Linux0.96c/include/sys/vt.h

#ifndef _VT_H
#define _VT_H

/* 0x56 is 'V', to avoid collision with termios and kd */

#define VT_OPENQRY	0x5600	/* find available vt */

struct vt_mode {
	char mode;		/* vt mode */
	char waitv;		/* if set, hang on writes if not active */
	short relsig;		/* signal to raise on release req */
	short acqsig;		/* signal to raise on acquisition */
	short frsig;		/* unused (set to 0) */
};
#define VT_GETMODE	0x5601	/* get mode of active vt */
#define VT_SETMODE	0x5602	/* set mode of active vt */
#define		VT_AUTO		0x00	/* auto vt switching */
#define		VT_PROCESS	0x01	/* process controls switching */

struct vt_stat {
	ushort v_active;	/* active vt */
	ushort v_signal;	/* signal to send */
	ushort v_state;		/* vt bitmask */
};
#define VT_GETSTATE	0x5603	/* get global vt state info */
#define VT_SENDSIG	0x5604	/* signal to send to bitmask of vts */

#define VT_RELDISP	0x5605	/* release display */

#define VT_ACTIVATE	0x5606	/* make vt active */

#endif /* _VT_H */