programs/rpcss/rpcss_main.c

   1 /*
   2  * Copyright 2001, Ove Kåven, TransGaming Technologies Inc.
   3  * Copyright 2002 Greg Turner
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  *
  19  * ---- rpcss_main.c:
  20  *   Initialize and start serving requests.  Bail if rpcss already is
  21  *   running.
  22  *
  23  * ---- RPCSS.EXE:
  24  *
  25  *   Wine needs a server whose role is somewhat like that
  26  *   of rpcss.exe in windows.  This is not a clone of
  27  *   windows rpcss at all.  It has been given the same name, however,
  28  *   to provide for the possibility that at some point in the future,
  29  *   it may become interface compatible with the "real" rpcss.exe on
  30  *   Windows.
  31  *
  32  * ---- KNOWN BUGS / TODO:
  33  *
  34  *   o Service hooks are unimplemented (if you bother to implement
  35  *     these, also implement net.exe, at least for "net start" and
  36  *     "net stop" (should be pretty easy I guess, assuming the rest
  37  *     of the services API infrastructure works.
  38  *
  39  *   o Is supposed to use RPC, not random kludges, to map endpoints.
  40  *
  41  *   o Probably name services should be implemented here as well.
  42  *
  43  *   o Wine's named pipes (in general) may not interoperate with those of
  44  *     Windows yet (?)
  45  *
  46  *   o There is a looming problem regarding listening on privileged
  47  *     ports.  We will need to be able to coexist with SAMBA, and be able
  48  *     to function without running winelib code as root.  This may
  49  *     take some doing, including significant reconceptualization of the
  50  *     role of rpcss.exe in wine.
  51  *
  52  *   o Who knows?  Whatever rpcss does, we ought to at
  53  *     least think about doing... but what /does/ it do?
  54  */
  55
  56 #include <stdio.h>
  57 #include <limits.h>
  58 #include <assert.h>
  59
  60 #define NONAMELESSUNION
  61 #define NONAMELESSSTRUCT
  62 #include "rpcss.h"
  63 #include "winnt.h"
  64
  65 #include "wine/debug.h"
  66
  67 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  68
  69 static HANDLE master_mutex;
  70 static HANDLE exit_event;
  71
  72 extern HANDLE __wine_make_process_system(void);
  73
  74 HANDLE RPCSS_GetMasterMutex(void)
  75 {
  76   return master_mutex;
  77 }
  78
  79 static BOOL RPCSS_work(HANDLE exit_event)
  80 {
  81   return RPCSS_NPDoWork(exit_event);
  82 }
  83
  84 static BOOL RPCSS_Initialize(void)
  85 {
  86   WINE_TRACE("\n");
  87
  88   exit_event = __wine_make_process_system();
  89
  90   master_mutex = CreateMutexA( NULL, FALSE, RPCSS_MASTER_MUTEX_NAME);
  91   if (!master_mutex) {
  92     WINE_ERR("Failed to create master mutex\n");
  93     return FALSE;
  94   }
  95
  96   if (!RPCSS_BecomePipeServer()) {
  97     WINE_WARN("Server already running: exiting.\n");
  98
  99     CloseHandle(master_mutex);
 100     master_mutex = NULL;
 101
 102     return FALSE;
 103   }
 104
 105   return TRUE;
 106 }
 107
 108 /* returns false if we discover at the last moment that we
 109    aren't ready to terminate */
 110 static BOOL RPCSS_Shutdown(void)
 111 {
 112   if (!RPCSS_UnBecomePipeServer())
 113     return FALSE;
 114
 115   if (!CloseHandle(master_mutex))
 116     WINE_WARN("Failed to release master mutex\n");
 117
 118   master_mutex = NULL;
 119
 120   CloseHandle(exit_event);
 121
 122   return TRUE;
 123 }
 124
 125 static void RPCSS_MainLoop(void)
 126 {
 127   WINE_TRACE("\n");
 128
 129   while ( RPCSS_work(exit_event) )
 130       ;
 131 }
 132
 133 int main( int argc, char **argv )
 134 {
 135   /*
 136    * We are invoked as a standard executable; we act in a
 137    * "lazy" manner.  We open up our pipe, and hang around until we all
 138    * user processes exit, and then silently terminate.
 139    */
 140
 141   if (RPCSS_Initialize()) {
 142     RPCSS_MainLoop();
 143     RPCSS_Shutdown();
 144   }
 145
 146   return 0;
 147 }