VBoxServiceControlProcess.cpp

Last change on this file was 106061, checked in by vboxsync, 6 days ago
Copyright year updates by scm.
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1	/* $Id: VBoxServiceControlProcess.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* VBoxServiceControlThread - Guest process handling.
4	*/
5
6	/*
7	* Copyright (C) 2012-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#include <iprt/asm.h>
33	#include <iprt/assert.h>
34	#include <iprt/env.h>
35	#include <iprt/file.h>
36	#include <iprt/getopt.h>
37	#include <iprt/handle.h>
38	#include <iprt/mem.h>
39	#include <iprt/path.h>
40	#include <iprt/pipe.h>
41	#include <iprt/poll.h>
42	#include <iprt/process.h>
43	#include <iprt/semaphore.h>
44	#include <iprt/string.h>
45	#include <iprt/string.h>
46	#include <iprt/system.h>
47	#include <iprt/thread.h>
48
49	#include <VBox/VBoxGuestLib.h>
50	#include <VBox/HostServices/GuestControlSvc.h>
51
52	#include "VBoxServiceInternal.h"
53	#include "VBoxServiceControl.h"
54	#include "VBoxServiceToolBox.h"
55
56	using namespace guestControl;
57
58
59	/*********************************************************************************************************************************
60	* Internal Functions *
61	*********************************************************************************************************************************/
62	static int vgsvcGstCtrlProcessAssignPID(PVBOXSERVICECTRLPROCESS pThread, uint32_t uPID);
63	static int vgsvcGstCtrlProcessLock(PVBOXSERVICECTRLPROCESS pProcess);
64	static int vgsvcGstCtrlProcessSetupPipe(const char pszHowTo, int fd, PRTHANDLE ph, PRTHANDLE pph,
65	PRTPIPE phPipe);
66	static int vgsvcGstCtrlProcessUnlock(PVBOXSERVICECTRLPROCESS pProcess);
67	/* Request handlers. */
68	static DECLCALLBACK(int) vgsvcGstCtrlProcessOnInput(PVBOXSERVICECTRLPROCESS pThis, const PVBGLR3GUESTCTRLCMDCTX pHostCtx,
69	bool fPendingClose, void *pvBuf, uint32_t cbBuf);
70	static DECLCALLBACK(int) vgsvcGstCtrlProcessOnOutput(PVBOXSERVICECTRLPROCESS pThis, const PVBGLR3GUESTCTRLCMDCTX pHostCtx,
71	uint32_t uHandle, uint32_t cbToRead, uint32_t uFlags);
72	static int vgsvcGstCtrlProcessRequestExV(PVBOXSERVICECTRLPROCESS pProcess, bool fAsync, RTMSINTERVAL cMsTimeout,
73	PFNRT pfnFunction, unsigned cArgs,
74	va_list Args) RT_IPRT_CALLREQ_ATTR(4, 5, 0); /* attrib req prototype */
75	static int vgsvcGstCtrlProcessRequestAsync(PVBOXSERVICECTRLPROCESS pProcess, PFNRT pfnFunction,
76	unsigned cArgs, ...) RT_IPRT_CALLREQ_ATTR(2, 3, 4); /* ditto */
77	#if 0 /* unused */
78	static int vgsvcGstCtrlProcessRequestWait(PVBOXSERVICECTRLPROCESS pProcess, RTMSINTERVAL cMsTimeout,
79	PFNRT pfnFunction, unsigned cArgs, ...) RT_IPRT_CALLREQ_ATTR(3, 4, 5);
80	#endif
81
82
83
84	/**
85	* Initialies the passed in thread data structure with the parameters given.
86	*
87	* @return IPRT status code.
88	* @param pProcess Process to initialize.
89	* @param pSession Guest session the process is bound to.
90	* @param pStartupInfo Startup information.
91	* @param u32ContextID The context ID bound to this request / command.
92	*/
93	static int vgsvcGstCtrlProcessInit(PVBOXSERVICECTRLPROCESS pProcess,
94	const PVBOXSERVICECTRLSESSION pSession,
95	const PVBGLR3GUESTCTRLPROCSTARTUPINFO pStartupInfo,
96	uint32_t u32ContextID)
97	{
98	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
99	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
100	AssertPtrReturn(pStartupInfo, VERR_INVALID_POINTER);
101
102	/* General stuff. */
103	pProcess->hProcess = NIL_RTPROCESS;
104	pProcess->pSession = pSession;
105	pProcess->Node.pPrev = NULL;
106	pProcess->Node.pNext = NULL;
107
108	pProcess->fShutdown = false;
109	pProcess->fStarted = false;
110	pProcess->fStopped = false;
111
112	pProcess->uPID = 0; /* Don't have a PID yet. */
113	pProcess->cRefs = 0;
114	/*
115	* Use the initial context ID we got for starting
116	* the process to report back its status with the
117	* same context ID.
118	*/
119	pProcess->uContextID = u32ContextID;
120	/*
121	* Note: pProcess->ClientID will be assigned when thread is started;
122	* every guest process has its own client ID to detect crashes on
123	* a per-guest-process level.
124	*/
125
126	int rc = RTCritSectInit(&pProcess->CritSect);
127	if (RT_FAILURE(rc))
128	return rc;
129
130	pProcess->hPollSet = NIL_RTPOLLSET;
131	pProcess->hPipeStdInW = NIL_RTPIPE;
132	pProcess->hPipeStdOutR = NIL_RTPIPE;
133	pProcess->hPipeStdErrR = NIL_RTPIPE;
134	pProcess->hNotificationPipeW = NIL_RTPIPE;
135	pProcess->hNotificationPipeR = NIL_RTPIPE;
136
137	rc = RTReqQueueCreate(&pProcess->hReqQueue);
138	AssertReleaseRC(rc);
139
140	/* Duplicate startup info. */
141	pProcess->pStartupInfo = VbglR3GuestCtrlProcStartupInfoDup(pStartupInfo);
142	AssertPtrReturn(pProcess->pStartupInfo, VERR_NO_MEMORY);
143
144	/* Adjust timeout value. */
145	if ( pProcess->pStartupInfo->uTimeLimitMS == UINT32_MAX
146	\|\| pProcess->pStartupInfo->uTimeLimitMS == 0)
147	pProcess->pStartupInfo->uTimeLimitMS = RT_INDEFINITE_WAIT;
148
149	if (RT_FAILURE(rc)) /* Clean up on failure. */
150	VGSvcGstCtrlProcessFree(pProcess);
151	return rc;
152	}
153
154
155	/**
156	* Frees a guest process. On success, pProcess will be
157	* free'd and thus won't be available anymore.
158	*
159	* @return IPRT status code.
160	* @param pProcess Guest process to free.
161	* The pointer will not be valid anymore after return.
162	*/
163	int VGSvcGstCtrlProcessFree(PVBOXSERVICECTRLPROCESS pProcess)
164	{
165	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
166
167	int rc = RTCritSectEnter(&pProcess->CritSect);
168	if (RT_SUCCESS(rc))
169	{
170	VGSvcVerbose(3, "[PID %RU32]: Freeing (cRefs=%RU32)...\n", pProcess->uPID, pProcess->cRefs);
171
172	AssertReturn(pProcess->cRefs == 0, VERR_WRONG_ORDER);
173	AssertReturn(pProcess->fStopped, VERR_WRONG_ORDER);
174	AssertReturn(pProcess->fShutdown, VERR_WRONG_ORDER);
175
176	VbglR3GuestCtrlProcStartupInfoFree(pProcess->pStartupInfo);
177	pProcess->pStartupInfo = NULL;
178
179	/*
180	* Destroy other thread data.
181	*/
182	rc = RTPollSetDestroy(pProcess->hPollSet);
183	AssertRC(rc);
184
185	rc = RTReqQueueDestroy(pProcess->hReqQueue);
186	AssertRC(rc);
187
188	rc = RTPipeClose(pProcess->hNotificationPipeR);
189	AssertRC(rc);
190	rc = RTPipeClose(pProcess->hNotificationPipeW);
191	AssertRC(rc);
192
193	rc = RTPipeClose(pProcess->hPipeStdInW);
194	AssertRC(rc);
195	rc = RTPipeClose(pProcess->hPipeStdErrR);
196	AssertRC(rc);
197	rc = RTPipeClose(pProcess->hPipeStdOutR);
198	AssertRC(rc);
199
200	rc = RTCritSectLeave(&pProcess->CritSect);
201	AssertRC(rc);
202
203	RTCritSectDelete(&pProcess->CritSect);
204
205	/*
206	* Destroy thread structure as final step.
207	*/
208	RTMemFree(pProcess);
209	pProcess = NULL;
210	}
211
212	return rc;
213	}
214
215
216	/**
217	* Signals a guest process thread that we want it to shut down in
218	* a gentle way.
219	*
220	* @return IPRT status code.
221	* @param pProcess Process to stop.
222	*/
223	int VGSvcGstCtrlProcessStop(PVBOXSERVICECTRLPROCESS pProcess)
224	{
225	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
226
227	VGSvcVerbose(3, "[PID %RU32]: Stopping ...\n", pProcess->uPID);
228
229	/* Do not set pThread->fShutdown or other stuff here!
230	* The guest thread loop will clean up itself. */
231
232	return VGSvcGstCtrlProcessHandleTerm(pProcess);
233	}
234
235
236	/**
237	* Releases a previously acquired guest process (decreases the refcount).
238	*
239	* @param pProcess Process to release.
240	*/
241	void VGSvcGstCtrlProcessRelease(PVBOXSERVICECTRLPROCESS pProcess)
242	{
243	AssertPtrReturnVoid(pProcess);
244
245	int rc2 = RTCritSectEnter(&pProcess->CritSect);
246	if (RT_SUCCESS(rc2))
247	{
248	AssertReturnVoid(pProcess->cRefs);
249	pProcess->cRefs--;
250
251	VGSvcVerbose(3, "[PID %RU32]: cRefs=%RU32, fShutdown=%RTbool, fStopped=%RTbool\n",
252	pProcess->uPID, pProcess->cRefs, pProcess->fShutdown, pProcess->fStopped);
253
254	rc2 = RTCritSectLeave(&pProcess->CritSect);
255	AssertRC(rc2);
256	}
257	}
258
259
260	/**
261	* Wait for a guest process thread to shut down.
262	*
263	* @return IPRT status code.
264	* @param pProcess Process to wait shutting down for.
265	* @param msTimeout Timeout in ms to wait for shutdown.
266	* @param prc Where to store the thread's return code.
267	* Optional.
268	*/
269	int VGSvcGstCtrlProcessWait(const PVBOXSERVICECTRLPROCESS pProcess, RTMSINTERVAL msTimeout, int *prc)
270	{
271	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
272	AssertPtrNullReturn(prc, VERR_INVALID_POINTER);
273
274	int rc = vgsvcGstCtrlProcessLock(pProcess);
275	if (RT_SUCCESS(rc))
276	{
277	if (RTThreadGetState(pProcess->Thread) != RTTHREADSTATE_INVALID) /* Is there a thread we can wait for? */
278	{
279	VGSvcVerbose(2, "[PID %RU32]: Waiting for shutdown (%RU32ms) ...\n", pProcess->uPID, msTimeout);
280
281	AssertMsgReturn(pProcess->fStarted,
282	("Tried to wait on guest process=%p (PID %RU32) which has not been started yet\n",
283	pProcess, pProcess->uPID), VERR_INVALID_PARAMETER);
284
285	/* Unlock process before waiting. */
286	rc = vgsvcGstCtrlProcessUnlock(pProcess);
287	AssertRC(rc);
288
289	/* Do the actual waiting. */
290	int rcThread;
291	Assert(pProcess->Thread != NIL_RTTHREAD);
292	rc = RTThreadWait(pProcess->Thread, msTimeout, &rcThread);
293
294	int rc2 = vgsvcGstCtrlProcessLock(pProcess);
295	AssertRC(rc2);
296
297	if (RT_SUCCESS(rc))
298	{
299	pProcess->Thread = NIL_RTTHREAD;
300	VGSvcVerbose(3, "[PID %RU32]: Thread shutdown complete, thread rc=%Rrc\n", pProcess->uPID, rcThread);
301	if (prc)
302	*prc = rcThread;
303	}
304	}
305
306	int rc2 = vgsvcGstCtrlProcessUnlock(pProcess);
307	AssertRC(rc2);
308	}
309
310	if (RT_FAILURE(rc))
311	VGSvcError("[PID %RU32]: Waiting for shutting down thread returned error rc=%Rrc\n", pProcess->uPID, rc);
312
313	VGSvcVerbose(3, "[PID %RU32]: Waiting resulted in rc=%Rrc\n", pProcess->uPID, rc);
314	return rc;
315	}
316
317
318	/**
319	* Closes the stdin pipe of a guest process.
320	*
321	* @return IPRT status code.
322	* @param pProcess The process which input pipe we close.
323	* @param phStdInW The standard input pipe handle.
324	*/
325	static int vgsvcGstCtrlProcessPollsetCloseInput(PVBOXSERVICECTRLPROCESS pProcess, PRTPIPE phStdInW)
326	{
327	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
328	AssertPtrReturn(phStdInW, VERR_INVALID_POINTER);
329
330	int rc = RTPollSetRemove(pProcess->hPollSet, VBOXSERVICECTRLPIPEID_STDIN);
331	if (rc != VERR_POLL_HANDLE_ID_NOT_FOUND)
332	AssertRC(rc);
333
334	if (*phStdInW != NIL_RTPIPE)
335	{
336	rc = RTPipeClose(*phStdInW);
337	AssertRC(rc);
338	*phStdInW = NIL_RTPIPE;
339	}
340
341	return rc;
342	}
343
344
345	#ifdef DEBUG
346	/**
347	* Names a poll handle ID.
348	*
349	* @returns Pointer to read-only string.
350	* @param idPollHnd What to name.
351	*/
352	static const char *vgsvcGstCtrlProcessPollHandleToString(uint32_t idPollHnd)
353	{
354	switch (idPollHnd)
355	{
356	case VBOXSERVICECTRLPIPEID_UNKNOWN:
357	return "unknown";
358	case VBOXSERVICECTRLPIPEID_STDIN:
359	return "stdin";
360	case VBOXSERVICECTRLPIPEID_STDIN_WRITABLE:
361	return "stdin_writable";
362	case VBOXSERVICECTRLPIPEID_STDOUT:
363	return "stdout";
364	case VBOXSERVICECTRLPIPEID_STDERR:
365	return "stderr";
366	case VBOXSERVICECTRLPIPEID_IPC_NOTIFY:
367	return "ipc_notify";
368	default:
369	return "unknown";
370	}
371	}
372	#endif /* DEBUG */
373
374
375	/**
376	* Handle an error event on standard input.
377	*
378	* @return IPRT status code.
379	* @param pProcess Process to handle pollset for.
380	* @param fPollEvt The event mask returned by RTPollNoResume.
381	* @param phStdInW The standard input pipe handle.
382	*/
383	static int vgsvcGstCtrlProcessPollsetOnInput(PVBOXSERVICECTRLPROCESS pProcess, uint32_t fPollEvt, PRTPIPE phStdInW)
384	{
385	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
386
387	NOREF(fPollEvt);
388
389	return vgsvcGstCtrlProcessPollsetCloseInput(pProcess, phStdInW);
390	}
391
392
393	/**
394	* Handle pending output data or error on standard out or standard error.
395	*
396	* @returns IPRT status code from client send.
397	* @param pProcess Process to handle pollset for.
398	* @param fPollEvt The event mask returned by RTPollNoResume.
399	* @param phPipeR The pipe handle.
400	* @param idPollHnd The pipe ID to handle.
401	*/
402	static int vgsvcGstCtrlProcessHandleOutputError(PVBOXSERVICECTRLPROCESS pProcess,
403	uint32_t fPollEvt, PRTPIPE phPipeR, uint32_t idPollHnd)
404	{
405	RT_NOREF1(fPollEvt);
406	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
407
408	if (!phPipeR)
409	return VINF_SUCCESS;
410
411	#ifdef DEBUG
412	VGSvcVerbose(4, "[PID %RU32]: Output error: idPollHnd=%s, fPollEvt=0x%x\n",
413	pProcess->uPID, vgsvcGstCtrlProcessPollHandleToString(idPollHnd), fPollEvt);
414	#endif
415
416	/* Remove pipe from poll set. */
417	int rc2 = RTPollSetRemove(pProcess->hPollSet, idPollHnd);
418	AssertMsg(RT_SUCCESS(rc2) \|\| rc2 == VERR_POLL_HANDLE_ID_NOT_FOUND, ("%Rrc\n", rc2));
419
420	bool fClosePipe = true; /* By default close the pipe. */
421
422	/* Check if there's remaining data to read from the pipe. */
423	if (*phPipeR != NIL_RTPIPE)
424	{
425	size_t cbReadable;
426	rc2 = RTPipeQueryReadable(*phPipeR, &cbReadable);
427	if ( RT_SUCCESS(rc2)
428	&& cbReadable)
429	{
430	#ifdef DEBUG
431	VGSvcVerbose(3, "[PID %RU32]: idPollHnd=%s has %zu bytes left, vetoing close\n",
432	pProcess->uPID, vgsvcGstCtrlProcessPollHandleToString(idPollHnd), cbReadable);
433	#endif
434	/* Veto closing the pipe yet because there's still stuff to read
435	* from the pipe. This can happen on UNIX-y systems where on
436	* error/hangup there still can be data to be read out. */
437	fClosePipe = false;
438	}
439	}
440	#ifdef DEBUG
441	else
442	VGSvcVerbose(3, "[PID %RU32]: idPollHnd=%s will be closed\n",
443	pProcess->uPID, vgsvcGstCtrlProcessPollHandleToString(idPollHnd));
444	#endif
445
446	if ( *phPipeR != NIL_RTPIPE
447	&& fClosePipe)
448	{
449	rc2 = RTPipeClose(*phPipeR);
450	AssertRC(rc2);
451	*phPipeR = NIL_RTPIPE;
452	}
453
454	return VINF_SUCCESS;
455	}
456
457
458	/**
459	* Handle pending output data or error on standard out or standard error.
460	*
461	* @returns IPRT status code from client send.
462	* @param pProcess Process to handle pollset for.
463	* @param fPollEvt The event mask returned by RTPollNoResume.
464	* @param phPipeR The pipe handle.
465	* @param idPollHnd The pipe ID to handle.
466	*
467	*/
468	static int vgsvcGstCtrlProcessPollsetOnOutput(PVBOXSERVICECTRLPROCESS pProcess,
469	uint32_t fPollEvt, PRTPIPE phPipeR, uint32_t idPollHnd)
470	{
471	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
472
473	#ifdef DEBUG
474	VGSvcVerbose(4, "[PID %RU32]: Output event phPipeR=%p, idPollHnd=%s, fPollEvt=0x%x\n",
475	pProcess->uPID, phPipeR, vgsvcGstCtrlProcessPollHandleToString(idPollHnd), fPollEvt);
476	#endif
477
478	if (!phPipeR)
479	return VINF_SUCCESS;
480
481	int rc = VINF_SUCCESS;
482
483	#ifdef DEBUG
484	if (*phPipeR != NIL_RTPIPE)
485	{
486	size_t cbReadable;
487	rc = RTPipeQueryReadable(*phPipeR, &cbReadable);
488	if ( RT_SUCCESS(rc)
489	&& cbReadable)
490	{
491	VGSvcVerbose(4, "[PID %RU32]: Output event cbReadable=%zu\n", pProcess->uPID, cbReadable);
492	}
493	}
494	#endif
495
496	#if 0
497	/* Push output to the host. */
498	if (fPollEvt & RTPOLL_EVT_READ)
499	{
500	size_t cbRead = 0;
501	uint8_t byData[_64K];
502	rc = RTPipeRead(*phPipeR, byData, sizeof(byData), &cbRead);
503	VGSvcVerbose(4, "VGSvcGstCtrlProcessHandleOutputEvent cbRead=%u, rc=%Rrc\n", cbRead, rc);
504
505	/* Make sure we go another poll round in case there was too much data
506	for the buffer to hold. */
507	fPollEvt &= RTPOLL_EVT_ERROR;
508	}
509	#endif
510
511	if (fPollEvt & RTPOLL_EVT_ERROR)
512	rc = vgsvcGstCtrlProcessHandleOutputError(pProcess, fPollEvt, phPipeR, idPollHnd);
513	return rc;
514	}
515
516
517	/**
518	* Execution loop which runs in a dedicated per-started-process thread and
519	* handles all pipe input/output and signalling stuff.
520	*
521	* @return IPRT status code.
522	* @param pProcess The guest process to handle.
523	*/
524	static int vgsvcGstCtrlProcessProcLoop(PVBOXSERVICECTRLPROCESS pProcess)
525	{
526	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
527
528	int rc;
529	int rc2;
530	uint64_t const uMsStart = RTTimeMilliTS();
531	RTPROCSTATUS ProcessStatus = { 254, RTPROCEXITREASON_ABEND };
532	bool fProcessAlive = true;
533	bool fProcessTimedOut = false;
534	uint64_t MsProcessKilled = UINT64_MAX;
535	RTMSINTERVAL const cMsPollBase = pProcess->hPipeStdInW != NIL_RTPIPE
536	? 100 /* Need to poll for input. */
537	: 1000; /* Need only poll for process exit and aborts. */
538	RTMSINTERVAL cMsPollCur = 0;
539
540	/*
541	* Assign PID to thread data.
542	* Also check if there already was a thread with the same PID and shut it down -- otherwise
543	* the first (stale) entry will be found and we get really weird results!
544	*/
545	rc = vgsvcGstCtrlProcessAssignPID(pProcess, pProcess->hProcess /* Opaque PID handle */);
546	if (RT_FAILURE(rc))
547	{
548	VGSvcError("Unable to assign PID=%u, to new thread, rc=%Rrc\n", pProcess->hProcess, rc);
549	return rc;
550	}
551
552	/*
553	* Before entering the loop, tell the host that we've started the guest
554	* and that it's now OK to send input to the process.
555	*/
556	VGSvcVerbose(2, "[PID %RU32]: Process '%s' started, CID=%u, User=%s, cMsTimeout=%RU32\n",
557	pProcess->uPID, pProcess->pStartupInfo->pszCmd, pProcess->uContextID,
558	pProcess->pStartupInfo->pszUser, pProcess->pStartupInfo->uTimeLimitMS);
559	VBGLR3GUESTCTRLCMDCTX ctxStart = { g_idControlSvcClient, pProcess->uContextID, 0 /* uProtocol /, 0 / uNumParms */ };
560	rc = VbglR3GuestCtrlProcCbStatus(&ctxStart,
561	pProcess->uPID, PROC_STS_STARTED, 0 /* u32Flags */,
562	NULL /* pvData /, 0 / cbData */);
563	if (rc == VERR_INTERRUPTED)
564	rc = VINF_SUCCESS; /* SIGCHLD send by quick childs! */
565	if (RT_FAILURE(rc))
566	VGSvcError("[PID %RU32]: Error reporting starting status to host, rc=%Rrc\n", pProcess->uPID, rc);
567
568	/*
569	* Process input, output, the test pipe and client requests.
570	*/
571	while ( RT_SUCCESS(rc)
572	&& RT_UNLIKELY(!pProcess->fShutdown))
573	{
574	/*
575	* Wait/Process all pending events.
576	*/
577	uint32_t idPollHnd;
578	uint32_t fPollEvt;
579	rc2 = RTPollNoResume(pProcess->hPollSet, cMsPollCur, &fPollEvt, &idPollHnd);
580	if (pProcess->fShutdown)
581	continue;
582
583	cMsPollCur = 0; /* No rest until we've checked everything. */
584
585	if (RT_SUCCESS(rc2))
586	{
587	switch (idPollHnd)
588	{
589	case VBOXSERVICECTRLPIPEID_STDIN:
590	rc = vgsvcGstCtrlProcessPollsetOnInput(pProcess, fPollEvt, &pProcess->hPipeStdInW);
591	break;
592
593	case VBOXSERVICECTRLPIPEID_STDOUT:
594	rc = vgsvcGstCtrlProcessPollsetOnOutput(pProcess, fPollEvt, &pProcess->hPipeStdOutR, idPollHnd);
595	break;
596
597	case VBOXSERVICECTRLPIPEID_STDERR:
598	rc = vgsvcGstCtrlProcessPollsetOnOutput(pProcess, fPollEvt, &pProcess->hPipeStdErrR, idPollHnd);
599	break;
600
601	case VBOXSERVICECTRLPIPEID_IPC_NOTIFY:
602	#ifdef DEBUG_andy
603	VGSvcVerbose(4, "[PID %RU32]: IPC notify\n", pProcess->uPID);
604	#endif
605	rc2 = vgsvcGstCtrlProcessLock(pProcess);
606	if (RT_SUCCESS(rc2))
607	{
608	/* Drain the notification pipe. */
609	uint8_t abBuf[8];
610	size_t cbIgnore;
611	rc2 = RTPipeRead(pProcess->hNotificationPipeR, abBuf, sizeof(abBuf), &cbIgnore);
612	if (RT_FAILURE(rc2))
613	VGSvcError("Draining IPC notification pipe failed with rc=%Rrc\n", rc2);
614
615	/* Process all pending requests. */
616	VGSvcVerbose(4, "[PID %RU32]: Processing pending requests ...\n", pProcess->uPID);
617	Assert(pProcess->hReqQueue != NIL_RTREQQUEUE);
618	rc2 = RTReqQueueProcess(pProcess->hReqQueue,
619	0 /* Only process all pending requests, don't wait for new ones */);
620	if ( RT_FAILURE(rc2)
621	&& rc2 != VERR_TIMEOUT)
622	VGSvcError("Processing requests failed with with rc=%Rrc\n", rc2);
623
624	int rc3 = vgsvcGstCtrlProcessUnlock(pProcess);
625	AssertRC(rc3);
626	#ifdef DEBUG
627	VGSvcVerbose(4, "[PID %RU32]: Processing pending requests done, rc=%Rrc\n", pProcess->uPID, rc2);
628	#endif
629	}
630
631	break;
632
633	default:
634	AssertMsgFailed(("Unknown idPollHnd=%RU32\n", idPollHnd));
635	break;
636	}
637
638	if (RT_FAILURE(rc) \|\| rc == VINF_EOF)
639	break; /* Abort command, or client dead or something. */
640	}
641	#if 0
642	VGSvcVerbose(4, "[PID %RU32]: Polling done, pollRc=%Rrc, pollCnt=%RU32, idPollHnd=%s, rc=%Rrc, fProcessAlive=%RTbool, fShutdown=%RTbool\n",
643	pProcess->uPID, rc2, RTPollSetGetCount(hPollSet), vgsvcGstCtrlProcessPollHandleToString(idPollHnd), rc, fProcessAlive, pProcess->fShutdown);
644	VGSvcVerbose(4, "[PID %RU32]: stdOut=%s, stdErrR=%s\n",
645	pProcess->uPID,
646	*phStdOutR == NIL_RTPIPE ? "closed" : "open",
647	*phStdErrR == NIL_RTPIPE ? "closed" : "open");
648	#endif
649	if (RT_UNLIKELY(pProcess->fShutdown))
650	break; /* We were asked to shutdown. */
651
652	/*
653	* Check for process death.
654	*/
655	if (fProcessAlive)
656	{
657	rc2 = RTProcWaitNoResume(pProcess->hProcess, RTPROCWAIT_FLAGS_NOBLOCK, &ProcessStatus);
658	if (RT_SUCCESS_NP(rc2))
659	{
660	fProcessAlive = false;
661	/* Note: Don't bail out here yet. First check in the next block below
662	* if all needed pipe outputs have been consumed. */
663	}
664	else
665	{
666	if (RT_UNLIKELY(rc2 == VERR_INTERRUPTED))
667	continue;
668	if (RT_UNLIKELY(rc2 == VERR_PROCESS_NOT_FOUND))
669	{
670	fProcessAlive = false;
671	ProcessStatus.enmReason = RTPROCEXITREASON_ABEND;
672	ProcessStatus.iStatus = 255;
673	AssertFailed();
674	}
675	else
676	AssertMsg(rc2 == VERR_PROCESS_RUNNING, ("%Rrc\n", rc2));
677	}
678	}
679
680	/*
681	* If the process has terminated and all output has been consumed,
682	* we should be heading out.
683	*/
684	if (!fProcessAlive)
685	{
686	if ( fProcessTimedOut
687	\|\| ( pProcess->hPipeStdOutR == NIL_RTPIPE
688	&& pProcess->hPipeStdErrR == NIL_RTPIPE)
689	)
690	{
691	VGSvcVerbose(3, "[PID %RU32]: RTProcWaitNoResume=%Rrc\n", pProcess->uPID, rc2);
692	break;
693	}
694	}
695
696	/*
697	* Check for timed out, killing the process.
698	*/
699	uint32_t cMilliesLeft = RT_INDEFINITE_WAIT;
700	if ( pProcess->pStartupInfo->uTimeLimitMS != RT_INDEFINITE_WAIT
701	&& pProcess->pStartupInfo->uTimeLimitMS != 0)
702	{
703	uint64_t u64Now = RTTimeMilliTS();
704	uint64_t cMsElapsed = u64Now - uMsStart;
705	if (cMsElapsed >= pProcess->pStartupInfo->uTimeLimitMS)
706	{
707	fProcessTimedOut = true;
708	if ( MsProcessKilled == UINT64_MAX
709	\|\| u64Now - MsProcessKilled > 1000)
710	{
711	if (u64Now - MsProcessKilled > 20601000)
712	break; /* Give up after 20 mins. */
713
714	VGSvcVerbose(3, "[PID %RU32]: Timed out (%RU64ms elapsed > %RU32ms timeout), killing ...\n",
715	pProcess->uPID, cMsElapsed, pProcess->pStartupInfo->uTimeLimitMS);
716
717	rc2 = RTProcTerminate(pProcess->hProcess);
718	VGSvcVerbose(3, "[PID %RU32]: Killing process resulted in rc=%Rrc\n",
719	pProcess->uPID, rc2);
720	MsProcessKilled = u64Now;
721	continue;
722	}
723	cMilliesLeft = 10000;
724	}
725	else
726	cMilliesLeft = pProcess->pStartupInfo->uTimeLimitMS - (uint32_t)cMsElapsed;
727	}
728
729	/* Reset the polling interval since we've done all pending work. */
730	cMsPollCur = fProcessAlive
731	? cMsPollBase
732	: RT_MS_1MIN;
733	if (cMilliesLeft < cMsPollCur)
734	cMsPollCur = cMilliesLeft;
735	}
736
737	VGSvcVerbose(3, "[PID %RU32]: Loop ended: rc=%Rrc, fShutdown=%RTbool, fProcessAlive=%RTbool, fProcessTimedOut=%RTbool, MsProcessKilled=%RU64 (%RX64)\n",
738	pProcess->uPID, rc, pProcess->fShutdown, fProcessAlive, fProcessTimedOut, MsProcessKilled, MsProcessKilled);
739	VGSvcVerbose(3, "[PID %RU32]: phStdOutR=%s, phStdErrR=%s\n",
740	pProcess->uPID,
741	pProcess->hPipeStdOutR == NIL_RTPIPE ? "closed" : "open",
742	pProcess->hPipeStdErrR == NIL_RTPIPE ? "closed" : "open");
743
744	/* Signal that this thread is in progress of shutting down. */
745	ASMAtomicWriteBool(&pProcess->fShutdown, true);
746
747	/*
748	* Try killing the process if it's still alive at this point.
749	*/
750	if (fProcessAlive)
751	{
752	if (MsProcessKilled == UINT64_MAX)
753	{
754	VGSvcVerbose(2, "[PID %RU32]: Is still alive and not killed yet\n", pProcess->uPID);
755
756	MsProcessKilled = RTTimeMilliTS();
757	rc2 = RTProcTerminate(pProcess->hProcess);
758	if (rc2 == VERR_NOT_FOUND)
759	{
760	fProcessAlive = false;
761	}
762	else if (RT_FAILURE(rc2))
763	VGSvcError("[PID %RU32]: Killing process failed with rc=%Rrc\n", pProcess->uPID, rc2);
764	RTThreadSleep(500);
765	}
766
767	for (int i = 0; i < 10 && fProcessAlive; i++)
768	{
769	VGSvcVerbose(4, "[PID %RU32]: Kill attempt %d/10: Waiting to exit ...\n", pProcess->uPID, i + 1);
770	rc2 = RTProcWait(pProcess->hProcess, RTPROCWAIT_FLAGS_NOBLOCK, &ProcessStatus);
771	if (RT_SUCCESS(rc2))
772	{
773	VGSvcVerbose(4, "[PID %RU32]: Kill attempt %d/10: Exited\n", pProcess->uPID, i + 1);
774	fProcessAlive = false;
775	break;
776	}
777	if (i >= 5)
778	{
779	VGSvcVerbose(4, "[PID %RU32]: Kill attempt %d/10: Trying to terminate ...\n", pProcess->uPID, i + 1);
780	rc2 = RTProcTerminate(pProcess->hProcess);
781	if ( RT_FAILURE(rc)
782	&& rc2 != VERR_NOT_FOUND)
783	VGSvcError("PID %RU32]: Killing process failed with rc=%Rrc\n",
784	pProcess->uPID, rc2);
785	}
786	RTThreadSleep(i >= 5 ? 2000 : 500);
787	}
788
789	if (fProcessAlive)
790	VGSvcError("[PID %RU32]: Could not be killed\n", pProcess->uPID);
791	}
792
793	/*
794	* Shutdown procedure:
795	* - Set the pProcess->fShutdown indicator to let others know we're
796	* not accepting any new requests anymore.
797	* - After setting the indicator, try to process all outstanding
798	* requests to make sure they're getting delivered.
799	*
800	* Note: After removing the process from the session's list it's not
801	* even possible for the session anymore to control what's
802	* happening to this thread, so be careful and don't mess it up.
803	*/
804
805	rc2 = vgsvcGstCtrlProcessLock(pProcess);
806	if (RT_SUCCESS(rc2))
807	{
808	VGSvcVerbose(3, "[PID %RU32]: Processing outstanding requests ...\n", pProcess->uPID);
809
810	/* Process all pending requests (but don't wait for new ones). */
811	Assert(pProcess->hReqQueue != NIL_RTREQQUEUE);
812	rc2 = RTReqQueueProcess(pProcess->hReqQueue, 0 /* No timeout */);
813	if ( RT_FAILURE(rc2)
814	&& rc2 != VERR_TIMEOUT)
815	VGSvcError("[PID %RU32]: Processing outstanding requests failed with with rc=%Rrc\n", pProcess->uPID, rc2);
816
817	VGSvcVerbose(3, "[PID %RU32]: Processing outstanding requests done, rc=%Rrc\n", pProcess->uPID, rc2);
818
819	rc2 = vgsvcGstCtrlProcessUnlock(pProcess);
820	AssertRC(rc2);
821	}
822
823	/*
824	* If we don't have a client problem (RT_FAILURE(rc)) we'll reply to the
825	* clients exec packet now.
826	*/
827	if (RT_SUCCESS(rc))
828	{
829	uint32_t uStatus = PROC_STS_UNDEFINED;
830	uint32_t fFlags = 0;
831
832	if ( fProcessTimedOut && !fProcessAlive && MsProcessKilled != UINT64_MAX)
833	{
834	VGSvcVerbose(3, "[PID %RU32]: Timed out and got killed\n", pProcess->uPID);
835	uStatus = PROC_STS_TOK;
836	}
837	else if (fProcessTimedOut && fProcessAlive && MsProcessKilled != UINT64_MAX)
838	{
839	VGSvcVerbose(3, "[PID %RU32]: Timed out and did not get killed\n", pProcess->uPID);
840	uStatus = PROC_STS_TOA;
841	}
842	else if (pProcess->fShutdown && (fProcessAlive \|\| MsProcessKilled != UINT64_MAX))
843	{
844	VGSvcVerbose(3, "[PID %RU32]: Got terminated because system/service is about to shutdown\n", pProcess->uPID);
845	uStatus = PROC_STS_DWN; /* Service is stopping, process was killed. */
846	fFlags = pProcess->pStartupInfo->fFlags; /* Return handed-in execution flags back to the host. */
847	}
848	else if (fProcessAlive)
849	VGSvcError("[PID %RU32]: Is alive when it should not!\n", pProcess->uPID);
850	else if (MsProcessKilled != UINT64_MAX)
851	VGSvcError("[PID %RU32]: Has been killed when it should not!\n", pProcess->uPID);
852	else if (ProcessStatus.enmReason == RTPROCEXITREASON_NORMAL)
853	{
854	VGSvcVerbose(3, "[PID %RU32]: Ended with RTPROCEXITREASON_NORMAL (Exit code: %d)\n",
855	pProcess->uPID, ProcessStatus.iStatus);
856	uStatus = PROC_STS_TEN;
857	fFlags = ProcessStatus.iStatus;
858	}
859	else if (ProcessStatus.enmReason == RTPROCEXITREASON_SIGNAL)
860	{
861	VGSvcVerbose(3, "[PID %RU32]: Ended with RTPROCEXITREASON_SIGNAL (Signal: %u)\n",
862	pProcess->uPID, ProcessStatus.iStatus);
863	uStatus = PROC_STS_TES;
864	fFlags = ProcessStatus.iStatus;
865	}
866	else if (ProcessStatus.enmReason == RTPROCEXITREASON_ABEND)
867	{
868	/* ProcessStatus.iStatus will be undefined. */
869	VGSvcVerbose(3, "[PID %RU32]: Ended with RTPROCEXITREASON_ABEND\n", pProcess->uPID);
870	uStatus = PROC_STS_TEA;
871	fFlags = ProcessStatus.iStatus;
872	}
873	else
874	VGSvcVerbose(1, "[PID %RU32]: Handling process status %u not implemented\n", pProcess->uPID, ProcessStatus.enmReason);
875	VBGLR3GUESTCTRLCMDCTX ctxEnd = { g_idControlSvcClient, pProcess->uContextID, 0 /* uProtocol /, 0 / uNumParms */ };
876	VGSvcVerbose(2, "[PID %RU32]: Ended, ClientID=%u, CID=%u, Status=%u, Flags=0x%x\n",
877	pProcess->uPID, ctxEnd.uClientID, pProcess->uContextID, uStatus, fFlags);
878
879	rc2 = VbglR3GuestCtrlProcCbStatus(&ctxEnd, pProcess->uPID, uStatus, fFlags, NULL /* pvData /, 0 / cbData */);
880	if ( RT_FAILURE(rc2)
881	&& rc2 == VERR_NOT_FOUND)
882	VGSvcError("[PID %RU32]: Error reporting final status to host; rc=%Rrc\n", pProcess->uPID, rc2);
883	}
884
885	VGSvcVerbose(3, "[PID %RU32]: Process loop returned with rc=%Rrc\n", pProcess->uPID, rc);
886	return rc;
887	}
888
889
890	#if 0 /* unused */
891	/**
892	* Initializes a pipe's handle and pipe object.
893	*
894	* @return IPRT status code.
895	* @param ph The pipe's handle to initialize.
896	* @param phPipe The pipe's object to initialize.
897	*/
898	static int vgsvcGstCtrlProcessInitPipe(PRTHANDLE ph, PRTPIPE phPipe)
899	{
900	AssertPtrReturn(ph, VERR_INVALID_PARAMETER);
901	AssertPtrReturn(phPipe, VERR_INVALID_PARAMETER);
902
903	ph->enmType = RTHANDLETYPE_PIPE;
904	ph->u.hPipe = NIL_RTPIPE;
905	*phPipe = NIL_RTPIPE;
906
907	return VINF_SUCCESS;
908	}
909	#endif
910
911
912	/**
913	* Sets up the redirection / pipe / nothing for one of the standard handles.
914	*
915	* @returns IPRT status code. No client replies made.
916	* @param pszHowTo How to set up this standard handle.
917	* @param fd Which standard handle it is (0 == stdin, 1 ==
918	* stdout, 2 == stderr).
919	* @param ph The generic handle that @a pph may be set
920	* pointing to. Always set.
921	* @param pph Pointer to the RTProcCreateExec argument.
922	* Always set.
923	* @param phPipe Where to return the end of the pipe that we
924	* should service.
925	*/
926	static int vgsvcGstCtrlProcessSetupPipe(const char pszHowTo, int fd, PRTHANDLE ph, PRTHANDLE pph, PRTPIPE phPipe)
927	{
928	AssertPtrReturn(ph, VERR_INVALID_POINTER);
929	AssertPtrReturn(pph, VERR_INVALID_POINTER);
930	AssertPtrReturn(phPipe, VERR_INVALID_POINTER);
931
932	int rc;
933
934	ph->enmType = RTHANDLETYPE_PIPE;
935	ph->u.hPipe = NIL_RTPIPE;
936	*pph = NULL;
937	*phPipe = NIL_RTPIPE;
938
939	if (!strcmp(pszHowTo, "\|"))
940	{
941	/*
942	* Setup a pipe for forwarding to/from the client.
943	* The ph union struct will be filled with a pipe read/write handle
944	* to represent the "other" end to phPipe.
945	*/
946	if (fd == 0) /* stdin? */
947	{
948	/* Connect a wrtie pipe specified by phPipe to stdin. */
949	rc = RTPipeCreate(&ph->u.hPipe, phPipe, RTPIPE_C_INHERIT_READ);
950	}
951	else /* stdout or stderr. */
952	{
953	/* Connect a read pipe specified by phPipe to stdout or stderr. */
954	rc = RTPipeCreate(phPipe, &ph->u.hPipe, RTPIPE_C_INHERIT_WRITE);
955	}
956
957	if (RT_FAILURE(rc))
958	return rc;
959
960	ph->enmType = RTHANDLETYPE_PIPE;
961	*pph = ph;
962	}
963	else if (!strcmp(pszHowTo, "/dev/null"))
964	{
965	/*
966	* Redirect to/from /dev/null.
967	*/
968	RTFILE hFile;
969	rc = RTFileOpenBitBucket(&hFile, fd == 0 ? RTFILE_O_READ : RTFILE_O_WRITE);
970	if (RT_FAILURE(rc))
971	return rc;
972
973	ph->enmType = RTHANDLETYPE_FILE;
974	ph->u.hFile = hFile;
975	*pph = ph;
976	}
977	else /* Add other piping stuff here. */
978	rc = VINF_SUCCESS; /* Same as parent (us). */
979
980	return rc;
981	}
982
983
984	/**
985	* Expands a file name / path to its real content.
986	*
987	* ~~This only works on Windows for now (e.g. translating "%TEMP%\foo.exe" to
988	* "C:\Windows\Temp" when starting with system / administrative rights).~~ See
989	* todo in code.
990	*
991	* @return IPRT status code.
992	* @param pszPath Path to resolve.
993	* @param pszExpanded Pointer to string to store the resolved path in.
994	* @param cbExpanded Size (in bytes) of string to store the resolved path.
995	*/
996	static int vgsvcGstCtrlProcessMakeFullPath(const char pszPath, char pszExpanded, size_t cbExpanded)
997	{
998	/** @todo r=bird: This feature shall be made optional, i.e. require a
999	* flag to be passed down. Further, it shall work on the environment
1000	* block of the new process (i.e. include env changes passed down from
1001	* the caller). I would also suggest using the unix variable expansion
1002	* syntax, not the DOS one.
1003	*
1004	* Since this currently not available on non-windows guests, I suggest
1005	* we disable it until such a time as it is implemented correctly. */
1006	#if 0 /def RT_OS_WINDOWS - see above. Don't know why this wasn't disabled before 7.0, didn't see the @todo yet? /
1007	int rc = VINF_SUCCESS;
1008	if (!ExpandEnvironmentStrings(pszPath, pszExpanded, (DWORD)cbExpanded))
1009	rc = RTErrConvertFromWin32(GetLastError());
1010	#else
1011	/* There is no expansion anywhere yet, see above @todo. */
1012	int rc = RTStrCopy(pszExpanded, cbExpanded, pszPath);
1013	#endif
1014	#ifdef DEBUG
1015	VGSvcVerbose(3, "vgsvcGstCtrlProcessMakeFullPath: %s -> %s\n", pszPath, pszExpanded);
1016	#endif
1017	return rc;
1018	}
1019
1020
1021	/**
1022	* Resolves the full path of a specified executable name.
1023	*
1024	* This function also resolves internal VBoxService tools to its appropriate
1025	* executable path + name if VBOXSERVICE_NAME is specified as pszFilename.
1026	*
1027	* @return IPRT status code.
1028	* @param pszFilename File name to resolve.
1029	* @param pszResolved Pointer to a string where the resolved file name will be stored.
1030	* @param cbResolved Size (in bytes) of resolved file name string.
1031	*/
1032	static int vgsvcGstCtrlProcessResolveExecutable(const char pszFilename, char pszResolved, size_t cbResolved)
1033	{
1034	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
1035	AssertPtrReturn(pszResolved, VERR_INVALID_POINTER);
1036	AssertReturn(cbResolved, VERR_INVALID_PARAMETER);
1037
1038	const char * const pszOrgFilename = pszFilename;
1039	if ( RTStrICmp(pszFilename, g_pszProgName) == 0
1040	\|\| RTStrICmp(pszFilename, VBOXSERVICE_NAME) == 0)
1041	pszFilename = RTProcExecutablePath();
1042
1043	int rc = vgsvcGstCtrlProcessMakeFullPath(pszFilename, pszResolved, cbResolved);
1044	if (RT_SUCCESS(rc))
1045	VGSvcVerbose(3, "Looked up executable: %s -> %s\n", pszOrgFilename, pszResolved);
1046	return rc;
1047	}
1048
1049
1050	/**
1051	* Constructs the argv command line by resolving environment variables
1052	* and relative paths.
1053	*
1054	* @return IPRT status code.
1055	* @param pszArgv0 First argument (argv0), either original or modified version.
1056	* @param papszArgs Original argv command line from the host, starting at argv[1].
1057	* @param fFlags The process creation flags pass to us from the host.
1058	* @param fExecutingSelf Set if we're executing the VBoxService executable
1059	* and should inject the --utf8-argv trick.
1060	* @param ppapszArgv Pointer to a pointer with the new argv command line.
1061	* Needs to be freed with RTGetOptArgvFree.
1062	*/
1063	static int vgsvcGstCtrlProcessAllocateArgv(const char pszArgv0, const char const *papszArgs, uint32_t fFlags,
1064	bool fExecutingSelf, char ***ppapszArgv)
1065	{
1066	VGSvcVerbose(3, "VGSvcGstCtrlProcessPrepareArgv: pszArgv0=%p, papszArgs=%p, fFlags=%#x, fExecutingSelf=%d, ppapszArgv=%p\n",
1067	pszArgv0, papszArgs, fFlags, fExecutingSelf, ppapszArgv);
1068
1069	AssertPtrReturn(pszArgv0, VERR_INVALID_POINTER);
1070	AssertPtrReturn(ppapszArgv, VERR_INVALID_POINTER);
1071	AssertReturn(!(fFlags & GUEST_PROC_CREATE_FLAG_EXPAND_ARGUMENTS), VERR_INVALID_FLAGS); /** @todo implement me */
1072
1073	#ifndef VBOXSERVICE_ARG1_UTF8_ARGV
1074	fExecutingSelf = false;
1075	#endif
1076
1077	/* Count arguments: */
1078	int rc = VINF_SUCCESS;
1079	uint32_t cArgs;
1080	for (cArgs = 0; papszArgs[cArgs]; cArgs++)
1081	{
1082	if (cArgs >= UINT32_MAX - 2)
1083	return VERR_BUFFER_OVERFLOW;
1084	}
1085
1086	/* Allocate new argv vector (adding + 2 for argv0 + termination). */
1087	size_t cbSize = (fExecutingSelf + cArgs + 2) * sizeof(char *);
1088	char papszNewArgv = (char )RTMemAlloc(cbSize);
1089	if (!papszNewArgv)
1090	return VERR_NO_MEMORY;
1091
1092	VGSvcVerbose(3, "VGSvcGstCtrlProcessAllocateArgv: pszArgv0 = '%s', cArgs=%RU32, cbSize=%zu\n", pszArgv0, cArgs, cbSize);
1093	#ifdef DEBUG /* Never log this stuff in release mode! */
1094	if (cArgs)
1095	{
1096	for (uint32_t i = 0; i < cArgs; i++)
1097	VGSvcVerbose(3, "VGSvcGstCtrlProcessAllocateArgv: papszArgs[%RU32] = '%s'\n", i, papszArgs[i]);
1098	}
1099	#endif
1100
1101	/* HACK ALERT! Older hosts (< VBox 6.1.x) did not allow the user to really specify
1102	the first argument separately from the executable image, so we have
1103	to fudge a little in the unquoted argument case to deal with executables
1104	containing spaces. Windows only, as RTPROC_FLAGS_UNQUOTED_ARGS is
1105	ignored on all other hosts. */
1106	#ifdef RT_OS_WINDOWS
1107	if ( (fFlags & GUEST_PROC_CREATE_FLAG_UNQUOTED_ARGS)
1108	&& strpbrk(pszArgv0, " \t\n\r")
1109	&& pszArgv0[0] == '"')
1110	{
1111	size_t cchArgv0 = strlen(pszArgv0);
1112	AssertReturn(cchArgv0, VERR_INVALID_PARAMETER); /* Paranoia. */
1113	rc = RTStrAllocEx(&papszNewArgv[0], 1 + cchArgv0 + 1 + 1);
1114	if (RT_SUCCESS(rc))
1115	{
1116	char *pszDst = papszNewArgv[0];
1117	*pszDst++ = '"';
1118	memcpy(pszDst, pszArgv0, cchArgv0);
1119	pszDst += cchArgv0;
1120	*pszDst++ = '"';
1121	*pszDst = '\0';
1122	}
1123	}
1124	else
1125	#endif
1126	rc = RTStrDupEx(&papszNewArgv[0], pszArgv0);
1127	if (RT_SUCCESS(rc))
1128	{
1129	size_t iDst = 1;
1130
1131	#ifdef VBOXSERVICE_ARG1_UTF8_ARGV
1132	/* Insert --utf8-argv as the first argument if executing the VBoxService binary. */
1133	if (fExecutingSelf)
1134	{
1135	rc = RTStrDupEx(&papszNewArgv[iDst], VBOXSERVICE_ARG1_UTF8_ARGV);
1136	if (RT_SUCCESS(rc))
1137	iDst++;
1138	}
1139	#endif
1140	/* Copy over the other arguments. */
1141	if (RT_SUCCESS(rc))
1142	for (size_t iSrc = 0; iSrc < cArgs; iSrc++)
1143	{
1144	#if 0 /* Arguments expansion -- untested. */
1145	if (fFlags & GUEST_PROC_CREATE_FLAG_EXPAND_ARGUMENTS)
1146	{
1147	/** @todo r=bird: If you want this, we need a generic implementation, preferably in RTEnv or somewhere like that. The marking
1148	* up of the variables must be the same on all platforms. */
1149	/* According to MSDN the limit on older Windows version is 32K, whereas
1150	* Vista+ there are no limits anymore. We still stick to 4K. */
1151	char szExpanded[_4K];
1152	# ifdef RT_OS_WINDOWS
1153	if (!ExpandEnvironmentStrings(papszArgs[i], szExpanded, sizeof(szExpanded)))
1154	rc = RTErrConvertFromWin32(GetLastError());
1155	# else
1156	/* No expansion for non-Windows yet. */
1157	rc = RTStrCopy(papszArgs[i], sizeof(szExpanded), szExpanded);
1158	# endif
1159	if (RT_SUCCESS(rc))
1160	rc = RTStrDupEx(&pszArg, szExpanded);
1161	}
1162	else
1163	#endif
1164	rc = RTStrDupEx(&papszNewArgv[iDst], papszArgs[iSrc]);
1165	if (RT_SUCCESS(rc))
1166	iDst++;
1167	else
1168	break;
1169	}
1170
1171	if (RT_SUCCESS(rc))
1172	{
1173	/* Terminate array. */
1174	papszNewArgv[iDst] = NULL;
1175
1176	*ppapszArgv = papszNewArgv;
1177	return VINF_SUCCESS;
1178	}
1179
1180	/* Failed, bail out. */
1181	while (iDst-- > 0)
1182	RTStrFree(papszNewArgv[iDst]);
1183	}
1184	RTMemFree(papszNewArgv);
1185	return rc;
1186	}
1187
1188
1189	/**
1190	* Assigns a valid PID to a guest control thread and also checks if there already was
1191	* another (stale) guest process which was using that PID before and destroys it.
1192	*
1193	* @return IPRT status code.
1194	* @param pProcess Process to assign PID to.
1195	* @param uPID PID to assign to the specified guest control execution thread.
1196	*/
1197	static int vgsvcGstCtrlProcessAssignPID(PVBOXSERVICECTRLPROCESS pProcess, uint32_t uPID)
1198	{
1199	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
1200	AssertReturn(uPID, VERR_INVALID_PARAMETER);
1201
1202	AssertPtr(pProcess->pSession);
1203	int rc = RTCritSectEnter(&pProcess->pSession->CritSect);
1204	if (RT_SUCCESS(rc))
1205	{
1206	/* Search old threads using the desired PID and shut them down completely -- it's
1207	* not used anymore. */
1208	bool fTryAgain;
1209	do
1210	{
1211	fTryAgain = false;
1212	PVBOXSERVICECTRLPROCESS pProcessCur;
1213	RTListForEach(&pProcess->pSession->lstProcesses, pProcessCur, VBOXSERVICECTRLPROCESS, Node)
1214	{
1215	if (pProcessCur->uPID == uPID)
1216	{
1217	Assert(pProcessCur != pProcess); /* can't happen */
1218	uint32_t uTriedPID = uPID;
1219	uPID += 391939;
1220	VGSvcVerbose(2, "PID %RU32 was used before (process %p), trying again with %RU32 ...\n",
1221	uTriedPID, pProcessCur, uPID);
1222	fTryAgain = true;
1223	break;
1224	}
1225	}
1226	} while (fTryAgain);
1227
1228	/* Assign PID to current thread. */
1229	pProcess->uPID = uPID;
1230
1231	rc = RTCritSectLeave(&pProcess->pSession->CritSect);
1232	AssertRC(rc);
1233	}
1234
1235	return rc;
1236	}
1237
1238
1239	static void vgsvcGstCtrlProcessFreeArgv(char **papszArgv)
1240	{
1241	if (papszArgv)
1242	{
1243	size_t i = 0;
1244	while (papszArgv[i])
1245	RTStrFree(papszArgv[i++]);
1246	RTMemFree(papszArgv);
1247	}
1248	}
1249
1250
1251	/**
1252	* Helper function to create/start a process on the guest.
1253	*
1254	* @return IPRT status code.
1255	* @param pszExec Full qualified path of process to start (without arguments).
1256	* @param papszArgs Pointer to array of command line arguments.
1257	* @param hEnv Handle to environment block to use.
1258	* @param fFlags Process execution flags.
1259	* @param phStdIn Handle for the process' stdin pipe.
1260	* @param phStdOut Handle for the process' stdout pipe.
1261	* @param phStdErr Handle for the process' stderr pipe.
1262	* @param pszAsUser User name (account) to start the process under.
1263	* @param pszPassword Password of the specified user.
1264	* @param pszDomain Domain to use for authentication.
1265	* @param pszCwd Current working directory to use for the created process.
1266	* Set to NULL if not being used.
1267	* @param phProcess Pointer which will receive the process handle after
1268	* successful process start.
1269	*/
1270	static int vgsvcGstCtrlProcessCreateProcess(const char pszExec, const char const *papszArgs, RTENV hEnv, uint32_t fFlags,
1271	PCRTHANDLE phStdIn, PCRTHANDLE phStdOut, PCRTHANDLE phStdErr,
1272	const char pszAsUser, const char pszPassword, const char *pszDomain,
1273	const char *pszCwd, PRTPROCESS phProcess)
1274	{
1275	#ifndef RT_OS_WINDOWS
1276	RT_NOREF1(pszDomain);
1277	#endif
1278	AssertPtrReturn(pszExec, VERR_INVALID_PARAMETER);
1279	AssertPtrReturn(papszArgs, VERR_INVALID_PARAMETER);
1280	/* phStdIn is optional. */
1281	/* phStdOut is optional. */
1282	/* phStdErr is optional. */
1283	/* pszPassword is optional. */
1284	/* pszDomain is optional. */
1285	/* pszCwd is optional. */
1286	AssertPtrReturn(phProcess, VERR_INVALID_PARAMETER);
1287
1288	int rc = VINF_SUCCESS;
1289	char szExecExp[RTPATH_MAX];
1290
1291	#ifdef DEBUG
1292	/* Never log this in release mode! */
1293	VGSvcVerbose(4, "pszUser=%s, pszPassword=%s, pszDomain=%s\n", pszAsUser, pszPassword, pszDomain);
1294	#endif
1295
1296	#ifdef RT_OS_WINDOWS
1297	/*
1298	* If sysprep should be executed do this in the context of VBoxService, which
1299	* (usually, if started by SCM) has administrator rights. Because of that a UI
1300	* won't be shown (doesn't have a desktop).
1301	*/
1302	if (!RTStrICmp(pszExec, "sysprep"))
1303	{
1304	/* Use a predefined sysprep path as default. */
1305	char szSysprepCmd[RTPATH_MAX] = "C:\\sysprep\\sysprep.exe";
1306	/** @todo Check digital signature of file above before executing it? */
1307
1308	/*
1309	* On Windows Vista (and up) sysprep is located in "system32\\Sysprep\\sysprep.exe",
1310	* so detect the OS and use a different path.
1311	*/
1312	if (RTSystemGetNtVersion() >= RTSYSTEM_MAKE_NT_VERSION(6,0,0) /* Vista and later */)
1313	{
1314	rc = RTEnvGetEx(RTENV_DEFAULT, "windir", szSysprepCmd, sizeof(szSysprepCmd), NULL);
1315	#ifndef RT_ARCH_AMD64
1316	/* Don't execute 64-bit sysprep from a 32-bit service host! */
1317	char szSysWow64[RTPATH_MAX];
1318	if (RTStrPrintf(szSysWow64, sizeof(szSysWow64), "%s", szSysprepCmd))
1319	{
1320	rc = RTPathAppend(szSysWow64, sizeof(szSysWow64), "SysWow64");
1321	AssertRC(rc);
1322	}
1323	if ( RT_SUCCESS(rc)
1324	&& RTPathExists(szSysWow64))
1325	VGSvcVerbose(0, "Warning: This service is 32-bit; could not execute sysprep on 64-bit OS!\n");
1326	#endif
1327	if (RT_SUCCESS(rc))
1328	rc = RTPathAppend(szSysprepCmd, sizeof(szSysprepCmd), "system32\\Sysprep\\sysprep.exe");
1329	if (RT_SUCCESS(rc))
1330	RTPathChangeToDosSlashes(szSysprepCmd, false /* No forcing necessary */);
1331
1332	if (RT_FAILURE(rc))
1333	VGSvcError("Failed to detect sysrep location, rc=%Rrc\n", rc);
1334	}
1335
1336	VGSvcVerbose(3, "Sysprep executable is: %s\n", szSysprepCmd);
1337
1338	if (RT_SUCCESS(rc))
1339	{
1340	char **papszArgsExp;
1341	rc = vgsvcGstCtrlProcessAllocateArgv(szSysprepCmd /* argv0 */, papszArgs, fFlags,
1342	false /fExecutingSelf/, &papszArgsExp);
1343	if (RT_SUCCESS(rc))
1344	{
1345	/* As we don't specify credentials for the sysprep process, it will
1346	* run under behalf of the account VBoxService was started under, most
1347	* likely local system. */
1348	rc = RTProcCreateEx(szSysprepCmd, papszArgsExp, hEnv, 0 /* fFlags */,
1349	phStdIn, phStdOut, phStdErr, NULL /* pszAsUser */,
1350	NULL /* pszPassword */, NULL, phProcess);
1351	vgsvcGstCtrlProcessFreeArgv(papszArgsExp);
1352	}
1353	}
1354
1355	if (RT_FAILURE(rc))
1356	VGSvcVerbose(3, "Starting sysprep returned rc=%Rrc\n", rc);
1357
1358	return rc;
1359	}
1360	#endif /* RT_OS_WINDOWS */
1361
1362	bool fExecutingSelf = false;
1363	#ifdef VBOX_WITH_VBOXSERVICE_TOOLBOX
1364	/* The "vbox_" prefix is reserved for the toolbox (vbox_cat, vbox_mkdir,
1365	et al.) and we will replace pszExec with the full VBoxService path instead. */
1366	if (RTStrStartsWith(pszExec, "vbox_"))
1367	{
1368	fExecutingSelf = true;
1369	rc = vgsvcGstCtrlProcessResolveExecutable(VBOXSERVICE_NAME, szExecExp, sizeof(szExecExp));
1370	}
1371	else
1372	{
1373	#endif
1374	/*
1375	* Do the environment variables expansion on executable and arguments.
1376	*/
1377	rc = vgsvcGstCtrlProcessResolveExecutable(pszExec, szExecExp, sizeof(szExecExp));
1378	#ifdef VBOX_WITH_VBOXSERVICE_TOOLBOX
1379	}
1380	#endif
1381	if (RT_SUCCESS(rc))
1382	{
1383	/*
1384	* This one is a bit tricky to also support older hosts:
1385	*
1386	* - If the host does not provide a dedicated argv[0] (< VBox 6.1.x), we use the
1387	* unmodified executable name (pszExec) as the (default) argv[0]. This is wrong, but we can't do
1388	* much about it. The rest (argv[1,2,n]) then gets set starting at papszArgs[0].
1389	*
1390	* - Newer hosts (>= VBox 6.1.x) provide a correct argv[0] independently of the actual
1391	* executable name though, so actually use argv[0] and argv[1,2,n] as intended.
1392	*/
1393	const bool fHasArgv0 = RT_BOOL(g_fControlHostFeatures0 & VBOX_GUESTCTRL_HF_0_PROCESS_ARGV0);
1394
1395	const char *pcszArgv0 = (fHasArgv0 && papszArgs[0]) ? papszArgs[0] : pszExec;
1396	AssertPtrReturn(pcszArgv0, VERR_INVALID_POINTER); /* Paranoia. */
1397
1398	const uint32_t uArgvIdx = pcszArgv0 == papszArgs[0] ? 1 : 0;
1399
1400	VGSvcVerbose(3, "vgsvcGstCtrlProcessCreateProcess: fHasArgv0=%RTbool, pcszArgv0=%p, uArgvIdx=%RU32, "
1401	"g_fControlHostFeatures0=%#x\n",
1402	fHasArgv0, pcszArgv0, uArgvIdx, g_fControlHostFeatures0);
1403
1404	char **papszArgsExp;
1405	rc = vgsvcGstCtrlProcessAllocateArgv(pcszArgv0, &papszArgs[uArgvIdx], fFlags, fExecutingSelf, &papszArgsExp);
1406	if (RT_FAILURE(rc))
1407	{
1408	/* Don't print any arguments -- may contain passwords or other sensible data! */
1409	VGSvcError("Could not prepare arguments, rc=%Rrc\n", rc);
1410	}
1411	else
1412	{
1413	uint32_t fProcCreateFlags = 0;
1414	if (fExecutingSelf)
1415	fProcCreateFlags \|= VBOXSERVICE_PROC_F_UTF8_ARGV;
1416	if (fFlags)
1417	{
1418	if (fFlags & GUEST_PROC_CREATE_FLAG_HIDDEN)
1419	fProcCreateFlags \|= RTPROC_FLAGS_HIDDEN;
1420	if (fFlags & GUEST_PROC_CREATE_FLAG_PROFILE)
1421	fProcCreateFlags \|= RTPROC_FLAGS_PROFILE;
1422	if (fFlags & GUEST_PROC_CREATE_FLAG_UNQUOTED_ARGS)
1423	fProcCreateFlags \|= RTPROC_FLAGS_UNQUOTED_ARGS;
1424	}
1425	if (pszCwd && *pszCwd)
1426	fProcCreateFlags \|= RTPROC_FLAGS_CWD;
1427	else
1428	pszCwd = NULL;
1429
1430	/* If no user name specified run with current credentials (e.g.
1431	* full service/system rights). This is prohibited via official Main API!
1432	*
1433	* Otherwise use the RTPROC_FLAGS_SERVICE to use some special authentication
1434	* code (at least on Windows) for running processes as different users
1435	* started from our system service. */
1436	if (pszAsUser && *pszAsUser)
1437	fProcCreateFlags \|= RTPROC_FLAGS_SERVICE;
1438	#ifdef DEBUG
1439	VGSvcVerbose(3, "Command: %s\n", szExecExp);
1440	for (size_t i = 0; papszArgsExp[i]; i++)
1441	VGSvcVerbose(3, " argv[%zu]: %s\n", i, papszArgsExp[i]);
1442	#endif
1443	VGSvcVerbose(3, "Starting process '%s' ...\n", szExecExp);
1444
1445	#ifdef RT_OS_WINDOWS
1446	/* If a domain name is given, construct an UPN (User Principle Name) with
1447	* the domain name built-in, e.g. "joedoe@example.com". */
1448	char *pszUserUPN = NULL;
1449	if (pszDomain && *pszDomain != '\0')
1450	{
1451	pszAsUser = pszUserUPN = RTStrAPrintf2("%s@%s", pszAsUser, pszDomain);
1452	if (pszAsUser)
1453	VGSvcVerbose(3, "Using UPN: %s\n", pszAsUser);
1454	else
1455	rc = VERR_NO_STR_MEMORY;
1456	}
1457	if (RT_SUCCESS(rc))
1458	#endif
1459	{
1460	/* Do normal execution. */
1461	rc = RTProcCreateEx(szExecExp, papszArgsExp, hEnv, fProcCreateFlags,
1462	phStdIn, phStdOut, phStdErr,
1463	pszAsUser,
1464	pszPassword && *pszPassword ? pszPassword : NULL,
1465	(void )pszCwd /pvExtraData*/,
1466	phProcess);
1467
1468	#ifdef RT_OS_WINDOWS
1469	RTStrFree(pszUserUPN);
1470	#endif
1471	VGSvcVerbose(3, "Starting process '%s' returned rc=%Rrc\n", szExecExp, rc);
1472	}
1473	vgsvcGstCtrlProcessFreeArgv(papszArgsExp);
1474	}
1475	}
1476	return rc;
1477	}
1478
1479
1480	#ifdef DEBUG
1481	/**
1482	* Dumps content to a file in the OS temporary directory.
1483	*
1484	* @returns VBox status code.
1485	* @param pvBuf Buffer of content to dump.
1486	* @param cbBuf Size (in bytes) of content to dump.
1487	* @param pszFileNmFmt Pointer to the file name format string, @see pg_rt_str_format.
1488	* @param ... The format argument.
1489	*/
1490	static int vgsvcGstCtrlProcessDbgDumpToFileF(const void pvBuf, size_t cbBuf, const char pszFileNmFmt, ...)
1491	{
1492	AssertPtrReturn(pszFileNmFmt, VERR_INVALID_POINTER);
1493	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
1494
1495	if (!cbBuf)
1496	return VINF_SUCCESS;
1497
1498	va_list va;
1499	va_start(va, pszFileNmFmt);
1500
1501	char *pszFileName = NULL;
1502	const int cchFileName = RTStrAPrintfV(&pszFileName, pszFileNmFmt, va);
1503
1504	va_end(va);
1505
1506	if (!cchFileName)
1507	return VERR_NO_MEMORY;
1508
1509	char szPathFileAbs[RTPATH_MAX];
1510	int rc = RTPathTemp(szPathFileAbs, sizeof(szPathFileAbs));
1511	if (RT_SUCCESS(rc))
1512	rc = RTPathAppend(szPathFileAbs, sizeof(szPathFileAbs), pszFileName);
1513
1514	RTStrFree(pszFileName);
1515
1516	if (RT_SUCCESS(rc))
1517	{
1518	VGSvcVerbose(4, "Dumping %zu bytes to '%s'\n", cbBuf, szPathFileAbs);
1519
1520	RTFILE fh;
1521	rc = RTFileOpen(&fh, szPathFileAbs, RTFILE_O_OPEN_CREATE \| RTFILE_O_WRITE \| RTFILE_O_DENY_WRITE);
1522	if (RT_SUCCESS(rc))
1523	{
1524	rc = RTFileWrite(fh, pvBuf, cbBuf, NULL /* pcbWritten */);
1525	RTFileClose(fh);
1526	}
1527	}
1528
1529	return rc;
1530	}
1531	#endif /* DEBUG */
1532
1533
1534	/**
1535	* The actual worker routine (loop) for a started guest process.
1536	*
1537	* @return IPRT status code.
1538	* @param pProcess The process we're servicing and monitoring.
1539	*/
1540	static int vgsvcGstCtrlProcessProcessWorker(PVBOXSERVICECTRLPROCESS pProcess)
1541	{
1542	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
1543	VGSvcVerbose(3, "Thread of process pThread=0x%p = '%s' started\n", pProcess, pProcess->pStartupInfo->pszCmd);
1544
1545	VGSvcVerbose(3, "Guest process '%s', flags=0x%x\n", pProcess->pStartupInfo->pszCmd, pProcess->pStartupInfo->fFlags);
1546
1547	int rc = VGSvcGstCtrlSessionProcessAdd(pProcess->pSession, pProcess);
1548	if (RT_FAILURE(rc))
1549	{
1550	VGSvcError("Error while adding guest process '%s' (%p) to session process list, rc=%Rrc\n",
1551	pProcess->pStartupInfo->pszCmd, pProcess, rc);
1552	RTThreadUserSignal(RTThreadSelf());
1553	return rc;
1554	}
1555
1556	bool fSignalled = false; /* Indicator whether we signalled the thread user event already. */
1557
1558	/*
1559	* Prepare argument list.
1560	*/
1561	VGSvcVerbose(3, "vgsvcGstCtrlProcessProcessWorker: fHostFeatures0 = %#x\n", g_fControlHostFeatures0);
1562	VGSvcVerbose(3, "vgsvcGstCtrlProcessProcessWorker: StartupInfo.szCmd = '%s'\n", pProcess->pStartupInfo->pszCmd);
1563	VGSvcVerbose(3, "vgsvcGstCtrlProcessProcessWorker: StartupInfo.szCwd = '%s'\n", pProcess->pStartupInfo->pszCwd
1564	? pProcess->pStartupInfo->pszCwd : "<None>");
1565	VGSvcVerbose(3, "vgsvcGstCtrlProcessProcessWorker: StartupInfo.uNumArgs = '%RU32'\n", pProcess->pStartupInfo->cArgs);
1566	#ifdef DEBUG /* Never log this stuff in release mode! */
1567	VGSvcVerbose(3, "vgsvcGstCtrlProcessProcessWorker: StartupInfo.szArgs = '%s'\n", pProcess->pStartupInfo->pszArgs);
1568	#endif
1569
1570	char **papszArgs;
1571	int cArgs = 0; /* Initialize in case of RTGetOptArgvFromString() is failing ... */
1572	rc = RTGetOptArgvFromString(&papszArgs, &cArgs,
1573	pProcess->pStartupInfo->cArgs > 0 ? pProcess->pStartupInfo->pszArgs : "",
1574	RTGETOPTARGV_CNV_QUOTE_BOURNE_SH, NULL);
1575
1576	VGSvcVerbose(3, "vgsvcGstCtrlProcessProcessWorker: cArgs = %d\n", cArgs);
1577	#ifdef VBOX_STRICT
1578	for (int i = 0; i < cArgs; i++)
1579	VGSvcVerbose(3, "vgsvcGstCtrlProcessProcessWorker: papszArgs[%d] = '%s'\n", i, papszArgs[i] ? papszArgs[i] : "<NULL>");
1580
1581	const bool fHasArgv0 = RT_BOOL(g_fControlHostFeatures0 & VBOX_GUESTCTRL_HF_0_PROCESS_ARGV0); RT_NOREF(fHasArgv0);
1582	const int cArgsToCheck = cArgs + (fHasArgv0 ? 0 : 1);
1583
1584	/* Did we get the same result?
1585	* Take into account that we might not have supplied a (correct) argv[0] from the host. */
1586	AssertMsg((int)pProcess->pStartupInfo->cArgs == cArgsToCheck,
1587	("rc=%Rrc, StartupInfo.uNumArgs=%RU32 != cArgsToCheck=%d, cArgs=%d, fHostFeatures0=%#x\n",
1588	rc, pProcess->pStartupInfo->cArgs, cArgsToCheck, cArgs, g_fControlHostFeatures0));
1589	#endif
1590
1591	/*
1592	* Create the environment.
1593	*/
1594	uint32_t const cbEnv = pProcess->pStartupInfo->cbEnv;
1595	if (RT_SUCCESS(rc))
1596	AssertStmt( cbEnv <= GUEST_PROC_MAX_ENV_LEN
1597	\|\| pProcess->pStartupInfo->cEnvVars == 0,
1598	rc = VERR_INVALID_PARAMETER);
1599	if (RT_SUCCESS(rc))
1600	{
1601	RTENV hEnv;
1602	rc = RTEnvClone(&hEnv, RTENV_DEFAULT);
1603	if (RT_SUCCESS(rc))
1604	{
1605	VGSvcVerbose(3, "Additional environment variables: %RU32 (%RU32 bytes)\n",
1606	pProcess->pStartupInfo->cEnvVars, cbEnv);
1607
1608	if ( pProcess->pStartupInfo->cEnvVars
1609	&& cbEnv > 0)
1610	{
1611	size_t offCur = 0;
1612	while (offCur < cbEnv)
1613	{
1614	const char * const pszCur = &pProcess->pStartupInfo->pszEnv[offCur];
1615	size_t const cchCur = RTStrNLen(pszCur, cbEnv - offCur);
1616	AssertBreakStmt(cchCur < cbEnv - offCur, rc = VERR_INVALID_PARAMETER);
1617	VGSvcVerbose(3, "Setting environment variable: '%s'\n", pszCur);
1618	rc = RTEnvPutEx(hEnv, pszCur);
1619	if (RT_SUCCESS(rc))
1620	offCur += cchCur + 1;
1621	else
1622	{
1623	VGSvcError("Setting environment variable '%s' failed: %Rrc\n", pszCur, rc);
1624	break;
1625	}
1626	}
1627	}
1628
1629	if (RT_SUCCESS(rc))
1630	{
1631	/*
1632	* Setup the redirection of the standard stuff.
1633	*/
1634	/** @todo consider supporting: gcc stuff.c >file 2>&1. */
1635	RTHANDLE hStdIn;
1636	PRTHANDLE phStdIn;
1637	rc = vgsvcGstCtrlProcessSetupPipe("\|", 0 /STDIN_FILENO/,
1638	&hStdIn, &phStdIn, &pProcess->hPipeStdInW);
1639	if (RT_SUCCESS(rc))
1640	{
1641	RTHANDLE hStdOut;
1642	PRTHANDLE phStdOut;
1643	rc = vgsvcGstCtrlProcessSetupPipe( (pProcess->pStartupInfo->fFlags & GUEST_PROC_CREATE_FLAG_WAIT_STDOUT)
1644	? "\|" : "/dev/null",
1645	1 /STDOUT_FILENO/,
1646	&hStdOut, &phStdOut, &pProcess->hPipeStdOutR);
1647	if (RT_SUCCESS(rc))
1648	{
1649	RTHANDLE hStdErr;
1650	PRTHANDLE phStdErr;
1651	rc = vgsvcGstCtrlProcessSetupPipe( (pProcess->pStartupInfo->fFlags & GUEST_PROC_CREATE_FLAG_WAIT_STDERR)
1652	? "\|" : "/dev/null",
1653	2 /STDERR_FILENO/,
1654	&hStdErr, &phStdErr, &pProcess->hPipeStdErrR);
1655	if (RT_SUCCESS(rc))
1656	{
1657	/*
1658	* Create a poll set for the pipes and let the
1659	* transport layer add stuff to it as well.
1660	*/
1661	rc = RTPollSetCreate(&pProcess->hPollSet);
1662	if (RT_SUCCESS(rc))
1663	{
1664	uint32_t uFlags = RTPOLL_EVT_ERROR;
1665	#if 0
1666	/* Add reading event to pollset to get some more information. */
1667	uFlags \|= RTPOLL_EVT_READ;
1668	#endif
1669	/* Stdin. */
1670	if (RT_SUCCESS(rc))
1671	rc = RTPollSetAddPipe(pProcess->hPollSet,
1672	pProcess->hPipeStdInW, RTPOLL_EVT_ERROR, VBOXSERVICECTRLPIPEID_STDIN);
1673	/* Stdout. */
1674	if (RT_SUCCESS(rc))
1675	rc = RTPollSetAddPipe(pProcess->hPollSet,
1676	pProcess->hPipeStdOutR, uFlags, VBOXSERVICECTRLPIPEID_STDOUT);
1677	/* Stderr. */
1678	if (RT_SUCCESS(rc))
1679	rc = RTPollSetAddPipe(pProcess->hPollSet,
1680	pProcess->hPipeStdErrR, uFlags, VBOXSERVICECTRLPIPEID_STDERR);
1681	/* IPC notification pipe. */
1682	if (RT_SUCCESS(rc))
1683	rc = RTPipeCreate(&pProcess->hNotificationPipeR, &pProcess->hNotificationPipeW, 0 /* Flags */);
1684	if (RT_SUCCESS(rc))
1685	rc = RTPollSetAddPipe(pProcess->hPollSet,
1686	pProcess->hNotificationPipeR, RTPOLL_EVT_READ, VBOXSERVICECTRLPIPEID_IPC_NOTIFY);
1687	if (RT_SUCCESS(rc))
1688	{
1689	AssertPtr(pProcess->pSession);
1690	bool fNeedsImpersonation = !(pProcess->pSession->fFlags & VBOXSERVICECTRLSESSION_FLAG_SPAWN);
1691
1692	rc = vgsvcGstCtrlProcessCreateProcess(pProcess->pStartupInfo->pszCmd, papszArgs, hEnv,
1693	pProcess->pStartupInfo->fFlags,
1694	phStdIn, phStdOut, phStdErr,
1695	fNeedsImpersonation ? pProcess->pStartupInfo->pszUser : NULL,
1696	fNeedsImpersonation ? pProcess->pStartupInfo->pszPassword : NULL,
1697	fNeedsImpersonation ? pProcess->pStartupInfo->pszDomain : NULL,
1698	pProcess->pStartupInfo->pszCwd, &pProcess->hProcess);
1699	if (RT_FAILURE(rc))
1700	VGSvcError("Error starting process, rc=%Rrc\n", rc);
1701	/*
1702	* Tell the session thread that it can continue
1703	* spawning guest processes. This needs to be done after the new
1704	* process has been started because otherwise signal handling
1705	* on (Open) Solaris does not work correctly (see @bugref{5068}).
1706	*/
1707	int rc2 = RTThreadUserSignal(RTThreadSelf());
1708	if (RT_SUCCESS(rc))
1709	rc = rc2;
1710	fSignalled = true;
1711
1712	if (RT_SUCCESS(rc))
1713	{
1714	/*
1715	* Close the child ends of any pipes and redirected files.
1716	*/
1717	rc2 = RTHandleClose(phStdIn); AssertRC(rc2);
1718	phStdIn = NULL;
1719	rc2 = RTHandleClose(phStdOut); AssertRC(rc2);
1720	phStdOut = NULL;
1721	rc2 = RTHandleClose(phStdErr); AssertRC(rc2);
1722	phStdErr = NULL;
1723
1724	/* Enter the process main loop. */
1725	rc = vgsvcGstCtrlProcessProcLoop(pProcess);
1726
1727	/*
1728	* The handles that are no longer in the set have
1729	* been closed by the above call in order to prevent
1730	* the guest from getting stuck accessing them.
1731	* So, NIL the handles to avoid closing them again.
1732	*/
1733	if (RT_FAILURE(RTPollSetQueryHandle(pProcess->hPollSet,
1734	VBOXSERVICECTRLPIPEID_IPC_NOTIFY, NULL)))
1735	pProcess->hNotificationPipeW = NIL_RTPIPE;
1736	if (RT_FAILURE(RTPollSetQueryHandle(pProcess->hPollSet,
1737	VBOXSERVICECTRLPIPEID_STDERR, NULL)))
1738	pProcess->hPipeStdErrR = NIL_RTPIPE;
1739	if (RT_FAILURE(RTPollSetQueryHandle(pProcess->hPollSet,
1740	VBOXSERVICECTRLPIPEID_STDOUT, NULL)))
1741	pProcess->hPipeStdOutR = NIL_RTPIPE;
1742	if (RT_FAILURE(RTPollSetQueryHandle(pProcess->hPollSet,
1743	VBOXSERVICECTRLPIPEID_STDIN, NULL)))
1744	pProcess->hPipeStdInW = NIL_RTPIPE;
1745	}
1746	}
1747	RTPollSetDestroy(pProcess->hPollSet);
1748	pProcess->hPollSet = NIL_RTPOLLSET;
1749
1750	RTPipeClose(pProcess->hNotificationPipeR);
1751	pProcess->hNotificationPipeR = NIL_RTPIPE;
1752	RTPipeClose(pProcess->hNotificationPipeW);
1753	pProcess->hNotificationPipeW = NIL_RTPIPE;
1754	}
1755	RTPipeClose(pProcess->hPipeStdErrR);
1756	pProcess->hPipeStdErrR = NIL_RTPIPE;
1757	RTHandleClose(&hStdErr);
1758	if (phStdErr)
1759	RTHandleClose(phStdErr);
1760	}
1761	RTPipeClose(pProcess->hPipeStdOutR);
1762	pProcess->hPipeStdOutR = NIL_RTPIPE;
1763	RTHandleClose(&hStdOut);
1764	if (phStdOut)
1765	RTHandleClose(phStdOut);
1766	}
1767	RTPipeClose(pProcess->hPipeStdInW);
1768	pProcess->hPipeStdInW = NIL_RTPIPE;
1769	RTHandleClose(&hStdIn);
1770	if (phStdIn)
1771	RTHandleClose(phStdIn);
1772	}
1773	}
1774	RTEnvDestroy(hEnv);
1775	}
1776	}
1777
1778	if (RT_FAILURE(rc))
1779	{
1780	VBGLR3GUESTCTRLCMDCTX ctx = { g_idControlSvcClient, pProcess->uContextID, 0 /* uProtocol /, 0 / uNumParms */ };
1781	int rc2 = VbglR3GuestCtrlProcCbStatus(&ctx,
1782	pProcess->uPID, PROC_STS_ERROR, rc,
1783	NULL /* pvData /, 0 / cbData */);
1784	if ( RT_FAILURE(rc2)
1785	&& rc2 != VERR_NOT_FOUND)
1786	VGSvcError("[PID %RU32]: Could not report process failure error; rc=%Rrc (process error %Rrc)\n",
1787	pProcess->uPID, rc2, rc);
1788	}
1789
1790	/* Update stopped status. */
1791	ASMAtomicWriteBool(&pProcess->fStopped, true);
1792
1793	if (cArgs)
1794	RTGetOptArgvFree(papszArgs);
1795
1796	/*
1797	* If something went wrong signal the user event so that others don't wait
1798	* forever on this thread.
1799	*/
1800	if ( RT_FAILURE(rc)
1801	&& !fSignalled)
1802	{
1803	RTThreadUserSignal(RTThreadSelf());
1804	}
1805
1806	/* Set shut down flag in case we've forgotten it. */
1807	ASMAtomicWriteBool(&pProcess->fShutdown, true);
1808
1809	VGSvcVerbose(3, "[PID %RU32]: Thread of process '%s' ended with rc=%Rrc (fSignalled=%RTbool)\n",
1810	pProcess->uPID, pProcess->pStartupInfo->pszCmd, rc, fSignalled);
1811
1812	return rc;
1813	}
1814
1815
1816	static int vgsvcGstCtrlProcessLock(PVBOXSERVICECTRLPROCESS pProcess)
1817	{
1818	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
1819	int rc = RTCritSectEnter(&pProcess->CritSect);
1820	AssertRC(rc);
1821	return rc;
1822	}
1823
1824
1825	/**
1826	* Thread main routine for a started process.
1827	*
1828	* @return IPRT status code.
1829	* @param hThreadSelf The thread handle.
1830	* @param pvUser Pointer to a VBOXSERVICECTRLPROCESS structure.
1831	*
1832	*/
1833	static DECLCALLBACK(int) vgsvcGstCtrlProcessThread(RTTHREAD hThreadSelf, void *pvUser)
1834	{
1835	RT_NOREF1(hThreadSelf);
1836	PVBOXSERVICECTRLPROCESS pProcess = (PVBOXSERVICECTRLPROCESS)pvUser;
1837	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
1838	return vgsvcGstCtrlProcessProcessWorker(pProcess);
1839	}
1840
1841
1842	static int vgsvcGstCtrlProcessUnlock(PVBOXSERVICECTRLPROCESS pProcess)
1843	{
1844	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
1845	int rc = RTCritSectLeave(&pProcess->CritSect);
1846	AssertRC(rc);
1847	return rc;
1848	}
1849
1850
1851	/**
1852	* Executes (starts) a process on the guest. This causes a new thread to be created
1853	* so that this function will not block the overall program execution.
1854	*
1855	* @return IPRT status code.
1856	* @param pSession Guest session.
1857	* @param pStartupInfo Startup info.
1858	* @param uContextID Context ID to associate the process to start with.
1859	*/
1860	int VGSvcGstCtrlProcessStart(const PVBOXSERVICECTRLSESSION pSession,
1861	const PVBGLR3GUESTCTRLPROCSTARTUPINFO pStartupInfo, uint32_t uContextID)
1862	{
1863	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
1864	AssertPtrReturn(pStartupInfo, VERR_INVALID_POINTER);
1865
1866	/*
1867	* Allocate new thread data and assign it to our thread list.
1868	*/
1869	PVBOXSERVICECTRLPROCESS pProcess = (PVBOXSERVICECTRLPROCESS)RTMemAlloc(sizeof(VBOXSERVICECTRLPROCESS));
1870	if (!pProcess)
1871	return VERR_NO_MEMORY;
1872
1873	int rc = vgsvcGstCtrlProcessInit(pProcess, pSession, pStartupInfo, uContextID);
1874	if (RT_SUCCESS(rc))
1875	{
1876	static uint32_t s_uCtrlExecThread = 0;
1877	rc = RTThreadCreateF(&pProcess->Thread, vgsvcGstCtrlProcessThread,
1878	pProcess /pvUser/, 0 /cbStack/,
1879	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "gctl%RU32", s_uCtrlExecThread++);
1880	if (RT_FAILURE(rc))
1881	{
1882	VGSvcError("Creating thread for guest process '%s' failed: rc=%Rrc, pProcess=%p\n",
1883	pStartupInfo->pszCmd, rc, pProcess);
1884
1885	/* Process has not been added to the session's process list yet, so skip VGSvcGstCtrlSessionProcessRemove() here. */
1886	VGSvcGstCtrlProcessFree(pProcess);
1887	}
1888	else
1889	{
1890	VGSvcVerbose(4, "Waiting for thread to initialize ...\n");
1891
1892	/* Wait for the thread to initialize. */
1893	rc = RTThreadUserWait(pProcess->Thread, 60 * 1000 /* 60 seconds max. */);
1894	AssertRC(rc);
1895	if ( ASMAtomicReadBool(&pProcess->fShutdown)
1896	\|\| ASMAtomicReadBool(&pProcess->fStopped)
1897	\|\| RT_FAILURE(rc))
1898	{
1899	VGSvcError("Thread for process '%s' failed to start, rc=%Rrc\n", pStartupInfo->pszCmd, rc);
1900	int rc2 = RTThreadWait(pProcess->Thread, RT_MS_1SEC * 30, NULL);
1901	if (RT_SUCCESS(rc2))
1902	pProcess->Thread = NIL_RTTHREAD;
1903
1904	VGSvcGstCtrlSessionProcessRemove(pSession, pProcess);
1905	VGSvcGstCtrlProcessFree(pProcess);
1906	}
1907	else
1908	{
1909	ASMAtomicXchgBool(&pProcess->fStarted, true);
1910	}
1911	}
1912	}
1913
1914	return rc;
1915	}
1916
1917
1918	static DECLCALLBACK(int) vgsvcGstCtrlProcessOnInput(PVBOXSERVICECTRLPROCESS pThis,
1919	const PVBGLR3GUESTCTRLCMDCTX pHostCtx,
1920	bool fPendingClose, void *pvBuf, uint32_t cbBuf)
1921	{
1922	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1923	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
1924
1925	int rc;
1926
1927	size_t cbWritten = 0;
1928	if (pvBuf && cbBuf)
1929	{
1930	if (pThis->hPipeStdInW != NIL_RTPIPE)
1931	rc = RTPipeWrite(pThis->hPipeStdInW, pvBuf, cbBuf, &cbWritten);
1932	else
1933	rc = VINF_EOF;
1934	}
1935	else
1936	rc = VERR_INVALID_PARAMETER;
1937
1938	/*
1939	* If this is the last write + we have really have written all data
1940	* we need to close the stdin pipe on our end and remove it from
1941	* the poll set.
1942	*/
1943	if ( fPendingClose
1944	&& cbBuf == cbWritten)
1945	{
1946	int rc2 = vgsvcGstCtrlProcessPollsetCloseInput(pThis, &pThis->hPipeStdInW);
1947	if (RT_SUCCESS(rc))
1948	rc = rc2;
1949	}
1950
1951	uint32_t uStatus = INPUT_STS_UNDEFINED; /* Status to send back to the host. */
1952	uint32_t fFlags = 0; /* No flags at the moment. */
1953	if (RT_SUCCESS(rc))
1954	{
1955	VGSvcVerbose(4, "[PID %RU32]: Written %RU32 bytes input, CID=%RU32, fPendingClose=%RTbool\n",
1956	pThis->uPID, cbWritten, pHostCtx->uContextID, fPendingClose);
1957	uStatus = INPUT_STS_WRITTEN;
1958	}
1959	else
1960	{
1961	if (rc == VERR_BAD_PIPE)
1962	uStatus = INPUT_STS_TERMINATED;
1963	else if (rc == VERR_BUFFER_OVERFLOW)
1964	uStatus = INPUT_STS_OVERFLOW;
1965	/* else undefined */
1966	}
1967
1968	/*
1969	* If there was an error and we did not set the host status
1970	* yet, then do it now.
1971	*/
1972	if ( RT_FAILURE(rc)
1973	&& uStatus == INPUT_STS_UNDEFINED)
1974	{
1975	uStatus = INPUT_STS_ERROR;
1976	fFlags = rc; /* funny thing to call a "flag"... */
1977	}
1978	Assert(uStatus > INPUT_STS_UNDEFINED);
1979
1980	int rc2 = VbglR3GuestCtrlProcCbStatusInput(pHostCtx, pThis->uPID, uStatus, fFlags, (uint32_t)cbWritten);
1981	if (RT_SUCCESS(rc))
1982	rc = rc2;
1983
1984	#ifdef DEBUG
1985	VGSvcVerbose(3, "[PID %RU32]: vgsvcGstCtrlProcessOnInput returned with rc=%Rrc\n", pThis->uPID, rc);
1986	#endif
1987	return rc;
1988	}
1989
1990
1991	static DECLCALLBACK(int) vgsvcGstCtrlProcessOnOutput(PVBOXSERVICECTRLPROCESS pThis,
1992	const PVBGLR3GUESTCTRLCMDCTX pHostCtx,
1993	uint32_t uHandle, uint32_t cbToRead, uint32_t fFlags)
1994	{
1995	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1996	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
1997
1998	const PVBOXSERVICECTRLSESSION pSession = pThis->pSession;
1999	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
2000
2001	int rc;
2002
2003	uint32_t cbBuf = cbToRead;
2004	uint8_t pvBuf = (uint8_t )RTMemAlloc(cbBuf);
2005	if (pvBuf)
2006	{
2007	PRTPIPE phPipe = uHandle == GUEST_PROC_OUT_H_STDOUT
2008	? &pThis->hPipeStdOutR
2009	: &pThis->hPipeStdErrR;
2010	AssertPtr(phPipe);
2011
2012	size_t cbRead = 0;
2013	if (*phPipe != NIL_RTPIPE)
2014	{
2015	rc = RTPipeRead(*phPipe, pvBuf, cbBuf, &cbRead);
2016	if (RT_FAILURE(rc))
2017	{
2018	RTPollSetRemove(pThis->hPollSet, uHandle == GUEST_PROC_OUT_H_STDERR
2019	? VBOXSERVICECTRLPIPEID_STDERR : VBOXSERVICECTRLPIPEID_STDOUT);
2020	RTPipeClose(*phPipe);
2021	*phPipe = NIL_RTPIPE;
2022	if (rc == VERR_BROKEN_PIPE)
2023	rc = VINF_EOF;
2024	}
2025	}
2026	else
2027	rc = VINF_EOF;
2028
2029	#ifdef DEBUG
2030	if (RT_SUCCESS(rc))
2031	{
2032	if ( pSession->fFlags & VBOXSERVICECTRLSESSION_FLAG_DUMPSTDOUT
2033	&& ( uHandle == GUEST_PROC_OUT_H_STDOUT
2034	\|\| uHandle == GUEST_PROC_OUT_H_STDOUT_DEPRECATED)
2035	)
2036	{
2037	rc = vgsvcGstCtrlProcessDbgDumpToFileF(pvBuf, cbRead, "VBoxService_Session%RU32_PID%RU32_StdOut.txt",
2038	pSession->StartupInfo.uSessionID, pThis->uPID);
2039	AssertRC(rc);
2040	}
2041	else if ( pSession->fFlags & VBOXSERVICECTRLSESSION_FLAG_DUMPSTDERR
2042	&& uHandle == GUEST_PROC_OUT_H_STDERR)
2043	{
2044	rc = vgsvcGstCtrlProcessDbgDumpToFileF(pvBuf, cbRead, "VBoxService_Session%RU32_PID%RU32_StdErr.txt",
2045	pSession->StartupInfo.uSessionID, pThis->uPID);
2046	AssertRC(rc);
2047	}
2048	}
2049	#endif
2050
2051	if (RT_SUCCESS(rc))
2052	{
2053	#ifdef DEBUG
2054	VGSvcVerbose(3, "[PID %RU32]: Read %RU32 bytes output: uHandle=%RU32, CID=%RU32, fFlags=%x\n",
2055	pThis->uPID, cbRead, uHandle, pHostCtx->uContextID, fFlags);
2056	#endif
2057	/** Note: Don't convert/touch/modify/whatever the output data here! This might be binary
2058	* data which the host needs to work with -- so just pass through all data unfiltered! */
2059
2060	/* Note: Since the context ID is unique the request has to be completed here,
2061	* regardless whether we got data or not! Otherwise the waiting events
2062	* on the host never will get completed! */
2063	Assert((uint32_t)cbRead == cbRead);
2064	rc = VbglR3GuestCtrlProcCbOutput(pHostCtx, pThis->uPID, uHandle, fFlags, pvBuf, (uint32_t)cbRead);
2065	if ( RT_FAILURE(rc)
2066	&& rc == VERR_NOT_FOUND) /* Not critical if guest PID is not found on the host (anymore). */
2067	rc = VINF_SUCCESS;
2068	}
2069
2070	RTMemFree(pvBuf);
2071	}
2072	else
2073	rc = VERR_NO_MEMORY;
2074
2075	#ifdef DEBUG
2076	VGSvcVerbose(3, "[PID %RU32]: Reading output returned with rc=%Rrc\n", pThis->uPID, rc);
2077	#endif
2078	return rc;
2079	}
2080
2081
2082	static DECLCALLBACK(int) vgsvcGstCtrlProcessOnTerm(PVBOXSERVICECTRLPROCESS pThis)
2083	{
2084	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
2085
2086	if (!ASMAtomicXchgBool(&pThis->fShutdown, true))
2087	VGSvcVerbose(3, "[PID %RU32]: Setting shutdown flag ...\n", pThis->uPID);
2088
2089	return VINF_SUCCESS;
2090	}
2091
2092
2093	static int vgsvcGstCtrlProcessRequestExV(PVBOXSERVICECTRLPROCESS pProcess, bool fAsync, RTMSINTERVAL cMsTimeout,
2094	PFNRT pfnFunction, unsigned cArgs, va_list Args)
2095	{
2096	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
2097	AssertPtrReturn(pfnFunction, VERR_INVALID_POINTER);
2098	if (!fAsync)
2099	AssertPtrReturn(pfnFunction, VERR_INVALID_POINTER);
2100
2101	int rc = vgsvcGstCtrlProcessLock(pProcess);
2102	if (RT_SUCCESS(rc))
2103	{
2104	#ifdef DEBUG
2105	VGSvcVerbose(3, "[PID %RU32]: vgsvcGstCtrlProcessRequestExV fAsync=%RTbool, cMsTimeout=%RU32, cArgs=%u\n",
2106	pProcess->uPID, fAsync, cMsTimeout, cArgs);
2107	#endif
2108	uint32_t fFlags = RTREQFLAGS_IPRT_STATUS;
2109	if (fAsync)
2110	{
2111	Assert(cMsTimeout == 0);
2112	fFlags \|= RTREQFLAGS_NO_WAIT;
2113	}
2114
2115	PRTREQ hReq = NIL_RTREQ;
2116	rc = RTReqQueueCallV(pProcess->hReqQueue, &hReq, cMsTimeout, fFlags, pfnFunction, cArgs, Args);
2117	RTReqRelease(hReq);
2118	if (RT_SUCCESS(rc))
2119	{
2120	/* Wake up the process' notification pipe to get
2121	* the request being processed. */
2122	Assert(pProcess->hNotificationPipeW != NIL_RTPIPE \|\| pProcess->fShutdown /* latter in case of race */);
2123	size_t cbWritten = 0;
2124	rc = RTPipeWrite(pProcess->hNotificationPipeW, "i", 1, &cbWritten);
2125	if ( RT_SUCCESS(rc)
2126	&& cbWritten != 1)
2127	{
2128	VGSvcError("[PID %RU32]: Notification pipe got %zu bytes instead of 1\n",
2129	pProcess->uPID, cbWritten);
2130	}
2131	else if (RT_UNLIKELY(RT_FAILURE(rc)))
2132	VGSvcError("[PID %RU32]: Writing to notification pipe failed, rc=%Rrc\n",
2133	pProcess->uPID, rc);
2134	}
2135	else
2136	VGSvcError("[PID %RU32]: RTReqQueueCallV failed, rc=%Rrc\n",
2137	pProcess->uPID, rc);
2138
2139	int rc2 = vgsvcGstCtrlProcessUnlock(pProcess);
2140	if (RT_SUCCESS(rc))
2141	rc = rc2;
2142	}
2143
2144	#ifdef DEBUG
2145	VGSvcVerbose(3, "[PID %RU32]: vgsvcGstCtrlProcessRequestExV returned rc=%Rrc\n", pProcess->uPID, rc);
2146	#endif
2147	return rc;
2148	}
2149
2150
2151	static int vgsvcGstCtrlProcessRequestAsync(PVBOXSERVICECTRLPROCESS pProcess, PFNRT pfnFunction, unsigned cArgs, ...)
2152	{
2153	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
2154	AssertPtrReturn(pfnFunction, VERR_INVALID_POINTER);
2155
2156	va_list va;
2157	va_start(va, cArgs);
2158	int rc = vgsvcGstCtrlProcessRequestExV(pProcess, true /* fAsync /, 0 / cMsTimeout */,
2159	pfnFunction, cArgs, va);
2160	va_end(va);
2161
2162	return rc;
2163	}
2164
2165
2166	#if 0 /* unused */
2167	static int vgsvcGstCtrlProcessRequestWait(PVBOXSERVICECTRLPROCESS pProcess, RTMSINTERVAL cMsTimeout,
2168	PFNRT pfnFunction, unsigned cArgs, ...)
2169	{
2170	AssertPtrReturn(pProcess, VERR_INVALID_POINTER);
2171	/* pHostCtx is optional. */
2172	AssertPtrReturn(pfnFunction, VERR_INVALID_POINTER);
2173
2174	va_list va;
2175	va_start(va, cArgs);
2176	int rc = vgsvcGstCtrlProcessRequestExV(pProcess, false /* fAsync */, cMsTimeout,
2177	pfnFunction, cArgs, va);
2178	va_end(va);
2179
2180	return rc;
2181	}
2182	#endif
2183
2184
2185	int VGSvcGstCtrlProcessHandleInput(PVBOXSERVICECTRLPROCESS pProcess, PVBGLR3GUESTCTRLCMDCTX pHostCtx,
2186	bool fPendingClose, void *pvBuf, uint32_t cbBuf)
2187	{
2188	if (!ASMAtomicReadBool(&pProcess->fShutdown) && !ASMAtomicReadBool(&pProcess->fStopped))
2189	return vgsvcGstCtrlProcessRequestAsync(pProcess, (PFNRT)vgsvcGstCtrlProcessOnInput, 5 /cArgs/,
2190	pProcess, pHostCtx, fPendingClose, pvBuf, cbBuf);
2191
2192	return vgsvcGstCtrlProcessOnInput(pProcess, pHostCtx, fPendingClose, pvBuf, cbBuf);
2193	}
2194
2195
2196	int VGSvcGstCtrlProcessHandleOutput(PVBOXSERVICECTRLPROCESS pProcess, PVBGLR3GUESTCTRLCMDCTX pHostCtx,
2197	uint32_t uHandle, uint32_t cbToRead, uint32_t fFlags)
2198	{
2199	if (!ASMAtomicReadBool(&pProcess->fShutdown) && !ASMAtomicReadBool(&pProcess->fStopped))
2200	return vgsvcGstCtrlProcessRequestAsync(pProcess, (PFNRT)vgsvcGstCtrlProcessOnOutput, 5 /cArgs/,
2201	pProcess, pHostCtx, uHandle, cbToRead, fFlags);
2202
2203	return vgsvcGstCtrlProcessOnOutput(pProcess, pHostCtx, uHandle, cbToRead, fFlags);
2204	}
2205
2206
2207	int VGSvcGstCtrlProcessHandleTerm(PVBOXSERVICECTRLPROCESS pProcess)
2208	{
2209	if (!ASMAtomicReadBool(&pProcess->fShutdown) && !ASMAtomicReadBool(&pProcess->fStopped))
2210	return vgsvcGstCtrlProcessRequestAsync(pProcess, (PFNRT)vgsvcGstCtrlProcessOnTerm, 1 /cArgs/, pProcess);
2211
2212	return vgsvcGstCtrlProcessOnTerm(pProcess);
2213	}
2214

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source: vbox/trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControlProcess.cpp

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