mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Samuel Thibault](/assets/img/avatar_default.png)
Some external modules like Speakup need to monitor console output. This adds a VT notifier that such modules can use to get console output events: allocation, deallocation, writes, other updates (cursor position, switch, etc.) [akpm@linux-foundation.org: fix headers_check] Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
#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 */
|
|
#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
|
|
#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
|
|
/* 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 */
|