LXR linux/include/linux/vt.h

   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