tty.h,v

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date	97.09.21.19.26.19;	author dls;	state Dist;
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date	94.05.10.20.48.46;	author dls;	state Old;
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@/* tty.h */

#define	IBLEN		256		/* input buffer size		*/
#define	OBLEN		256		/* output buffer size		*/


/* terminal special characters */
struct tchars {
	unsigned char	tc_erase;
	unsigned char	tc_intr;
	unsigned char	tc_kill;
	unsigned char	tc_lnext;
	unsigned char	tc_reprint;
	unsigned char	tc_eof;
	unsigned char	tc_stop;
	unsigned char	tc_start;
	unsigned char	tc_susp;
	unsigned char	tc_werase;
	unsigned char	tc_eol;
};

struct tty {
	unsigned char	 tty_state;	/* TTYS_* below			*/
	struct devsw	*tty_pdev;	/* tty dev structure		*/
	struct devsw	*tty_phw;	/* hardware dev structure	*/
	struct tchars	 tty_tchars;	/* line editing characters	*/
	int		 tty_cpid;	/* controlling process		*/

	/* TTY input fields */
	int		 tty_isema;	/* 1/0 semaphore for tty input	*/
	unsigned char	 tty_iflags;	/* TIF_* below			*/
	unsigned short	 tty_istart;	/* index of first character	*/
	unsigned short	 tty_icount;	/* # characters in input buffer	*/
	unsigned char	 tty_in[IBLEN];

	/* TTY output fields */
	int		 tty_osema;	/* output buffer space semaphore*/
	unsigned char	 tty_oflags;	/* TOF_* below			*/
	unsigned short	 tty_ostart;	/* index of first character	*/
	unsigned short	 tty_ocount;	/* # characters in output buffer*/
	unsigned char	 tty_out[OBLEN];
	int		 tty_rows;
	int		 tty_cols;

	/* login information */
	int		 tty_uid;	/* user identifier		*/
	unsigned long	 tty_ltime;	/* login time			*/
	unsigned long	 tty_ctime;	/* last command time		*/
};

/* TTY states */

#define	TTYS_FREE	0
#define	TTYS_ALLOC	1

/* TTY input flags */

#define	TIF_NOBLOCK	0x0001		/* don't block on input		*/
#define	TIF_NOECHO	0x0002		/* echo input			*/
#define	TIF_RAW		0x0004
#define	TIF_CBREAK	0x0008
#define	TIF_EXCLUSIVE	0x0010
#define	TIF_EOF		0x0020		/* have seen EOF		*/

/* TTY output flags */

#define	TOF_NOBLOCK	0x0001		/* don't block on output	*/
#define	TOF_SYNC	0x0002		/* do synchronous output	*/
#define	TOF_RAW		0x0004		/* do raw output		*/

/* control() functions */

#define TTC_CPID	0x0001		/* set controlling PID		*/
#define	TTC_SYNC	0x0002		/* do synchronous output	*/
#define	TTC_GIF		0x0003		/* get input flags		*/
#define	TTC_GOF		0x0004		/* get output flags		*/
#define	TTC_NEXTC	0x0005		/* peek at next character	*/
#define	TTC_SUSER	0x0006		/* set uid for a tty		*/
#define	TTC_CUSER	0x0007		/* clear uid for a tty		*/

#define	NOCHAR		256

extern struct tty	ttytab[];
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#define IOCHERR		0200		/* bit set on when an error	*/
					/* occurred reading the char.	*/
#define	OBMINSP		40		/* min space in buffer before	*/
					/* processes awakened to write	*/
#define	EBUFLEN		50		/* size of echo queue		*/

/* size constants */

#ifndef	Ntty
#define	Ntty		1		/* number of serial tty lines	*/
#endif
#ifndef	IBUFLEN
#define	IBUFLEN		512		/* num.	chars in input queue	*/
#endif
#ifndef	OBUFLEN
#define	OBUFLEN		512		/* num.	chars in output	queue	*/
#endif

/* mode constants */

#define	IMRAW		'R'		/* raw mode => nothing done	*/
#define	IMCOOKED	'C'		/* cooked mode => line editing	*/
#define	IMCBREAK	'K'		/* honor echo, etc, no line edit*/
#define	OMRAW		'R'		/* raw mode => normal processing*/

struct	tty	{			/* tty line control block	*/
	int	ihead;			/* head of input queue		*/
	int	itail;			/* tail of input queue		*/
	char	ibuff[IBUFLEN];		/* input buffer for this line	*/
	int	isem;			/* input semaphore		*/
	int	icnt;			/* count of chars in input buf	*/
	int	ohead;			/* head of output queue		*/
	int	otail;			/* tail of output queue		*/
	char	obuff[OBUFLEN];		/* output buffer for this line	*/
	int	osem;			/* output semaphore		*/
	int	ocnt;			/* count of chars in output buf	*/
	int	odsend;			/* sends delayed for space	*/
	int	ehead;			/* head of echo queue		*/
	int	etail;			/* tail of echo queue		*/
	char	ebuff[EBUFLEN];		/* echo queue			*/
	char	imode;			/* IMRAW, IMCBREAK, IMCOOKED	*/
	Bool	iecho;			/* is input echoed?		*/
	Bool	ieback;			/* do erasing backspace on echo?*/
	Bool	evis;			/* echo control chars as ^X ?	*/
	Bool	ecrlf;			/* echo CR-LF for newline?	*/
	Bool	icrlf;			/* map '\r' to '\n' on input?	*/
	Bool	ierase;			/* honor erase character?	*/
	char	ierasec;		/* erases character, usu. backsp*/
	Bool	ikill;			/* honor line kill character?	*/
	char	ikillc;			/* line kill character		*/
	Bool	iintr;			/* is interrupt char honored?	*/
	char	iintrc;			/* interrupt character		*/
	int	iintpid;		/* interrupt process id		*/
	Bool	ieof;			/* honor end-of-file char?	*/
	char	ieofc;			/* end-of-file character	*/
	int	icursor;		/* current cursor position	*/
	Bool	oflow;			/* honor ostop/ostart?		*/
	Bool	oheld;			/* output currently being held?	*/
	char	ostop;			/* character that stops output	*/
	char	ostart;			/* character that starts output	*/
	Bool	ocrlf;			/* echo CR/LF for LF ?		*/
	char	ifullc;			/* char to send when input full	*/
	struct	zscc_device	*ioaddr;	/* device address of this unit	*/
	int	intrstate;		/* device interrupt state	*/
	Bool	tbusy;			/* terminal busy bit		*/
	char	constatus;		/* current device contol status */
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extern	struct	tty tty[];
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#define	ATSIGN	'@@'
#define	BACKSP	'\b'
#define	BELL	'\007'
#define	BLANK	' '
#define	EOFC	'\004'			/* end-of-file character (^D)	*/
#define	KILLCH	'\025'			/* line kill character (^U)	*/
#define	NEWLINE	'\n'
#define	RETURN	'\r'
#define	STOPCH	'\023'			/* control-S stops output	*/
#define	STRTCH	'\021'			/* control-Q restarts output	*/
#define	INTRCH	'\002'			/* control-B is interrupt	*/
#define	UPARROW	'^'

/* ttycontrol function codes */

#define	TCSETBRK	1		/* turn on BREAK in transmitter	*/
#define	TCRSTBRK	2		/* turn off BREAK "       "	*/
#define	TCNEXTC		3		/* look ahead 1 character	*/
#define	TCMODER		4		/* set input mode to raw	*/
#define	TCMODEC		5		/* set input mode to cooked	*/
#define	TCMODEK		6		/* set input mode to cbreak	*/
#define	TCICHARS	8		/* return number of input chars	*/
#define	TCECHO		9		/* turn on echo			*/
#define	TCNOECHO	10		/* turn off echo		*/
#define	TCINT		11		/* set input interrupt pid	*/
#define	TCINTCH		12		/* set input interrupt char	*/
#define	TCNOINT		13		/* turn off input interrupt	*/
#define	TFULLC		BELL		/* char to echo when buffer full*/
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#define	NOCHAR		256		/* no character to return	*/
@