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    Length: 3241 (0xca9)
    Types: TextFile
    Notes: UNIX file
    Names: »vt.h«

└─⟦a6ab2eb36⟧ Bits:30004042/kconfig3.imd SW95705I 386/ix Multi-user Release 1.2
└─⟦a6ab2eb36⟧ UNIX Filesystem
    └─⟦this⟧ »kc/new/usr/include/sys/vt.h« 

TextFile

/*
 * definitions for PC AT virtual terminal driver
 */

/*
 * Copyrighted as an unpublished work.
 * (c) Copyright 1986 INTERACTIVE Systems Corporation
 * All rights reserved.
 *
 * RESTRICTED RIGHTS
 *
 * These programs are supplied under a license.  They may be used,
 * disclosed, and/or copied only as permitted under such license
 * agreement.  Any copy must contain the above copyright notice and
 * this restricted rights notice.  Use, copying, and/or disclosure
 * of the programs is strictly prohibited unless otherwise provided
 * in the license agreement.
 */

#ident "@(#)vt.h	1.5 - 88/01/18"

#define	VTINDEX(dev)	(((dev) >> 5) & 0x07)

#define	VT_FORCE	1	/* flag to force a vt switch */
#define	VT_NOFORCE	0	/* dont force a vt switch */

/*
 * Bits in vtty flags word.
 */
#define	VT_ACTIVE	0x0001	/* set if this is the active vt */
#define	VT_PROCMOD	0x0002	/* set if vt has process control mode set */
#define	VT_WAIT		0x0004	/* set if writes to hang if not active vt */
#define	VT_HIDDEN	0x0008	/* set if vt on ring is to be skipped */
#define	VT_WAITACT	0x0010	/* set if vt needs wakeup when switched to */

/*
 * all vttys for a device should be circularly linked via the
 * link field of the structure, active vttys are doubly circularly
 * linked via the next and prev fields.
 */
struct vtty {	/* virtual terminal structure */
	struct vtty	*link;	/* next vtty on device */
	struct vtty	*prev;	/* previous vtty in ring */
	struct vtty	*next;	/* next vtty in ring */
	struct vtty	*switchto;	/* vtty to be activated */
	struct	tty	*tp;	/* tty associated with this vtty */
	caddr_t		dsp;	/* device specific info for this vtty */
	struct proc	*procp;	/* ptr to process controlling this vtty */
	short	pid;		/* pid of process controlling this vtty */
	ushort	flags;		/* flags for this vtty */
	char	opencnt;	/* number of opens on this vtty */
	char	vtno;		/* vt index number of this vtty */
	short	relsig;		/* signal to send to request release */
	short	acqsig;		/* signal to send to signal acquisition */
	short	frsig;		/* signal to send on forced removal */
	int	timeid;		/* timeout id for this vtty */
	int	(*dsactivate)(); /* device specific activation routine */
	int	(*dsrefuse)();	/* device specific release refused routine */
	int	(*dsautomode)(); /* device specific switch to auto mode */
};

/*
 * IOCTLs supported by the VT
 */
#define VTIOC		('v'<<8)
#define VT_OPENQRY	(VTIOC|1)	/* inquires if this vt already open */
#define	VT_SETMODE	(VTIOC|2)	/* set vt into auto or process mode */
#define	VT_GETMODE	(VTIOC|3)	/* returns mode vt is currently in */
#define	VT_RELDISP	(VTIOC|4)	/* tells vt when display released */
#define	VT_ACTIVATE	(VTIOC|5)	/* activates specified vt */
#define	VT_WAITACTIVE	(VTIOC|6)	/* wait for vt to be activated */

struct vt_mode {
	char	mode;	/* mode to set vt into */
	char	waitv;	/* if != 0, vt hangs on writes when not active */
	short	relsig;	/* signal to use for release request */
	short	acqsig;	/* signal to use for display acquired */
	short	frsig;	/* signal to use for forced release */
};

#define	VT_AUTO		0	/* this vt's switching is automatic */
#define	VT_PROCESS	1	/* this vt's switching controlled by process */
#define	VT_ACKACQ	2	/* acquire acknowledge code */