usr/src/sys/h/tty.h

/*      tty.h   4.1     11/9/80 */

#include <sgtty.h>
#include <sys/ioctl.h>

/*
 * A clist structure is the head
 * of a linked list queue of characters.
 * The characters are stored in
 * blocks containing a link and CBSIZE (param.h)
 * characters.  The routines getc, putc, ... in prim.c
 * manipulate these structures.
 */
struct clist
{
        int     c_cc;           /* character count */
        char    *c_cf;          /* pointer to first char */
        char    *c_cl;          /* pointer to last char */
};

/*
 * A tty structure is needed for
 * each UNIX character device that
 * is used for normal terminal IO.
 * The routines in tty.c handle the
 * common code associated with
 * these structures.  The definition
 * and device dependent code is in
 * each driver. (cons.c, dh.c, dz.c, kl.c)
 */
struct tty
{
        union {
                struct {
                        struct  clist T_rawq;
                        struct  clist T_canq;
                } t_t;
#define t_rawq  t_nu.t_t.T_rawq         /* raw characters or partial line */
#define t_canq  t_nu.t_t.T_canq         /* complete input lines */
                struct {
                        struct  buf *T_bufp;
                        char    *T_cp;
                        int     T_inbuf;
                        int     T_rec;
                } t_n;
#define t_bufp  t_nu.t_n.T_bufp         /* buffer allocated to protocol */
#define t_cp    t_nu.t_n.T_cp           /* pointer into the ripped off buffer */
#define t_inbuf t_nu.t_n.T_inbuf        /* number chars in the buffer */
#define t_rec   t_nu.t_n.T_rec          /* have a complete record */
        } t_nu;
        struct  clist t_outq;   /* output list to device */
        int     (*t_oproc)();   /* routine to start output */
        int     (*t_iproc)();   /* routine to start input */
        struct chan *t_chan;    /* destination channel */
        caddr_t t_linep;        /* aux line discipline pointer */
        caddr_t t_addr;         /* device address */
        dev_t   t_dev;          /* device number */
        short   t_flags;        /* mode, settable by ioctl call */
        short   t_state;        /* internal state, not visible externally */
        short   t_pgrp;         /* process group name */
        char    t_delct;        /* number of delimiters in raw q */
        char    t_line;         /* line discipline */
        char    t_col;          /* printing column of device */
        char    t_erase;        /* erase character */
        char    t_kill;         /* kill character */
        char    t_char;         /* character temporary */
        char    t_ispeed;       /* input speed */
        char    t_ospeed;       /* output speed */
/* begin local */
        char    t_rocount;      /* chars input since a ttwrite() */
        char    t_rocol;        /* t_col when first input this line */
        struct  ltchars t_lchr; /* local special characters */
        short   t_local;        /* local mode word */
        short   t_lstate;       /* local state bits */
/* end local */
        union {
                struct tchars t_chr;
                struct clist t_ctlq;
        } t_un;
};

#define tun     tp->t_un.t_chr
#define tlun    tp->t_lchr

#define TTIPRI  28
#define TTOPRI  29

#define CTRL(c) ('c'&037)

/* default special characters */
#define CERASE  '#'
#define CEOT    CTRL(d)
#define CKILL   '@'
#define CQUIT   034             /* FS, cntl shift L */
#define CINTR   0177            /* DEL */
#define CSTOP   CTRL(s)
#define CSTART  CTRL(q)
#define CBRK    0377

/* limits */
#define NSPEEDS 16
#define TTMASK  15
#ifdef KERNEL
short   tthiwat[NSPEEDS], ttlowat[NSPEEDS];
#define TTHIWAT(tp)     tthiwat[(tp)->t_ospeed&TTMASK]
#define TTLOWAT(tp)     ttlowat[(tp)->t_ospeed&TTMASK]
#endif
#define TTYHOG  256

/* hardware bits */
#define DONE    0200
#define IENABLE 0100

/* internal state bits */
#define TIMEOUT 01              /* delay timeout in progress */
#define WOPEN   02              /* waiting for open to complete */
#define ISOPEN  04              /* device is open */
#define FLUSH   010             /* outq has been flushed during DMA */
#define CARR_ON 020             /* software copy of carrier-present */
#define BUSY    040             /* output in progress */
#define ASLEEP  0100            /* wakeup when output done */
#define XCLUDE  0200            /* exclusive-use flag against open */
#define TTSTOP  0400            /* output stopped by ctl-s */
#define HUPCLS  01000           /* hang up upon last close */
#define TBLOCK  02000           /* tandem queue blocked */
#define SPEEDS  04000           /* t_ispeed and t_ospeed used by driver */
#define PROTO1  010000          /* reserved for line discipline */
#define EXTPROC 020000          /* external processor (kmc) */
#define FSLEEP  040000          /* Wakeup on input framing */
#define CNTLQ   0100000         /* interpret t_un as clist */

/* define partab character types */
#define ORDINARY        0
#define CONTROL         1
#define BACKSPACE       2
#define NEWLINE         3
#define TAB             4
#define VTAB            5
#define RETURN          6

/* define dmctl actions */
#define DMSET           0
#define DMBIS           1
#define DMBIC           2