common/init.c

   1 /* init.c - Various initializations
   2  *      Copyright (C) 2007 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GnuPG.
   5  *
   6  * GnuPG is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuPG 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21
  22 #ifdef WITHOUT_GNU_PTH /* Give the Makefile a chance to build without Pth.  */
  23 #undef HAVE_PTH
  24 #undef USE_GNU_PTH
  25 #endif
  26
  27 #ifdef HAVE_W32_SYSTEM
  28 #include <windows.h>
  29 #endif
  30 #ifdef HAVE_PTH
  31 #include <pth.h>
  32 #endif
  33
  34 #include "estream.h"
  35 #include "util.h"
  36
  37
  38 /* This function is to be used early at program startup to make sure
  39    that some subsystems are initialized.  This is in particular
  40    important for W32 to initialize the sockets so that our socket
  41    emulation code used directly as well as in libassuan may be used.
  42    It should best be called before any I/O is done so that setup
  43    required for logging is ready.  CAUTION: This might be called while
  44    running suid(root). */
  45 void
  46 init_common_subsystems (void)
  47 {
  48   /* Try to auto set the character set.  */
  49   set_native_charset (NULL);
  50
  51 #ifdef HAVE_W32_SYSTEM
  52   /* For W32 we need to initialize the socket layer.  This is because
  53      we use recv and send in libassuan as well as at some other
  54      places.  If we are building with PTH we let pth_init do it.  We
  55      can't do much on error so we ignore them.  An error would anyway
  56      later pop up if one of the socket functions is used. */
  57 # ifdef HAVE_PTH
  58   pth_init ();
  59 # else
  60  {
  61    WSADATA wsadat;
  62
  63    WSAStartup (0x202, &wsadat);
  64  }
  65 # endif /*!HAVE_PTH*/
  66 #endif
  67
  68   /* Initialize the Estream library. */
  69   es_init ();
  70 }
  71