lib/close.c

   1 /* close replacement.
   2    Copyright (C) 2008-2014 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <unistd.h>
  21
  22 #include <errno.h>
  23
  24 #include "fd-hook.h"
  25 #include "msvc-inval.h"
  26
  27 #undef close
  28
  29 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  30 static int
  31 close_nothrow (int fd)
  32 {
  33   int result;
  34
  35   TRY_MSVC_INVAL
  36     {
  37       result = close (fd);
  38     }
  39   CATCH_MSVC_INVAL
  40     {
  41       result = -1;
  42       errno = EBADF;
  43     }
  44   DONE_MSVC_INVAL;
  45
  46   return result;
  47 }
  48 #else
  49 # define close_nothrow close
  50 #endif
  51
  52 /* Override close() to call into other gnulib modules.  */
  53
  54 int
  55 rpl_close (int fd)
  56 {
  57 #if WINDOWS_SOCKETS
  58   int retval = execute_all_close_hooks (close_nothrow, fd);
  59 #else
  60   int retval = close_nothrow (fd);
  61 #endif
  62
  63 #if REPLACE_FCHDIR
  64   if (retval >= 0)
  65     _gl_unregister_fd (fd);
  66 #endif
  67
  68   return retval;
  69 }