libc/inet/gai_strerror.c

   1 /* Copyright (C) 1997, 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Philip Blundell <pjb27@cam.ac.uk>, 1997.
   4
   5    The GNU C 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    The GNU C 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 the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <netdb.h>
  21
  22 static const struct
  23   {
  24     int code;
  25     const char *msg;
  26   }
  27 values[] =
  28   {
  29     { EAI_ADDRFAMILY, "Address family for hostname not supported" },
  30     { EAI_AGAIN, "Temporary failure in name resolution" },
  31     { EAI_BADFLAGS, "Bad value for ai_flags" },
  32     { EAI_FAIL, "Non-recoverable failure in name resolution" },
  33     { EAI_FAMILY, "ai_family not supported" },
  34     { EAI_MEMORY, "Memory allocation failure" },
  35     { EAI_NODATA, "No address associated with hostname" },
  36     { EAI_NONAME, "Name or service not known" },
  37     { EAI_SERVICE, "Servname not supported for ai_socktype" },
  38     { EAI_SOCKTYPE, "ai_socktype not supported" },
  39     { EAI_SYSTEM, "System error" },
  40     { EAI_INPROGRESS, "Processing request in progress" },
  41     { EAI_CANCELED, "Request canceled" },
  42     { EAI_NOTCANCELED, "Request not canceled" },
  43     { EAI_ALLDONE, "All requests done" },
  44     { EAI_INTR, "Interrupted by a signal" }
  45   };
  46
  47 const char *
  48 gai_strerror (int code)
  49 {
  50     size_t i;
  51     for (i = 0; i < sizeof (values) / sizeof (values[0]); ++i)
  52         if (values[i].code == code)
  53             return values[i].msg;
  54
  55     return "Unknown error";
  56 }