VBoxServiceControl.cpp@ 96663

Last change on this file since 96663 was 96407, checked in by vboxsync, 2 years ago
scm copyright and license note update
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 23.0 KB

Line
1	/* $Id: VBoxServiceControl.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2	/** @file
3	* VBoxServiceControl - Host-driven Guest Control.
4	*/
5
6	/*
7	* Copyright (C) 2012-2022 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	/** @page pg_vgsvc_gstctrl VBoxService - Guest Control
29	*
30	* The Guest Control subservice helps implementing the IGuest APIs.
31	*
32	* The communication between this service (and its children) and IGuest goes
33	* over the HGCM GuestControl service.
34	*
35	* The IGuest APIs provides means to manipulate (control) files, directories,
36	* symbolic links and processes within the guest. Most of these means requires
37	* credentials of a guest OS user to operate, though some restricted ones
38	* operates directly as the VBoxService user (root / system service account).
39	*
40	* The current design is that a subprocess is spawned for handling operations as
41	* a given user. This process is represented as IGuestSession in the API. The
42	* subprocess will be spawned as the given use, giving up the privileges the
43	* parent subservice had.
44	*
45	* It will try handle as many of the operations directly from within the
46	* subprocess, but for more complicated things (or things that haven't yet been
47	* converted), it will spawn a helper process that does the actual work.
48	*
49	* These helpers are the typically modeled on similar unix core utilities, like
50	* mkdir, rm, rmdir, cat and so on. The helper tools can also be launched
51	* directly from VBoxManage by the user by prepending the 'vbox_' prefix to the
52	* unix command.
53	*
54	*/
55
56
57	/*********************************************************************************************************************************
58	* Header Files *
59	*********************************************************************************************************************************/
60	#include <iprt/asm.h>
61	#include <iprt/assert.h>
62	#include <iprt/env.h>
63	#include <iprt/file.h>
64	#include <iprt/getopt.h>
65	#include <iprt/mem.h>
66	#include <iprt/path.h>
67	#include <iprt/process.h>
68	#include <iprt/semaphore.h>
69	#include <iprt/thread.h>
70	#include <VBox/err.h>
71	#include <VBox/VBoxGuestLib.h>
72	#include <VBox/HostServices/GuestControlSvc.h>
73	#include "VBoxServiceInternal.h"
74	#include "VBoxServiceControl.h"
75	#include "VBoxServiceUtils.h"
76
77	using namespace guestControl;
78
79
80	/*********************************************************************************************************************************
81	* Global Variables *
82	*********************************************************************************************************************************/
83	/** The control interval (milliseconds). */
84	static uint32_t g_msControlInterval = 0;
85	/** The semaphore we're blocking our main control thread on. */
86	static RTSEMEVENTMULTI g_hControlEvent = NIL_RTSEMEVENTMULTI;
87	/** The VM session ID. Changes whenever the VM is restored or reset. */
88	static uint64_t g_idControlSession;
89	/** The guest control service client ID. */
90	uint32_t g_idControlSvcClient = 0;
91	/** VBOX_GUESTCTRL_HF_XXX */
92	uint64_t g_fControlHostFeatures0 = 0;
93	#if 0 /** @todo process limit */
94	/** How many started guest processes are kept into memory for supplying
95	* information to the host. Default is 256 processes. If 0 is specified,
96	* the maximum number of processes is unlimited. */
97	static uint32_t g_uControlProcsMaxKept = 256;
98	#endif
99	/** List of guest control session threads (VBOXSERVICECTRLSESSIONTHREAD).
100	* A guest session thread represents a forked guest session process
101	* of VBoxService. */
102	RTLISTANCHOR g_lstControlSessionThreads;
103	/** The local session object used for handling all session-related stuff.
104	* When using the legacy guest control protocol (< 2), this session runs
105	* under behalf of the VBoxService main process. On newer protocol versions
106	* each session is a forked version of VBoxService using the appropriate
107	* user credentials for opening a guest session. These forked sessions then
108	* are kept in VBOXSERVICECTRLSESSIONTHREAD structures. */
109	VBOXSERVICECTRLSESSION g_Session;
110	/** Copy of VbglR3GuestCtrlSupportsOptimizations().*/
111	bool g_fControlSupportsOptimizations = true;
112
113
114	/*********************************************************************************************************************************
115	* Internal Functions *
116	*********************************************************************************************************************************/
117	static int vgsvcGstCtrlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
118	static int vgsvcGstCtrlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
119	static int vgsvcGstCtrlInvalidate(void);
120	static void vgsvcGstCtrlShutdown(void);
121
122
123	/**
124	* @interface_method_impl{VBOXSERVICE,pfnPreInit}
125	*/
126	static DECLCALLBACK(int) vgsvcGstCtrlPreInit(void)
127	{
128	int rc;
129	#ifdef VBOX_WITH_GUEST_PROPS
130	/*
131	* Read the service options from the VM's guest properties.
132	* Note that these options can be overridden by the command line options later.
133	*/
134	uint32_t uGuestPropSvcClientID;
135	rc = VbglR3GuestPropConnect(&uGuestPropSvcClientID);
136	if (RT_FAILURE(rc))
137	{
138	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
139	{
140	VGSvcVerbose(0, "Guest property service is not available, skipping\n");
141	rc = VINF_SUCCESS;
142	}
143	else
144	VGSvcError("Failed to connect to the guest property service, rc=%Rrc\n", rc);
145	}
146	else
147	VbglR3GuestPropDisconnect(uGuestPropSvcClientID);
148
149	if (rc == VERR_NOT_FOUND) /* If a value is not found, don't be sad! */
150	rc = VINF_SUCCESS;
151	#else
152	/* Nothing to do here yet. */
153	rc = VINF_SUCCESS;
154	#endif
155
156	if (RT_SUCCESS(rc))
157	{
158	/* Init session object. */
159	rc = VGSvcGstCtrlSessionInit(&g_Session, 0 /* Flags */);
160	}
161
162	return rc;
163	}
164
165
166	/**
167	* @interface_method_impl{VBOXSERVICE,pfnOption}
168	*/
169	static DECLCALLBACK(int) vgsvcGstCtrlOption(const char ppszShort, int argc, char argv, int *pi)
170	{
171	int rc = -1;
172	if (ppszShort)
173	/* no short options */;
174	else if (!strcmp(argv[*pi], "--control-interval"))
175	rc = VGSvcArgUInt32(argc, argv, "", pi,
176	&g_msControlInterval, 1, UINT32_MAX - 1);
177	#ifdef DEBUG
178	else if (!strcmp(argv[*pi], "--control-dump-stdout"))
179	{
180	g_Session.fFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDOUT;
181	rc = 0; /* Flag this command as parsed. */
182	}
183	else if (!strcmp(argv[*pi], "--control-dump-stderr"))
184	{
185	g_Session.fFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDERR;
186	rc = 0; /* Flag this command as parsed. */
187	}
188	#endif
189	return rc;
190	}
191
192
193	/**
194	* @interface_method_impl{VBOXSERVICE,pfnInit}
195	*/
196	static DECLCALLBACK(int) vgsvcGstCtrlInit(void)
197	{
198	/*
199	* If not specified, find the right interval default.
200	* Then create the event sem to block on.
201	*/
202	if (!g_msControlInterval)
203	g_msControlInterval = 1000;
204
205	int rc = RTSemEventMultiCreate(&g_hControlEvent);
206	AssertRCReturn(rc, rc);
207
208	VbglR3GetSessionId(&g_idControlSession); /* The status code is ignored as this information is not available with VBox < 3.2.10. */
209
210	RTListInit(&g_lstControlSessionThreads);
211
212	/*
213	* Try connect to the host service and tell it we want to be master (if supported).
214	*/
215	rc = VbglR3GuestCtrlConnect(&g_idControlSvcClient);
216	if (RT_SUCCESS(rc))
217	{
218	rc = vgsvcGstCtrlInvalidate();
219	if (RT_SUCCESS(rc))
220	return rc;
221	}
222	else
223	{
224	/* If the service was not found, we disable this service without
225	causing VBoxService to fail. */
226	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
227	{
228	VGSvcVerbose(0, "Guest control service is not available\n");
229	rc = VERR_SERVICE_DISABLED;
230	}
231	else
232	VGSvcError("Failed to connect to the guest control service! Error: %Rrc\n", rc);
233	}
234	RTSemEventMultiDestroy(g_hControlEvent);
235	g_hControlEvent = NIL_RTSEMEVENTMULTI;
236	g_idControlSvcClient = 0;
237	return rc;
238	}
239
240	static int vgsvcGstCtrlInvalidate(void)
241	{
242	VGSvcVerbose(1, "Invalidating configuration ...\n");
243
244	int rc = VINF_SUCCESS;
245
246	g_fControlSupportsOptimizations = VbglR3GuestCtrlSupportsOptimizations(g_idControlSvcClient);
247	if (g_fControlSupportsOptimizations)
248	rc = VbglR3GuestCtrlMakeMeMaster(g_idControlSvcClient);
249	if (RT_SUCCESS(rc))
250	{
251	VGSvcVerbose(3, "Guest control service client ID=%RU32%s\n",
252	g_idControlSvcClient, g_fControlSupportsOptimizations ? " w/ optimizations" : "");
253
254	/*
255	* Report features to the host.
256	*/
257	const uint64_t fGuestFeatures = VBOX_GUESTCTRL_GF_0_SET_SIZE
258	\| VBOX_GUESTCTRL_GF_0_PROCESS_ARGV0
259	\| VBOX_GUESTCTRL_GF_0_PROCESS_DYNAMIC_SIZES
260	\| VBOX_GUESTCTRL_GF_0_SHUTDOWN;
261
262	rc = VbglR3GuestCtrlReportFeatures(g_idControlSvcClient, fGuestFeatures, &g_fControlHostFeatures0);
263	if (RT_SUCCESS(rc))
264	VGSvcVerbose(3, "Host features: %#RX64\n", g_fControlHostFeatures0);
265	else
266	VGSvcVerbose(1, "Warning! Feature reporing failed: %Rrc\n", rc);
267
268	return VINF_SUCCESS;
269	}
270	VGSvcError("Failed to become guest control master: %Rrc\n", rc);
271	VbglR3GuestCtrlDisconnect(g_idControlSvcClient);
272
273	return rc;
274	}
275
276	/**
277	* @interface_method_impl{VBOXSERVICE,pfnWorker}
278	*/
279	static DECLCALLBACK(int) vgsvcGstCtrlWorker(bool volatile *pfShutdown)
280	{
281	/*
282	* Tell the control thread that it can continue spawning services.
283	*/
284	RTThreadUserSignal(RTThreadSelf());
285	Assert(g_idControlSvcClient > 0);
286
287	/* Allocate a scratch buffer for messages which also send
288	* payload data with them. */
289	uint32_t cbScratchBuf = _64K; /** @todo Make buffer size configurable via guest properties/argv! */
290	AssertReturn(RT_IS_POWER_OF_TWO(cbScratchBuf), VERR_INVALID_PARAMETER);
291	uint8_t pvScratchBuf = (uint8_t)RTMemAlloc(cbScratchBuf);
292	AssertReturn(pvScratchBuf, VERR_NO_MEMORY);
293
294	int rc = VINF_SUCCESS; /* (shut up compiler warnings) */
295	int cRetrievalFailed = 0; /* Number of failed message retrievals in a row. */
296	while (!*pfShutdown)
297	{
298	VGSvcVerbose(3, "GstCtrl: Waiting for host msg ...\n");
299	VBGLR3GUESTCTRLCMDCTX ctxHost = { g_idControlSvcClient, 0 /idContext/, 2 /uProtocol/, 0 /cParms/ };
300	uint32_t idMsg = 0;
301	rc = VbglR3GuestCtrlMsgPeekWait(g_idControlSvcClient, &idMsg, &ctxHost.uNumParms, &g_idControlSession);
302	if (RT_SUCCESS(rc))
303	{
304	cRetrievalFailed = 0; /* Reset failed retrieval count. */
305	VGSvcVerbose(4, "idMsg=%RU32 (%s) (%RU32 parms) retrieved\n",
306	idMsg, GstCtrlHostMsgtoStr((eHostMsg)idMsg), ctxHost.uNumParms);
307
308	/*
309	* Handle the host message.
310	*/
311	switch (idMsg)
312	{
313	case HOST_MSG_CANCEL_PENDING_WAITS:
314	VGSvcVerbose(1, "We were asked to quit ...\n");
315	break;
316
317	case HOST_MSG_SESSION_CREATE:
318	rc = vgsvcGstCtrlHandleSessionOpen(&ctxHost);
319	break;
320
321	/* This message is also sent to the child session process (by the host). */
322	case HOST_MSG_SESSION_CLOSE:
323	rc = vgsvcGstCtrlHandleSessionClose(&ctxHost);
324	break;
325
326	default:
327	if (VbglR3GuestCtrlSupportsOptimizations(g_idControlSvcClient))
328	{
329	rc = VbglR3GuestCtrlMsgSkip(g_idControlSvcClient, VERR_NOT_SUPPORTED, idMsg);
330	VGSvcVerbose(1, "Skipped unexpected message idMsg=%RU32 (%s), cParms=%RU32 (rc=%Rrc)\n",
331	idMsg, GstCtrlHostMsgtoStr((eHostMsg)idMsg), ctxHost.uNumParms, rc);
332	}
333	else
334	{
335	rc = VbglR3GuestCtrlMsgSkipOld(g_idControlSvcClient);
336	VGSvcVerbose(3, "Skipped idMsg=%RU32, cParms=%RU32, rc=%Rrc\n", idMsg, ctxHost.uNumParms, rc);
337	}
338	break;
339	}
340
341	/* Do we need to shutdown? */
342	if (idMsg == HOST_MSG_CANCEL_PENDING_WAITS)
343	break;
344
345	/* Let's sleep for a bit and let others run ... */
346	RTThreadYield();
347	}
348	/*
349	* Handle restore notification from host. All the context IDs (sessions,
350	* files, proceses, etc) are invalidated by a VM restore and must be closed.
351	*/
352	else if (rc == VERR_VM_RESTORED)
353	{
354	VGSvcVerbose(1, "The VM session ID changed (i.e. restored), closing stale root session\n");
355
356	/* Make sure that all other session threads are gone.
357	* This is necessary, as the new VM session (NOT to be confused with guest session!) will re-use
358	* the guest session IDs. */
359	int rc2 = VGSvcGstCtrlSessionThreadDestroyAll(&g_lstControlSessionThreads, 0 /* Flags */);
360	if (RT_FAILURE(rc2))
361	VGSvcError("Closing session threads failed with rc=%Rrc\n", rc2);
362
363	/* Make sure to also close the root session (session 0). */
364	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
365	AssertRC(rc2);
366
367	rc2 = VbglR3GuestCtrlSessionHasChanged(g_idControlSvcClient, g_idControlSession);
368	AssertRC(rc2);
369
370	/* Invalidate the internal state to match the current host we got restored from. */
371	rc2 = vgsvcGstCtrlInvalidate();
372	AssertRC(rc2);
373	}
374	else
375	{
376	/* Note: VERR_GEN_IO_FAILURE seems to be normal if ran into timeout. */
377	/** @todo r=bird: Above comment makes no sense. How can you get a timeout in a blocking HGCM call? */
378	VGSvcError("GstCtrl: Getting host message failed with %Rrc\n", rc);
379
380	/* Check for VM session change. */
381	/** @todo We don't need to check the host here. */
382	uint64_t idNewSession = g_idControlSession;
383	int rc2 = VbglR3GetSessionId(&idNewSession);
384	if ( RT_SUCCESS(rc2)
385	&& (idNewSession != g_idControlSession))
386	{
387	VGSvcVerbose(1, "GstCtrl: The VM session ID changed\n");
388	g_idControlSession = idNewSession;
389
390	/* Close all opened guest sessions -- all context IDs, sessions etc.
391	* are now invalid. */
392	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
393	AssertRC(rc2);
394
395	/* Do a reconnect. */
396	VGSvcVerbose(1, "Reconnecting to HGCM service ...\n");
397	rc2 = VbglR3GuestCtrlConnect(&g_idControlSvcClient);
398	if (RT_SUCCESS(rc2))
399	{
400	VGSvcVerbose(3, "Guest control service client ID=%RU32\n", g_idControlSvcClient);
401	cRetrievalFailed = 0;
402	continue; /* Skip waiting. */
403	}
404	VGSvcError("Unable to re-connect to HGCM service, rc=%Rrc, bailing out\n", rc);
405	break;
406	}
407
408	if (rc == VERR_INTERRUPTED)
409	RTThreadYield(); /* To be on the safe side... */
410	else if (++cRetrievalFailed <= 16) /** @todo Make this configurable? */
411	RTThreadSleep(1000); /* Wait a bit before retrying. */
412	else
413	{
414	VGSvcError("Too many failed attempts in a row to get next message, bailing out\n");
415	break;
416	}
417	}
418	}
419
420	VGSvcVerbose(0, "Guest control service stopped\n");
421
422	/* Delete scratch buffer. */
423	if (pvScratchBuf)
424	RTMemFree(pvScratchBuf);
425
426	VGSvcVerbose(0, "Guest control worker returned with rc=%Rrc\n", rc);
427	return rc;
428	}
429
430
431	static int vgsvcGstCtrlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
432	{
433	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
434
435	/*
436	* Retrieve the message parameters.
437	*/
438	PVBGLR3GUESTCTRLSESSIONSTARTUPINFO pStartupInfo;
439	int rc = VbglR3GuestCtrlSessionGetOpen(pHostCtx, &pStartupInfo);
440	if (RT_SUCCESS(rc))
441	{
442	/*
443	* Flat out refuse to work with protocol v1 hosts.
444	*/
445	if (pStartupInfo->uProtocol == 2)
446	{
447	pHostCtx->uProtocol = pStartupInfo->uProtocol;
448	VGSvcVerbose(3, "Client ID=%RU32 now is using protocol %RU32\n", pHostCtx->uClientID, pHostCtx->uProtocol);
449
450	/** @todo Someone explain why this code isn't in this file too? v1 support? */
451	rc = VGSvcGstCtrlSessionThreadCreate(&g_lstControlSessionThreads, pStartupInfo, NULL /* ppSessionThread */);
452	/* Report failures to the host (successes are taken care of by the session thread). */
453	}
454	else
455	{
456	VGSvcError("The host wants to use protocol v%u, we only support v2!\n", pStartupInfo->uProtocol);
457	rc = VERR_VERSION_MISMATCH;
458	}
459	if (RT_FAILURE(rc))
460	{
461	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx, GUEST_SESSION_NOTIFYTYPE_ERROR, rc);
462	if (RT_FAILURE(rc2))
463	VGSvcError("Reporting session error status on open failed with rc=%Rrc\n", rc2);
464	}
465	}
466	else
467	{
468	VGSvcError("Error fetching parameters for opening guest session: %Rrc\n", rc);
469	VbglR3GuestCtrlMsgSkip(pHostCtx->uClientID, rc, UINT32_MAX);
470	}
471
472	VbglR3GuestCtrlSessionStartupInfoFree(pStartupInfo);
473	pStartupInfo = NULL;
474
475	VGSvcVerbose(3, "Opening a new guest session returned rc=%Rrc\n", rc);
476	return rc;
477	}
478
479
480	static int vgsvcGstCtrlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
481	{
482	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
483
484	uint32_t idSession;
485	uint32_t fFlags;
486	int rc = VbglR3GuestCtrlSessionGetClose(pHostCtx, &fFlags, &idSession);
487	if (RT_SUCCESS(rc))
488	{
489	rc = VERR_NOT_FOUND;
490
491	PVBOXSERVICECTRLSESSIONTHREAD pThread;
492	RTListForEach(&g_lstControlSessionThreads, pThread, VBOXSERVICECTRLSESSIONTHREAD, Node)
493	{
494	if ( pThread->pStartupInfo
495	&& pThread->pStartupInfo->uSessionID == idSession)
496	{
497	rc = VGSvcGstCtrlSessionThreadDestroy(pThread, fFlags);
498	break;
499	}
500	}
501
502	#if 0 /** @todo A bit of a mess here as this message goes to both to this process (master) and the session process. */
503	if (RT_FAILURE(rc))
504	{
505	/* Report back on failure. On success this will be done
506	* by the forked session thread. */
507	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx,
508	GUEST_SESSION_NOTIFYTYPE_ERROR, rc);
509	if (RT_FAILURE(rc2))
510	{
511	VGSvcError("Reporting session error status on close failed with rc=%Rrc\n", rc2);
512	if (RT_SUCCESS(rc))
513	rc = rc2;
514	}
515	}
516	#endif
517	VGSvcVerbose(2, "Closing guest session %RU32 returned rc=%Rrc\n", idSession, rc);
518	}
519	else
520	{
521	VGSvcError("Error fetching parameters for closing guest session: %Rrc\n", rc);
522	VbglR3GuestCtrlMsgSkip(pHostCtx->uClientID, rc, UINT32_MAX);
523	}
524	return rc;
525	}
526
527
528	/**
529	* @interface_method_impl{VBOXSERVICE,pfnStop}
530	*/
531	static DECLCALLBACK(void) vgsvcGstCtrlStop(void)
532	{
533	VGSvcVerbose(3, "Stopping ...\n");
534
535	/** @todo Later, figure what to do if we're in RTProcWait(). It's a very
536	* annoying call since doesn't support timeouts in the posix world. */
537	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
538	RTSemEventMultiSignal(g_hControlEvent);
539
540	/*
541	* Ask the host service to cancel all pending requests for the main
542	* control thread so that we can shutdown properly here.
543	*/
544	if (g_idControlSvcClient)
545	{
546	VGSvcVerbose(3, "Cancelling pending waits (client ID=%u) ...\n",
547	g_idControlSvcClient);
548
549	int rc = VbglR3GuestCtrlCancelPendingWaits(g_idControlSvcClient);
550	if (RT_FAILURE(rc))
551	VGSvcError("Cancelling pending waits failed; rc=%Rrc\n", rc);
552	}
553	}
554
555
556	/**
557	* Destroys all guest process threads which are still active.
558	*/
559	static void vgsvcGstCtrlShutdown(void)
560	{
561	VGSvcVerbose(2, "Shutting down ...\n");
562
563	int rc2 = VGSvcGstCtrlSessionThreadDestroyAll(&g_lstControlSessionThreads, 0 /* Flags */);
564	if (RT_FAILURE(rc2))
565	VGSvcError("Closing session threads failed with rc=%Rrc\n", rc2);
566
567	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
568	if (RT_FAILURE(rc2))
569	VGSvcError("Closing session failed with rc=%Rrc\n", rc2);
570
571	VGSvcVerbose(2, "Shutting down complete\n");
572	}
573
574
575	/**
576	* @interface_method_impl{VBOXSERVICE,pfnTerm}
577	*/
578	static DECLCALLBACK(void) vgsvcGstCtrlTerm(void)
579	{
580	VGSvcVerbose(3, "Terminating ...\n");
581
582	vgsvcGstCtrlShutdown();
583
584	VGSvcVerbose(3, "Disconnecting client ID=%u ...\n", g_idControlSvcClient);
585	VbglR3GuestCtrlDisconnect(g_idControlSvcClient);
586	g_idControlSvcClient = 0;
587
588	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
589	{
590	RTSemEventMultiDestroy(g_hControlEvent);
591	g_hControlEvent = NIL_RTSEMEVENTMULTI;
592	}
593	}
594
595
596	/**
597	* The 'vminfo' service description.
598	*/
599	VBOXSERVICE g_Control =
600	{
601	/* pszName. */
602	"control",
603	/* pszDescription. */
604	"Host-driven Guest Control",
605	/* pszUsage. */
606	#ifdef DEBUG
607	" [--control-dump-stderr] [--control-dump-stdout]\n"
608	#endif
609	" [--control-interval <ms>]"
610	,
611	/* pszOptions. */
612	#ifdef DEBUG
613	" --control-dump-stderr Dumps all guest proccesses stderr data to the\n"
614	" temporary directory.\n"
615	" --control-dump-stdout Dumps all guest proccesses stdout data to the\n"
616	" temporary directory.\n"
617	#endif
618	" --control-interval Specifies the interval at which to check for\n"
619	" new control messages. The default is 1000 ms.\n"
620	,
621	/* methods */
622	vgsvcGstCtrlPreInit,
623	vgsvcGstCtrlOption,
624	vgsvcGstCtrlInit,
625	vgsvcGstCtrlWorker,
626	vgsvcGstCtrlStop,
627	vgsvcGstCtrlTerm
628	};
629

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControl.cpp@ 96663

Download in other formats: