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The C and C++ Include Header Files

cat -n /usr/include/x86_64-linux-gnu/bits/termios.h

     1	/* termios type and macro definitions.  Linux version.
     2	   Copyright (C) 1993-2026 Free Software Foundation, Inc.
     3	   This file is part of the GNU C Library.
     4	
     5	   The GNU C Library is free software; you can redistribute it and/or
     6	   modify it under the terms of the GNU Lesser General Public
     7	   License as published by the Free Software Foundation; either
     8	   version 2.1 of the License, or (at your option) any later version.
     9	
    10	   The GNU C Library is distributed in the hope that it will be useful,
    11	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    12	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13	   Lesser General Public License for more details.
    14	
    15	   You should have received a copy of the GNU Lesser General Public
    16	   License along with the GNU C Library; if not, see
    17	   <https://www.gnu.org/licenses/>.  */
    18	
    19	#ifndef _TERMIOS_H
    20	# error "Never include <bits/termios.h> directly; use <termios.h> instead."
    21	#endif
    22	
    23	typedef unsigned char	cc_t;
    24	typedef unsigned int	speed_t;
    25	typedef unsigned int	tcflag_t;
    26	
    27	#ifdef _TERMIOS_H
    28	# include <bits/termios-struct.h>
    29	#endif
    30	
    31	#include <bits/termios-c_cc.h>
    32	#include <bits/termios-c_iflag.h>
    33	#include <bits/termios-c_oflag.h>
    34	
    35	/* c_cflag bit meaning */
    36	#include <bits/termios-c_cflag.h>
    37	
    38	#ifdef __USE_MISC
    39	#define __B0	 0000000	/* hang up */
    40	#define __B50	 0000001
    41	#define __B75	 0000002
    42	#define __B110	 0000003
    43	#define __B134	 0000004
    44	#define __B150	 0000005
    45	#define __B200	 0000006
    46	#define __B300	 0000007
    47	#define __B600	 0000010
    48	#define __B1200	 0000011
    49	#define __B1800	 0000012
    50	#define __B2400	 0000013
    51	#define __B4800	 0000014
    52	#define __B9600  0000015
    53	#define __B19200 0000016
    54	#define __B38400 0000017
    55	#include <bits/termios-cbaud.h>
    56	
    57	# define __EXTA	 __B19200
    58	# define __EXTB	 __B38400
    59	# define BOTHER  __BOTHER
    60	#endif
    61	
    62	#include <bits/termios-c_lflag.h>
    63	
    64	#ifdef __USE_MISC
    65	/* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
    66	# define TIOCSER_TEMT    0x01   /* Transmitter physically empty */
    67	#endif
    68	
    69	/* tcflow() and TCXONC use these */
    70	#define	TCOOFF		0
    71	#define	TCOON		1
    72	#define	TCIOFF		2
    73	#define	TCION		3
    74	
    75	/* tcflush() and TCFLSH use these */
    76	#define	TCIFLUSH	0
    77	#define	TCOFLUSH	1
    78	#define	TCIOFLUSH	2
    79	
    80	#include <bits/termios-tcflow.h>
    81	
    82	#include <bits/termios-misc.h>
    83	
    84	#include <bits/termios-baud.h>