| 1 | /* $Id: nocrt-open.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - No-CRT - read().
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2022 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
|
|---|
| 52 | int 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 | }
|
|---|
| 103 | RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(open);
|
|---|
| 104 |
|
|---|
