48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/*
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* Copyright (C) 2019 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 "utility.h"
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "super_vbmeta_format.h"
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using android::base::ErrnoError;
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using android::base::Error;
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using android::base::Result;
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namespace android {
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namespace fs_mgr {
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Result<uint64_t> GetFileSize(int fd) {
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struct stat sb;
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if (fstat(fd, &sb) == -1) {
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return ErrnoError() << "Couldn't get the file size";
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}
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return sb.st_size;
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}
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uint64_t IndexOffset(const uint8_t vbmeta_index) {
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/* There are primary and backup vbmeta table in super_vbmeta,
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so SUPER_VBMETA_TABLE_MAX_SIZE is counted twice. */
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return 2 * SUPER_VBMETA_TABLE_MAX_SIZE + vbmeta_index * VBMETA_IMAGE_MAX_SIZE;
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}
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} // namespace fs_mgr
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} // namespace android
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