| /* | |
| * 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)](https://man7.org/linux/man-pages/man2/ioctl.2.html) operates on device files. | |
| */ | |
| int ioctl(int __fd, int __op, ...); | |
| #if !defined(BIONIC_IOCTL_NO_SIGNEDNESS_OVERLOAD) | |
| /* | |
| * 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. | |
| * | |
| * The always-true enable_if(1) just exists to break overloading ties. | |
| */ | |
| int ioctl(int __fd, unsigned __op, ...) __overloadable __enable_if(1, "") __RENAME(ioctl); | |
| #endif | |
| __END_DECLS |