dlls/setupapi/fakedll.c

   1 /*
   2  * Creation of Wine fake dlls for apps that access the dll file directly.
   3  *
   4  * Copyright 2006 Alexandre Julliard
   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 "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25 #include <fcntl.h>
  26 #ifdef HAVE_DIRENT_H
  27 # include <dirent.h>
  28 #endif
  29 #ifdef HAVE_SYS_STAT_H
  30 # include <sys/stat.h>
  31 #endif
  32 #ifdef HAVE_UNISTD_H
  33 # include <unistd.h>
  34 #endif
  35
  36 #define NONAMELESSSTRUCT
  37 #define NONAMELESSUNION
  38 #include "ntstatus.h"
  39 #define WIN32_NO_STATUS
  40 #include "windef.h"
  41 #include "winbase.h"
  42 #include "winuser.h"
  43 #include "winnt.h"
  44 #include "winternl.h"
  45 #include "wine/unicode.h"
  46 #include "wine/library.h"
  47 #include "wine/debug.h"
  48
  49 WINE_DEFAULT_DEBUG_CHANNEL(setupapi);
  50
  51 static const char fakedll_signature[] = "Wine placeholder DLL";
  52
  53 static const unsigned int file_alignment = 512;
  54 static const unsigned int section_alignment = 4096;
  55 static const unsigned int max_dll_name_len = 64;
  56
  57 static void *file_buffer;
  58 static size_t file_buffer_size;
  59 static unsigned int handled_count;
  60 static unsigned int handled_total;
  61 static char **handled_dlls;
  62
  63 struct dll_info
  64 {
  65     HANDLE            handle;
  66     IMAGE_NT_HEADERS *nt;
  67     DWORD             file_pos;
  68     DWORD             mem_pos;
  69 };
  70
  71 #define ALIGN(size,align) (((size) + (align) - 1) & ~((align) - 1))
  72
  73 /* contents of the dll sections */
  74
  75 static const BYTE dll_code_section[] = { 0x31, 0xc0,          /* xor %eax,%eax */
  76                                          0xc2, 0x0c, 0x00 };  /* ret $12 */
  77
  78 static const BYTE exe_code_section[] = { 0xb8, 0x01, 0x00, 0x00, 0x00,  /* movl $1,%eax */
  79                                          0xc2, 0x04, 0x00 };            /* ret $4 */
  80
  81 static const IMAGE_BASE_RELOCATION reloc_section;  /* empty relocs */
  82
  83
  84 /* wrapper for WriteFile */
  85 static inline BOOL xwrite( struct dll_info *info, const void *data, DWORD size, DWORD offset )
  86 {
  87     DWORD res;
  88
  89     return (SetFilePointer( info->handle, offset, NULL, FILE_BEGIN ) != INVALID_SET_FILE_POINTER &&
  90             WriteFile( info->handle, data, size, &res, NULL ) &&
  91             res == size);
  92 }
  93
  94 /* add a new section to the dll NT header */
  95 static void add_section( struct dll_info *info, const char *name, DWORD size, DWORD flags )
  96 {
  97     IMAGE_SECTION_HEADER *sec = (IMAGE_SECTION_HEADER *)(info->nt + 1);
  98
  99     sec += info->nt->FileHeader.NumberOfSections;
 100     memcpy( sec->Name, name, min( strlen(name), sizeof(sec->Name)) );
 101     sec->Misc.VirtualSize = ALIGN( size, section_alignment );
 102     sec->VirtualAddress   = info->mem_pos;
 103     sec->SizeOfRawData    = size;
 104     sec->PointerToRawData = info->file_pos;
 105     sec->Characteristics  = flags;
 106     info->file_pos += ALIGN( size, file_alignment );
 107     info->mem_pos  += ALIGN( size, section_alignment );
 108     info->nt->FileHeader.NumberOfSections++;
 109 }
 110
 111 /* add a data directory to the dll NT header */
 112 static inline void add_directory( struct dll_info *info, unsigned int idx, DWORD rva, DWORD size )
 113 {
 114     info->nt->OptionalHeader.DataDirectory[idx].VirtualAddress = rva;
 115     info->nt->OptionalHeader.DataDirectory[idx].Size = size;
 116 }
 117
 118 /* convert a dll name W->A without depending on the current codepage */
 119 static char *dll_name_WtoA( char *nameA, const WCHAR *nameW, unsigned int len )
 120 {
 121     unsigned int i;
 122
 123     for (i = 0; i < len; i++)
 124     {
 125         char c = nameW[i];
 126         if (nameW[i] > 127) return NULL;
 127         if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
 128         nameA[i] = c;
 129     }
 130     nameA[i] = 0;
 131     return nameA;
 132 }
 133
 134 /* convert a dll name A->W without depending on the current codepage */
 135 static WCHAR *dll_name_AtoW( WCHAR *nameW, const char *nameA, unsigned int len )
 136 {
 137     unsigned int i;
 138
 139     for (i = 0; i < len; i++) nameW[i] = nameA[i];
 140     nameW[i] = 0;
 141     return nameW;
 142 }
 143
 144 /* add a dll to the list of dll that have been taken care of */
 145 static BOOL add_handled_dll( const WCHAR *name )
 146 {
 147     unsigned int len = strlenW( name );
 148     int i, min, max, pos, res;
 149     char *nameA;
 150
 151     if (!(nameA = HeapAlloc( GetProcessHeap(), 0, len + 1 ))) return FALSE;
 152     if (!dll_name_WtoA( nameA, name, len )) goto failed;
 153
 154     min = 0;
 155     max = handled_count - 1;
 156     while (min <= max)
 157     {
 158         pos = (min + max) / 2;
 159         res = strcmp( handled_dlls[pos], nameA );
 160         if (!res) goto failed;  /* already in the list */
 161         if (res < 0) min = pos + 1;
 162         else max = pos - 1;
 163     }
 164
 165     if (handled_count >= handled_total)
 166     {
 167         char **new_dlls;
 168         unsigned int new_count = max( 64, handled_total * 2 );
 169
 170         if (handled_dlls) new_dlls = HeapReAlloc( GetProcessHeap(), 0, handled_dlls,
 171                                                   new_count * sizeof(*handled_dlls) );
 172         else new_dlls = HeapAlloc( GetProcessHeap(), 0, new_count * sizeof(*handled_dlls) );
 173         if (!new_dlls) goto failed;
 174         handled_dlls = new_dlls;
 175         handled_total = new_count;
 176     }
 177
 178     for (i = handled_count; i > min; i--) handled_dlls[i] = handled_dlls[i - 1];
 179     handled_dlls[i] = nameA;
 180     handled_count++;
 181     return TRUE;
 182
 183 failed:
 184     HeapFree( GetProcessHeap(), 0, nameA );
 185     return FALSE;
 186 }
 187
 188 /* read in the contents of a file into the global file buffer */
 189 /* return 1 on success, 0 on nonexistent file, -1 on other error */
 190 static int read_file( const char *name, void **data, size_t *size )
 191 {
 192     static char static_file_buffer[4096];
 193     struct stat st;
 194     void *buffer = static_file_buffer;
 195     int fd, ret = -1;
 196     size_t header_size;
 197     IMAGE_DOS_HEADER *dos;
 198     IMAGE_NT_HEADERS *nt;
 199     const size_t min_size = sizeof(*dos) + sizeof(fakedll_signature) +
 200         FIELD_OFFSET( IMAGE_NT_HEADERS, OptionalHeader.MajorLinkerVersion );
 201
 202     if ((fd = open( name, O_RDONLY | O_BINARY )) == -1) return 0;
 203     if (fstat( fd, &st ) == -1) goto done;
 204     *size = st.st_size;
 205     if (st.st_size > sizeof(static_file_buffer))
 206     {
 207         if (!file_buffer || st.st_size > file_buffer_size)
 208         {
 209             HeapFree( GetProcessHeap(), 0, file_buffer );
 210             if (!(file_buffer = HeapAlloc( GetProcessHeap(), 0, st.st_size ))) goto done;
 211             file_buffer_size = st.st_size;
 212         }
 213         buffer = file_buffer;
 214     }
 215
 216     /* check for valid fake dll file */
 217
 218     if (st.st_size < min_size) goto done;
 219     header_size = min( st.st_size, 4096 );
 220     if (pread( fd, buffer, header_size, 0 ) != header_size) goto done;
 221     dos = buffer;
 222     if (dos->e_magic != IMAGE_DOS_SIGNATURE) goto done;
 223     if (dos->e_lfanew < sizeof(fakedll_signature)) goto done;
 224     if (memcmp( dos + 1, fakedll_signature, sizeof(fakedll_signature) )) goto done;
 225     if (dos->e_lfanew + FIELD_OFFSET(IMAGE_NT_HEADERS,OptionalHeader.MajorLinkerVersion) > header_size)
 226         goto done;
 227     nt = (IMAGE_NT_HEADERS *)((char *)buffer + dos->e_lfanew);
 228     if (nt->Signature == IMAGE_NT_SIGNATURE && nt->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR_MAGIC)
 229     {
 230         /* wrong 32/64 type, pretend it doesn't exist */
 231         ret = 0;
 232         goto done;
 233     }
 234     if (st.st_size == header_size ||
 235         pread( fd, (char *)buffer + header_size,
 236                st.st_size - header_size, header_size ) == st.st_size - header_size)
 237     {
 238         *data = buffer;
 239         ret = 1;
 240     }
 241 done:
 242     close( fd );
 243     return ret;
 244 }
 245
 246 /* build a complete fake dll from scratch */
 247 static BOOL build_fake_dll( HANDLE file )
 248 {
 249     IMAGE_DOS_HEADER *dos;
 250     IMAGE_NT_HEADERS *nt;
 251     struct dll_info info;
 252     BYTE *buffer;
 253     BOOL ret = FALSE;
 254     DWORD lfanew = (sizeof(*dos) + sizeof(fakedll_signature) + 15) & ~15;
 255     DWORD size, header_size = lfanew + sizeof(*nt);
 256
 257     info.handle = file;
 258     buffer = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, header_size + 8 * sizeof(IMAGE_SECTION_HEADER) );
 259
 260     dos = (IMAGE_DOS_HEADER *)buffer;
 261     dos->e_magic    = IMAGE_DOS_SIGNATURE;
 262     dos->e_cblp     = sizeof(*dos);
 263     dos->e_cp       = 1;
 264     dos->e_cparhdr  = lfanew / 16;
 265     dos->e_minalloc = 0;
 266     dos->e_maxalloc = 0xffff;
 267     dos->e_ss       = 0x0000;
 268     dos->e_sp       = 0x00b8;
 269     dos->e_lfarlc   = lfanew;
 270     dos->e_lfanew   = lfanew;
 271     memcpy( dos + 1, fakedll_signature, sizeof(fakedll_signature) );
 272
 273     nt = info.nt = (IMAGE_NT_HEADERS *)(buffer + lfanew);
 274     /* some fields are copied from the source dll */
 275 #ifdef _WIN64
 276     nt->FileHeader.Machine = IMAGE_FILE_MACHINE_AMD64;
 277 #else
 278     nt->FileHeader.Machine = IMAGE_FILE_MACHINE_I386;
 279 #endif
 280     nt->FileHeader.TimeDateStamp = 0;
 281     nt->FileHeader.Characteristics = IMAGE_FILE_DLL;
 282     nt->OptionalHeader.MajorLinkerVersion = 1;
 283     nt->OptionalHeader.MinorLinkerVersion = 0;
 284     nt->OptionalHeader.MajorOperatingSystemVersion = 1;
 285     nt->OptionalHeader.MinorOperatingSystemVersion = 0;
 286     nt->OptionalHeader.MajorImageVersion = 1;
 287     nt->OptionalHeader.MinorImageVersion = 0;
 288     nt->OptionalHeader.MajorSubsystemVersion = 4;
 289     nt->OptionalHeader.MinorSubsystemVersion = 0;
 290     nt->OptionalHeader.Win32VersionValue = 0;
 291     nt->OptionalHeader.Subsystem = IMAGE_SUBSYSTEM_WINDOWS_GUI;
 292     nt->OptionalHeader.DllCharacteristics = 0;
 293     nt->OptionalHeader.SizeOfStackReserve = 0;
 294     nt->OptionalHeader.SizeOfStackCommit = 0;
 295     nt->OptionalHeader.SizeOfHeapReserve = 0;
 296     nt->OptionalHeader.SizeOfHeapCommit = 0;
 297     /* other fields have fixed values */
 298     nt->Signature                              = IMAGE_NT_SIGNATURE;
 299     nt->FileHeader.NumberOfSections            = 0;
 300     nt->FileHeader.SizeOfOptionalHeader        = IMAGE_SIZEOF_NT_OPTIONAL_HEADER;
 301     nt->OptionalHeader.Magic                   = IMAGE_NT_OPTIONAL_HDR_MAGIC;
 302     nt->OptionalHeader.ImageBase               = 0x10000000;
 303     nt->OptionalHeader.SectionAlignment        = section_alignment;
 304     nt->OptionalHeader.FileAlignment           = file_alignment;
 305     nt->OptionalHeader.NumberOfRvaAndSizes     = IMAGE_NUMBEROF_DIRECTORY_ENTRIES;
 306
 307     header_size = (BYTE *)(nt + 1) - buffer;
 308     info.mem_pos  = ALIGN( header_size, section_alignment );
 309     info.file_pos = ALIGN( header_size, file_alignment );
 310
 311     nt->OptionalHeader.AddressOfEntryPoint = info.mem_pos;
 312     nt->OptionalHeader.BaseOfCode          = info.mem_pos;
 313
 314     if (nt->FileHeader.Characteristics & IMAGE_FILE_DLL)
 315     {
 316         size = sizeof(dll_code_section);
 317         if (!xwrite( &info, dll_code_section, size, info.file_pos )) goto done;
 318     }
 319     else
 320     {
 321         size = sizeof(exe_code_section);
 322         if (!xwrite( &info, exe_code_section, size, info.file_pos )) goto done;
 323     }
 324     nt->OptionalHeader.SizeOfCode = size;
 325     add_section( &info, ".text", size, IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ );
 326
 327     if (!xwrite( &info, &reloc_section, sizeof(reloc_section), info.file_pos )) goto done;
 328     add_directory( &info, IMAGE_DIRECTORY_ENTRY_BASERELOC, info.mem_pos, sizeof(reloc_section) );
 329     add_section( &info, ".reloc", sizeof(reloc_section),
 330                  IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_DISCARDABLE | IMAGE_SCN_MEM_READ );
 331
 332     header_size += nt->FileHeader.NumberOfSections * sizeof(IMAGE_SECTION_HEADER);
 333     nt->OptionalHeader.SizeOfHeaders = ALIGN( header_size, file_alignment );
 334     nt->OptionalHeader.SizeOfImage   = ALIGN( info.mem_pos, section_alignment );
 335     ret = xwrite( &info, buffer, header_size, 0 );
 336 done:
 337     HeapFree( GetProcessHeap(), 0, buffer );
 338     return ret;
 339 }
 340
 341 /* check if an existing file is a fake dll so that we can overwrite it */
 342 static BOOL is_fake_dll( HANDLE h )
 343 {
 344     IMAGE_DOS_HEADER *dos;
 345     DWORD size;
 346     BYTE buffer[sizeof(*dos) + sizeof(fakedll_signature)];
 347
 348     if (!ReadFile( h, buffer, sizeof(buffer), &size, NULL ) || size != sizeof(buffer))
 349         return FALSE;
 350     dos = (IMAGE_DOS_HEADER *)buffer;
 351     if (dos->e_magic != IMAGE_DOS_SIGNATURE) return FALSE;
 352     if (dos->e_lfanew < size) return FALSE;
 353     return !memcmp( dos + 1, fakedll_signature, sizeof(fakedll_signature) );
 354 }
 355
 356 /* create directories leading to a given file */
 357 static void create_directories( const WCHAR *name )
 358 {
 359     WCHAR *path, *p;
 360
 361     /* create the directory/directories */
 362     path = HeapAlloc(GetProcessHeap(), 0, (strlenW(name) + 1)*sizeof(WCHAR));
 363     strcpyW(path, name);
 364
 365     p = strchrW(path, '\\');
 366     while (p != NULL)
 367     {
 368         *p = 0;
 369         if (!CreateDirectoryW(path, NULL))
 370             TRACE("Couldn't create directory %s - error: %d\n", wine_dbgstr_w(path), GetLastError());
 371         *p = '\\';
 372         p = strchrW(p+1, '\\');
 373     }
 374     HeapFree(GetProcessHeap(), 0, path);
 375 }
 376
 377 static inline char *prepend( char *buffer, const char *str, size_t len )
 378 {
 379     return memcpy( buffer - len, str, len );
 380 }
 381
 382 /* try to load a pre-compiled fake dll */
 383 static void *load_fake_dll( const WCHAR *name, size_t *size )
 384 {
 385     const char *build_dir = wine_get_build_dir();
 386     const char *path;
 387     char *file, *ptr;
 388     void *data = NULL;
 389     unsigned int i, pos, len, namelen, maxlen = 0;
 390     WCHAR *p;
 391     int res = 0;
 392
 393     if ((p = strrchrW( name, '\\' ))) name = p + 1;
 394
 395     i = 0;
 396     if (build_dir) maxlen = strlen(build_dir) + sizeof("/programs/") + strlenW(name);
 397     while ((path = wine_dll_enum_load_path( i++ ))) maxlen = max( maxlen, strlen(path) );
 398     maxlen += sizeof("/fakedlls") + strlenW(name) + 2;
 399
 400     if (!(file = HeapAlloc( GetProcessHeap(), 0, maxlen ))) return NULL;
 401
 402     len = strlenW( name );
 403     pos = maxlen - len - sizeof(".fake");
 404     if (!dll_name_WtoA( file + pos, name, len )) goto done;
 405     file[--pos] = '/';
 406
 407     if (build_dir)
 408     {
 409         strcpy( file + pos + len + 1, ".fake" );
 410
 411         /* try as a dll */
 412         ptr = file + pos;
 413         namelen = len + 1;
 414         if (namelen > 4 && !memcmp( ptr + namelen - 4, ".dll", 4 )) namelen -= 4;
 415         ptr = prepend( ptr, ptr, namelen );
 416         ptr = prepend( ptr, "/dlls", sizeof("/dlls") - 1 );
 417         ptr = prepend( ptr, build_dir, strlen(build_dir) );
 418         if ((res = read_file( ptr, &data, size ))) goto done;
 419
 420         /* now as a program */
 421         ptr = file + pos;
 422         namelen = len + 1;
 423         if (namelen > 4 && !memcmp( ptr + namelen - 4, ".exe", 4 )) namelen -= 4;
 424         ptr = prepend( ptr, ptr, namelen );
 425         ptr = prepend( ptr, "/programs", sizeof("/programs") - 1 );
 426         ptr = prepend( ptr, build_dir, strlen(build_dir) );
 427         if ((res = read_file( ptr, &data, size ))) goto done;
 428     }
 429
 430     file[pos + len + 1] = 0;
 431     for (i = 0; (path = wine_dll_enum_load_path( i )); i++)
 432     {
 433         ptr = prepend( file + pos, "/fakedlls", sizeof("/fakedlls") - 1 );
 434         ptr = prepend( ptr, path, strlen(path) );
 435         if ((res = read_file( ptr, &data, size ))) break;
 436     }
 437
 438 done:
 439     HeapFree( GetProcessHeap(), 0, file );
 440     if (res == 1) return data;
 441     return NULL;
 442 }
 443
 444 /* create the fake dll destination file */
 445 static HANDLE create_dest_file( const WCHAR *name )
 446 {
 447     /* first check for an existing file */
 448     HANDLE h = CreateFileW( name, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL );
 449     if (h != INVALID_HANDLE_VALUE)
 450     {
 451         if (!is_fake_dll( h ))
 452         {
 453             TRACE( "%s is not a fake dll, not overwriting it\n", debugstr_w(name) );
 454             CloseHandle( h );
 455             return 0;
 456         }
 457         /* truncate the file */
 458         SetFilePointer( h, 0, NULL, FILE_BEGIN );
 459         SetEndOfFile( h );
 460     }
 461     else
 462     {
 463         if (GetLastError() == ERROR_PATH_NOT_FOUND) create_directories( name );
 464
 465         h = CreateFileW( name, GENERIC_WRITE, 0, NULL, CREATE_NEW, 0, NULL );
 466         if (h == INVALID_HANDLE_VALUE)
 467             ERR( "failed to create %s (error=%u)\n", debugstr_w(name), GetLastError() );
 468     }
 469     return h;
 470 }
 471
 472 /* copy a fake dll file to the dest directory */
 473 static void install_fake_dll( WCHAR *dest, char *file, const char *ext )
 474 {
 475     int ret;
 476     size_t size;
 477     void *data;
 478     DWORD written;
 479     WCHAR *destname = dest + strlenW(dest);
 480     char *name = strrchr( file, '/' ) + 1;
 481     char *end = name + strlen(name);
 482
 483     if (ext) strcpy( end, ext );
 484     if (!(ret = read_file( file, &data, &size ))) return;
 485
 486     if (end > name + 2 && !strncmp( end - 2, "16", 2 )) end -= 2;  /* remove "16" suffix */
 487     dll_name_AtoW( destname, name, end - name );
 488     if (!add_handled_dll( destname )) ret = -1;
 489
 490     if (ret != -1)
 491     {
 492         HANDLE h = create_dest_file( dest );
 493
 494         if (h && h != INVALID_HANDLE_VALUE)
 495         {
 496             TRACE( "%s -> %s\n", debugstr_a(file), debugstr_w(dest) );
 497
 498             ret = (WriteFile( h, data, size, &written, NULL ) && written == size);
 499             if (!ret) ERR( "failed to write to %s (error=%u)\n", debugstr_w(dest), GetLastError() );
 500             CloseHandle( h );
 501             if (!ret) DeleteFileW( dest );
 502         }
 503     }
 504     *destname = 0;  /* restore it for next file */
 505 }
 506
 507 /* find and install all fake dlls in a given lib directory */
 508 static void install_lib_dir( WCHAR *dest, char *file, const char *default_ext )
 509 {
 510     DIR *dir;
 511     struct dirent *de;
 512     char *name;
 513
 514     if (!(dir = opendir( file ))) return;
 515     name = file + strlen(file);
 516     *name++ = '/';
 517     while ((de = readdir( dir )))
 518     {
 519         if (strlen( de->d_name ) > max_dll_name_len) continue;
 520         if (!strcmp( de->d_name, "." )) continue;
 521         if (!strcmp( de->d_name, ".." )) continue;
 522         strcpy( name, de->d_name );
 523         if (default_ext)  /* inside build dir */
 524         {
 525             strcat( name, "/" );
 526             strcat( name, de->d_name );
 527             if (!strchr( de->d_name, '.' )) strcat( name, default_ext );
 528             install_fake_dll( dest, file, ".fake" );
 529         }
 530         else install_fake_dll( dest, file, NULL );
 531     }
 532     closedir( dir );
 533 }
 534
 535 /* create fake dlls in dirname for all the files we can find */
 536 static BOOL create_wildcard_dlls( const WCHAR *dirname )
 537 {
 538     const char *build_dir = wine_get_build_dir();
 539     const char *path;
 540     unsigned int i, maxlen = 0;
 541     char *file;
 542     WCHAR *dest;
 543
 544     if (build_dir) maxlen = strlen(build_dir) + sizeof("/programs/");
 545     for (i = 0; (path = wine_dll_enum_load_path(i)); i++) maxlen = max( maxlen, strlen(path) );
 546     maxlen += 2 * max_dll_name_len + 2 + sizeof(".dll.fake");
 547     if (!(file = HeapAlloc( GetProcessHeap(), 0, maxlen ))) return FALSE;
 548
 549     if (!(dest = HeapAlloc( GetProcessHeap(), 0, (strlenW(dirname) + max_dll_name_len) * sizeof(WCHAR) )))
 550     {
 551         HeapFree( GetProcessHeap(), 0, file );
 552         return FALSE;
 553     }
 554     strcpyW( dest, dirname );
 555     dest[strlenW(dest) - 1] = 0;  /* remove wildcard */
 556
 557     if (build_dir)
 558     {
 559         strcpy( file, build_dir );
 560         strcat( file, "/dlls" );
 561         install_lib_dir( dest, file, ".dll" );
 562         strcpy( file, build_dir );
 563         strcat( file, "/programs" );
 564         install_lib_dir( dest, file, ".exe" );
 565     }
 566     for (i = 0; (path = wine_dll_enum_load_path( i )); i++)
 567     {
 568         strcpy( file, path );
 569         strcat( file, "/fakedlls" );
 570         install_lib_dir( dest, file, NULL );
 571     }
 572     HeapFree( GetProcessHeap(), 0, file );
 573     HeapFree( GetProcessHeap(), 0, dest );
 574     return TRUE;
 575 }
 576
 577 /***********************************************************************
 578  *            create_fake_dll
 579  */
 580 BOOL create_fake_dll( const WCHAR *name, const WCHAR *source )
 581 {
 582     HANDLE h;
 583     BOOL ret;
 584     size_t size;
 585     const WCHAR *filename;
 586     void *buffer;
 587
 588     if (!(filename = strrchrW( name, '\\' ))) filename = name;
 589     else filename++;
 590
 591     /* check for empty name which means to only create the directory */
 592     if (!filename[0])
 593     {
 594         create_directories( name );
 595         return TRUE;
 596     }
 597     if (filename[0] == '*' && !filename[1]) return create_wildcard_dlls( name );
 598
 599     add_handled_dll( filename );
 600
 601     if (!(h = create_dest_file( name ))) return TRUE;  /* not a fake dll */
 602     if (h == INVALID_HANDLE_VALUE) return FALSE;
 603
 604     if (source[0] == '-' && !source[1])
 605     {
 606         /* '-' source means delete the file */
 607         TRACE( "deleting %s\n", debugstr_w(name) );
 608         ret = FALSE;
 609     }
 610     else if ((buffer = load_fake_dll( source, &size )))
 611     {
 612         DWORD written;
 613
 614         ret = (WriteFile( h, buffer, size, &written, NULL ) && written == size);
 615         if (!ret) ERR( "failed to write to %s (error=%u)\n", debugstr_w(name), GetLastError() );
 616     }
 617     else
 618     {
 619         WARN( "fake dll %s not found for %s\n", debugstr_w(source), debugstr_w(name) );
 620         ret = build_fake_dll( h );
 621     }
 622
 623     CloseHandle( h );
 624     if (!ret) DeleteFileW( name );
 625     return ret;
 626 }
 627
 628
 629 /***********************************************************************
 630  *            cleanup_fake_dlls
 631  */
 632 void cleanup_fake_dlls(void)
 633 {
 634     HeapFree( GetProcessHeap(), 0, file_buffer );
 635     file_buffer = NULL;
 636     HeapFree( GetProcessHeap(), 0, handled_dlls );
 637     handled_dlls = NULL;
 638     handled_count = handled_total = 0;
 639 }