| 1 | /* $Id: GuestProcessImpl.h 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VirtualBox Main - Guest process handling implementation.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2012-2020 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 |
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| 18 | #ifndef MAIN_INCLUDED_GuestProcessImpl_h
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| 19 | #define MAIN_INCLUDED_GuestProcessImpl_h
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| 20 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 21 | # pragma once
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| 22 | #endif
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| 23 |
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| 24 | #include "GuestCtrlImplPrivate.h"
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| 25 | #include "GuestProcessWrap.h"
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| 26 |
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| 27 | #include <iprt/cpp/utils.h>
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| 28 |
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| 29 | class Console;
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| 30 | class GuestSession;
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| 31 | class GuestProcessStartTask;
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| 32 |
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| 33 | /**
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| 34 | * Class for handling a guest process.
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| 35 | */
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| 36 | class ATL_NO_VTABLE GuestProcess :
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| 37 | public GuestProcessWrap,
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| 38 | public GuestObject
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| 39 | {
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| 40 | public:
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| 41 | /** @name COM and internal init/term/mapping cruft.
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| 42 | * @{ */
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| 43 | DECLARE_EMPTY_CTOR_DTOR(GuestProcess)
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| 44 |
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| 45 | int init(Console *aConsole, GuestSession *aSession, ULONG aObjectID,
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| 46 | const GuestProcessStartupInfo &aProcInfo, const GuestEnvironment *pBaseEnv);
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| 47 | void uninit(void);
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| 48 | HRESULT FinalConstruct(void);
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| 49 | void FinalRelease(void);
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| 50 | /** @} */
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| 51 |
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| 52 | public:
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| 53 | /** @name Implemented virtual methods from GuestObject.
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| 54 | * @{ */
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| 55 | int i_callbackDispatcher(PVBOXGUESTCTRLHOSTCBCTX pCbCtx, PVBOXGUESTCTRLHOSTCALLBACK pSvcCb);
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| 56 | int i_onUnregister(void);
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| 57 | int i_onSessionStatusChange(GuestSessionStatus_T enmSessionStatus);
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| 58 | /** @} */
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| 59 |
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| 60 | public:
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| 61 | /** @name Public internal methods.
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| 62 | * @{ */
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| 63 | inline int i_checkPID(uint32_t uPID);
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| 64 | int i_readData(uint32_t uHandle, uint32_t uSize, uint32_t uTimeoutMS, void *pvData, size_t cbData, uint32_t *pcbRead, int *pGuestRc);
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| 65 | int i_startProcess(uint32_t cMsTimeout, int *pGuestRc);
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| 66 | int i_startProcessInner(uint32_t cMsTimeout, AutoWriteLock &rLock, GuestWaitEvent *pEvent, int *pGuestRc);
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| 67 | int i_startProcessAsync(void);
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| 68 | int i_terminateProcess(uint32_t uTimeoutMS, int *pGuestRc);
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| 69 | ProcessWaitResult_T i_waitFlagsToResult(uint32_t fWaitFlags);
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| 70 | int i_waitFor(uint32_t fWaitFlags, ULONG uTimeoutMS, ProcessWaitResult_T &waitResult, int *pGuestRc);
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| 71 | int i_waitForInputNotify(GuestWaitEvent *pEvent, uint32_t uHandle, uint32_t uTimeoutMS, ProcessInputStatus_T *pInputStatus, uint32_t *pcbProcessed);
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| 72 | int i_waitForOutput(GuestWaitEvent *pEvent, uint32_t uHandle, uint32_t uTimeoutMS, void* pvData, size_t cbData, uint32_t *pcbRead);
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| 73 | int i_waitForStatusChange(GuestWaitEvent *pEvent, uint32_t uTimeoutMS, ProcessStatus_T *pProcessStatus, int *pGuestRc);
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| 74 | int i_writeData(uint32_t uHandle, uint32_t uFlags, void *pvData, size_t cbData, uint32_t uTimeoutMS, uint32_t *puWritten, int *pGuestRc);
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| 75 | /** @} */
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| 76 |
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| 77 | /** @name Static internal methods.
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| 78 | * @{ */
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| 79 | static Utf8Str i_guestErrorToString(int guestRc);
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| 80 | static bool i_isGuestError(int guestRc);
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| 81 | static HRESULT i_setErrorExternal(VirtualBoxBase *pInterface, int guestRc);
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| 82 | static ProcessWaitResult_T i_waitFlagsToResultEx(uint32_t fWaitFlags, ProcessStatus_T oldStatus, ProcessStatus_T newStatus, uint32_t uProcFlags, uint32_t uProtocol);
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| 83 | #if 0 /* unused */
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| 84 | static bool i_waitResultImpliesEx(ProcessWaitResult_T waitResult, ProcessStatus_T procStatus, uint32_t uProtocol);
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| 85 | #endif
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| 86 | /** @} */
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| 87 |
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| 88 | protected:
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| 89 | /** @name Protected internal methods.
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| 90 | * @{ */
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| 91 | inline bool i_isAlive(void);
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| 92 | inline bool i_hasEnded(void);
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| 93 | int i_onGuestDisconnected(PVBOXGUESTCTRLHOSTCBCTX pCbCtx, PVBOXGUESTCTRLHOSTCALLBACK pSvcCbData);
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| 94 | int i_onProcessInputStatus(PVBOXGUESTCTRLHOSTCBCTX pCbCtx, PVBOXGUESTCTRLHOSTCALLBACK pSvcCbData);
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| 95 | int i_onProcessNotifyIO(PVBOXGUESTCTRLHOSTCBCTX pCbCtx, PVBOXGUESTCTRLHOSTCALLBACK pSvcCbData);
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| 96 | int i_onProcessStatusChange(PVBOXGUESTCTRLHOSTCBCTX pCbCtx, PVBOXGUESTCTRLHOSTCALLBACK pSvcCbData);
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| 97 | int i_onProcessOutput(PVBOXGUESTCTRLHOSTCBCTX pCbCtx, PVBOXGUESTCTRLHOSTCALLBACK pSvcCbData);
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| 98 | int i_prepareExecuteEnv(const char *pszEnv, void **ppvList, ULONG *pcbList, ULONG *pcEnvVars);
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| 99 | int i_setProcessStatus(ProcessStatus_T procStatus, int procRc);
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| 100 | static int i_startProcessThreadTask(GuestProcessStartTask *pTask);
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| 101 | /** @} */
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| 102 |
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| 103 | private:
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| 104 | /** Wrapped @name IProcess properties.
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| 105 | * @{ */
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| 106 | HRESULT getArguments(std::vector<com::Utf8Str> &aArguments);
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| 107 | HRESULT getEnvironment(std::vector<com::Utf8Str> &aEnvironment);
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| 108 | HRESULT getEventSource(ComPtr<IEventSource> &aEventSource);
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| 109 | HRESULT getExecutablePath(com::Utf8Str &aExecutablePath);
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| 110 | HRESULT getExitCode(LONG *aExitCode);
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| 111 | HRESULT getName(com::Utf8Str &aName);
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| 112 | HRESULT getPID(ULONG *aPID);
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| 113 | HRESULT getStatus(ProcessStatus_T *aStatus);
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| 114 | /** @} */
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| 115 |
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| 116 | /** Wrapped @name IProcess methods.
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| 117 | * @{ */
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| 118 | HRESULT waitFor(ULONG aWaitFor,
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| 119 | ULONG aTimeoutMS,
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| 120 | ProcessWaitResult_T *aReason);
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| 121 | HRESULT waitForArray(const std::vector<ProcessWaitForFlag_T> &aWaitFor,
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| 122 | ULONG aTimeoutMS,
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| 123 | ProcessWaitResult_T *aReason);
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| 124 | HRESULT read(ULONG aHandle,
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| 125 | ULONG aToRead,
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| 126 | ULONG aTimeoutMS,
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| 127 | std::vector<BYTE> &aData);
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| 128 | HRESULT write(ULONG aHandle,
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| 129 | ULONG aFlags,
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| 130 | const std::vector<BYTE> &aData,
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| 131 | ULONG aTimeoutMS,
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| 132 | ULONG *aWritten);
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| 133 | HRESULT writeArray(ULONG aHandle,
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| 134 | const std::vector<ProcessInputFlag_T> &aFlags,
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| 135 | const std::vector<BYTE> &aData,
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| 136 | ULONG aTimeoutMS,
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| 137 | ULONG *aWritten);
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| 138 | HRESULT terminate(void);
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| 139 | /** @} */
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| 140 |
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| 141 | /**
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| 142 | * This can safely be used without holding any locks.
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| 143 | * An AutoCaller suffices to prevent it being destroy while in use and
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| 144 | * internally there is a lock providing the necessary serialization.
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| 145 | */
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| 146 | const ComObjPtr<EventSource> mEventSource;
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| 147 |
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| 148 | struct Data
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| 149 | {
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| 150 | /** The process startup information. */
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| 151 | GuestProcessStartupInfo mProcess;
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| 152 | /** Reference to the immutable session base environment. NULL if the
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| 153 | * environment feature isn't supported.
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| 154 | * @remarks If there is proof that the uninit order of GuestSession and
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| 155 | * this class is what GuestObjectBase claims, then this isn't
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| 156 | * strictly necessary. */
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| 157 | GuestEnvironment const *mpSessionBaseEnv;
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| 158 | /** Exit code if process has been terminated. */
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| 159 | LONG mExitCode;
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| 160 | /** PID reported from the guest.
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| 161 | * Note: This is *not* the internal object ID! */
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| 162 | ULONG mPID;
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| 163 | /** The current process status. */
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| 164 | ProcessStatus_T mStatus;
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| 165 | /** The last returned process status
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| 166 | * returned from the guest side. */
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| 167 | int mLastError;
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| 168 |
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| 169 | Data(void) : mpSessionBaseEnv(NULL)
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| 170 | { }
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| 171 | ~Data(void)
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| 172 | {
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| 173 | if (mpSessionBaseEnv)
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| 174 | {
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| 175 | mpSessionBaseEnv->releaseConst();
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| 176 | mpSessionBaseEnv = NULL;
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| 177 | }
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| 178 | }
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| 179 | } mData;
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| 180 |
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| 181 | friend class GuestProcessStartTask;
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| 182 | };
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| 183 |
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| 184 | /**
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| 185 | * Guest process tool wait flags.
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| 186 | */
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| 187 | /** No wait flags specified; wait until process terminates.
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| 188 | * The maximum waiting time is set in the process' startup
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| 189 | * info. */
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| 190 | #define GUESTPROCESSTOOL_WAIT_FLAG_NONE 0
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| 191 | /** Wait until next stream block from stdout has been
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| 192 | * read in completely, then return.
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| 193 | */
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| 194 | #define GUESTPROCESSTOOL_WAIT_FLAG_STDOUT_BLOCK RT_BIT(0)
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| 195 |
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| 196 | /**
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| 197 | * Structure for keeping a VBoxService toolbox tool's error info around.
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| 198 | */
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| 199 | struct GuestProcessToolErrorInfo
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| 200 | {
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| 201 | /** Return code from the guest side for executing the process tool. */
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| 202 | int rcGuest;
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| 203 | /** The process tool's returned exit code. */
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| 204 | int32_t iExitCode;
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| 205 | };
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| 206 |
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| 207 | /**
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| 208 | * Internal class for handling the BusyBox-like tools built into VBoxService
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| 209 | * on the guest side. It's also called the VBoxService Toolbox (tm).
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| 210 | *
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| 211 | * Those initially were necessary to guarantee execution of commands (like "ls", "cat")
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| 212 | * under the behalf of a certain guest user.
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| 213 | *
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| 214 | * This class essentially helps to wrap all the gory details like process creation,
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| 215 | * information extraction and maintaining the overall status.
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| 216 | */
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| 217 | class GuestProcessTool
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| 218 | {
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| 219 | public:
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| 220 |
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| 221 | GuestProcessTool(void);
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| 222 |
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| 223 | virtual ~GuestProcessTool(void);
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| 224 |
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| 225 | public:
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| 226 |
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| 227 | int init(GuestSession *pGuestSession, const GuestProcessStartupInfo &startupInfo, bool fAsync, int *pGuestRc);
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| 228 |
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| 229 | void uninit(void);
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| 230 |
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| 231 | int getCurrentBlock(uint32_t uHandle, GuestProcessStreamBlock &strmBlock);
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| 232 |
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| 233 | int getRc(void) const;
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| 234 |
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| 235 | GuestProcessStream &getStdOut(void) { return mStdOut; }
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| 236 |
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| 237 | GuestProcessStream &getStdErr(void) { return mStdErr; }
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| 238 |
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| 239 | int wait(uint32_t fToolWaitFlags, int *pGuestRc);
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| 240 |
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| 241 | int waitEx(uint32_t fToolWaitFlags, GuestProcessStreamBlock *pStreamBlock, int *pGuestRc);
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| 242 |
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| 243 | bool isRunning(void);
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| 244 |
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| 245 | bool isTerminatedOk(void);
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| 246 |
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| 247 | int getTerminationStatus(int32_t *piExitCode = NULL);
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| 248 |
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| 249 | int terminate(uint32_t uTimeoutMS, int *pGuestRc);
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| 250 |
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| 251 | public:
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| 252 |
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| 253 | /** Wrapped @name Static run methods.
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| 254 | * @{ */
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| 255 | static int run(GuestSession *pGuestSession, const GuestProcessStartupInfo &startupInfo, int *pGuestRc);
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| 256 |
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| 257 | static int runErrorInfo(GuestSession *pGuestSession, const GuestProcessStartupInfo &startupInfo, GuestProcessToolErrorInfo &errorInfo);
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| 258 |
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| 259 | static int runEx(GuestSession *pGuestSession, const GuestProcessStartupInfo &startupInfo,
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| 260 | GuestCtrlStreamObjects *pStrmOutObjects, uint32_t cStrmOutObjects, int *pGuestRc);
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| 261 |
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| 262 | static int runExErrorInfo(GuestSession *pGuestSession, const GuestProcessStartupInfo &startupInfo,
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| 263 | GuestCtrlStreamObjects *pStrmOutObjects, uint32_t cStrmOutObjects, GuestProcessToolErrorInfo &errorInfo);
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| 264 | /** @} */
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| 265 |
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| 266 | /** Wrapped @name Static exit code conversion methods.
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| 267 | * @{ */
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| 268 | static int exitCodeToRc(const GuestProcessStartupInfo &startupInfo, int32_t iExitCode);
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| 269 |
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| 270 | static int exitCodeToRc(const char *pszTool, int32_t iExitCode);
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| 271 | /** @} */
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| 272 |
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| 273 | protected:
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| 274 |
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| 275 | /** Pointer to session this toolbox object is bound to. */
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| 276 | ComObjPtr<GuestSession> pSession;
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| 277 | /** Pointer to process object this toolbox object is bound to. */
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| 278 | ComObjPtr<GuestProcess> pProcess;
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| 279 | /** The toolbox' startup info. */
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| 280 | GuestProcessStartupInfo mStartupInfo;
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| 281 | /** Stream object for handling the toolbox' stdout data. */
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| 282 | GuestProcessStream mStdOut;
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| 283 | /** Stream object for handling the toolbox' stderr data. */
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| 284 | GuestProcessStream mStdErr;
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| 285 | };
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| 286 |
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| 287 | #endif /* !MAIN_INCLUDED_GuestProcessImpl_h */
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| 288 |
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