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Annotation of src/external/gpl3/binutils/dist/libiberty/filedescriptor.c, Revision 1.1.1.1.2.2

1.1.1.1.2.2! martin      1: /* File descriptor related functions.
        !             2:
        !             3:    Copyright (C) 2019-2020 Free Software Foundation, Inc.
        !             4:
        !             5:    This file is part of the libiberty library.
        !             6:
        !             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.
        !            11:
        !            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.
        !            16:
        !            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.  */
        !            21:
        !            22: #include "config.h"
        !            23: #include "ansidecl.h"
        !            24: #include "libiberty.h"
        !            25:
        !            26: #ifdef HAVE_FCNTL_H
        !            27: #include <fcntl.h>
        !            28: #endif
        !            29:
        !            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.  */
        !            35:
        !            36: int
        !            37: is_valid_fd (int fd)
        !            38: {
        !            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
        !            47: }