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 "edify/expr.h" 23 24 typedef struct _Patch { 25 uint8_t sha1[SHA_DIGEST_SIZE]; 26 const char* patch_filename; 27 } Patch; 28 29 typedef struct _FileContents { 30 uint8_t sha1[SHA_DIGEST_SIZE]; 31 unsigned char* data; 32 ssize_t size; 33 struct stat st; 34 } FileContents; 35 36 // When there isn't enough room on the target filesystem to hold the 37 // patched version of the file, we copy the original here and delete 38 // it to free up space. If the expected source file doesn't exist, or 39 // is corrupted, we look to see if this file contains the bits we want 40 // and use it as the source instead. 41 #define CACHE_TEMP_SOURCE "/cache/saved.file" 42 43 typedef ssize_t (*SinkFn)(unsigned char*, ssize_t, void*); 44 45 // applypatch.c 46 int ShowLicenses(); 47 size_t FreeSpaceForFile(const char* filename); 48 int CacheSizeCheck(size_t bytes); 49 int ParseSha1(const char* str, uint8_t* digest); 50 51 int applypatch(const char* source_filename, 52 const char* target_filename, 53 const char* target_sha1_str, 54 size_t target_size, 55 int num_patches, 56 char** const patch_sha1_str, 57 Value** patch_data); 58 int applypatch_check(const char* filename, 59 int num_patches, 60 char** const patch_sha1_str); 61 62 // Read a file into memory; store it and its associated metadata in 63 // *file. Return 0 on success. 64 int LoadFileContents(const char* filename, FileContents* file); 65 void FreeFileContents(FileContents* file); 66 67 // bsdiff.c 68 void ShowBSDiffLicense(); 69 int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size, 70 const Value* patch, ssize_t patch_offset, 71 SinkFn sink, void* token, SHA_CTX* ctx); 72 int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size, 73 const Value* patch, ssize_t patch_offset, 74 unsigned char** new_data, ssize_t* new_size); 75 76 // imgpatch.c 77 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, 78 const Value* patch, 79 SinkFn sink, void* token, SHA_CTX* ctx); 80 81 // freecache.c 82 int MakeFreeSpaceOnCache(size_t bytes_needed); 83 84 #endif 85
