dlls/winspool.drv/wspool.c

   1 /******************************************************************************
   2  * Print Spooler Functions
   3  *
   4  *
   5  * Copyright 1999 Thuy Nguyen
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winspool.h"
  27 #include "winreg.h"
  28 #include "winternl.h"
  29 #include "ddk/winsplp.h"
  30 #include "wine/debug.h"
  31 #include "wine/unixlib.h"
  32
  33 #include "wspool.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(winspool);
  36
  37 /* ############################### */
  38
  39 static CRITICAL_SECTION backend_cs;
  40 static CRITICAL_SECTION_DEBUG backend_cs_debug =
  41 {
  42     0, 0, &backend_cs,
  43     { &backend_cs_debug.ProcessLocksList, &backend_cs_debug.ProcessLocksList },
  44       0, 0, { (DWORD_PTR)(__FILE__ ": backend_cs") }
  45 };
  46 static CRITICAL_SECTION backend_cs = { &backend_cs_debug, -1, 0, 0, 0, 0 };
  47
  48 /* ############################### */
  49
  50 HINSTANCE WINSPOOL_hInstance = NULL;
  51 unixlib_handle_t winspool_handle = 0;
  52
  53 static HMODULE hlocalspl;
  54 static BOOL (WINAPI *pInitializePrintProvidor)(LPPRINTPROVIDOR, DWORD, LPWSTR);
  55 PRINTPROVIDOR *backend = NULL;
  56
  57 /******************************************************************************
  58  * load_backend [internal]
  59  *
  60  * load and init our backend (the local printprovider: "localspl.dll")
  61  *
  62  * PARAMS
  63  *
  64  * RETURNS
  65  *  Success: TRUE
  66  *  Failure: FALSE and RPC_S_SERVER_UNAVAILABLE
  67  *
  68  * NOTES
  69  *  In windows, winspool.drv use RPC to interact with the spooler service
  70  *  (spoolsv.exe with spoolss.dll) and the spooler router (spoolss.dll) interact
  71  *  with the correct printprovider (localspl.dll for the local system)
  72  *
  73  */
  74 BOOL load_backend(void)
  75 {
  76     static PRINTPROVIDOR mybackend;
  77     DWORD res;
  78
  79     EnterCriticalSection(&backend_cs);
  80     hlocalspl = LoadLibraryA("localspl.dll");
  81     if (hlocalspl) {
  82         pInitializePrintProvidor = (void *) GetProcAddress(hlocalspl, "InitializePrintProvidor");
  83         if (pInitializePrintProvidor) {
  84
  85             /* native localspl does not clear unused entries */
  86             memset(&mybackend, 0, sizeof(mybackend));
  87             res = pInitializePrintProvidor(&mybackend, sizeof(mybackend), NULL);
  88             if (res) {
  89                 backend = &mybackend;
  90                 LeaveCriticalSection(&backend_cs);
  91                 TRACE("backend: %p (%p)\n", backend, hlocalspl);
  92                 return TRUE;
  93             }
  94         }
  95         FreeLibrary(hlocalspl);
  96     }
  97
  98     LeaveCriticalSection(&backend_cs);
  99
 100     WARN("failed to load the backend: %lu\n", GetLastError());
 101     SetLastError(RPC_S_SERVER_UNAVAILABLE);
 102     return FALSE;
 103 }
 104
 105 /******************************************************************************
 106  *  DllMain
 107  *
 108  * Winspool entry point.
 109  *
 110  */
 111 BOOL WINAPI DllMain( HINSTANCE instance, DWORD reason, void *reserved )
 112 {
 113     switch (reason)
 114     {
 115     case DLL_PROCESS_ATTACH:
 116         WINSPOOL_hInstance = instance;
 117         DisableThreadLibraryCalls( instance );
 118         if (!NtQueryVirtualMemory( GetCurrentProcess(), instance, MemoryWineUnixFuncs,
 119                                    &winspool_handle, sizeof(winspool_handle), NULL ))
 120             UNIX_CALL( process_attach, NULL );
 121         WINSPOOL_LoadSystemPrinters();
 122         break;
 123
 124     case DLL_PROCESS_DETACH:
 125         if (reserved) break;
 126         DeleteCriticalSection(&backend_cs);
 127         FreeLibrary(hlocalspl);
 128         break;
 129     }
 130
 131     return TRUE;
 132 }