2019-08-12 15:36:48 +08:00
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/* File descriptor related functions.
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2022-01-03 17:42:10 +08:00
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Copyright (C) 2019-2022 Free Software Foundation, Inc.
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2019-08-12 15:36:48 +08:00
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This file is part of the libiberty library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "config.h"
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#include "ansidecl.h"
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#include "libiberty.h"
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#if defined (_WIN32)
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h> /* for GetFullPathName */
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#endif
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/* Return true when FD file descriptor exists. */
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int
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is_valid_fd (int fd)
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{
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#if defined(_WIN32)
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HANDLE h = (HANDLE) _get_osfhandle (fd);
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return h != (HANDLE) -1;
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#elif defined(F_GETFD)
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return fcntl (fd, F_GETFD) >= 0;
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#else
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return dup2 (fd, fd) < 0;
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#endif
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}
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