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