reactos/dll/win32/msi/media.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2008 James Hawkins
   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 #include "windef.h"
  24 #include "winerror.h"
  25 #include "wine/debug.h"
  26 #include "fdi.h"
  27 #include "msipriv.h"
  28 #include "winuser.h"
  29 #include "winreg.h"
  30 #include "shlwapi.h"
  31 #include "wine/unicode.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(msi);
  34
  35 /* from msvcrt/fcntl.h */
  36 #define _O_RDONLY      0
  37 #define _O_WRONLY      1
  38 #define _O_RDWR        2
  39 #define _O_ACCMODE     (_O_RDONLY|_O_WRONLY|_O_RDWR)
  40 #define _O_APPEND      0x0008
  41 #define _O_RANDOM      0x0010
  42 #define _O_SEQUENTIAL  0x0020
  43 #define _O_TEMPORARY   0x0040
  44 #define _O_NOINHERIT   0x0080
  45 #define _O_CREAT       0x0100
  46 #define _O_TRUNC       0x0200
  47 #define _O_EXCL        0x0400
  48 #define _O_SHORT_LIVED 0x1000
  49 #define _O_TEXT        0x4000
  50 #define _O_BINARY      0x8000
  51
  52 static BOOL source_matches_volume(MSIMEDIAINFO *mi, LPCWSTR source_root)
  53 {
  54     WCHAR volume_name[MAX_PATH + 1];
  55     WCHAR root[MAX_PATH + 1];
  56
  57     strcpyW(root, source_root);
  58     PathStripToRootW(root);
  59     PathAddBackslashW(root);
  60
  61     if (!GetVolumeInformationW(root, volume_name, MAX_PATH + 1,
  62                                NULL, NULL, NULL, NULL, 0))
  63     {
  64         ERR("Failed to get volume information\n");
  65         return FALSE;
  66     }
  67
  68     return !lstrcmpW(mi->volume_label, volume_name);
  69 }
  70
  71 static UINT msi_change_media(MSIPACKAGE *package, MSIMEDIAINFO *mi)
  72 {
  73     LPSTR msg;
  74     LPWSTR error, error_dialog;
  75     LPWSTR source_dir;
  76     UINT r = ERROR_SUCCESS;
  77
  78     static const WCHAR error_prop[] = {'E','r','r','o','r','D','i','a','l','o','g',0};
  79
  80     if ((msi_get_property_int(package, szUILevel, 0) & INSTALLUILEVEL_MASK) ==
  81          INSTALLUILEVEL_NONE && !gUIHandlerA)
  82         return ERROR_SUCCESS;
  83
  84     error = generate_error_string(package, 1302, 1, mi->disk_prompt);
  85     error_dialog = msi_dup_property(package, error_prop);
  86     source_dir = msi_dup_property(package, cszSourceDir);
  87
  88     while (r == ERROR_SUCCESS &&
  89            !source_matches_volume(mi, source_dir))
  90     {
  91         r = msi_spawn_error_dialog(package, error_dialog, error);
  92
  93         if (gUIHandlerA)
  94         {
  95             msg = strdupWtoA(error);
  96             gUIHandlerA(gUIContext, MB_RETRYCANCEL | INSTALLMESSAGE_ERROR, msg);
  97             msi_free(msg);
  98         }
  99     }
 100
 101     msi_free(error);
 102     msi_free(error_dialog);
 103     msi_free(source_dir);
 104
 105     return r;
 106 }
 107
 108 static UINT writeout_cabinet_stream(MSIPACKAGE *package, LPCWSTR stream,
 109                                     WCHAR* source)
 110 {
 111     UINT rc;
 112     USHORT* data;
 113     UINT size;
 114     DWORD write;
 115     HANDLE hfile;
 116     WCHAR tmp[MAX_PATH];
 117
 118     static const WCHAR cszTempFolder[]= {
 119         'T','e','m','p','F','o','l','d','e','r',0};
 120
 121     rc = read_raw_stream_data(package->db, stream, &data, &size);
 122     if (rc != ERROR_SUCCESS)
 123         return rc;
 124
 125     write = MAX_PATH;
 126     if (MSI_GetPropertyW(package, cszTempFolder, tmp, &write))
 127         GetTempPathW(MAX_PATH, tmp);
 128
 129     GetTempFileNameW(tmp, stream, 0, source);
 130
 131     track_tempfile(package, source);
 132     hfile = CreateFileW(source, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,
 133                         FILE_ATTRIBUTE_NORMAL, NULL);
 134
 135     if (hfile == INVALID_HANDLE_VALUE)
 136     {
 137         ERR("Unable to create file %s\n", debugstr_w(source));
 138         rc = ERROR_FUNCTION_FAILED;
 139         goto end;
 140     }
 141
 142     WriteFile(hfile, data, size, &write, NULL);
 143     CloseHandle(hfile);
 144     TRACE("wrote %i bytes to %s\n", write, debugstr_w(source));
 145
 146 end:
 147     msi_free(data);
 148     return rc;
 149 }
 150
 151 static void * CDECL cabinet_alloc(ULONG cb)
 152 {
 153     return msi_alloc(cb);
 154 }
 155
 156 static void CDECL cabinet_free(void *pv)
 157 {
 158     msi_free(pv);
 159 }
 160
 161 static INT_PTR CDECL cabinet_open(char *pszFile, int oflag, int pmode)
 162 {
 163     HANDLE handle;
 164     DWORD dwAccess = 0;
 165     DWORD dwShareMode = 0;
 166     DWORD dwCreateDisposition = OPEN_EXISTING;
 167
 168     switch (oflag & _O_ACCMODE)
 169     {
 170     case _O_RDONLY:
 171         dwAccess = GENERIC_READ;
 172         dwShareMode = FILE_SHARE_READ | FILE_SHARE_DELETE;
 173         break;
 174     case _O_WRONLY:
 175         dwAccess = GENERIC_WRITE;
 176         dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
 177         break;
 178     case _O_RDWR:
 179         dwAccess = GENERIC_READ | GENERIC_WRITE;
 180         dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
 181         break;
 182     }
 183
 184     if ((oflag & (_O_CREAT | _O_EXCL)) == (_O_CREAT | _O_EXCL))
 185         dwCreateDisposition = CREATE_NEW;
 186     else if (oflag & _O_CREAT)
 187         dwCreateDisposition = CREATE_ALWAYS;
 188
 189     handle = CreateFileA(pszFile, dwAccess, dwShareMode, NULL,
 190                          dwCreateDisposition, 0, NULL);
 191     if (handle == INVALID_HANDLE_VALUE)
 192         return 0;
 193
 194     return (INT_PTR)handle;
 195 }
 196
 197 static UINT CDECL cabinet_read(INT_PTR hf, void *pv, UINT cb)
 198 {
 199     HANDLE handle = (HANDLE)hf;
 200     DWORD read;
 201
 202     if (ReadFile(handle, pv, cb, &read, NULL))
 203         return read;
 204
 205     return 0;
 206 }
 207
 208 static UINT CDECL cabinet_write(INT_PTR hf, void *pv, UINT cb)
 209 {
 210     HANDLE handle = (HANDLE)hf;
 211     DWORD written;
 212
 213     if (WriteFile(handle, pv, cb, &written, NULL))
 214         return written;
 215
 216     return 0;
 217 }
 218
 219 static int CDECL cabinet_close(INT_PTR hf)
 220 {
 221     HANDLE handle = (HANDLE)hf;
 222     return CloseHandle(handle) ? 0 : -1;
 223 }
 224
 225 static LONG CDECL cabinet_seek(INT_PTR hf, LONG dist, int seektype)
 226 {
 227     HANDLE handle = (HANDLE)hf;
 228     /* flags are compatible and so are passed straight through */
 229     return SetFilePointer(handle, dist, NULL, seektype);
 230 }
 231
 232 static UINT CDECL msi_media_get_disk_info(MSIPACKAGE *package, MSIMEDIAINFO *mi)
 233 {
 234     MSIRECORD *row;
 235     LPWSTR ptr;
 236
 237     static const WCHAR query[] = {
 238         'S','E','L','E','C','T',' ','*',' ', 'F','R','O','M',' ',
 239         '`','M','e','d','i','a','`',' ','W','H','E','R','E',' ',
 240         '`','D','i','s','k','I','d','`',' ','=',' ','%','i',0};
 241
 242     row = MSI_QueryGetRecord(package->db, query, mi->disk_id);
 243     if (!row)
 244     {
 245         TRACE("Unable to query row\n");
 246         return ERROR_FUNCTION_FAILED;
 247     }
 248
 249     mi->disk_prompt = strdupW(MSI_RecordGetString(row, 3));
 250     mi->cabinet = strdupW(MSI_RecordGetString(row, 4));
 251     mi->volume_label = strdupW(MSI_RecordGetString(row, 5));
 252
 253     if (!mi->first_volume)
 254         mi->first_volume = strdupW(mi->volume_label);
 255
 256     ptr = strrchrW(mi->source, '\\') + 1;
 257     lstrcpyW(ptr, mi->cabinet);
 258     msiobj_release(&row->hdr);
 259
 260     return ERROR_SUCCESS;
 261 }
 262
 263 static INT_PTR cabinet_partial_file(FDINOTIFICATIONTYPE fdint,
 264                                     PFDINOTIFICATION pfdin)
 265 {
 266     MSICABDATA *data = pfdin->pv;
 267     data->mi->is_continuous = FALSE;
 268     return 0;
 269 }
 270
 271 static INT_PTR cabinet_next_cabinet(FDINOTIFICATIONTYPE fdint,
 272                                     PFDINOTIFICATION pfdin)
 273 {
 274     MSICABDATA *data = pfdin->pv;
 275     MSIMEDIAINFO *mi = data->mi;
 276     LPWSTR cab = strdupAtoW(pfdin->psz1);
 277     INT_PTR res = -1;
 278     UINT rc;
 279
 280     msi_free(mi->disk_prompt);
 281     msi_free(mi->cabinet);
 282     msi_free(mi->volume_label);
 283     mi->disk_prompt = NULL;
 284     mi->cabinet = NULL;
 285     mi->volume_label = NULL;
 286
 287     mi->disk_id++;
 288     mi->is_continuous = TRUE;
 289
 290     rc = msi_media_get_disk_info(data->package, mi);
 291     if (rc != ERROR_SUCCESS)
 292     {
 293         ERR("Failed to get next cabinet information: %d\n", rc);
 294         goto done;
 295     }
 296
 297     if (lstrcmpiW(mi->cabinet, cab))
 298     {
 299         ERR("Continuous cabinet does not match the next cabinet in the Media table\n");
 300         goto done;
 301     }
 302
 303     TRACE("Searching for %s\n", debugstr_w(mi->source));
 304
 305     res = 0;
 306     if (GetFileAttributesW(mi->source) == INVALID_FILE_ATTRIBUTES)
 307     {
 308         if (msi_change_media(data->package, mi) != ERROR_SUCCESS)
 309             res = -1;
 310     }
 311
 312 done:
 313     msi_free(cab);
 314     return res;
 315 }
 316
 317 static INT_PTR cabinet_copy_file(FDINOTIFICATIONTYPE fdint,
 318                                  PFDINOTIFICATION pfdin)
 319 {
 320     MSICABDATA *data = pfdin->pv;
 321     HANDLE handle = 0;
 322     LPWSTR path = NULL;
 323     DWORD attrs;
 324
 325     data->curfile = strdupAtoW(pfdin->psz1);
 326     if (!data->cb(data->package, data->curfile, MSICABEXTRACT_BEGINEXTRACT, &path,
 327                   &attrs, data->user))
 328         goto done;
 329
 330     TRACE("extracting %s\n", debugstr_w(path));
 331
 332     attrs = attrs & (FILE_ATTRIBUTE_READONLY|FILE_ATTRIBUTE_HIDDEN|FILE_ATTRIBUTE_SYSTEM);
 333     if (!attrs) attrs = FILE_ATTRIBUTE_NORMAL;
 334
 335     handle = CreateFileW(path, GENERIC_READ | GENERIC_WRITE, 0,
 336                          NULL, CREATE_ALWAYS, attrs, NULL);
 337     if (handle == INVALID_HANDLE_VALUE)
 338     {
 339         DWORD err = GetLastError();
 340         DWORD attrs2 = GetFileAttributesW(path);
 341
 342         if (attrs2 == INVALID_FILE_ATTRIBUTES)
 343         {
 344             ERR("failed to create %s (error %d)\n", debugstr_w(path), err);
 345             goto done;
 346         }
 347         else if (err == ERROR_ACCESS_DENIED && (attrs2 & FILE_ATTRIBUTE_READONLY))
 348         {
 349             TRACE("removing read-only attribute on %s\n", debugstr_w(path));
 350             SetFileAttributesW( path, attrs2 & ~FILE_ATTRIBUTE_READONLY );
 351             handle = CreateFileW(path, GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, attrs2, NULL);
 352
 353             if (handle != INVALID_HANDLE_VALUE) goto done;
 354             err = GetLastError();
 355         }
 356         if ((err == ERROR_SHARING_VIOLATION) || (err == ERROR_USER_MAPPED_FILE))
 357         {
 358             WCHAR tmpfileW[MAX_PATH], *tmppathW, *p;
 359             DWORD len;
 360
 361             TRACE("file in use, scheduling rename operation\n");
 362
 363             GetTempFileNameW(szBackSlash, szMsi, 0, tmpfileW);
 364             len = strlenW(path) + strlenW(tmpfileW) + 1;
 365             if (!(tmppathW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR))))
 366                 return ERROR_OUTOFMEMORY;
 367
 368             strcpyW(tmppathW, path);
 369             if ((p = strrchrW(tmppathW, '\\'))) *p = 0;
 370             strcatW(tmppathW, tmpfileW);
 371
 372             handle = CreateFileW(tmppathW, GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, attrs, NULL);
 373
 374             if (handle != INVALID_HANDLE_VALUE &&
 375                 MoveFileExW(path, NULL, MOVEFILE_DELAY_UNTIL_REBOOT) &&
 376                 MoveFileExW(tmppathW, path, MOVEFILE_DELAY_UNTIL_REBOOT))
 377             {
 378                 data->package->need_reboot = 1;
 379             }
 380             else
 381                 WARN("failed to schedule rename operation %s (error %d)\n", debugstr_w(path), GetLastError());
 382
 383             HeapFree(GetProcessHeap(), 0, tmppathW);
 384         }
 385         else
 386             WARN("failed to create %s (error %d)\n", debugstr_w(path), err);
 387     }
 388
 389 done:
 390     msi_free(path);
 391
 392     return (INT_PTR)handle;
 393 }
 394
 395 static INT_PTR cabinet_close_file_info(FDINOTIFICATIONTYPE fdint,
 396                                        PFDINOTIFICATION pfdin)
 397 {
 398     MSICABDATA *data = pfdin->pv;
 399     FILETIME ft;
 400     FILETIME ftLocal;
 401     HANDLE handle = (HANDLE)pfdin->hf;
 402
 403     data->mi->is_continuous = FALSE;
 404
 405     if (!DosDateTimeToFileTime(pfdin->date, pfdin->time, &ft))
 406         return -1;
 407     if (!LocalFileTimeToFileTime(&ft, &ftLocal))
 408         return -1;
 409     if (!SetFileTime(handle, &ftLocal, 0, &ftLocal))
 410         return -1;
 411
 412     CloseHandle(handle);
 413
 414     data->cb(data->package, data->curfile, MSICABEXTRACT_FILEEXTRACTED, NULL, NULL,
 415              data->user);
 416
 417     msi_free(data->curfile);
 418     data->curfile = NULL;
 419
 420     return 1;
 421 }
 422
 423 static INT_PTR CDECL cabinet_notify(FDINOTIFICATIONTYPE fdint, PFDINOTIFICATION pfdin)
 424 {
 425     TRACE("(%d)\n", fdint);
 426
 427     switch (fdint)
 428     {
 429     case fdintPARTIAL_FILE:
 430         return cabinet_partial_file(fdint, pfdin);
 431
 432     case fdintNEXT_CABINET:
 433         return cabinet_next_cabinet(fdint, pfdin);
 434
 435     case fdintCOPY_FILE:
 436         return cabinet_copy_file(fdint, pfdin);
 437
 438     case fdintCLOSE_FILE_INFO:
 439         return cabinet_close_file_info(fdint, pfdin);
 440
 441     default:
 442         return 0;
 443     }
 444 }
 445
 446 /***********************************************************************
 447  *            msi_cabextract
 448  *
 449  * Extract files from a cab file.
 450  */
 451 BOOL msi_cabextract(MSIPACKAGE* package, MSIMEDIAINFO *mi, LPVOID data)
 452 {
 453     LPSTR cabinet, cab_path = NULL;
 454     LPWSTR ptr;
 455     HFDI hfdi;
 456     ERF erf;
 457     BOOL ret = FALSE;
 458
 459     TRACE("Extracting %s\n", debugstr_w(mi->source));
 460
 461     hfdi = FDICreate(cabinet_alloc, cabinet_free, cabinet_open, cabinet_read,
 462                      cabinet_write, cabinet_close, cabinet_seek, 0, &erf);
 463     if (!hfdi)
 464     {
 465         ERR("FDICreate failed\n");
 466         return FALSE;
 467     }
 468
 469     ptr = strrchrW(mi->source, '\\') + 1;
 470     cabinet = strdupWtoA(ptr);
 471     if (!cabinet)
 472         goto done;
 473
 474     cab_path = strdupWtoA(mi->source);
 475     if (!cab_path)
 476         goto done;
 477
 478     cab_path[ptr - mi->source] = '\0';
 479
 480     ret = FDICopy(hfdi, cabinet, cab_path, 0, cabinet_notify, NULL, data);
 481     if (!ret)
 482         ERR("FDICopy failed\n");
 483
 484 done:
 485     FDIDestroy(hfdi);
 486     msi_free(cabinet);
 487     msi_free(cab_path);
 488
 489     if (ret)
 490         mi->is_extracted = TRUE;
 491
 492     return ret;
 493 }
 494
 495 void msi_free_media_info(MSIMEDIAINFO *mi)
 496 {
 497     msi_free(mi->disk_prompt);
 498     msi_free(mi->cabinet);
 499     msi_free(mi->volume_label);
 500     msi_free(mi->first_volume);
 501     msi_free(mi);
 502 }
 503
 504 static UINT get_drive_type(const WCHAR *path)
 505 {
 506     WCHAR root[MAX_PATH + 1];
 507
 508     strcpyW(root, path);
 509     PathStripToRootW(root);
 510     PathAddBackslashW(root);
 511
 512     return GetDriveTypeW(root);
 513 }
 514
 515 static UINT msi_load_media_info(MSIPACKAGE *package, MSIFILE *file, MSIMEDIAINFO *mi)
 516 {
 517     MSIRECORD *row;
 518     LPWSTR source_dir;
 519     LPWSTR source;
 520     DWORD options;
 521     UINT r;
 522
 523     static const WCHAR query[] = {
 524         'S','E','L','E','C','T',' ','*',' ', 'F','R','O','M',' ',
 525         '`','M','e','d','i','a','`',' ','W','H','E','R','E',' ',
 526         '`','L','a','s','t','S','e','q','u','e','n','c','e','`',' ','>','=',
 527         ' ','%','i',' ','A','N','D',' ','`','D','i','s','k','I','d','`',' ','>','=',
 528         ' ','%','i',' ','O','R','D','E','R',' ','B','Y',' ',
 529         '`','D','i','s','k','I','d','`',0};
 530
 531     row = MSI_QueryGetRecord(package->db, query, file->Sequence, mi->disk_id);
 532     if (!row)
 533     {
 534         TRACE("Unable to query row\n");
 535         return ERROR_FUNCTION_FAILED;
 536     }
 537
 538     mi->is_extracted = FALSE;
 539     mi->disk_id = MSI_RecordGetInteger(row, 1);
 540     mi->last_sequence = MSI_RecordGetInteger(row, 2);
 541     msi_free(mi->disk_prompt);
 542     mi->disk_prompt = strdupW(MSI_RecordGetString(row, 3));
 543     msi_free(mi->cabinet);
 544     mi->cabinet = strdupW(MSI_RecordGetString(row, 4));
 545     msi_free(mi->volume_label);
 546     mi->volume_label = strdupW(MSI_RecordGetString(row, 5));
 547     msiobj_release(&row->hdr);
 548
 549     if (!mi->first_volume)
 550         mi->first_volume = strdupW(mi->volume_label);
 551
 552     source_dir = msi_dup_property(package, cszSourceDir);
 553     lstrcpyW(mi->source, source_dir);
 554     mi->type = get_drive_type(source_dir);
 555
 556     if (file->IsCompressed && mi->cabinet)
 557     {
 558         if (mi->cabinet[0] == '#')
 559         {
 560             r = writeout_cabinet_stream(package, &mi->cabinet[1], mi->source);
 561             if (r != ERROR_SUCCESS)
 562             {
 563                 ERR("Failed to extract cabinet stream\n");
 564                 return ERROR_FUNCTION_FAILED;
 565             }
 566         }
 567         else
 568             lstrcatW(mi->source, mi->cabinet);
 569     }
 570
 571     options = MSICODE_PRODUCT;
 572     if (mi->type == DRIVE_CDROM || mi->type == DRIVE_REMOVABLE)
 573     {
 574         source = source_dir;
 575         options |= MSISOURCETYPE_MEDIA;
 576     }
 577     else if (package->BaseURL && UrlIsW(package->BaseURL, URLIS_URL))
 578     {
 579         source = package->BaseURL;
 580         options |= MSISOURCETYPE_URL;
 581     }
 582     else
 583     {
 584         source = mi->source;
 585         options |= MSISOURCETYPE_NETWORK;
 586     }
 587
 588     msi_package_add_media_disk(package, package->Context,
 589                                MSICODE_PRODUCT, mi->disk_id,
 590                                mi->volume_label, mi->disk_prompt);
 591
 592     msi_package_add_info(package, package->Context,
 593                          options, INSTALLPROPERTY_LASTUSEDSOURCEW, source);
 594
 595     msi_free(source_dir);
 596     return ERROR_SUCCESS;
 597 }
 598
 599 /* FIXME: search NETWORK and URL sources as well */
 600 static UINT find_published_source(MSIPACKAGE *package, MSIMEDIAINFO *mi)
 601 {
 602     WCHAR source[MAX_PATH];
 603     WCHAR volume[MAX_PATH];
 604     WCHAR prompt[MAX_PATH];
 605     DWORD volumesz, promptsz;
 606     DWORD index, size, id;
 607     UINT r;
 608
 609     size = MAX_PATH;
 610     r = MsiSourceListGetInfoW(package->ProductCode, NULL,
 611                               package->Context, MSICODE_PRODUCT,
 612                               INSTALLPROPERTY_LASTUSEDSOURCEW, source, &size);
 613     if (r != ERROR_SUCCESS)
 614         return r;
 615
 616     index = 0;
 617     volumesz = MAX_PATH;
 618     promptsz = MAX_PATH;
 619     while (MsiSourceListEnumMediaDisksW(package->ProductCode, NULL,
 620                                         package->Context,
 621                                         MSICODE_PRODUCT, index++, &id,
 622                                         volume, &volumesz, prompt, &promptsz) == ERROR_SUCCESS)
 623     {
 624         mi->disk_id = id;
 625         mi->volume_label = msi_realloc(mi->volume_label, ++volumesz * sizeof(WCHAR));
 626         lstrcpyW(mi->volume_label, volume);
 627         mi->disk_prompt = msi_realloc(mi->disk_prompt, ++promptsz * sizeof(WCHAR));
 628         lstrcpyW(mi->disk_prompt, prompt);
 629
 630         if (source_matches_volume(mi, source))
 631         {
 632             /* FIXME: what about SourceDir */
 633             lstrcpyW(mi->source, source);
 634             return ERROR_SUCCESS;
 635         }
 636     }
 637
 638     return ERROR_FUNCTION_FAILED;
 639 }
 640
 641 UINT ready_media(MSIPACKAGE *package, MSIFILE *file, MSIMEDIAINFO *mi)
 642 {
 643     UINT rc = ERROR_SUCCESS;
 644
 645     /* media info for continuous cabinet is already loaded */
 646     if (mi->is_continuous)
 647         return ERROR_SUCCESS;
 648
 649     rc = msi_load_media_info(package, file, mi);
 650     if (rc != ERROR_SUCCESS)
 651     {
 652         ERR("Unable to load media info\n");
 653         return ERROR_FUNCTION_FAILED;
 654     }
 655
 656     /* cabinet is internal, no checks needed */
 657     if (!mi->cabinet || mi->cabinet[0] == '#')
 658         return ERROR_SUCCESS;
 659
 660     /* package should be downloaded */
 661     if (file->IsCompressed &&
 662         GetFileAttributesW(mi->source) == INVALID_FILE_ATTRIBUTES &&
 663         package->BaseURL && UrlIsW(package->BaseURL, URLIS_URL))
 664     {
 665         WCHAR temppath[MAX_PATH];
 666
 667         msi_download_file(mi->source, temppath);
 668         lstrcpyW(mi->source, temppath);
 669         return ERROR_SUCCESS;
 670     }
 671
 672     /* check volume matches, change media if not */
 673     if (mi->volume_label && mi->disk_id > 1 &&
 674         lstrcmpW(mi->first_volume, mi->volume_label))
 675     {
 676         LPWSTR source = msi_dup_property(package, cszSourceDir);
 677         BOOL matches;
 678
 679         matches = source_matches_volume(mi, source);
 680         msi_free(source);
 681
 682         if ((mi->type == DRIVE_CDROM || mi->type == DRIVE_REMOVABLE) && !matches)
 683         {
 684             rc = msi_change_media(package, mi);
 685             if (rc != ERROR_SUCCESS)
 686                 return rc;
 687         }
 688     }
 689
 690     if (file->IsCompressed &&
 691         GetFileAttributesW(mi->source) == INVALID_FILE_ATTRIBUTES)
 692     {
 693         rc = find_published_source(package, mi);
 694         if (rc != ERROR_SUCCESS)
 695         {
 696             ERR("Cabinet not found: %s\n", debugstr_w(mi->source));
 697             return ERROR_INSTALL_FAILURE;
 698         }
 699     }
 700
 701     return ERROR_SUCCESS;
 702 }