]> wimlib.net Git - wimlib/blobdiff - src/extract.c
win32_apply.c: set_short_name(): Zero buffer
[wimlib] / src / extract.c
index 3cc9959d27df0ebf57bd98853adcff152e1a52fd..0029aa88016097b161ac515f61ffbbacf3c27cff 100644 (file)
         WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE  |       \
         WIMLIB_EXTRACT_FLAG_WIMBOOT)
 
+/* Send WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE or
+ * WIMLIB_PROGRESS_MSG_EXTRACT_METADATA.  */
+int
+do_file_extract_progress(struct apply_ctx *ctx, enum wimlib_progress_msg msg)
+{
+       ctx->count_until_file_progress = 500;  /* Arbitrary value to limit calls  */
+       return extract_progress(ctx, msg);
+}
+
+static int
+start_file_phase(struct apply_ctx *ctx, uint64_t end_file_count, enum wimlib_progress_msg msg)
+{
+       ctx->progress.extract.current_file_count = 0;
+       ctx->progress.extract.end_file_count = end_file_count;
+       return do_file_extract_progress(ctx, msg);
+}
+
+int
+start_file_structure_phase(struct apply_ctx *ctx, uint64_t end_file_count)
+{
+       return start_file_phase(ctx, end_file_count, WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE);
+}
+
+int
+start_file_metadata_phase(struct apply_ctx *ctx, uint64_t end_file_count)
+{
+       return start_file_phase(ctx, end_file_count, WIMLIB_PROGRESS_MSG_EXTRACT_METADATA);
+}
+
+static int
+end_file_phase(struct apply_ctx *ctx, enum wimlib_progress_msg msg)
+{
+       ctx->progress.extract.current_file_count = ctx->progress.extract.end_file_count;
+       return do_file_extract_progress(ctx, msg);
+}
+
+int
+end_file_structure_phase(struct apply_ctx *ctx)
+{
+       return end_file_phase(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE);
+}
+
+int
+end_file_metadata_phase(struct apply_ctx *ctx)
+{
+       return end_file_phase(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_METADATA);
+}
+
 /* Check whether the extraction of a dentry should be skipped completely.  */
 static bool
 dentry_is_supported(struct wim_dentry *dentry,
@@ -217,7 +265,7 @@ load_streams_from_pipe(struct apply_ctx *ctx,
                        lte_unbind_wim_resource_spec(found_lte);
                        lte_bind_wim_resource_spec(needed_lte, rspec);
 
-                       ret = (*cbs->begin_stream)(needed_lte, 0,
+                       ret = (*cbs->begin_stream)(needed_lte,
                                                   cbs->begin_stream_ctx);
                        if (ret) {
                                lte_unbind_wim_resource_spec(needed_lte);
@@ -260,7 +308,7 @@ load_streams_from_pipe(struct apply_ctx *ctx,
        }
        ret = 0;
 out:
-       if (found_lte->resource_location != RESOURCE_IN_WIM)
+       if (found_lte && found_lte->resource_location != RESOURCE_IN_WIM)
                FREE(rspec);
        free_lookup_table_entry(found_lte);
        return ret;
@@ -306,18 +354,17 @@ retry:
 }
 
 static int
-begin_extract_stream_wrapper(struct wim_lookup_table_entry *lte,
-                            u32 flags, void *_ctx)
+begin_extract_stream_wrapper(struct wim_lookup_table_entry *lte, void *_ctx)
 {
        struct apply_ctx *ctx = _ctx;
 
        ctx->cur_stream = lte;
+       ctx->cur_stream_offset = 0;
 
        if (unlikely(lte->out_refcnt > MAX_OPEN_STREAMS))
                return create_temporary_file(&ctx->tmpfile_fd, &ctx->tmpfile_name);
        else
-               return (*ctx->saved_cbs->begin_stream)(lte, flags,
-                                                      ctx->saved_cbs->begin_stream_ctx);
+               return (*ctx->saved_cbs->begin_stream)(lte, ctx->saved_cbs->begin_stream_ctx);
 }
 
 static int
@@ -327,9 +374,13 @@ extract_chunk_wrapper(const void *chunk, size_t size, void *_ctx)
        union wimlib_progress_info *progress = &ctx->progress;
        int ret;
 
+       ctx->cur_stream_offset += size;
+
        if (likely(ctx->supported_features.hard_links)) {
                progress->extract.completed_bytes +=
                        (u64)size * ctx->cur_stream->out_refcnt;
+               if (ctx->cur_stream_offset == ctx->cur_stream->size)
+                       progress->extract.completed_streams += ctx->cur_stream->out_refcnt;
        } else {
                const struct stream_owner *owners = stream_owners(ctx->cur_stream);
                for (u32 i = 0; i < ctx->cur_stream->out_refcnt; i++) {
@@ -341,6 +392,8 @@ extract_chunk_wrapper(const void *chunk, size_t size, void *_ctx)
                                            d_extraction_alias_node)
                        {
                                progress->extract.completed_bytes += size;
+                               if (ctx->cur_stream_offset == ctx->cur_stream->size)
+                                       progress->extract.completed_streams++;
                        }
                }
        }
@@ -396,9 +449,13 @@ extract_from_tmpfile(const tchar *tmpfile_name, struct apply_ctx *ctx)
 {
        struct wim_lookup_table_entry tmpfile_lte;
        struct wim_lookup_table_entry *orig_lte = ctx->cur_stream;
-       const struct stream_owner *owners = stream_owners(orig_lte);
        const struct read_stream_list_callbacks *cbs = ctx->saved_cbs;
        int ret;
+       const u32 orig_refcnt = orig_lte->out_refcnt;
+
+       BUILD_BUG_ON(MAX_OPEN_STREAMS < ARRAY_LEN(orig_lte->inline_stream_owners));
+
+       struct stream_owner *owners = orig_lte->stream_owners;
 
        /* Copy the stream's data from the temporary file to each of its
         * destinations.
@@ -410,10 +467,8 @@ extract_from_tmpfile(const tchar *tmpfile_name, struct apply_ctx *ctx)
        memcpy(&tmpfile_lte, orig_lte, sizeof(struct wim_lookup_table_entry));
        tmpfile_lte.resource_location = RESOURCE_IN_FILE_ON_DISK;
        tmpfile_lte.file_on_disk = ctx->tmpfile_name;
-       tmpfile_lte.out_refcnt = 1;
-
-       for (u32 i = 0; i < orig_lte->out_refcnt; i++) {
-               tmpfile_lte.inline_stream_owners[0] = owners[i];
+       ret = 0;
+       for (u32 i = 0; i < orig_refcnt; i++) {
 
                /* Note: it usually doesn't matter whether we pass the original
                 * stream entry to callbacks provided by the extraction backend
@@ -424,10 +479,12 @@ extract_from_tmpfile(const tchar *tmpfile_name, struct apply_ctx *ctx)
                 * because it needs the original stream location in order to
                 * create the external backing reference.  */
 
-               ret = (*cbs->begin_stream)(orig_lte, 0,
-                                          cbs->begin_stream_ctx);
+               orig_lte->out_refcnt = 1;
+               orig_lte->inline_stream_owners[0] = owners[i];
+
+               ret = (*cbs->begin_stream)(orig_lte, cbs->begin_stream_ctx);
                if (ret)
-                       return ret;
+                       break;
 
                /* Extra SHA-1 isn't necessary here, but it shouldn't hurt as
                 * this case is very rare anyway.  */
@@ -435,10 +492,13 @@ extract_from_tmpfile(const tchar *tmpfile_name, struct apply_ctx *ctx)
                                     cbs->consume_chunk,
                                     cbs->consume_chunk_ctx);
 
-               return (*cbs->end_stream)(orig_lte, ret,
-                                         cbs->end_stream_ctx);
+               ret = (*cbs->end_stream)(orig_lte, ret, cbs->end_stream_ctx);
+               if (ret)
+                       break;
        }
-       return 0;
+       FREE(owners);
+       orig_lte->out_refcnt = 0;
+       return ret;
 }
 
 static int
@@ -964,7 +1024,7 @@ ref_stream(struct wim_lookup_table_entry *lte, u32 stream_idx,
                return 0;
 
        ctx->progress.extract.total_bytes += lte->size;
-       ctx->progress.extract.num_streams++;
+       ctx->progress.extract.total_streams++;
 
        if (inode->i_visited)
                return 0;
@@ -1020,23 +1080,43 @@ ref_stream(struct wim_lookup_table_entry *lte, u32 stream_idx,
 }
 
 static int
-dentry_ref_streams(struct wim_dentry *dentry, struct apply_ctx *ctx)
+ref_unnamed_stream(struct wim_dentry *dentry, struct apply_ctx *ctx)
 {
        struct wim_inode *inode = dentry->d_inode;
        int ret;
+       u16 stream_idx;
+       struct wim_lookup_table_entry *stream;
 
-       /* The unnamed data stream will always be extracted, except in an
-        * unlikely case.  */
-       if (!inode_is_encrypted_directory(inode)) {
-               u16 stream_idx;
-               struct wim_lookup_table_entry *stream;
+       if (unlikely(inode_is_encrypted_directory(inode)))
+               return 0;
 
-               stream = inode_unnamed_stream_resolved(inode, &stream_idx);
-               ret = ref_stream(stream, stream_idx, dentry, ctx);
-               if (ret)
-                       return ret;
+       if (unlikely(ctx->apply_ops->will_externally_back)) {
+               ret = (*ctx->apply_ops->will_externally_back)(dentry, ctx);
+               if (ret >= 0) {
+                       if (ret) /* Error */
+                               return ret;
+                       /* Will externally back */
+                       return 0;
+               }
+               /* Won't externally back */
        }
 
+       stream = inode_unnamed_stream_resolved(inode, &stream_idx);
+       return ref_stream(stream, stream_idx, dentry, ctx);
+}
+
+static int
+dentry_ref_streams(struct wim_dentry *dentry, struct apply_ctx *ctx)
+{
+       struct wim_inode *inode = dentry->d_inode;
+       int ret;
+
+       /* The unnamed data stream will almost always be extracted, but there
+        * exist cases in which it won't be.  */
+       ret = ref_unnamed_stream(dentry, ctx);
+       if (ret)
+               return ret;
+
        /* Named data streams will be extracted only if supported in the current
         * extraction mode and volume, and to avoid complications, if not doing
         * a linked extraction.  */
@@ -1373,6 +1453,7 @@ extract_trees(WIMStruct *wim, struct wim_dentry **trees, size_t num_trees,
        }
        INIT_LIST_HEAD(&ctx->stream_list);
        filedes_invalidate(&ctx->tmpfile_fd);
+       ctx->apply_ops = ops;
 
        ret = (*ops->get_supported_features)(target, &ctx->supported_features);
        if (ret)
@@ -1460,23 +1541,20 @@ out:
 static int
 mkdir_if_needed(const tchar *target)
 {
-       struct stat stbuf;
-       if (tstat(target, &stbuf)) {
-               if (errno == ENOENT) {
-                       if (tmkdir(target, 0755)) {
-                               ERROR_WITH_ERRNO("Failed to create directory "
-                                                "\"%"TS"\"", target);
-                               return WIMLIB_ERR_MKDIR;
-                       }
-               } else {
-                       ERROR_WITH_ERRNO("Failed to stat \"%"TS"\"", target);
-                       return WIMLIB_ERR_STAT;
-               }
-       } else if (!S_ISDIR(stbuf.st_mode)) {
-               ERROR("\"%"TS"\" is not a directory", target);
-               return WIMLIB_ERR_NOTDIR;
-       }
-       return 0;
+       if (!tmkdir(target, 0755))
+               return 0;
+
+       if (errno == EEXIST)
+               return 0;
+
+#ifdef __WIN32__
+       /* _wmkdir() fails with EACCES if called on a drive root directory.  */
+       if (errno == EACCES)
+               return 0;
+#endif
+
+       ERROR_WITH_ERRNO("Failed to create directory \"%"TS"\"", target);
+       return WIMLIB_ERR_MKDIR;
 }
 
 /* Make sure the extraction flags make sense, and update them if needed.  */
@@ -1507,12 +1585,16 @@ check_extract_flags(const WIMStruct *wim, int *extract_flags_p)
        }
 #endif
 
-#ifndef __WIN32__
        if (extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT) {
+#ifdef __WIN32__
+               if (!wim->filename)
+                       return WIMLIB_ERR_NO_FILENAME;
+#else
                ERROR("WIMBoot extraction is only supported on Windows!");
                return WIMLIB_ERR_UNSUPPORTED;
-       }
 #endif
+       }
+
 
        if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX |
                              WIMLIB_EXTRACT_FLAG_NORPFIX |