lib/close.c

   1 /* close replacement.
   2    Copyright (C) 2008-2017 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 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 General Public License for more details.
  13
  14    You should have received a copy of the GNU 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 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  26 # include "msvc-inval.h"
  27 #endif
  28
  29 #undef close
  30
  31 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  32 static int
  33 close_nothrow (int fd)
  34 {
  35   int result;
  36
  37   TRY_MSVC_INVAL
  38     {
  39       result = close (fd);
  40     }
  41   CATCH_MSVC_INVAL
  42     {
  43       result = -1;
  44       errno = EBADF;
  45     }
  46   DONE_MSVC_INVAL;
  47
  48   return result;
  49 }
  50 #else
  51 # define close_nothrow close
  52 #endif
  53
  54 /* Override close() to call into other gnulib modules.  */
  55
  56 int
  57 rpl_close (int fd)
  58 {
  59 #if WINDOWS_SOCKETS
  60   int retval = execute_all_close_hooks (close_nothrow, fd);
  61 #else
  62   int retval = close_nothrow (fd);
  63 #endif
  64
  65 #if REPLACE_FCHDIR
  66   if (retval >= 0)
  67     _gl_unregister_fd (fd);
  68 #endif
  69
  70   return retval;
  71 }