[unix-history] / usr / src / sys / sys / tty.h

/*      tty.h   4.11    82/03/15        */

#ifdef KERNEL
#include "../h/ioctl.h"
#else
#include <sys/ioctl.h>
#endif
#include <sgtty.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 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 */
};

/*
* Per-tty structre.
*
* Should be split in two, into device and tty drivers.
* Glue could be masks of what to echo and circular buffer
* (low, high, timeout).
*/
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         /* raw characters or partial line */
               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;           /* device */
       int     (*t_oproc)();           /* device */
       struct  proc *t_rsel;           /* tty */
       struct  proc *t_wsel;
                               caddr_t T_LINEP;        /* ### */
       caddr_t t_addr;                 /* ??? */
       dev_t   t_dev;                  /* device */
       short   t_flags;                /* some of both */
       short   t_state;                /* some of both */
       short   t_pgrp;                 /* tty */
       char    t_delct;                /* tty */
       char    t_line;                 /* glue */
       char    t_col;                  /* tty */
       char    t_erase, t_kill;        /* tty */
       char    t_char;                 /* tty */
       char    t_ispeed, t_ospeed;     /* device */
/* begin local */
       char    t_rocount, t_rocol;     /* tty */
       struct  ltchars t_lchr;         /* tty */
       short   t_local;                /* tty */
       short   t_lstate;               /* tty */
/* end local */
       union {
               struct tchars t_chr;    /* tty */
               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  255

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

/* internal state bits */
#define TS_TIMEOUT      000001          /* delay timeout in progress */
#define TS_WOPEN        000002          /* waiting for open to complete */
#define TS_ISOPEN       000004          /* device is open */
#define TS_FLUSH        000010          /* outq has been flushed during DMA */
#define TS_CARR_ON      000020          /* software copy of carrier-present */
#define TS_BUSY         000040          /* output in progress */
#define TS_ASLEEP       000100          /* wakeup when output done */
#define TS_XCLUDE       000200          /* exclusive-use flag against open */
#define TS_TTSTOP       000400          /* output stopped by ctl-s */
#define TS_HUPCLS       001000          /* hang up upon last close */
#define TS_TBLOCK       002000          /* tandem queue blocked */
#define TS_RCOLL        004000          /* collision in read select */
#define TS_WCOLL        010000          /* collision in write select */
#define TS_NBIO         020000          /* tty in non-blocking mode */
#define TS_ASYNC        040000          /* tty in async i/o mode */

/* 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
#define DMGET           3