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1.1 root 1: /* tty.h 4.1 11/9/80 */
2:
3: #include <sgtty.h>
4: #include <sys/ioctl.h>
5:
6: /*
7: * A clist structure is the head
8: * of a linked list queue of characters.
9: * The characters are stored in
10: * blocks containing a link and CBSIZE (param.h)
11: * characters. The routines getc, putc, ... in prim.c
12: * manipulate these structures.
13: */
14: struct clist
15: {
16: int c_cc; /* character count */
17: char *c_cf; /* pointer to first char */
18: char *c_cl; /* pointer to last char */
19: };
20:
21: /*
22: * A tty structure is needed for
23: * each UNIX character device that
24: * is used for normal terminal IO.
25: * The routines in tty.c handle the
26: * common code associated with
27: * these structures. The definition
28: * and device dependent code is in
29: * each driver. (cons.c, dh.c, dz.c, kl.c)
30: */
31: struct tty
32: {
33: union {
34: struct {
35: struct clist T_rawq;
36: struct clist T_canq;
37: } t_t;
38: #define t_rawq t_nu.t_t.T_rawq /* raw characters or partial line */
39: #define t_canq t_nu.t_t.T_canq /* complete input lines */
40: struct {
41: struct buf *T_bufp;
42: char *T_cp;
43: int T_inbuf;
44: int T_rec;
45: } t_n;
46: #define t_bufp t_nu.t_n.T_bufp /* buffer allocated to protocol */
47: #define t_cp t_nu.t_n.T_cp /* pointer into the ripped off buffer */
48: #define t_inbuf t_nu.t_n.T_inbuf /* number chars in the buffer */
49: #define t_rec t_nu.t_n.T_rec /* have a complete record */
50: } t_nu;
51: struct clist t_outq; /* output list to device */
52: int (*t_oproc)(); /* routine to start output */
53: int (*t_iproc)(); /* routine to start input */
54: struct chan *t_chan; /* destination channel */
55: caddr_t t_linep; /* aux line discipline pointer */
56: caddr_t t_addr; /* device address */
57: dev_t t_dev; /* device number */
58: short t_flags; /* mode, settable by ioctl call */
59: short t_state; /* internal state, not visible externally */
60: short t_pgrp; /* process group name */
61: char t_delct; /* number of delimiters in raw q */
62: char t_line; /* line discipline */
63: char t_col; /* printing column of device */
64: char t_erase; /* erase character */
65: char t_kill; /* kill character */
66: char t_char; /* character temporary */
67: char t_ispeed; /* input speed */
68: char t_ospeed; /* output speed */
69: /* begin local */
70: char t_rocount; /* chars input since a ttwrite() */
71: char t_rocol; /* t_col when first input this line */
72: struct ltchars t_lchr; /* local special characters */
73: short t_local; /* local mode word */
74: short t_lstate; /* local state bits */
75: /* end local */
76: union {
77: struct tchars t_chr;
78: struct clist t_ctlq;
79: } t_un;
80: };
81:
82: #define tun tp->t_un.t_chr
83: #define tlun tp->t_lchr
84:
85: #define TTIPRI 28
86: #define TTOPRI 29
87:
88: #define CTRL(c) ('c'&037)
89:
90: /* default special characters */
91: #define CERASE '#'
92: #define CEOT CTRL(d)
93: #define CKILL '@'
94: #define CQUIT 034 /* FS, cntl shift L */
95: #define CINTR 0177 /* DEL */
96: #define CSTOP CTRL(s)
97: #define CSTART CTRL(q)
98: #define CBRK 0377
99:
100: /* limits */
101: #define NSPEEDS 16
102: #define TTMASK 15
103: #ifdef KERNEL
104: short tthiwat[NSPEEDS], ttlowat[NSPEEDS];
105: #define TTHIWAT(tp) tthiwat[(tp)->t_ospeed&TTMASK]
106: #define TTLOWAT(tp) ttlowat[(tp)->t_ospeed&TTMASK]
107: #endif
108: #define TTYHOG 256
109:
110: /* hardware bits */
111: #define DONE 0200
112: #define IENABLE 0100
113:
114: /* internal state bits */
115: #define TIMEOUT 01 /* delay timeout in progress */
116: #define WOPEN 02 /* waiting for open to complete */
117: #define ISOPEN 04 /* device is open */
118: #define FLUSH 010 /* outq has been flushed during DMA */
119: #define CARR_ON 020 /* software copy of carrier-present */
120: #define BUSY 040 /* output in progress */
121: #define ASLEEP 0100 /* wakeup when output done */
122: #define XCLUDE 0200 /* exclusive-use flag against open */
123: #define TTSTOP 0400 /* output stopped by ctl-s */
124: #define HUPCLS 01000 /* hang up upon last close */
125: #define TBLOCK 02000 /* tandem queue blocked */
126: #define SPEEDS 04000 /* t_ispeed and t_ospeed used by driver */
127: #define PROTO1 010000 /* reserved for line discipline */
128: #define EXTPROC 020000 /* external processor (kmc) */
129: #define FSLEEP 040000 /* Wakeup on input framing */
130: #define CNTLQ 0100000 /* interpret t_un as clist */
131:
132: /* define partab character types */
133: #define ORDINARY 0
134: #define CONTROL 1
135: #define BACKSPACE 2
136: #define NEWLINE 3
137: #define TAB 4
138: #define VTAB 5
139: #define RETURN 6
140:
141: /* define dmctl actions */
142: #define DMSET 0
143: #define DMBIS 1
144: #define DMBIC 2
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