ea2912f187
The fuse data provider for adb/sdcard shares common code and structures. This cl creates a FuseDataProvider base class and provides implementations for adb and sdcard. In the follow cls, we can kill the provider_vtab struct; and also add another implementation to parse a block map file and provides data. Test: unit tests pass, sideload a package, apply a package from sdcard Change-Id: If8311666a52a2e3c0fbae0ee9688fa6d01e4ad09
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*
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* Copyright (C) 2014 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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#include "fuse_adb_provider.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <functional>
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#include "adb.h"
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#include "adb_io.h"
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#include "fuse_sideload.h"
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bool FuseAdbDataProvider::ReadBlockAlignedData(uint8_t* buffer, uint32_t fetch_size,
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uint32_t start_block) const {
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if (!WriteFdFmt(fd_, "%08u", start_block)) {
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fprintf(stderr, "failed to write to adb host: %s\n", strerror(errno));
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return false;
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}
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if (!ReadFdExactly(fd_, buffer, fetch_size)) {
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fprintf(stderr, "failed to read from adb host: %s\n", strerror(errno));
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return false;
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}
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return true;
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}
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void FuseAdbDataProvider::Close() {
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WriteFdExactly(fd_, "DONEDONE");
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}
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int run_adb_fuse(android::base::unique_fd&& sfd, uint64_t file_size, uint32_t block_size) {
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FuseAdbDataProvider adb_data_reader(std::move(sfd), file_size, block_size);
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provider_vtab vtab;
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vtab.read_block = std::bind(&FuseAdbDataProvider::ReadBlockAlignedData, &adb_data_reader,
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std::placeholders::_2, std::placeholders::_3, std::placeholders::_1);
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vtab.close = [&adb_data_reader]() { adb_data_reader.Close(); };
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return run_fuse_sideload(vtab, file_size, block_size);
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}
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