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- /* File descriptor related functions.
- Copyright (C) 2019-2022 Free Software Foundation, Inc.
- This file is part of the libiberty library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor,
- Boston, MA 02110-1301, USA. */
- #include "config.h"
- #include "ansidecl.h"
- #include "libiberty.h"
- #ifdef HAVE_FCNTL_H
- #include <fcntl.h>
- #endif
- #if defined (_WIN32)
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h> /* for GetFullPathName */
- #endif
- /* Return true when FD file descriptor exists. */
- int
- is_valid_fd (int fd)
- {
- #if defined(_WIN32)
- HANDLE h = (HANDLE) _get_osfhandle (fd);
- return h != (HANDLE) -1;
- #elif defined(F_GETFD)
- return fcntl (fd, F_GETFD) >= 0;
- #else
- return dup2 (fd, fd) < 0;
- #endif
- }
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