FM / bits

/usr/include/bits

Name	Size	Mode	Actions
types/	-	0755	rm
a.out.h	268	0644	edit dl rm
byteswap.h	2449	0644	edit dl rm
cmathcalls.h	4138	0644	edit dl rm
confname.h	23708	0644	edit dl rm
cpu-set.h	4515	0644	edit dl rm
dirent.h	1770	0644	edit dl rm
dlfcn.h	2520	0644	edit dl rm
elfclass.h	426	0644	edit dl rm
endian.h	176	0644	edit dl rm
environments.h	3790	0644	edit dl rm
epoll.h	1070	0644	edit dl rm
errno.h	1425	0644	edit dl rm
error.h	2683	0644	edit dl rm
eventfd.h	1128	0644	edit dl rm
fcntl-linux.h	13712	0644	edit dl rm
fcntl.h	2245	0644	edit dl rm
fcntl2.h	5574	0644	edit dl rm
fenv.h	4605	0644	edit dl rm
fenvinline.h	190	0644	edit dl rm
floatn-common.h	9764	0644	edit dl rm
floatn.h	4372	0644	edit dl rm
flt-eval-method.h	1214	0644	edit dl rm
fp-fast.h	1215	0644	edit dl rm
fp-logb.h	1011	0644	edit dl rm
getopt_core.h	3666	0644	edit dl rm
getopt_ext.h	3037	0644	edit dl rm
getopt_posix.h	1809	0644	edit dl rm
hwcap.h	971	0644	edit dl rm
in.h	9466	0644	edit dl rm
indirect-return.h	1585	0644	edit dl rm
initspin.h	25	0644	edit dl rm
inotify.h	1079	0644	edit dl rm
ioctl-types.h	2455	0644	edit dl rm
ioctls.h	4477	0644	edit dl rm
ipc.h	2070	0644	edit dl rm
ipctypes.h	1175	0644	edit dl rm
iscanonical.h	2478	0644	edit dl rm
libc-header-start.h	2607	0644	edit dl rm
libm-simd-decl-stubs.h	3003	0644	edit dl rm
link.h	4285	0644	edit dl rm
link_lavcurrent.h	1099	0644	edit dl rm
locale.h	1367	0644	edit dl rm
local_lim.h	3184	0644	edit dl rm
long-double.h	923	0644	edit dl rm
math-finite.h	5374	0644	edit dl rm
math-vector.h	2307	0644	edit dl rm
mathcalls-helper-functions.h	1764	0644	edit dl rm
mathcalls-narrow.h	1306	0644	edit dl rm
mathcalls.h	13100	0644	edit dl rm
mathdef.h	890	0644	edit dl rm
mathinline.h	13015	0644	edit dl rm
mman-linux.h	4895	0644	edit dl rm
mman-shared.h	2736	0644	edit dl rm
mman.h	2063	0644	edit dl rm
monetary-ldbl.h	1046	0644	edit dl rm
mqueue.h	1245	0644	edit dl rm
mqueue2.h	2150	0644	edit dl rm
msq.h	2637	0644	edit dl rm
netdb.h	1263	0644	edit dl rm
param.h	1432	0644	edit dl rm
poll.h	2075	0644	edit dl rm
poll2.h	2485	0644	edit dl rm
posix1_lim.h	5188	0644	edit dl rm
posix2_lim.h	2866	0644	edit dl rm
posix_opt.h	5766	0644	edit dl rm
printf-ldbl.h	991	0644	edit dl rm
pthreadtypes-arch.h	3290	0644	edit dl rm
pthreadtypes.h	3071	0644	edit dl rm
ptrace-shared.h	2900	0644	edit dl rm
resource.h	6298	0644	edit dl rm
sched.h	3747	0644	edit dl rm
select.h	2105	0644	edit dl rm
select2.h	1437	0644	edit dl rm
sem.h	2619	0644	edit dl rm
semaphore.h	1237	0644	edit dl rm
setjmp.h	1286	0644	edit dl rm
setjmp2.h	1704	0644	edit dl rm
shm.h	3591	0644	edit dl rm
sigaction.h	2934	0644	edit dl rm
sigcontext.h	4264	0644	edit dl rm
sigevent-consts.h	1470	0644	edit dl rm
siginfo-arch.h	729	0644	edit dl rm
siginfo-consts-arch.h	204	0644	edit dl rm
siginfo-consts.h	5973	0644	edit dl rm
signalfd.h	1066	0644	edit dl rm
signum-generic.h	4340	0644	edit dl rm
signum.h	1633	0644	edit dl rm
sigstack.h	1167	0644	edit dl rm
sigthread.h	1691	0644	edit dl rm
sockaddr.h	1513	0644	edit dl rm
socket.h	15562	0644	edit dl rm
socket2.h	3036	0644	edit dl rm
socket_type.h	2215	0644	edit dl rm
ss_flags.h	1187	0644	edit dl rm
stab.def	9039	0644	edit dl rm
stat.h	7619	0644	edit dl rm
statfs.h	1916	0644	edit dl rm
statvfs.h	3422	0644	edit dl rm
statx-generic.h	2049	0644	edit dl rm
statx.h	1399	0644	edit dl rm
stdint-intn.h	1036	0644	edit dl rm
stdint-uintn.h	1048	0644	edit dl rm
stdio-ldbl.h	3013	0644	edit dl rm
stdio.h	5586	0644	edit dl rm
stdio2.h	12546	0644	edit dl rm
stdio_lim.h	1212	0644	edit dl rm
stdlib-bsearch.h	1377	0644	edit dl rm
stdlib-float.h	1114	0644	edit dl rm
stdlib-ldbl.h	1372	0644	edit dl rm
stdlib.h	5069	0644	edit dl rm
strings_fortified.h	1239	0644	edit dl rm
string_fortified.h	4683	0644	edit dl rm
syscall.h	45663	0644	edit dl rm
sysctl.h	898	0644	edit dl rm
syslog-ldbl.h	1205	0644	edit dl rm
syslog-path.h	1060	0644	edit dl rm
syslog.h	1684	0644	edit dl rm
sysmacros.h	2952	0644	edit dl rm
sys_errlist.h	1215	0644	edit dl rm
termios.h	5363	0644	edit dl rm
thread-shared-types.h	6735	0644	edit dl rm
time.h	2998	0644	edit dl rm
timerfd.h	1102	0644	edit dl rm
timex.h	4595	0644	edit dl rm
types.h	8335	0644	edit dl rm
typesizes.h	3397	0644	edit dl rm
uintn-identity.h	1541	0644	edit dl rm
uio-ext.h	1922	0644	edit dl rm
uio_lim.h	1384	0644	edit dl rm
unistd.h	10812	0644	edit dl rm
utmp.h	4066	0644	edit dl rm
utmpx.h	3577	0644	edit dl rm
utsname.h	1212	0644	edit dl rm
waitflags.h	1696	0644	edit dl rm
waitstatus.h	2286	0644	edit dl rm
wchar-ldbl.h	2423	0644	edit dl rm
wchar.h	1905	0644	edit dl rm
wchar2.h	18221	0644	edit dl rm
wctype-wchar.h	6301	0644	edit dl rm
wordsize.h	442	0644	edit dl rm
xopen_lim.h	3857	0644	edit dl rm

Edit: /usr/include/bits/termios.h (5363B)

/* termios type and macro definitions.  Linux version.
   Copyright (C) 1993-2018 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 _TERMIOS_H
# error "Never include <bits/termios.h> directly; use <termios.h> instead."
#endif

typedef unsigned char	cc_t;
typedef unsigned int	speed_t;
typedef unsigned int	tcflag_t;

#define NCCS 32
struct termios
  {
    tcflag_t c_iflag;		/* input mode flags */
    tcflag_t c_oflag;		/* output mode flags */
    tcflag_t c_cflag;		/* control mode flags */
    tcflag_t c_lflag;		/* local mode flags */
    cc_t c_line;			/* line discipline */
    cc_t c_cc[NCCS];		/* control characters */
    speed_t c_ispeed;		/* input speed */
    speed_t c_ospeed;		/* output speed */
#define _HAVE_STRUCT_TERMIOS_C_ISPEED 1
#define _HAVE_STRUCT_TERMIOS_C_OSPEED 1
  };

/* c_cc characters */
#define VINTR 0
#define VQUIT 1
#define VERASE 2
#define VKILL 3
#define VEOF 4
#define VTIME 5
#define VMIN 6
#define VSWTC 7
#define VSTART 8
#define VSTOP 9
#define VSUSP 10
#define VEOL 11
#define VREPRINT 12
#define VDISCARD 13
#define VWERASE 14
#define VLNEXT 15
#define VEOL2 16

/* c_iflag bits */
#define IGNBRK	0000001
#define BRKINT	0000002
#define IGNPAR	0000004
#define PARMRK	0000010
#define INPCK	0000020
#define ISTRIP	0000040
#define INLCR	0000100
#define IGNCR	0000200
#define ICRNL	0000400
#define IUCLC	0001000
#define IXON	0002000
#define IXANY	0004000
#define IXOFF	0010000
#define IMAXBEL	0020000
#define IUTF8	0040000

/* c_oflag bits */
#define OPOST	0000001
#define OLCUC	0000002
#define ONLCR	0000004
#define OCRNL	0000010
#define ONOCR	0000020
#define ONLRET	0000040
#define OFILL	0000100
#define OFDEL	0000200
#if defined __USE_MISC || defined __USE_XOPEN
# define NLDLY	0000400
# define   NL0	0000000
# define   NL1	0000400
# define CRDLY	0003000
# define   CR0	0000000
# define   CR1	0001000
# define   CR2	0002000
# define   CR3	0003000
# define TABDLY	0014000
# define   TAB0	0000000
# define   TAB1	0004000
# define   TAB2	0010000
# define   TAB3	0014000
# define BSDLY	0020000
# define   BS0	0000000
# define   BS1	0020000
# define FFDLY	0100000
# define   FF0	0000000
# define   FF1	0100000
#endif

#define VTDLY	0040000
#define   VT0	0000000
#define   VT1	0040000

#ifdef __USE_MISC
# define XTABS	0014000
#endif

/* c_cflag bit meaning */
#ifdef __USE_MISC
# define CBAUD	0010017
#endif
#define  B0	0000000		/* hang up */
#define  B50	0000001
#define  B75	0000002
#define  B110	0000003
#define  B134	0000004
#define  B150	0000005
#define  B200	0000006
#define  B300	0000007
#define  B600	0000010
#define  B1200	0000011
#define  B1800	0000012
#define  B2400	0000013
#define  B4800	0000014
#define  B9600	0000015
#define  B19200	0000016
#define  B38400	0000017
#ifdef __USE_MISC
# define EXTA B19200
# define EXTB B38400
#endif
#define CSIZE	0000060
#define   CS5	0000000
#define   CS6	0000020
#define   CS7	0000040
#define   CS8	0000060
#define CSTOPB	0000100
#define CREAD	0000200
#define PARENB	0000400
#define PARODD	0001000
#define HUPCL	0002000
#define CLOCAL	0004000
#ifdef __USE_MISC
# define CBAUDEX 0010000
#endif
#define  B57600   0010001
#define  B115200  0010002
#define  B230400  0010003
#define  B460800  0010004
#define  B500000  0010005
#define  B576000  0010006
#define  B921600  0010007
#define  B1000000 0010010
#define  B1152000 0010011
#define  B1500000 0010012
#define  B2000000 0010013
#define  B2500000 0010014
#define  B3000000 0010015
#define  B3500000 0010016
#define  B4000000 0010017
#define __MAX_BAUD B4000000
#ifdef __USE_MISC
# define CIBAUD	  002003600000		/* input baud rate (not used) */
# define CMSPAR   010000000000		/* mark or space (stick) parity */
# define CRTSCTS  020000000000		/* flow control */
#endif

/* c_lflag bits */
#define ISIG	0000001
#define ICANON	0000002
#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
# define XCASE	0000004
#endif
#define ECHO	0000010
#define ECHOE	0000020
#define ECHOK	0000040
#define ECHONL	0000100
#define NOFLSH	0000200
#define TOSTOP	0000400
#ifdef __USE_MISC
# define ECHOCTL 0001000
# define ECHOPRT 0002000
# define ECHOKE	 0004000
# define FLUSHO	 0010000
# define PENDIN	 0040000
#endif
#define IEXTEN	0100000
#ifdef __USE_MISC
# define EXTPROC 0200000
#endif

/* tcflow() and TCXONC use these */
#define	TCOOFF		0
#define	TCOON		1
#define	TCIOFF		2
#define	TCION		3

/* tcflush() and TCFLSH use these */
#define	TCIFLUSH	0
#define	TCOFLUSH	1
#define	TCIOFLUSH	2

/* tcsetattr uses these */
#define	TCSANOW		0
#define	TCSADRAIN	1
#define	TCSAFLUSH	2

#define _IOT_termios /* Hurd ioctl type field.  */ \
  _IOT (_IOTS (cflag_t), 4, _IOTS (cc_t), NCCS, _IOTS (speed_t), 2)

cmd: