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/*
* Copyright (C) 2019 The LineageOS Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fstream>
#include "UsbRestrict.h"
#include <android-base/logging.h>
namespace vendor {
namespace lineage {
namespace trust {
namespace V1_0 {
namespace implementation {
static constexpr const char* kControlPath = "/proc/sys/kernel/deny_new_usb";
// Methods from ::vendor::lineage::trust::V1_0::IUsbRestrict follow.
Return<bool> UsbRestrict::isEnabled() {
std::ifstream file(kControlPath);
std::string content;
file >> content;
file.close();
return !file.fail() && std::stoi(content);
}
Return<void> UsbRestrict::setEnabled(bool enabled) {
std::ofstream file(kControlPath);
if (file.is_open()) {
file << (enabled ? "1" : "0");
file.close();
} else {
LOG(ERROR) << "Failed to open " << kControlPath << ", error=" << errno
<< " (" << strerror(errno) << ")";
}
return Void();
}
} // namespace implementation
} // namespace V1_0
} // namespace trust
} // namespace lineage
} // namespace vendor
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