1 /* Duplicate an open file descriptor.
3 Copyright (C) 2011-2021 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program 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
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
25 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
26 # include "msvc-inval.h"
31 #if defined _WIN32 && !defined __CYGWIN__
32 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
52 # define dup_nothrow _dup
54 #elif defined __KLIBC__
56 # include <sys/stat.h>
58 # include <InnoTekLIBC/backend.h>
67 if (dupfd == -1 && errno == ENOTSUP \
68 && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
72 /* Get a path from fd */
73 if (!__libc_Back_ioFHToPath (fd, path, sizeof (path)))
74 dupfd = open (path, O_RDONLY);
80 # define dup_nothrow dup
86 int result = dup_nothrow (fd);
89 result = _gl_register_dup (fd, result);