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/*
* Copyright (C) 2011 The Android Open Source 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.
*/
package android.system;
import android.util.MutableInt;
import androidx.annotation.RequiresApi;
import libcore.util.NonNull;
import java.io.FileDescriptor;
/**
* Access to low-level system functionality. Most of these are system calls. Most users will want
* to use higher-level APIs where available, but this class provides access to the underlying
* primitives used to implement the higher-level APIs.
*
* The corresponding constants can be found in {@link OsConstants}.
*/
public final class Os {
private Os() {
}
public static int ioctlInt(FileDescriptor fd, int cmd, MutableInt arg) throws ErrnoException {
throw new ErrnoException();
}
/**
* @hide
*/
//@libcore.api.CorePlatformApi
@RequiresApi(27)
public static int ioctlInt(FileDescriptor fd, int cmd, Int32Ref arg) throws ErrnoException {
throw new IllegalStateException("STUB");
}
/**
* See ioctl(3).
* System call manipulates the underlying device parameters of special files. In particular,
* many operating characteristics of character special files.
*
* @param fd an open file descriptor
* @param cmd encoded in it whether the argument is an "in" parameter or "out" parameter
* @return returns a nonnegative value on success
* @throws ErrnoException A checked exception thrown when {@link Os} methods fail.
* {@see android.system.ErrnoException}
* @hide
*/
// @SystemApi(client = MODULE_LIBRARIES)
// @libcore.api.CorePlatformApi(status = libcore.api.CorePlatformApi.Status.STABLE)
@RequiresApi(31)
public static int ioctlInt(@NonNull FileDescriptor fd, int cmd) throws ErrnoException {
throw new IllegalStateException("STUB");
}
}