#include "wimlib/apply.h"
#include "wimlib/error.h"
#include "wimlib/lookup_table.h"
+#include "wimlib/xml.h"
+#include "wimlib/wim.h"
+#include "wimlib/wimboot.h"
+
+static void
+ctx_save_data_source_id(struct apply_ctx *ctx, u64 data_source_id)
+{
+ ctx->private[0] = data_source_id & 0xFFFFFFFF;
+ ctx->private[1] = data_source_id >> 32;
+}
+
+static u64
+ctx_get_data_source_id(const struct apply_ctx *ctx)
+{
+ return (u32)ctx->private[0] | ((u64)(u32)ctx->private[1] << 32);
+}
static int
win32_start_extract(const wchar_t *path, struct apply_ctx *ctx)
if (supports_SetFileShortName)
ctx->supported_features.short_names = 1;
- return 0;
-}
-/* Create a normal file, overwriting one already present. */
-static int
-win32_create_file(const wchar_t *path, struct apply_ctx *ctx, u64 *cookie_ret)
-{
- HANDLE h;
- unsigned retry_count = 0;
- DWORD dwFlagsAndAttributes = FILE_FLAG_BACKUP_SEMANTICS;
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT) {
-retry:
- /* WRITE_OWNER and WRITE_DAC privileges are required for some reason,
- * even through we're creating a new file. */
- h = CreateFile(path, WRITE_OWNER | WRITE_DAC, 0, NULL,
- CREATE_ALWAYS, dwFlagsAndAttributes, NULL);
- if (h == INVALID_HANDLE_VALUE) {
- /* File couldn't be created. */
- DWORD err = GetLastError();
- if (err == ERROR_ACCESS_DENIED && retry_count == 0) {
+ u64 data_source_id;
- /* Access denied error for the first time. Try
- * adjusting file attributes. */
+ if (!wim_info_get_wimboot(ctx->wim->wim_info,
+ ctx->wim->current_image))
+ WARNING("Image is not marked as WIMBoot compatible!");
- /* Get attributes of the existing file. */
- DWORD attribs = GetFileAttributes(path);
- if (attribs != INVALID_FILE_ATTRIBUTES &&
- (attribs & (FILE_ATTRIBUTE_HIDDEN |
- FILE_ATTRIBUTE_SYSTEM |
- FILE_ATTRIBUTE_READONLY)))
- {
- /* If the existing file has
- * FILE_ATTRIBUTE_HIDDEN and/or
- * FILE_ATTRIBUTE_SYSTEM, they must be set in
- * the call to CreateFile(). This is true even
- * when FILE_ATTRIBUTE_NORMAL was not specified,
- * contrary to the MS "documentation". */
- dwFlagsAndAttributes |= (attribs &
- (FILE_ATTRIBUTE_HIDDEN |
- FILE_ATTRIBUTE_SYSTEM));
- /* If the existing file has
- * FILE_ATTRIBUTE_READONLY, it must be cleared
- * before attempting to create a new file over
- * it. This is true even when the process has
- * the SE_RESTORE_NAME privilege and requested
- * the FILE_FLAG_BACKUP_SEMANTICS flag to
- * CreateFile(). */
- if (attribs & FILE_ATTRIBUTE_READONLY) {
- SetFileAttributes(path,
- attribs & ~FILE_ATTRIBUTE_READONLY);
- }
- retry_count++;
- goto retry;
- }
- }
- set_errno_from_win32_error(err);
- return WIMLIB_ERR_OPEN;
+ ret = wimboot_alloc_data_source_id(ctx->wim->filename,
+ ctx->wim->current_image,
+ path, &data_source_id);
+ if (ret)
+ return ret;
+
+ ctx_save_data_source_id(ctx, data_source_id);
}
- CloseHandle(h);
- return 0;
-}
-static int
-win32_create_directory(const wchar_t *path, struct apply_ctx *ctx,
- u64 *cookie_ret)
-{
- if (!CreateDirectory(path, NULL))
- if (GetLastError() != ERROR_ALREADY_EXISTS)
- goto error;
return 0;
-
-error:
- set_errno_from_GetLastError();
- return WIMLIB_ERR_MKDIR;
}
/* Delete a non-directory file, working around Windows quirks. */
static BOOL
win32_delete_file_wrapper(const wchar_t *path)
{
- DWORD attrib;
DWORD err;
+ DWORD attrib;
if (DeleteFile(path))
return TRUE;
err = GetLastError();
attrib = GetFileAttributes(path);
- if (attrib & FILE_ATTRIBUTE_READONLY) {
+ if ((attrib != INVALID_FILE_ATTRIBUTES) &&
+ (attrib & FILE_ATTRIBUTE_READONLY))
+ {
/* Try again with FILE_ATTRIBUTE_READONLY cleared. */
attrib &= ~FILE_ATTRIBUTE_READONLY;
if (SetFileAttributes(path, attrib)) {
return FALSE;
}
+
+/* Create a normal file, overwriting one already present. */
+static int
+win32_create_file(const wchar_t *path, struct apply_ctx *ctx, u64 *cookie_ret)
+{
+ HANDLE h;
+
+ /* Notes:
+ *
+ * WRITE_OWNER and WRITE_DAC privileges are required for some reason,
+ * even through we're creating a new file.
+ *
+ * FILE_FLAG_OPEN_REPARSE_POINT is required to prevent an existing
+ * reparse point from redirecting the creation of the new file
+ * (potentially to an arbitrary location).
+ *
+ * CREATE_ALWAYS could be used instead of CREATE_NEW. However, there
+ * are quirks that would need to be handled (e.g. having to set
+ * FILE_ATTRIBUTE_HIDDEN and/or FILE_ATTRIBUTE_SYSTEM if the existing
+ * file had them specified, and/or having to clear
+ * FILE_ATTRIBUTE_READONLY on the existing file). It's simpler to just
+ * call win32_delete_file_wrapper() to delete the existing file in such
+ * a way that already handles the FILE_ATTRIBUTE_READONLY quirk.
+ */
+retry:
+ h = CreateFile(path, WRITE_OWNER | WRITE_DAC, 0, NULL, CREATE_NEW,
+ FILE_FLAG_BACKUP_SEMANTICS |
+ FILE_FLAG_OPEN_REPARSE_POINT, NULL);
+ if (h == INVALID_HANDLE_VALUE) {
+ DWORD err = GetLastError();
+
+ if (err == ERROR_FILE_EXISTS && win32_delete_file_wrapper(path))
+ goto retry;
+ set_errno_from_win32_error(err);
+ return WIMLIB_ERR_OPEN;
+ }
+ CloseHandle(h);
+ return 0;
+}
+
+static int
+win32_create_directory(const wchar_t *path, struct apply_ctx *ctx,
+ u64 *cookie_ret)
+{
+ if (!CreateDirectory(path, NULL))
+ if (GetLastError() != ERROR_ALREADY_EXISTS)
+ goto error;
+ return 0;
+
+error:
+ set_errno_from_GetLastError();
+ return WIMLIB_ERR_MKDIR;
+}
+
static int
win32_create_hardlink(const wchar_t *oldpath, const wchar_t *newpath,
struct apply_ctx *ctx)
struct wim_lookup_table_entry *lte,
struct apply_ctx *ctx)
{
+ if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT
+ && lte
+ && lte->resource_location == RESOURCE_IN_WIM
+ && lte->rspec->wim == ctx->wim)
+ {
+ return wimboot_set_pointer(file.path,
+ ctx_get_data_source_id(ctx),
+ lte->hash);
+ }
+
return win32_extract_stream(file.path, NULL, 0, lte, ctx);
}
git://wimlib.net / wimlib / blobdiff