drivers/char/vt_ioctl.c

   1 /*
   2  *  linux/drivers/char/vt_ioctl.c
   3  *
   4  *  Copyright (C) 1992 obz under the linux copyright
   5  *
   6  *  Dynamic diacritical handling - aeb@cwi.nl - Dec 1993
   7  *  Dynamic keymap and string allocation - aeb@cwi.nl - May 1994
   8  *  Restrict VT switching via ioctl() - grif@cs.ucr.edu - Dec 1995
   9  *  Some code moved for less code duplication - Andi Kleen - Mar 1997
  10  *  Check put/get_user, cleanups - acme@conectiva.com.br - Jun 2001
  11  */
  12
  13 #include <linux/types.h>
  14 #include <linux/errno.h>
  15 #include <linux/sched.h>
  16 #include <linux/tty.h>
  17 #include <linux/timer.h>
  18 #include <linux/kernel.h>
  19 #include <linux/kd.h>
  20 #include <linux/vt.h>
  21 #include <linux/string.h>
  22 #include <linux/slab.h>
  23 #include <linux/major.h>
  24 #include <linux/fs.h>
  25 #include <linux/console.h>
  26 #include <linux/consolemap.h>
  27 #include <linux/signal.h>
  28 #include <linux/timex.h>
  29
  30 #include <asm/io.h>
  31 #include <asm/uaccess.h>
  32
  33 #include <linux/kbd_kern.h>
  34 #include <linux/vt_kern.h>
  35 #include <linux/kbd_diacr.h>
  36 #include <linux/selection.h>
  37
  38 char vt_dont_switch;
  39 extern struct tty_driver *console_driver;
  40
  41 #define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count)
  42 #define VT_BUSY(i)      (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons)
  43
  44 /*
  45  * Console (vt and kd) routines, as defined by USL SVR4 manual, and by
  46  * experimentation and study of X386 SYSV handling.
  47  *
  48  * One point of difference: SYSV vt's are /dev/vtX, which X >= 0, and
  49  * /dev/console is a separate ttyp. Under Linux, /dev/tty0 is /dev/console,
  50  * and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will
  51  * always treat our set of vt as numbered 1..MAX_NR_CONSOLES (corresponding to
  52  * ttys 0..MAX_NR_CONSOLES-1). Explicitly naming VT 0 is illegal, but using
  53  * /dev/tty0 (fg_console) as a target is legal, since an implicit aliasing
  54  * to the current console is done by the main ioctl code.
  55  */
  56
  57 #ifdef CONFIG_X86
  58 #include <linux/syscalls.h>
  59 #endif
  60
  61 static void complete_change_console(struct vc_data *vc);
  62
  63 /*
  64  * these are the valid i/o ports we're allowed to change. they map all the
  65  * video ports
  66  */
  67 #define GPFIRST 0x3b4
  68 #define GPLAST 0x3df
  69 #define GPNUM (GPLAST - GPFIRST + 1)
  70
  71 #define i (tmp.kb_index)
  72 #define s (tmp.kb_table)
  73 #define v (tmp.kb_value)
  74 static inline int
  75 do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, struct kbd_struct *kbd)
  76 {
  77         struct kbentry tmp;
  78         ushort *key_map, val, ov;
  79
  80         if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
  81                 return -EFAULT;
  82
  83         if (!capable(CAP_SYS_TTY_CONFIG))
  84                 perm = 0;
  85
  86         switch (cmd) {
  87         case KDGKBENT:
  88                 key_map = key_maps[s];
  89                 if (key_map) {
  90                     val = U(key_map[i]);
  91                     if (kbd->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
  92                         val = K_HOLE;
  93                 } else
  94                     val = (i ? K_HOLE : K_NOSUCHMAP);
  95                 return put_user(val, &user_kbe->kb_value);
  96         case KDSKBENT:
  97                 if (!perm)
  98                         return -EPERM;
  99                 if (!i && v == K_NOSUCHMAP) {
 100                         /* deallocate map */
 101                         key_map = key_maps[s];
 102                         if (s && key_map) {
 103                             key_maps[s] = NULL;
 104                             if (key_map[0] == U(K_ALLOCATED)) {
 105                                         kfree(key_map);
 106                                         keymap_count--;
 107                             }
 108                         }
 109                         break;
 110                 }
 111
 112                 if (KTYP(v) < NR_TYPES) {
 113                     if (KVAL(v) > max_vals[KTYP(v)])
 114                                 return -EINVAL;
 115                 } else
 116                     if (kbd->kbdmode != VC_UNICODE)
 117                                 return -EINVAL;
 118
 119                 /* ++Geert: non-PC keyboards may generate keycode zero */
 120 #if !defined(__mc68000__) && !defined(__powerpc__)
 121                 /* assignment to entry 0 only tests validity of args */
 122                 if (!i)
 123                         break;
 124 #endif
 125
 126                 if (!(key_map = key_maps[s])) {
 127                         int j;
 128
 129                         if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
 130                             !capable(CAP_SYS_RESOURCE))
 131                                 return -EPERM;
 132
 133                         key_map = kmalloc(sizeof(plain_map),
 134                                                      GFP_KERNEL);
 135                         if (!key_map)
 136                                 return -ENOMEM;
 137                         key_maps[s] = key_map;
 138                         key_map[0] = U(K_ALLOCATED);
 139                         for (j = 1; j < NR_KEYS; j++)
 140                                 key_map[j] = U(K_HOLE);
 141                         keymap_count++;
 142                 }
 143                 ov = U(key_map[i]);
 144                 if (v == ov)
 145                         break;  /* nothing to do */
 146                 /*
 147                  * Attention Key.
 148                  */
 149                 if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN))
 150                         return -EPERM;
 151                 key_map[i] = U(v);
 152                 if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT))
 153                         compute_shiftstate();
 154                 break;
 155         }
 156         return 0;
 157 }
 158 #undef i
 159 #undef s
 160 #undef v
 161
 162 static inline int
 163 do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc, int perm)
 164 {
 165         struct kbkeycode tmp;
 166         int kc = 0;
 167
 168         if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
 169                 return -EFAULT;
 170         switch (cmd) {
 171         case KDGETKEYCODE:
 172                 kc = getkeycode(tmp.scancode);
 173                 if (kc >= 0)
 174                         kc = put_user(kc, &user_kbkc->keycode);
 175                 break;
 176         case KDSETKEYCODE:
 177                 if (!perm)
 178                         return -EPERM;
 179                 kc = setkeycode(tmp.scancode, tmp.keycode);
 180                 break;
 181         }
 182         return kc;
 183 }
 184
 185 static inline int
 186 do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
 187 {
 188         struct kbsentry *kbs;
 189         char *p;
 190         u_char *q;
 191         u_char __user *up;
 192         int sz;
 193         int delta;
 194         char *first_free, *fj, *fnw;
 195         int i, j, k;
 196         int ret;
 197
 198         if (!capable(CAP_SYS_TTY_CONFIG))
 199                 perm = 0;
 200
 201         kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
 202         if (!kbs) {
 203                 ret = -ENOMEM;
 204                 goto reterr;
 205         }
 206
 207         /* we mostly copy too much here (512bytes), but who cares ;) */
 208         if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) {
 209                 ret = -EFAULT;
 210                 goto reterr;
 211         }
 212         kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';
 213         i = kbs->kb_func;
 214
 215         switch (cmd) {
 216         case KDGKBSENT:
 217                 sz = sizeof(kbs->kb_string) - 1; /* sz should have been
 218                                                   a struct member */
 219                 up = user_kdgkb->kb_string;
 220                 p = func_table[i];
 221                 if(p)
 222                         for ( ; *p && sz; p++, sz--)
 223                                 if (put_user(*p, up++)) {
 224                                         ret = -EFAULT;
 225                                         goto reterr;
 226                                 }
 227                 if (put_user('\0', up)) {
 228                         ret = -EFAULT;
 229                         goto reterr;
 230                 }
 231                 kfree(kbs);
 232                 return ((p && *p) ? -EOVERFLOW : 0);
 233         case KDSKBSENT:
 234                 if (!perm) {
 235                         ret = -EPERM;
 236                         goto reterr;
 237                 }
 238
 239                 q = func_table[i];
 240                 first_free = funcbufptr + (funcbufsize - funcbufleft);
 241                 for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++)
 242                         ;
 243                 if (j < MAX_NR_FUNC)
 244                         fj = func_table[j];
 245                 else
 246                         fj = first_free;
 247
 248                 delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
 249                 if (delta <= funcbufleft) {     /* it fits in current buf */
 250                     if (j < MAX_NR_FUNC) {
 251                         memmove(fj + delta, fj, first_free - fj);
 252                         for (k = j; k < MAX_NR_FUNC; k++)
 253                             if (func_table[k])
 254                                 func_table[k] += delta;
 255                     }
 256                     if (!q)
 257                       func_table[i] = fj;
 258                     funcbufleft -= delta;
 259                 } else {                        /* allocate a larger buffer */
 260                     sz = 256;
 261                     while (sz < funcbufsize - funcbufleft + delta)
 262                       sz <<= 1;
 263                     fnw = kmalloc(sz, GFP_KERNEL);
 264                     if(!fnw) {
 265                       ret = -ENOMEM;
 266                       goto reterr;
 267                     }
 268
 269                     if (!q)
 270                       func_table[i] = fj;
 271                     if (fj > funcbufptr)
 272                         memmove(fnw, funcbufptr, fj - funcbufptr);
 273                     for (k = 0; k < j; k++)
 274                       if (func_table[k])
 275                         func_table[k] = fnw + (func_table[k] - funcbufptr);
 276
 277                     if (first_free > fj) {
 278                         memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);
 279                         for (k = j; k < MAX_NR_FUNC; k++)
 280                           if (func_table[k])
 281                             func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;
 282                     }
 283                     if (funcbufptr != func_buf)
 284                       kfree(funcbufptr);
 285                     funcbufptr = fnw;
 286                     funcbufleft = funcbufleft - delta + sz - funcbufsize;
 287                     funcbufsize = sz;
 288                 }
 289                 strcpy(func_table[i], kbs->kb_string);
 290                 break;
 291         }
 292         ret = 0;
 293 reterr:
 294         kfree(kbs);
 295         return ret;
 296 }
 297
 298 static inline int
 299 do_fontx_ioctl(int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op)
 300 {
 301         struct consolefontdesc cfdarg;
 302         int i;
 303
 304         if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc)))
 305                 return -EFAULT;
 306
 307         switch (cmd) {
 308         case PIO_FONTX:
 309                 if (!perm)
 310                         return -EPERM;
 311                 op->op = KD_FONT_OP_SET;
 312                 op->flags = KD_FONT_FLAG_OLD;
 313                 op->width = 8;
 314                 op->height = cfdarg.charheight;
 315                 op->charcount = cfdarg.charcount;
 316                 op->data = cfdarg.chardata;
 317                 return con_font_op(vc_cons[fg_console].d, op);
 318         case GIO_FONTX: {
 319                 op->op = KD_FONT_OP_GET;
 320                 op->flags = KD_FONT_FLAG_OLD;
 321                 op->width = 8;
 322                 op->height = cfdarg.charheight;
 323                 op->charcount = cfdarg.charcount;
 324                 op->data = cfdarg.chardata;
 325                 i = con_font_op(vc_cons[fg_console].d, op);
 326                 if (i)
 327                         return i;
 328                 cfdarg.charheight = op->height;
 329                 cfdarg.charcount = op->charcount;
 330                 if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc)))
 331                         return -EFAULT;
 332                 return 0;
 333                 }
 334         }
 335         return -EINVAL;
 336 }
 337
 338 static inline int
 339 do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_data *vc)
 340 {
 341         struct unimapdesc tmp;
 342
 343         if (copy_from_user(&tmp, user_ud, sizeof tmp))
 344                 return -EFAULT;
 345         if (tmp.entries)
 346                 if (!access_ok(VERIFY_WRITE, tmp.entries,
 347                                 tmp.entry_ct*sizeof(struct unipair)))
 348                         return -EFAULT;
 349         switch (cmd) {
 350         case PIO_UNIMAP:
 351                 if (!perm)
 352                         return -EPERM;
 353                 return con_set_unimap(vc, tmp.entry_ct, tmp.entries);
 354         case GIO_UNIMAP:
 355                 if (!perm && fg_console != vc->vc_num)
 356                         return -EPERM;
 357                 return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp.entries);
 358         }
 359         return 0;
 360 }
 361
 362 /*
 363  * We handle the console-specific ioctl's here.  We allow the
 364  * capability to modify any console, not just the fg_console.
 365  */
 366 int vt_ioctl(struct tty_struct *tty, struct file * file,
 367              unsigned int cmd, unsigned long arg)
 368 {
 369         struct vc_data *vc = (struct vc_data *)tty->driver_data;
 370         struct console_font_op op;      /* used in multiple places here */
 371         struct kbd_struct * kbd;
 372         unsigned int console;
 373         unsigned char ucval;
 374         void __user *up = (void __user *)arg;
 375         int i, perm;
 376         int ret = 0;
 377
 378         console = vc->vc_num;
 379
 380         lock_kernel();
 381
 382         if (!vc_cons_allocated(console)) {      /* impossible? */
 383                 ret = -ENOIOCTLCMD;
 384                 goto out;
 385         }
 386
 387
 388         /*
 389          * To have permissions to do most of the vt ioctls, we either have
 390          * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
 391          */
 392         perm = 0;
 393         if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG))
 394                 perm = 1;
 395
 396         kbd = kbd_table + console;
 397         switch (cmd) {
 398         case TIOCLINUX:
 399                 return tioclinux(tty, arg);
 400         case KIOCSOUND:
 401                 if (!perm)
 402                         goto eperm;
 403                 if (arg)
 404                         arg = CLOCK_TICK_RATE / arg;
 405                 kd_mksound(arg, 0);
 406                 break;
 407
 408         case KDMKTONE:
 409                 if (!perm)
 410                         goto eperm;
 411         {
 412                 unsigned int ticks, count;
 413
 414                 /*
 415                  * Generate the tone for the appropriate number of ticks.
 416                  * If the time is zero, turn off sound ourselves.
 417                  */
 418                 ticks = HZ * ((arg >> 16) & 0xffff) / 1000;
 419                 count = ticks ? (arg & 0xffff) : 0;
 420                 if (count)
 421                         count = CLOCK_TICK_RATE / count;
 422                 kd_mksound(count, ticks);
 423                 break;
 424         }
 425
 426         case KDGKBTYPE:
 427                 /*
 428                  * this is naive.
 429                  */
 430                 ucval = KB_101;
 431                 goto setchar;
 432
 433                 /*
 434                  * These cannot be implemented on any machine that implements
 435                  * ioperm() in user level (such as Alpha PCs) or not at all.
 436                  *
 437                  * XXX: you should never use these, just call ioperm directly..
 438                  */
 439 #ifdef CONFIG_X86
 440         case KDADDIO:
 441         case KDDELIO:
 442                 /*
 443                  * KDADDIO and KDDELIO may be able to add ports beyond what
 444                  * we reject here, but to be safe...
 445                  */
 446                 if (arg < GPFIRST || arg > GPLAST) {
 447                         ret = -EINVAL;
 448                         break;
 449                 }
 450                 ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
 451                 break;
 452
 453         case KDENABIO:
 454         case KDDISABIO:
 455                 ret = sys_ioperm(GPFIRST, GPNUM,
 456                                   (cmd == KDENABIO)) ? -ENXIO : 0;
 457                 break;
 458 #endif
 459
 460         /* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */
 461
 462         case KDKBDREP:
 463         {
 464                 struct kbd_repeat kbrep;
 465
 466                 if (!capable(CAP_SYS_TTY_CONFIG))
 467                         goto eperm;
 468
 469                 if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) {
 470                         ret =  -EFAULT;
 471                         break;
 472                 }
 473                 ret = kbd_rate(&kbrep);
 474                 if (ret)
 475                         break;
 476                 if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat)))
 477                         ret = -EFAULT;
 478                 break;
 479         }
 480
 481         case KDSETMODE:
 482                 /*
 483                  * currently, setting the mode from KD_TEXT to KD_GRAPHICS
 484                  * doesn't do a whole lot. i'm not sure if it should do any
 485                  * restoration of modes or what...
 486                  *
 487                  * XXX It should at least call into the driver, fbdev's definitely
 488                  * need to restore their engine state. --BenH
 489                  */
 490                 if (!perm)
 491                         goto eperm;
 492                 switch (arg) {
 493                 case KD_GRAPHICS:
 494                         break;
 495                 case KD_TEXT0:
 496                 case KD_TEXT1:
 497                         arg = KD_TEXT;
 498                 case KD_TEXT:
 499                         break;
 500                 default:
 501                         ret = -EINVAL;
 502                         goto out;
 503                 }
 504                 if (vc->vc_mode == (unsigned char) arg)
 505                         break;
 506                 vc->vc_mode = (unsigned char) arg;
 507                 if (console != fg_console)
 508                         break;
 509                 /*
 510                  * explicitly blank/unblank the screen if switching modes
 511                  */
 512                 acquire_console_sem();
 513                 if (arg == KD_TEXT)
 514                         do_unblank_screen(1);
 515                 else
 516                         do_blank_screen(1);
 517                 release_console_sem();
 518                 break;
 519
 520         case KDGETMODE:
 521                 ucval = vc->vc_mode;
 522                 goto setint;
 523
 524         case KDMAPDISP:
 525         case KDUNMAPDISP:
 526                 /*
 527                  * these work like a combination of mmap and KDENABIO.
 528                  * this could be easily finished.
 529                  */
 530                 ret = -EINVAL;
 531                 break;
 532
 533         case KDSKBMODE:
 534                 if (!perm)
 535                         goto eperm;
 536                 switch(arg) {
 537                   case K_RAW:
 538                         kbd->kbdmode = VC_RAW;
 539                         break;
 540                   case K_MEDIUMRAW:
 541                         kbd->kbdmode = VC_MEDIUMRAW;
 542                         break;
 543                   case K_XLATE:
 544                         kbd->kbdmode = VC_XLATE;
 545                         compute_shiftstate();
 546                         break;
 547                   case K_UNICODE:
 548                         kbd->kbdmode = VC_UNICODE;
 549                         compute_shiftstate();
 550                         break;
 551                   default:
 552                         ret = -EINVAL;
 553                         goto out;
 554                 }
 555                 tty_ldisc_flush(tty);
 556                 break;
 557
 558         case KDGKBMODE:
 559                 ucval = ((kbd->kbdmode == VC_RAW) ? K_RAW :
 560                                  (kbd->kbdmode == VC_MEDIUMRAW) ? K_MEDIUMRAW :
 561                                  (kbd->kbdmode == VC_UNICODE) ? K_UNICODE :
 562                                  K_XLATE);
 563                 goto setint;
 564
 565         /* this could be folded into KDSKBMODE, but for compatibility
 566            reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */
 567         case KDSKBMETA:
 568                 switch(arg) {
 569                   case K_METABIT:
 570                         clr_vc_kbd_mode(kbd, VC_META);
 571                         break;
 572                   case K_ESCPREFIX:
 573                         set_vc_kbd_mode(kbd, VC_META);
 574                         break;
 575                   default:
 576                         ret = -EINVAL;
 577                 }
 578                 break;
 579
 580         case KDGKBMETA:
 581                 ucval = (vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT);
 582         setint:
 583                 ret = put_user(ucval, (int __user *)arg);
 584                 break;
 585
 586         case KDGETKEYCODE:
 587         case KDSETKEYCODE:
 588                 if(!capable(CAP_SYS_TTY_CONFIG))
 589                         perm = 0;
 590                 ret = do_kbkeycode_ioctl(cmd, up, perm);
 591                 break;
 592
 593         case KDGKBENT:
 594         case KDSKBENT:
 595                 ret = do_kdsk_ioctl(cmd, up, perm, kbd);
 596                 break;
 597
 598         case KDGKBSENT:
 599         case KDSKBSENT:
 600                 ret = do_kdgkb_ioctl(cmd, up, perm);
 601                 break;
 602
 603         case KDGKBDIACR:
 604         {
 605                 struct kbdiacrs __user *a = up;
 606                 struct kbdiacr diacr;
 607                 int i;
 608
 609                 if (put_user(accent_table_size, &a->kb_cnt)) {
 610                         ret = -EFAULT;
 611                         break;
 612                 }
 613                 for (i = 0; i < accent_table_size; i++) {
 614                         diacr.diacr = conv_uni_to_8bit(accent_table[i].diacr);
 615                         diacr.base = conv_uni_to_8bit(accent_table[i].base);
 616                         diacr.result = conv_uni_to_8bit(accent_table[i].result);
 617                         if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr))) {
 618                                 ret = -EFAULT;
 619                                 break;
 620                         }
 621                 }
 622                 break;
 623         }
 624         case KDGKBDIACRUC:
 625         {
 626                 struct kbdiacrsuc __user *a = up;
 627
 628                 if (put_user(accent_table_size, &a->kb_cnt))
 629                         ret = -EFAULT;
 630                 else if (copy_to_user(a->kbdiacruc, accent_table,
 631                                 accent_table_size*sizeof(struct kbdiacruc)))
 632                         ret = -EFAULT;
 633                 break;
 634         }
 635
 636         case KDSKBDIACR:
 637         {
 638                 struct kbdiacrs __user *a = up;
 639                 struct kbdiacr diacr;
 640                 unsigned int ct;
 641                 int i;
 642
 643                 if (!perm)
 644                         goto eperm;
 645                 if (get_user(ct,&a->kb_cnt)) {
 646                         ret = -EFAULT;
 647                         break;
 648                 }
 649                 if (ct >= MAX_DIACR) {
 650                         ret = -EINVAL;
 651                         break;
 652                 }
 653                 accent_table_size = ct;
 654                 for (i = 0; i < ct; i++) {
 655                         if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr))) {
 656                                 ret = -EFAULT;
 657                                 break;
 658                         }
 659                         accent_table[i].diacr = conv_8bit_to_uni(diacr.diacr);
 660                         accent_table[i].base = conv_8bit_to_uni(diacr.base);
 661                         accent_table[i].result = conv_8bit_to_uni(diacr.result);
 662                 }
 663                 break;
 664         }
 665
 666         case KDSKBDIACRUC:
 667         {
 668                 struct kbdiacrsuc __user *a = up;
 669                 unsigned int ct;
 670
 671                 if (!perm)
 672                         goto eperm;
 673                 if (get_user(ct,&a->kb_cnt)) {
 674                         ret = -EFAULT;
 675                         break;
 676                 }
 677                 if (ct >= MAX_DIACR) {
 678                         ret = -EINVAL;
 679                         break;
 680                 }
 681                 accent_table_size = ct;
 682                 if (copy_from_user(accent_table, a->kbdiacruc, ct*sizeof(struct kbdiacruc)))
 683                         ret = -EFAULT;
 684                 break;
 685         }
 686
 687         /* the ioctls below read/set the flags usually shown in the leds */
 688         /* don't use them - they will go away without warning */
 689         case KDGKBLED:
 690                 ucval = kbd->ledflagstate | (kbd->default_ledflagstate << 4);
 691                 goto setchar;
 692
 693         case KDSKBLED:
 694                 if (!perm)
 695                         goto eperm;
 696                 if (arg & ~0x77) {
 697                         ret = -EINVAL;
 698                         break;
 699                 }
 700                 kbd->ledflagstate = (arg & 7);
 701                 kbd->default_ledflagstate = ((arg >> 4) & 7);
 702                 set_leds();
 703                 break;
 704
 705         /* the ioctls below only set the lights, not the functions */
 706         /* for those, see KDGKBLED and KDSKBLED above */
 707         case KDGETLED:
 708                 ucval = getledstate();
 709         setchar:
 710                 ret = put_user(ucval, (char __user *)arg);
 711                 break;
 712
 713         case KDSETLED:
 714                 if (!perm)
 715                         goto eperm;
 716                 setledstate(kbd, arg);
 717                 break;
 718
 719         /*
 720          * A process can indicate its willingness to accept signals
 721          * generated by pressing an appropriate key combination.
 722          * Thus, one can have a daemon that e.g. spawns a new console
 723          * upon a keypress and then changes to it.
 724          * See also the kbrequest field of inittab(5).
 725          */
 726         case KDSIGACCEPT:
 727         {
 728                 if (!perm || !capable(CAP_KILL))
 729                         goto eperm;
 730                 if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)
 731                         ret = -EINVAL;
 732                 else {
 733                         spin_lock_irq(&vt_spawn_con.lock);
 734                         put_pid(vt_spawn_con.pid);
 735                         vt_spawn_con.pid = get_pid(task_pid(current));
 736                         vt_spawn_con.sig = arg;
 737                         spin_unlock_irq(&vt_spawn_con.lock);
 738                 }
 739                 break;
 740         }
 741
 742         case VT_SETMODE:
 743         {
 744                 struct vt_mode tmp;
 745
 746                 if (!perm)
 747                         goto eperm;
 748                 if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) {
 749                         ret = -EFAULT;
 750                         goto out;
 751                 }
 752                 if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) {
 753                         ret = -EINVAL;
 754                         goto out;
 755                 }
 756                 acquire_console_sem();
 757                 vc->vt_mode = tmp;
 758                 /* the frsig is ignored, so we set it to 0 */
 759                 vc->vt_mode.frsig = 0;
 760                 put_pid(vc->vt_pid);
 761                 vc->vt_pid = get_pid(task_pid(current));
 762                 /* no switch is required -- saw@shade.msu.ru */
 763                 vc->vt_newvt = -1;
 764                 release_console_sem();
 765                 break;
 766         }
 767
 768         case VT_GETMODE:
 769         {
 770                 struct vt_mode tmp;
 771                 int rc;
 772
 773                 acquire_console_sem();
 774                 memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode));
 775                 release_console_sem();
 776
 777                 rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));
 778                 if (rc)
 779                         ret = -EFAULT;
 780                 break;
 781         }
 782
 783         /*
 784          * Returns global vt state. Note that VT 0 is always open, since
 785          * it's an alias for the current VT, and people can't use it here.
 786          * We cannot return state for more than 16 VTs, since v_state is short.
 787          */
 788         case VT_GETSTATE:
 789         {
 790                 struct vt_stat __user *vtstat = up;
 791                 unsigned short state, mask;
 792
 793                 if (put_user(fg_console + 1, &vtstat->v_active))
 794                         ret = -EFAULT;
 795                 else {
 796                         state = 1;      /* /dev/tty0 is always open */
 797                         for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask;
 798                                                         ++i, mask <<= 1)
 799                                 if (VT_IS_IN_USE(i))
 800                                         state |= mask;
 801                         ret = put_user(state, &vtstat->v_state);
 802                 }
 803                 break;
 804         }
 805
 806         /*
 807          * Returns the first available (non-opened) console.
 808          */
 809         case VT_OPENQRY:
 810                 for (i = 0; i < MAX_NR_CONSOLES; ++i)
 811                         if (! VT_IS_IN_USE(i))
 812                                 break;
 813                 ucval = i < MAX_NR_CONSOLES ? (i+1) : -1;
 814                 goto setint;
 815
 816         /*
 817          * ioctl(fd, VT_ACTIVATE, num) will cause us to switch to vt # num,
 818          * with num >= 1 (switches to vt 0, our console, are not allowed, just
 819          * to preserve sanity).
 820          */
 821         case VT_ACTIVATE:
 822                 if (!perm)
 823                         goto eperm;
 824                 if (arg == 0 || arg > MAX_NR_CONSOLES)
 825                         ret =  -ENXIO;
 826                 else {
 827                         arg--;
 828                         acquire_console_sem();
 829                         ret = vc_allocate(arg);
 830                         release_console_sem();
 831                         if (ret)
 832                                 break;
 833                         set_console(arg);
 834                 }
 835                 break;
 836
 837         /*
 838          * wait until the specified VT has been activated
 839          */
 840         case VT_WAITACTIVE:
 841                 if (!perm)
 842                         goto eperm;
 843                 if (arg == 0 || arg > MAX_NR_CONSOLES)
 844                         ret = -ENXIO;
 845                 else
 846                         ret = vt_waitactive(arg - 1);
 847                 break;
 848
 849         /*
 850          * If a vt is under process control, the kernel will not switch to it
 851          * immediately, but postpone the operation until the process calls this
 852          * ioctl, allowing the switch to complete.
 853          *
 854          * According to the X sources this is the behavior:
 855          *      0:      pending switch-from not OK
 856          *      1:      pending switch-from OK
 857          *      2:      completed switch-to OK
 858          */
 859         case VT_RELDISP:
 860                 if (!perm)
 861                         goto eperm;
 862
 863                 if (vc->vt_mode.mode != VT_PROCESS) {
 864                         ret = -EINVAL;
 865                         break;
 866                 }
 867                 /*
 868                  * Switching-from response
 869                  */
 870                 acquire_console_sem();
 871                 if (vc->vt_newvt >= 0) {
 872                         if (arg == 0)
 873                                 /*
 874                                  * Switch disallowed, so forget we were trying
 875                                  * to do it.
 876                                  */
 877                                 vc->vt_newvt = -1;
 878
 879                         else {
 880                                 /*
 881                                  * The current vt has been released, so
 882                                  * complete the switch.
 883                                  */
 884                                 int newvt;
 885                                 newvt = vc->vt_newvt;
 886                                 vc->vt_newvt = -1;
 887                                 ret = vc_allocate(newvt);
 888                                 if (ret) {
 889                                         release_console_sem();
 890                                         break;
 891                                 }
 892                                 /*
 893                                  * When we actually do the console switch,
 894                                  * make sure we are atomic with respect to
 895                                  * other console switches..
 896                                  */
 897                                 complete_change_console(vc_cons[newvt].d);
 898                         }
 899                 } else {
 900                         /*
 901                          * Switched-to response
 902                          */
 903                         /*
 904                          * If it's just an ACK, ignore it
 905                          */
 906                         if (arg != VT_ACKACQ)
 907                                 ret = -EINVAL;
 908                 }
 909                 release_console_sem();
 910                 break;
 911
 912          /*
 913           * Disallocate memory associated to VT (but leave VT1)
 914           */
 915          case VT_DISALLOCATE:
 916                 if (arg > MAX_NR_CONSOLES) {
 917                         ret = -ENXIO;
 918                         break;
 919                 }
 920                 if (arg == 0) {
 921                     /* deallocate all unused consoles, but leave 0 */
 922                         acquire_console_sem();
 923                         for (i=1; i<MAX_NR_CONSOLES; i++)
 924                                 if (! VT_BUSY(i))
 925                                         vc_deallocate(i);
 926                         release_console_sem();
 927                 } else {
 928                         /* deallocate a single console, if possible */
 929                         arg--;
 930                         if (VT_BUSY(arg))
 931                                 ret = -EBUSY;
 932                         else if (arg) {                       /* leave 0 */
 933                                 acquire_console_sem();
 934                                 vc_deallocate(arg);
 935                                 release_console_sem();
 936                         }
 937                 }
 938                 break;
 939
 940         case VT_RESIZE:
 941         {
 942                 struct vt_sizes __user *vtsizes = up;
 943                 struct vc_data *vc;
 944
 945                 ushort ll,cc;
 946                 if (!perm)
 947                         goto eperm;
 948                 if (get_user(ll, &vtsizes->v_rows) ||
 949                     get_user(cc, &vtsizes->v_cols))
 950                         ret = -EFAULT;
 951                 else {
 952                         acquire_console_sem();
 953                         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 954                                 vc = vc_cons[i].d;
 955
 956                                 if (vc) {
 957                                         vc->vc_resize_user = 1;
 958                                         vc_resize(vc_cons[i].d, cc, ll);
 959                                 }
 960                         }
 961                         release_console_sem();
 962                 }
 963                 break;
 964         }
 965
 966         case VT_RESIZEX:
 967         {
 968                 struct vt_consize __user *vtconsize = up;
 969                 ushort ll,cc,vlin,clin,vcol,ccol;
 970                 if (!perm)
 971                         goto eperm;
 972                 if (!access_ok(VERIFY_READ, vtconsize,
 973                                 sizeof(struct vt_consize))) {
 974                         ret = -EFAULT;
 975                         break;
 976                 }
 977                 /* FIXME: Should check the copies properly */
 978                 __get_user(ll, &vtconsize->v_rows);
 979                 __get_user(cc, &vtconsize->v_cols);
 980                 __get_user(vlin, &vtconsize->v_vlin);
 981                 __get_user(clin, &vtconsize->v_clin);
 982                 __get_user(vcol, &vtconsize->v_vcol);
 983                 __get_user(ccol, &vtconsize->v_ccol);
 984                 vlin = vlin ? vlin : vc->vc_scan_lines;
 985                 if (clin) {
 986                         if (ll) {
 987                                 if (ll != vlin/clin) {
 988                                         /* Parameters don't add up */
 989                                         ret = -EINVAL;
 990                                         break;
 991                                 }
 992                         } else
 993                                 ll = vlin/clin;
 994                 }
 995                 if (vcol && ccol) {
 996                         if (cc) {
 997                                 if (cc != vcol/ccol) {
 998                                         ret = -EINVAL;
 999                                         break;
1000                                 }
1001                         } else
1002                                 cc = vcol/ccol;
1003                 }
1004
1005                 if (clin > 32) {
1006                         ret =  -EINVAL;
1007                         break;
1008                 }
1009
1010                 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1011                         if (!vc_cons[i].d)
1012                                 continue;
1013                         acquire_console_sem();
1014                         if (vlin)
1015                                 vc_cons[i].d->vc_scan_lines = vlin;
1016                         if (clin)
1017                                 vc_cons[i].d->vc_font.height = clin;
1018                         vc_cons[i].d->vc_resize_user = 1;
1019                         vc_resize(vc_cons[i].d, cc, ll);
1020                         release_console_sem();
1021                 }
1022                 break;
1023         }
1024
1025         case PIO_FONT: {
1026                 if (!perm)
1027                         goto eperm;
1028                 op.op = KD_FONT_OP_SET;
1029                 op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */
1030                 op.width = 8;
1031                 op.height = 0;
1032                 op.charcount = 256;
1033                 op.data = up;
1034                 ret = con_font_op(vc_cons[fg_console].d, &op);
1035                 break;
1036         }
1037
1038         case GIO_FONT: {
1039                 op.op = KD_FONT_OP_GET;
1040                 op.flags = KD_FONT_FLAG_OLD;
1041                 op.width = 8;
1042                 op.height = 32;
1043                 op.charcount = 256;
1044                 op.data = up;
1045                 ret = con_font_op(vc_cons[fg_console].d, &op);
1046                 break;
1047         }
1048
1049         case PIO_CMAP:
1050                 if (!perm)
1051                         ret = -EPERM;
1052                 else
1053                         ret = con_set_cmap(up);
1054                 break;
1055
1056         case GIO_CMAP:
1057                 ret = con_get_cmap(up);
1058                 break;
1059
1060         case PIO_FONTX:
1061         case GIO_FONTX:
1062                 ret = do_fontx_ioctl(cmd, up, perm, &op);
1063                 break;
1064
1065         case PIO_FONTRESET:
1066         {
1067                 if (!perm)
1068                         goto eperm;
1069
1070 #ifdef BROKEN_GRAPHICS_PROGRAMS
1071                 /* With BROKEN_GRAPHICS_PROGRAMS defined, the default
1072                    font is not saved. */
1073                 ret = -ENOSYS;
1074                 break;
1075 #else
1076                 {
1077                 op.op = KD_FONT_OP_SET_DEFAULT;
1078                 op.data = NULL;
1079                 ret = con_font_op(vc_cons[fg_console].d, &op);
1080                 if (ret)
1081                         break;
1082                 con_set_default_unimap(vc_cons[fg_console].d);
1083                 break;
1084                 }
1085 #endif
1086         }
1087
1088         case KDFONTOP: {
1089                 if (copy_from_user(&op, up, sizeof(op))) {
1090                         ret = -EFAULT;
1091                         break;
1092                 }
1093                 if (!perm && op.op != KD_FONT_OP_GET)
1094                         goto eperm;
1095                 ret = con_font_op(vc, &op);
1096                 if (ret)
1097                         break;
1098                 if (copy_to_user(up, &op, sizeof(op)))
1099                         ret = -EFAULT;
1100                 break;
1101         }
1102
1103         case PIO_SCRNMAP:
1104                 if (!perm)
1105                         ret = -EPERM;
1106                 else
1107                         ret = con_set_trans_old(up);
1108                 break;
1109
1110         case GIO_SCRNMAP:
1111                 ret = con_get_trans_old(up);
1112                 break;
1113
1114         case PIO_UNISCRNMAP:
1115                 if (!perm)
1116                         ret = -EPERM;
1117                 else
1118                         ret = con_set_trans_new(up);
1119                 break;
1120
1121         case GIO_UNISCRNMAP:
1122                 ret = con_get_trans_new(up);
1123                 break;
1124
1125         case PIO_UNIMAPCLR:
1126               { struct unimapinit ui;
1127                 if (!perm)
1128                         goto eperm;
1129                 ret = copy_from_user(&ui, up, sizeof(struct unimapinit));
1130                 if (!ret)
1131                         con_clear_unimap(vc, &ui);
1132                 break;
1133               }
1134
1135         case PIO_UNIMAP:
1136         case GIO_UNIMAP:
1137                 ret = do_unimap_ioctl(cmd, up, perm, vc);
1138                 break;
1139
1140         case VT_LOCKSWITCH:
1141                 if (!capable(CAP_SYS_TTY_CONFIG))
1142                         goto eperm;
1143                 vt_dont_switch = 1;
1144                 break;
1145         case VT_UNLOCKSWITCH:
1146                 if (!capable(CAP_SYS_TTY_CONFIG))
1147                         goto eperm;
1148                 vt_dont_switch = 0;
1149                 break;
1150         case VT_GETHIFONTMASK:
1151                 ret = put_user(vc->vc_hi_font_mask,
1152                                         (unsigned short __user *)arg);
1153                 break;
1154         default:
1155                 ret = -ENOIOCTLCMD;
1156         }
1157 out:
1158         unlock_kernel();
1159         return ret;
1160 eperm:
1161         ret = -EPERM;
1162         goto out;
1163 }
1164
1165 /*
1166  * Sometimes we want to wait until a particular VT has been activated. We
1167  * do it in a very simple manner. Everybody waits on a single queue and
1168  * get woken up at once. Those that are satisfied go on with their business,
1169  * while those not ready go back to sleep. Seems overkill to add a wait
1170  * to each vt just for this - usually this does nothing!
1171  */
1172 static DECLARE_WAIT_QUEUE_HEAD(vt_activate_queue);
1173
1174 /*
1175  * Sleeps until a vt is activated, or the task is interrupted. Returns
1176  * 0 if activation, -EINTR if interrupted by a signal handler.
1177  */
1178 int vt_waitactive(int vt)
1179 {
1180         int retval;
1181         DECLARE_WAITQUEUE(wait, current);
1182
1183         add_wait_queue(&vt_activate_queue, &wait);
1184         for (;;) {
1185                 retval = 0;
1186
1187                 /*
1188                  * Synchronize with redraw_screen(). By acquiring the console
1189                  * semaphore we make sure that the console switch is completed
1190                  * before we return. If we didn't wait for the semaphore, we
1191                  * could return at a point where fg_console has already been
1192                  * updated, but the console switch hasn't been completed.
1193                  */
1194                 acquire_console_sem();
1195                 set_current_state(TASK_INTERRUPTIBLE);
1196                 if (vt == fg_console) {
1197                         release_console_sem();
1198                         break;
1199                 }
1200                 release_console_sem();
1201                 retval = -ERESTARTNOHAND;
1202                 if (signal_pending(current))
1203                         break;
1204                 schedule();
1205         }
1206         remove_wait_queue(&vt_activate_queue, &wait);
1207         __set_current_state(TASK_RUNNING);
1208         return retval;
1209 }
1210
1211 #define vt_wake_waitactive() wake_up(&vt_activate_queue)
1212
1213 void reset_vc(struct vc_data *vc)
1214 {
1215         vc->vc_mode = KD_TEXT;
1216         kbd_table[vc->vc_num].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
1217         vc->vt_mode.mode = VT_AUTO;
1218         vc->vt_mode.waitv = 0;
1219         vc->vt_mode.relsig = 0;
1220         vc->vt_mode.acqsig = 0;
1221         vc->vt_mode.frsig = 0;
1222         put_pid(vc->vt_pid);
1223         vc->vt_pid = NULL;
1224         vc->vt_newvt = -1;
1225         if (!in_interrupt())    /* Via keyboard.c:SAK() - akpm */
1226                 reset_palette(vc);
1227 }
1228
1229 void vc_SAK(struct work_struct *work)
1230 {
1231         struct vc *vc_con =
1232                 container_of(work, struct vc, SAK_work);
1233         struct vc_data *vc;
1234         struct tty_struct *tty;
1235
1236         acquire_console_sem();
1237         vc = vc_con->d;
1238         if (vc) {
1239                 tty = vc->vc_tty;
1240                 /*
1241                  * SAK should also work in all raw modes and reset
1242                  * them properly.
1243                  */
1244                 if (tty)
1245                         __do_SAK(tty);
1246                 reset_vc(vc);
1247         }
1248         release_console_sem();
1249 }
1250
1251 /*
1252  * Performs the back end of a vt switch
1253  */
1254 static void complete_change_console(struct vc_data *vc)
1255 {
1256         unsigned char old_vc_mode;
1257
1258         last_console = fg_console;
1259
1260         /*
1261          * If we're switching, we could be going from KD_GRAPHICS to
1262          * KD_TEXT mode or vice versa, which means we need to blank or
1263          * unblank the screen later.
1264          */
1265         old_vc_mode = vc_cons[fg_console].d->vc_mode;
1266         switch_screen(vc);
1267
1268         /*
1269          * This can't appear below a successful kill_pid().  If it did,
1270          * then the *blank_screen operation could occur while X, having
1271          * received acqsig, is waking up on another processor.  This
1272          * condition can lead to overlapping accesses to the VGA range
1273          * and the framebuffer (causing system lockups).
1274          *
1275          * To account for this we duplicate this code below only if the
1276          * controlling process is gone and we've called reset_vc.
1277          */
1278         if (old_vc_mode != vc->vc_mode) {
1279                 if (vc->vc_mode == KD_TEXT)
1280                         do_unblank_screen(1);
1281                 else
1282                         do_blank_screen(1);
1283         }
1284
1285         /*
1286          * If this new console is under process control, send it a signal
1287          * telling it that it has acquired. Also check if it has died and
1288          * clean up (similar to logic employed in change_console())
1289          */
1290         if (vc->vt_mode.mode == VT_PROCESS) {
1291                 /*
1292                  * Send the signal as privileged - kill_pid() will
1293                  * tell us if the process has gone or something else
1294                  * is awry
1295                  */
1296                 if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) {
1297                 /*
1298                  * The controlling process has died, so we revert back to
1299                  * normal operation. In this case, we'll also change back
1300                  * to KD_TEXT mode. I'm not sure if this is strictly correct
1301                  * but it saves the agony when the X server dies and the screen
1302                  * remains blanked due to KD_GRAPHICS! It would be nice to do
1303                  * this outside of VT_PROCESS but there is no single process
1304                  * to account for and tracking tty count may be undesirable.
1305                  */
1306                         reset_vc(vc);
1307
1308                         if (old_vc_mode != vc->vc_mode) {
1309                                 if (vc->vc_mode == KD_TEXT)
1310                                         do_unblank_screen(1);
1311                                 else
1312                                         do_blank_screen(1);
1313                         }
1314                 }
1315         }
1316
1317         /*
1318          * Wake anyone waiting for their VT to activate
1319          */
1320         vt_wake_waitactive();
1321         return;
1322 }
1323
1324 /*
1325  * Performs the front-end of a vt switch
1326  */
1327 void change_console(struct vc_data *new_vc)
1328 {
1329         struct vc_data *vc;
1330
1331         if (!new_vc || new_vc->vc_num == fg_console || vt_dont_switch)
1332                 return;
1333
1334         /*
1335          * If this vt is in process mode, then we need to handshake with
1336          * that process before switching. Essentially, we store where that
1337          * vt wants to switch to and wait for it to tell us when it's done
1338          * (via VT_RELDISP ioctl).
1339          *
1340          * We also check to see if the controlling process still exists.
1341          * If it doesn't, we reset this vt to auto mode and continue.
1342          * This is a cheap way to track process control. The worst thing
1343          * that can happen is: we send a signal to a process, it dies, and
1344          * the switch gets "lost" waiting for a response; hopefully, the
1345          * user will try again, we'll detect the process is gone (unless
1346          * the user waits just the right amount of time :-) and revert the
1347          * vt to auto control.
1348          */
1349         vc = vc_cons[fg_console].d;
1350         if (vc->vt_mode.mode == VT_PROCESS) {
1351                 /*
1352                  * Send the signal as privileged - kill_pid() will
1353                  * tell us if the process has gone or something else
1354                  * is awry.
1355                  *
1356                  * We need to set vt_newvt *before* sending the signal or we
1357                  * have a race.
1358                  */
1359                 vc->vt_newvt = new_vc->vc_num;
1360                 if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) {
1361                         /*
1362                          * It worked. Mark the vt to switch to and
1363                          * return. The process needs to send us a
1364                          * VT_RELDISP ioctl to complete the switch.
1365                          */
1366                         return;
1367                 }
1368
1369                 /*
1370                  * The controlling process has died, so we revert back to
1371                  * normal operation. In this case, we'll also change back
1372                  * to KD_TEXT mode. I'm not sure if this is strictly correct
1373                  * but it saves the agony when the X server dies and the screen
1374                  * remains blanked due to KD_GRAPHICS! It would be nice to do
1375                  * this outside of VT_PROCESS but there is no single process
1376                  * to account for and tracking tty count may be undesirable.
1377                  */
1378                 reset_vc(vc);
1379
1380                 /*
1381                  * Fall through to normal (VT_AUTO) handling of the switch...
1382                  */
1383         }
1384
1385         /*
1386          * Ignore all switches in KD_GRAPHICS+VT_AUTO mode
1387          */
1388         if (vc->vc_mode == KD_GRAPHICS)
1389                 return;
1390
1391         complete_change_console(new_vc);
1392 }