VBoxServiceControl.cpp@ 83958

Last change on this file since 83958 was 83405, checked in by vboxsync, 5 years ago
Guest Control/Main + VBoxService: Resolved another @todo: Added ability for guest processes to use argv[0] independently of the actual execution command. bugref:9320
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 21.8 KB

Line
1	/* $Id: VBoxServiceControl.cpp 83405 2020-03-25 12:45:01Z vboxsync $ */
2	/** @file
3	* VBoxServiceControl - Host-driven Guest Control.
4	*/
5
6	/*
7	* Copyright (C) 2012-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/** @page pg_vgsvc_gstctrl VBoxService - Guest Control
19	*
20	* The Guest Control subservice helps implementing the IGuest APIs.
21	*
22	* The communication between this service (and its children) and IGuest goes
23	* over the HGCM GuestControl service.
24	*
25	* The IGuest APIs provides means to manipulate (control) files, directories,
26	* symbolic links and processes within the guest. Most of these means requires
27	* credentials of a guest OS user to operate, though some restricted ones
28	* operates directly as the VBoxService user (root / system service account).
29	*
30	* The current design is that a subprocess is spawned for handling operations as
31	* a given user. This process is represented as IGuestSession in the API. The
32	* subprocess will be spawned as the given use, giving up the privileges the
33	* parent subservice had.
34	*
35	* It will try handle as many of the operations directly from within the
36	* subprocess, but for more complicated things (or things that haven't yet been
37	* converted), it will spawn a helper process that does the actual work.
38	*
39	* These helpers are the typically modeled on similar unix core utilities, like
40	* mkdir, rm, rmdir, cat and so on. The helper tools can also be launched
41	* directly from VBoxManage by the user by prepending the 'vbox_' prefix to the
42	* unix command.
43	*
44	*/
45
46
47	/*********************************************************************************************************************************
48	* Header Files *
49	*********************************************************************************************************************************/
50	#include <iprt/asm.h>
51	#include <iprt/assert.h>
52	#include <iprt/env.h>
53	#include <iprt/file.h>
54	#include <iprt/getopt.h>
55	#include <iprt/mem.h>
56	#include <iprt/path.h>
57	#include <iprt/process.h>
58	#include <iprt/semaphore.h>
59	#include <iprt/thread.h>
60	#include <VBox/err.h>
61	#include <VBox/VBoxGuestLib.h>
62	#include <VBox/HostServices/GuestControlSvc.h>
63	#include "VBoxServiceInternal.h"
64	#include "VBoxServiceControl.h"
65	#include "VBoxServiceUtils.h"
66
67	using namespace guestControl;
68
69
70	/*********************************************************************************************************************************
71	* Global Variables *
72	*********************************************************************************************************************************/
73	/** The control interval (milliseconds). */
74	static uint32_t g_msControlInterval = 0;
75	/** The semaphore we're blocking our main control thread on. */
76	static RTSEMEVENTMULTI g_hControlEvent = NIL_RTSEMEVENTMULTI;
77	/** The VM session ID. Changes whenever the VM is restored or reset. */
78	static uint64_t g_idControlSession;
79	/** The guest control service client ID. */
80	uint32_t g_idControlSvcClient = 0;
81	/** VBOX_GUESTCTRL_HF_XXX */
82	uint64_t g_fControlHostFeatures0 = 0;
83	#if 0 /** @todo process limit */
84	/** How many started guest processes are kept into memory for supplying
85	* information to the host. Default is 256 processes. If 0 is specified,
86	* the maximum number of processes is unlimited. */
87	static uint32_t g_uControlProcsMaxKept = 256;
88	#endif
89	/** List of guest control session threads (VBOXSERVICECTRLSESSIONTHREAD).
90	* A guest session thread represents a forked guest session process
91	* of VBoxService. */
92	RTLISTANCHOR g_lstControlSessionThreads;
93	/** The local session object used for handling all session-related stuff.
94	* When using the legacy guest control protocol (< 2), this session runs
95	* under behalf of the VBoxService main process. On newer protocol versions
96	* each session is a forked version of VBoxService using the appropriate
97	* user credentials for opening a guest session. These forked sessions then
98	* are kept in VBOXSERVICECTRLSESSIONTHREAD structures. */
99	VBOXSERVICECTRLSESSION g_Session;
100	/** Copy of VbglR3GuestCtrlSupportsOptimizations().*/
101	bool g_fControlSupportsOptimizations = true;
102
103
104	/*********************************************************************************************************************************
105	* Internal Functions *
106	*********************************************************************************************************************************/
107	static int vgsvcGstCtrlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
108	static int vgsvcGstCtrlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
109	static void vgsvcGstCtrlShutdown(void);
110
111
112	/**
113	* @interface_method_impl{VBOXSERVICE,pfnPreInit}
114	*/
115	static DECLCALLBACK(int) vgsvcGstCtrlPreInit(void)
116	{
117	int rc;
118	#ifdef VBOX_WITH_GUEST_PROPS
119	/*
120	* Read the service options from the VM's guest properties.
121	* Note that these options can be overridden by the command line options later.
122	*/
123	uint32_t uGuestPropSvcClientID;
124	rc = VbglR3GuestPropConnect(&uGuestPropSvcClientID);
125	if (RT_FAILURE(rc))
126	{
127	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
128	{
129	VGSvcVerbose(0, "Guest property service is not available, skipping\n");
130	rc = VINF_SUCCESS;
131	}
132	else
133	VGSvcError("Failed to connect to the guest property service, rc=%Rrc\n", rc);
134	}
135	else
136	VbglR3GuestPropDisconnect(uGuestPropSvcClientID);
137
138	if (rc == VERR_NOT_FOUND) /* If a value is not found, don't be sad! */
139	rc = VINF_SUCCESS;
140	#else
141	/* Nothing to do here yet. */
142	rc = VINF_SUCCESS;
143	#endif
144
145	if (RT_SUCCESS(rc))
146	{
147	/* Init session object. */
148	rc = VGSvcGstCtrlSessionInit(&g_Session, 0 /* Flags */);
149	}
150
151	return rc;
152	}
153
154
155	/**
156	* @interface_method_impl{VBOXSERVICE,pfnOption}
157	*/
158	static DECLCALLBACK(int) vgsvcGstCtrlOption(const char ppszShort, int argc, char argv, int *pi)
159	{
160	int rc = -1;
161	if (ppszShort)
162	/* no short options */;
163	else if (!strcmp(argv[*pi], "--control-interval"))
164	rc = VGSvcArgUInt32(argc, argv, "", pi,
165	&g_msControlInterval, 1, UINT32_MAX - 1);
166	#ifdef DEBUG
167	else if (!strcmp(argv[*pi], "--control-dump-stdout"))
168	{
169	g_Session.fFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDOUT;
170	rc = 0; /* Flag this command as parsed. */
171	}
172	else if (!strcmp(argv[*pi], "--control-dump-stderr"))
173	{
174	g_Session.fFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDERR;
175	rc = 0; /* Flag this command as parsed. */
176	}
177	#endif
178	return rc;
179	}
180
181
182	/**
183	* @interface_method_impl{VBOXSERVICE,pfnInit}
184	*/
185	static DECLCALLBACK(int) vgsvcGstCtrlInit(void)
186	{
187	/*
188	* If not specified, find the right interval default.
189	* Then create the event sem to block on.
190	*/
191	if (!g_msControlInterval)
192	g_msControlInterval = 1000;
193
194	int rc = RTSemEventMultiCreate(&g_hControlEvent);
195	AssertRCReturn(rc, rc);
196
197	VbglR3GetSessionId(&g_idControlSession); /* The status code is ignored as this information is not available with VBox < 3.2.10. */
198
199	RTListInit(&g_lstControlSessionThreads);
200
201	/*
202	* Try connect to the host service and tell it we want to be master (if supported).
203	*/
204	rc = VbglR3GuestCtrlConnect(&g_idControlSvcClient);
205	if (RT_SUCCESS(rc))
206	{
207	g_fControlSupportsOptimizations = VbglR3GuestCtrlSupportsOptimizations(g_idControlSvcClient);
208	if (g_fControlSupportsOptimizations)
209	rc = VbglR3GuestCtrlMakeMeMaster(g_idControlSvcClient);
210	if (RT_SUCCESS(rc))
211	{
212	VGSvcVerbose(3, "Guest control service client ID=%RU32%s\n",
213	g_idControlSvcClient, g_fControlSupportsOptimizations ? " w/ optimizations" : "");
214
215	/*
216	* Report features to the host.
217	*/
218	const uint64_t fGuestFeatures = VBOX_GUESTCTRL_GF_0_SET_SIZE
219	\| VBOX_GUESTCTRL_GF_0_PROCESS_ARGV0;
220
221	rc = VbglR3GuestCtrlReportFeatures(g_idControlSvcClient, fGuestFeatures, &g_fControlHostFeatures0);
222	if (RT_SUCCESS(rc))
223	VGSvcVerbose(3, "Host features: %#RX64\n", g_fControlHostFeatures0);
224	else
225	VGSvcVerbose(1, "Warning! Feature reporing failed: %Rrc\n", rc);
226
227	return VINF_SUCCESS;
228	}
229	VGSvcError("Failed to become guest control master: %Rrc\n", rc);
230	VbglR3GuestCtrlDisconnect(g_idControlSvcClient);
231	}
232	else
233	{
234	/* If the service was not found, we disable this service without
235	causing VBoxService to fail. */
236	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
237	{
238	VGSvcVerbose(0, "Guest control service is not available\n");
239	rc = VERR_SERVICE_DISABLED;
240	}
241	else
242	VGSvcError("Failed to connect to the guest control service! Error: %Rrc\n", rc);
243	}
244	RTSemEventMultiDestroy(g_hControlEvent);
245	g_hControlEvent = NIL_RTSEMEVENTMULTI;
246	g_idControlSvcClient = 0;
247	return rc;
248	}
249
250
251	/**
252	* @interface_method_impl{VBOXSERVICE,pfnWorker}
253	*/
254	static DECLCALLBACK(int) vgsvcGstCtrlWorker(bool volatile *pfShutdown)
255	{
256	/*
257	* Tell the control thread that it can continue spawning services.
258	*/
259	RTThreadUserSignal(RTThreadSelf());
260	Assert(g_idControlSvcClient > 0);
261
262	/* Allocate a scratch buffer for messages which also send
263	* payload data with them. */
264	uint32_t cbScratchBuf = _64K; /** @todo Make buffer size configurable via guest properties/argv! */
265	AssertReturn(RT_IS_POWER_OF_TWO(cbScratchBuf), VERR_INVALID_PARAMETER);
266	uint8_t pvScratchBuf = (uint8_t)RTMemAlloc(cbScratchBuf);
267	AssertReturn(pvScratchBuf, VERR_NO_MEMORY);
268
269	int rc = VINF_SUCCESS; /* (shut up compiler warnings) */
270	int cRetrievalFailed = 0; /* Number of failed message retrievals in a row. */
271	while (!*pfShutdown)
272	{
273	VGSvcVerbose(3, "GstCtrl: Waiting for host msg ...\n");
274	VBGLR3GUESTCTRLCMDCTX ctxHost = { g_idControlSvcClient, 0 /idContext/, 2 /uProtocol/, 0 /cParms/ };
275	uint32_t idMsg = 0;
276	rc = VbglR3GuestCtrlMsgPeekWait(g_idControlSvcClient, &idMsg, &ctxHost.uNumParms, &g_idControlSession);
277	if (RT_SUCCESS(rc))
278	{
279	cRetrievalFailed = 0; /* Reset failed retrieval count. */
280	VGSvcVerbose(4, "idMsg=%RU32 (%s) (%RU32 parms) retrieved\n",
281	idMsg, GstCtrlHostMsgtoStr((eHostMsg)idMsg), ctxHost.uNumParms);
282
283	/*
284	* Handle the host message.
285	*/
286	switch (idMsg)
287	{
288	case HOST_MSG_CANCEL_PENDING_WAITS:
289	VGSvcVerbose(1, "We were asked to quit ...\n");
290	break;
291
292	case HOST_MSG_SESSION_CREATE:
293	rc = vgsvcGstCtrlHandleSessionOpen(&ctxHost);
294	break;
295
296	/* This message is also sent to the child session process (by the host). */
297	case HOST_MSG_SESSION_CLOSE:
298	rc = vgsvcGstCtrlHandleSessionClose(&ctxHost);
299	break;
300
301	default:
302	if (VbglR3GuestCtrlSupportsOptimizations(g_idControlSvcClient))
303	{
304	rc = VbglR3GuestCtrlMsgSkip(g_idControlSvcClient, VERR_NOT_SUPPORTED, idMsg);
305	VGSvcVerbose(1, "Skipped unexpected message idMsg=%RU32 (%s), cParms=%RU32 (rc=%Rrc)\n",
306	idMsg, GstCtrlHostMsgtoStr((eHostMsg)idMsg), ctxHost.uNumParms, rc);
307	}
308	else
309	{
310	rc = VbglR3GuestCtrlMsgSkipOld(g_idControlSvcClient);
311	VGSvcVerbose(3, "Skipped idMsg=%RU32, cParms=%RU32, rc=%Rrc\n", idMsg, ctxHost.uNumParms, rc);
312	}
313	break;
314	}
315
316	/* Do we need to shutdown? */
317	if (idMsg == HOST_MSG_CANCEL_PENDING_WAITS)
318	break;
319
320	/* Let's sleep for a bit and let others run ... */
321	RTThreadYield();
322	}
323	/*
324	* Handle restore notification from host. All the context IDs (sessions,
325	* files, proceses, etc) are invalidated by a VM restore and must be closed.
326	*/
327	else if (rc == VERR_VM_RESTORED)
328	{
329	VGSvcVerbose(1, "The VM session ID changed (i.e. restored).\n");
330	int rc2 = VGSvcGstCtrlSessionClose(&g_Session);
331	AssertRC(rc2);
332	}
333	else
334	{
335	/* Note: VERR_GEN_IO_FAILURE seems to be normal if ran into timeout. */
336	/** @todo r=bird: Above comment makes no sense. How can you get a timeout in a blocking HGCM call? */
337	VGSvcError("GstCtrl: Getting host message failed with %Rrc\n", rc);
338
339	/* Check for VM session change. */
340	/** @todo We don't need to check the host here. */
341	uint64_t idNewSession = g_idControlSession;
342	int rc2 = VbglR3GetSessionId(&idNewSession);
343	if ( RT_SUCCESS(rc2)
344	&& (idNewSession != g_idControlSession))
345	{
346	VGSvcVerbose(1, "GstCtrl: The VM session ID changed\n");
347	g_idControlSession = idNewSession;
348
349	/* Close all opened guest sessions -- all context IDs, sessions etc.
350	* are now invalid. */
351	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
352	AssertRC(rc2);
353
354	/* Do a reconnect. */
355	VGSvcVerbose(1, "Reconnecting to HGCM service ...\n");
356	rc2 = VbglR3GuestCtrlConnect(&g_idControlSvcClient);
357	if (RT_SUCCESS(rc2))
358	{
359	VGSvcVerbose(3, "Guest control service client ID=%RU32\n", g_idControlSvcClient);
360	cRetrievalFailed = 0;
361	continue; /* Skip waiting. */
362	}
363	VGSvcError("Unable to re-connect to HGCM service, rc=%Rrc, bailing out\n", rc);
364	break;
365	}
366
367	if (rc == VERR_INTERRUPTED)
368	RTThreadYield(); /* To be on the safe side... */
369	else if (++cRetrievalFailed <= 16) /** @todo Make this configurable? */
370	RTThreadSleep(1000); /* Wait a bit before retrying. */
371	else
372	{
373	VGSvcError("Too many failed attempts in a row to get next message, bailing out\n");
374	break;
375	}
376	}
377	}
378
379	VGSvcVerbose(0, "Guest control service stopped\n");
380
381	/* Delete scratch buffer. */
382	if (pvScratchBuf)
383	RTMemFree(pvScratchBuf);
384
385	VGSvcVerbose(0, "Guest control worker returned with rc=%Rrc\n", rc);
386	return rc;
387	}
388
389
390	static int vgsvcGstCtrlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
391	{
392	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
393
394	/*
395	* Retrieve the message parameters.
396	*/
397	VBOXSERVICECTRLSESSIONSTARTUPINFO ssInfo = { 0 };
398	int rc = VbglR3GuestCtrlSessionGetOpen(pHostCtx,
399	&ssInfo.uProtocol,
400	ssInfo.szUser, sizeof(ssInfo.szUser),
401	ssInfo.szPassword, sizeof(ssInfo.szPassword),
402	ssInfo.szDomain, sizeof(ssInfo.szDomain),
403	&ssInfo.fFlags, &ssInfo.uSessionID);
404	if (RT_SUCCESS(rc))
405	{
406	/*
407	* Flat out refuse to work with protocol v1 hosts.
408	*/
409	if (ssInfo.uProtocol == 2)
410	{
411	pHostCtx->uProtocol = ssInfo.uProtocol;
412	VGSvcVerbose(3, "Client ID=%RU32 now is using protocol %RU32\n", pHostCtx->uClientID, pHostCtx->uProtocol);
413
414	/** @todo Someone explain why this code isn't in this file too? v1 support? */
415	rc = VGSvcGstCtrlSessionThreadCreate(&g_lstControlSessionThreads, &ssInfo, NULL /* ppSessionThread */);
416	/* Report failures to the host (successes are taken care of by the session thread). */
417	}
418	else
419	{
420	VGSvcError("The host wants to use protocol v%u, we only support v2!\n", ssInfo.uProtocol);
421	rc = VERR_VERSION_MISMATCH;
422	}
423	if (RT_FAILURE(rc))
424	{
425	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx, GUEST_SESSION_NOTIFYTYPE_ERROR, rc);
426	if (RT_FAILURE(rc2))
427	VGSvcError("Reporting session error status on open failed with rc=%Rrc\n", rc2);
428	}
429	}
430	else
431	{
432	VGSvcError("Error fetching parameters for opening guest session: %Rrc\n", rc);
433	VbglR3GuestCtrlMsgSkip(pHostCtx->uClientID, rc, UINT32_MAX);
434	}
435	VGSvcVerbose(3, "Opening a new guest session returned rc=%Rrc\n", rc);
436	return rc;
437	}
438
439
440	static int vgsvcGstCtrlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
441	{
442	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
443
444	uint32_t idSession;
445	uint32_t fFlags;
446	int rc = VbglR3GuestCtrlSessionGetClose(pHostCtx, &fFlags, &idSession);
447	if (RT_SUCCESS(rc))
448	{
449	rc = VERR_NOT_FOUND;
450
451	PVBOXSERVICECTRLSESSIONTHREAD pThread;
452	RTListForEach(&g_lstControlSessionThreads, pThread, VBOXSERVICECTRLSESSIONTHREAD, Node)
453	{
454	if (pThread->StartupInfo.uSessionID == idSession)
455	{
456	rc = VGSvcGstCtrlSessionThreadDestroy(pThread, fFlags);
457	break;
458	}
459	}
460
461	#if 0 /** @todo A bit of a mess here as this message goes to both to this process (master) and the session process. */
462	if (RT_FAILURE(rc))
463	{
464	/* Report back on failure. On success this will be done
465	* by the forked session thread. */
466	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx,
467	GUEST_SESSION_NOTIFYTYPE_ERROR, rc);
468	if (RT_FAILURE(rc2))
469	{
470	VGSvcError("Reporting session error status on close failed with rc=%Rrc\n", rc2);
471	if (RT_SUCCESS(rc))
472	rc = rc2;
473	}
474	}
475	#endif
476	VGSvcVerbose(2, "Closing guest session %RU32 returned rc=%Rrc\n", idSession, rc);
477	}
478	else
479	{
480	VGSvcError("Error fetching parameters for closing guest session: %Rrc\n", rc);
481	VbglR3GuestCtrlMsgSkip(pHostCtx->uClientID, rc, UINT32_MAX);
482	}
483	return rc;
484	}
485
486
487	/**
488	* @interface_method_impl{VBOXSERVICE,pfnStop}
489	*/
490	static DECLCALLBACK(void) vgsvcGstCtrlStop(void)
491	{
492	VGSvcVerbose(3, "Stopping ...\n");
493
494	/** @todo Later, figure what to do if we're in RTProcWait(). It's a very
495	* annoying call since doesn't support timeouts in the posix world. */
496	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
497	RTSemEventMultiSignal(g_hControlEvent);
498
499	/*
500	* Ask the host service to cancel all pending requests for the main
501	* control thread so that we can shutdown properly here.
502	*/
503	if (g_idControlSvcClient)
504	{
505	VGSvcVerbose(3, "Cancelling pending waits (client ID=%u) ...\n",
506	g_idControlSvcClient);
507
508	int rc = VbglR3GuestCtrlCancelPendingWaits(g_idControlSvcClient);
509	if (RT_FAILURE(rc))
510	VGSvcError("Cancelling pending waits failed; rc=%Rrc\n", rc);
511	}
512	}
513
514
515	/**
516	* Destroys all guest process threads which are still active.
517	*/
518	static void vgsvcGstCtrlShutdown(void)
519	{
520	VGSvcVerbose(2, "Shutting down ...\n");
521
522	int rc2 = VGSvcGstCtrlSessionThreadDestroyAll(&g_lstControlSessionThreads, 0 /* Flags */);
523	if (RT_FAILURE(rc2))
524	VGSvcError("Closing session threads failed with rc=%Rrc\n", rc2);
525
526	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
527	if (RT_FAILURE(rc2))
528	VGSvcError("Closing session failed with rc=%Rrc\n", rc2);
529
530	VGSvcVerbose(2, "Shutting down complete\n");
531	}
532
533
534	/**
535	* @interface_method_impl{VBOXSERVICE,pfnTerm}
536	*/
537	static DECLCALLBACK(void) vgsvcGstCtrlTerm(void)
538	{
539	VGSvcVerbose(3, "Terminating ...\n");
540
541	vgsvcGstCtrlShutdown();
542
543	VGSvcVerbose(3, "Disconnecting client ID=%u ...\n", g_idControlSvcClient);
544	VbglR3GuestCtrlDisconnect(g_idControlSvcClient);
545	g_idControlSvcClient = 0;
546
547	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
548	{
549	RTSemEventMultiDestroy(g_hControlEvent);
550	g_hControlEvent = NIL_RTSEMEVENTMULTI;
551	}
552	}
553
554
555	/**
556	* The 'vminfo' service description.
557	*/
558	VBOXSERVICE g_Control =
559	{
560	/* pszName. */
561	"control",
562	/* pszDescription. */
563	"Host-driven Guest Control",
564	/* pszUsage. */
565	#ifdef DEBUG
566	" [--control-dump-stderr] [--control-dump-stdout]\n"
567	#endif
568	" [--control-interval <ms>]"
569	,
570	/* pszOptions. */
571	#ifdef DEBUG
572	" --control-dump-stderr Dumps all guest proccesses stderr data to the\n"
573	" temporary directory.\n"
574	" --control-dump-stdout Dumps all guest proccesses stdout data to the\n"
575	" temporary directory.\n"
576	#endif
577	" --control-interval Specifies the interval at which to check for\n"
578	" new control messages. The default is 1000 ms.\n"
579	,
580	/* methods */
581	vgsvcGstCtrlPreInit,
582	vgsvcGstCtrlOption,
583	vgsvcGstCtrlInit,
584	vgsvcGstCtrlWorker,
585	vgsvcGstCtrlStop,
586	vgsvcGstCtrlTerm
587	};
588

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

source: vbox/trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControl.cpp@ 83958

Download in other formats: