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1.1 root 1: /*-
2: * Copyright (c) 1982, 1986 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)tty.h 7.10 (Berkeley) 6/26/91
1.1.1.2 ! root 34: * $Header: /usr/bill/working/sys/sys/RCS/tty.h,v 1.3 92/01/21 21:51:49 william Exp $
! 35: *
! 36: * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
! 37: * -------------------- ----- ----------------------
! 38: * CURRENT PATCH LEVEL: 2 00061
! 39: * -------------------- ----- ----------------------
! 40: *
! 41: * 18 Aug 92 Stephen McKay Fixed RB_LEN macro
! 42: * 11 Dec 92 Williams Jolitz Fixed tty handling
! 43: * -------------------- ----- ----------------------
! 44: *
1.1 root 45: */
46:
47: #include <sys/termios.h>
48:
49: /*
1.1.1.2 ! root 50: * Ring buffers provide a contiguous, dense storage for
! 51: * character data used by the tty driver.
1.1 root 52: */
1.1.1.2 ! root 53: #define RBSZ 1024
! 54:
! 55: struct ringb {
! 56: char *rb_hd; /* head of buffer segment to be read */
! 57: char *rb_tl; /* tail of buffer segment to be written */
! 58: char rb_buf[RBSZ]; /* segment contents */
1.1 root 59: };
60:
1.1.1.2 ! root 61: #define RB_SUCC(rbp, p) \
! 62: ((p) >= (rbp)->rb_buf + RBSZ - 1 ? (rbp)->rb_buf : (p) + 1)
! 63:
! 64: #define RB_ROLLOVER(rbp, p) \
! 65: ((p) > (rbp)->rb_buf + RBSZ - 1 ? (rbp)->rb_buf : (p))
! 66:
! 67: #define RB_PRED(rbp, p) \
! 68: ((p) <= (rbp)->rb_buf ? (rbp)->rb_buf + RBSZ - 1 : (p) - 1)
! 69:
! 70: #define RB_LEN(rp) \
! 71: ((rp)->rb_hd <= (rp)->rb_tl ? (rp)->rb_tl - (rp)->rb_hd : \
! 72: RBSZ - ((rp)->rb_hd - (rp)->rb_tl))
! 73:
! 74: #define RB_CONTIGPUT(rp) \
! 75: (RB_PRED(rp, (rp)->rb_hd) < (rp)->rb_tl ? \
! 76: (rp)->rb_buf + RBSZ - (rp)->rb_tl : \
! 77: RB_PRED(rp, (rp)->rb_hd) - (rp)->rb_tl)
! 78:
! 79: #define RB_CONTIGGET(rp) \
! 80: ((rp)->rb_hd <= (rp)->rb_tl ? (rp)->rb_tl - (rp)->rb_hd : \
! 81: (rp)->rb_buf + RBSZ - (rp)->rb_hd)
! 82:
1.1 root 83: /*
84: * Per-tty structure.
85: *
86: * Should be split in two, into device and tty drivers.
87: * Glue could be masks of what to echo and circular buffer
88: * (low, high, timeout).
89: */
90: struct tty {
91: int (*t_oproc)(); /* device */
92: int (*t_param)(); /* device */
1.1.1.2 ! root 93: pid_t t_rsel; /* tty */
! 94: pid_t t_wsel;
1.1 root 95: caddr_t T_LINEP; /* XXX */
96: caddr_t t_addr; /* ??? */
97: dev_t t_dev; /* device */
98: int t_flags; /* (compat) some of both */
99: int t_state; /* some of both */
100: struct session *t_session; /* tty */
101: struct pgrp *t_pgrp; /* foreground process group */
102: char t_line; /* glue */
103: short t_col; /* tty */
104: short t_rocount, t_rocol; /* tty */
105: short t_hiwat; /* hi water mark */
106: short t_lowat; /* low water mark */
107: struct winsize t_winsize; /* window size */
108: struct termios t_termios; /* termios state */
109: #define t_iflag t_termios.c_iflag
110: #define t_oflag t_termios.c_oflag
111: #define t_cflag t_termios.c_cflag
112: #define t_lflag t_termios.c_lflag
113: #define t_min t_termios.c_min
114: #define t_time t_termios.c_time
115: #define t_cc t_termios.c_cc
116: #define t_ispeed t_termios.c_ispeed
117: #define t_ospeed t_termios.c_ospeed
118: long t_cancc; /* stats */
119: long t_rawcc;
120: long t_outcc;
121: short t_gen; /* generation number */
1.1.1.2 ! root 122: short t_mask; /* interrupt mask */
! 123: struct ringb t_raw; /* ring buffers */
! 124: struct ringb t_can;
! 125: struct ringb t_out;
1.1 root 126: };
127:
128: #define TTIPRI 25 /* sleep priority for tty reads */
129: #define TTOPRI 26 /* sleep priority for tty writes */
130:
131: #define TTMASK 15
132: #define OBUFSIZ 100
133: #define TTYHOG 1024
134:
135: #ifdef KERNEL
1.1.1.2 ! root 136: #define TTMAXHIWAT (RBSZ/2) /* XXX */
! 137: #define TTMINHIWAT 128
1.1 root 138: #define TTMAXLOWAT 256
139: #define TTMINLOWAT 32
140: extern struct ttychars ttydefaults;
141: #endif /* KERNEL */
142:
143: /* internal state bits */
144: #define TS_TIMEOUT 0x000001 /* delay timeout in progress */
145: #define TS_WOPEN 0x000002 /* waiting for open to complete */
146: #define TS_ISOPEN 0x000004 /* device is open */
147: #define TS_FLUSH 0x000008 /* outq has been flushed during DMA */
148: #define TS_CARR_ON 0x000010 /* software copy of carrier-present */
149: #define TS_BUSY 0x000020 /* output in progress */
150: #define TS_ASLEEP 0x000040 /* wakeup when output done */
151: #define TS_XCLUDE 0x000080 /* exclusive-use flag against open */
152: #define TS_TTSTOP 0x000100 /* output stopped by ctl-s */
153: /* was TS_HUPCLS 0x000200 * hang up upon last close */
154: #define TS_TBLOCK 0x000400 /* tandem queue blocked */
155: #define TS_RCOLL 0x000800 /* collision in read select */
156: #define TS_WCOLL 0x001000 /* collision in write select */
157: #define TS_ASYNC 0x004000 /* tty in async i/o mode */
158: /* state for intra-line fancy editing work */
159: #define TS_BKSL 0x010000 /* state for lowercase \ work */
160: #define TS_ERASE 0x040000 /* within a \.../ for PRTRUB */
161: #define TS_LNCH 0x080000 /* next character is literal */
162: #define TS_TYPEN 0x100000 /* retyping suspended input (PENDIN) */
163: #define TS_CNTTB 0x200000 /* counting tab width, ignore FLUSHO */
164:
165: #define TS_LOCAL (TS_BKSL|TS_ERASE|TS_LNCH|TS_TYPEN|TS_CNTTB)
166:
167: /* define partab character types */
168: #define ORDINARY 0
169: #define CONTROL 1
170: #define BACKSPACE 2
171: #define NEWLINE 3
172: #define TAB 4
173: #define VTAB 5
174: #define RETURN 6
175:
176: struct speedtab {
177: int sp_speed;
178: int sp_code;
179: };
180: /*
181: * Flags on character passed to ttyinput
182: */
183: #define TTY_CHARMASK 0x000000ff /* Character mask */
184: #define TTY_QUOTE 0x00000100 /* Character quoted */
185: #define TTY_ERRORMASK 0xff000000 /* Error mask */
186: #define TTY_FE 0x01000000 /* Framing error or BREAK condition */
187: #define TTY_PE 0x02000000 /* Parity error */
188:
189: /*
190: * Is tp controlling terminal for p
191: */
192: #define isctty(p, tp) ((p)->p_session == (tp)->t_session && \
193: (p)->p_flag&SCTTY)
194: /*
195: * Is p in background of tp
196: */
197: #define isbackground(p, tp) (isctty((p), (tp)) && \
198: (p)->p_pgrp != (tp)->t_pgrp)
199: /*
200: * Modem control commands (driver).
201: */
202: #define DMSET 0
203: #define DMBIS 1
204: #define DMBIC 2
205: #define DMGET 3
206:
207: #ifdef KERNEL
208: /* symbolic sleep message strings */
209: extern char ttyin[], ttyout[], ttopen[], ttclos[], ttybg[], ttybuf[];
210: #endif
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