/* $Id: nocrt-dup.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
/** @file
 * IPRT - No-CRT - dup().
 */

/*
 * Copyright (C) 2022-2024 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * 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, in version 3 of the
 * License.
 *
 * 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, see <https://www.gnu.org/licenses>.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
 * in the VirtualBox distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 *
 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#define IPRT_NO_CRT_FOR_3RD_PARTY
#include "internal/nocrt.h"
#include <iprt/nocrt/unistd.h>
#include <iprt/nocrt/errno.h>
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/file.h>


#undef dup
int RT_NOCRT(dup)(int fdSrc)
{
    RTFILE hFileSrc;
    int rc = RTFileFromNative(&hFileSrc, fdSrc);
    if (RT_SUCCESS(rc))
    {
        RTFILE hFileNew;
#if defined(RT_OS_WINDOWS) /* default on windows is noinherit */
        rc = RTFileDup(hFileSrc, 0, &hFileNew);
#else
        rc = RTFileDup(hFileSrc, RTFILE_O_INHERIT, &hFileNew);
#endif
        if (RT_SUCCESS(rc))
        {
            intptr_t fdNew = RTFileToNative(hFileNew);
            AssertMsg((int)fdNew == fdNew, ("%#zx\n", fdNew));
            if ((int)fdNew == fdNew)
                return (int)fdNew;
            RTFileClose(hFileNew);
            errno = EMFILE;
            return -1;
        }
    }
    errno = RTErrConvertToErrno(rc);
    return -1;
}
RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(dup);