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The C and C++ Include Header Files

cat -n /usr/include/termios.h

     1	/* Copyright (C) 1991-2026 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	/*
    19	 *	POSIX Standard: 7.1-2 General Terminal Interface	<termios.h>
    20	 */
    21	
    22	#ifndef	_TERMIOS_H
    23	#define	_TERMIOS_H	1
    24	
    25	#include <features.h>
    26	#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
    27	/* We need `pid_t'.  */
    28	# include <bits/types.h>
    29	# ifndef __pid_t_defined
    30	typedef __pid_t pid_t;
    31	#  define __pid_t_defined
    32	# endif
    33	#endif
    34	
    35	__BEGIN_DECLS
    36	
    37	/* Get the system-dependent definitions of `struct termios', `tcflag_t',
    38	   `cc_t', `speed_t', and all the macros specifying the flag bits.  */
    39	#include <bits/termios.h>
    40	
    41	#ifdef __USE_MISC
    42	/* Compare a character C to a value VAL from the `c_cc' array in a
    43	   `struct termios'.  If VAL is _POSIX_VDISABLE, no character can match it.  */
    44	# define CCEQ(val, c)	((c) == (val) && (val) != _POSIX_VDISABLE)
    45	#endif
    46	
    47	/* Return the output baud rate stored in *TERMIOS_P.  */
    48	extern speed_t cfgetospeed (const struct termios *__termios_p) __THROW;
    49	
    50	/* Return the input baud rate stored in *TERMIOS_P.  */
    51	extern speed_t cfgetispeed (const struct termios *__termios_p) __THROW;
    52	
    53	/* Set the output baud rate stored in *TERMIOS_P to SPEED.  */
    54	extern int cfsetospeed (struct termios *__termios_p, speed_t __speed) __THROW;
    55	
    56	/* Set the input baud rate stored in *TERMIOS_P to SPEED.  */
    57	extern int cfsetispeed (struct termios *__termios_p, speed_t __speed) __THROW;
    58	
    59	#ifdef	__USE_MISC
    60	/* Set both the input and output baud rates in *TERMIOS_OP to SPEED.  */
    61	extern int cfsetspeed (struct termios *__termios_p, speed_t __speed) __THROW;
    62	#endif
    63	
    64	#ifdef __USE_GNU
    65	/* Interfaces that are explicitly numeric representations of baud rates */
    66	typedef speed_t baud_t;
    67	#define BAUD_MAX SPEED_MAX
    68	
    69	/* Return the output baud rate stored in *TERMIOS_P.  */
    70	extern baud_t cfgetobaud (const struct termios *__termios_p) __THROW;
    71	
    72	/* Return the input baud rate stored in *TERMIOS_P.  */
    73	extern baud_t cfgetibaud (const struct termios *__termios_p) __THROW;
    74	
    75	/* Set the output baud rate stored in *TERMIOS_P to BAUD.  */
    76	extern int cfsetobaud (struct termios *__termios_p, baud_t __baud) __THROW;
    77	
    78	/* Set the input baud rate stored in *TERMIOS_P to BAUD.  */
    79	extern int cfsetibaud (struct termios *__termios_p, baud_t __baud) __THROW;
    80	
    81	/* Set both the input and output baud rates in *TERMIOS_OP to BAUD.  */
    82	extern int cfsetbaud (struct termios *__termios_p, baud_t __baud) __THROW;
    83	#endif
    84	
    85	/* Put the state of FD into *TERMIOS_P.  */
    86	extern int tcgetattr (int __fd, struct termios *__termios_p) __THROW;
    87	
    88	/* Set the state of FD to *TERMIOS_P.
    89	   Values for OPTIONAL_ACTIONS (TCSA*) are in <bits/termios.h>.  */
    90	extern int tcsetattr (int __fd, int __optional_actions,
    91			      const struct termios *__termios_p) __THROW;
    92	
    93	
    94	#ifdef	__USE_MISC
    95	/* Set *TERMIOS_P to indicate raw mode.  */
    96	extern void cfmakeraw (struct termios *__termios_p) __THROW;
    97	#endif
    98	
    99	/* Send zero bits on FD.  */
   100	extern int tcsendbreak (int __fd, int __duration) __THROW;
   101	
   102	/* Wait for pending output to be written on FD.
   103	
   104	   This function is a cancellation point and therefore not marked with
   105	   __THROW.  */
   106	extern int tcdrain (int __fd);
   107	
   108	/* Flush pending data on FD.
   109	   Values for QUEUE_SELECTOR (TC{I,O,IO}FLUSH) are in <bits/termios.h>.  */
   110	extern int tcflush (int __fd, int __queue_selector) __THROW;
   111	
   112	/* Suspend or restart transmission on FD.
   113	   Values for ACTION (TC[IO]{OFF,ON}) are in <bits/termios.h>.  */
   114	extern int tcflow (int __fd, int __action) __THROW;
   115	
   116	
   117	#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
   118	/* Get process group ID for session leader for controlling terminal FD.  */
   119	extern __pid_t tcgetsid (int __fd) __THROW;
   120	#endif
   121	
   122	
   123	#ifdef __USE_MISC
   124	# include <sys/ttydefaults.h>
   125	#endif
   126	
   127	__END_DECLS
   128	
   129	#endif /* termios.h  */