| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| /** |
| * @file bits/ioctl.h |
| * @brief The ioctl() function. |
| */ |
| |
| #include <sys/cdefs.h> |
| |
| __BEGIN_DECLS |
| |
| /** |
| * [ioctl(2)](http://man7.org/linux/man-pages/man2/ioctl.2.html) operates on device files. |
| */ |
| int ioctl(int __fd, int __request, ...); |
| |
| /* |
| * Work around unsigned -> signed conversion warnings: many common ioctl |
| * constants are unsigned. |
| * |
| * Since this workaround introduces an overload to ioctl, it's possible that it |
| * will break existing code that takes the address of ioctl. If such a breakage |
| * occurs, you can work around it by either: |
| * - specifying a concrete, correct type for ioctl (whether it be through a cast |
| * in `(int (*)(int, int, ...))ioctl`, creating a temporary variable with the |
| * type of the ioctl you prefer, ...), or |
| * - defining BIONIC_IOCTL_NO_SIGNEDNESS_OVERLOAD, which will make the |
| * overloading go away. |
| */ |
| #if !defined(BIONIC_IOCTL_NO_SIGNEDNESS_OVERLOAD) |
| /* enable_if(1) just exists to break overloading ties. */ |
| int ioctl(int __fd, unsigned __request, ...) __overloadable __enable_if(1, "") __RENAME(ioctl); |
| #endif |
| |
| __END_DECLS |
