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freebsd-nq/sys/sys/termios.h
Ed Schouten bc093719ca Integrate the new MPSAFE TTY layer to the FreeBSD operating system. 
The last half year I've been working on a replacement TTY layer for the
FreeBSD kernel. The new TTY layer was designed to improve the following:

- Improved driver model:

  The old TTY layer has a driver model that is not abstract enough to
  make it friendly to use. A good example is the output path, where the
  device drivers directly access the output buffers. This means that an
  in-kernel PPP implementation must always convert network buffers into
  TTY buffers.

  If a PPP implementation would be built on top of the new TTY layer
  (still needs a hooks layer, though), it would allow the PPP
  implementation to directly hand the data to the TTY driver.

- Improved hotplugging:

  With the old TTY layer, it isn't entirely safe to destroy TTY's from
  the system. This implementation has a two-step destructing design,
  where the driver first abandons the TTY. After all threads have left
  the TTY, the TTY layer calls a routine in the driver, which can be
  used to free resources (unit numbers, etc).

  The pts(4) driver also implements this feature, which means
  posix_openpt() will now return PTY's that are created on the fly.

- Improved performance:

  One of the major improvements is the per-TTY mutex, which is expected
  to improve scalability when compared to the old Giant locking.
  Another change is the unbuffered copying to userspace, which is both
  used on TTY device nodes and PTY masters.

Upgrading should be quite straightforward. Unlike previous versions,
existing kernel configuration files do not need to be changed, except
when they reference device drivers that are listed in UPDATING.

Obtained from:		//depot/projects/mpsafetty/...
Approved by:		philip (ex-mentor)
Discussed:		on the lists, at BSDCan, at the DevSummit
Sponsored by:		Snow B.V., the Netherlands
dcons(4) fixed by:	kan
2008-08-20 08:31:58 +00:00

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/*-
* Copyright (c) 1988, 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)termios.h 8.3 (Berkeley) 3/28/94
* $FreeBSD$
*/
#ifndef _SYS_TERMIOS_H_
#define _SYS_TERMIOS_H_
#include <sys/_types.h>
#ifndef _PID_T_DECLARED
typedef __pid_t pid_t;
#define _PID_T_DECLARED
#endif
/*
* Special Control Characters
*
* Index into c_cc[] character array.
*
* Name Subscript Enabled by
*/
#define VEOF 0 /* ICANON */
#define VEOL 1 /* ICANON */
#ifndef _POSIX_SOURCE
#define VEOL2 2 /* ICANON together with IEXTEN */
#endif
#define VERASE 3 /* ICANON */
#ifndef _POSIX_SOURCE
#define VWERASE 4 /* ICANON together with IEXTEN */
#endif
#define VKILL 5 /* ICANON */
#ifndef _POSIX_SOURCE
#define VREPRINT 6 /* ICANON together with IEXTEN */
#define VERASE2 7 /* ICANON */
#endif
/* 7 ex-spare 1 */
#define VINTR 8 /* ISIG */
#define VQUIT 9 /* ISIG */
#define VSUSP 10 /* ISIG */
#ifndef _POSIX_SOURCE
#define VDSUSP 11 /* ISIG together with IEXTEN */
#endif
#define VSTART 12 /* IXON, IXOFF */
#define VSTOP 13 /* IXON, IXOFF */
#ifndef _POSIX_SOURCE
#define VLNEXT 14 /* IEXTEN */
#define VDISCARD 15 /* IEXTEN */
#endif
#define VMIN 16 /* !ICANON */
#define VTIME 17 /* !ICANON */
#ifndef _POSIX_SOURCE
#define VSTATUS 18 /* ICANON together with IEXTEN */
/* 19 spare 2 */
#endif
#define NCCS 20
#define _POSIX_VDISABLE 0xff
/*
* Input flags - software input processing
*/
#define IGNBRK 0x00000001 /* ignore BREAK condition */
#define BRKINT 0x00000002 /* map BREAK to SIGINTR */
#define IGNPAR 0x00000004 /* ignore (discard) parity errors */
#define PARMRK 0x00000008 /* mark parity and framing errors */
#define INPCK 0x00000010 /* enable checking of parity errors */
#define ISTRIP 0x00000020 /* strip 8th bit off chars */
#define INLCR 0x00000040 /* map NL into CR */
#define IGNCR 0x00000080 /* ignore CR */
#define ICRNL 0x00000100 /* map CR to NL (ala CRMOD) */
#define IXON 0x00000200 /* enable output flow control */
#define IXOFF 0x00000400 /* enable input flow control */
#ifndef _POSIX_SOURCE
#define IXANY 0x00000800 /* any char will restart after stop */
#define IMAXBEL 0x00002000 /* ring bell on input queue full */
#endif /*_POSIX_SOURCE */
/*
* Output flags - software output processing
*/
#define OPOST 0x00000001 /* enable following output processing */
#ifndef _POSIX_SOURCE
#define ONLCR 0x00000002 /* map NL to CR-NL (ala CRMOD) */
#define TABDLY 0x00000004 /* tab delay mask */
#define TAB0 0x00000000 /* no tab delay and expansion */
#define TAB3 0x00000004 /* expand tabs to spaces */
#ifndef _KERNEL
#define OXTABS TAB3
#endif /* !_KERNEL */
#define ONOEOT 0x00000008 /* discard EOT's (^D) on output) */
#define OCRNL 0x00000010 /* map CR to NL on output */
#define ONOCR 0x00000020 /* no CR output at column 0 */
#define ONLRET 0x00000040 /* NL performs CR function */
#endif /*_POSIX_SOURCE */
/*
* Control flags - hardware control of terminal
*/
#ifndef _POSIX_SOURCE
#define CIGNORE 0x00000001 /* ignore control flags */
#endif
#define CSIZE 0x00000300 /* character size mask */
#define CS5 0x00000000 /* 5 bits (pseudo) */
#define CS6 0x00000100 /* 6 bits */
#define CS7 0x00000200 /* 7 bits */
#define CS8 0x00000300 /* 8 bits */
#define CSTOPB 0x00000400 /* send 2 stop bits */
#define CREAD 0x00000800 /* enable receiver */
#define PARENB 0x00001000 /* parity enable */
#define PARODD 0x00002000 /* odd parity, else even */
#define HUPCL 0x00004000 /* hang up on last close */
#define CLOCAL 0x00008000 /* ignore modem status lines */
#ifndef _POSIX_SOURCE
#define CCTS_OFLOW 0x00010000 /* CTS flow control of output */
#define CRTSCTS (CCTS_OFLOW | CRTS_IFLOW)
#define CRTS_IFLOW 0x00020000 /* RTS flow control of input */
#define CDTR_IFLOW 0x00040000 /* DTR flow control of input */
#define CDSR_OFLOW 0x00080000 /* DSR flow control of output */
#define CCAR_OFLOW 0x00100000 /* DCD flow control of output */
#ifndef _KERNEL
#define MDMBUF CCAR_OFLOW
#endif /* !_KERNEL */
#endif
/*
* "Local" flags - dumping ground for other state
*
* Warning: some flags in this structure begin with
* the letter "I" and look like they belong in the
* input flag.
*/
#ifndef _POSIX_SOURCE
#define ECHOKE 0x00000001 /* visual erase for line kill */
#endif /*_POSIX_SOURCE */
#define ECHOE 0x00000002 /* visually erase chars */
#define ECHOK 0x00000004 /* echo NL after line kill */
#define ECHO 0x00000008 /* enable echoing */
#define ECHONL 0x00000010 /* echo NL even if ECHO is off */
#ifndef _POSIX_SOURCE
#define ECHOPRT 0x00000020 /* visual erase mode for hardcopy */
#define ECHOCTL 0x00000040 /* echo control chars as ^(Char) */
#endif /*_POSIX_SOURCE */
#define ISIG 0x00000080 /* enable signals INTR, QUIT, [D]SUSP */
#define ICANON 0x00000100 /* canonicalize input lines */
#ifndef _POSIX_SOURCE
#define ALTWERASE 0x00000200 /* use alternate WERASE algorithm */
#endif /*_POSIX_SOURCE */
#define IEXTEN 0x00000400 /* enable DISCARD and LNEXT */
#define EXTPROC 0x00000800 /* external processing */
#define TOSTOP 0x00400000 /* stop background jobs from output */
#ifndef _POSIX_SOURCE
#define FLUSHO 0x00800000 /* output being flushed (state) */
#define NOKERNINFO 0x02000000 /* no kernel output from VSTATUS */
#define PENDIN 0x20000000 /* XXX retype pending input (state) */
#endif /*_POSIX_SOURCE */
#define NOFLSH 0x80000000 /* don't flush after interrupt */
typedef unsigned int tcflag_t;
typedef unsigned char cc_t;
typedef unsigned int speed_t;
struct termios {
tcflag_t c_iflag; /* input flags */
tcflag_t c_oflag; /* output flags */
tcflag_t c_cflag; /* control flags */
tcflag_t c_lflag; /* local flags */
cc_t c_cc[NCCS]; /* control chars */
speed_t c_ispeed; /* input speed */
speed_t c_ospeed; /* output speed */
};
/*
* Standard speeds
*/
#define B0 0
#define B50 50
#define B75 75
#define B110 110
#define B134 134
#define B150 150
#define B200 200
#define B300 300
#define B600 600
#define B1200 1200
#define B1800 1800
#define B2400 2400
#define B4800 4800
#define B9600 9600
#define B19200 19200
#define B38400 38400
#ifndef _POSIX_SOURCE
#define B7200 7200
#define B14400 14400
#define B28800 28800
#define B57600 57600
#define B76800 76800
#define B115200 115200
#define B230400 230400
#define B460800 460800
#define B921600 921600
#define EXTA 19200
#define EXTB 38400
#endif /* !_POSIX_SOURCE */
#ifndef _KERNEL
#ifndef _POSIX_SOURCE
#define CCEQ(val, c) ((c) != _POSIX_VDISABLE && (c) == (val))
#endif
/*
* Commands passed to tcsetattr() for setting the termios structure.
*/
#define TCSANOW 0 /* make change immediate */
#define TCSADRAIN 1 /* drain output, then change */
#define TCSAFLUSH 2 /* drain output, flush input */
#ifndef _POSIX_SOURCE
#define TCSASOFT 0x10 /* flag - don't alter h.w. state */
#endif
#define TCIFLUSH 1
#define TCOFLUSH 2
#define TCIOFLUSH 3
#define TCOOFF 1
#define TCOON 2
#define TCIOFF 3
#define TCION 4
#include <sys/cdefs.h>
__BEGIN_DECLS
speed_t cfgetispeed(const struct termios *);
speed_t cfgetospeed(const struct termios *);
int cfsetispeed(struct termios *, speed_t);
int cfsetospeed(struct termios *, speed_t);
int tcgetattr(int, struct termios *);
int tcsetattr(int, int, const struct termios *);
int tcdrain(int);
int tcflow(int, int);
int tcflush(int, int);
int tcsendbreak(int, int);
#if __POSIX_VISIBLE >= 200112 || __BSD_VISIBLE
pid_t tcgetsid(int);
#endif
#ifndef _POSIX_SOURCE
void cfmakeraw(struct termios *);
int cfsetspeed(struct termios *, speed_t);
#endif /* !_POSIX_SOURCE */
__END_DECLS
#endif /* !_KERNEL */
#ifndef _POSIX_SOURCE
/*
* Include tty ioctl's that aren't just for backwards compatibility
* with the old tty driver. These ioctl definitions were previously
* in <sys/ioctl.h>.
*/
#include <sys/ttycom.h>
#endif
/*
* END OF PROTECTED INCLUDE.
*/
#endif /* !_SYS_TERMIOS_H_ */
#ifndef _POSIX_SOURCE
#include <sys/ttydefaults.h>
#endif
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