#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(DWORD status)
+{
+ set_errno_from_win32_error(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
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;
}
return 0;
}
+static bool
+win32_modify_privilege(const wchar_t *privilege, bool enable)
+{
+ 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_existing_file(const wchar_t *path, DWORD dwDesiredAccess)
{
NULL /* hTemplateFile */);
}
-HANDLE
-win32_open_file_data_only(const wchar_t *path)
-{
- return win32_open_existing_file(path, FILE_READ_DATA);
-}
-
+#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. */
/* Vista and later */
BOOL (WINAPI *win32func_FindNextStreamW)(HANDLE hFindStream,
LPVOID lpFindStreamData) = NULL;
+#endif /* !WITH_NTDLL */
+
+/* Vista and later */
+BOOL (WINAPI *win32func_CreateSymbolicLinkW)(const wchar_t *lpSymlinkFileName,
+ const wchar_t *lpTargetFileName,
+ DWORD dwFlags) = NULL;
static OSVERSIONINFO windows_version_info = {
.dwOSVersionInfoSize = sizeof(OSVERSIONINFO),
static HMODULE hKernel32 = NULL;
+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) {
+ #ifndef WITH_NTDLL
win32func_FindFirstStreamW = (void*)GetProcAddress(hKernel32,
"FindFirstStreamW");
if (win32func_FindFirstStreamW) {
if (!win32func_FindNextStreamW)
win32func_FindFirstStreamW = NULL;
}
+ #endif /* !WITH_NTDLL */
+ win32func_CreateSymbolicLinkW = (void*)GetProcAddress(hKernel32,
+ "CreateSymbolicLinkW");
}
+ return 0;
- GetVersionEx(&windows_version_info);
+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;
}
git://wimlib.net / wimlib / blobdiff