aboutsummaryrefslogtreecommitdiff
path: root/include/linux/vt.h
blob: 2ba4d211e30ac9bbd6c01a24aa9b8727ffdc7b60 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
#ifndef _LINUX_VT_H
#define _LINUX_VT_H

#ifdef __KERNEL__
struct notifier_block;

struct vt_notifier_param {
	struct vc_data *vc;	/* VC on which the update happened */
	unsigned int c;		/* Printed char */
};

extern int register_vt_notifier(struct notifier_block *nb);
extern int unregister_vt_notifier(struct notifier_block *nb);
#endif

/*
 * These constants are also useful for user-level apps (e.g., VC
 * resizing).
 */
#define MIN_NR_CONSOLES 1       /* must be at least 1 */
#if (CONFIG_NR_TTY_DEVICES < 4)
/* Lower Limit */
#define MAX_NR_CONSOLES	4	/* serial lines start at 64 */
#define MAX_NR_USER_CONSOLES 4	/* must be root to allocate above this */
#elif (CONFIG_NR_TTY_DEVICES > 63)
/* Upper Limit */
#define MAX_NR_CONSOLES	63	/* serial lines start at 64 */
#define MAX_NR_USER_CONSOLES 63	/* must be root to allocate above this */
#else
/* They chose a sensible number */
#define MAX_NR_CONSOLES CONFIG_NR_TTY_DEVICES
#define MAX_NR_USER_CONSOLES CONFIG_NR_TTY_DEVICES
#endif
		/* Note: the ioctl VT_GETSTATE does not work for
		   consoles 16 and higher (since it returns a short) */

/* 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 */
#define		VT_ACKACQ	0x02	/* acknowledge switch */

struct vt_stat {
	unsigned short v_active;	/* active vt */
	unsigned short v_signal;	/* signal to send */
	unsigned short 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 */
#define VT_WAITACTIVE	0x5607	/* wait for vt active */
#define VT_DISALLOCATE	0x5608  /* free memory associated to vt */

struct vt_sizes {
	unsigned short v_rows;		/* number of rows */
	unsigned short v_cols;		/* number of columns */
	unsigned short v_scrollsize;	/* number of lines of scrollback */
};
#define VT_RESIZE	0x5609	/* set kernel's idea of screensize */

struct vt_consize {
	unsigned short v_rows;	/* number of rows */
	unsigned short v_cols;	/* number of columns */
	unsigned short v_vlin;	/* number of pixel rows on screen */
	unsigned short v_clin;	/* number of pixel rows per character */
	unsigned short v_vcol;	/* number of pixel columns on screen */
	unsigned short v_ccol;	/* number of pixel columns per character */
};
#define VT_RESIZEX      0x560A  /* set kernel's idea of screensize + more */
#define VT_LOCKSWITCH   0x560B  /* disallow vt switching */
#define VT_UNLOCKSWITCH 0x560C  /* allow vt switching */
#define VT_GETHIFONTMASK 0x560D  /* return hi font mask */

#endif /* _LINUX_VT_H */