1#ifndef _LINUX_VT_H
2#define _LINUX_VT_H
3
4#ifdef __KERNEL__
5struct notifier_block;
6
7struct vt_notifier_param {
8	struct vc_data *vc;	/* VC on which the update happened */
9	unsigned int c;		/* Printed char */
10};
11
12extern int register_vt_notifier(struct notifier_block *nb);
13extern int unregister_vt_notifier(struct notifier_block *nb);
14#endif
15
16/*
17 * These constants are also useful for user-level apps (e.g., VC
18 * resizing).
19 */
20#define MIN_NR_CONSOLES 1       /* must be at least 1 */
21#define MAX_NR_CONSOLES	63	/* serial lines start at 64 */
22#define MAX_NR_USER_CONSOLES 63	/* must be root to allocate above this */
23		/* Note: the ioctl VT_GETSTATE does not work for
24		   consoles 16 and higher (since it returns a short) */
25
26/* 0x56 is 'V', to avoid collision with termios and kd */
27
28#define VT_OPENQRY	0x5600	/* find available vt */
29
30struct vt_mode {
31	char mode;		/* vt mode */
32	char waitv;		/* if set, hang on writes if not active */
33	short relsig;		/* signal to raise on release req */
34	short acqsig;		/* signal to raise on acquisition */
35	short frsig;		/* unused (set to 0) */
36};
37#define VT_GETMODE	0x5601	/* get mode of active vt */
38#define VT_SETMODE	0x5602	/* set mode of active vt */
39#define		VT_AUTO		0x00	/* auto vt switching */
40#define		VT_PROCESS	0x01	/* process controls switching */
41#define		VT_ACKACQ	0x02	/* acknowledge switch */
42
43struct vt_stat {
44	unsigned short v_active;	/* active vt */
45	unsigned short v_signal;	/* signal to send */
46	unsigned short v_state;		/* vt bitmask */
47};
48#define VT_GETSTATE	0x5603	/* get global vt state info */
49#define VT_SENDSIG	0x5604	/* signal to send to bitmask of vts */
50
51#define VT_RELDISP	0x5605	/* release display */
52
53#define VT_ACTIVATE	0x5606	/* make vt active */
54#define VT_WAITACTIVE	0x5607	/* wait for vt active */
55#define VT_DISALLOCATE	0x5608  /* free memory associated to vt */
56
57struct vt_sizes {
58	unsigned short v_rows;		/* number of rows */
59	unsigned short v_cols;		/* number of columns */
60	unsigned short v_scrollsize;	/* number of lines of scrollback */
61};
62#define VT_RESIZE	0x5609	/* set kernel's idea of screensize */
63
64struct vt_consize {
65	unsigned short v_rows;	/* number of rows */
66	unsigned short v_cols;	/* number of columns */
67	unsigned short v_vlin;	/* number of pixel rows on screen */
68	unsigned short v_clin;	/* number of pixel rows per character */
69	unsigned short v_vcol;	/* number of pixel columns on screen */
70	unsigned short v_ccol;	/* number of pixel columns per character */
71};
72#define VT_RESIZEX      0x560A  /* set kernel's idea of screensize + more */
73#define VT_LOCKSWITCH   0x560B  /* disallow vt switching */
74#define VT_UNLOCKSWITCH 0x560C  /* allow vt switching */
75#define VT_GETHIFONTMASK 0x560D  /* return hi font mask */
76
77#endif /* _LINUX_VT_H */
78