root/include/linux/vt.h

INCLUDED FROM

#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 */