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  int    VT_ReadDir(tVFS_Node *Node, int Pos, char Dest[FILENAME_MAX]);
  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 = val;
 118                         }
 119                         else if( strcmp(opt, "Input") == 0 ) {
 120                                 if( !gsVT_InputDevice )
 121                                         gsVT_InputDevice = 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                         else {
 133                                 Log_Notice("VTerm", "Unknown option '%s'", opt);
 134                         }
 135                 }
 136         }
 137
 138         // Apply Defaults
 139         if(!gsVT_OutputDevice)  gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
 140         else if( Module_EnsureLoaded( gsVT_OutputDevice ) )     gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
 141         if( Module_EnsureLoaded( gsVT_OutputDevice ) )  gsVT_OutputDevice = (char*)FALLBACK_OUTPUT;
 142         if( Module_EnsureLoaded( gsVT_OutputDevice ) ) {
 143                 Log_Error("VTerm", "Fallback video '%s' is not avaliable, giving up", FALLBACK_OUTPUT);
 144                 return MODULE_ERR_MISC;
 145         }
 146
 147         if(!gsVT_InputDevice)   gsVT_InputDevice = (char*)DEFAULT_INPUT;
 148         else if( Module_EnsureLoaded( gsVT_InputDevice ) )      gsVT_InputDevice = (char*)DEFAULT_INPUT;
 149         if( Module_EnsureLoaded( gsVT_InputDevice ) ) {
 150                 Log_Error("VTerm", "Fallback input '%s' is not avaliable, input will not be avaliable", DEFAULT_INPUT);
 151         }
 152
 153         // Create device paths
 154         {
 155                 char    *tmp;
 156                 tmp = malloc( 9 + strlen(gsVT_OutputDevice) + 1 );
 157                 strcpy(tmp, "/Devices/");
 158                 strcpy(&tmp[9], gsVT_OutputDevice);
 159                 gsVT_OutputDevice = tmp;
 160
 161                 tmp = malloc( 9 + strlen(gsVT_InputDevice) + 1 );
 162                 strcpy(tmp, "/Devices/");
 163                 strcpy(&tmp[9], gsVT_InputDevice);
 164                 gsVT_InputDevice = tmp;
 165         }
 166
 167         Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
 168         Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
 169
 170         VT_InitOutput();
 171         VT_InitInput();
 172
 173
 174         // Create Nodes
 175         Log_Debug("VTerm", "Initialising nodes (and creating buffers)");
 176         for( i = 0; i < NUM_VTS; i++ )
 177         {
 178                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 179                 gVT_Terminals[i].Flags = 0;
 180 //              gVT_Terminals[i].Flags = VT_FLAG_HIDECSR;       //HACK - Stop all those memcpy calls
 181                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 182                 gVT_Terminals[i].WritePos = 0;
 183                 gVT_Terminals[i].AltWritePos = 0;
 184                 gVT_Terminals[i].ViewPos = 0;
 185                 gVT_Terminals[i].ReadingThread = -1;
 186                 gVT_Terminals[i].ScrollHeight = 0;
 187
 188                 // Initialise
 189                 VT_int_ChangeMode( &gVT_Terminals[i],
 190                         TERM_MODE_TEXT, giVT_RealWidth, giVT_RealHeight );
 191
 192                 gVT_Terminals[i].Name[0] = '0'+i;
 193                 gVT_Terminals[i].Name[1] = '\0';
 194                 gVT_Terminals[i].Node.Inode = i;
 195                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 196                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 197
 198                 gVT_Terminals[i].Node.Type = &gVT_TermNodeType;
 199 //              Semaphore_Init(&gVT_Terminals[i].InputSemaphore, 0, MAX_INPUT_CHARS8, "VTerm", gVT_Terminals[i].Name);
 200         }
 201
 202         // Add to DevFS
 203         DevFS_AddDevice( &gVT_DrvInfo );
 204
 205         // Set kernel output to VT0
 206         Log_Debug("VTerm", "Setting kernel output to VT#0");
 207         Debug_SetKTerminal("/Devices/VTerm/0");
 208
 209         return MODULE_ERR_OK;
 210 }
 211
 212 /**
 213  * \brief Set the video resolution
 214  * \param Width New screen width
 215  * \param Height        New screen height
 216  */
 217 void VT_SetResolution(int Width, int Height)
 218 {
 219         tVideo_IOCtl_Mode       mode = {0};
 220          int    tmp;
 221          int    i;
 222
 223         // Create the video mode
 224         mode.width = Width;
 225         mode.height = Height;
 226         mode.bpp = 32;
 227         mode.flags = 0;
 228
 229         // Set video mode
 230         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 231         tmp = mode.id;
 232         if( Width != mode.width || Height != mode.height )
 233         {
 234                 Log_Warning("VTerm",
 235                         "Selected resolution (%ix%i) is not supported by the device, using (%ix%i)",
 236                         giVT_RealWidth, giVT_RealHeight,
 237                         mode.width, mode.height
 238                         );
 239                 giVT_RealWidth = mode.width;
 240                 giVT_RealHeight = mode.height;
 241         }
 242         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 243
 244         // Resize text terminals if needed
 245         if( gVT_Terminals[0].Text && (giVT_RealWidth != mode.width || giVT_RealHeight != mode.height) )
 246         {
 247                  int    newBufSize = (giVT_RealWidth/giVT_CharWidth)
 248                                         *(giVT_RealHeight/giVT_CharHeight)
 249                                         *(giVT_Scrollback+1);
 250                 //tVT_Char      *tmp;
 251                 // Resize the text terminals
 252                 Log_Debug("VTerm", "Resizing terminals to %ix%i",
 253                         giVT_RealWidth/giVT_CharWidth, giVT_RealHeight/giVT_CharHeight);
 254                 for( i = 0; i < NUM_VTS; i ++ )
 255                 {
 256                         if( gVT_Terminals[i].Mode != TERM_MODE_TEXT )   continue;
 257
 258                         gVT_Terminals[i].TextWidth = giVT_RealWidth/giVT_CharWidth;
 259                         gVT_Terminals[i].TextHeight = giVT_RealHeight/giVT_CharHeight;
 260                         gVT_Terminals[i].ScrollHeight = gVT_Terminals[i].TextHeight;
 261
 262                         gVT_Terminals[i].Text = realloc(
 263                                 gVT_Terminals[i].Text,
 264                                 newBufSize*sizeof(tVT_Char)
 265                                 );
 266                 }
 267         }
 268 }
 269
 270 /**
 271  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 272  * \brief Read from the VTerm Directory
 273  */
 274 int VT_ReadDir(tVFS_Node *Node, int Pos, char Dest[FILENAME_MAX])
 275 {
 276         if(Pos < 0)     return -EINVAL;
 277         if(Pos >= NUM_VTS)      return -EINVAL;
 278         strncpy(Dest, gVT_Terminals[Pos].Name, FILENAME_MAX);
 279         return 0;
 280 }
 281
 282 /**
 283  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 284  * \brief Find an item in the VTerm directory
 285  * \param Node  Root node
 286  * \param Name  Name (number) of the terminal
 287  */
 288 tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 289 {
 290          int    num;
 291
 292         ENTER("pNode sName", Node, Name);
 293
 294         // Open the input and output files if needed
 295         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 296         if(giVT_InputDevHandle == -2)   VT_InitInput();
 297
 298         // Sanity check name
 299         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 300                 LEAVE('n');
 301                 return NULL;
 302         }
 303         // Get index
 304         num = Name[0] - '0';
 305         if(num >= NUM_VTS) {
 306                 LEAVE('n');
 307                 return NULL;
 308         }
 309         // Return node
 310         LEAVE('p', &gVT_Terminals[num].Node);
 311         return &gVT_Terminals[num].Node;
 312 }
 313
 314 /**
 315  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 316  * \brief Control the VTerm Driver
 317  */
 318 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 319 {
 320          int    len;
 321         switch(Id)
 322         {
 323         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 324         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 325         case DRV_IOCTL_VERSION: return VERSION;
 326         case DRV_IOCTL_LOOKUP:  return 0;
 327
 328         case 4: // Get Video Driver
 329                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 330                 return strlen(gsVT_OutputDevice);
 331
 332         case 5: // Set Video Driver
 333                 if(!Data)       return -EINVAL;
 334                 if(Threads_GetUID() != 0)       return -EACCES;
 335
 336                 len = strlen(Data);
 337
 338                 // TODO: Check if the string used is a heap string
 339
 340                 free(gsVT_OutputDevice);
 341
 342                 gsVT_OutputDevice = malloc(len+1);
 343                 strcpy(gsVT_OutputDevice, Data);
 344
 345                 VFS_Close(giVT_OutputDevHandle);
 346                 giVT_OutputDevHandle = -1;
 347
 348                 VT_InitOutput();
 349                 return 1;
 350         }
 351         return 0;
 352 }
 353
 354 /**
 355  * \brief Read from a virtual terminal
 356  */
 357 size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
 358 {
 359          int    pos, avail;
 360         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 361         Uint32  *codepoint_buf = Buffer;
 362         Uint32  *codepoint_in;
 363
 364         Mutex_Acquire( &term->ReadingLock );
 365
 366         // Check current mode
 367         switch(term->Mode)
 368         {
 369         // Text Mode (UTF-8)
 370         case TERM_MODE_TEXT:
 371                 VT_int_UpdateCursor(term, 1);
 372
 373                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UTF-8)");
 374
 375                 avail = term->InputWrite - term->InputRead;
 376                 if(avail < 0)
 377                         avail += MAX_INPUT_CHARS8;
 378                 if(avail > Length)
 379                         avail = Length;
 380
 381                 pos = 0;
 382                 while( avail -- )
 383                 {
 384                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 385                         pos ++;
 386                         term->InputRead ++;
 387                         while(term->InputRead >= MAX_INPUT_CHARS8)
 388                                 term->InputRead -= MAX_INPUT_CHARS8;
 389                 }
 390                 break;
 391
 392         //case TERM_MODE_FB:
 393         // Other - UCS-4
 394         default:
 395                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UCS-4)");
 396
 397                 avail = term->InputWrite - term->InputRead;
 398                 if(avail < 0)
 399                         avail += MAX_INPUT_CHARS32;
 400                 Length /= 4;
 401                 if(avail > Length)
 402                         avail = Length;
 403
 404                 codepoint_in = (void*)term->InputBuffer;
 405                 codepoint_buf = Buffer;
 406
 407                 pos = 0;
 408                 while( avail -- )
 409                 {
 410                         codepoint_buf[pos] = codepoint_in[term->InputRead];
 411                         pos ++;
 412                         term->InputRead ++;
 413                         while(term->InputRead >= MAX_INPUT_CHARS32)
 414                                 term->InputRead -= MAX_INPUT_CHARS32;
 415                 }
 416                 pos *= 4;
 417                 break;
 418         }
 419
 420         // Mark none avaliable if buffer empty
 421         if( term->InputRead == term->InputWrite )
 422                 VFS_MarkAvaliable(&term->Node, 0);
 423
 424         term->ReadingThread = -1;
 425
 426 //      VT_int_UpdateCursor(term, term->Mode == TERM_MODE_TEXT);
 427
 428         Mutex_Release( &term->ReadingLock );
 429
 430         return pos;
 431 }
 432
 433 /**
 434  * \brief Write to a virtual terminal
 435  */
 436 size_t VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer)
 437 {
 438         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 439          int    size;
 440
 441         // Write
 442         switch( term->Mode )
 443         {
 444         // Print Text
 445         case TERM_MODE_TEXT:
 446                 VT_int_PutString(term, Buffer, Length);
 447                 break;
 448
 449         // Framebuffer :)
 450         case TERM_MODE_FB:
 451                 // - Sanity Checking
 452                 size = term->Width*term->Height*4;
 453                 if( Offset > size ) {
 454                         Log_Notice("VTerm", "VT_Write: %i Offset (0x%llx) > FBSize (0x%x)",
 455                                 (int)Node->Inode, Offset, size);
 456                         return 0;
 457                 }
 458                 if( Offset + Length > size ) {
 459                         Log_Notice("VTerm", "VT_Write: Offset+Length (0x%llx) > FBSize (0x%x)",
 460                                 Offset+Length, size);
 461                         Length = size - Offset;
 462                 }
 463
 464                 // Update screen if needed
 465                 if( Node->Inode == giVT_CurrentTerminal )
 466                 {
 467                         if( giVT_RealHeight > term->Height )
 468                                 Offset += (giVT_RealHeight - term->Height) / 2 * term->Width * 4;
 469                         // Handle undersized virtual terminals
 470                         if( giVT_RealWidth > term->Width )
 471                         {
 472                                 // No? :( Well, just center it
 473                                  int    x, y, w, h;
 474                                 Uint    dst_ofs;
 475                                 // TODO: Fix to handle the final line correctly?
 476                                 x = Offset/4;   y = x / term->Width;    x %= term->Width;
 477                                 w = Length/4+x; h = w / term->Width;    w %= term->Width;
 478
 479                                 // Center
 480                                 x += (giVT_RealWidth - term->Width) / 2;
 481                                 dst_ofs = (x + y * giVT_RealWidth) * 4;
 482                                 while(h--)
 483                                 {
 484                                         VFS_WriteAt( giVT_OutputDevHandle,
 485                                                 dst_ofs,
 486                                                 term->Width * 4,
 487                                                 Buffer
 488                                                 );
 489                                         Buffer = (void*)( (Uint)Buffer + term->Width*4 );
 490                                         dst_ofs += giVT_RealWidth * 4;
 491                                 }
 492                                 return 0;
 493                         }
 494                         else
 495                         {
 496                                 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 497                         }
 498                 }
 499                 else
 500                 {
 501                         if( !term->Buffer )
 502                                 term->Buffer = malloc( term->Width * term->Height * 4 );
 503                         // Copy to the local cache
 504                         memcpy( (char*)term->Buffer + (Uint)Offset, Buffer, Length );
 505                 }
 506                 break;
 507         // Just pass on (for now)
 508         // TODO: Handle locally too to ensure no information is lost on
 509         //       VT Switch (and to isolate terminals from each other)
 510         case TERM_MODE_2DACCEL:
 511         //case TERM_MODE_3DACCEL:
 512                 if( Node->Inode == giVT_CurrentTerminal )
 513                 {
 514                         VFS_Write( giVT_OutputDevHandle, Length, Buffer );
 515                 }
 516                 break;
 517         }
 518
 519         return Length;
 520 }
 521
 522 /**
 523  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 524  * \brief Call an IO Control on a virtual terminal
 525  */
 526 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 527 {
 528          int    *iData = Data;
 529          int    ret;
 530         tVTerm  *term = Node->ImplPtr;
 531         ENTER("pNode iId pData", Node, Id, Data);
 532
 533         if(Id >= DRV_IOCTL_LOOKUP) {
 534                 // Only root can fiddle with graphics modes
 535                 // TODO: Remove this and replace with user ownership
 536                 if( Threads_GetUID() != 0 )     return -1;
 537         }
 538
 539         switch(Id)
 540         {
 541         // --- Core Defined
 542         case DRV_IOCTL_TYPE:
 543                 LEAVE('i', DRV_TYPE_TERMINAL);
 544                 return DRV_TYPE_TERMINAL;
 545         case DRV_IOCTL_IDENT:
 546                 memcpy(Data, "VT\0\0", 4);
 547                 LEAVE('i', 0);
 548                 return 0;
 549         case DRV_IOCTL_VERSION:
 550                 LEAVE('x', VERSION);
 551                 return VERSION;
 552         case DRV_IOCTL_LOOKUP:
 553                 LEAVE('i', 0);
 554                 return 0;
 555
 556         // Get/Set the mode (and apply any changes)
 557         case TERM_IOCTL_MODETYPE:
 558                 if(Data != NULL)
 559                 {
 560                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 561                                 LEAVE('i', -1);
 562                                 return -1;
 563                         }
 564                         Log_Log("VTerm", "VTerm %i mode set to %i", (int)Node->Inode, *iData);
 565
 566                         // Update mode if needed
 567                         if( term->Mode != *iData || term->NewWidth || term->NewHeight)
 568                         {
 569                                 // Adjust for text mode
 570                                 if( *iData == TERM_MODE_TEXT ) {
 571                                         term->NewHeight *= giVT_CharHeight;
 572                                         term->NewWidth *= giVT_CharWidth;
 573                                 }
 574                                 // Fill unchanged dimensions
 575                                 if(term->NewHeight == 0)        term->NewHeight = term->Height;
 576                                 if(term->NewWidth == 0) term->NewWidth = term->Width;
 577                                 // Set new mode
 578                                 VT_int_ChangeMode(term, *iData, term->NewWidth, term->NewHeight);
 579                                 // Clear unapplied dimensions
 580                                 term->NewWidth = 0;
 581                                 term->NewHeight = 0;
 582                         }
 583
 584                         // Update the screen dimensions
 585                         if(Node->Inode == giVT_CurrentTerminal)
 586                                 VT_SetTerminal( giVT_CurrentTerminal );
 587                 }
 588                 LEAVE('i', term->Mode);
 589                 return term->Mode;
 590
 591         // Get/set the terminal width
 592         case TERM_IOCTL_WIDTH:
 593                 if(Data != NULL) {
 594                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 595                                 LEAVE('i', -1);
 596                                 return -1;
 597                         }
 598                         term->NewWidth = *iData;
 599                 }
 600                 if( term->NewWidth )
 601                         ret = term->NewWidth;
 602                 else if( term->Mode == TERM_MODE_TEXT )
 603                         ret = term->TextWidth;
 604                 else
 605                         ret = term->Width;
 606                 LEAVE('i', ret);
 607                 return ret;
 608
 609         // Get/set the terminal height
 610         case TERM_IOCTL_HEIGHT:
 611                 if(Data != NULL) {
 612                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 613                                 LEAVE('i', -1);
 614                                 return -1;
 615                         }
 616                         term->NewHeight = *iData;
 617                 }
 618                 if( term->NewHeight )
 619                         ret = term->NewHeight;
 620                 else if( term->Mode == TERM_MODE_TEXT )
 621                         ret = term->TextHeight;
 622                 else
 623                         ret = term->Height;
 624                 LEAVE('i', ret);
 625                 return ret;
 626
 627         case TERM_IOCTL_FORCESHOW:
 628                 Log_Log("VTerm", "Thread %i forced VTerm %i to be shown",
 629                         Threads_GetTID(), (int)Node->Inode);
 630                 VT_SetTerminal( Node->Inode );
 631                 LEAVE('i', 1);
 632                 return 1;
 633
 634         case TERM_IOCTL_GETSETCURSOR:
 635                 if(Data != NULL)
 636                 {
 637                         tVideo_IOCtl_Pos        *pos = Data;
 638                         if( !CheckMem(Data, sizeof(*pos)) ) {
 639                                 errno = -EINVAL;
 640                                 LEAVE('i', -1);
 641                                 return -1;
 642                         }
 643
 644                         if( term->Mode == TERM_MODE_TEXT )
 645                         {
 646                                 if(term->Flags & VT_FLAG_ALTBUF)
 647                                         term->AltWritePos = pos->x + pos->y * term->TextWidth;
 648                                 else
 649                                         term->WritePos = pos->x + pos->y * term->TextWidth + term->ViewPos;
 650                                 VT_int_UpdateCursor(term, 0);
 651                         }
 652                         else
 653                         {
 654                                 term->VideoCursorX = pos->x;
 655                                 term->VideoCursorY = pos->y;
 656                                 VT_int_UpdateCursor(term, 1);
 657                         }
 658                 }
 659                 ret = (term->Flags & VT_FLAG_ALTBUF) ? term->AltWritePos : term->WritePos-term->ViewPos;
 660                 LEAVE('i', ret);
 661                 return ret;
 662
 663         case TERM_IOCTL_SETCURSORBITMAP: {
 664                 tVideo_IOCtl_Bitmap     *bmp = Data;
 665                 if( Data == NULL )
 666                 {
 667                         free( term->VideoCursor );
 668                         term->VideoCursor = NULL;
 669                         LEAVE('i', 0);
 670                         return 0;
 671                 }
 672
 673                 // Sanity check bitmap
 674                 if( !CheckMem(bmp, sizeof(tVideo_IOCtl_Bitmap)) ) {
 675                         Log_Notice("VTerm", "%p in TERM_IOCTL_SETCURSORBITMAP invalid", bmp);
 676                         errno = -EINVAL;
 677                         LEAVE_RET('i', -1);
 678                 }
 679                 if( !CheckMem(bmp->Data, bmp->W*bmp->H*sizeof(Uint32)) ) {
 680                         Log_Notice("VTerm", "%p in TERM_IOCTL_SETCURSORBITMAP invalid", bmp);
 681                         errno = -EINVAL;
 682                         LEAVE_RET('i', -1);
 683                 }
 684
 685                 // Reallocate if needed
 686                 if(term->VideoCursor)
 687                 {
 688                         if(bmp->W * bmp->H != term->VideoCursor->W * term->VideoCursor->H) {
 689                                 free(term->VideoCursor);
 690                                 term->VideoCursor = NULL;
 691                         }
 692                 }
 693                 if(!term->VideoCursor) {
 694                         term->VideoCursor = malloc(sizeof(tVideo_IOCtl_Pos) + bmp->W*bmp->H*sizeof(Uint32));
 695                         if(!term->VideoCursor) {
 696                                 Log_Error("VTerm", "Unable to allocate memory for cursor");
 697                                 errno = -ENOMEM;
 698                                 LEAVE_RET('i', -1);
 699                         }
 700                 }
 701
 702                 memcpy(term->VideoCursor, bmp, sizeof(tVideo_IOCtl_Pos) + bmp->W*bmp->H*sizeof(Uint32));
 703
 704                 Log_Debug("VTerm", "Set VT%i's cursor to %p %ix%i",
 705                         (int)term->Node.Inode, bmp, bmp->W, bmp->H);
 706
 707                 if(gpVT_CurTerm == term)
 708                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSORBITMAP, term->VideoCursor);
 709
 710                 LEAVE('i', 0);
 711                 return 0; }
 712         }
 713         LEAVE('i', -1);
 714         return -1;
 715 }
 716
 717 void VT_Terminal_Reference(tVFS_Node *Node)
 718 {
 719         // Append PID to list
 720 }
 721
 722 void VT_Terminal_Close(tVFS_Node *Node)
 723 {
 724         // Remove PID from list
 725 }
 726
 727 /**
 728  * \fn void VT_SetTerminal(int ID)
 729  * \brief Set the current terminal
 730  */
 731 void VT_SetTerminal(int ID)
 732 {
 733         // Copy the screen state
 734         if( ID != giVT_CurrentTerminal && gpVT_CurTerm->Mode != TERM_MODE_TEXT )
 735         {
 736                 if( !gpVT_CurTerm->Buffer )
 737                         gpVT_CurTerm->Buffer = malloc( gpVT_CurTerm->Width*gpVT_CurTerm->Height*4 );
 738                 if( gpVT_CurTerm->Width < giVT_RealWidth )
 739                 {
 740                         Uint    ofs = 0;
 741                         Uint32  *dest = gpVT_CurTerm->Buffer;
 742                         // Slower scanline copy
 743                         for( int line = 0; line < gpVT_CurTerm->Height; line ++ )
 744                         {
 745                                 VFS_ReadAt(giVT_OutputDevHandle, ofs, gpVT_CurTerm->Width*4, dest);
 746                                 ofs += giVT_RealWidth * 4;
 747                                 dest += gpVT_CurTerm->Width;
 748                         }
 749                 }
 750                 else
 751                 {
 752                         VFS_ReadAt(giVT_OutputDevHandle,
 753                                 0, gpVT_CurTerm->Height*giVT_RealWidth*4,
 754                                 gpVT_CurTerm->Buffer
 755                                 );
 756                 }
 757                 LOG("Cached screen contents");
 758         }
 759
 760         // Update current terminal ID
 761         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 762         giVT_CurrentTerminal = ID;
 763         gpVT_CurTerm = &gVT_Terminals[ID];
 764
 765         LOG("Attempting VT_SetMode");
 766
 767         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 768         {
 769                 VT_SetMode( VIDEO_BUFFMT_TEXT );
 770         }
 771         else
 772         {
 773                 // Update the cursor image
 774                 if(gpVT_CurTerm->VideoCursor)
 775                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSORBITMAP, gpVT_CurTerm->VideoCursor);
 776                 VT_SetMode( VIDEO_BUFFMT_FRAMEBUFFER );
 777         }
 778
 779         LOG("Mode set");
 780
 781         if(gpVT_CurTerm->Buffer)
 782         {
 783                 // TODO: Handle non equal sized
 784                 VFS_WriteAt(
 785                         giVT_OutputDevHandle,
 786                         0,
 787                         gpVT_CurTerm->Width*gpVT_CurTerm->Height*sizeof(Uint32),
 788                         gpVT_CurTerm->Buffer
 789                         );
 790                 LOG("Updated screen contents");
 791         }
 792
 793         VT_int_UpdateCursor(gpVT_CurTerm, 1);
 794         // Update the screen
 795         VT_int_UpdateScreen(gpVT_CurTerm, 1);
 796         LOG("done");
 797 }