5da317e51d
Modify applypatch to be able to write MTD partitions as well as read them. Make applypatch save a backup copy of the contents of an MTD partition it reads in cache, to be used in case an update is interrupted while writing back to MTD. Modify OTA package creation script to send boot image updates in patch form.
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _APPLYPATCH_H
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#define _APPLYPATCH_H
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#include "mincrypt/sha.h"
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typedef struct _Patch {
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uint8_t sha1[SHA_DIGEST_SIZE];
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const char* patch_filename;
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} Patch;
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typedef struct _FileContents {
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uint8_t sha1[SHA_DIGEST_SIZE];
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unsigned char* data;
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size_t size;
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struct stat st;
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} FileContents;
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// When there isn't enough room on the target filesystem to hold the
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// patched version of the file, we copy the original here and delete
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// it to free up space. If the expected source file doesn't exist, or
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// is corrupted, we look to see if this file contains the bits we want
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// and use it as the source instead.
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#define CACHE_TEMP_SOURCE "/cache/saved.file"
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// When writing to an MTD partition, we first put the output in this
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// temp file, then copy it to the partition once the patching is
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// finished (and the target sha1 verified).
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#define MTD_TARGET_TEMP_FILE "/tmp/mtd-temp"
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// applypatch.c
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size_t FreeSpaceForFile(const char* filename);
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// bsdiff.c
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void ShowBSDiffLicense();
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int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size,
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const char* patch_filename, ssize_t offset,
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FILE* output, SHA_CTX* ctx);
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int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size,
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const char* patch_filename, ssize_t patch_offset,
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unsigned char** new_data, ssize_t* new_size);
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// imgpatch.c
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int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
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const char* patch_filename,
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FILE* output, SHA_CTX* ctx);
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// freecache.c
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int MakeFreeSpaceOnCache(size_t bytes_needed);
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#endif
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