include/linux/vt.h

   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
  19 struct 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_PROCESS_AUTO 0x02    /* process is notified of switching */
  31
  32 struct 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 #define         VT_ACKACQ       0x02    /* acknowledge switch */
  42
  43 #define VT_ACTIVATE     0x5606  /* make vt active */
  44 #define VT_WAITACTIVE   0x5607  /* wait for vt active */
  45 #define VT_DISALLOCATE  0x5608  /* free memory associated to vt */
  46
  47 struct vt_sizes {
  48         unsigned short v_rows;          /* number of rows */
  49         unsigned short v_cols;          /* number of columns */
  50         unsigned short v_scrollsize;    /* number of lines of scrollback */
  51 };
  52 #define VT_RESIZE       0x5609  /* set kernel's idea of screensize */
  53
  54 struct vt_consize {
  55         unsigned short v_rows;  /* number of rows */
  56         unsigned short v_cols;  /* number of columns */
  57         unsigned short v_vlin;  /* number of pixel rows on screen */
  58         unsigned short v_clin;  /* number of pixel rows per character */
  59         unsigned short v_vcol;  /* number of pixel columns on screen */
  60         unsigned short v_ccol;  /* number of pixel columns per character */
  61 };
  62 #define VT_RESIZEX      0x560A  /* set kernel's idea of screensize + more */
  63 #define VT_LOCKSWITCH   0x560B  /* disallow vt switching */
  64 #define VT_UNLOCKSWITCH 0x560C  /* allow vt switching */
  65 #define VT_GETHIFONTMASK 0x560D  /* return hi font mask */
  66
  67 struct vt_event {
  68         unsigned int event;
  69 #define VT_EVENT_SWITCH         0x0001  /* Console switch */
  70 #define VT_EVENT_BLANK          0x0002  /* Screen blank */
  71 #define VT_EVENT_UNBLANK        0x0004  /* Screen unblank */
  72 #define VT_EVENT_RESIZE         0x0008  /* Resize display */
  73 #define VT_MAX_EVENT            0x000F
  74         unsigned int oldev;             /* Old console */
  75         unsigned int newev;             /* New console (if changing) */
  76         unsigned int pad[4];            /* Padding for expansion */
  77 };
  78
  79 #define VT_WAITEVENT    0x560E  /* Wait for an event */
  80
  81 struct vt_setactivate {
  82         unsigned int console;
  83         struct vt_mode mode;
  84 };
  85
  86 #define VT_SETACTIVATE  0x560F  /* Activate and set the mode of a console */
  87
  88 #ifdef __KERNEL__
  89
  90 #ifdef CONFIG_VT_CONSOLE
  91
  92 extern int vt_kmsg_redirect(int new);
  93
  94 #else
  95
  96 static inline int vt_kmsg_redirect(int new)
  97 {
  98         return 0;
  99 }
 100
 101 #endif
 102
 103 #endif /* __KERNEL__ */
 104
 105 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
 106
 107 #endif /* _LINUX_VT_H */