dlls/spoolss/router.c

   1 /*
   2  * Routing for Spooler-Service helper DLL
   3  *
   4  * Copyright 2006-2009 Detlef Riekenberg
   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 "winbase.h"
  25 #include "winerror.h"
  26 #include "winreg.h"
  27
  28 #include "wingdi.h"
  29 #include "winspool.h"
  30 #include "ddk/winsplp.h"
  31 #include "spoolss.h"
  32
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(spoolss);
  36
  37 /* ################################ */
  38
  39 #define MAX_BACKEND 3
  40
  41 typedef struct {
  42     /* PRINTPROVIDOR functions */
  43     DWORD  (WINAPI *fpOpenPrinter)(LPWSTR, HANDLE *, LPPRINTER_DEFAULTSW);
  44     DWORD  (WINAPI *fpSetJob)(HANDLE, DWORD, DWORD, LPBYTE, DWORD);
  45     DWORD  (WINAPI *fpGetJob)(HANDLE, DWORD, DWORD, LPBYTE, DWORD, LPDWORD);
  46     DWORD  (WINAPI *fpEnumJobs)(HANDLE, DWORD, DWORD, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  47     HANDLE (WINAPI *fpAddPrinter)(LPWSTR, DWORD, LPBYTE);
  48     DWORD  (WINAPI *fpDeletePrinter)(HANDLE);
  49     DWORD  (WINAPI *fpSetPrinter)(HANDLE, DWORD, LPBYTE, DWORD);
  50     DWORD  (WINAPI *fpGetPrinter)(HANDLE, DWORD, LPBYTE, DWORD, LPDWORD);
  51     DWORD  (WINAPI *fpEnumPrinters)(DWORD, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  52     DWORD  (WINAPI *fpAddPrinterDriver)(LPWSTR, DWORD, LPBYTE);
  53     DWORD  (WINAPI *fpEnumPrinterDrivers)(LPWSTR, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  54     DWORD  (WINAPI *fpGetPrinterDriver)(HANDLE, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD);
  55     DWORD  (WINAPI *fpGetPrinterDriverDirectory)(LPWSTR, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD);
  56     DWORD  (WINAPI *fpDeletePrinterDriver)(LPWSTR, LPWSTR, LPWSTR);
  57     DWORD  (WINAPI *fpAddPrintProcessor)(LPWSTR, LPWSTR, LPWSTR, LPWSTR);
  58     DWORD  (WINAPI *fpEnumPrintProcessors)(LPWSTR, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  59     DWORD  (WINAPI *fpGetPrintProcessorDirectory)(LPWSTR, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD);
  60     DWORD  (WINAPI *fpDeletePrintProcessor)(LPWSTR, LPWSTR, LPWSTR);
  61     DWORD  (WINAPI *fpEnumPrintProcessorDatatypes)(LPWSTR, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  62     DWORD  (WINAPI *fpStartDocPrinter)(HANDLE, DWORD, LPBYTE);
  63     DWORD  (WINAPI *fpStartPagePrinter)(HANDLE);
  64     DWORD  (WINAPI *fpWritePrinter)(HANDLE, LPVOID, DWORD, LPDWORD);
  65     DWORD  (WINAPI *fpEndPagePrinter)(HANDLE);
  66     DWORD  (WINAPI *fpAbortPrinter)(HANDLE);
  67     DWORD  (WINAPI *fpReadPrinter)(HANDLE, LPVOID, DWORD, LPDWORD);
  68     DWORD  (WINAPI *fpEndDocPrinter)(HANDLE);
  69     DWORD  (WINAPI *fpAddJob)(HANDLE, DWORD, LPBYTE, DWORD, LPDWORD);
  70     DWORD  (WINAPI *fpScheduleJob)(HANDLE, DWORD);
  71     DWORD  (WINAPI *fpGetPrinterData)(HANDLE, LPWSTR, LPDWORD, LPBYTE, DWORD, LPDWORD);
  72     DWORD  (WINAPI *fpSetPrinterData)(HANDLE, LPWSTR, DWORD, LPBYTE, DWORD);
  73     DWORD  (WINAPI *fpWaitForPrinterChange)(HANDLE, DWORD);
  74     DWORD  (WINAPI *fpClosePrinter)(HANDLE);
  75     DWORD  (WINAPI *fpAddForm)(HANDLE, DWORD, LPBYTE);
  76     DWORD  (WINAPI *fpDeleteForm)(HANDLE, LPWSTR);
  77     DWORD  (WINAPI *fpGetForm)(HANDLE, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD);
  78     DWORD  (WINAPI *fpSetForm)(HANDLE, LPWSTR, DWORD, LPBYTE);
  79     DWORD  (WINAPI *fpEnumForms)(HANDLE, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  80     DWORD  (WINAPI *fpEnumMonitors)(LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  81     DWORD  (WINAPI *fpEnumPorts)(LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD, LPDWORD);
  82     DWORD  (WINAPI *fpAddPort)(LPWSTR, HWND, LPWSTR);
  83     DWORD  (WINAPI *fpConfigurePort)(LPWSTR, HWND, LPWSTR);
  84     DWORD  (WINAPI *fpDeletePort)(LPWSTR, HWND, LPWSTR);
  85     HANDLE (WINAPI *fpCreatePrinterIC)(HANDLE, LPDEVMODEW);
  86     DWORD  (WINAPI *fpPlayGdiScriptOnPrinterIC)(HANDLE, LPBYTE, DWORD, LPBYTE, DWORD, DWORD);
  87     DWORD  (WINAPI *fpDeletePrinterIC)(HANDLE);
  88     DWORD  (WINAPI *fpAddPrinterConnection)(LPWSTR);
  89     DWORD  (WINAPI *fpDeletePrinterConnection)(LPWSTR);
  90     DWORD  (WINAPI *fpPrinterMessageBox)(HANDLE, DWORD, HWND, LPWSTR, LPWSTR, DWORD);
  91     DWORD  (WINAPI *fpAddMonitor)(LPWSTR, DWORD, LPBYTE);
  92     DWORD  (WINAPI *fpDeleteMonitor)(LPWSTR, LPWSTR, LPWSTR);
  93     DWORD  (WINAPI *fpResetPrinter)(HANDLE, LPPRINTER_DEFAULTSW);
  94     DWORD  (WINAPI *fpGetPrinterDriverEx)(HANDLE, LPWSTR, DWORD, LPBYTE, DWORD, LPDWORD, DWORD, DWORD, PDWORD, PDWORD);
  95     HANDLE (WINAPI *fpFindFirstPrinterChangeNotification)(HANDLE, DWORD, DWORD, LPVOID);
  96     DWORD  (WINAPI *fpFindClosePrinterChangeNotification)(HANDLE);
  97     DWORD  (WINAPI *fpAddPortEx)(HANDLE, LPWSTR, DWORD, LPBYTE, LPWSTR);
  98     DWORD  (WINAPI *fpShutDown)(LPVOID);
  99     DWORD  (WINAPI *fpRefreshPrinterChangeNotification)(HANDLE, DWORD, PVOID, PVOID);
 100     DWORD  (WINAPI *fpOpenPrinterEx)(LPWSTR, LPHANDLE, LPPRINTER_DEFAULTSW, LPBYTE, DWORD);
 101     HANDLE (WINAPI *fpAddPrinterEx)(LPWSTR, DWORD, LPBYTE, LPBYTE, DWORD);
 102     DWORD  (WINAPI *fpSetPort)(LPWSTR, LPWSTR, DWORD, LPBYTE);
 103     DWORD  (WINAPI *fpEnumPrinterData)(HANDLE, DWORD, LPWSTR, DWORD, LPDWORD, LPDWORD, LPBYTE, DWORD, LPDWORD);
 104     DWORD  (WINAPI *fpDeletePrinterData)(HANDLE, LPWSTR);
 105     DWORD  (WINAPI *fpClusterSplOpen)(LPCWSTR, LPCWSTR, PHANDLE, LPCWSTR, LPCWSTR);
 106     DWORD  (WINAPI *fpClusterSplClose)(HANDLE);
 107     DWORD  (WINAPI *fpClusterSplIsAlive)(HANDLE);
 108     DWORD  (WINAPI *fpSetPrinterDataEx)(HANDLE, LPCWSTR, LPCWSTR, DWORD, LPBYTE, DWORD);
 109     DWORD  (WINAPI *fpGetPrinterDataEx)(HANDLE, LPCWSTR, LPCWSTR, LPDWORD, LPBYTE, DWORD, LPDWORD);
 110     DWORD  (WINAPI *fpEnumPrinterDataEx)(HANDLE, LPCWSTR, LPBYTE, DWORD, LPDWORD, LPDWORD);
 111     DWORD  (WINAPI *fpEnumPrinterKey)(HANDLE, LPCWSTR, LPWSTR, DWORD, LPDWORD);
 112     DWORD  (WINAPI *fpDeletePrinterDataEx)(HANDLE, LPCWSTR, LPCWSTR);
 113     DWORD  (WINAPI *fpDeletePrinterKey)(HANDLE hPrinter, LPCWSTR pKeyName);
 114     DWORD  (WINAPI *fpSeekPrinter)(HANDLE, LARGE_INTEGER, PLARGE_INTEGER, DWORD, BOOL);
 115     DWORD  (WINAPI *fpDeletePrinterDriverEx)(LPWSTR, LPWSTR, LPWSTR, DWORD, DWORD);
 116     DWORD  (WINAPI *fpAddPerMachineConnection)(LPCWSTR, LPCWSTR, LPCWSTR, LPCWSTR);
 117     DWORD  (WINAPI *fpDeletePerMachineConnection)(LPCWSTR, LPCWSTR);
 118     DWORD  (WINAPI *fpEnumPerMachineConnections)(LPCWSTR, LPBYTE, DWORD, LPDWORD, LPDWORD);
 119     DWORD  (WINAPI *fpXcvData)(HANDLE, LPCWSTR, PBYTE, DWORD, PBYTE, DWORD, PDWORD, PDWORD);
 120     DWORD  (WINAPI *fpAddPrinterDriverEx)(LPWSTR, DWORD, LPBYTE, DWORD);
 121     DWORD  (WINAPI *fpSplReadPrinter)(HANDLE, LPBYTE *, DWORD);
 122     DWORD  (WINAPI *fpDriverUnloadComplete)(LPWSTR);
 123     DWORD  (WINAPI *fpGetSpoolFileInfo)(HANDLE, LPWSTR *, LPHANDLE, HANDLE, HANDLE);
 124     DWORD  (WINAPI *fpCommitSpoolData)(HANDLE, DWORD);
 125     DWORD  (WINAPI *fpCloseSpoolFileHandle)(HANDLE);
 126     DWORD  (WINAPI *fpFlushPrinter)(HANDLE, LPBYTE, DWORD, LPDWORD, DWORD);
 127     DWORD  (WINAPI *fpSendRecvBidiData)(HANDLE, LPCWSTR, LPBIDI_REQUEST_CONTAINER, LPBIDI_RESPONSE_CONTAINER *);
 128     DWORD  (WINAPI *fpAddDriverCatalog)(HANDLE, DWORD, VOID *, DWORD);
 129     /* Private Data */
 130     HMODULE dll;
 131     LPWSTR  dllname;
 132     LPWSTR  name;
 133     LPWSTR  regroot;
 134     DWORD   index;
 135 } backend_t;
 136
 137 /* ################################ */
 138
 139 static backend_t *backend[MAX_BACKEND];
 140 static DWORD used_backends = 0;
 141
 142 static CRITICAL_SECTION backend_cs;
 143 static CRITICAL_SECTION_DEBUG backend_cs_debug =
 144 {
 145     0, 0, &backend_cs,
 146     { &backend_cs_debug.ProcessLocksList, &backend_cs_debug.ProcessLocksList },
 147       0, 0, { (DWORD_PTR)(__FILE__ ": backend_cs") }
 148 };
 149 static CRITICAL_SECTION backend_cs = { &backend_cs_debug, -1, 0, 0, 0, 0 };
 150
 151 /* ################################ */
 152
 153 static WCHAR localsplW[] = {'l','o','c','a','l','s','p','l','.','d','l','l',0};
 154
 155 /******************************************************************
 156  * strdupW [internal]
 157  *
 158  * create a copy of a unicode-string
 159  *
 160  */
 161
 162 static LPWSTR strdupW(LPCWSTR p)
 163 {
 164     LPWSTR ret;
 165     DWORD len;
 166
 167     if(!p) return NULL;
 168     len = (lstrlenW(p) + 1) * sizeof(WCHAR);
 169     ret = heap_alloc(len);
 170     memcpy(ret, p, len);
 171     return ret;
 172 }
 173
 174 /******************************************************************
 175  * backend_unload_all [internal]
 176  *
 177  * unload all backends
 178  */
 179 void backend_unload_all(void)
 180 {
 181     EnterCriticalSection(&backend_cs);
 182     while (used_backends > 0) {
 183         used_backends--;
 184         FreeLibrary(backend[used_backends]->dll);
 185         heap_free(backend[used_backends]->dllname);
 186         heap_free(backend[used_backends]->name);
 187         heap_free(backend[used_backends]->regroot);
 188         heap_free(backend[used_backends]);
 189         backend[used_backends] = NULL;
 190     }
 191     LeaveCriticalSection(&backend_cs);
 192 }
 193
 194 /******************************************************************************
 195  * backend_load [internal]
 196  *
 197  * load and init a backend
 198  *
 199  * PARAMS
 200  *  name   [I] Printprovider to use for the backend. NULL for the local print provider
 201  *
 202  * RETURNS
 203  *  Success: PTR to the backend
 204  *  Failure: NULL
 205  *
 206  */
 207 static backend_t * backend_load(LPWSTR dllname, LPWSTR name, LPWSTR regroot)
 208 {
 209
 210     BOOL (WINAPI *pInitializePrintProvidor)(LPPRINTPROVIDOR, DWORD, LPWSTR);
 211     DWORD id;
 212     DWORD res;
 213
 214     TRACE("(%s, %s, %s)\n", debugstr_w(dllname), debugstr_w(name), debugstr_w(regroot));
 215
 216     EnterCriticalSection(&backend_cs);
 217     id = used_backends;
 218
 219     backend[id] = heap_alloc_zero(sizeof(backend_t));
 220     if (!backend[id]) {
 221         LeaveCriticalSection(&backend_cs);
 222         return NULL;
 223     }
 224
 225     backend[id]->dllname = strdupW(dllname);
 226     backend[id]->name = strdupW(name);
 227     backend[id]->regroot = strdupW(regroot);
 228
 229     backend[id]->dll = LoadLibraryW(dllname);
 230     if (backend[id]->dll) {
 231         pInitializePrintProvidor = (void *) GetProcAddress(backend[id]->dll, "InitializePrintProvidor");
 232         if (pInitializePrintProvidor) {
 233
 234             /* native localspl does not clear unused entries */
 235             res = pInitializePrintProvidor((PRINTPROVIDOR *) backend[id], sizeof(PRINTPROVIDOR), regroot);
 236             if (res) {
 237                 used_backends++;
 238                 backend[id]->index = used_backends;
 239                 LeaveCriticalSection(&backend_cs);
 240                 TRACE("--> backend #%d: %p (%s)\n", id, backend[id], debugstr_w(dllname));
 241                 return backend[id];
 242             }
 243         }
 244         FreeLibrary(backend[id]->dll);
 245     }
 246     heap_free(backend[id]->dllname);
 247     heap_free(backend[id]->name);
 248     heap_free(backend[id]->regroot);
 249     heap_free(backend[id]);
 250     backend[id] = NULL;
 251     LeaveCriticalSection(&backend_cs);
 252     WARN("failed to init %s: %u\n", debugstr_w(dllname), GetLastError());
 253     return NULL;
 254 }
 255
 256 /******************************************************************************
 257  * backend_load_all [internal]
 258  *
 259  * load and init all backends
 260  *
 261  * RETURNS
 262  *  Success: TRUE
 263  *  Failure: FALSE
 264  *
 265  */
 266 BOOL backend_load_all(void)
 267 {
 268     static BOOL failed = FALSE;
 269     backend_t * pb;
 270
 271     EnterCriticalSection(&backend_cs);
 272
 273     /* if we failed before, dont try again */
 274     if (!failed && (used_backends == 0)) {
 275         pb = backend_load(localsplW, NULL, NULL);
 276
 277         /* ToDo: parse the registry and load all other backends */
 278
 279         failed = (used_backends == 0);
 280     }
 281     LeaveCriticalSection(&backend_cs);
 282     TRACE("-> %d\n", !failed);
 283     return (!failed);
 284 }
 285
 286 /******************************************************************************
 287  * backend_first [internal]
 288  *
 289  * find the first usable backend
 290  *
 291  * RETURNS
 292  *  Success: PTR to the backend
 293  *  Failure: NULL
 294  *
 295  */
 296 static backend_t * backend_first(LPWSTR name)
 297 {
 298
 299     EnterCriticalSection(&backend_cs);
 300     /* Load all backends, when not done yet */
 301     if (used_backends || backend_load_all()) {
 302
 303         /* test for the local system first */
 304         if (!name || !name[0]) {
 305             LeaveCriticalSection(&backend_cs);
 306             return backend[0];
 307         }
 308     }
 309
 310     FIXME("server %s not supported in %d backends\n", debugstr_w(name), used_backends);
 311     LeaveCriticalSection(&backend_cs);
 312     return NULL;
 313 }
 314
 315 /******************************************************************
 316  * EnumMonitorsW (spoolss.@)
 317  *
 318  * Enumerate available Port-Monitors
 319  *
 320  * PARAMS
 321  *  pName      [I] Servername or NULL (local Computer)
 322  *  Level      [I] Structure-Level
 323  *  pMonitors  [O] PTR to Buffer that receives the Result
 324  *  cbBuf      [I] Size of Buffer at pMonitors
 325  *  pcbNeeded  [O] PTR to DWORD that receives the size in Bytes used / required for pMonitors
 326  *  pcReturned [O] PTR to DWORD that receives the number of Monitors in pMonitors
 327  *
 328  * RETURNS
 329  *  Success: TRUE
 330  *  Failure: FALSE and in pcbNeeded the Bytes required for pMonitors, if cbBuf is too small
 331  *
 332  */
 333 BOOL WINAPI EnumMonitorsW(LPWSTR pName, DWORD Level, LPBYTE pMonitors, DWORD cbBuf,
 334                           LPDWORD pcbNeeded, LPDWORD pcReturned)
 335 {
 336     backend_t * pb;
 337     DWORD res = ROUTER_UNKNOWN;
 338
 339     TRACE("(%s, %d, %p, %d, %p, %p)\n", debugstr_w(pName), Level, pMonitors,
 340           cbBuf, pcbNeeded, pcReturned);
 341
 342     if (pcbNeeded) *pcbNeeded = 0;
 343     if (pcReturned) *pcReturned = 0;
 344
 345     pb = backend_first(pName);
 346     if (pb && pb->fpEnumMonitors)
 347         res = pb->fpEnumMonitors(pName, Level, pMonitors, cbBuf, pcbNeeded, pcReturned);
 348     else
 349     {
 350         SetLastError(ERROR_PROC_NOT_FOUND);
 351     }
 352
 353     TRACE("got %u with %u (%u byte for %u entries)\n\n", res, GetLastError(),
 354             pcbNeeded ? *pcbNeeded : 0, pcReturned ? *pcReturned : 0);
 355
 356     return (res == ROUTER_SUCCESS);
 357 }
 358
 359 /******************************************************************
 360  * EnumPortsW (spoolss.@)
 361  *
 362  * Enumerate available Ports
 363  *
 364  * PARAMS
 365  *  pName      [I] Servername or NULL (local Computer)
 366  *  Level      [I] Structure-Level (1 or 2)
 367  *  pPorts     [O] PTR to Buffer that receives the Result
 368  *  cbBuf      [I] Size of Buffer at pPorts
 369  *  pcbNeeded  [O] PTR to DWORD that receives the size in Bytes used / required for pPorts
 370  *  pcReturned [O] PTR to DWORD that receives the number of Ports in pPorts
 371  *
 372  * RETURNS
 373  *  Success: TRUE
 374  *  Failure: FALSE and in pcbNeeded the Bytes required for pPorts, if cbBuf is too small
 375  *
 376  */
 377 BOOL WINAPI EnumPortsW(LPWSTR pName, DWORD Level, LPBYTE pPorts, DWORD cbBuf,
 378                        LPDWORD pcbNeeded, LPDWORD pcReturned)
 379 {
 380     backend_t * pb;
 381     DWORD res = ROUTER_UNKNOWN;
 382
 383     TRACE("(%s, %d, %p, %d, %p, %p)\n", debugstr_w(pName), Level, pPorts, cbBuf,
 384             pcbNeeded, pcReturned);
 385
 386     if (pcbNeeded) *pcbNeeded = 0;
 387     if (pcReturned) *pcReturned = 0;
 388
 389     pb = backend_first(pName);
 390     if (pb && pb->fpEnumPorts)
 391         res = pb->fpEnumPorts(pName, Level, pPorts, cbBuf, pcbNeeded, pcReturned);
 392     else
 393     {
 394         SetLastError(ERROR_PROC_NOT_FOUND);
 395     }
 396
 397     TRACE("got %u with %u (%u byte for %u entries)\n", res, GetLastError(),
 398             pcbNeeded ? *pcbNeeded : 0, pcReturned ? *pcReturned : 0);
 399
 400     return (res == ROUTER_SUCCESS);
 401 }
 402
 403 /******************************************************************
 404  * GetPrinterDriverDirectoryW (spoolss.@)
 405  *
 406  * Return the PATH for the Printer-Drivers
 407  *
 408  * PARAMS
 409  *   pName            [I] Servername or NULL (local Computer)
 410  *   pEnvironment     [I] Printing-Environment or NULL (Default)
 411  *   Level            [I] Structure-Level (must be 1)
 412  *   pDriverDirectory [O] PTR to Buffer that receives the Result
 413  *   cbBuf            [I] Size of Buffer at pDriverDirectory
 414  *   pcbNeeded        [O] PTR to DWORD that receives the size in Bytes used /
 415  *                        required for pDriverDirectory
 416  *
 417  * RETURNS
 418  *   Success: TRUE  and in pcbNeeded the Bytes used in pDriverDirectory
 419  *   Failure: FALSE and in pcbNeeded the Bytes required for pDriverDirectory,
 420  *   if cbBuf is too small
 421  *
 422  *   Native Values returned in pDriverDirectory on Success:
 423  *|  NT(Windows NT x86): "%winsysdir%\\spool\\DRIVERS\\w32x86"
 424  *|  NT(Windows x64):    "%winsysdir%\\spool\\DRIVERS\\x64"
 425  *|  NT(Windows 4.0):    "%winsysdir%\\spool\\DRIVERS\\win40"
 426  *|  win9x(Windows 4.0): "%winsysdir%"
 427  *
 428  *   "%winsysdir%" is the Value from GetSystemDirectoryW()
 429  *
 430  */
 431 BOOL WINAPI GetPrinterDriverDirectoryW(LPWSTR pName, LPWSTR pEnvironment,
 432             DWORD Level, LPBYTE pDriverDirectory, DWORD cbBuf, LPDWORD pcbNeeded)
 433 {
 434     backend_t * pb;
 435     DWORD res = ROUTER_UNKNOWN;
 436
 437     TRACE("(%s, %s, %d, %p, %d, %p)\n", debugstr_w(pName),
 438           debugstr_w(pEnvironment), Level, pDriverDirectory, cbBuf, pcbNeeded);
 439
 440     if (pcbNeeded) *pcbNeeded = 0;
 441
 442     pb = backend_first(pName);
 443     if (pb && pb->fpGetPrinterDriverDirectory)
 444         res = pb->fpGetPrinterDriverDirectory(pName, pEnvironment, Level,
 445                                               pDriverDirectory, cbBuf, pcbNeeded);
 446     else
 447     {
 448         SetLastError(ERROR_PROC_NOT_FOUND);
 449     }
 450
 451     TRACE("got %u with %u (%u byte)\n",
 452             res, GetLastError(), pcbNeeded ? *pcbNeeded : 0);
 453
 454     return (res == ROUTER_SUCCESS);
 455
 456 }