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26df6d1340
This patch is against the 2.6.34 source.
Paraphrased from the 1989 BSD patch by David Borman @ cray.com:
These are the changes needed for the kernel to support
LINEMODE in the server.
There is a new bit in the termios local flag word, EXTPROC.
When this bit is set, several aspects of the terminal driver
are disabled. Input line editing, character echo, and mapping
of signals are all disabled. This allows the telnetd to turn
off these functions when in linemode, but still keep track of
what state the user wants the terminal to be in.
New ioctl:
TIOCSIG Generate a signal to processes in the
current process group of the pty.
There is a new mode for packet driver, the TIOCPKT_IOCTL bit.
When packet mode is turned on in the pty, and the EXTPROC bit
is set, then whenever the state of the pty is changed, the
next read on the master side of the pty will have the TIOCPKT_IOCTL
bit set. This allows the process on the server side of the pty
to know when the state of the terminal has changed; it can then
issue the appropriate ioctl to retrieve the new state.
Since the original BSD patches accompanied the source code for telnet
I've left that reference here, but obviously the feature is useful for
any remote terminal protocol, including ssh.
The corresponding feature has existed in the BSD tty driver since 1989.
For historical reference, a good copy of the relevant files can be found
here:
http://anonsvn.mit.edu/viewvc/krb5/trunk/src/appl/telnet/?pathrev=17741
Signed-off-by: Howard Chu <hyc@symas.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
228 lines
7.7 KiB
C
228 lines
7.7 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 96, 99, 2001, 06 Ralf Baechle
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* Copyright (C) 1999 Silicon Graphics, Inc.
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* Copyright (C) 2001 MIPS Technologies, Inc.
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*/
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#ifndef _ASM_TERMBITS_H
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#define _ASM_TERMBITS_H
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#include <linux/posix_types.h>
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typedef unsigned char cc_t;
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typedef unsigned int speed_t;
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typedef unsigned int tcflag_t;
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/*
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* The ABI says nothing about NCC but seems to use NCCS as
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* replacement for it in struct termio
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*/
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#define NCCS 23
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struct termios {
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tcflag_t c_iflag; /* input mode flags */
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tcflag_t c_oflag; /* output mode flags */
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tcflag_t c_cflag; /* control mode flags */
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tcflag_t c_lflag; /* local mode flags */
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cc_t c_line; /* line discipline */
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cc_t c_cc[NCCS]; /* control characters */
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};
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struct termios2 {
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tcflag_t c_iflag; /* input mode flags */
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tcflag_t c_oflag; /* output mode flags */
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tcflag_t c_cflag; /* control mode flags */
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tcflag_t c_lflag; /* local mode flags */
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cc_t c_line; /* line discipline */
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cc_t c_cc[NCCS]; /* control characters */
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speed_t c_ispeed; /* input speed */
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speed_t c_ospeed; /* output speed */
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};
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struct ktermios {
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tcflag_t c_iflag; /* input mode flags */
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tcflag_t c_oflag; /* output mode flags */
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tcflag_t c_cflag; /* control mode flags */
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tcflag_t c_lflag; /* local mode flags */
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cc_t c_line; /* line discipline */
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cc_t c_cc[NCCS]; /* control characters */
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speed_t c_ispeed; /* input speed */
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speed_t c_ospeed; /* output speed */
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};
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/* c_cc characters */
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#define VINTR 0 /* Interrupt character [ISIG]. */
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#define VQUIT 1 /* Quit character [ISIG]. */
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#define VERASE 2 /* Erase character [ICANON]. */
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#define VKILL 3 /* Kill-line character [ICANON]. */
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#define VMIN 4 /* Minimum number of bytes read at once [!ICANON]. */
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#define VTIME 5 /* Time-out value (tenths of a second) [!ICANON]. */
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#define VEOL2 6 /* Second EOL character [ICANON]. */
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#define VSWTC 7 /* ??? */
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#define VSWTCH VSWTC
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#define VSTART 8 /* Start (X-ON) character [IXON, IXOFF]. */
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#define VSTOP 9 /* Stop (X-OFF) character [IXON, IXOFF]. */
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#define VSUSP 10 /* Suspend character [ISIG]. */
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#if 0
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/*
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* VDSUSP is not supported
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*/
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#define VDSUSP 11 /* Delayed suspend character [ISIG]. */
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#endif
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#define VREPRINT 12 /* Reprint-line character [ICANON]. */
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#define VDISCARD 13 /* Discard character [IEXTEN]. */
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#define VWERASE 14 /* Word-erase character [ICANON]. */
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#define VLNEXT 15 /* Literal-next character [IEXTEN]. */
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#define VEOF 16 /* End-of-file character [ICANON]. */
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#define VEOL 17 /* End-of-line character [ICANON]. */
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/* c_iflag bits */
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#define IGNBRK 0000001 /* Ignore break condition. */
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#define BRKINT 0000002 /* Signal interrupt on break. */
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#define IGNPAR 0000004 /* Ignore characters with parity errors. */
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#define PARMRK 0000010 /* Mark parity and framing errors. */
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#define INPCK 0000020 /* Enable input parity check. */
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#define ISTRIP 0000040 /* Strip 8th bit off characters. */
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#define INLCR 0000100 /* Map NL to CR on input. */
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#define IGNCR 0000200 /* Ignore CR. */
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#define ICRNL 0000400 /* Map CR to NL on input. */
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#define IUCLC 0001000 /* Map upper case to lower case on input. */
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#define IXON 0002000 /* Enable start/stop output control. */
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#define IXANY 0004000 /* Any character will restart after stop. */
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#define IXOFF 0010000 /* Enable start/stop input control. */
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#define IMAXBEL 0020000 /* Ring bell when input queue is full. */
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#define IUTF8 0040000 /* Input is UTF-8 */
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/* c_oflag bits */
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#define OPOST 0000001 /* Perform output processing. */
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#define OLCUC 0000002 /* Map lower case to upper case on output. */
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#define ONLCR 0000004 /* Map NL to CR-NL on output. */
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#define OCRNL 0000010
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#define ONOCR 0000020
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#define ONLRET 0000040
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#define OFILL 0000100
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#define OFDEL 0000200
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#define NLDLY 0000400
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#define NL0 0000000
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#define NL1 0000400
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#define CRDLY 0003000
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#define CR0 0000000
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#define CR1 0001000
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#define CR2 0002000
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#define CR3 0003000
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#define TABDLY 0014000
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#define TAB0 0000000
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#define TAB1 0004000
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#define TAB2 0010000
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#define TAB3 0014000
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#define XTABS 0014000
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#define BSDLY 0020000
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#define BS0 0000000
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#define BS1 0020000
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#define VTDLY 0040000
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#define VT0 0000000
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#define VT1 0040000
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#define FFDLY 0100000
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#define FF0 0000000
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#define FF1 0100000
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/*
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#define PAGEOUT ???
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#define WRAP ???
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*/
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/* c_cflag bit meaning */
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#define CBAUD 0010017
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#define B0 0000000 /* hang up */
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#define B50 0000001
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#define B75 0000002
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#define B110 0000003
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#define B134 0000004
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#define B150 0000005
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#define B200 0000006
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#define B300 0000007
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#define B600 0000010
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#define B1200 0000011
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#define B1800 0000012
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#define B2400 0000013
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#define B4800 0000014
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#define B9600 0000015
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#define B19200 0000016
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#define B38400 0000017
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#define EXTA B19200
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#define EXTB B38400
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#define CSIZE 0000060 /* Number of bits per byte (mask). */
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#define CS5 0000000 /* 5 bits per byte. */
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#define CS6 0000020 /* 6 bits per byte. */
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#define CS7 0000040 /* 7 bits per byte. */
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#define CS8 0000060 /* 8 bits per byte. */
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#define CSTOPB 0000100 /* Two stop bits instead of one. */
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#define CREAD 0000200 /* Enable receiver. */
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#define PARENB 0000400 /* Parity enable. */
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#define PARODD 0001000 /* Odd parity instead of even. */
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#define HUPCL 0002000 /* Hang up on last close. */
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#define CLOCAL 0004000 /* Ignore modem status lines. */
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#define CBAUDEX 0010000
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#define BOTHER 0010000
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#define B57600 0010001
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#define B115200 0010002
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#define B230400 0010003
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#define B460800 0010004
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#define B500000 0010005
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#define B576000 0010006
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#define B921600 0010007
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#define B1000000 0010010
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#define B1152000 0010011
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#define B1500000 0010012
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#define B2000000 0010013
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#define B2500000 0010014
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#define B3000000 0010015
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#define B3500000 0010016
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#define B4000000 0010017
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#define CIBAUD 002003600000 /* input baud rate */
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#define CMSPAR 010000000000 /* mark or space (stick) parity */
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#define CRTSCTS 020000000000 /* flow control */
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#define IBSHIFT 16 /* Shift from CBAUD to CIBAUD */
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/* c_lflag bits */
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#define ISIG 0000001 /* Enable signals. */
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#define ICANON 0000002 /* Do erase and kill processing. */
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#define XCASE 0000004
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#define ECHO 0000010 /* Enable echo. */
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#define ECHOE 0000020 /* Visual erase for ERASE. */
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#define ECHOK 0000040 /* Echo NL after KILL. */
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#define ECHONL 0000100 /* Echo NL even if ECHO is off. */
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#define NOFLSH 0000200 /* Disable flush after interrupt. */
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#define IEXTEN 0000400 /* Enable DISCARD and LNEXT. */
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#define ECHOCTL 0001000 /* Echo control characters as ^X. */
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#define ECHOPRT 0002000 /* Hardcopy visual erase. */
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#define ECHOKE 0004000 /* Visual erase for KILL. */
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#define FLUSHO 0020000
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#define PENDIN 0040000 /* Retype pending input (state). */
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#define TOSTOP 0100000 /* Send SIGTTOU for background output. */
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#define ITOSTOP TOSTOP
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#define EXTPROC 0200000 /* External processing on pty */
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/* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
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#define TIOCSER_TEMT 0x01 /* Transmitter physically empty */
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/* tcflow() and TCXONC use these */
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#define TCOOFF 0 /* Suspend output. */
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#define TCOON 1 /* Restart suspended output. */
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#define TCIOFF 2 /* Send a STOP character. */
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#define TCION 3 /* Send a START character. */
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/* tcflush() and TCFLSH use these */
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#define TCIFLUSH 0 /* Discard data received but not yet read. */
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#define TCOFLUSH 1 /* Discard data written but not yet sent. */
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#define TCIOFLUSH 2 /* Discard all pending data. */
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/* tcsetattr uses these */
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#define TCSANOW TCSETS /* Change immediately. */
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#define TCSADRAIN TCSETSW /* Change when pending output is written. */
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#define TCSAFLUSH TCSETSF /* Flush pending input before changing. */
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#endif /* _ASM_TERMBITS_H */
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