relocate applypatch; add type system and new functions to edify
- Move applypatch to this package (from build).
- Add a rudimentary type system to edify: instead of just returning a
char*, functions now return a Value*, which is a struct that can
carry different types of value (currently just STRING and BLOB).
Convert all functions to this new scheme.
- Change the one-argument form of package_extract_file to return a
Value of the new BLOB type.
- Add read_file() to load a local file and return a blob, and
sha1_check() to test a blob (or string) against a set of possible
sha1s. read_file() uses the file-loading code from applypatch so it
can read MTD partitions as well.
This is the start of better integration between applypatch and the
rest of edify.
b/2361316 - VZW Issue PP628: Continuous reset to Droid logo:
framework-res.apk update failed (CR LIBtt59130)
Change-Id: Ibd038074749a4d515de1f115c498c6c589ee91e5
diff --git a/applypatch/applypatch.h b/applypatch/applypatch.h
new file mode 100644
index 0000000..3cb8021
--- /dev/null
+++ b/applypatch/applypatch.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _APPLYPATCH_H
+#define _APPLYPATCH_H
+
+#include <sys/stat.h>
+#include "mincrypt/sha.h"
+
+typedef struct _Patch {
+ uint8_t sha1[SHA_DIGEST_SIZE];
+ const char* patch_filename;
+} Patch;
+
+typedef struct _FileContents {
+ uint8_t sha1[SHA_DIGEST_SIZE];
+ unsigned char* data;
+ ssize_t size;
+ struct stat st;
+} FileContents;
+
+// When there isn't enough room on the target filesystem to hold the
+// patched version of the file, we copy the original here and delete
+// it to free up space. If the expected source file doesn't exist, or
+// is corrupted, we look to see if this file contains the bits we want
+// and use it as the source instead.
+#define CACHE_TEMP_SOURCE "/cache/saved.file"
+
+typedef ssize_t (*SinkFn)(unsigned char*, ssize_t, void*);
+
+// applypatch.c
+size_t FreeSpaceForFile(const char* filename);
+int applypatch(int argc, char** argv);
+
+// Read a file into memory; store it and its associated metadata in
+// *file. Return 0 on success.
+int LoadFileContents(const char* filename, FileContents* file);
+void FreeFileContents(FileContents* file);
+
+// bsdiff.c
+void ShowBSDiffLicense();
+int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size,
+ const char* patch_filename, ssize_t offset,
+ SinkFn sink, void* token, SHA_CTX* ctx);
+int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size,
+ const char* patch_filename, ssize_t patch_offset,
+ unsigned char** new_data, ssize_t* new_size);
+
+// imgpatch.c
+int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
+ const char* patch_filename,
+ SinkFn sink, void* token, SHA_CTX* ctx);
+
+// freecache.c
+int MakeFreeSpaceOnCache(size_t bytes_needed);
+
+#endif