3a1bccd9f2
Sdcardfs is only used if present in the kernel, and
external_storage.sdcardfs.enabled=0. For compatibility, this property
defaults to 1.
Bug: 155222498
Test: mount|grep "type sdcardfs" should find nothing after boot complete
if external_storage.sdcardfs.enabled=0
Change-Id: Ide648405c260ac46d07877c3a7b78a8bee48e09a
44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
/*
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* Copyright (C) 2020 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 FRAMEWORKS_BASE_CORE_JNI_MISC_UTILS_H_
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#define FRAMEWORKS_BASE_CORE_JNI_MISC_UTILS_H_
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#include <android-base/file.h>
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#include <android-base/logging.h>
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#include <android-base/properties.h>
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#include <fcntl.h>
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#include <linux/fs.h>
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namespace {
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static constexpr const char* kExternalStorageSdcardfs = "external_storage.sdcardfs.enabled";
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static bool IsFilesystemSupported(const std::string& fsType) {
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std::string supported;
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if (!android::base::ReadFileToString("/proc/filesystems", &supported)) {
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ALOGE("Failed to read supported filesystems");
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return false;
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}
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return supported.find(fsType + "\n") != std::string::npos;
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}
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static inline bool IsSdcardfsUsed() {
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return IsFilesystemSupported("sdcardfs") &&
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android::base::GetBoolProperty(kExternalStorageSdcardfs, true);
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}
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} // namespace
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#endif // FRAMEWORKS_BASE_CORE_JNI_MISC_UTILS_H_
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