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 szUILevel[] = {'U','I','L','e','v','e','l',0};
  79     static const WCHAR error_prop[] = {'E','r','r','o','r','D','i','a','l','o','g',0};
  80
  81     if ((msi_get_property_int(package, szUILevel, 0) & INSTALLUILEVEL_MASK) ==
  82          INSTALLUILEVEL_NONE && !gUIHandlerA)
  83         return ERROR_SUCCESS;
  84
  85     error = generate_error_string(package, 1302, 1, mi->disk_prompt);
  86     error_dialog = msi_dup_property(package, error_prop);
  87     source_dir = msi_dup_property(package, cszSourceDir);
  88
  89     while (r == ERROR_SUCCESS &&
  90            !source_matches_volume(mi, source_dir))
  91     {
  92         r = msi_spawn_error_dialog(package, error_dialog, error);
  93
  94         if (gUIHandlerA)
  95         {
  96             msg = strdupWtoA(error);
  97             gUIHandlerA(gUIContext, MB_RETRYCANCEL | INSTALLMESSAGE_ERROR, msg);
  98             msi_free(msg);
  99         }
 100     }
 101
 102     msi_free(error);
 103     msi_free(error_dialog);
 104     msi_free(source_dir);
 105
 106     return r;
 107 }
 108
 109 static UINT writeout_cabinet_stream(MSIPACKAGE *package, LPCWSTR stream,
 110                                     WCHAR* source)
 111 {
 112     UINT rc;
 113     USHORT* data;
 114     UINT size;
 115     DWORD write;
 116     HANDLE hfile;
 117     WCHAR tmp[MAX_PATH];
 118
 119     static const WCHAR cszTempFolder[]= {
 120         'T','e','m','p','F','o','l','d','e','r',0};
 121
 122     rc = read_raw_stream_data(package->db, stream, &data, &size);
 123     if (rc != ERROR_SUCCESS)
 124         return rc;
 125
 126     write = MAX_PATH;
 127     if (MSI_GetPropertyW(package, cszTempFolder, tmp, &write))
 128         GetTempPathW(MAX_PATH, tmp);
 129
 130     GetTempFileNameW(tmp, stream, 0, source);
 131
 132     track_tempfile(package, source);
 133     hfile = CreateFileW(source, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,
 134                         FILE_ATTRIBUTE_NORMAL, NULL);
 135
 136     if (hfile == INVALID_HANDLE_VALUE)
 137     {
 138         ERR("Unable to create file %s\n", debugstr_w(source));
 139         rc = ERROR_FUNCTION_FAILED;
 140         goto end;
 141     }
 142
 143     WriteFile(hfile, data, size, &write, NULL);
 144     CloseHandle(hfile);
 145     TRACE("wrote %i bytes to %s\n", write, debugstr_w(source));
 146
 147 end:
 148     msi_free(data);
 149     return rc;
 150 }
 151
 152 static void * CDECL cabinet_alloc(ULONG cb)
 153 {
 154     return msi_alloc(cb);
 155 }
 156
 157 static void CDECL cabinet_free(void *pv)
 158 {
 159     msi_free(pv);
 160 }
 161
 162 static INT_PTR CDECL cabinet_open(char *pszFile, int oflag, int pmode)
 163 {
 164     HANDLE handle;
 165     DWORD dwAccess = 0;
 166     DWORD dwShareMode = 0;
 167     DWORD dwCreateDisposition = OPEN_EXISTING;
 168
 169     switch (oflag & _O_ACCMODE)
 170     {
 171     case _O_RDONLY:
 172         dwAccess = GENERIC_READ;
 173         dwShareMode = FILE_SHARE_READ | FILE_SHARE_DELETE;
 174         break;
 175     case _O_WRONLY:
 176         dwAccess = GENERIC_WRITE;
 177         dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
 178         break;
 179     case _O_RDWR:
 180         dwAccess = GENERIC_READ | GENERIC_WRITE;
 181         dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
 182         break;
 183     }
 184
 185     if ((oflag & (_O_CREAT | _O_EXCL)) == (_O_CREAT | _O_EXCL))
 186         dwCreateDisposition = CREATE_NEW;
 187     else if (oflag & _O_CREAT)
 188         dwCreateDisposition = CREATE_ALWAYS;
 189
 190     handle = CreateFileA(pszFile, dwAccess, dwShareMode, NULL,
 191                          dwCreateDisposition, 0, NULL);
 192     if (handle == INVALID_HANDLE_VALUE)
 193         return 0;
 194
 195     return (INT_PTR)handle;
 196 }
 197
 198 static UINT CDECL cabinet_read(INT_PTR hf, void *pv, UINT cb)
 199 {
 200     HANDLE handle = (HANDLE)hf;
 201     DWORD read;
 202
 203     if (ReadFile(handle, pv, cb, &read, NULL))
 204         return read;
 205
 206     return 0;
 207 }
 208
 209 static UINT CDECL cabinet_write(INT_PTR hf, void *pv, UINT cb)
 210 {
 211     HANDLE handle = (HANDLE)hf;
 212     DWORD written;
 213
 214     if (WriteFile(handle, pv, cb, &written, NULL))
 215         return written;
 216
 217     return 0;
 218 }
 219
 220 static int CDECL cabinet_close(INT_PTR hf)
 221 {
 222     HANDLE handle = (HANDLE)hf;
 223     return CloseHandle(handle) ? 0 : -1;
 224 }
 225
 226 static LONG CDECL cabinet_seek(INT_PTR hf, LONG dist, int seektype)
 227 {
 228     HANDLE handle = (HANDLE)hf;
 229     /* flags are compatible and so are passed straight through */
 230     return SetFilePointer(handle, dist, NULL, seektype);
 231 }
 232
 233 static UINT CDECL msi_media_get_disk_info(MSIPACKAGE *package, MSIMEDIAINFO *mi)
 234 {
 235     MSIRECORD *row;
 236     LPWSTR ptr;
 237
 238     static const WCHAR query[] = {
 239         'S','E','L','E','C','T',' ','*',' ', 'F','R','O','M',' ',
 240         '`','M','e','d','i','a','`',' ','W','H','E','R','E',' ',
 241         '`','D','i','s','k','I','d','`',' ','=',' ','%','i',0};
 242
 243     row = MSI_QueryGetRecord(package->db, query, mi->disk_id);
 244     if (!row)
 245     {
 246         TRACE("Unable to query row\n");
 247         return ERROR_FUNCTION_FAILED;
 248     }
 249
 250     mi->disk_prompt = strdupW(MSI_RecordGetString(row, 3));
 251     mi->cabinet = strdupW(MSI_RecordGetString(row, 4));
 252     mi->volume_label = strdupW(MSI_RecordGetString(row, 5));
 253
 254     if (!mi->first_volume)
 255         mi->first_volume = strdupW(mi->volume_label);
 256
 257     ptr = strrchrW(mi->source, '\\') + 1;
 258     lstrcpyW(ptr, mi->cabinet);
 259     msiobj_release(&row->hdr);
 260
 261     return ERROR_SUCCESS;
 262 }
 263
 264 static INT_PTR cabinet_partial_file(FDINOTIFICATIONTYPE fdint,
 265                                     PFDINOTIFICATION pfdin)
 266 {
 267     MSICABDATA *data = pfdin->pv;
 268     data->mi->is_continuous = FALSE;
 269     return 0;
 270 }
 271
 272 static INT_PTR cabinet_next_cabinet(FDINOTIFICATIONTYPE fdint,
 273                                     PFDINOTIFICATION pfdin)
 274 {
 275     MSICABDATA *data = pfdin->pv;
 276     MSIMEDIAINFO *mi = data->mi;
 277     LPWSTR cab = strdupAtoW(pfdin->psz1);
 278     INT_PTR res = -1;
 279     UINT rc;
 280
 281     msi_free(mi->disk_prompt);
 282     msi_free(mi->cabinet);
 283     msi_free(mi->volume_label);
 284     mi->disk_prompt = NULL;
 285     mi->cabinet = NULL;
 286     mi->volume_label = NULL;
 287
 288     mi->disk_id++;
 289     mi->is_continuous = TRUE;
 290
 291     rc = msi_media_get_disk_info(data->package, mi);
 292     if (rc != ERROR_SUCCESS)
 293     {
 294         ERR("Failed to get next cabinet information: %d\n", rc);
 295         goto done;
 296     }
 297
 298     if (lstrcmpiW(mi->cabinet, cab))
 299     {
 300         ERR("Continuous cabinet does not match the next cabinet in the Media table\n");
 301         goto done;
 302     }
 303
 304     TRACE("Searching for %s\n", debugstr_w(mi->source));
 305
 306     res = 0;
 307     if (GetFileAttributesW(mi->source) == INVALID_FILE_ATTRIBUTES)
 308     {
 309         if (msi_change_media(data->package, mi) != ERROR_SUCCESS)
 310             res = -1;
 311     }
 312
 313 done:
 314     msi_free(cab);
 315     return res;
 316 }
 317
 318 static INT_PTR cabinet_copy_file(FDINOTIFICATIONTYPE fdint,
 319                                  PFDINOTIFICATION pfdin)
 320 {
 321     MSICABDATA *data = pfdin->pv;
 322     HANDLE handle = 0;
 323     LPWSTR path = NULL;
 324     DWORD attrs;
 325
 326     data->curfile = strdupAtoW(pfdin->psz1);
 327     if (!data->cb(data->package, data->curfile, MSICABEXTRACT_BEGINEXTRACT, &path,
 328                   &attrs, data->user))
 329         goto done;
 330
 331     TRACE("extracting %s\n", debugstr_w(path));
 332
 333     attrs = attrs & (FILE_ATTRIBUTE_READONLY|FILE_ATTRIBUTE_HIDDEN|FILE_ATTRIBUTE_SYSTEM);
 334     if (!attrs) attrs = FILE_ATTRIBUTE_NORMAL;
 335
 336     handle = CreateFileW(path, GENERIC_READ | GENERIC_WRITE, 0,
 337                          NULL, CREATE_ALWAYS, attrs, NULL);
 338     if (handle == INVALID_HANDLE_VALUE)
 339     {
 340         DWORD err = GetLastError();
 341         DWORD attrs2 = GetFileAttributesW(path);
 342
 343         if (attrs2 == INVALID_FILE_ATTRIBUTES)
 344         {
 345             ERR("failed to create %s (error %d)\n", debugstr_w(path), err);
 346             goto done;
 347         }
 348         else if (err == ERROR_ACCESS_DENIED && (attrs2 & FILE_ATTRIBUTE_READONLY))
 349         {
 350             TRACE("removing read-only attribute on %s\n", debugstr_w(path));
 351             SetFileAttributesW( path, attrs2 & ~FILE_ATTRIBUTE_READONLY );
 352             handle = CreateFileW(path, GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, attrs2, NULL);
 353
 354             if (handle != INVALID_HANDLE_VALUE) goto done;
 355             err = GetLastError();
 356         }
 357         if (err == ERROR_SHARING_VIOLATION)
 358         {
 359             static const WCHAR msiW[] = {'m','s','i',0};
 360             static const WCHAR slashW[] = {'\\',0};
 361             WCHAR tmpfileW[MAX_PATH], *tmppathW, *p;
 362             DWORD len;
 363
 364             TRACE("file in use, scheduling rename operation\n");
 365
 366             GetTempFileNameW(slashW, msiW, 0, tmpfileW);
 367             len = strlenW(path) + strlenW(tmpfileW) + 1;
 368             if (!(tmppathW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR))))
 369                 return ERROR_OUTOFMEMORY;
 370
 371             strcpyW(tmppathW, path);
 372             if ((p = strrchrW(tmppathW, '\\'))) *p = 0;
 373             strcatW(tmppathW, tmpfileW);
 374
 375             handle = CreateFileW(tmppathW, GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, attrs, NULL);
 376
 377             if (handle != INVALID_HANDLE_VALUE &&
 378                 MoveFileExW(path, NULL, MOVEFILE_DELAY_UNTIL_REBOOT) &&
 379                 MoveFileExW(tmppathW, path, MOVEFILE_DELAY_UNTIL_REBOOT))
 380             {
 381                 data->package->need_reboot = 1;
 382             }
 383             else
 384                 WARN("failed to schedule rename operation %s (error %d)\n", debugstr_w(path), GetLastError());
 385
 386             HeapFree(GetProcessHeap(), 0, tmppathW);
 387         }
 388         else
 389             WARN("failed to create %s (error %d)\n", debugstr_w(path), err);
 390     }
 391
 392 done:
 393     msi_free(path);
 394
 395     return (INT_PTR)handle;
 396 }
 397
 398 static INT_PTR cabinet_close_file_info(FDINOTIFICATIONTYPE fdint,
 399                                        PFDINOTIFICATION pfdin)
 400 {
 401     MSICABDATA *data = pfdin->pv;
 402     FILETIME ft;
 403     FILETIME ftLocal;
 404     HANDLE handle = (HANDLE)pfdin->hf;
 405
 406     data->mi->is_continuous = FALSE;
 407
 408     if (!DosDateTimeToFileTime(pfdin->date, pfdin->time, &ft))
 409         return -1;
 410     if (!LocalFileTimeToFileTime(&ft, &ftLocal))
 411         return -1;
 412     if (!SetFileTime(handle, &ftLocal, 0, &ftLocal))
 413         return -1;
 414
 415     CloseHandle(handle);
 416
 417     data->cb(data->package, data->curfile, MSICABEXTRACT_FILEEXTRACTED, NULL, NULL,
 418              data->user);
 419
 420     msi_free(data->curfile);
 421     data->curfile = NULL;
 422
 423     return 1;
 424 }
 425
 426 static INT_PTR CDECL cabinet_notify(FDINOTIFICATIONTYPE fdint, PFDINOTIFICATION pfdin)
 427 {
 428     TRACE("(%d)\n", fdint);
 429
 430     switch (fdint)
 431     {
 432     case fdintPARTIAL_FILE:
 433         return cabinet_partial_file(fdint, pfdin);
 434
 435     case fdintNEXT_CABINET:
 436         return cabinet_next_cabinet(fdint, pfdin);
 437
 438     case fdintCOPY_FILE:
 439         return cabinet_copy_file(fdint, pfdin);
 440
 441     case fdintCLOSE_FILE_INFO:
 442         return cabinet_close_file_info(fdint, pfdin);
 443
 444     default:
 445         return 0;
 446     }
 447 }
 448
 449 /***********************************************************************
 450  *            msi_cabextract
 451  *
 452  * Extract files from a cab file.
 453  */
 454 BOOL msi_cabextract(MSIPACKAGE* package, MSIMEDIAINFO *mi, LPVOID data)
 455 {
 456     LPSTR cabinet, cab_path = NULL;
 457     LPWSTR ptr;
 458     HFDI hfdi;
 459     ERF erf;
 460     BOOL ret = FALSE;
 461
 462     TRACE("Extracting %s\n", debugstr_w(mi->source));
 463
 464     hfdi = FDICreate(cabinet_alloc, cabinet_free, cabinet_open, cabinet_read,
 465                      cabinet_write, cabinet_close, cabinet_seek, 0, &erf);
 466     if (!hfdi)
 467     {
 468         ERR("FDICreate failed\n");
 469         return FALSE;
 470     }
 471
 472     ptr = strrchrW(mi->source, '\\') + 1;
 473     cabinet = strdupWtoA(ptr);
 474     if (!cabinet)
 475         goto done;
 476
 477     cab_path = strdupWtoA(mi->source);
 478     if (!cab_path)
 479         goto done;
 480
 481     cab_path[ptr - mi->source] = '\0';
 482
 483     ret = FDICopy(hfdi, cabinet, cab_path, 0, cabinet_notify, NULL, data);
 484     if (!ret)
 485         ERR("FDICopy failed\n");
 486
 487 done:
 488     FDIDestroy(hfdi);
 489     msi_free(cabinet);
 490     msi_free(cab_path);
 491
 492     if (ret)
 493         mi->is_extracted = TRUE;
 494
 495     return ret;
 496 }
 497
 498 void msi_free_media_info(MSIMEDIAINFO *mi)
 499 {
 500     msi_free(mi->disk_prompt);
 501     msi_free(mi->cabinet);
 502     msi_free(mi->volume_label);
 503     msi_free(mi->first_volume);
 504     msi_free(mi);
 505 }
 506
 507 static UINT get_drive_type(const WCHAR *path)
 508 {
 509     WCHAR root[MAX_PATH + 1];
 510
 511     strcpyW(root, path);
 512     PathStripToRootW(root);
 513     PathAddBackslashW(root);
 514
 515     return GetDriveTypeW(root);
 516 }
 517
 518 static UINT msi_load_media_info(MSIPACKAGE *package, MSIFILE *file, MSIMEDIAINFO *mi)
 519 {
 520     MSIRECORD *row;
 521     LPWSTR source_dir;
 522     LPWSTR source;
 523     DWORD options;
 524     UINT r;
 525
 526     static const WCHAR query[] = {
 527         'S','E','L','E','C','T',' ','*',' ', 'F','R','O','M',' ',
 528         '`','M','e','d','i','a','`',' ','W','H','E','R','E',' ',
 529         '`','L','a','s','t','S','e','q','u','e','n','c','e','`',' ','>','=',
 530         ' ','%','i',' ','A','N','D',' ','`','D','i','s','k','I','d','`',' ','>','=',
 531         ' ','%','i',' ','O','R','D','E','R',' ','B','Y',' ',
 532         '`','D','i','s','k','I','d','`',0};
 533
 534     row = MSI_QueryGetRecord(package->db, query, file->Sequence, mi->disk_id);
 535     if (!row)
 536     {
 537         TRACE("Unable to query row\n");
 538         return ERROR_FUNCTION_FAILED;
 539     }
 540
 541     mi->is_extracted = FALSE;
 542     mi->disk_id = MSI_RecordGetInteger(row, 1);
 543     mi->last_sequence = MSI_RecordGetInteger(row, 2);
 544     msi_free(mi->disk_prompt);
 545     mi->disk_prompt = strdupW(MSI_RecordGetString(row, 3));
 546     msi_free(mi->cabinet);
 547     mi->cabinet = strdupW(MSI_RecordGetString(row, 4));
 548     msi_free(mi->volume_label);
 549     mi->volume_label = strdupW(MSI_RecordGetString(row, 5));
 550     msiobj_release(&row->hdr);
 551
 552     if (!mi->first_volume)
 553         mi->first_volume = strdupW(mi->volume_label);
 554
 555     source_dir = msi_dup_property(package, cszSourceDir);
 556     lstrcpyW(mi->source, source_dir);
 557     mi->type = get_drive_type(source_dir);
 558
 559     if (file->IsCompressed && mi->cabinet)
 560     {
 561         if (mi->cabinet[0] == '#')
 562         {
 563             r = writeout_cabinet_stream(package, &mi->cabinet[1], mi->source);
 564             if (r != ERROR_SUCCESS)
 565             {
 566                 ERR("Failed to extract cabinet stream\n");
 567                 return ERROR_FUNCTION_FAILED;
 568             }
 569         }
 570         else
 571             lstrcatW(mi->source, mi->cabinet);
 572     }
 573
 574     options = MSICODE_PRODUCT;
 575     if (mi->type == DRIVE_CDROM || mi->type == DRIVE_REMOVABLE)
 576     {
 577         source = source_dir;
 578         options |= MSISOURCETYPE_MEDIA;
 579     }
 580     else if (package->BaseURL && UrlIsW(package->BaseURL, URLIS_URL))
 581     {
 582         source = package->BaseURL;
 583         options |= MSISOURCETYPE_URL;
 584     }
 585     else
 586     {
 587         source = mi->source;
 588         options |= MSISOURCETYPE_NETWORK;
 589     }
 590
 591     msi_package_add_media_disk(package, package->Context,
 592                                MSICODE_PRODUCT, mi->disk_id,
 593                                mi->volume_label, mi->disk_prompt);
 594
 595     msi_package_add_info(package, package->Context,
 596                          options, INSTALLPROPERTY_LASTUSEDSOURCEW, source);
 597
 598     msi_free(source_dir);
 599     return ERROR_SUCCESS;
 600 }
 601
 602 /* FIXME: search NETWORK and URL sources as well */
 603 static UINT find_published_source(MSIPACKAGE *package, MSIMEDIAINFO *mi)
 604 {
 605     WCHAR source[MAX_PATH];
 606     WCHAR volume[MAX_PATH];
 607     WCHAR prompt[MAX_PATH];
 608     DWORD volumesz, promptsz;
 609     DWORD index, size, id;
 610     UINT r;
 611
 612     size = MAX_PATH;
 613     r = MsiSourceListGetInfoW(package->ProductCode, NULL,
 614                               package->Context, MSICODE_PRODUCT,
 615                               INSTALLPROPERTY_LASTUSEDSOURCEW, source, &size);
 616     if (r != ERROR_SUCCESS)
 617         return r;
 618
 619     index = 0;
 620     volumesz = MAX_PATH;
 621     promptsz = MAX_PATH;
 622     while (MsiSourceListEnumMediaDisksW(package->ProductCode, NULL,
 623                                         package->Context,
 624                                         MSICODE_PRODUCT, index++, &id,
 625                                         volume, &volumesz, prompt, &promptsz) == ERROR_SUCCESS)
 626     {
 627         mi->disk_id = id;
 628         mi->volume_label = msi_realloc(mi->volume_label, ++volumesz * sizeof(WCHAR));
 629         lstrcpyW(mi->volume_label, volume);
 630         mi->disk_prompt = msi_realloc(mi->disk_prompt, ++promptsz * sizeof(WCHAR));
 631         lstrcpyW(mi->disk_prompt, prompt);
 632
 633         if (source_matches_volume(mi, source))
 634         {
 635             /* FIXME: what about SourceDir */
 636             lstrcpyW(mi->source, source);
 637             return ERROR_SUCCESS;
 638         }
 639     }
 640
 641     return ERROR_FUNCTION_FAILED;
 642 }
 643
 644 UINT ready_media(MSIPACKAGE *package, MSIFILE *file, MSIMEDIAINFO *mi)
 645 {
 646     UINT rc = ERROR_SUCCESS;
 647
 648     /* media info for continuous cabinet is already loaded */
 649     if (mi->is_continuous)
 650         return ERROR_SUCCESS;
 651
 652     rc = msi_load_media_info(package, file, mi);
 653     if (rc != ERROR_SUCCESS)
 654     {
 655         ERR("Unable to load media info\n");
 656         return ERROR_FUNCTION_FAILED;
 657     }
 658
 659     /* cabinet is internal, no checks needed */
 660     if (!mi->cabinet || mi->cabinet[0] == '#')
 661         return ERROR_SUCCESS;
 662
 663     /* package should be downloaded */
 664     if (file->IsCompressed &&
 665         GetFileAttributesW(mi->source) == INVALID_FILE_ATTRIBUTES &&
 666         package->BaseURL && UrlIsW(package->BaseURL, URLIS_URL))
 667     {
 668         WCHAR temppath[MAX_PATH];
 669
 670         msi_download_file(mi->source, temppath);
 671         lstrcpyW(mi->source, temppath);
 672         return ERROR_SUCCESS;
 673     }
 674
 675     /* check volume matches, change media if not */
 676     if (mi->volume_label && mi->disk_id > 1 &&
 677         lstrcmpW(mi->first_volume, mi->volume_label))
 678     {
 679         LPWSTR source = msi_dup_property(package, cszSourceDir);
 680         BOOL matches;
 681
 682         matches = source_matches_volume(mi, source);
 683         msi_free(source);
 684
 685         if ((mi->type == DRIVE_CDROM || mi->type == DRIVE_REMOVABLE) && !matches)
 686         {
 687             rc = msi_change_media(package, mi);
 688             if (rc != ERROR_SUCCESS)
 689                 return rc;
 690         }
 691     }
 692
 693     if (file->IsCompressed &&
 694         GetFileAttributesW(mi->source) == INVALID_FILE_ATTRIBUTES)
 695     {
 696         rc = find_published_source(package, mi);
 697         if (rc != ERROR_SUCCESS)
 698         {
 699             ERR("Cabinet not found: %s\n", debugstr_w(mi->source));
 700             return ERROR_INSTALL_FAILURE;
 701         }
 702     }
 703
 704     return ERROR_SUCCESS;
 705 }