/*
* 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));
-#ifdef WITH_FUSE
- if (pthread_mutex_init(&w->fp_tab_mutex, NULL) != 0) {
- ERROR_WITH_ERRNO("Failed to initialize mutex");
- FREE(w);
- w = NULL;
+ if (w) {
+ w->in_fd = -1;
+ w->out_fd = -1;
}
-#endif
return w;
-
}
/*
return 0;
}
-/* Returns the compression type given in the flags of a WIM header. */
-static int
-wim_hdr_flags_compression_type(int wim_hdr_flags)
-{
- if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESSION) {
- if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESS_LZX)
- return WIMLIB_COMPRESSION_TYPE_LZX;
- else if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESS_XPRESS)
- return WIMLIB_COMPRESSION_TYPE_XPRESS;
- else
- return WIMLIB_COMPRESSION_TYPE_INVALID;
- } else {
- return WIMLIB_COMPRESSION_TYPE_NONE;
- }
-}
-
/*
* Creates a WIMStruct for a new WIM file.
*/
goto out_free;
}
w->lookup_table = table;
+ w->refcnts_ok = 1;
+ w->compression_type = ctype;
*w_ret = w;
return 0;
out_free:
}
w->current_image = image;
imd = wim_get_current_image_metadata(w);
- if (imd->root_dentry) {
+ if (imd->root_dentry || imd->modified) {
ret = 0;
} else {
#ifdef ENABLE_DEBUG
WIMLIBAPI int
wimlib_get_compression_type(const WIMStruct *w)
{
- return wim_hdr_flags_compression_type(w->hdr.flags);
+ return w->compression_type;
}
WIMLIBAPI const tchar *
tputchar(T('\n'));
tprintf(T("Image Count: %d\n"), hdr->image_count);
tprintf(T("Compression: %"TS"\n"),
- wimlib_get_compression_type_string(wimlib_get_compression_type(w)));
+ wimlib_get_compression_type_string(w->compression_type));
tprintf(T("Part Number: %d/%d\n"), hdr->part_number, hdr->total_parts);
tprintf(T("Boot Index: %d\n"), hdr->boot_idx);
tprintf(T("Size: %"PRIu64" bytes\n"),
wim_info_get_total_bytes(w->wim_info));
tprintf(T("Integrity Info: %"TS"\n"),
(w->hdr.integrity.offset != 0) ? T("yes") : T("no"));
+ tprintf(T("Relative path junction: %"TS"\n"),
+ (hdr->flags & WIM_HDR_FLAG_RP_FIX) ? T("yes") : T("no"));
tputchar(T('\n'));
}
/* 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 w->hdr.boot_idx;
}
+static int
+do_open_wim(const tchar *filename, int *fd_ret)
+{
+ int fd;
+
+ fd = topen(filename, O_RDONLY | O_BINARY);
+ if (fd == -1) {
+ ERROR_WITH_ERRNO("Can't open \"%"TS"\" read-only", filename);
+ return WIMLIB_ERR_OPEN;
+ }
+ *fd_ret = fd;
+ return 0;
+}
+
+int
+reopen_wim(WIMStruct *w)
+{
+ wimlib_assert(w->in_fd == -1);
+ return do_open_wim(w->filename, &w->in_fd);
+}
+
+int
+close_wim(WIMStruct *w)
+{
+ if (w->in_fd != -1) {
+ close(w->in_fd);
+ w->in_fd = -1;
+ }
+ return 0;
+}
+
/*
* Begins the reading of a WIM file; opens the file and reads its header and
* lookup table, and optionally checks the integrity.
DEBUG("Reading the WIM file `%"TS"'", in_wim_path);
- w->fp = tfopen(in_wim_path, T("rb"));
- if (!w->fp) {
- ERROR_WITH_ERRNO("Failed to open `%"TS"' for reading",
- in_wim_path);
- return WIMLIB_ERR_OPEN;
- }
+ ret = do_open_wim(in_wim_path, &w->in_fd);
+ if (ret)
+ return ret;
/* The absolute path to the WIM is requested so that wimlib_overwrite()
* still works even if the process changes its working directory. This
return WIMLIB_ERR_OPEN;
}
- ret = read_header(w->fp, &w->hdr, open_flags);
+ ret = read_header(w->filename, w->in_fd, &w->hdr);
if (ret)
return ret;
+ if (w->hdr.flags & WIM_HDR_FLAG_WRITE_IN_PROGRESS) {
+ WARNING("The WIM_HDR_FLAG_WRITE_IN_PROGRESS is set in the header of \"%"TS"\".\n"
+ " It may be being changed by another process, or a process\n"
+ " may have crashed while writing the WIM.", in_wim_path);
+ }
+
+ 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",
+ in_wim_path, 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 */
w->hdr.boot_idx = 0;
}
- if (wimlib_get_compression_type(w) == WIMLIB_COMPRESSION_TYPE_INVALID) {
- ERROR("Invalid compression type (WIM header flags = 0x%x)",
- w->hdr.flags);
- return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
+ /* Check and cache the compression type */
+ if (w->hdr.flags & WIM_HDR_FLAG_COMPRESSION) {
+ if (w->hdr.flags & WIM_HDR_FLAG_COMPRESS_LZX) {
+ if (w->hdr.flags & WIM_HDR_FLAG_COMPRESS_XPRESS) {
+ ERROR("Multiple compression flags are set in \"%"TS"\"",
+ in_wim_path);
+ return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
+ }
+ w->compression_type = WIMLIB_COMPRESSION_TYPE_LZX;
+ } else if (w->hdr.flags & WIM_HDR_FLAG_COMPRESS_XPRESS) {
+ w->compression_type = WIMLIB_COMPRESSION_TYPE_XPRESS;
+ } else {
+ ERROR("The compression flag is set on \"%"TS"\", but "
+ "neither the XPRESS nor LZX flag is set",
+ in_wim_path);
+ return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
+ }
+ } else {
+ BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_NONE != 0);
}
if (open_flags & WIMLIB_OPEN_FLAG_CHECK_INTEGRITY) {
if (ret)
return ret;
- ret = read_xml_data(w->fp, &w->hdr.xml_res_entry,
- &w->xml_data, &w->wim_info);
+ ret = read_xml_data(w->in_fd, &w->hdr.xml_res_entry, &w->wim_info);
if (ret)
return ret;
*/
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) {
INIT_LIST_HEAD(&imd->inode_list);
#ifdef WITH_NTFS_3G
if (imd->ntfs_vol) {
- do_ntfs_umount(imd->ntfs_vol);
+ do_ntfs_umount(imd->ntfs_vol);
imd->ntfs_vol = NULL;
}
#endif
struct wim_image_metadata *
-new_image_metadata()
+new_image_metadata(void)
{
struct wim_image_metadata *imd;
int ret;
for (int i = 0; i < w->hdr.image_count; i++) {
struct wim_lookup_table_entry *lte, *tmp;
- list_for_each_entry_safe(lte, tmp,
- &w->image_metadata[i]->unhashed_streams,
- unhashed_list)
- {
+ struct wim_image_metadata *imd = w->image_metadata[i];
+ image_for_each_unhashed_stream_safe(lte, tmp, imd) {
ret = hash_unhashed_stream(lte, w->lookup_table, NULL);
if (ret)
return ret;
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
if (!w)
return;
- if (w->fp)
- fclose(w->fp);
- if (w->out_fp)
- fclose(w->out_fp);
-
-#ifdef WITH_FUSE
- if (w->fp_tab) {
- for (size_t i = 0; i < w->num_allocated_fps; i++)
- if (w->fp_tab[i])
- fclose(w->fp_tab[i]);
- FREE(w->fp_tab);
- }
- pthread_mutex_destroy(&w->fp_tab_mutex);
-#endif
+ if (w->in_fd != -1)
+ close(w->in_fd);
+ if (w->out_fd != -1)
+ close(w->out_fd);
free_lookup_table(w->lookup_table);
FREE(w->filename);
- FREE(w->xml_data);
free_wim_info(w->wim_info);
if (w->image_metadata) {
for (unsigned i = 0; i < w->hdr.image_count; i++)
}
static bool
-test_locale_ctype_utf8()
+test_locale_ctype_utf8(void)
{
#ifdef __WIN32__
return false;
#endif
}
-/* Get global memory allocations out of the way,
- * single-threaded programs like 'imagex'. */
WIMLIBAPI int
-wimlib_global_init()
+wimlib_global_init(int init_flags)
{
libxml_global_init();
-#ifdef WITH_NTFS_3G
- libntfs3g_global_init();
-#endif
- wimlib_mbs_is_utf8 = test_locale_ctype_utf8();
+ if (!(init_flags & WIMLIB_INIT_FLAG_ASSUME_UTF8)) {
+ wimlib_mbs_is_utf8 = test_locale_ctype_utf8();
+ #ifdef WITH_NTFS_3G
+ if (!wimlib_mbs_is_utf8)
+ libntfs3g_global_init();
+ #endif
+ }
#ifdef __WIN32__
win32_global_init();
#endif
/* 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