| 1 | /* $Id: LoadVBoxDDU.cpp 76452 2018-12-25 01:41:25Z 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) 2006-2017 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <iprt/initterm.h>
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| 32 | #include <iprt/ldr.h>
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| 33 | #include <iprt/errcore.h>
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| 34 | #include <iprt/path.h>
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| 35 | #include <iprt/string.h>
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| 36 |
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| 37 |
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| 38 | /**
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| 39 | * Class used for registering a VFS chain element provider.
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| 40 | */
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| 41 | class LoadVBoxDDU
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| 42 | {
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| 43 | private:
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| 44 | /** The VBoxDDU handle. */
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| 45 | RTLDRMOD g_hLdrMod;
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| 46 |
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| 47 | public:
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| 48 | LoadVBoxDDU(void) : g_hLdrMod(NIL_RTLDRMOD)
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| 49 | {
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| 50 | int rc = RTR3InitDll(RTR3INIT_FLAGS_UNOBTRUSIVE);
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| 51 | if (RT_SUCCESS(rc))
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| 52 | {
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| 53 | char szPath[RTPATH_MAX];
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| 54 |
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| 55 | /* Try private arch dir first. */
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| 56 | rc = RTPathAppPrivateArch(szPath, sizeof(szPath));
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| 57 | if (RT_SUCCESS(rc))
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| 58 | rc = RTPathAppend(szPath, sizeof(szPath), "VBoxDDU");
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| 59 | if (RT_SUCCESS(rc))
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| 60 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 61 | if (RT_SUCCESS(rc))
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| 62 | {
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| 63 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 64 | if (RT_SUCCESS(rc))
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| 65 | return;
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| 66 | }
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| 67 |
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| 68 | /* Try shared libs dir next. */
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| 69 | rc = RTPathSharedLibs(szPath, sizeof(szPath));
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| 70 | if (RT_SUCCESS(rc))
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| 71 | rc = RTPathAppend(szPath, sizeof(szPath), "VBoxDDU");
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| 72 | if (RT_SUCCESS(rc))
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| 73 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 74 | if (RT_SUCCESS(rc))
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| 75 | {
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| 76 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 77 | if (RT_SUCCESS(rc))
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| 78 | return;
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| 79 | }
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| 80 |
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| 81 | /* Try exec dir after that. */
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| 82 | rc = RTPathExecDir(szPath, sizeof(szPath));
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| 83 | if (RT_SUCCESS(rc))
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| 84 | rc = RTPathAppend(szPath, sizeof(szPath), "VBoxDDU");
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| 85 | if (RT_SUCCESS(rc))
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| 86 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 87 | if (RT_SUCCESS(rc))
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| 88 | {
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| 89 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 90 | if (RT_SUCCESS(rc))
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| 91 | return;
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| 92 | }
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| 93 |
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| 94 | /* Try exec dir parent after that. */
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| 95 | rc = RTPathExecDir(szPath, sizeof(szPath));
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| 96 | if (RT_SUCCESS(rc))
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| 97 | rc = RTPathAppend(szPath, sizeof(szPath), ".." RTPATH_SLASH_STR "VBoxDDU");
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| 98 | if (RT_SUCCESS(rc))
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| 99 | rc = RTStrCat(szPath, sizeof(szPath), RTLdrGetSuff());
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| 100 | if (RT_SUCCESS(rc))
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| 101 | {
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| 102 | rc = RTLdrLoad(szPath, &g_hLdrMod);
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| 103 | if (RT_SUCCESS(rc))
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| 104 | return;
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| 105 | }
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| 106 |
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| 107 | /* Didn't work out, don't sweat it. */
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| 108 | g_hLdrMod = NIL_RTLDRMOD;
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| 109 | }
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| 110 | }
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| 111 |
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| 112 | ~LoadVBoxDDU()
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| 113 | {
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| 114 | if (g_hLdrMod != NIL_RTLDRMOD)
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| 115 | {
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| 116 | RTLdrClose(g_hLdrMod);
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| 117 | g_hLdrMod = NIL_RTLDRMOD;
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| 118 | }
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| 119 | }
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| 120 |
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| 121 | static LoadVBoxDDU s_LoadVBoxDDU;
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| 122 | };
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| 123 |
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| 124 | /* static*/ LoadVBoxDDU LoadVBoxDDU::s_LoadVBoxDDU;
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| 125 |
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