| 1 | /* $Id: LoadVBoxDDU.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VirtualBox Runtime - Try Load VBoxDDU to get VFS chain providers from storage.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 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 | #include <iprt/initterm.h>
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| 42 | #include <iprt/ldr.h>
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| 43 | #include <iprt/errcore.h>
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| 44 | #include <iprt/path.h>
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| 45 | #include <iprt/string.h>
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| 46 |
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| 47 |
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| 48 | /**
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| 49 | * Class used for registering a VFS chain element provider.
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| 50 | */
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| 51 | class LoadVBoxDDU
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| 52 | {
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| 53 | private:
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| 54 | /** The VBoxDDU handle. */
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| 55 | RTLDRMOD g_hLdrMod;
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| 56 |
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| 57 | public:
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| 58 | LoadVBoxDDU(void) : g_hLdrMod(NIL_RTLDRMOD)
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| 59 | {
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| 60 | int rc = RTR3InitDll(RTR3INIT_FLAGS_UNOBTRUSIVE);
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| 61 | if (RT_SUCCESS(rc))
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| 62 | {
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| 63 | char szPath[RTPATH_MAX];
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| 64 |
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| 65 | /* Try private arch dir first. */
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| 66 | rc = RTPathAppPrivateArch(szPath, sizeof(szPath));
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| 67 | if (RT_SUCCESS(rc))
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| 68 | rc = RTPathAppend(szPath, sizeof(szPath), "VBoxDDU");
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| 69 | if (RT_SUCCESS(rc))
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| 70 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 71 | if (RT_SUCCESS(rc))
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| 72 | {
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| 73 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 74 | if (RT_SUCCESS(rc))
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| 75 | return;
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| 76 | }
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| 77 |
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| 78 | /* Try shared libs dir next. */
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| 79 | rc = RTPathSharedLibs(szPath, sizeof(szPath));
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| 80 | if (RT_SUCCESS(rc))
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| 81 | rc = RTPathAppend(szPath, sizeof(szPath), "VBoxDDU");
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| 82 | if (RT_SUCCESS(rc))
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| 83 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 84 | if (RT_SUCCESS(rc))
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| 85 | {
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| 86 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 87 | if (RT_SUCCESS(rc))
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| 88 | return;
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| 89 | }
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| 90 |
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| 91 | /* Try exec dir after that. */
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| 92 | rc = RTPathExecDir(szPath, sizeof(szPath));
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| 93 | if (RT_SUCCESS(rc))
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| 94 | rc = RTPathAppend(szPath, sizeof(szPath), "VBoxDDU");
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| 95 | if (RT_SUCCESS(rc))
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| 96 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 97 | if (RT_SUCCESS(rc))
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| 98 | {
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| 99 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 100 | if (RT_SUCCESS(rc))
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| 101 | return;
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| 102 | }
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| 103 |
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| 104 | /* Try exec dir parent after that. */
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| 105 | rc = RTPathExecDir(szPath, sizeof(szPath));
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| 106 | if (RT_SUCCESS(rc))
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| 107 | rc = RTPathAppend(szPath, sizeof(szPath), ".." RTPATH_SLASH_STR "VBoxDDU");
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| 108 | if (RT_SUCCESS(rc))
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| 109 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 110 | if (RT_SUCCESS(rc))
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| 111 | {
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| 112 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 113 | if (RT_SUCCESS(rc))
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| 114 | return;
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| 115 | }
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| 116 |
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| 117 | /* Didn't work out, don't sweat it. */
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| 118 | g_hLdrMod = NIL_RTLDRMOD;
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| 119 | }
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| 120 | }
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| 121 |
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| 122 | ~LoadVBoxDDU()
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| 123 | {
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| 124 | if (g_hLdrMod != NIL_RTLDRMOD)
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| 125 | {
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| 126 | RTLdrClose(g_hLdrMod);
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| 127 | g_hLdrMod = NIL_RTLDRMOD;
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| 128 | }
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| 129 | }
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| 130 |
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| 131 | static LoadVBoxDDU s_LoadVBoxDDU;
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| 132 | };
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| 133 |
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| 134 | /* static*/ LoadVBoxDDU LoadVBoxDDU::s_LoadVBoxDDU;
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| 135 |
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