/*
* Copyright (C) 2012, 2013 Eric Biggers
*
- * wimlib - Library for working with WIM files
- *
* This file is part of wimlib, a library for working with WIM files.
*
* wimlib is free software; you can redistribute it and/or modify it under the
* along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "wimlib/error.h"
+#include "wimlib/dentry.h"
+#include "wimlib/encoding.h"
+#include "wimlib/file_io.h"
+#include "wimlib/integrity.h"
+#include "wimlib/lookup_table.h"
+#include "wimlib/metadata.h"
+#ifdef WITH_NTFS_3G
+# include "wimlib/ntfs_3g.h" /* for do_ntfs_umount() */
+#endif
+#include "wimlib/security.h"
+#include "wimlib/wim.h"
+#include "wimlib/xml.h"
+
+#ifdef __WIN32__
+# include "wimlib/win32.h" /* for realpath() replacement */
+#endif
#include <errno.h>
#include <fcntl.h>
+#ifndef __WIN32__
+# include <langinfo.h>
+#endif
#include <limits.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
-#ifdef __WIN32__
-# include "win32.h"
-#else
-# include <langinfo.h>
-#endif
-
-#include "buffer_io.h"
-#include "dentry.h"
-#include "lookup_table.h"
-#include "wimlib_internal.h"
-#include "xml.h"
-
static int
image_print_metadata(WIMStruct *w)
{
DEBUG("Printing metadata for image %d", w->current_image);
- print_security_data(wim_security_data(w));
+ print_wim_security_data(wim_security_data(w));
return for_dentry_in_tree(wim_root_dentry(w), print_dentry,
w->lookup_table);
}
}
static WIMStruct *
-new_wim_struct()
+new_wim_struct(void)
{
WIMStruct *w = CALLOC(1, sizeof(WIMStruct));
if (w) {
goto out_free;
}
w->lookup_table = table;
+ w->refcnts_ok = 1;
*w_ret = w;
return 0;
out_free:
/* Sets the index of the bootable image. */
WIMLIBAPI int
-wimlib_set_boot_idx(WIMStruct *w, int boot_idx)
+wimlib_set_boot_idx(WIMStruct *wim, int boot_idx)
{
- if (w->hdr.total_parts != 1) {
- ERROR("Cannot modify the boot index of a split WIM!");
- return WIMLIB_ERR_SPLIT_UNSUPPORTED;
- }
- if (boot_idx < 0 || boot_idx > w->hdr.image_count)
+ int ret;
+
+ ret = can_modify_wim(wim);
+ if (ret)
+ return ret;
+ if (boot_idx < 0 || boot_idx > wim->hdr.image_count)
return WIMLIB_ERR_INVALID_IMAGE;
- w->hdr.boot_idx = boot_idx;
+ wim->hdr.boot_idx = boot_idx;
return 0;
}
return WIMLIB_ERR_OPEN;
}
- ret = read_header(w->filename, w->in_fd, &w->hdr, open_flags);
+ ret = read_header(w->filename, w->in_fd, &w->hdr);
if (ret)
return ret;
+ if (open_flags & WIMLIB_OPEN_FLAG_WRITE_ACCESS) {
+ ret = can_modify_wim(w);
+ if (ret)
+ return ret;
+ }
+
+ if (w->hdr.total_parts != 1 && !(open_flags & WIMLIB_OPEN_FLAG_SPLIT_OK)) {
+ ERROR("\"%"TS"\": This WIM is part %u of a %u-part WIM",
+ w->filename, w->hdr.part_number, w->hdr.total_parts);
+ return WIMLIB_ERR_SPLIT_UNSUPPORTED;
+ }
+
DEBUG("According to header, WIM contains %u images", w->hdr.image_count);
/* If the boot index is invalid, print a warning and set it to 0 */
*/
WIMLIBAPI int
wimlib_open_wim(const tchar *wim_file, int open_flags,
- WIMStruct **w_ret,
+ WIMStruct **wim_ret,
wimlib_progress_func_t progress_func)
{
- WIMStruct *w;
+ WIMStruct *wim;
int ret;
- if (!wim_file || !w_ret)
- return WIMLIB_ERR_INVALID_PARAM;
+ ret = WIMLIB_ERR_INVALID_PARAM;
+ if (!wim_file || !wim_ret)
+ goto out;
- w = new_wim_struct();
- if (!w)
- return WIMLIB_ERR_NOMEM;
+ ret = WIMLIB_ERR_NOMEM;
+ wim = new_wim_struct();
+ if (!wim)
+ goto out;
- ret = begin_read(w, wim_file, open_flags, progress_func);
- if (ret == 0)
- *w_ret = w;
- else
- wimlib_free(w);
+ ret = begin_read(wim, wim_file, open_flags, progress_func);
+ if (ret)
+ goto out_wimlib_free;
+
+ ret = 0;
+ *wim_ret = wim;
+ goto out;
+out_wimlib_free:
+ wimlib_free(wim);
+out:
return ret;
}
{
free_dentry_tree(imd->root_dentry, table);
imd->root_dentry = NULL;
- free_security_data(imd->security_data);
+ free_wim_security_data(imd->security_data);
imd->security_data = NULL;
if (free_metadata_lte) {
struct wim_image_metadata *
-new_image_metadata()
+new_image_metadata(void)
{
struct wim_image_metadata *imd;
return 0;
}
+/*
+ * can_modify_wim - Check if a given WIM is writeable. This is only the case if
+ * it meets the following three conditions:
+ *
+ * 1. Write access is allowed to the underlying file (if any) at the filesystem level.
+ * 2. The WIM is not part of a spanned set.
+ * 3. The WIM_HDR_FLAG_READONLY flag is not set in the WIM header.
+ *
+ * Return value is 0 if writable; WIMLIB_ERR_WIM_IS_READONLY otherwise.
+ */
+int
+can_modify_wim(WIMStruct *wim)
+{
+ if (wim->filename) {
+ if (taccess(wim->filename, W_OK)) {
+ ERROR_WITH_ERRNO("Can't modify \"%"TS"\"", wim->filename);
+ return WIMLIB_ERR_WIM_IS_READONLY;
+ }
+ }
+ if (wim->hdr.total_parts != 1) {
+ ERROR("Cannot modify \"%"TS"\": is part of a spanned set",
+ wim->filename);
+ return WIMLIB_ERR_WIM_IS_READONLY;
+ }
+ if (wim->hdr.flags & WIM_HDR_FLAG_READONLY) {
+ ERROR("Cannot modify \"%"TS"\": is marked read-only",
+ wim->filename);
+ return WIMLIB_ERR_WIM_IS_READONLY;
+ }
+ return 0;
+}
+
+/*
+ * can_delete_from_wim - Check if files or images can be deleted from a given
+ * WIM file.
+ *
+ * This theoretically should be exactly the same as can_modify_wim(), but
+ * unfortunately, due to bugs in Microsoft's software that generate incorrect
+ * reference counts for some WIM resources, we need to run expensive
+ * verifications to make sure the reference counts are correct on all WIM
+ * resources. Otherwise we might delete a WIM resource whose reference count
+ * has fallen to 0, but is actually still referenced somewhere.
+ */
+int
+can_delete_from_wim(WIMStruct *wim)
+{
+ int ret;
+
+ ret = can_modify_wim(wim);
+ if (ret)
+ return ret;
+ if (!wim->refcnts_ok)
+ wim_recalculate_refcnts(wim);
+ return 0;
+}
+
/* Frees the memory for the WIMStruct, including all internal memory; also
* closes all files associated with the WIMStruct. */
WIMLIBAPI void
}
static bool
-test_locale_ctype_utf8()
+test_locale_ctype_utf8(void)
{
#ifdef __WIN32__
return false;
/* Free global memory allocations. Not strictly necessary if the process using
* wimlib is just about to exit (as is the case for 'imagex'). */
WIMLIBAPI void
-wimlib_global_cleanup()
+wimlib_global_cleanup(void)
{
libxml_global_cleanup();
iconv_global_cleanup();
git://wimlib.net / wimlib / blobdiff