Automatic date update in version.in
[binutils-gdb.git] / libiberty / filedescriptor.c
blob87223981aa743045632671d60e3f51c733e89117
1 /* File descriptor related functions.
3 Copyright (C) 2019-2024 Free Software Foundation, Inc.
5 This file is part of the libiberty library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 #include "config.h"
23 #include "ansidecl.h"
24 #include "libiberty.h"
26 #ifdef HAVE_FCNTL_H
27 #include <fcntl.h>
28 #endif
30 #if defined (_WIN32)
31 #define WIN32_LEAN_AND_MEAN
32 #include <windows.h> /* for GetFullPathName */
33 #endif
34 /* Return true when FD file descriptor exists. */
36 int
37 is_valid_fd (int fd)
39 #if defined(_WIN32)
40 HANDLE h = (HANDLE) _get_osfhandle (fd);
41 return h != (HANDLE) -1;
42 #elif defined(F_GETFD)
43 return fcntl (fd, F_GETFD) >= 0;
44 #else
45 return dup2 (fd, fd) < 0;
46 #endif