VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/file/nocrt-open.cpp@ 103795

Last change on this file since 103795 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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1/* $Id: nocrt-open.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * IPRT - No-CRT - read().
4 */
5
6/*
7 * Copyright (C) 2022-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#define IPRT_NO_CRT_FOR_3RD_PARTY
42#include "internal/nocrt.h"
43#include <iprt/nocrt/fcntl.h>
44#include <iprt/nocrt/errno.h>
45#include <iprt/assert.h>
46#include <iprt/assertcompile.h>
47#include <iprt/errcore.h>
48#include <iprt/file.h>
49
50
51#undef open
52int RT_NOCRT(open)(const char *pszFilename, uint64_t fFlags, ... /*RTFMODE fMode*/)
53{
54 /*
55 * Make fFlags into proper RTFILE_O_XXX.
56 */
57 /* Make sure we got exactly one RTFILE_O_ACTION_MASK value: */
58 AssertCompile(O_CREAT == RTFILE_O_OPEN_CREATE); AssertCompile(RT_IS_POWER_OF_TWO(O_CREAT));
59 AssertCompile(O_EXCL == RTFILE_O_CREATE); AssertCompile(RT_IS_POWER_OF_TWO(O_EXCL));
60 if (fFlags & O_CREAT)
61 {
62 if (fFlags & O_EXCL)
63 fFlags &= ~(uint64_t)O_CREAT;
64 va_list va;
65 va_start(va, fFlags);
66 int fMode = va_arg(va, int);
67 va_end(va);
68 fFlags &= ~(uint64_t)RTFILE_O_CREATE_MODE_MASK;
69 fFlags |= ((uint64_t)fMode << RTFILE_O_CREATE_MODE_SHIFT) & RTFILE_O_CREATE_MODE_MASK;
70 }
71 else
72 {
73 if (fFlags & O_EXCL)
74 fFlags &= ~(uint64_t)O_EXCL;
75 fFlags |= RTFILE_O_OPEN;
76 }
77
78 /* Close on exec / inherit flag needs inverting: */
79 AssertCompile(O_CLOEXEC == RTFILE_O_INHERIT);
80 fFlags ^= O_CLOEXEC;
81
82 /* Add deny selection: */
83 fFlags |= RTFILE_O_DENY_NONE;
84
85 /*
86 * Try open it.
87 */
88 RTFILE hFile = NIL_RTFILE;
89 int rc = RTFileOpen(&hFile, pszFilename, fFlags);
90 if (RT_SUCCESS(rc))
91 {
92 intptr_t fd = RTFileToNative(hFile);
93 if ((int)fd == fd)
94 return (int)fd;
95
96 AssertMsgFailed(("fd=%zd (%p)\n", fd, fd));
97 RTFileClose(hFile);
98 rc = VERR_INTERNAL_ERROR;
99 }
100 errno = RTErrConvertToErrno(rc);
101 return -1;
102}
103RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(open);
104
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