|  | /* Copyright (C) 1991-2016 Free Software Foundation, Inc. | 
|  | This file is part of the GNU C Library. | 
|  |  | 
|  | The GNU C Library is free software; you can redistribute it and/or | 
|  | modify it under the terms of the GNU Lesser General Public | 
|  | License as published by the Free Software Foundation; either | 
|  | version 2.1 of the License, or (at your option) any later version. | 
|  |  | 
|  | The GNU C Library is distributed in the hope that it will be useful, | 
|  | but WITHOUT ANY WARRANTY; without even the implied warranty of | 
|  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 
|  | Lesser General Public License for more details. | 
|  |  | 
|  | You should have received a copy of the GNU Lesser General Public | 
|  | License along with the GNU C Library; if not, see | 
|  | <http://www.gnu.org/licenses/>.  */ | 
|  |  | 
|  | #ifndef	_SYS_IOCTL_H | 
|  | #define	_SYS_IOCTL_H	1 | 
|  |  | 
|  | #include <features.h> | 
|  |  | 
|  | __BEGIN_DECLS | 
|  |  | 
|  | /* Get the list of `ioctl' requests and related constants.  */ | 
|  | #include <bits/ioctls.h> | 
|  |  | 
|  | /* Define some types used by `ioctl' requests.  */ | 
|  | #include <bits/ioctl-types.h> | 
|  |  | 
|  | /* On a Unix system, the system <sys/ioctl.h> probably defines some of | 
|  | the symbols we define in <sys/ttydefaults.h> (usually with the same | 
|  | values).  The code to generate <bits/ioctls.h> has omitted these | 
|  | symbols to avoid the conflict, but a Unix program expects <sys/ioctl.h> | 
|  | to define them, so we must include <sys/ttydefaults.h> here.  */ | 
|  | #include <sys/ttydefaults.h> | 
|  |  | 
|  | /* Perform the I/O control operation specified by REQUEST on FD. | 
|  | One argument may follow; its presence and type depend on REQUEST. | 
|  | Return value depends on REQUEST.  Usually -1 indicates error.  */ | 
|  | extern int ioctl (int __fd, unsigned long int __request, ...) __THROW; | 
|  |  | 
|  | __END_DECLS | 
|  |  | 
|  | #endif /* sys/ioctl.h */ |