
- volume[drive_spec_len] = L'\\';
- volume[drive_spec_len + 1] = L'\0';
- }
- bret = GetVolumeInformation(
- volume, /* lpRootPathName */
- NULL, /* lpVolumeNameBuffer */
- 0, /* nVolumeNameSize */
- NULL, /* lpVolumeSerialNumber */
- NULL, /* lpMaximumComponentLength */
- &vol_flags, /* lpFileSystemFlags */
- filesystem_name, /* lpFileSystemNameBuffer */
- ARRAY_LEN(filesystem_name)); /* nFileSystemNameSize */
- if (!bret) {
- DWORD err = GetLastError();
- WARNING("Failed to get volume information for path \"%ls\"", path);
- win32_error(err);
- vol_flags = 0xffffffff;
- goto out;
- }
-
- if (wcsstr(filesystem_name, L"NTFS")) {
- /* FILE_SUPPORTS_HARD_LINKS is only supported on Windows 7 and later.
- * Force it on anyway if filesystem is NTFS. */
- vol_flags |= FILE_SUPPORTS_HARD_LINKS;
-
- if (supports_SetFileShortName_ret)
- *supports_SetFileShortName_ret = true;
- }
-
-out:
- DEBUG("using vol_flags = %x", vol_flags);
- *vol_flags_ret = vol_flags;
- return 0;
-}
+#include "wimlib/win32_vss.h"
static bool
win32_modify_privilege(const wchar_t *privilege, bool enable)
static bool
win32_modify_capture_privileges(bool enable)
{
- return win32_modify_privilege(SE_BACKUP_NAME, enable)
- && win32_modify_privilege(SE_SECURITY_NAME, enable);
+ bool ok = true;
+ ok &= win32_modify_privilege(SE_BACKUP_NAME, enable);
+ ok &= win32_modify_privilege(SE_SECURITY_NAME, enable);
+ return ok;
}
static bool
win32_modify_apply_privileges(bool enable)
{
- return win32_modify_privilege(SE_RESTORE_NAME, enable)
- && win32_modify_privilege(SE_SECURITY_NAME, enable)
- && win32_modify_privilege(SE_TAKE_OWNERSHIP_NAME, enable);
+ bool ok = true;
+ ok &= win32_modify_privilege(SE_RESTORE_NAME, enable);
+ ok &= win32_modify_privilege(SE_SECURITY_NAME, enable);
+ ok &= win32_modify_privilege(SE_TAKE_OWNERSHIP_NAME, enable);
+ ok &= win32_modify_privilege(SE_MANAGE_VOLUME_NAME, enable);
+ return ok;
}
static void
win32_modify_apply_privileges(false);
}
-HANDLE
-win32_open_existing_file(const wchar_t *path, DWORD dwDesiredAccess)
-{
- return CreateFileW(path,
- dwDesiredAccess,
- FILE_SHARE_READ,
- NULL, /* lpSecurityAttributes */
- OPEN_EXISTING,
- FILE_FLAG_BACKUP_SEMANTICS |
- FILE_FLAG_OPEN_REPARSE_POINT,
- NULL /* hTemplateFile */);
-}
-
-HANDLE
-win32_open_file_data_only(const wchar_t *path)
-{
- return win32_open_existing_file(path, FILE_READ_DATA);
-}
+/* Pointers to dynamically loaded functions */
-#ifndef WITH_NTDLL
-/* Pointers to functions that are not available on all targetted versions of
- * Windows (XP and later). NOTE: The WINAPI annotations seem to be important; I
- * assume it specifies a certain calling convention. */
+NTSTATUS (WINAPI *func_RtlDosPathNameToNtPathName_U_WithStatus)
+ (IN PCWSTR DosName,
+ OUT PUNICODE_STRING NtName,
+ OUT PCWSTR *PartName,
+ OUT PRTL_RELATIVE_NAME_U RelativeName);
-/* Vista and later */
-HANDLE (WINAPI *win32func_FindFirstStreamW)(LPCWSTR lpFileName,
- STREAM_INFO_LEVELS InfoLevel,
- LPVOID lpFindStreamData,
- DWORD dwFlags) = NULL;
+NTSTATUS (WINAPI *func_RtlCreateSystemVolumeInformationFolder)
+ (PCUNICODE_STRING VolumeRootPath);
-/* Vista and later */
-BOOL (WINAPI *win32func_FindNextStreamW)(HANDLE hFindStream,
- LPVOID lpFindStreamData) = NULL;
-#endif /* !WITH_NTDLL */
+static bool acquired_privileges = false;
-/* Vista and later */
-BOOL (WINAPI *win32func_CreateSymbolicLinkW)(const wchar_t *lpSymlinkFileName,
- const wchar_t *lpTargetFileName,
- DWORD dwFlags) = NULL;
+static HMODULE ntdll_handle = NULL;
-static OSVERSIONINFO windows_version_info = {
- .dwOSVersionInfoSize = sizeof(OSVERSIONINFO),
-};
+static int
+init_ntdll(void)
+{
+ ntdll_handle = LoadLibrary(L"ntdll.dll");
-static HMODULE hKernel32 = NULL;
+ if (!ntdll_handle) {
+ ERROR("Unable to load ntdll.dll");
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
-static bool acquired_privileges = false;
+ func_RtlDosPathNameToNtPathName_U_WithStatus =
+ (void *)GetProcAddress(ntdll_handle,
+ "RtlDosPathNameToNtPathName_U_WithStatus");
-bool
-windows_version_is_at_least(unsigned major, unsigned minor)
-{
- return windows_version_info.dwMajorVersion > major ||
- (windows_version_info.dwMajorVersion == major &&
- windows_version_info.dwMinorVersion >= minor);
+ func_RtlCreateSystemVolumeInformationFolder =
+ (void *)GetProcAddress(ntdll_handle,
+ "RtlCreateSystemVolumeInformationFolder");
+ return 0;
}
/* One-time initialization for Windows capture/apply code. */
int
win32_global_init(int init_flags)
{
+ int ret;
+
/* Try to acquire useful privileges. */
if (!(init_flags & WIMLIB_INIT_FLAG_DONT_ACQUIRE_PRIVILEGES)) {
+ ret = WIMLIB_ERR_INSUFFICIENT_PRIVILEGES;
if (!win32_modify_capture_privileges(true))
if (init_flags & WIMLIB_INIT_FLAG_STRICT_CAPTURE_PRIVILEGES)
- goto insufficient_privileges;
+ goto out_drop_privs;
if (!win32_modify_apply_privileges(true))
if (init_flags & WIMLIB_INIT_FLAG_STRICT_APPLY_PRIVILEGES)
- goto insufficient_privileges;
+ goto out_drop_privs;
acquired_privileges = true;
}
- /* Get Windows version information. */
- GetVersionEx(&windows_version_info);
-
- /* Try to dynamically load some functions. */
- if (hKernel32 == NULL)
- hKernel32 = LoadLibrary(L"Kernel32.dll");
-
- if (hKernel32) {
- #ifndef WITH_NTDLL
- win32func_FindFirstStreamW = (void*)GetProcAddress(hKernel32,
- "FindFirstStreamW");
- if (win32func_FindFirstStreamW) {
- win32func_FindNextStreamW = (void*)GetProcAddress(hKernel32,
- "FindNextStreamW");
- if (!win32func_FindNextStreamW)
- win32func_FindFirstStreamW = NULL;
- }
- #endif /* !WITH_NTDLL */
- win32func_CreateSymbolicLinkW = (void*)GetProcAddress(hKernel32,
- "CreateSymbolicLinkW");
- }
+ ret = init_ntdll();
+ if (ret)
+ goto out_drop_privs;
+
return 0;
-insufficient_privileges:
+out_drop_privs:
win32_release_capture_and_apply_privileges();
- return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES;
+ return ret;
}
void
win32_global_cleanup(void)
{
+ vss_global_cleanup();
+
if (acquired_privileges)
win32_release_capture_and_apply_privileges();
- if (hKernel32 != NULL) {
- FreeLibrary(hKernel32);
- hKernel32 = NULL;
+
+ FreeLibrary(ntdll_handle);
+ ntdll_handle = NULL;
+}
+
+/*
+ * Translates a Win32-namespace path into an NT-namespace path.
+ *
+ * On success, returns 0. The NT-namespace path will be stored in the
+ * UNICODE_STRING structure pointed to by nt_path. nt_path->Buffer will be set
+ * to a new buffer that must later be freed with HeapFree(). (Really
+ * RtlHeapFree(), but HeapFree() seems to be the same thing.)
+ *
+ * On failure, returns WIMLIB_ERR_NOMEM or WIMLIB_ERR_INVALID_PARAM.
+ */
+int
+win32_path_to_nt_path(const wchar_t *win32_path, UNICODE_STRING *nt_path)
+{
+ NTSTATUS status;
+
+ if (func_RtlDosPathNameToNtPathName_U_WithStatus) {
+ status = (*func_RtlDosPathNameToNtPathName_U_WithStatus)(win32_path,
+ nt_path,
+ NULL, NULL);
+ } else {
+ if (RtlDosPathNameToNtPathName_U(win32_path, nt_path, NULL, NULL))
+ status = STATUS_SUCCESS;
+ else
+ status = STATUS_NO_MEMORY;
+ }
+
+ if (likely(NT_SUCCESS(status)))
+ return 0;
+
+ if (status == STATUS_NO_MEMORY)
+ return WIMLIB_ERR_NOMEM;
+
+ winnt_error(status, L"\"%ls\": invalid path name", win32_path);
+ return WIMLIB_ERR_INVALID_PARAM;
+}
+
+int
+win32_get_drive_path(const wchar_t *file_path, wchar_t drive_path[7])
+{
+ tchar *file_abspath;
+
+ file_abspath = realpath(file_path, NULL);
+ if (!file_abspath)
+ return WIMLIB_ERR_NOMEM;
+
+ if (file_abspath[0] == L'\0' || file_abspath[1] != L':') {
+ ERROR("\"%ls\": Path format not recognized", file_abspath);
+ FREE(file_abspath);
+ return WIMLIB_ERR_UNSUPPORTED;
}
+
+ wsprintf(drive_path, L"\\\\.\\%lc:", file_abspath[0]);
+ FREE(file_abspath);
+ return 0;
+}
+
+/* Try to attach an instance of the Windows Overlay Filesystem filter driver to
+ * the specified drive (such as C:) */
+bool
+win32_try_to_attach_wof(const wchar_t *drive)
+{
+ HMODULE fltlib;
+ bool retval = false;
+
+ /* Use FilterAttach() from Fltlib.dll. */
+
+ fltlib = LoadLibrary(L"Fltlib.dll");
+
+ if (!fltlib) {
+ WARNING("Failed to load Fltlib.dll");
+ return retval;
+ }
+
+ HRESULT (WINAPI *func_FilterAttach)(LPCWSTR lpFilterName,
+ LPCWSTR lpVolumeName,
+ LPCWSTR lpInstanceName,
+ DWORD dwCreatedInstanceNameLength,
+ LPWSTR lpCreatedInstanceName);
+
+ func_FilterAttach = (void *)GetProcAddress(fltlib, "FilterAttach");
+
+ if (func_FilterAttach) {
+ HRESULT res;
+
+ res = (*func_FilterAttach)(L"wof", drive, NULL, 0, NULL);
+
+ if (res != S_OK)
+ res = (*func_FilterAttach)(L"wofadk", drive, NULL, 0, NULL);
+
+ if (res == S_OK)
+ retval = true;
+ } else {
+ WARNING("FilterAttach() does not exist in Fltlib.dll");
+ }
+
+ FreeLibrary(fltlib);
+
+ return retval;
+}
+
+
+static void
+windows_msg(u32 code, const wchar_t *format, va_list va,
+ bool is_ntstatus, bool is_error)
+{
+ wchar_t _buf[STACK_MAX / 8];
+ wchar_t *buf = _buf;
+ size_t buflen = ARRAY_LEN(_buf);
+ size_t ret;
+ size_t n;
+
+retry:
+ n = vsnwprintf(buf, buflen, format, va);
+
+ if (n >= buflen)
+ goto realloc;
+
+ n += snwprintf(&buf[n], buflen - n,
+ (is_ntstatus ?
+ L" (status=%08"PRIx32"): " :
+ L" (err=%"PRIu32"): "),
+ code);
+
+ if (n >= buflen)
+ goto realloc;
+
+ ret = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
+ FORMAT_MESSAGE_IGNORE_INSERTS |
+ (is_ntstatus ? FORMAT_MESSAGE_FROM_HMODULE : 0),
+ (is_ntstatus ? ntdll_handle : NULL),
+ code,
+ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ &buf[n],
+ buflen - n,
+ NULL);
+ n += ret;
+
+ if (n >= buflen || (ret == 0 && GetLastError() == ERROR_INSUFFICIENT_BUFFER))
+ goto realloc;
+
+ if (buf[n - 1] == L'\n')
+ buf[--n] = L'\0';
+ if (buf[n - 1] == L'\r')
+ buf[--n] = L'\0';
+ if (buf[n - 1] == L'.')
+ buf[--n] = L'\0';
+
+ if (is_error)
+ ERROR("%ls", buf);
+ else
+ WARNING("%ls", buf);
+ if (buf != _buf)
+ FREE(buf);
+ return;
+
+realloc:
+ if (buf != _buf)
+ FREE(buf);
+ buflen *= 2;
+ buf = MALLOC(buflen * sizeof(buf[0]));
+ if (buf)
+ goto retry;
+ ERROR("Ran out of memory while building error message!!!");
+}
+
+void
+win32_warning(DWORD err, const wchar_t *format, ...)
+{
+ va_list va;
+
+ va_start(va, format);
+ windows_msg(err, format, va, false, false);
+ va_end(va);
+}
+
+void
+win32_error(DWORD err, const wchar_t *format, ...)
+{
+ va_list va;
+
+ va_start(va, format);
+ windows_msg(err, format, va, false, true);
+ va_end(va);
+}
+
+void
+winnt_warning(NTSTATUS status, const wchar_t *format, ...)
+{
+ va_list va;
+
+ va_start(va, format);
+ windows_msg(status, format, va, true, false);
+ va_end(va);
+}
+
+void
+winnt_error(NTSTATUS status, const wchar_t *format, ...)
+{
+ va_list va;
+
+ va_start(va, format);
+ windows_msg(status, format, va, true, true);
+ va_end(va);
+}
+
+/*
+ * Synchronously execute a filesystem control method. This is a wrapper around
+ * NtFsControlFile() that handles STATUS_PENDING. Note that SYNCHRONIZE
+ * permission is, in general, required on the handle.
+ */
+NTSTATUS
+winnt_fsctl(HANDLE h, u32 code, const void *in, u32 in_size,
+ void *out, u32 out_size_avail, u32 *actual_out_size_ret)
+{
+ IO_STATUS_BLOCK iosb;
+ NTSTATUS status;
+
+ status = NtFsControlFile(h, NULL, NULL, NULL, &iosb, code,
+ (void *)in, in_size, out, out_size_avail);
+ if (status == STATUS_PENDING) {
+ /* Beware: this case is often encountered with remote
+ * filesystems, but rarely with local filesystems. */
+
+ status = NtWaitForSingleObject(h, FALSE, NULL);
+ if (NT_SUCCESS(status)) {
+ status = iosb.Status;
+ } else {
+ /* We shouldn't be issuing ioctls on a handle to which
+ * we don't have SYNCHRONIZE access. Otherwise we have
+ * no way to wait for them to complete. */
+ wimlib_assert(status != STATUS_ACCESS_DENIED);
+ }
+ }
+
+ if (NT_SUCCESS(status) && actual_out_size_ret != NULL)
+ *actual_out_size_ret = (u32)iosb.Information;
+
+ return status;
}
#endif /* __WIN32__ */
git://wimlib.net / wimlib / blobdiff