dlls/msi/source.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2005 Aric Stewart for CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24 #define NONAMELESSUNION
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winreg.h"
  29 #include "winnls.h"
  30 #include "shlwapi.h"
  31 #include "wine/debug.h"
  32 #include "msi.h"
  33 #include "msiquery.h"
  34 #include "msipriv.h"
  35 #include "wincrypt.h"
  36 #include "winver.h"
  37 #include "winuser.h"
  38 #include "wine/unicode.h"
  39 #include "action.h"
  40 #include "sddl.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(msi);
  43
  44 /*
  45  * These apis are defined in MSI 3.0
  46  */
  47
  48 typedef struct tagMediaInfo
  49 {
  50     LPWSTR  path;
  51     WCHAR   szIndex[10];
  52     WCHAR   type;
  53 } media_info;
  54
  55 static UINT OpenSourceKey(LPCWSTR szProduct, HKEY* key, BOOL user, BOOL create)
  56 {
  57     HKEY rootkey = 0;
  58     UINT rc;
  59     static const WCHAR szSourceList[] = {'S','o','u','r','c','e','L','i','s','t',0};
  60
  61     if (user)
  62         rc = MSIREG_OpenUserProductsKey(szProduct, &rootkey, create);
  63     else
  64         rc = MSIREG_OpenProductsKey(szProduct, &rootkey, create);
  65
  66     if (rc)
  67         return rc;
  68
  69     if (create)
  70         rc = RegCreateKeyW(rootkey, szSourceList, key);
  71     else
  72         rc = RegOpenKeyW(rootkey,szSourceList, key);
  73
  74     return rc;
  75 }
  76
  77 static UINT OpenMediaSubkey(HKEY rootkey, HKEY *key, BOOL create)
  78 {
  79     UINT rc;
  80     static const WCHAR media[] = {'M','e','d','i','a',0};
  81
  82     if (create)
  83         rc = RegCreateKeyW(rootkey, media, key);
  84     else
  85         rc = RegOpenKeyW(rootkey,media, key);
  86
  87     return rc;
  88 }
  89
  90 static UINT OpenNetworkSubkey(HKEY rootkey, HKEY *key, BOOL create)
  91 {
  92     UINT rc;
  93     static const WCHAR net[] = {'N','e','t',0};
  94
  95     if (create)
  96         rc = RegCreateKeyW(rootkey, net, key);
  97     else
  98         rc = RegOpenKeyW(rootkey, net, key);
  99
 100     return rc;
 101 }
 102
 103 static UINT OpenURLSubkey(HKEY rootkey, HKEY *key, BOOL create)
 104 {
 105     UINT rc;
 106     static const WCHAR URL[] = {'U','R','L',0};
 107
 108     if (create)
 109         rc = RegCreateKeyW(rootkey, URL, key);
 110     else
 111         rc = RegOpenKeyW(rootkey, URL, key);
 112
 113     return rc;
 114 }
 115
 116
 117 static UINT find_given_source(HKEY key, LPCWSTR szSource, media_info *ss)
 118 {
 119     DWORD index = 0;
 120     WCHAR szIndex[10];
 121     DWORD size;
 122     DWORD val_size;
 123     LPWSTR val;
 124     UINT rc = ERROR_SUCCESS;
 125
 126     while (rc == ERROR_SUCCESS)
 127     {
 128         val = NULL;
 129         val_size = 0;
 130         size = sizeof(szIndex)/sizeof(szIndex[0]);
 131         rc = RegEnumValueW(key, index, szIndex, &size, NULL, NULL, NULL, &val_size);
 132         if (rc != ERROR_NO_MORE_ITEMS)
 133         {
 134             val = msi_alloc(val_size);
 135             RegEnumValueW(key, index, szIndex, &size, NULL, NULL, (LPBYTE)val,
 136                 &val_size);
 137             if (lstrcmpiW(szSource,val)==0)
 138             {
 139                 ss->path = val;
 140                 strcpyW(ss->szIndex,szIndex);
 141                 break;
 142             }
 143             else
 144                 strcpyW(ss->szIndex,szIndex);
 145
 146             msi_free(val);
 147             index ++;
 148         }
 149     }
 150     return rc;
 151 }
 152
 153 /******************************************************************
 154  *  MsiSourceListGetInfoW   (MSI.@)
 155  */
 156 UINT WINAPI MsiSourceListGetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
 157                                    MSIINSTALLCONTEXT dwContext, DWORD dwOptions,
 158                                    LPCWSTR szProperty, LPWSTR szValue,
 159                                    LPDWORD pcchValue)
 160 {
 161     HKEY sourcekey;
 162     UINT rc;
 163
 164     TRACE("%s %s\n", debugstr_w(szProduct), debugstr_w(szProperty));
 165
 166     if (!szProduct || lstrlenW(szProduct) > 39)
 167         return ERROR_INVALID_PARAMETER;
 168
 169     if (szValue && !pcchValue)
 170         return ERROR_INVALID_PARAMETER;
 171
 172     if (dwOptions == MSICODE_PATCH)
 173     {
 174         FIXME("Unhandled options MSICODE_PATCH\n");
 175         return ERROR_FUNCTION_FAILED;
 176     }
 177
 178     if (szUserSid)
 179         FIXME("Unhandled UserSid %s\n",debugstr_w(szUserSid));
 180
 181     if (dwContext == MSIINSTALLCONTEXT_USERUNMANAGED)
 182         FIXME("Unknown context MSIINSTALLCONTEXT_USERUNMANAGED\n");
 183
 184     if (dwContext == MSIINSTALLCONTEXT_MACHINE)
 185         rc = OpenSourceKey(szProduct, &sourcekey, FALSE, FALSE);
 186     else
 187         rc = OpenSourceKey(szProduct, &sourcekey, TRUE, FALSE);
 188
 189     if (rc != ERROR_SUCCESS)
 190         return ERROR_UNKNOWN_PRODUCT;
 191
 192     if (strcmpW(szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW) == 0)
 193     {
 194         HKEY key;
 195         rc = OpenMediaSubkey(sourcekey, &key, FALSE);
 196         if (rc == ERROR_SUCCESS)
 197             rc = RegQueryValueExW(key, INSTALLPROPERTY_MEDIAPACKAGEPATHW,
 198                     0, 0, (LPBYTE)szValue, pcchValue);
 199         if (rc != ERROR_SUCCESS && rc != ERROR_MORE_DATA)
 200             rc = ERROR_UNKNOWN_PROPERTY;
 201         RegCloseKey(key);
 202     }
 203     else if (strcmpW(szProperty, INSTALLPROPERTY_DISKPROMPTW) ==0)
 204     {
 205         HKEY key;
 206         rc = OpenMediaSubkey(sourcekey, &key, FALSE);
 207         if (rc == ERROR_SUCCESS)
 208             rc = RegQueryValueExW(key, INSTALLPROPERTY_DISKPROMPTW, 0, 0,
 209                     (LPBYTE)szValue, pcchValue);
 210         if (rc != ERROR_SUCCESS && rc != ERROR_MORE_DATA)
 211             rc = ERROR_UNKNOWN_PROPERTY;
 212         RegCloseKey(key);
 213     }
 214     else if (strcmpW(szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW)==0)
 215     {
 216         LPWSTR buffer;
 217         DWORD size = 0;
 218
 219         RegQueryValueExW(sourcekey, INSTALLPROPERTY_LASTUSEDSOURCEW, 0, 0,
 220                 NULL, &size);
 221         if (size == 0)
 222             rc = ERROR_UNKNOWN_PROPERTY;
 223         else
 224         {
 225             LPWSTR ptr;
 226             buffer = msi_alloc(size);
 227             rc = RegQueryValueExW(sourcekey, INSTALLPROPERTY_LASTUSEDSOURCEW,
 228                     0, 0, (LPBYTE)buffer,&size);
 229             ptr = strchrW(buffer,';');
 230             if (ptr) ptr = strchrW(ptr+1,';');
 231             if (!ptr)
 232                 rc = ERROR_UNKNOWN_PROPERTY;
 233             else
 234             {
 235                 ptr ++;
 236                 lstrcpynW(szValue, ptr, *pcchValue);
 237                 if (lstrlenW(ptr) > *pcchValue)
 238                 {
 239                     *pcchValue = lstrlenW(ptr)+1;
 240                     rc = ERROR_MORE_DATA;
 241                 }
 242                 else
 243                     rc = ERROR_SUCCESS;
 244             }
 245             msi_free(buffer);
 246         }
 247     }
 248     else if (strcmpW(INSTALLPROPERTY_LASTUSEDTYPEW, szProperty)==0)
 249     {
 250         LPWSTR buffer;
 251         DWORD size = 0;
 252
 253         RegQueryValueExW(sourcekey, INSTALLPROPERTY_LASTUSEDSOURCEW, 0, 0,
 254                 NULL, &size);
 255         if (size == 0)
 256             rc = ERROR_UNKNOWN_PROPERTY;
 257         else
 258         {
 259             buffer = msi_alloc(size);
 260             rc = RegQueryValueExW(sourcekey, INSTALLPROPERTY_LASTUSEDSOURCEW,
 261                     0, 0, (LPBYTE)buffer,&size);
 262             if (*pcchValue < 1)
 263             {
 264                 rc = ERROR_MORE_DATA;
 265                 *pcchValue = 1;
 266             }
 267             else
 268             {
 269                 szValue[0] = buffer[0];
 270                 rc = ERROR_SUCCESS;
 271             }
 272             msi_free(buffer);
 273         }
 274     }
 275     else if (strcmpW(INSTALLPROPERTY_PACKAGENAMEW, szProperty)==0)
 276     {
 277         rc = RegQueryValueExW(sourcekey, INSTALLPROPERTY_PACKAGENAMEW, 0, 0,
 278                 (LPBYTE)szValue, pcchValue);
 279         if (rc != ERROR_SUCCESS && rc != ERROR_MORE_DATA)
 280             rc = ERROR_UNKNOWN_PROPERTY;
 281     }
 282     else
 283     {
 284         FIXME("Unknown property %s\n",debugstr_w(szProperty));
 285         rc = ERROR_UNKNOWN_PROPERTY;
 286     }
 287
 288     RegCloseKey(sourcekey);
 289     return rc;
 290 }
 291
 292 /******************************************************************
 293  *  MsiSourceListSetInfoW   (MSI.@)
 294  */
 295 UINT WINAPI MsiSourceListSetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
 296                                    MSIINSTALLCONTEXT dwContext, DWORD dwOptions,
 297                                    LPCWSTR szProperty, LPCWSTR szValue)
 298 {
 299     HKEY sourcekey;
 300     UINT rc;
 301
 302     TRACE("%s %s %x %lx %s %s\n", debugstr_w(szProduct), debugstr_w(szUserSid),
 303             dwContext, dwOptions, debugstr_w(szProperty), debugstr_w(szValue));
 304
 305     if (!szProduct || lstrlenW(szProduct) > 39)
 306         return ERROR_INVALID_PARAMETER;
 307
 308     if (dwOptions & MSICODE_PATCH)
 309     {
 310         FIXME("Unhandled options MSICODE_PATCH\n");
 311         return ERROR_FUNCTION_FAILED;
 312     }
 313
 314     if (szUserSid)
 315         FIXME("Unhandled UserSid %s\n",debugstr_w(szUserSid));
 316
 317     if (dwContext == MSIINSTALLCONTEXT_USERUNMANAGED)
 318         FIXME("Unknown context MSIINSTALLCONTEXT_USERUNMANAGED\n");
 319
 320     if (dwContext == MSIINSTALLCONTEXT_MACHINE)
 321         rc = OpenSourceKey(szProduct, &sourcekey, FALSE, TRUE);
 322     else
 323         rc = OpenSourceKey(szProduct, &sourcekey, TRUE, TRUE);
 324
 325     if (rc != ERROR_SUCCESS)
 326         return ERROR_UNKNOWN_PRODUCT;
 327
 328
 329     if (strcmpW(szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW) == 0)
 330     {
 331         HKEY key;
 332         DWORD size = lstrlenW(szValue)*sizeof(WCHAR);
 333         rc = OpenMediaSubkey(sourcekey, &key, FALSE);
 334         if (rc == ERROR_SUCCESS)
 335             rc = RegSetValueExW(key, INSTALLPROPERTY_MEDIAPACKAGEPATHW, 0,
 336                     REG_SZ, (LPBYTE)szValue, size);
 337         if (rc != ERROR_SUCCESS)
 338             rc = ERROR_UNKNOWN_PROPERTY;
 339         RegCloseKey(key);
 340     }
 341     else if (strcmpW(szProperty, INSTALLPROPERTY_DISKPROMPTW) == 0)
 342     {
 343         HKEY key;
 344         DWORD size = lstrlenW(szValue)*sizeof(WCHAR);
 345         rc = OpenMediaSubkey(sourcekey, &key, FALSE);
 346         if (rc == ERROR_SUCCESS)
 347             rc = RegSetValueExW(key, INSTALLPROPERTY_DISKPROMPTW, 0,
 348                     REG_SZ, (LPBYTE)szValue, size);
 349         if (rc != ERROR_SUCCESS)
 350             rc = ERROR_UNKNOWN_PROPERTY;
 351         RegCloseKey(key);
 352     }
 353     else if (strcmpW(szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW)==0)
 354     {
 355         LPWSTR buffer = NULL;
 356         DWORD size;
 357         WCHAR typechar = 'n';
 358         static const WCHAR LastUsedSource_Fmt[] = {'%','c',';','%','i',';','%','s',0};
 359
 360         /* make sure the source is registered */
 361         MsiSourceListAddSourceExW(szProduct, szUserSid, dwContext,
 362                 dwOptions, szValue, 0);
 363
 364         if (dwOptions & MSISOURCETYPE_NETWORK)
 365             typechar = 'n';
 366         else if (dwOptions & MSISOURCETYPE_URL)
 367             typechar = 'u';
 368         else if (dwOptions & MSISOURCETYPE_MEDIA)
 369             typechar = 'm';
 370         else
 371             ERR("Unknown source type! 0x%lx\n",dwOptions);
 372
 373         size = (lstrlenW(szValue)+5)*sizeof(WCHAR);
 374         buffer = msi_alloc(size);
 375         sprintfW(buffer, LastUsedSource_Fmt, typechar, 1, szValue);
 376         rc = RegSetValueExW(sourcekey, INSTALLPROPERTY_LASTUSEDSOURCEW, 0,
 377                 REG_EXPAND_SZ, (LPBYTE)buffer, size);
 378         if (rc != ERROR_SUCCESS)
 379             rc = ERROR_UNKNOWN_PROPERTY;
 380         msi_free( buffer );
 381     }
 382     else if (strcmpW(INSTALLPROPERTY_PACKAGENAMEW, szProperty)==0)
 383     {
 384         DWORD size = lstrlenW(szValue)*sizeof(WCHAR);
 385         rc = RegSetValueExW(sourcekey, INSTALLPROPERTY_PACKAGENAMEW, 0,
 386                 REG_SZ, (LPBYTE)szValue, size);
 387         if (rc != ERROR_SUCCESS)
 388             rc = ERROR_UNKNOWN_PROPERTY;
 389     }
 390     else
 391     {
 392         FIXME("Unknown property %s\n",debugstr_w(szProperty));
 393         rc = ERROR_UNKNOWN_PROPERTY;
 394     }
 395
 396     RegCloseKey(sourcekey);
 397     return rc;
 398
 399 }
 400
 401 /******************************************************************
 402  *  MsiSourceListAddSourceW (MSI.@)
 403  */
 404 UINT WINAPI MsiSourceListAddSourceW( LPCWSTR szProduct, LPCWSTR szUserName,
 405         DWORD dwReserved, LPCWSTR szSource)
 406 {
 407     INT ret;
 408     LPWSTR sidstr = NULL;
 409     DWORD sidsize = 0;
 410
 411     TRACE("%s %s %s\n", debugstr_w(szProduct), debugstr_w(szUserName), debugstr_w(szSource));
 412
 413     if (LookupAccountNameW(NULL, szUserName, NULL, &sidsize, NULL, NULL, NULL))
 414     {
 415         PSID psid = msi_alloc(sidsize);
 416
 417         if (LookupAccountNameW(NULL, szUserName, psid, &sidsize, NULL, NULL, NULL))
 418             ConvertSidToStringSidW(psid, &sidstr);
 419
 420         msi_free(psid);
 421     }
 422
 423     ret = MsiSourceListAddSourceExW(szProduct, sidstr,
 424         MSIINSTALLCONTEXT_USERMANAGED, MSISOURCETYPE_NETWORK, szSource, 0);
 425
 426     if (sidstr)
 427         LocalFree(sidstr);
 428
 429     return ret;
 430 }
 431
 432 /******************************************************************
 433  *  MsiSourceListAddSourceA (MSI.@)
 434  */
 435 UINT WINAPI MsiSourceListAddSourceA( LPCSTR szProduct, LPCSTR szUserName,
 436         DWORD dwReserved, LPCSTR szSource)
 437 {
 438     INT ret;
 439     LPWSTR szwproduct;
 440     LPWSTR szwusername;
 441     LPWSTR szwsource;
 442
 443     szwproduct = strdupAtoW( szProduct );
 444     szwusername = strdupAtoW( szUserName );
 445     szwsource = strdupAtoW( szSource );
 446
 447     ret = MsiSourceListAddSourceW(szwproduct, szwusername, 0, szwsource);
 448
 449     msi_free(szwproduct);
 450     msi_free(szwusername);
 451     msi_free(szwsource);
 452
 453     return ret;
 454 }
 455
 456 /******************************************************************
 457  *  MsiSourceListAddSourceExW (MSI.@)
 458  */
 459 UINT WINAPI MsiSourceListAddSourceExW( LPCWSTR szProduct, LPCWSTR szUserSid,
 460         MSIINSTALLCONTEXT dwContext, DWORD dwOptions, LPCWSTR szSource,
 461         DWORD dwIndex)
 462 {
 463     HKEY sourcekey;
 464     HKEY typekey;
 465     UINT rc;
 466     media_info source_struct;
 467
 468     TRACE("%s, %s, %x, %lx, %s, %li\n", debugstr_w(szProduct),
 469             debugstr_w(szUserSid), dwContext, dwOptions, debugstr_w(szSource),
 470             dwIndex);
 471
 472     if (!szProduct)
 473         return ERROR_INVALID_PARAMETER;
 474
 475     if (!szSource)
 476         return ERROR_INVALID_PARAMETER;
 477
 478     if (dwOptions & MSICODE_PATCH)
 479     {
 480         FIXME("Unhandled options MSICODE_PATCH\n");
 481         return ERROR_FUNCTION_FAILED;
 482     }
 483
 484     if (szUserSid)
 485         FIXME("Unhandled UserSid %s\n",debugstr_w(szUserSid));
 486
 487     if (dwContext == MSIINSTALLCONTEXT_USERUNMANAGED)
 488         FIXME("Unknown context MSIINSTALLCONTEXT_USERUNMANAGED\n");
 489
 490     if (dwContext == MSIINSTALLCONTEXT_MACHINE)
 491         rc = OpenSourceKey(szProduct, &sourcekey, FALSE, TRUE);
 492     else
 493         rc = OpenSourceKey(szProduct, &sourcekey, TRUE, TRUE);
 494
 495     if (rc != ERROR_SUCCESS)
 496         return ERROR_UNKNOWN_PRODUCT;
 497
 498     if (dwOptions & MSISOURCETYPE_NETWORK)
 499         rc = OpenNetworkSubkey(sourcekey, &typekey, TRUE);
 500     else if (dwOptions & MSISOURCETYPE_URL)
 501         rc = OpenURLSubkey(sourcekey, &typekey, TRUE);
 502     else if (dwOptions & MSISOURCETYPE_MEDIA)
 503         rc = OpenMediaSubkey(sourcekey, &typekey, TRUE);
 504     else
 505     {
 506         ERR("unknown media type: %08lx\n", dwOptions);
 507         RegCloseKey(sourcekey);
 508         return ERROR_FUNCTION_FAILED;
 509     }
 510
 511     source_struct.szIndex[0] = 0;
 512     if (find_given_source(typekey, szSource, &source_struct)==ERROR_SUCCESS)
 513     {
 514         DWORD current_index = atoiW(source_struct.szIndex);
 515         /* found the source */
 516         if (dwIndex > 0 && current_index != dwIndex)
 517             FIXME("Need to reorder the sources!\n");
 518     }
 519     else
 520     {
 521         DWORD current_index = 0;
 522         static const WCHAR fmt[] = {'%','i',0};
 523         DWORD size = lstrlenW(szSource)*sizeof(WCHAR);
 524
 525         if (source_struct.szIndex[0])
 526             current_index = atoiW(source_struct.szIndex);
 527         /* new source */
 528         if (dwIndex > 0 && dwIndex < current_index)
 529             FIXME("Need to reorder the sources!\n");
 530
 531         current_index ++;
 532         sprintfW(source_struct.szIndex,fmt,current_index);
 533         rc = RegSetValueExW(typekey, source_struct.szIndex, 0, REG_EXPAND_SZ,
 534                 (LPBYTE)szSource, size);
 535     }
 536
 537     RegCloseKey(typekey);
 538     RegCloseKey(sourcekey);
 539     return rc;
 540 }
 541
 542 /******************************************************************
 543  *  MsiSourceListAddMediaDisk(MSI.@)
 544  */
 545 UINT WINAPI MsiSourceListAddMediaDiskW(LPCWSTR szProduct, LPCWSTR szUserSid,
 546         MSIINSTALLCONTEXT dwContext, DWORD dwOptions, DWORD dwDiskId,
 547         LPCWSTR szVolumeLabel, LPCWSTR szDiskPrompt)
 548 {
 549     HKEY sourcekey;
 550     HKEY mediakey;
 551     UINT rc;
 552     WCHAR szIndex[10];
 553     static const WCHAR fmt[] = {'%','i',0};
 554     static const WCHAR disk_fmt[] = {'%','s',';','%','s',0};
 555     static const WCHAR empty[1] = {0};
 556     LPCWSTR pt1,pt2;
 557     LPWSTR buffer;
 558     DWORD size;
 559
 560     TRACE("%s %s %x %lx %li %s %s\n", debugstr_w(szProduct),
 561             debugstr_w(szUserSid), dwContext, dwOptions, dwDiskId,
 562             debugstr_w(szVolumeLabel), debugstr_w(szDiskPrompt));
 563
 564     if (!szProduct || lstrlenW(szProduct) > 39)
 565         return ERROR_INVALID_PARAMETER;
 566
 567     if (dwOptions & MSICODE_PATCH)
 568     {
 569         FIXME("Unhandled options MSICODE_PATCH\n");
 570         return ERROR_FUNCTION_FAILED;
 571     }
 572
 573     if (szUserSid)
 574         FIXME("Unhandled UserSid %s\n",debugstr_w(szUserSid));
 575
 576     if (dwContext == MSIINSTALLCONTEXT_USERUNMANAGED)
 577         FIXME("Unknown context MSIINSTALLCONTEXT_USERUNMANAGED\n");
 578
 579     if (dwContext == MSIINSTALLCONTEXT_MACHINE)
 580         rc = OpenSourceKey(szProduct, &sourcekey, FALSE, TRUE);
 581     else
 582         rc = OpenSourceKey(szProduct, &sourcekey, TRUE, TRUE);
 583
 584     if (rc != ERROR_SUCCESS)
 585         return ERROR_UNKNOWN_PRODUCT;
 586
 587     OpenMediaSubkey(sourcekey,&mediakey,TRUE);
 588
 589     sprintfW(szIndex,fmt,dwDiskId);
 590
 591     size = 2;
 592     if (szVolumeLabel)
 593     {
 594         size +=lstrlenW(szVolumeLabel);
 595         pt1 = szVolumeLabel;
 596     }
 597     else
 598         pt1 = empty;
 599     if (szDiskPrompt)
 600     {
 601         size +=lstrlenW(szDiskPrompt);
 602         pt2 = szDiskPrompt;
 603     }
 604     else
 605         pt2 = empty;
 606
 607     size *=sizeof(WCHAR);
 608
 609     buffer = msi_alloc(size);
 610     sprintfW(buffer,disk_fmt,pt1,pt2);
 611
 612     RegSetValueExW(mediakey, szIndex, 0, REG_SZ, (LPBYTE)buffer, size);
 613     msi_free( buffer );
 614
 615     RegCloseKey(sourcekey);
 616     RegCloseKey(mediakey);
 617
 618     return ERROR_SUCCESS;
 619 }