1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _LINUX_VT_H
3#define _LINUX_VT_H
4
5
6/*
7 * These constants are also useful for user-level apps (e.g., VC
8 * resizing).
9 */
10#define MIN_NR_CONSOLES 1 /* must be at least 1 */
11#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
12 /* Note: the ioctl VT_GETSTATE does not work for
13 consoles 16 and higher (since it returns a short) */
14
15/* 0x56 is 'V', to avoid collision with termios and kd */
16
17#define VT_OPENQRY 0x5600 /* find available vt */
18
19struct vt_mode {
20 char mode; /* vt mode */
21 char waitv; /* if set, hang on writes if not active */
22 short relsig; /* signal to raise on release req */
23 short acqsig; /* signal to raise on acquisition */
24 short frsig; /* unused (set to 0) */
25};
26#define VT_GETMODE 0x5601 /* get mode of active vt */
27#define VT_SETMODE 0x5602 /* set mode of active vt */
28#define VT_AUTO 0x00 /* auto vt switching */
29#define VT_PROCESS 0x01 /* process controls switching */
30#define VT_ACKACQ 0x02 /* acknowledge switch */
31
32struct vt_stat {
33 unsigned short v_active; /* active vt */
34 unsigned short v_signal; /* signal to send */
35 unsigned short v_state; /* vt bitmask */
36};
37#define VT_GETSTATE 0x5603 /* get global vt state info */
38#define VT_SENDSIG 0x5604 /* signal to send to bitmask of vts */
39
40#define VT_RELDISP 0x5605 /* release display */
41
42#define VT_ACTIVATE 0x5606 /* make vt active */
43#define VT_WAITACTIVE 0x5607 /* wait for vt active */
44#define VT_DISALLOCATE 0x5608 /* free memory associated to vt */
45
46struct vt_sizes {
47 unsigned short v_rows; /* number of rows */
48 unsigned short v_cols; /* number of columns */
49 unsigned short v_scrollsize; /* number of lines of scrollback */
50};
51#define VT_RESIZE 0x5609 /* set kernel's idea of screensize */
52
53struct vt_consize {
54 unsigned short v_rows; /* number of rows */
55 unsigned short v_cols; /* number of columns */
56 unsigned short v_vlin; /* number of pixel rows on screen */
57 unsigned short v_clin; /* number of pixel rows per character */
58 unsigned short v_vcol; /* number of pixel columns on screen */
59 unsigned short v_ccol; /* number of pixel columns per character */
60};
61#define VT_RESIZEX 0x560A /* set kernel's idea of screensize + more */
62#define VT_LOCKSWITCH 0x560B /* disallow vt switching */
63#define VT_UNLOCKSWITCH 0x560C /* allow vt switching */
64#define VT_GETHIFONTMASK 0x560D /* return hi font mask */
65
66struct vt_event {
67 unsigned int event;
68#define VT_EVENT_SWITCH 0x0001 /* Console switch */
69#define VT_EVENT_BLANK 0x0002 /* Screen blank */
70#define VT_EVENT_UNBLANK 0x0004 /* Screen unblank */
71#define VT_EVENT_RESIZE 0x0008 /* Resize display */
72#define VT_MAX_EVENT 0x000F
73 unsigned int oldev; /* Old console */
74 unsigned int newev; /* New console (if changing) */
75 unsigned int pad[4]; /* Padding for expansion */
76};
77
78#define VT_WAITEVENT 0x560E /* Wait for an event */
79
80struct vt_setactivate {
81 unsigned int console;
82 struct vt_mode mode;
83};
84
85#define VT_SETACTIVATE 0x560F /* Activate and set the mode of a console */
86
87#endif /* _LINUX_VT_H */
88

source code of include/linux/vt.h