dlls/msi/files.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
  22 /*
  23  * Actions dealing with files These are
  24  *
  25  * InstallFiles
  26  * DuplicateFiles
  27  * MoveFiles
  28  * PatchFiles (TODO)
  29  * RemoveDuplicateFiles
  30  * RemoveFiles
  31  */
  32
  33 #include <stdarg.h>
  34
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "winerror.h"
  38 #include "wine/debug.h"
  39 #include "fdi.h"
  40 #include "msi.h"
  41 #include "msidefs.h"
  42 #include "msipriv.h"
  43 #include "winuser.h"
  44 #include "winreg.h"
  45 #include "shlwapi.h"
  46 #include "wine/unicode.h"
  47
  48 WINE_DEFAULT_DEBUG_CHANNEL(msi);
  49
  50 static void msi_file_update_ui( MSIPACKAGE *package, MSIFILE *f, const WCHAR *action )
  51 {
  52     MSIRECORD *uirow;
  53     LPWSTR uipath, p;
  54
  55     /* the UI chunk */
  56     uirow = MSI_CreateRecord( 9 );
  57     MSI_RecordSetStringW( uirow, 1, f->FileName );
  58     uipath = strdupW( f->TargetPath );
  59     p = strrchrW(uipath,'\\');
  60     if (p)
  61         p[1]=0;
  62     MSI_RecordSetStringW( uirow, 9, uipath);
  63     MSI_RecordSetInteger( uirow, 6, f->FileSize );
  64     ui_actiondata( package, action, uirow);
  65     msiobj_release( &uirow->hdr );
  66     msi_free( uipath );
  67     ui_progress( package, 2, f->FileSize, 0, 0);
  68 }
  69
  70 /* compares the version of a file read from the filesystem and
  71  * the version specified in the File table
  72  */
  73 static int msi_compare_file_version(MSIFILE *file)
  74 {
  75     WCHAR version[MAX_PATH];
  76     DWORD size;
  77     UINT r;
  78
  79     size = MAX_PATH;
  80     version[0] = '\0';
  81     r = MsiGetFileVersionW(file->TargetPath, version, &size, NULL, NULL);
  82     if (r != ERROR_SUCCESS)
  83         return 0;
  84
  85     return lstrcmpW(version, file->Version);
  86 }
  87
  88 static void schedule_install_files(MSIPACKAGE *package)
  89 {
  90     MSIFILE *file;
  91
  92     LIST_FOR_EACH_ENTRY(file, &package->files, MSIFILE, entry)
  93     {
  94         if (file->Component->ActionRequest != INSTALLSTATE_LOCAL)
  95         {
  96             TRACE("File %s is not scheduled for install\n", debugstr_w(file->File));
  97
  98             ui_progress(package,2,file->FileSize,0,0);
  99             file->state = msifs_skipped;
 100         }
 101     }
 102 }
 103
 104 static UINT copy_file(MSIFILE *file, LPWSTR source)
 105 {
 106     BOOL ret;
 107
 108     ret = CopyFileW(source, file->TargetPath, FALSE);
 109     if (!ret)
 110         return GetLastError();
 111
 112     SetFileAttributesW(file->TargetPath, FILE_ATTRIBUTE_NORMAL);
 113
 114     file->state = msifs_installed;
 115     return ERROR_SUCCESS;
 116 }
 117
 118 static UINT copy_install_file(MSIPACKAGE *package, MSIFILE *file, LPWSTR source)
 119 {
 120     UINT gle;
 121
 122     TRACE("Copying %s to %s\n", debugstr_w(source),
 123           debugstr_w(file->TargetPath));
 124
 125     gle = copy_file(file, source);
 126     if (gle == ERROR_SUCCESS)
 127         return gle;
 128
 129     if (gle == ERROR_ALREADY_EXISTS && file->state == msifs_overwrite)
 130     {
 131         TRACE("overwriting existing file\n");
 132         return ERROR_SUCCESS;
 133     }
 134     else if (gle == ERROR_ACCESS_DENIED)
 135     {
 136         SetFileAttributesW(file->TargetPath, FILE_ATTRIBUTE_NORMAL);
 137
 138         gle = copy_file(file, source);
 139         TRACE("Overwriting existing file: %d\n", gle);
 140     }
 141     if (gle == ERROR_SHARING_VIOLATION || gle == ERROR_USER_MAPPED_FILE)
 142     {
 143         WCHAR tmpfileW[MAX_PATH], *pathW, *p;
 144         DWORD len;
 145
 146         TRACE("file in use, scheduling rename operation\n");
 147
 148         GetTempFileNameW(szBackSlash, szMsi, 0, tmpfileW);
 149         len = strlenW(file->TargetPath) + strlenW(tmpfileW) + 1;
 150         if (!(pathW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR))))
 151             return ERROR_OUTOFMEMORY;
 152
 153         strcpyW(pathW, file->TargetPath);
 154         if ((p = strrchrW(pathW, '\\'))) *p = 0;
 155         strcatW(pathW, tmpfileW);
 156
 157         if (CopyFileW(source, pathW, FALSE) &&
 158             MoveFileExW(file->TargetPath, NULL, MOVEFILE_DELAY_UNTIL_REBOOT) &&
 159             MoveFileExW(pathW, file->TargetPath, MOVEFILE_DELAY_UNTIL_REBOOT))
 160         {
 161             file->state = msifs_installed;
 162             package->need_reboot = 1;
 163             gle = ERROR_SUCCESS;
 164         }
 165         else
 166         {
 167             gle = GetLastError();
 168             WARN("failed to schedule rename operation: %d)\n", gle);
 169         }
 170         HeapFree(GetProcessHeap(), 0, pathW);
 171     }
 172
 173     return gle;
 174 }
 175
 176 static BOOL check_dest_hash_matches(MSIFILE *file)
 177 {
 178     MSIFILEHASHINFO hash;
 179     UINT r;
 180
 181     if (!file->hash.dwFileHashInfoSize)
 182         return FALSE;
 183
 184     hash.dwFileHashInfoSize = sizeof(MSIFILEHASHINFO);
 185     r = MsiGetFileHashW(file->TargetPath, 0, &hash);
 186     if (r != ERROR_SUCCESS)
 187         return FALSE;
 188
 189     return !memcmp(&hash, &file->hash, sizeof(MSIFILEHASHINFO));
 190 }
 191
 192 static BOOL installfiles_cb(MSIPACKAGE *package, LPCWSTR file, DWORD action,
 193                             LPWSTR *path, DWORD *attrs, PVOID user)
 194 {
 195     static MSIFILE *f = NULL;
 196
 197     if (action == MSICABEXTRACT_BEGINEXTRACT)
 198     {
 199         f = get_loaded_file(package, file);
 200         if (!f)
 201         {
 202             WARN("unknown file in cabinet (%s)\n", debugstr_w(file));
 203             return FALSE;
 204         }
 205
 206         if (f->state != msifs_missing && f->state != msifs_overwrite)
 207         {
 208             TRACE("Skipping extraction of %s\n", debugstr_w(file));
 209             return FALSE;
 210         }
 211
 212         msi_file_update_ui(package, f, szInstallFiles);
 213
 214         *path = strdupW(f->TargetPath);
 215         *attrs = f->Attributes;
 216     }
 217     else if (action == MSICABEXTRACT_FILEEXTRACTED)
 218     {
 219         f->state = msifs_installed;
 220         f = NULL;
 221     }
 222
 223     return TRUE;
 224 }
 225
 226 /*
 227  * ACTION_InstallFiles()
 228  *
 229  * For efficiency, this is done in two passes:
 230  * 1) Correct all the TargetPaths and determine what files are to be installed.
 231  * 2) Extract Cabinets and copy files.
 232  */
 233 UINT ACTION_InstallFiles(MSIPACKAGE *package)
 234 {
 235     MSIMEDIAINFO *mi;
 236     UINT rc = ERROR_SUCCESS;
 237     MSIFILE *file;
 238
 239     /* increment progress bar each time action data is sent */
 240     ui_progress(package,1,1,0,0);
 241
 242     schedule_install_files(package);
 243
 244     /*
 245      * Despite MSDN specifying that the CreateFolders action
 246      * should be called before InstallFiles, some installers don't
 247      * do that, and they seem to work correctly.  We need to create
 248      * directories here to make sure that the files can be copied.
 249      */
 250     msi_create_component_directories( package );
 251
 252     mi = msi_alloc_zero( sizeof(MSIMEDIAINFO) );
 253
 254     LIST_FOR_EACH_ENTRY( file, &package->files, MSIFILE, entry )
 255     {
 256         if (file->state != msifs_missing && !mi->is_continuous && file->state != msifs_overwrite)
 257             continue;
 258
 259         if (check_dest_hash_matches(file))
 260         {
 261             TRACE("File hashes match, not overwriting\n");
 262             continue;
 263         }
 264
 265         if (MsiGetFileVersionW(file->TargetPath, NULL, NULL, NULL, NULL) == ERROR_SUCCESS &&
 266             msi_compare_file_version(file) >= 0)
 267         {
 268             TRACE("Destination file version greater, not overwriting\n");
 269             continue;
 270         }
 271
 272         if (file->Sequence > mi->last_sequence || mi->is_continuous ||
 273             (file->IsCompressed && !mi->is_extracted))
 274         {
 275             MSICABDATA data;
 276
 277             rc = ready_media(package, file, mi);
 278             if (rc != ERROR_SUCCESS)
 279             {
 280                 ERR("Failed to ready media\n");
 281                 break;
 282             }
 283
 284             data.mi = mi;
 285             data.package = package;
 286             data.cb = installfiles_cb;
 287             data.user = NULL;
 288
 289             if (file->IsCompressed &&
 290                 !msi_cabextract(package, mi, &data))
 291             {
 292                 ERR("Failed to extract cabinet: %s\n", debugstr_w(mi->cabinet));
 293                 rc = ERROR_FUNCTION_FAILED;
 294                 break;
 295             }
 296         }
 297
 298         if (!file->IsCompressed)
 299         {
 300             LPWSTR source = resolve_file_source(package, file);
 301
 302             TRACE("file paths %s to %s\n", debugstr_w(source),
 303                   debugstr_w(file->TargetPath));
 304
 305             msi_file_update_ui(package, file, szInstallFiles);
 306             rc = copy_install_file(package, file, source);
 307             if (rc != ERROR_SUCCESS)
 308             {
 309                 ERR("Failed to copy %s to %s (%d)\n", debugstr_w(source),
 310                     debugstr_w(file->TargetPath), rc);
 311                 rc = ERROR_INSTALL_FAILURE;
 312                 msi_free(source);
 313                 break;
 314             }
 315
 316             msi_free(source);
 317         }
 318         else if (file->state != msifs_installed)
 319         {
 320             ERR("compressed file wasn't extracted (%s)\n",
 321                 debugstr_w(file->TargetPath));
 322             rc = ERROR_INSTALL_FAILURE;
 323             break;
 324         }
 325     }
 326
 327     msi_free_media_info(mi);
 328     return rc;
 329 }
 330
 331 static WCHAR *get_duplicate_filename( MSIPACKAGE *package, MSIRECORD *row, const WCHAR *file_key, const WCHAR *src )
 332 {
 333     DWORD len;
 334     WCHAR *dst_name, *dst_path, *dst;
 335
 336     if (MSI_RecordIsNull( row, 4 ))
 337     {
 338         len = strlenW( src ) + 1;
 339         if (!(dst_name = msi_alloc( len * sizeof(WCHAR)))) return NULL;
 340         strcpyW( dst_name, strrchrW( src, '\\' ) + 1 );
 341     }
 342     else
 343     {
 344         MSI_RecordGetStringW( row, 4, NULL, &len );
 345         if (!(dst_name = msi_alloc( ++len * sizeof(WCHAR) ))) return NULL;
 346         MSI_RecordGetStringW( row, 4, dst_name, &len );
 347         reduce_to_longfilename( dst_name );
 348     }
 349
 350     if (MSI_RecordIsNull( row, 5 ))
 351     {
 352         WCHAR *p;
 353         dst_path = strdupW( src );
 354         p = strrchrW( dst_path, '\\' );
 355         if (p) *p = 0;
 356     }
 357     else
 358     {
 359         const WCHAR *dst_key = MSI_RecordGetString( row, 5 );
 360
 361         dst_path = resolve_folder( package, dst_key, FALSE, FALSE, TRUE, NULL );
 362         if (!dst_path)
 363         {
 364             /* try a property */
 365             dst_path = msi_dup_property( package, dst_key );
 366             if (!dst_path)
 367             {
 368                 FIXME("Unable to get destination folder, try AppSearch properties\n");
 369                 msi_free( dst_name );
 370                 return NULL;
 371             }
 372         }
 373     }
 374
 375     dst = build_directory_name( 2, dst_path, dst_name );
 376     create_full_pathW( dst_path );
 377
 378     msi_free( dst_name );
 379     msi_free( dst_path );
 380     return dst;
 381 }
 382
 383 static UINT ITERATE_DuplicateFiles(MSIRECORD *row, LPVOID param)
 384 {
 385     MSIPACKAGE *package = param;
 386     LPWSTR dest;
 387     LPCWSTR file_key, component;
 388     MSICOMPONENT *comp;
 389     MSIRECORD *uirow;
 390     MSIFILE *file;
 391
 392     component = MSI_RecordGetString(row,2);
 393     comp = get_loaded_component(package,component);
 394     if (!comp)
 395         return ERROR_SUCCESS;
 396
 397     if (comp->ActionRequest != INSTALLSTATE_LOCAL)
 398     {
 399         TRACE("Component not scheduled for installation %s\n", debugstr_w(component));
 400         comp->Action = comp->Installed;
 401         return ERROR_SUCCESS;
 402     }
 403     comp->Action = INSTALLSTATE_LOCAL;
 404
 405     file_key = MSI_RecordGetString(row,3);
 406     if (!file_key)
 407     {
 408         ERR("Unable to get file key\n");
 409         return ERROR_FUNCTION_FAILED;
 410     }
 411
 412     file = get_loaded_file( package, file_key );
 413     if (!file)
 414     {
 415         ERR("Original file unknown %s\n", debugstr_w(file_key));
 416         return ERROR_SUCCESS;
 417     }
 418
 419     dest = get_duplicate_filename( package, row, file_key, file->TargetPath );
 420     if (!dest)
 421     {
 422         WARN("Unable to get duplicate filename\n");
 423         return ERROR_SUCCESS;
 424     }
 425
 426     TRACE("Duplicating file %s to %s\n", debugstr_w(file->TargetPath), debugstr_w(dest));
 427
 428     if (!CopyFileW( file->TargetPath, dest, TRUE ))
 429     {
 430         WARN("Failed to copy file %s -> %s (%u)\n",
 431              debugstr_w(file->TargetPath), debugstr_w(dest), GetLastError());
 432     }
 433
 434     FIXME("We should track these duplicate files as well\n");
 435
 436     uirow = MSI_CreateRecord( 9 );
 437     MSI_RecordSetStringW( uirow, 1, MSI_RecordGetString( row, 1 ) );
 438     MSI_RecordSetInteger( uirow, 6, file->FileSize );
 439     MSI_RecordSetStringW( uirow, 9, MSI_RecordGetString( row, 5 ) );
 440     ui_actiondata( package, szDuplicateFiles, uirow );
 441     msiobj_release( &uirow->hdr );
 442
 443     msi_free(dest);
 444     return ERROR_SUCCESS;
 445 }
 446
 447 UINT ACTION_DuplicateFiles(MSIPACKAGE *package)
 448 {
 449     UINT rc;
 450     MSIQUERY * view;
 451     static const WCHAR ExecSeqQuery[] =
 452         {'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
 453          '`','D','u','p','l','i','c','a','t','e','F','i','l','e','`',0};
 454
 455     rc = MSI_DatabaseOpenViewW(package->db, ExecSeqQuery, &view);
 456     if (rc != ERROR_SUCCESS)
 457         return ERROR_SUCCESS;
 458
 459     rc = MSI_IterateRecords(view, NULL, ITERATE_DuplicateFiles, package);
 460     msiobj_release(&view->hdr);
 461
 462     return rc;
 463 }
 464
 465 static UINT ITERATE_RemoveDuplicateFiles( MSIRECORD *row, LPVOID param )
 466 {
 467     MSIPACKAGE *package = param;
 468     LPWSTR dest;
 469     LPCWSTR file_key, component;
 470     MSICOMPONENT *comp;
 471     MSIRECORD *uirow;
 472     MSIFILE *file;
 473
 474     component = MSI_RecordGetString( row, 2 );
 475     comp = get_loaded_component( package, component );
 476     if (!comp)
 477         return ERROR_SUCCESS;
 478
 479     if (comp->ActionRequest != INSTALLSTATE_ABSENT)
 480     {
 481         TRACE("Component not scheduled for removal %s\n", debugstr_w(component));
 482         comp->Action = comp->Installed;
 483         return ERROR_SUCCESS;
 484     }
 485     comp->Action = INSTALLSTATE_ABSENT;
 486
 487     file_key = MSI_RecordGetString( row, 3 );
 488     if (!file_key)
 489     {
 490         ERR("Unable to get file key\n");
 491         return ERROR_FUNCTION_FAILED;
 492     }
 493
 494     file = get_loaded_file( package, file_key );
 495     if (!file)
 496     {
 497         ERR("Original file unknown %s\n", debugstr_w(file_key));
 498         return ERROR_SUCCESS;
 499     }
 500
 501     dest = get_duplicate_filename( package, row, file_key, file->TargetPath );
 502     if (!dest)
 503     {
 504         WARN("Unable to get duplicate filename\n");
 505         return ERROR_SUCCESS;
 506     }
 507
 508     TRACE("Removing duplicate %s of %s\n", debugstr_w(dest), debugstr_w(file->TargetPath));
 509
 510     if (!DeleteFileW( dest ))
 511     {
 512         WARN("Failed to delete duplicate file %s (%u)\n", debugstr_w(dest), GetLastError());
 513     }
 514
 515     uirow = MSI_CreateRecord( 9 );
 516     MSI_RecordSetStringW( uirow, 1, MSI_RecordGetString( row, 1 ) );
 517     MSI_RecordSetStringW( uirow, 9, MSI_RecordGetString( row, 5 ) );
 518     ui_actiondata( package, szRemoveDuplicateFiles, uirow );
 519     msiobj_release( &uirow->hdr );
 520
 521     msi_free(dest);
 522     return ERROR_SUCCESS;
 523 }
 524
 525 UINT ACTION_RemoveDuplicateFiles( MSIPACKAGE *package )
 526 {
 527     UINT rc;
 528     MSIQUERY *view;
 529     static const WCHAR query[] =
 530         {'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
 531          '`','D','u','p','l','i','c','a','t','e','F','i','l','e','`',0};
 532
 533     rc = MSI_DatabaseOpenViewW( package->db, query, &view );
 534     if (rc != ERROR_SUCCESS)
 535         return ERROR_SUCCESS;
 536
 537     rc = MSI_IterateRecords( view, NULL, ITERATE_RemoveDuplicateFiles, package );
 538     msiobj_release( &view->hdr );
 539
 540     return rc;
 541 }
 542
 543 static BOOL verify_comp_for_removal(MSICOMPONENT *comp, UINT install_mode)
 544 {
 545     INSTALLSTATE request = comp->ActionRequest;
 546
 547     if (request == INSTALLSTATE_UNKNOWN)
 548         return FALSE;
 549
 550     if (install_mode == msidbRemoveFileInstallModeOnInstall &&
 551         (request == INSTALLSTATE_LOCAL || request == INSTALLSTATE_SOURCE))
 552         return TRUE;
 553
 554     if (request == INSTALLSTATE_ABSENT)
 555     {
 556         if (!comp->ComponentId)
 557             return FALSE;
 558
 559         if (install_mode == msidbRemoveFileInstallModeOnRemove)
 560             return TRUE;
 561     }
 562
 563     if (install_mode == msidbRemoveFileInstallModeOnBoth)
 564         return TRUE;
 565
 566     return FALSE;
 567 }
 568
 569 static UINT ITERATE_RemoveFiles(MSIRECORD *row, LPVOID param)
 570 {
 571     MSIPACKAGE *package = param;
 572     MSICOMPONENT *comp;
 573     LPCWSTR component, filename, dirprop;
 574     UINT install_mode;
 575     LPWSTR dir = NULL, path = NULL;
 576     DWORD size;
 577     UINT r;
 578
 579     component = MSI_RecordGetString(row, 2);
 580     filename = MSI_RecordGetString(row, 3);
 581     dirprop = MSI_RecordGetString(row, 4);
 582     install_mode = MSI_RecordGetInteger(row, 5);
 583
 584     comp = get_loaded_component(package, component);
 585     if (!comp)
 586     {
 587         ERR("Invalid component: %s\n", debugstr_w(component));
 588         return ERROR_FUNCTION_FAILED;
 589     }
 590
 591     if (!verify_comp_for_removal(comp, install_mode))
 592     {
 593         TRACE("Skipping removal due to missing conditions\n");
 594         comp->Action = comp->Installed;
 595         return ERROR_SUCCESS;
 596     }
 597
 598     dir = msi_dup_property(package, dirprop);
 599     if (!dir)
 600         return ERROR_OUTOFMEMORY;
 601
 602     size = (filename != NULL) ? lstrlenW(filename) : 0;
 603     size += lstrlenW(dir) + 2;
 604     path = msi_alloc(size * sizeof(WCHAR));
 605     if (!path)
 606     {
 607         r = ERROR_OUTOFMEMORY;
 608         goto done;
 609     }
 610
 611     if (filename)
 612     {
 613         lstrcpyW(path, dir);
 614         PathAddBackslashW(path);
 615         lstrcatW(path, filename);
 616
 617         TRACE("Deleting misc file: %s\n", debugstr_w(path));
 618         DeleteFileW(path);
 619     }
 620     else
 621     {
 622         TRACE("Removing misc directory: %s\n", debugstr_w(dir));
 623         RemoveDirectoryW(dir);
 624     }
 625
 626 done:
 627     msi_free(path);
 628     msi_free(dir);
 629     return ERROR_SUCCESS;
 630 }
 631
 632 UINT ACTION_RemoveFiles( MSIPACKAGE *package )
 633 {
 634     MSIQUERY *view;
 635     MSIFILE *file;
 636     UINT r;
 637
 638     static const WCHAR query[] = {
 639         'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
 640         '`','R','e','m','o','v','e','F','i','l','e','`',0};
 641     static const WCHAR folder_query[] = {
 642         'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
 643         '`','C','r','e','a','t','e','F','o','l','d','e','r','`',0};
 644
 645     r = MSI_DatabaseOpenViewW(package->db, query, &view);
 646     if (r == ERROR_SUCCESS)
 647     {
 648         MSI_IterateRecords(view, NULL, ITERATE_RemoveFiles, package);
 649         msiobj_release(&view->hdr);
 650     }
 651
 652     r = MSI_DatabaseOpenViewW(package->db, folder_query, &view);
 653     if (r == ERROR_SUCCESS)
 654         msiobj_release(&view->hdr);
 655
 656     LIST_FOR_EACH_ENTRY( file, &package->files, MSIFILE, entry )
 657     {
 658         MSIRECORD *uirow;
 659         LPWSTR dir, uipath, p;
 660
 661         if ( file->state == msifs_installed )
 662             ERR("removing installed file %s\n", debugstr_w(file->TargetPath));
 663
 664         if ( file->Component->ActionRequest != INSTALLSTATE_ABSENT ||
 665              file->Component->Installed == INSTALLSTATE_SOURCE )
 666             continue;
 667
 668         /* don't remove a file if the old file
 669          * is strictly newer than the version to be installed
 670          */
 671         if ( msi_compare_file_version( file ) < 0 )
 672             continue;
 673
 674         TRACE("removing %s\n", debugstr_w(file->File) );
 675         if (!DeleteFileW( file->TargetPath ))
 676         {
 677             WARN("failed to delete %s\n",  debugstr_w(file->TargetPath));
 678         }
 679         /* FIXME: check persistence for each directory */
 680         else if (r && (dir = strdupW( file->TargetPath )))
 681         {
 682             if ((p = strrchrW( dir, '\\' ))) *p = 0;
 683             RemoveDirectoryW( dir );
 684             msi_free( dir );
 685         }
 686         file->state = msifs_missing;
 687
 688         /* the UI chunk */
 689         uirow = MSI_CreateRecord( 9 );
 690         MSI_RecordSetStringW( uirow, 1, file->FileName );
 691         uipath = strdupW( file->TargetPath );
 692         p = strrchrW(uipath,'\\');
 693         if (p)
 694             p[1]=0;
 695         MSI_RecordSetStringW( uirow, 9, uipath);
 696         ui_actiondata( package, szRemoveFiles, uirow);
 697         msiobj_release( &uirow->hdr );
 698         msi_free( uipath );
 699         /* FIXME: call ui_progress here? */
 700     }
 701
 702     return ERROR_SUCCESS;
 703 }