linux/include/linux/vt.h
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   1#ifndef _LINUX_VT_H
   2#define _LINUX_VT_H
   3
   4
   5/*
   6 * These constants are also useful for user-level apps (e.g., VC
   7 * resizing).
   8 */
   9#define MIN_NR_CONSOLES 1       /* must be at least 1 */
  10#define MAX_NR_CONSOLES 63      /* serial lines start at 64 */
  11#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
  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#ifdef __KERNEL__
  88
  89/* Virtual Terminal events. */
  90#define VT_ALLOCATE             0x0001 /* Console got allocated */
  91#define VT_DEALLOCATE           0x0002 /* Console will be deallocated */
  92#define VT_WRITE                0x0003 /* A char got output */
  93#define VT_UPDATE               0x0004 /* A bigger update occurred */
  94#define VT_PREWRITE             0x0005 /* A char is about to be written to the console */
  95
  96#ifdef CONFIG_VT_CONSOLE
  97
  98extern int vt_kmsg_redirect(int new);
  99
 100#else
 101
 102static inline int vt_kmsg_redirect(int new)
 103{
 104        return 0;
 105}
 106
 107#endif
 108
 109#endif /* __KERNEL__ */
 110
 111#define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
 112
 113#endif /* _LINUX_VT_H */
 114
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