KernelLand/Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Kernel
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * drv/vterm.c
   6  * - Virtual Terminal - Initialisation and VFS Interface
   7  */
   8 #define DEBUG   0
   9 #include "vterm.h"
  10 #include <fs_devfs.h>
  11 #include <modules.h>
  12 #include <api_drv_keyboard.h>
  13 #include <api_drv_video.h>
  14 #include <errno.h>
  15 #include <semaphore.h>
  16
  17 // === CONSTANTS ===
  18 #define VERSION ((0<<8)|(50))
  19
  20 #define NUM_VTS 8
  21 //#define DEFAULT_OUTPUT        "BochsGA"
  22 #define DEFAULT_OUTPUT  "Vesa"
  23 #define FALLBACK_OUTPUT "x86_VGAText"
  24 #define DEFAULT_INPUT   "Keyboard"
  25 #define DEFAULT_WIDTH   640
  26 #define DEFAULT_HEIGHT  480
  27 #define DEFAULT_SCROLLBACK      4       // 2 Screens of text + current screen
  28 //#define DEFAULT_SCROLLBACK    0
  29
  30 // === TYPES ===
  31
  32 // === IMPORTS ===
  33 extern void     Debug_SetKTerminal(const char *File);
  34
  35 // === PROTOTYPES ===
  36  int    VT_Install(char **Arguments);
  37 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  38 tVFS_Node       *VT_FindDir(tVFS_Node *Node, const char *Name);
  39  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  40 size_t  VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer);
  41 size_t  VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer);
  42  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  43 void    VT_Terminal_Reference(tVFS_Node *Node);
  44 void    VT_Terminal_Close(tVFS_Node *Node);
  45 //void  VT_SetTerminal(int Term);
  46
  47 // === CONSTANTS ===
  48
  49 // === GLOBALS ===
  50 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, NULL);
  51 tVFS_NodeType   gVT_RootNodeType = {
  52         .TypeName = "VTerm Root",
  53         .ReadDir = VT_ReadDir,
  54         .FindDir = VT_FindDir,
  55         .IOCtl = VT_Root_IOCtl
  56         };
  57 tVFS_NodeType   gVT_TermNodeType = {
  58         .TypeName = "VTerm",
  59         .Read = VT_Read,
  60         .Write = VT_Write,
  61         .IOCtl = VT_Terminal_IOCtl
  62         };
  63 tDevFS_Driver   gVT_DrvInfo = {
  64         NULL, "VTerm",
  65         {
  66         .Flags = VFS_FFLAG_DIRECTORY,
  67         .Size = NUM_VTS,
  68         .Inode = -1,
  69         .NumACLs = 0,
  70         .Type = &gVT_RootNodeType
  71         }
  72 };
  73 // --- Terminals ---
  74 tVTerm  gVT_Terminals[NUM_VTS];
  75  int    giVT_CurrentTerminal = 0;
  76 tVTerm  *gpVT_CurTerm = &gVT_Terminals[0];
  77 // --- Video State ---
  78 short   giVT_RealWidth  = DEFAULT_WIDTH;        //!< Screen Width
  79 short   giVT_RealHeight = DEFAULT_HEIGHT;       //!< Screen Height
  80  int    giVT_Scrollback = DEFAULT_SCROLLBACK;
  81 // --- Driver Handles ---
  82 char    *gsVT_OutputDevice = NULL;
  83 char    *gsVT_InputDevice = NULL;
  84  int    giVT_OutputDevHandle = -2;
  85  int    giVT_InputDevHandle = -2;
  86
  87 // === CODE ===
  88 /**
  89  * \fn int VT_Install(char **Arguments)
  90  * \brief Installs the Virtual Terminal Driver
  91  */
  92 int VT_Install(char **Arguments)
  93 {
  94          int    i;
  95
  96         // Scan Arguments
  97         if(Arguments)
  98         {
  99                 char    **args;
 100                 const char      *arg;
 101                 for(args = Arguments; (arg = *args); args++ )
 102                 {
 103                         char    data[strlen(arg)+1];
 104                         char    *opt = data;
 105                         char    *val;
 106
 107                         val = strchr(arg, '=');
 108                         strcpy(data, arg);
 109                         if( val ) {
 110                                 data[ val - arg ] = '\0';
 111                                 val ++;
 112                         }
 113                         Log_Debug("VTerm", "Argument '%s'", arg);
 114
 115                         if( strcmp(opt, "Video") == 0 ) {
 116                                 if( !gsVT_OutputDevice )
 117                                         gsVT_OutputDevice = strdup(val);
 118                         }
 119                         else if( strcmp(opt, "Input") == 0 ) {
 120                                 if( !gsVT_InputDevice )
 121                                         gsVT_InputDevice = strdup(val);
 122                         }
 123                         else if( strcmp(opt, "Width") == 0 ) {
 124                                 giVT_RealWidth = atoi( val );
 125                         }
 126                         else if( strcmp(opt, "Height") == 0 ) {
 127                                 giVT_RealHeight = atoi( val );
 128                         }
 129                         else if( strcmp(opt, "Scrollback") == 0 ) {
 130                                 giVT_Scrollback = atoi( val );
 131                         }
 132                 }
 133         }
 134
 135         // Apply Defaults
 136         if(!gsVT_OutputDevice)  gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
 137         else if( Module_EnsureLoaded( gsVT_OutputDevice ) )     gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
 138         if( Module_EnsureLoaded( gsVT_OutputDevice ) )  gsVT_OutputDevice = (char*)FALLBACK_OUTPUT;
 139         if( Module_EnsureLoaded( gsVT_OutputDevice ) ) {
 140                 Log_Error("VTerm", "Fallback video '%s' is not avaliable, giving up", FALLBACK_OUTPUT);
 141                 return MODULE_ERR_MISC;
 142         }
 143
 144         if(!gsVT_InputDevice)   gsVT_InputDevice = (char*)DEFAULT_INPUT;
 145         else if( Module_EnsureLoaded( gsVT_InputDevice ) )      gsVT_InputDevice = (char*)DEFAULT_INPUT;
 146         if( Module_EnsureLoaded( gsVT_InputDevice ) ) {
 147                 Log_Error("VTerm", "Fallback input '%s' is not avaliable, input will not be avaliable", DEFAULT_INPUT);
 148         }
 149
 150         // Create device paths
 151         {
 152                 char    *tmp;
 153                 tmp = malloc( 9 + strlen(gsVT_OutputDevice) + 1 );
 154                 strcpy(tmp, "/Devices/");
 155                 strcpy(&tmp[9], gsVT_OutputDevice);
 156                 gsVT_OutputDevice = tmp;
 157
 158                 tmp = malloc( 9 + strlen(gsVT_InputDevice) + 1 );
 159                 strcpy(tmp, "/Devices/");
 160                 strcpy(&tmp[9], gsVT_InputDevice);
 161                 gsVT_InputDevice = tmp;
 162         }
 163
 164         Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
 165         Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
 166
 167         VT_InitOutput();
 168         VT_InitInput();
 169
 170
 171         // Create Nodes
 172         Log_Debug("VTerm", "Initialising nodes (and creating buffers)");
 173         for( i = 0; i < NUM_VTS; i++ )
 174         {
 175                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 176                 gVT_Terminals[i].Flags = 0;
 177 //              gVT_Terminals[i].Flags = VT_FLAG_HIDECSR;       //HACK - Stop all those memcpy calls
 178                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 179                 gVT_Terminals[i].WritePos = 0;
 180                 gVT_Terminals[i].AltWritePos = 0;
 181                 gVT_Terminals[i].ViewPos = 0;
 182                 gVT_Terminals[i].ReadingThread = -1;
 183                 gVT_Terminals[i].ScrollHeight = 0;
 184
 185                 // Initialise
 186                 VT_int_ChangeMode( &gVT_Terminals[i],
 187                         TERM_MODE_TEXT, giVT_RealWidth, giVT_RealHeight );
 188
 189                 gVT_Terminals[i].Name[0] = '0'+i;
 190                 gVT_Terminals[i].Name[1] = '\0';
 191                 gVT_Terminals[i].Node.Inode = i;
 192                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 193                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 194
 195                 gVT_Terminals[i].Node.Type = &gVT_TermNodeType;
 196 //              Semaphore_Init(&gVT_Terminals[i].InputSemaphore, 0, MAX_INPUT_CHARS8, "VTerm", gVT_Terminals[i].Name);
 197         }
 198
 199         Log_Debug("VTerm", "Registering with DevFS");
 200         // Add to DevFS
 201         DevFS_AddDevice( &gVT_DrvInfo );
 202
 203         // Set kernel output to VT0
 204         Log_Debug("VTerm", "Setting kernel output to VT#0");
 205         Debug_SetKTerminal("/Devices/VTerm/0");
 206
 207         return MODULE_ERR_OK;
 208 }
 209
 210 /**
 211  * \brief Set the video resolution
 212  * \param Width New screen width
 213  * \param Height        New screen height
 214  */
 215 void VT_SetResolution(int Width, int Height)
 216 {
 217         tVideo_IOCtl_Mode       mode = {0};
 218          int    tmp;
 219          int    i;
 220
 221         // Create the video mode
 222         mode.width = Width;
 223         mode.height = Height;
 224         mode.bpp = 32;
 225         mode.flags = 0;
 226
 227         // Set video mode
 228         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 229         tmp = mode.id;
 230         if( Width != mode.width || Height != mode.height )
 231         {
 232                 Log_Warning("VTerm",
 233                         "Selected resolution (%ix%i) is not supported by the device, using (%ix%i)",
 234                         giVT_RealWidth, giVT_RealHeight,
 235                         mode.width, mode.height
 236                         );
 237                 giVT_RealWidth = mode.width;
 238                 giVT_RealHeight = mode.height;
 239         }
 240         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 241
 242         // Resize text terminals if needed
 243         if( gVT_Terminals[0].Text && (giVT_RealWidth != mode.width || giVT_RealHeight != mode.height) )
 244         {
 245                  int    newBufSize = (giVT_RealWidth/giVT_CharWidth)
 246                                         *(giVT_RealHeight/giVT_CharHeight)
 247                                         *(giVT_Scrollback+1);
 248                 //tVT_Char      *tmp;
 249                 // Resize the text terminals
 250                 Log_Debug("VTerm", "Resizing terminals to %ix%i",
 251                         giVT_RealWidth/giVT_CharWidth, giVT_RealHeight/giVT_CharHeight);
 252                 for( i = 0; i < NUM_VTS; i ++ )
 253                 {
 254                         if( gVT_Terminals[i].Mode != TERM_MODE_TEXT )   continue;
 255
 256                         gVT_Terminals[i].TextWidth = giVT_RealWidth/giVT_CharWidth;
 257                         gVT_Terminals[i].TextHeight = giVT_RealHeight/giVT_CharHeight;
 258                         gVT_Terminals[i].ScrollHeight = gVT_Terminals[i].TextHeight;
 259
 260                         gVT_Terminals[i].Text = realloc(
 261                                 gVT_Terminals[i].Text,
 262                                 newBufSize*sizeof(tVT_Char)
 263                                 );
 264                 }
 265         }
 266 }
 267
 268 /**
 269  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 270  * \brief Read from the VTerm Directory
 271  */
 272 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 273 {
 274         if(Pos < 0)     return NULL;
 275         if(Pos >= NUM_VTS)      return NULL;
 276         return strdup( gVT_Terminals[Pos].Name );
 277 }
 278
 279 /**
 280  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 281  * \brief Find an item in the VTerm directory
 282  * \param Node  Root node
 283  * \param Name  Name (number) of the terminal
 284  */
 285 tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 286 {
 287          int    num;
 288
 289         ENTER("pNode sName", Node, Name);
 290
 291         // Open the input and output files if needed
 292         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 293         if(giVT_InputDevHandle == -2)   VT_InitInput();
 294
 295         // Sanity check name
 296         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 297                 LEAVE('n');
 298                 return NULL;
 299         }
 300         // Get index
 301         num = Name[0] - '0';
 302         if(num >= NUM_VTS) {
 303                 LEAVE('n');
 304                 return NULL;
 305         }
 306         // Return node
 307         LEAVE('p', &gVT_Terminals[num].Node);
 308         return &gVT_Terminals[num].Node;
 309 }
 310
 311 /**
 312  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 313  * \brief Control the VTerm Driver
 314  */
 315 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 316 {
 317          int    len;
 318         switch(Id)
 319         {
 320         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 321         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 322         case DRV_IOCTL_VERSION: return VERSION;
 323         case DRV_IOCTL_LOOKUP:  return 0;
 324
 325         case 4: // Get Video Driver
 326                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 327                 return strlen(gsVT_OutputDevice);
 328
 329         case 5: // Set Video Driver
 330                 if(!Data)       return -EINVAL;
 331                 if(Threads_GetUID() != 0)       return -EACCES;
 332
 333                 len = strlen(Data);
 334
 335                 // TODO: Check if the string used is a heap string
 336
 337                 free(gsVT_OutputDevice);
 338
 339                 gsVT_OutputDevice = malloc(len+1);
 340                 strcpy(gsVT_OutputDevice, Data);
 341
 342                 VFS_Close(giVT_OutputDevHandle);
 343                 giVT_OutputDevHandle = -1;
 344
 345                 VT_InitOutput();
 346                 return 1;
 347         }
 348         return 0;
 349 }
 350
 351 /**
 352  * \brief Read from a virtual terminal
 353  */
 354 size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
 355 {
 356          int    pos, avail;
 357         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 358         Uint32  *codepoint_buf = Buffer;
 359         Uint32  *codepoint_in;
 360
 361         Mutex_Acquire( &term->ReadingLock );
 362
 363         // Check current mode
 364         switch(term->Mode)
 365         {
 366         // Text Mode (UTF-8)
 367         case TERM_MODE_TEXT:
 368                 VT_int_UpdateCursor(term, 1);
 369
 370                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UTF-8)");
 371
 372                 avail = term->InputWrite - term->InputRead;
 373                 if(avail < 0)
 374                         avail += MAX_INPUT_CHARS8;
 375                 if(avail > Length)
 376                         avail = Length;
 377
 378                 pos = 0;
 379                 while( avail -- )
 380                 {
 381                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 382                         pos ++;
 383                         term->InputRead ++;
 384                         while(term->InputRead >= MAX_INPUT_CHARS8)
 385                                 term->InputRead -= MAX_INPUT_CHARS8;
 386                 }
 387                 break;
 388
 389         //case TERM_MODE_FB:
 390         // Other - UCS-4
 391         default:
 392                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UCS-4)");
 393
 394                 avail = term->InputWrite - term->InputRead;
 395                 if(avail < 0)
 396                         avail += MAX_INPUT_CHARS32;
 397                 Length /= 4;
 398                 if(avail > Length)
 399                         avail = Length;
 400
 401                 codepoint_in = (void*)term->InputBuffer;
 402                 codepoint_buf = Buffer;
 403
 404                 pos = 0;
 405                 while( avail -- )
 406                 {
 407                         codepoint_buf[pos] = codepoint_in[term->InputRead];
 408                         pos ++;
 409                         term->InputRead ++;
 410                         while(term->InputRead >= MAX_INPUT_CHARS32)
 411                                 term->InputRead -= MAX_INPUT_CHARS32;
 412                 }
 413                 pos *= 4;
 414                 break;
 415         }
 416
 417         // Mark none avaliable if buffer empty
 418         if( term->InputRead == term->InputWrite )
 419                 VFS_MarkAvaliable(&term->Node, 0);
 420
 421         term->ReadingThread = -1;
 422
 423 //      VT_int_UpdateCursor(term, term->Mode == TERM_MODE_TEXT);
 424
 425         Mutex_Release( &term->ReadingLock );
 426
 427         return pos;
 428 }
 429
 430 /**
 431  * \brief Write to a virtual terminal
 432  */
 433 size_t VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer)
 434 {
 435         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 436          int    size;
 437
 438         // Write
 439         switch( term->Mode )
 440         {
 441         // Print Text
 442         case TERM_MODE_TEXT:
 443                 VT_int_PutString(term, Buffer, Length);
 444                 break;
 445
 446         // Framebuffer :)
 447         case TERM_MODE_FB:
 448                 // - Sanity Checking
 449                 size = term->Width*term->Height*4;
 450                 if( Offset > size ) {
 451                         Log_Notice("VTerm", "VT_Write: Offset (0x%llx) > FBSize (0x%x)",
 452                                 Offset, size);
 453                         return 0;
 454                 }
 455                 if( Offset + Length > size ) {
 456                         Log_Notice("VTerm", "VT_Write: Offset+Length (0x%llx) > FBSize (0x%x)",
 457                                 Offset+Length, size);
 458                         Length = size - Offset;
 459                 }
 460
 461                 // Update screen if needed
 462                 if( Node->Inode == giVT_CurrentTerminal )
 463                 {
 464                         if( giVT_RealHeight > term->Height )
 465                                 Offset += (giVT_RealHeight - term->Height) / 2 * term->Width * 4;
 466                         // Handle undersized virtual terminals
 467                         if( giVT_RealWidth > term->Width )
 468                         {
 469                                 // No? :( Well, just center it
 470                                  int    x, y, w, h;
 471                                 Uint    dst_ofs;
 472                                 // TODO: Fix to handle the final line correctly?
 473                                 x = Offset/4;   y = x / term->Width;    x %= term->Width;
 474                                 w = Length/4+x; h = w / term->Width;    w %= term->Width;
 475
 476                                 // Center
 477                                 x += (giVT_RealWidth - term->Width) / 2;
 478                                 dst_ofs = (x + y * giVT_RealWidth) * 4;
 479                                 while(h--)
 480                                 {
 481                                         VFS_WriteAt( giVT_OutputDevHandle,
 482                                                 dst_ofs,
 483                                                 term->Width * 4,
 484                                                 Buffer
 485                                                 );
 486                                         Buffer = (void*)( (Uint)Buffer + term->Width*4 );
 487                                         dst_ofs += giVT_RealWidth * 4;
 488                                 }
 489                                 return 0;
 490                         }
 491                         else
 492                         {
 493                                 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 494                         }
 495                 }
 496                 else
 497                 {
 498                         if( !term->Buffer )
 499                                 term->Buffer = malloc( term->Width * term->Height * 4 );
 500                         // Copy to the local cache
 501                         memcpy( (char*)term->Buffer + (Uint)Offset, Buffer, Length );
 502                 }
 503                 break;
 504         // Just pass on (for now)
 505         // TODO: Handle locally too to ensure no information is lost on
 506         //       VT Switch (and to isolate terminals from each other)
 507         case TERM_MODE_2DACCEL:
 508         //case TERM_MODE_3DACCEL:
 509                 if( Node->Inode == giVT_CurrentTerminal )
 510                 {
 511                         VFS_Write( giVT_OutputDevHandle, Length, Buffer );
 512                 }
 513                 break;
 514         }
 515
 516         return 0;
 517 }
 518
 519 /**
 520  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 521  * \brief Call an IO Control on a virtual terminal
 522  */
 523 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 524 {
 525          int    *iData = Data;
 526          int    ret;
 527         tVTerm  *term = Node->ImplPtr;
 528         ENTER("pNode iId pData", Node, Id, Data);
 529
 530         if(Id >= DRV_IOCTL_LOOKUP) {
 531                 // Only root can fiddle with graphics modes
 532                 // TODO: Remove this and replace with user ownership
 533                 if( Threads_GetUID() != 0 )     return -1;
 534         }
 535
 536         switch(Id)
 537         {
 538         // --- Core Defined
 539         case DRV_IOCTL_TYPE:
 540                 LEAVE('i', DRV_TYPE_TERMINAL);
 541                 return DRV_TYPE_TERMINAL;
 542         case DRV_IOCTL_IDENT:
 543                 memcpy(Data, "VT\0\0", 4);
 544                 LEAVE('i', 0);
 545                 return 0;
 546         case DRV_IOCTL_VERSION:
 547                 LEAVE('x', VERSION);
 548                 return VERSION;
 549         case DRV_IOCTL_LOOKUP:
 550                 LEAVE('i', 0);
 551                 return 0;
 552
 553         // Get/Set the mode (and apply any changes)
 554         case TERM_IOCTL_MODETYPE:
 555                 if(Data != NULL)
 556                 {
 557                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 558                                 LEAVE('i', -1);
 559                                 return -1;
 560                         }
 561                         Log_Log("VTerm", "VTerm %i mode set to %i", (int)Node->Inode, *iData);
 562
 563                         // Update mode if needed
 564                         if( term->Mode != *iData || term->NewWidth || term->NewHeight)
 565                         {
 566                                 // Adjust for text mode
 567                                 if( *iData == TERM_MODE_TEXT ) {
 568                                         term->NewHeight *= giVT_CharHeight;
 569                                         term->NewWidth *= giVT_CharWidth;
 570                                 }
 571                                 // Fill unchanged dimensions
 572                                 if(term->NewHeight == 0)        term->NewHeight = term->Height;
 573                                 if(term->NewWidth == 0) term->NewWidth = term->Width;
 574                                 // Set new mode
 575                                 VT_int_ChangeMode(term, *iData, term->NewWidth, term->NewHeight);
 576                                 // Clear unapplied dimensions
 577                                 term->NewWidth = 0;
 578                                 term->NewHeight = 0;
 579                         }
 580
 581                         // Update the screen dimensions
 582                         if(Node->Inode == giVT_CurrentTerminal)
 583                                 VT_SetTerminal( giVT_CurrentTerminal );
 584                 }
 585                 LEAVE('i', term->Mode);
 586                 return term->Mode;
 587
 588         // Get/set the terminal width
 589         case TERM_IOCTL_WIDTH:
 590                 if(Data != NULL) {
 591                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 592                                 LEAVE('i', -1);
 593                                 return -1;
 594                         }
 595                         term->NewWidth = *iData;
 596                 }
 597                 if( term->NewWidth )
 598                         ret = term->NewWidth;
 599                 else if( term->Mode == TERM_MODE_TEXT )
 600                         ret = term->TextWidth;
 601                 else
 602                         ret = term->Width;
 603                 LEAVE('i', ret);
 604                 return ret;
 605
 606         // Get/set the terminal height
 607         case TERM_IOCTL_HEIGHT:
 608                 if(Data != NULL) {
 609                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 610                                 LEAVE('i', -1);
 611                                 return -1;
 612                         }
 613                         term->NewHeight = *iData;
 614                 }
 615                 if( term->NewHeight )
 616                         ret = term->NewHeight;
 617                 else if( term->Mode == TERM_MODE_TEXT )
 618                         ret = term->TextHeight;
 619                 else
 620                         ret = term->Height;
 621                 LEAVE('i', ret);
 622                 return ret;
 623
 624         case TERM_IOCTL_FORCESHOW:
 625                 Log_Log("VTerm", "Thread %i forced VTerm %i to be shown",
 626                         Threads_GetTID(), (int)Node->Inode);
 627                 VT_SetTerminal( Node->Inode );
 628                 LEAVE('i', 1);
 629                 return 1;
 630
 631         case TERM_IOCTL_GETSETCURSOR:
 632                 if(Data != NULL)
 633                 {
 634                         tVideo_IOCtl_Pos        *pos = Data;
 635                         if( !CheckMem(Data, sizeof(*pos)) ) {
 636                                 errno = -EINVAL;
 637                                 LEAVE('i', -1);
 638                                 return -1;
 639                         }
 640
 641                         if( term->Mode == TERM_MODE_TEXT )
 642                         {
 643                                 if(term->Flags & VT_FLAG_ALTBUF)
 644                                         term->AltWritePos = pos->x + pos->y * term->TextWidth;
 645                                 else
 646                                         term->WritePos = pos->x + pos->y * term->TextWidth + term->ViewPos;
 647                                 VT_int_UpdateCursor(term, 0);
 648                         }
 649                         else
 650                         {
 651                                 term->VideoCursorX = pos->x;
 652                                 term->VideoCursorY = pos->y;
 653                                 VT_int_UpdateCursor(term, 1);
 654                         }
 655                 }
 656                 ret = (term->Flags & VT_FLAG_ALTBUF) ? term->AltWritePos : term->WritePos-term->ViewPos;
 657                 LEAVE('i', ret);
 658                 return ret;
 659
 660         case TERM_IOCTL_SETCURSORBITMAP: {
 661                 tVideo_IOCtl_Bitmap     *bmp = Data;
 662                 if( Data == NULL )
 663                 {
 664                         free( term->VideoCursor );
 665                         term->VideoCursor = NULL;
 666                         LEAVE('i', 0);
 667                         return 0;
 668                 }
 669
 670                 // Sanity check bitmap
 671                 if( !CheckMem(bmp, sizeof(tVideo_IOCtl_Bitmap)) ) {
 672                         Log_Notice("VTerm", "%p in TERM_IOCTL_SETCURSORBITMAP invalid", bmp);
 673                         errno = -EINVAL;
 674                         LEAVE_RET('i', -1);
 675                 }
 676                 if( !CheckMem(bmp->Data, bmp->W*bmp->H*sizeof(Uint32)) ) {
 677                         Log_Notice("VTerm", "%p in TERM_IOCTL_SETCURSORBITMAP invalid", bmp);
 678                         errno = -EINVAL;
 679                         LEAVE_RET('i', -1);
 680                 }
 681
 682                 // Reallocate if needed
 683                 if(term->VideoCursor)
 684                 {
 685                         if(bmp->W * bmp->H != term->VideoCursor->W * term->VideoCursor->H) {
 686                                 free(term->VideoCursor);
 687                                 term->VideoCursor = NULL;
 688                         }
 689                 }
 690                 if(!term->VideoCursor) {
 691                         term->VideoCursor = malloc(sizeof(tVideo_IOCtl_Pos) + bmp->W*bmp->H*sizeof(Uint32));
 692                         if(!term->VideoCursor) {
 693                                 Log_Error("VTerm", "Unable to allocate memory for cursor");
 694                                 errno = -ENOMEM;
 695                                 LEAVE_RET('i', -1);
 696                         }
 697                 }
 698
 699                 memcpy(term->VideoCursor, bmp, sizeof(tVideo_IOCtl_Pos) + bmp->W*bmp->H*sizeof(Uint32));
 700
 701                 Log_Debug("VTerm", "Set VT%i's cursor to %p %ix%i",
 702                         (int)term->Node.Inode, bmp, bmp->W, bmp->H);
 703
 704                 if(gpVT_CurTerm == term)
 705                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSORBITMAP, term->VideoCursor);
 706
 707                 LEAVE('i', 0);
 708                 return 0; }
 709         }
 710         LEAVE('i', -1);
 711         return -1;
 712 }
 713
 714 void VT_Terminal_Reference(tVFS_Node *Node)
 715 {
 716         // Append PID to list
 717 }
 718
 719 void VT_Terminal_Close(tVFS_Node *Node)
 720 {
 721         // Remove PID from list
 722 }
 723
 724 /**
 725  * \fn void VT_SetTerminal(int ID)
 726  * \brief Set the current terminal
 727  */
 728 void VT_SetTerminal(int ID)
 729 {
 730         // Copy the screen state
 731         if( ID != giVT_CurrentTerminal && gpVT_CurTerm->Mode != TERM_MODE_TEXT )
 732         {
 733                 if( !gpVT_CurTerm->Buffer )
 734                         gpVT_CurTerm->Buffer = malloc( gpVT_CurTerm->Width*gpVT_CurTerm->Height*4 );
 735                 if( gpVT_CurTerm->Width < giVT_RealWidth )
 736                 {
 737                          int    line;
 738                         Uint    ofs = 0;
 739                         Uint32  *dest = gpVT_CurTerm->Buffer;
 740                         // Slower scanline copy
 741                         for( line = 0; line < gpVT_CurTerm->Height; line ++ )
 742                         {
 743                                 VFS_ReadAt(giVT_OutputDevHandle, ofs, gpVT_CurTerm->Width*4, dest);
 744                                 ofs += giVT_RealWidth * 4;
 745                                 dest += gpVT_CurTerm->Width;
 746                         }
 747                 }
 748                 else
 749                 {
 750                         VFS_ReadAt(giVT_OutputDevHandle,
 751                                 0, gpVT_CurTerm->Height*giVT_RealWidth*4,
 752                                 gpVT_CurTerm->Buffer
 753                                 );
 754                 }
 755         }
 756
 757         // Update current terminal ID
 758         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 759         giVT_CurrentTerminal = ID;
 760         gpVT_CurTerm = &gVT_Terminals[ID];
 761
 762         LOG("Attempting VT_SetMode");
 763
 764         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 765         {
 766                 VT_SetMode( VIDEO_BUFFMT_TEXT );
 767         }
 768         else
 769         {
 770                 // Update the cursor image
 771                 if(gpVT_CurTerm->VideoCursor)
 772                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSORBITMAP, gpVT_CurTerm->VideoCursor);
 773                 VT_SetMode( VIDEO_BUFFMT_FRAMEBUFFER );
 774         }
 775
 776         LOG("Mode set");
 777
 778         if(gpVT_CurTerm->Buffer)
 779         {
 780                 // TODO: Handle non equal sized
 781                 VFS_WriteAt(
 782                         giVT_OutputDevHandle,
 783                         0,
 784                         gpVT_CurTerm->Width*gpVT_CurTerm->Height*sizeof(Uint32),
 785                         gpVT_CurTerm->Buffer
 786                         );
 787                 LOG("Updated screen contents");
 788         }
 789
 790         VT_int_UpdateCursor(gpVT_CurTerm, 1);
 791         // Update the screen
 792         VT_int_UpdateScreen(gpVT_CurTerm, 1);
 793         LOG("done");
 794 }