#include <errno.h>
-#include "wimlib/win32_common.h"
+#ifdef WITH_NTDLL
+# include <winternl.h>
+#endif
+#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
+static int
win32_error_to_errno(DWORD err_code)
{
/* This mapping is that used in Cygwin.
}
}
+
+void
+set_errno_from_win32_error(DWORD err)
+{
+ errno = win32_error_to_errno(err);
+}
+
void
set_errno_from_GetLastError(void)
{
- errno = win32_error_to_errno(GetLastError());
+ set_errno_from_win32_error(GetLastError());
+}
+
+#ifdef WITH_NTDLL
+void
+set_errno_from_nt_status(NTSTATUS status)
+{
+ set_errno_from_win32_error((*func_RtlNtStatusToDosError)(status));
+}
+#endif
+
+/* 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)
+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 (path[0] != L'\0' && path[0] != L'\\' &&
- path[0] != L'/' && path[1] == L':')
- {
- /* Path starts with a drive letter; use it. */
- volume = alloca(4 * sizeof(wchar_t));
- volume[0] = path[0];
- volume[1] = path[1];
- volume[2] = L'\\';
- volume[3] = L'\0';
- } else {
+ 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 = GetVolumeInformationW(volume, /* lpRootPathName */
- NULL, /* lpVolumeNameBuffer */
- 0, /* nVolumeNameSize */
- NULL, /* lpVolumeSerialNumber */
- NULL, /* lpMaximumComponentLength */
- &vol_flags, /* lpFileSystemFlags */
- NULL, /* lpFileSystemNameBuffer */
- 0); /* nFileSystemNameSize */
+ 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);
+ set_errno_from_GetLastError();
+ WARNING_WITH_ERRNO("Failed to get volume information for "
+ "path \"%ls\"", path);
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;
}
-HANDLE
-win32_open_existing_file(const wchar_t *path, DWORD dwDesiredAccess)
+static bool
+win32_modify_privilege(const wchar_t *privilege, bool enable)
{
- return CreateFileW(path,
- dwDesiredAccess,
- FILE_SHARE_READ,
- NULL, /* lpSecurityAttributes */
- OPEN_EXISTING,
- FILE_FLAG_BACKUP_SEMANTICS |
- FILE_FLAG_OPEN_REPARSE_POINT,
- NULL /* hTemplateFile */);
+ HANDLE hToken;
+ LUID luid;
+ TOKEN_PRIVILEGES newState;
+ bool ret = FALSE;
+
+ if (!OpenProcessToken(GetCurrentProcess(),
+ TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,
+ &hToken))
+ goto out;
+
+ if (!LookupPrivilegeValue(NULL, privilege, &luid))
+ goto out_close_handle;
+
+ newState.PrivilegeCount = 1;
+ newState.Privileges[0].Luid = luid;
+ newState.Privileges[0].Attributes = (enable ? SE_PRIVILEGE_ENABLED : 0);
+ SetLastError(ERROR_SUCCESS);
+ ret = AdjustTokenPrivileges(hToken, FALSE, &newState, 0, NULL, NULL);
+ if (ret && GetLastError() == ERROR_NOT_ALL_ASSIGNED)
+ ret = FALSE;
+out_close_handle:
+ CloseHandle(hToken);
+out:
+ return ret;
+}
+
+static bool
+win32_modify_capture_privileges(bool enable)
+{
+ return win32_modify_privilege(SE_BACKUP_NAME, enable)
+ && win32_modify_privilege(SE_SECURITY_NAME, enable);
+}
+
+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);
+}
+
+static void
+win32_release_capture_and_apply_privileges(void)
+{
+ win32_modify_capture_privileges(false);
+ win32_modify_apply_privileges(false);
}
HANDLE
-win32_open_file_data_only(const wchar_t *path)
+win32_open_existing_file(const wchar_t *path, DWORD dwDesiredAccess)
{
- return win32_open_existing_file(path, FILE_READ_DATA);
+ return CreateFile(path,
+ dwDesiredAccess,
+ FILE_SHARE_READ,
+ NULL, /* lpSecurityAttributes */
+ OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS |
+ FILE_FLAG_OPEN_REPARSE_POINT,
+ NULL /* hTemplateFile */);
}
/* Pointers to functions that are not available on all targetted versions of
BOOL (WINAPI *win32func_FindNextStreamW)(HANDLE hFindStream,
LPVOID lpFindStreamData) = NULL;
+/* Vista and later */
+BOOL (WINAPI *win32func_CreateSymbolicLinkW)(const wchar_t *lpSymlinkFileName,
+ const wchar_t *lpTargetFileName,
+ DWORD dwFlags) = NULL;
+
+#ifdef WITH_NTDLL
+
+DWORD (WINAPI *func_RtlNtStatusToDosError)(NTSTATUS status);
+
+NTSTATUS (WINAPI *func_NtQueryInformationFile)(HANDLE FileHandle,
+ PIO_STATUS_BLOCK IoStatusBlock,
+ PVOID FileInformation,
+ ULONG Length,
+ FILE_INFORMATION_CLASS FileInformationClass);
+
+NTSTATUS (WINAPI *func_NtQuerySecurityObject)(HANDLE handle,
+ SECURITY_INFORMATION SecurityInformation,
+ PSECURITY_DESCRIPTOR SecurityDescriptor,
+ ULONG Length,
+ PULONG LengthNeeded);
+
+NTSTATUS (WINAPI *func_NtQueryDirectoryFile) (HANDLE FileHandle,
+ HANDLE Event,
+ PIO_APC_ROUTINE ApcRoutine,
+ PVOID ApcContext,
+ PIO_STATUS_BLOCK IoStatusBlock,
+ PVOID FileInformation,
+ ULONG Length,
+ FILE_INFORMATION_CLASS FileInformationClass,
+ BOOLEAN ReturnSingleEntry,
+ PUNICODE_STRING FileName,
+ BOOLEAN RestartScan);
+
+NTSTATUS (WINAPI *func_NtSetSecurityObject)(HANDLE Handle,
+ SECURITY_INFORMATION SecurityInformation,
+ PSECURITY_DESCRIPTOR SecurityDescriptor);
+
+NTSTATUS (WINAPI *func_RtlCreateSystemVolumeInformationFolder)
+ (PCUNICODE_STRING VolumeRootPath);
+
+#endif /* WITH_NTDLL */
+
static OSVERSIONINFO windows_version_info = {
.dwOSVersionInfoSize = sizeof(OSVERSIONINFO),
};
static HMODULE hKernel32 = NULL;
+#ifdef WITH_NTDLL
+static HMODULE hNtdll = NULL;
+#endif
+
+static bool acquired_privileges = false;
+
bool
windows_version_is_at_least(unsigned major, unsigned minor)
{
windows_version_info.dwMinorVersion >= minor);
}
-/* Try to dynamically load some functions */
-void
-win32_global_init(void)
+/* One-time initialization for Windows capture/apply code. */
+int
+win32_global_init(int init_flags)
{
- DWORD err;
-
- if (hKernel32 == NULL) {
- DEBUG("Loading Kernel32.dll");
- hKernel32 = LoadLibraryW(L"Kernel32.dll");
- if (hKernel32 == NULL) {
- err = GetLastError();
- WARNING("Can't load Kernel32.dll");
- win32_error(err);
- }
+ /* Try to acquire useful privileges. */
+ if (!(init_flags & WIMLIB_INIT_FLAG_DONT_ACQUIRE_PRIVILEGES)) {
+ if (!win32_modify_capture_privileges(true))
+ if (init_flags & WIMLIB_INIT_FLAG_STRICT_CAPTURE_PRIVILEGES)
+ goto insufficient_privileges;
+ if (!win32_modify_apply_privileges(true))
+ if (init_flags & WIMLIB_INIT_FLAG_STRICT_APPLY_PRIVILEGES)
+ goto insufficient_privileges;
+ 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) {
win32func_FindFirstStreamW = (void*)GetProcAddress(hKernel32,
"FindFirstStreamW");
if (!win32func_FindNextStreamW)
win32func_FindFirstStreamW = NULL;
}
+ win32func_CreateSymbolicLinkW = (void*)GetProcAddress(hKernel32,
+ "CreateSymbolicLinkW");
}
- GetVersionEx(&windows_version_info);
+#ifdef WITH_NTDLL
+ if (hNtdll == NULL)
+ hNtdll = LoadLibrary(L"ntdll.dll");
+
+ if (hNtdll) {
+ func_RtlNtStatusToDosError =
+ (void*)GetProcAddress(hNtdll, "RtlNtStatusToDosError");
+ if (func_RtlNtStatusToDosError) {
+
+ func_NtQuerySecurityObject =
+ (void*)GetProcAddress(hNtdll, "NtQuerySecurityObject");
+
+ func_NtQueryDirectoryFile =
+ (void*)GetProcAddress(hNtdll, "NtQueryDirectoryFile");
+
+ func_NtQueryInformationFile =
+ (void*)GetProcAddress(hNtdll, "NtQueryInformationFile");
+
+ func_NtSetSecurityObject =
+ (void*)GetProcAddress(hNtdll, "NtSetSecurityObject");
+ func_RtlCreateSystemVolumeInformationFolder =
+ (void*)GetProcAddress(hNtdll, "RtlCreateSystemVolumeInformationFolder");
+ }
+ }
+
+ DEBUG("FindFirstStreamW @ %p", win32func_FindFirstStreamW);
+ DEBUG("FindNextStreamW @ %p", win32func_FindNextStreamW);
+ DEBUG("CreateSymbolicLinkW @ %p", win32func_CreateSymbolicLinkW);
+ DEBUG("RtlNtStatusToDosError @ %p", func_RtlNtStatusToDosError);
+ DEBUG("NtQuerySecurityObject @ %p", func_NtQuerySecurityObject);
+ DEBUG("NtQueryDirectoryFile @ %p", func_NtQueryDirectoryFile);
+ DEBUG("NtQueryInformationFile @ %p", func_NtQueryInformationFile);
+ DEBUG("NtSetSecurityObject @ %p", func_NtSetSecurityObject);
+ DEBUG("RtlCreateSystemVolumeInformationFolder @ %p",
+ func_RtlCreateSystemVolumeInformationFolder);
+#endif
+
+ return 0;
+
+insufficient_privileges:
+ win32_release_capture_and_apply_privileges();
+ return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES;
}
void
win32_global_cleanup(void)
{
+ if (acquired_privileges)
+ win32_release_capture_and_apply_privileges();
if (hKernel32 != NULL) {
- DEBUG("Closing Kernel32.dll");
FreeLibrary(hKernel32);
hKernel32 = NULL;
}
+#ifdef WITH_NTDLL
+ if (hNtdll != NULL) {
+ FreeLibrary(hNtdll);
+ hNtdll = NULL;
+ }
+#endif
}
#endif /* __WIN32__ */
git://wimlib.net / wimlib / blobdiff