The C and C++ Include Header Files

/usr/include/x86_64-linux-gnu/sys/ioctl.h


$ cat -n /usr/include/x86_64-linux-gnu/sys/ioctl.h

     1	/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
     2	   This file is part of the GNU C Library.
     3	
     4	   The GNU C Library is free software; you can redistribute it and/or
     5	   modify it under the terms of the GNU Lesser General Public
     6	   License as published by the Free Software Foundation; either
     7	   version 2.1 of the License, or (at your option) any later version.
     8	
     9	   The GNU C Library is distributed in the hope that it will be useful,
    10	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    11	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12	   Lesser General Public License for more details.
    13	
    14	   You should have received a copy of the GNU Lesser General Public
    15	   License along with the GNU C Library; if not, see
    16	   <https://www.gnu.org/licenses/>.  */
    17	
    18	#ifndef	_SYS_IOCTL_H
    19	#define	_SYS_IOCTL_H	1
    20	
    21	#include <features.h>
    22	
    23	__BEGIN_DECLS
    24	
    25	/* Get the list of `ioctl' requests and related constants.  */
    26	#include <bits/ioctls.h>
    27	
    28	/* Define some types used by `ioctl' requests.  */
    29	#include <bits/ioctl-types.h>
    30	
    31	/* On a Unix system, the system <sys/ioctl.h> probably defines some of
    32	   the symbols we define in <sys/ttydefaults.h> (usually with the same
    33	   values).  The code to generate <bits/ioctls.h> has omitted these
    34	   symbols to avoid the conflict, but a Unix program expects <sys/ioctl.h>
    35	   to define them, so we must include <sys/ttydefaults.h> here.  */
    36	#include <sys/ttydefaults.h>
    37	
    38	/* Perform the I/O control operation specified by REQUEST on FD.
    39	   One argument may follow; its presence and type depend on REQUEST.
    40	   Return value depends on REQUEST.  Usually -1 indicates error.  */
    41	#ifndef __USE_TIME_BITS64
    42	extern int ioctl (int __fd, unsigned long int __request, ...) __THROW;
    43	#else
    44	# ifdef __REDIRECT
    45	extern int __REDIRECT_NTH (ioctl, (int __fd, unsigned long int __request, ...),
    46				   __ioctl_time64);
    47	# else
    48	extern int __ioctl_time64 (int __fd, unsigned long int __request, ...) __THROW;
    49	#  define ioctl __ioctl_time64
    50	# endif
    51	#endif
    52	
    53	__END_DECLS
    54	
    55	#endif /* sys/ioctl.h */