1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _APPLYPATCH_H 18 #define _APPLYPATCH_H 19 20 #include <sys/stat.h> 21 #include "mincrypt/sha.h" 22 #include "minelf/Retouch.h" 23 #include "edify/expr.h" 24 25 typedef struct _Patch { 26 uint8_t sha1[SHA_DIGEST_SIZE]; 27 const char* patch_filename; 28 } Patch; 29 30 typedef struct _FileContents { 31 uint8_t sha1[SHA_DIGEST_SIZE]; 32 unsigned char* data; 33 ssize_t size; 34 struct stat st; 35 } FileContents; 36 37 // When there isn't enough room on the target filesystem to hold the 38 // patched version of the file, we copy the original here and delete 39 // it to free up space. If the expected source file doesn't exist, or 40 // is corrupted, we look to see if this file contains the bits we want 41 // and use it as the source instead. 42 #define CACHE_TEMP_SOURCE "/cache/saved.file" 43 44 typedef ssize_t (*SinkFn)(unsigned char*, ssize_t, void*); 45 46 // applypatch.c 47 int ShowLicenses(); 48 size_t FreeSpaceForFile(const char* filename); 49 int CacheSizeCheck(size_t bytes); 50 int ParseSha1(const char* str, uint8_t* digest); 51 52 int applypatch(const char* source_filename, 53 const char* target_filename, 54 const char* target_sha1_str, 55 size_t target_size, 56 int num_patches, 57 char** const patch_sha1_str, 58 Value** patch_data, 59 Value* bonus_data); 60 int applypatch_check(const char* filename, 61 int num_patches, 62 char** const patch_sha1_str); 63 64 int LoadFileContents(const char* filename, FileContents* file, 65 int retouch_flag); 66 int SaveFileContents(const char* filename, const FileContents* file); 67 void FreeFileContents(FileContents* file); 68 int FindMatchingPatch(uint8_t* sha1, const char** patch_sha1_str, 69 int num_patches); 70 71 // bsdiff.c 72 void ShowBSDiffLicense(); 73 int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size, 74 const Value* patch, ssize_t patch_offset, 75 SinkFn sink, void* token, SHA_CTX* ctx); 76 int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size, 77 const Value* patch, ssize_t patch_offset, 78 unsigned char** new_data, ssize_t* new_size); 79 80 // imgpatch.c 81 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, 82 const Value* patch, 83 SinkFn sink, void* token, SHA_CTX* ctx, 84 const Value* bonus_data); 85 86 // freecache.c 87 int MakeFreeSpaceOnCache(size_t bytes_needed); 88 89 #endif 90