1 /* close replacement.
2    Copyright (C) 2008-2020 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 <https://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
close_nothrow(int fd)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
rpl_close(int fd)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 }
72