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

/*-
 * Copyright (c) 1982, 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)tty.h	7.10 (Berkeley) 6/26/91
 * $Header: /usr/bill/working/sys/sys/RCS/tty.h,v 1.3 92/01/21 21:51:49 william Exp $
 *
 * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
 * --------------------         -----   ----------------------
 * CURRENT PATCH LEVEL:         2       00061
 * --------------------         -----   ----------------------
 *
 * 18 Aug 92	Stephen McKay		Fixed RB_LEN macro
 * 11 Dec 92	Williams Jolitz		Fixed tty handling
 * --------------------         -----   ----------------------
 *
 */

#include <sys/termios.h>

/*
 * Ring buffers provide a contiguous, dense storage for
 * character data used by the tty driver.
 */
#define	RBSZ 1024

struct ringb {
	char	*rb_hd;	  /* head of buffer segment to be read */
	char	*rb_tl;	  /* tail of buffer segment to be written */
	char	rb_buf[RBSZ];	/* segment contents */
};

#define	RB_SUCC(rbp, p) \
		((p) >= (rbp)->rb_buf + RBSZ - 1 ? (rbp)->rb_buf : (p) + 1)

#define	RB_ROLLOVER(rbp, p) \
		((p) > (rbp)->rb_buf + RBSZ - 1 ? (rbp)->rb_buf : (p))

#define	RB_PRED(rbp, p) \
		((p) <= (rbp)->rb_buf ? (rbp)->rb_buf + RBSZ - 1 : (p) - 1)

#define	RB_LEN(rp) \
		((rp)->rb_hd <= (rp)->rb_tl ? (rp)->rb_tl - (rp)->rb_hd : \
		RBSZ - ((rp)->rb_hd - (rp)->rb_tl))

#define	RB_CONTIGPUT(rp) \
		(RB_PRED(rp, (rp)->rb_hd) < (rp)->rb_tl ?  \
			(rp)->rb_buf + RBSZ - (rp)->rb_tl : \
			RB_PRED(rp, (rp)->rb_hd) - (rp)->rb_tl)

#define	RB_CONTIGGET(rp) \
		((rp)->rb_hd <= (rp)->rb_tl ? (rp)->rb_tl - (rp)->rb_hd : \
		(rp)->rb_buf + RBSZ - (rp)->rb_hd)

/*
 * Per-tty structure.
 *
 * 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 {
	int	(*t_oproc)();		/* device */
	int	(*t_param)();		/* device */
	pid_t	t_rsel;			/* tty */
	pid_t	t_wsel;
	caddr_t	T_LINEP; 		/* XXX */
	caddr_t	t_addr;			/* ??? */
	dev_t	t_dev;			/* device */
	int	t_flags;		/* (compat) some of both */
	int	t_state;		/* some of both */
	struct	session *t_session;	/* tty */
	struct	pgrp *t_pgrp;		/* foreground process group */
	char	t_line;			/* glue */
	short	t_col;			/* tty */
	short	t_rocount, t_rocol;	/* tty */
	short	t_hiwat;		/* hi water mark */
	short	t_lowat;		/* low water mark */
	struct	winsize t_winsize;	/* window size */
	struct	termios t_termios;	/* termios state */
#define	t_iflag		t_termios.c_iflag
#define	t_oflag		t_termios.c_oflag
#define	t_cflag		t_termios.c_cflag
#define	t_lflag		t_termios.c_lflag
#define	t_min		t_termios.c_min
#define	t_time		t_termios.c_time
#define	t_cc		t_termios.c_cc
#define t_ispeed	t_termios.c_ispeed
#define t_ospeed	t_termios.c_ospeed
	long	t_cancc;		/* stats */
	long	t_rawcc;
	long	t_outcc;
	short	t_gen;			/* generation number */
	short	t_mask;			/* interrupt mask */
	struct	ringb t_raw;		/* ring buffers */
	struct	ringb t_can;
	struct	ringb t_out;
};

#define	TTIPRI	25			/* sleep priority for tty reads */
#define	TTOPRI	26			/* sleep priority for tty writes */

#define	TTMASK	15
#define	OBUFSIZ	100
#define	TTYHOG	1024

#ifdef KERNEL
#define TTMAXHIWAT	(RBSZ/2)	/* XXX */
#define TTMINHIWAT	128
#define TTMAXLOWAT	256
#define TTMINLOWAT	32
extern	struct ttychars ttydefaults;
#endif /* KERNEL */

/* internal state bits */
#define	TS_TIMEOUT	0x000001	/* delay timeout in progress */
#define	TS_WOPEN	0x000002	/* waiting for open to complete */
#define	TS_ISOPEN	0x000004	/* device is open */
#define	TS_FLUSH	0x000008	/* outq has been flushed during DMA */
#define	TS_CARR_ON	0x000010	/* software copy of carrier-present */
#define	TS_BUSY		0x000020	/* output in progress */
#define	TS_ASLEEP	0x000040	/* wakeup when output done */
#define	TS_XCLUDE	0x000080	/* exclusive-use flag against open */
#define	TS_TTSTOP	0x000100	/* output stopped by ctl-s */
/* was	TS_HUPCLS	0x000200 	 * hang up upon last close */
#define	TS_TBLOCK	0x000400	/* tandem queue blocked */
#define	TS_RCOLL	0x000800	/* collision in read select */
#define	TS_WCOLL	0x001000	/* collision in write select */
#define	TS_ASYNC	0x004000	/* tty in async i/o mode */
/* state for intra-line fancy editing work */
#define	TS_BKSL		0x010000	/* state for lowercase \ work */
#define	TS_ERASE	0x040000	/* within a \.../ for PRTRUB */
#define	TS_LNCH		0x080000	/* next character is literal */
#define	TS_TYPEN	0x100000	/* retyping suspended input (PENDIN) */
#define	TS_CNTTB	0x200000	/* counting tab width, ignore FLUSHO */

#define	TS_LOCAL	(TS_BKSL|TS_ERASE|TS_LNCH|TS_TYPEN|TS_CNTTB)

/* 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

struct speedtab {
        int sp_speed;
        int sp_code;
};
/*
 * Flags on character passed to ttyinput
 */
#define TTY_CHARMASK    0x000000ff      /* Character mask */
#define TTY_QUOTE       0x00000100      /* Character quoted */
#define TTY_ERRORMASK   0xff000000      /* Error mask */
#define TTY_FE          0x01000000      /* Framing error or BREAK condition */
#define TTY_PE          0x02000000      /* Parity error */

/*
 * Is tp controlling terminal for p
 */
#define isctty(p, tp)	((p)->p_session == (tp)->t_session && \
			 (p)->p_flag&SCTTY)
/*
 * Is p in background of tp
 */
#define isbackground(p, tp)	(isctty((p), (tp)) && \
				(p)->p_pgrp != (tp)->t_pgrp)
/*
 * Modem control commands (driver).
 */
#define	DMSET		0
#define	DMBIS		1
#define	DMBIC		2
#define	DMGET		3

#ifdef KERNEL
/* symbolic sleep message strings */
extern	 char ttyin[], ttyout[], ttopen[], ttclos[], ttybg[], ttybuf[];
#endif
Commit	Line	Data
15637ed4 RG	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
	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	*
	45	*/
	46
	47	#include <sys/termios.h>
	48
	49	/*
	50	* Ring buffers provide a contiguous, dense storage for
	51	* character data used by the tty driver.
	52	*/
	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 */
	59	};
	60
	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
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 */
93	pid_t t_rsel; /* tty */
94	pid_t t_wsel;
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 */
122	short t_mask; /* interrupt mask */
123	struct ringb t_raw; /* ring buffers */
124	struct ringb t_can;
125	struct ringb t_out;
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
136	#define TTMAXHIWAT (RBSZ/2) /* XXX */
137	#define TTMINHIWAT 128
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