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/* $Id: nocrt-open.cpp $ */
/** @file
* IPRT - No-CRT - read().
*/
/*
* Copyright (C) 2022-2023 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/fcntl.h>
#include <iprt/nocrt/errno.h>
#include <iprt/assert.h>
#include <iprt/assertcompile.h>
#include <iprt/errcore.h>
#include <iprt/file.h>
#undef open
int RT_NOCRT(open)(const char *pszFilename, uint64_t fFlags, ... /*RTFMODE fMode*/)
{
/*
* Make fFlags into proper RTFILE_O_XXX.
*/
/* Make sure we got exactly one RTFILE_O_ACTION_MASK value: */
AssertCompile(O_CREAT == RTFILE_O_OPEN_CREATE); AssertCompile(RT_IS_POWER_OF_TWO(O_CREAT));
AssertCompile(O_EXCL == RTFILE_O_CREATE); AssertCompile(RT_IS_POWER_OF_TWO(O_EXCL));
if (fFlags & O_CREAT)
{
if (fFlags & O_EXCL)
fFlags &= ~(uint64_t)O_CREAT;
va_list va;
va_start(va, fFlags);
int fMode = va_arg(va, int);
va_end(va);
fFlags &= ~(uint64_t)RTFILE_O_CREATE_MODE_MASK;
fFlags |= ((uint64_t)fMode << RTFILE_O_CREATE_MODE_SHIFT) & RTFILE_O_CREATE_MODE_MASK;
}
else
{
if (fFlags & O_EXCL)
fFlags &= ~(uint64_t)O_EXCL;
fFlags |= RTFILE_O_OPEN;
}
/* Close on exec / inherit flag needs inverting: */
AssertCompile(O_CLOEXEC == RTFILE_O_INHERIT);
fFlags ^= O_CLOEXEC;
/* Add deny selection: */
fFlags |= RTFILE_O_DENY_NONE;
/*
* Try open it.
*/
RTFILE hFile = NIL_RTFILE;
int rc = RTFileOpen(&hFile, pszFilename, fFlags);
if (RT_SUCCESS(rc))
{
intptr_t fd = RTFileToNative(hFile);
if ((int)fd == fd)
return (int)fd;
AssertMsgFailed(("fd=%zd (%p)\n", fd, fd));
RTFileClose(hFile);
rc = VERR_INTERNAL_ERROR;
}
errno = RTErrConvertToErrno(rc);
return -1;
}
RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(open);
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