plugins/gethostbyname.h

   1 /*
   2  *  This file is a ghastly hack because nobody can agree on
   3  *  gethostbyname_r()'s prototype.
   4  *
   5  *  Copyright (C) 2001,2002  Brian Stafford  <brian@stafford.uklinux.net>
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * $Id$
  22  */
  23
  24 /*************************************************************************
  25    Usage:
  26
  27    #include <errno.h>
  28    #include "gethostbyname.h"
  29
  30    f ()
  31    {
  32      struct ghbnctx ctx;
  33
  34      errno = 0;
  35      hp = gethostbyname_ctx (host, &ctx);
  36      if (hp == NULL)
  37        {
  38          if (errno != 0)
  39            handle_value_of_errno (errno);
  40          else
  41            handle_value_of_h_errno (h_error_ctx (&ctx));
  42        }
  43      else
  44        {
  45          ...
  46        }
  47      free_ghbnctx (&ctx);
  48    }
  49  *************************************************************************/
  50
  51 #ifndef _gethostbyname_h
  52 #define _gethostbyname_h
  53
  54 #if HAVE_GETIPNODEBYNAME
  55
  56 struct ghbnctx
  57   {
  58     int h_err;
  59     struct hostent *hostent;
  60   };
  61
  62 #elif HAVE_GETHOSTBYNAME_R == 6
  63
  64 struct ghbnctx
  65   {
  66     int h_err;
  67     struct hostent hostent;
  68     char *hostbuf;
  69     size_t hostbuf_len;
  70   };
  71
  72 #elif HAVE_GETHOSTBYNAME_R == 5
  73
  74 struct ghbnctx
  75   {
  76     int h_err;
  77     struct hostent hostent;
  78     char *hostbuf;
  79     int hostbuf_len;
  80   };
  81
  82 #elif HAVE_GETHOSTBYNAME_R == 3
  83
  84 struct ghbnctx
  85   {
  86     int h_err;
  87     struct hostent_data hostent_data;
  88     struct hostent hostent;
  89   };
  90
  91 #else
  92
  93 struct ghbnctx
  94   {
  95     int h_err;
  96   };
  97
  98 #endif
  99
 100 struct hostent *gethostbyname_ctx (const char *host, struct ghbnctx *ctx);
 101 int h_error_ctx (struct ghbnctx *ctx);
 102 void free_ghbnctx (struct ghbnctx *ctx);
 103
 104 #endif
 105