VBoxServiceControlExec.cpp revision 0426463996ec1b6d5af11e5e2845257f94496fbd
/* $Id$ */
/** @file
* VBoxServiceControlExec - Utility functions for process execution.
*/
/*
* Copyright (C) 2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <iprt/assert.h>
#include <iprt/crc32.h>
#include <iprt/ctype.h>
#include <iprt/env.h>
#include <iprt/file.h>
#include <iprt/getopt.h>
#include <iprt/handle.h>
#include <iprt/mem.h>
#include <iprt/path.h>
#include <iprt/param.h>
#include <iprt/pipe.h>
#include <iprt/poll.h>
#include <iprt/process.h>
#include <iprt/string.h>
#include <iprt/semaphore.h>
#include <iprt/stream.h>
#include <iprt/thread.h>
#include <VBox/version.h>
#include <VBox/VBoxGuestLib.h>
#include <VBox/HostServices/GuestControlSvc.h>
#include "VBoxServiceInternal.h"
#include "VBoxServiceUtils.h"
using namespace guestControl;
extern RTLISTNODE g_GuestControlExecThreads;
/**
* Handle an error event on standard input.
*
* @param hPollSet The polling set.
* @param fPollEvt The event mask returned by RTPollNoResume.
* @param phStdInW The standard input pipe handle.
* @param pStdInBuf The standard input buffer.
*/
static void VBoxServiceControlExecProcHandleStdInErrorEvent(RTPOLLSET hPollSet, uint32_t fPollEvt, PRTPIPE phStdInW,
PVBOXSERVICECTRLSTDINBUF pStdInBuf)
{
int rc2;
if (pStdInBuf->off < pStdInBuf->cb)
{
rc2 = RTPollSetRemove(hPollSet, 4 /*TXSEXECHNDID_STDIN_WRITABLE*/);
AssertRC(rc2);
}
rc2 = RTPollSetRemove(hPollSet, 0 /*TXSEXECHNDID_STDIN*/);
AssertRC(rc2);
rc2 = RTPipeClose(*phStdInW);
AssertRC(rc2);
*phStdInW = NIL_RTPIPE;
RTMemFree(pStdInBuf->pch);
pStdInBuf->pch = NULL;
pStdInBuf->off = 0;
pStdInBuf->cb = 0;
pStdInBuf->cbAllocated = 0;
pStdInBuf->fBitBucket = true;
}
/**
* Try write some more data to the standard input of the child.
*
* @returns IPRT status code.
* @param pStdInBuf The standard input buffer.
* @param hStdInW The standard input pipe.
*/
static int VBoxServiceControlExecProcWriteStdIn(PVBOXSERVICECTRLSTDINBUF pStdInBuf, RTPIPE hStdInW)
{
size_t cbToWrite = pStdInBuf->cb - pStdInBuf->off;
size_t cbWritten;
int rc = RTPipeWrite(hStdInW, &pStdInBuf->pch[pStdInBuf->off], cbToWrite, &cbWritten);
if (RT_SUCCESS(rc))
{
Assert(cbWritten == cbToWrite);
pStdInBuf->off += cbWritten;
}
return rc;
}
/**
* Handle an event indicating we can write to the standard input pipe of the
* child process.
*
* @param hPollSet The polling set.
* @param fPollEvt The event mask returned by RTPollNoResume.
* @param phStdInW The standard input pipe.
* @param pStdInBuf The standard input buffer.
*/
static void VBoxServiceControlExecProcHandleStdInWritableEvent(RTPOLLSET hPollSet, uint32_t fPollEvt, PRTPIPE phStdInW,
PVBOXSERVICECTRLSTDINBUF pStdInBuf)
{
int rc;
if (!(fPollEvt & RTPOLL_EVT_ERROR))
{
rc = VBoxServiceControlExecProcWriteStdIn(pStdInBuf, *phStdInW);
if (RT_FAILURE(rc) && rc != VERR_BAD_PIPE)
{
/** @todo do we need to do something about this error condition? */
AssertRC(rc);
}
if (pStdInBuf->off < pStdInBuf->cb)
{
rc = RTPollSetRemove(hPollSet, 4 /*TXSEXECHNDID_STDIN_WRITABLE*/);
AssertRC(rc);
}
}
else
VBoxServiceControlExecProcHandleStdInErrorEvent(hPollSet, fPollEvt, phStdInW, pStdInBuf);
}
/**
* Handle pending output data or error on standard out, standard error or the
* test pipe.
*
* @returns IPRT status code from client send.
* @param pThread The thread specific data.
* @param hPollSet The polling set.
* @param fPollEvt The event mask returned by RTPollNoResume.
* @param phPipeR The pipe handle.
* @param pu32Crc The current CRC-32 of the stream. (In/Out)
* @param uHandleId The handle ID.
* @param pszOpcode The opcode for the data upload.
*
* @todo Put the last 4 parameters into a struct!
*/
static int VBoxServiceControlExecProcHandleOutputEvent(PVBOXSERVICECTRLTHREAD pThread,
RTPOLLSET hPollSet, uint32_t fPollEvt, PRTPIPE phPipeR,
uint32_t *puCrc32 , uint32_t uHandleId)
{
Log(("VBoxServiceControlExecProcHandleOutputEvent: fPollEvt=%#x\n", fPollEvt));
/*
* Try drain the pipe before acting on any errors.
*/
int rc = VINF_SUCCESS;
size_t cbRead;
uint8_t abBuf[_64K];
AssertPtr(pThread);
PVBOXSERVICECTRLTHREADDATAEXEC pData = (PVBOXSERVICECTRLTHREADDATAEXEC)pThread->pvData;
AssertPtr(pData);
int rc2 = RTPipeRead(*phPipeR, abBuf, sizeof(abBuf), &cbRead);
if (RT_SUCCESS(rc2) && cbRead)
{
#if 0
/* Only used for "real-time" stdout/stderr data; gets sent immediately (later)! */
rc = VbglR3GuestCtrlExecSendOut(pThread->uClientID, pThread->uContextID,
pData->uPID, uHandleId, 0 /* u32Flags */,
abBuf, cbRead);
if (RT_FAILURE(rc))
{
VBoxServiceError("ControlExec: Error while sending real-time output data, rc=%Rrc, cbRead=%u, CID=%u, PID=%u\n",
rc, cbRead, pThread->uClientID, pData->uPID);
}
else
{
#endif
rc = VBoxServiceControlExecWritePipeBuffer(&pData->stdOut, abBuf, cbRead);
if (RT_SUCCESS(rc))
{
/* Make sure we go another poll round in case there was too much data
for the buffer to hold. */
fPollEvt &= RTPOLL_EVT_ERROR;
}
#if 0
}
#endif
}
else if (RT_FAILURE(rc2))
{
fPollEvt |= RTPOLL_EVT_ERROR;
AssertMsg(rc2 == VERR_BROKEN_PIPE, ("%Rrc\n", rc));
}
/*
* If an error was raised signalled,
*/
if (fPollEvt & RTPOLL_EVT_ERROR)
{
rc2 = RTPollSetRemove(hPollSet, uHandleId);
AssertRC(rc2);
rc2 = RTPipeClose(*phPipeR);
AssertRC(rc2);
*phPipeR = NIL_RTPIPE;
}
return rc;
}
/**
* Handle a transport event or successful pfnPollIn() call.
*
* @returns IPRT status code from client send.
* @retval VINF_EOF indicates ABORT command.
*
* @param hPollSet The polling set.
* @param fPollEvt The event mask returned by RTPollNoResume.
* @param idPollHnd The handle ID.
* @param hStdInW The standard input pipe.
* @param pStdInBuf The standard input buffer.
*/
static int VBoxServiceControlExecProcHandleTransportEvent(RTPOLLSET hPollSet, uint32_t fPollEvt, uint32_t idPollHnd,
PRTPIPE phStdInW, PVBOXSERVICECTRLSTDINBUF pStdInBuf)
{
int rc = RTPollSetAddPipe(hPollSet, *phStdInW, RTPOLL_EVT_WRITE, 4 /*TXSEXECHNDID_STDIN_WRITABLE*/);
return rc;
}
static int VBoxServiceControlExecProcLoop(PVBOXSERVICECTRLTHREAD pThread,
RTPROCESS hProcess, RTMSINTERVAL cMillies, RTPOLLSET hPollSet,
RTPIPE hStdInW, RTPIPE hStdOutR, RTPIPE hStdErrR)
{
int rc;
int rc2;
VBOXSERVICECTRLSTDINBUF StdInBuf = { 0, 0, NULL, 0, hStdInW == NIL_RTPIPE, RTCrc32Start() };
uint32_t uStdOutCrc32 = RTCrc32Start();
uint32_t uStdErrCrc32 = uStdOutCrc32;
uint64_t const MsStart = RTTimeMilliTS();
RTPROCSTATUS ProcessStatus = { 254, RTPROCEXITREASON_ABEND };
bool fProcessAlive = true;
bool fProcessTimedOut = false;
uint64_t MsProcessKilled = UINT64_MAX;
bool const fHavePipes = hStdInW != NIL_RTPIPE
|| hStdOutR != NIL_RTPIPE
|| hStdErrR != NIL_RTPIPE;
RTMSINTERVAL const cMsPollBase = hStdInW != NIL_RTPIPE
? 100 /* need to poll for input */
: 1000; /* need only poll for process exit and aborts */
RTMSINTERVAL cMsPollCur = 0;
AssertPtr(pThread);
AssertPtr(pThread);
PVBOXSERVICECTRLTHREADDATAEXEC pData = (PVBOXSERVICECTRLTHREADDATAEXEC)pThread->pvData;
AssertPtr(pData);
/* Assign PID to thread data. */
pData->uPID = hProcess;
/*
* Before entering the loop, tell the host that we've started the guest
* and that it's now OK to send input to the process.
*/
VBoxServiceVerbose(3, "ControlExec: Process started: PID=%u, CID=%u, User=%s, PW=%s\n",
pData->uPID, pThread->uContextID, pData->pszUser, pData->pszPassword);
rc = VbglR3GuestCtrlExecReportStatus(pThread->uClientID, pThread->uContextID,
pData->uPID, PROC_STS_STARTED, 0 /* u32Flags */,
NULL /* pvData */, 0 /* cbData */);
/*
* Process input, output, the test pipe and client requests.
*/
while ( RT_SUCCESS(rc)
&& RT_UNLIKELY(!pThread->fShutdown))
{
/*
* Wait/Process all pending events.
*/
uint32_t idPollHnd;
uint32_t fPollEvt;
rc2 = RTPollNoResume(hPollSet, cMsPollCur, &fPollEvt, &idPollHnd);
if (pThread->fShutdown)
continue;
cMsPollCur = 0; /* no rest until we've checked everything. */
if (RT_SUCCESS(rc2))
{
switch (idPollHnd)
{
case 0 /* TXSEXECHNDID_STDIN */:
VBoxServiceControlExecProcHandleStdInErrorEvent(hPollSet, fPollEvt, &hStdInW, &StdInBuf);
break;
case 1 /* TXSEXECHNDID_STDOUT */:
rc = VBoxServiceControlExecProcHandleOutputEvent(pThread, hPollSet, fPollEvt, &hStdOutR, &uStdOutCrc32, 1 /* TXSEXECHNDID_STDOUT */);
break;
case 2 /*TXSEXECHNDID_STDERR */:
rc = VBoxServiceControlExecProcHandleOutputEvent(pThread, hPollSet, fPollEvt, &hStdErrR, &uStdErrCrc32, 2 /*TXSEXECHNDID_STDERR */);
break;
case 4 /* TXSEXECHNDID_STDIN_WRITABLE */:
VBoxServiceControlExecProcHandleStdInWritableEvent(hPollSet, fPollEvt, &hStdInW, &StdInBuf);
break;
default:
rc = VBoxServiceControlExecProcHandleTransportEvent(hPollSet, fPollEvt, idPollHnd, &hStdInW, &StdInBuf);
break;
}
if (RT_FAILURE(rc) || rc == VINF_EOF)
break; /* abort command, or client dead or something */
continue;
}
/*
* Check for incoming data.
*/
/*
* Check for process death.
*/
if (fProcessAlive)
{
rc2 = RTProcWaitNoResume(hProcess, RTPROCWAIT_FLAGS_NOBLOCK, &ProcessStatus);
if (RT_SUCCESS_NP(rc2))
{
fProcessAlive = false;
continue;
}
if (RT_UNLIKELY(rc2 == VERR_INTERRUPTED))
continue;
if (RT_UNLIKELY(rc2 == VERR_PROCESS_NOT_FOUND))
{
fProcessAlive = false;
ProcessStatus.enmReason = RTPROCEXITREASON_ABEND;
ProcessStatus.iStatus = 255;
AssertFailed();
}
else
AssertMsg(rc2 == VERR_PROCESS_RUNNING, ("%Rrc\n", rc2));
}
/*
* If the process has terminated, we're should head out.
*/
if (!fProcessAlive)
break;
/*
* Check for timed out, killing the process.
*/
uint32_t cMilliesLeft = RT_INDEFINITE_WAIT;
if (cMillies != RT_INDEFINITE_WAIT)
{
uint64_t u64Now = RTTimeMilliTS();
uint64_t cMsElapsed = u64Now - MsStart;
if (cMsElapsed >= cMillies)
{
VBoxServiceVerbose(3, "ControlExec: Process timed out (%ums elapsed > %ums timeout), killing ...", cMsElapsed, cMillies);
fProcessTimedOut = true;
if ( MsProcessKilled == UINT64_MAX
|| u64Now - MsProcessKilled > 1000)
{
if (u64Now - MsProcessKilled > 20*60*1000)
break; /* give up after 20 mins */
RTProcTerminate(hProcess);
MsProcessKilled = u64Now;
continue;
}
cMilliesLeft = 10000;
}
else
cMilliesLeft = cMillies - (uint32_t)cMsElapsed;
}
/* Reset the polling interval since we've done all pending work. */
cMsPollCur = cMilliesLeft >= cMsPollBase ? cMsPollBase : cMilliesLeft;
/*
* Need to exit?
*/
if (pThread->fShutdown)
break;
}
/*
* Try kill the process if it's still alive at this point.
*/
if (fProcessAlive)
{
if (MsProcessKilled == UINT64_MAX)
{
MsProcessKilled = RTTimeMilliTS();
RTProcTerminate(hProcess);
RTThreadSleep(500);
}
for (size_t i = 0; i < 10; i++)
{
rc2 = RTProcWait(hProcess, RTPROCWAIT_FLAGS_NOBLOCK, &ProcessStatus);
if (RT_SUCCESS(rc2))
{
fProcessAlive = false;
break;
}
if (i >= 5)
RTProcTerminate(hProcess);
RTThreadSleep(i >= 5 ? 2000 : 500);
}
}
/*
* If we don't have a client problem (RT_FAILURE(rc) we'll reply to the
* clients exec packet now.
*/
if (RT_SUCCESS(rc))
{
uint32_t uStatus = PROC_STS_UNDEFINED;
uint32_t uFlags = 0;
if ( fProcessTimedOut && !fProcessAlive && MsProcessKilled != UINT64_MAX)
{
VBoxServiceVerbose(3, "ControlExec: Process timed out and got killed\n");
uStatus = PROC_STS_TOK;
}
else if (fProcessTimedOut && fProcessAlive && MsProcessKilled != UINT64_MAX)
{
VBoxServiceVerbose(3, "ControlExec: Process timed out and did *not* get killed\n");
uStatus = PROC_STS_TOA;
}
else if (pThread->fShutdown && (fProcessAlive || MsProcessKilled != UINT64_MAX))
{
VBoxServiceVerbose(3, "ControlExec: Process got terminated because system/service is about to shutdown\n");
uStatus = PROC_STS_DWN; /* Service is stopping, process was killed. */
}
else if (fProcessAlive)
{
VBoxServiceError("ControlExec: Process is alive when it should not!\n");
}
else if (MsProcessKilled != UINT64_MAX)
{
VBoxServiceError("ControlExec: Process has been killed when it should not!\n");
}
else if (ProcessStatus.enmReason == RTPROCEXITREASON_NORMAL)
{
VBoxServiceVerbose(3, "ControlExec: Process ended with RTPROCEXITREASON_NORMAL\n");
uStatus = PROC_STS_TEN;
uFlags = ProcessStatus.iStatus;
}
else if (ProcessStatus.enmReason == RTPROCEXITREASON_SIGNAL)
{
VBoxServiceVerbose(3, "ControlExec: Process ended with RTPROCEXITREASON_SIGNAL\n");
uStatus = PROC_STS_TES;
uFlags = ProcessStatus.iStatus;
}
else if (ProcessStatus.enmReason == RTPROCEXITREASON_ABEND)
{
VBoxServiceVerbose(3, "ControlExec: Process ended with RTPROCEXITREASON_ABEND\n");
uStatus = PROC_STS_TEA;
uFlags = ProcessStatus.iStatus;
}
else
{
VBoxServiceError("ControlExec: Process has reached an undefined status!\n");
}
VBoxServiceVerbose(3, "ControlExec: Process ended: PID=%u, CID=%u, Status=%u, Flags=%u\n",
pData->uPID, pThread->uContextID, uStatus, uFlags);
rc = VbglR3GuestCtrlExecReportStatus(pThread->uClientID, pThread->uContextID,
pData->uPID, uStatus, uFlags,
NULL /* pvData */, 0 /* cbData */);
}
RTMemFree(StdInBuf.pch);
VBoxServiceVerbose(3, "ControlExec: Process loop ended with rc=%Rrc\n", rc);
return rc;
}
/**
* Sets up the redirection / pipe / nothing for one of the standard handles.
*
* @returns IPRT status code. No client replies made.
* @param pszHowTo How to set up this standard handle.
* @param fd Which standard handle it is (0 == stdin, 1 ==
* stdout, 2 == stderr).
* @param ph The generic handle that @a pph may be set
* pointing to. Always set.
* @param pph Pointer to the RTProcCreateExec argument.
* Always set.
* @param phPipe Where to return the end of the pipe that we
* should service. Always set.
*/
static int VBoxServiceControlExecSetupPipe(int fd, PRTHANDLE ph, PRTHANDLE *pph, PRTPIPE phPipe)
{
AssertPtr(ph);
AssertPtr(pph);
AssertPtr(phPipe);
ph->enmType = RTHANDLETYPE_PIPE;
ph->u.hPipe = NIL_RTPIPE;
*pph = NULL;
*phPipe = NIL_RTPIPE;
int rc;
/*
* Setup a pipe for forwarding to/from the client.
* The ph union struct will be filled with a pipe read/write handle
* to represent the "other" end to phPipe.
*/
if (fd == 0) /* stdin? */
{
/* Connect a wrtie pipe specified by phPipe to stdin. */
rc = RTPipeCreate(&ph->u.hPipe, phPipe, RTPIPE_C_INHERIT_READ);
}
else /* stdout or stderr? */
{
/* Connect a read pipe specified by phPipe to stdout or stderr. */
rc = RTPipeCreate(phPipe, &ph->u.hPipe, RTPIPE_C_INHERIT_WRITE);
}
if (RT_FAILURE(rc))
return rc;
ph->enmType = RTHANDLETYPE_PIPE;
*pph = ph;
return rc;
}
int VBoxServiceControlExecInitPipeBuffer(PVBOXSERVICECTRLEXECPIPEBUF pBuf)
{
AssertPtr(pBuf);
pBuf->pbData = (uint8_t*)RTMemAlloc(_64K); /* Start with a 64k buffer. */
AssertReturn(pBuf->pbData, VERR_NO_MEMORY);
pBuf->cbSize = 0;
pBuf->cbOffset = 0;
pBuf->cbRead = 0;
return RTCritSectInit(&pBuf->CritSect);
}
int VBoxServiceControlExecDestroyPipeBuffer(PVBOXSERVICECTRLEXECPIPEBUF pBuf)
{
if (pBuf)
{
if (pBuf->pbData)
RTMemFree(pBuf->pbData);
pBuf->pbData = NULL;
pBuf->cbSize = 0;
pBuf->cbOffset = 0;
pBuf->cbRead = 0;
}
return RTCritSectDelete(&pBuf->CritSect);
}
int VBoxServiceControlExecReadPipeBufferContent(PVBOXSERVICECTRLEXECPIPEBUF pBuf,
uint8_t *pbBuffer, uint32_t cbBuffer, uint32_t *pcbToRead)
{
AssertPtr(pBuf);
AssertPtr(pcbToRead);
int rc = RTCritSectEnter(&pBuf->CritSect);
if (RT_SUCCESS(rc))
{
Assert(pBuf->cbOffset >= pBuf->cbRead);
if (*pcbToRead > pBuf->cbOffset - pBuf->cbRead)
*pcbToRead = pBuf->cbOffset - pBuf->cbRead;
if (*pcbToRead > cbBuffer)
*pcbToRead = cbBuffer;
if (*pcbToRead > 0)
{
memcpy(pbBuffer, pBuf->pbData + pBuf->cbRead, *pcbToRead);
pBuf->cbRead += *pcbToRead;
}
else
{
pbBuffer = NULL;
*pcbToRead = 0;
}
rc = RTCritSectLeave(&pBuf->CritSect);
}
return rc;
}
int VBoxServiceControlExecWritePipeBuffer(PVBOXSERVICECTRLEXECPIPEBUF pBuf,
uint8_t *pbData, uint32_t cbData)
{
AssertPtr(pBuf);
int rc = RTCritSectEnter(&pBuf->CritSect);
if (RT_SUCCESS(rc))
{
/** @todo Use RTMemCache or RTMemObj here? */
uint8_t *pNewBuf;
while (pBuf->cbSize - pBuf->cbOffset < cbData)
{
pNewBuf = (uint8_t*)RTMemRealloc(pBuf->pbData, pBuf->cbSize + _4K);
if (pNewBuf == NULL)
break;
pBuf->cbSize += _4K;
pBuf->pbData = pNewBuf;
}
rc = VINF_SUCCESS;
if (pBuf->pbData)
{
memcpy(pBuf->pbData + pBuf->cbOffset, pbData, cbData);
pBuf->cbOffset += cbData;
/** @todo Add offset clamping! */
}
else
rc = VERR_NO_MEMORY;
int rc2 = RTCritSectLeave(&pBuf->CritSect);
if (RT_SUCCESS(rc))
rc = rc2;
}
return rc;
}
/** Allocates and gives back a thread data struct which then can be used by the worker thread. */
int VBoxServiceControlExecAllocateThreadData(PVBOXSERVICECTRLTHREAD pThread,
uint32_t u32ContextID,
const char *pszCmd, uint32_t uFlags,
const char *pszArgs, uint32_t uNumArgs,
const char *pszEnv, uint32_t cbEnv, uint32_t uNumEnvVars,
const char *pszUser, const char *pszPassword, uint32_t uTimeLimitMS)
{
AssertPtr(pThread);
/* General stuff. */
pThread->Node.pPrev = NULL;
pThread->Node.pNext = NULL;
pThread->fShutdown = false;
pThread->fStarted = false;
pThread->fStopped = false;
pThread->uContextID = u32ContextID;
/* ClientID will be assigned when thread is started! */
/* Specific stuff. */
PVBOXSERVICECTRLTHREADDATAEXEC pData = (PVBOXSERVICECTRLTHREADDATAEXEC)RTMemAlloc(sizeof(VBOXSERVICECTRLTHREADDATAEXEC));
if (pData == NULL)
return VERR_NO_MEMORY;
pData->uPID = 0; /* Don't have a PID yet. */
pData->pszCmd = RTStrDup(pszCmd);
pData->uFlags = uFlags;
pData->uNumEnvVars = 0;
pData->uNumArgs = 0; /* Initialize in case of RTGetOptArgvFromString() is failing ... */
/* Prepare argument list. */
int rc = RTGetOptArgvFromString(&pData->papszArgs, (int*)&pData->uNumArgs,
(uNumArgs > 0) ? pszArgs : "", NULL);
/* Did we get the same result? */
Assert(uNumArgs == pData->uNumArgs);
if (RT_SUCCESS(rc))
{
/* Prepare environment list. */
if (uNumEnvVars)
{
pData->papszEnv = (char**)RTMemAlloc(uNumEnvVars * sizeof(char*));
AssertPtr(pData->papszEnv);
pData->uNumEnvVars = uNumEnvVars;
const char *pcCur = pszEnv;
uint32_t i = 0;
uint32_t cbLen = 0;
while (cbLen < cbEnv)
{
if (RTStrAPrintf(&pData->papszEnv[i++], "%s", pcCur) < 0)
{
rc = VERR_NO_MEMORY;
break;
}
cbLen += strlen(pcCur) + 1; /* Skip terminating zero. */
pcCur += cbLen;
}
}
pData->pszUser = RTStrDup(pszUser);
pData->pszPassword = RTStrDup(pszPassword);
pData->uTimeLimitMS = uTimeLimitMS;
/* Adjust time limit value. */
pData->uTimeLimitMS = ( (uTimeLimitMS == UINT32_MAX)
|| (uTimeLimitMS == 0)) ?
RT_INDEFINITE_WAIT : uTimeLimitMS;
/* Init buffers. */
rc = VBoxServiceControlExecInitPipeBuffer(&pData->stdOut);
if (RT_SUCCESS(rc))
rc = VBoxServiceControlExecInitPipeBuffer(&pData->stdErr);
}
if (RT_FAILURE(rc))
{
VBoxServiceControlExecDestroyThreadData(pData);
}
else
{
pThread->enmType = VBoxServiceCtrlThreadDataExec;
pThread->pvData = pData;
}
return rc;
}
/** Frees an allocated thread data structure along with all its allocated parameters. */
void VBoxServiceControlExecDestroyThreadData(PVBOXSERVICECTRLTHREADDATAEXEC pData)
{
if (pData)
{
RTStrFree(pData->pszCmd);
if (pData->uNumEnvVars)
{
for (uint32_t i = 0; i < pData->uNumEnvVars; i++)
RTStrFree(pData->papszEnv[i]);
RTMemFree(pData->papszEnv);
}
RTGetOptArgvFree(pData->papszArgs);
RTStrFree(pData->pszUser);
RTStrFree(pData->pszPassword);
VBoxServiceControlExecDestroyPipeBuffer(&pData->stdOut);
VBoxServiceControlExecDestroyPipeBuffer(&pData->stdErr);
RTMemFree(pData);
pData = NULL;
}
}
DECLCALLBACK(int) VBoxServiceControlExecProcessWorker(PVBOXSERVICECTRLTHREAD pThread)
{
AssertPtr(pThread);
PVBOXSERVICECTRLTHREADDATAEXEC pData = (PVBOXSERVICECTRLTHREADDATAEXEC)pThread->pvData;
AssertPtr(pData);
/*
* Tell the control thread that it can continue
* spawning services.
*/
RTThreadUserSignal(RTThreadSelf());
VBoxServiceVerbose(3, "ControlExec: Thread of process \"%s\" started\n", pData->pszCmd);
int rc = VbglR3GuestCtrlConnect(&pThread->uClientID);
if (RT_FAILURE(rc))
{
VBoxServiceError("ControlExec: Thread failed to connect to the guest control service, aborted! Error: %Rrc\n", rc);
return rc;
}
/*
* Create the environment.
*/
RTENV hEnv;
rc = RTEnvClone(&hEnv, RTENV_DEFAULT);
if (RT_SUCCESS(rc))
{
size_t i;
for (i = 0; i < pData->uNumEnvVars && pData->papszEnv; i++)
{
rc = RTEnvPutEx(hEnv, pData->papszEnv[i]);
if (RT_FAILURE(rc))
break;
}
if (RT_SUCCESS(rc))
{
/*
* Setup the redirection of the standard stuff.
*/
/** @todo consider supporting: gcc stuff.c >file 2>&1. */
RTHANDLE hStdIn;
PRTHANDLE phStdIn;
RTPIPE hStdInW;
rc = VBoxServiceControlExecSetupPipe(0 /* stdin */, &hStdIn, &phStdIn, &hStdInW);
if (RT_SUCCESS(rc))
{
RTHANDLE hStdOut;
PRTHANDLE phStdOut;
RTPIPE hStdOutR;
rc = VBoxServiceControlExecSetupPipe(1 /* stdout */, &hStdOut, &phStdOut, &hStdOutR);
if (RT_SUCCESS(rc))
{
RTHANDLE hStdErr;
PRTHANDLE phStdErr;
RTPIPE hStdErrR;
rc = VBoxServiceControlExecSetupPipe(2 /* stderr */, &hStdErr, &phStdErr, &hStdErrR);
if (RT_SUCCESS(rc))
{
/*
* Create a poll set for the pipes and let the
* transport layer add stuff to it as well.
*/
RTPOLLSET hPollSet;
rc = RTPollSetCreate(&hPollSet);
if (RT_SUCCESS(rc))
{
rc = RTPollSetAddPipe(hPollSet, hStdInW, RTPOLL_EVT_ERROR, 0 /* TXSEXECHNDID_STDIN */);
if (RT_SUCCESS(rc))
rc = RTPollSetAddPipe(hPollSet, hStdOutR, RTPOLL_EVT_READ | RTPOLL_EVT_ERROR, 1 /* TXSEXECHNDID_STDOUT */);
if (RT_SUCCESS(rc))
rc = RTPollSetAddPipe(hPollSet, hStdErrR, RTPOLL_EVT_READ | RTPOLL_EVT_ERROR, 2 /* TXSEXECHNDID_TESTPIPE */);
if (RT_SUCCESS(rc))
{
RTPROCESS hProcess;
rc = RTProcCreateEx(pData->pszCmd, pData->papszArgs, hEnv, RTPROC_FLAGS_SERVICE,
phStdIn, phStdOut, phStdErr,
strlen(pData->pszUser) ? pData->pszUser : NULL,
strlen(pData->pszUser) && strlen(pData->pszPassword) ? pData->pszPassword : NULL,
&hProcess);
if (RT_SUCCESS(rc))
{
/*
* Close the child ends of any pipes and redirected files.
*/
int rc2 = RTHandleClose(phStdIn); AssertRC(rc2);
phStdIn = NULL;
rc2 = RTHandleClose(phStdOut); AssertRC(rc2);
phStdOut = NULL;
rc2 = RTHandleClose(phStdErr); AssertRC(rc2);
phStdErr = NULL;
/* Enter the process loop. */
rc = VBoxServiceControlExecProcLoop(pThread,
hProcess, pData->uTimeLimitMS, hPollSet,
hStdInW, hStdOutR, hStdErrR);
/*
* The handles that are no longer in the set have
* been closed by the above call in order to prevent
* the guest from getting stuck accessing them.
* So, NIL the handles to avoid closing them again.
*/
if (RT_FAILURE(RTPollSetQueryHandle(hPollSet, 0 /* stdin */, NULL)))
hStdInW = NIL_RTPIPE;
if (RT_FAILURE(RTPollSetQueryHandle(hPollSet, 1 /* stdout */, NULL)))
hStdOutR = NIL_RTPIPE;
if (RT_FAILURE(RTPollSetQueryHandle(hPollSet, 2 /* stderr */, NULL)))
hStdErrR = NIL_RTPIPE;
}
else /* Something went wrong; report error! */
{
VBoxServiceError("ControlExec: Could not start process '%s' (CID: %u)! Error: %Rrc\n",
pData->pszCmd, pThread->uContextID, rc);
int rc2 = VbglR3GuestCtrlExecReportStatus(pThread->uClientID, pThread->uContextID, pData->uPID,
PROC_STS_ERROR, rc,
NULL /* pvData */, 0 /* cbData */);
if (RT_FAILURE(rc2))
VBoxServiceError("ControlExec: Could not report process start error! Error: %Rrc (process error %Rrc)\n",
rc2, rc);
}
}
}
RTPipeClose(hStdErrR);
RTHandleClose(phStdErr);
}
RTPipeClose(hStdOutR);
RTHandleClose(phStdOut);
}
RTPipeClose(hStdInW);
RTHandleClose(phStdIn);
}
}
RTEnvDestroy(hEnv);
}
VbglR3GuestCtrlDisconnect(pThread->uClientID);
VBoxServiceVerbose(3, "ControlExec: Thread of process \"%s\" (PID: %u) ended with rc=%Rrc\n",
pData->pszCmd, pData->uPID, rc);
return rc;
}
static DECLCALLBACK(int) VBoxServiceControlExecThread(RTTHREAD ThreadSelf, void *pvUser)
{
PVBOXSERVICECTRLTHREAD pThread = (VBOXSERVICECTRLTHREAD*)pvUser;
AssertPtr(pThread);
return VBoxServiceControlExecProcessWorker(pThread);
}
int VBoxServiceControlExecProcess(uint32_t uContextID, const char *pszCmd, uint32_t uFlags,
const char *pszArgs, uint32_t uNumArgs,
const char *pszEnv, uint32_t cbEnv, uint32_t uNumEnvVars,
const char *pszUser, const char *pszPassword, uint32_t uTimeLimitMS)
{
PVBOXSERVICECTRLTHREAD pThread = (PVBOXSERVICECTRLTHREAD)RTMemAlloc(sizeof(VBOXSERVICECTRLTHREAD));
int rc;
if (pThread)
{
rc = VBoxServiceControlExecAllocateThreadData(pThread,
uContextID,
pszCmd, uFlags,
pszArgs, uNumArgs,
pszEnv, cbEnv, uNumEnvVars,
pszUser, pszPassword,
uTimeLimitMS);
if (RT_SUCCESS(rc))
{
rc = RTThreadCreate(&pThread->Thread, VBoxServiceControlExecThread,
(void *)(PVBOXSERVICECTRLTHREAD*)pThread, 0,
RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "Exec");
if (RT_FAILURE(rc))
{
VBoxServiceError("ControlExec: RTThreadCreate failed, rc=%Rrc\n, pThread=%p\n",
rc, pThread);
}
else
{
/* Wait for the thread to initialize. */
RTThreadUserWait(pThread->Thread, 60 * 1000);
if (pThread->fShutdown)
{
VBoxServiceError("ControlExec: Thread for process \"%s\" failed to start!\n", pszCmd);
rc = VERR_GENERAL_FAILURE;
}
else
{
pThread->fStarted = true;
/*rc =*/ RTListAppend(&g_GuestControlExecThreads, &pThread->Node);
}
}
if (RT_FAILURE(rc))
VBoxServiceControlExecDestroyThreadData((PVBOXSERVICECTRLTHREADDATAEXEC)pThread->pvData);
}
if (RT_FAILURE(rc))
RTMemFree(pThread);
}
else
rc = VERR_NO_MEMORY;
return rc;
}