| 1 | /* $Id: display.cpp 69500 2017-10-28 15:14:05Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * X11 guest client - display management.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2017 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 | #include "VBoxClient.h"
|
|---|
| 19 |
|
|---|
| 20 | #include <iprt/err.h>
|
|---|
| 21 | #include <iprt/file.h>
|
|---|
| 22 | #include <iprt/mem.h>
|
|---|
| 23 | #include <iprt/string.h>
|
|---|
| 24 |
|
|---|
| 25 | #include <X11/Xlib.h>
|
|---|
| 26 | #include <X11/Xatom.h>
|
|---|
| 27 | #include <X11/extensions/Xrandr.h>
|
|---|
| 28 |
|
|---|
| 29 | /** @todo this should probably be replaced by something IPRT */
|
|---|
| 30 | /* For system() and WEXITSTATUS() */
|
|---|
| 31 | #include <stdlib.h>
|
|---|
| 32 | #include <sys/types.h>
|
|---|
| 33 | #include <sys/wait.h>
|
|---|
| 34 | #include <errno.h>
|
|---|
| 35 | #include <limits.h>
|
|---|
| 36 | #include <poll.h>
|
|---|
| 37 | #include <time.h>
|
|---|
| 38 |
|
|---|
| 39 | /* TESTING: Dynamic resizing and mouse integration toggling should work
|
|---|
| 40 | * correctly with a range of X servers (pre-1.3, 1.3 and later under Linux, 1.3
|
|---|
| 41 | * and later under Solaris) with Guest Additions installed. Switching to a
|
|---|
| 42 | * virtual terminal while a user session is in place should disable dynamic
|
|---|
| 43 | * resizing and cursor integration, switching back should re-enable them. */
|
|---|
| 44 |
|
|---|
| 45 | /** Display magic number, start of a UUID. */
|
|---|
| 46 | #define DISPLAYSTATE_MAGIC UINT32_C(0xf0029993)
|
|---|
| 47 |
|
|---|
| 48 | /** State information needed for the service. The main VBoxClient code provides
|
|---|
| 49 | * the daemon logic needed by all services. */
|
|---|
| 50 | struct DISPLAYSTATE
|
|---|
| 51 | {
|
|---|
| 52 | /** The service interface. */
|
|---|
| 53 | struct VBCLSERVICE *pInterface;
|
|---|
| 54 | /** Magic number for sanity checks. */
|
|---|
| 55 | uint32_t magic;
|
|---|
| 56 | /** Are we initialised yet? */
|
|---|
| 57 | bool mfInit;
|
|---|
| 58 | /** The connection to the server. */
|
|---|
| 59 | Display *pDisplay;
|
|---|
| 60 | /** The RandR extension base event number. */
|
|---|
| 61 | int cRREventBase;
|
|---|
| 62 | /** Can we use version 1.2 or later of the RandR protocol here? */
|
|---|
| 63 | bool fHaveRandR12;
|
|---|
| 64 | /** The command argument to use for the xrandr binary. Currently only
|
|---|
| 65 | * used to support the non-standard location on some Solaris systems -
|
|---|
| 66 | * would it make sense to use absolute paths on all systems? */
|
|---|
| 67 | const char *pcszXrandr;
|
|---|
| 68 | /** Was there a recent mode hint with no following root window resize, and
|
|---|
| 69 | * if so, have we waited for a reasonable time? */
|
|---|
| 70 | time_t timeLastModeHint;
|
|---|
| 71 | };
|
|---|
| 72 |
|
|---|
| 73 | static unsigned char *getRootProperty(struct DISPLAYSTATE *pState, const char *pszName,
|
|---|
| 74 | long cItems, Atom type)
|
|---|
| 75 | {
|
|---|
| 76 | Atom actualType = None;
|
|---|
| 77 | int iFormat = 0;
|
|---|
| 78 | unsigned long cReturned = 0;
|
|---|
| 79 | unsigned long cAfter = 0;
|
|---|
| 80 | unsigned char *pData = 0;
|
|---|
| 81 |
|
|---|
| 82 | if (XGetWindowProperty(pState->pDisplay, DefaultRootWindow(pState->pDisplay),
|
|---|
| 83 | XInternAtom(pState->pDisplay, pszName, 0), 0, cItems,
|
|---|
| 84 | False /* delete */, type, &actualType, &iFormat,
|
|---|
| 85 | &cReturned, &cAfter, &pData))
|
|---|
| 86 | return NULL;
|
|---|
| 87 | return pData;
|
|---|
| 88 | }
|
|---|
| 89 |
|
|---|
| 90 | static void doResize(struct DISPLAYSTATE *pState)
|
|---|
| 91 | {
|
|---|
| 92 | /** @note The xrandr command can fail if something else accesses RandR at
|
|---|
| 93 | * the same time. We just ignore failure for now as we do not know what
|
|---|
| 94 | * someone else is doing. */
|
|---|
| 95 | if (!pState->fHaveRandR12)
|
|---|
| 96 | {
|
|---|
| 97 | char szCommand[256];
|
|---|
| 98 | unsigned char *pData;
|
|---|
| 99 |
|
|---|
| 100 | pData = getRootProperty(pState, "VBOXVIDEO_PREFERRED_MODE", 1, XA_INTEGER);
|
|---|
| 101 | if (pData != NULL)
|
|---|
| 102 | {
|
|---|
| 103 | RTStrPrintf(szCommand, sizeof(szCommand), "%s -s %ux%u",
|
|---|
| 104 | pState->pcszXrandr, ((unsigned long *)pData)[0] >> 16, ((unsigned long *)pData)[0] & 0xFFFF);
|
|---|
| 105 | int rcShutUpGcc = system(szCommand); RT_NOREF_PV(rcShutUpGcc);
|
|---|
| 106 | XFree(pData);
|
|---|
| 107 | }
|
|---|
| 108 | }
|
|---|
| 109 | else
|
|---|
| 110 | {
|
|---|
| 111 | const char szCommandBase[] =
|
|---|
| 112 | "%s --output VGA-0 --auto --output VGA-1 --auto --right-of VGA-0 "
|
|---|
| 113 | "--output VGA-2 --auto --right-of VGA-1 --output VGA-3 --auto --right-of VGA-2 "
|
|---|
| 114 | "--output VGA-4 --auto --right-of VGA-3 --output VGA-5 --auto --right-of VGA-4 "
|
|---|
| 115 | "--output VGA-6 --auto --right-of VGA-5 --output VGA-7 --auto --right-of VGA-6 "
|
|---|
| 116 | "--output VGA-8 --auto --right-of VGA-7 --output VGA-9 --auto --right-of VGA-8 "
|
|---|
| 117 | "--output VGA-10 --auto --right-of VGA-9 --output VGA-11 --auto --right-of VGA-10 "
|
|---|
| 118 | "--output VGA-12 --auto --right-of VGA-11 --output VGA-13 --auto --right-of VGA-12 "
|
|---|
| 119 | "--output VGA-14 --auto --right-of VGA-13 --output VGA-15 --auto --right-of VGA-14 "
|
|---|
| 120 | "--output VGA-16 --auto --right-of VGA-15 --output VGA-17 --auto --right-of VGA-16 "
|
|---|
| 121 | "--output VGA-18 --auto --right-of VGA-17 --output VGA-19 --auto --right-of VGA-18 "
|
|---|
| 122 | "--output VGA-20 --auto --right-of VGA-19 --output VGA-21 --auto --right-of VGA-20 "
|
|---|
| 123 | "--output VGA-22 --auto --right-of VGA-21 --output VGA-23 --auto --right-of VGA-22 "
|
|---|
| 124 | "--output VGA-24 --auto --right-of VGA-23 --output VGA-25 --auto --right-of VGA-24 "
|
|---|
| 125 | "--output VGA-26 --auto --right-of VGA-25 --output VGA-27 --auto --right-of VGA-26 "
|
|---|
| 126 | "--output VGA-28 --auto --right-of VGA-27 --output VGA-29 --auto --right-of VGA-28 "
|
|---|
| 127 | "--output VGA-30 --auto --right-of VGA-29 --output VGA-31 --auto --right-of VGA-30";
|
|---|
| 128 | char szCommand[sizeof(szCommandBase) + 256];
|
|---|
| 129 | RTStrPrintf(szCommand, sizeof(szCommand), szCommandBase, pState->pcszXrandr);
|
|---|
| 130 | int rcShutUpGcc = system(szCommand); RT_NOREF_PV(rcShutUpGcc);
|
|---|
| 131 | }
|
|---|
| 132 | }
|
|---|
| 133 |
|
|---|
| 134 | /** Main loop: handle display hot-plug events, property updates (which can
|
|---|
| 135 | * signal VT switches hot-plug in old X servers). */
|
|---|
| 136 | static void runDisplay(struct DISPLAYSTATE *pState)
|
|---|
| 137 | {
|
|---|
| 138 | Display *pDisplay = pState->pDisplay;
|
|---|
| 139 | long cValue = 1;
|
|---|
| 140 |
|
|---|
| 141 | /* One way or another we want the preferred mode at server start-up. */
|
|---|
| 142 | doResize(pState);
|
|---|
| 143 | XSelectInput(pDisplay, DefaultRootWindow(pDisplay), PropertyChangeMask | StructureNotifyMask);
|
|---|
| 144 | if (pState->fHaveRandR12)
|
|---|
| 145 | XRRSelectInput(pDisplay, DefaultRootWindow(pDisplay), RRScreenChangeNotifyMask);
|
|---|
| 146 | /* Semantics: when VBOXCLIENT_STARTED is set, pre-1.3 X.Org Server driver
|
|---|
| 147 | * assumes that a client capable of handling mode hints will be present for the
|
|---|
| 148 | * rest of the X session. If we crash things will not work as they should.
|
|---|
| 149 | * I thought that preferable to implementing complex crash-handling logic.
|
|---|
| 150 | */
|
|---|
| 151 | XChangeProperty(pState->pDisplay, DefaultRootWindow(pState->pDisplay), XInternAtom(pState->pDisplay, "VBOXCLIENT_STARTED", 0),
|
|---|
| 152 | XA_INTEGER, 32, PropModeReplace, (unsigned char *)&cValue, 1);
|
|---|
| 153 | /* Interrupting this cleanly will be more work than making it robust
|
|---|
| 154 | * against spontaneous termination, especially as it will never get
|
|---|
| 155 | * properly tested, so I will go for the second. */
|
|---|
| 156 | while (true)
|
|---|
| 157 | {
|
|---|
| 158 | XEvent event;
|
|---|
| 159 | struct pollfd PollFd;
|
|---|
| 160 | int pollTimeOut = -1;
|
|---|
| 161 | int cFds;
|
|---|
| 162 |
|
|---|
| 163 | /* Do not handle overflow. */
|
|---|
| 164 | if (pState->timeLastModeHint > 0 && pState->timeLastModeHint < INT_MAX - 2)
|
|---|
| 165 | pollTimeOut = 2 - (time(0) - pState->timeLastModeHint);
|
|---|
| 166 | PollFd.fd = ConnectionNumber(pDisplay);
|
|---|
| 167 | PollFd.events = POLLIN; /* Hang-up is always reported. */
|
|---|
| 168 | XFlush(pDisplay);
|
|---|
| 169 | cFds = poll(&PollFd, 1, pollTimeOut >= 0 ? pollTimeOut * 1000 : -1);
|
|---|
| 170 | while (XPending(pDisplay))
|
|---|
| 171 | {
|
|---|
| 172 | XNextEvent(pDisplay, &event);
|
|---|
| 173 | /* This property is deleted when the server regains the virtual
|
|---|
| 174 | * terminal. Force the main thread to call xrandr again, as old X
|
|---|
| 175 | * servers could not handle it while switched out. */
|
|---|
| 176 | if ( !pState->fHaveRandR12
|
|---|
| 177 | && event.type == PropertyNotify
|
|---|
| 178 | && event.xproperty.state == PropertyDelete
|
|---|
| 179 | && event.xproperty.window == DefaultRootWindow(pDisplay)
|
|---|
| 180 | && event.xproperty.atom == XInternAtom(pDisplay, "VBOXVIDEO_NO_VT", False))
|
|---|
| 181 | doResize(pState);
|
|---|
| 182 | if ( !pState->fHaveRandR12
|
|---|
| 183 | && event.type == PropertyNotify
|
|---|
| 184 | && event.xproperty.state == PropertyNewValue
|
|---|
| 185 | && event.xproperty.window == DefaultRootWindow(pDisplay)
|
|---|
| 186 | && event.xproperty.atom == XInternAtom(pDisplay, "VBOXVIDEO_PREFERRED_MODE", False))
|
|---|
| 187 | doResize(pState);
|
|---|
| 188 | if ( pState->fHaveRandR12
|
|---|
| 189 | && event.type == pState->cRREventBase + RRScreenChangeNotify)
|
|---|
| 190 | pState->timeLastModeHint = time(0);
|
|---|
| 191 | if ( event.type == ConfigureNotify
|
|---|
| 192 | && event.xproperty.window == DefaultRootWindow(pDisplay))
|
|---|
| 193 | pState->timeLastModeHint = 0;
|
|---|
| 194 | }
|
|---|
| 195 | if (cFds == 0 && pState->timeLastModeHint > 0)
|
|---|
| 196 | doResize(pState);
|
|---|
| 197 | }
|
|---|
| 198 | }
|
|---|
| 199 |
|
|---|
| 200 | static int initDisplay(struct DISPLAYSTATE *pState)
|
|---|
| 201 | {
|
|---|
| 202 | char szCommand[256];
|
|---|
| 203 | int status;
|
|---|
| 204 |
|
|---|
| 205 | pState->pDisplay = XOpenDisplay(NULL);
|
|---|
| 206 | if (!pState->pDisplay)
|
|---|
| 207 | return VERR_NOT_FOUND;
|
|---|
| 208 | if (!XRRQueryExtension(pState->pDisplay, &pState->cRREventBase, &status))
|
|---|
| 209 | return VERR_NOT_FOUND;
|
|---|
| 210 | pState->fHaveRandR12 = false;
|
|---|
| 211 | pState->pcszXrandr = "xrandr";
|
|---|
| 212 | if (RTFileExists("/usr/X11/bin/xrandr"))
|
|---|
| 213 | pState->pcszXrandr = "/usr/X11/bin/xrandr";
|
|---|
| 214 | status = system(pState->pcszXrandr);
|
|---|
| 215 | if (WEXITSTATUS(status) != 0) /* Utility or extension not available. */
|
|---|
| 216 | VBClFatalError(("Failed to execute the xrandr utility.\n"));
|
|---|
| 217 | RTStrPrintf(szCommand, sizeof(szCommand), "%s --q12", pState->pcszXrandr);
|
|---|
| 218 | status = system(szCommand);
|
|---|
| 219 | if (WEXITSTATUS(status) == 0)
|
|---|
| 220 | pState->fHaveRandR12 = true;
|
|---|
| 221 | return VINF_SUCCESS;
|
|---|
| 222 | }
|
|---|
| 223 |
|
|---|
| 224 | static const char *getPidFilePath()
|
|---|
| 225 | {
|
|---|
| 226 | return ".vboxclient-display.pid";
|
|---|
| 227 | }
|
|---|
| 228 |
|
|---|
| 229 | static struct DISPLAYSTATE *getStateFromInterface(struct VBCLSERVICE **ppInterface)
|
|---|
| 230 | {
|
|---|
| 231 | struct DISPLAYSTATE *pSelf = (struct DISPLAYSTATE *)ppInterface;
|
|---|
| 232 | if (pSelf->magic != DISPLAYSTATE_MAGIC)
|
|---|
| 233 | VBClFatalError(("Bad display service object!\n"));
|
|---|
| 234 | return pSelf;
|
|---|
| 235 | }
|
|---|
| 236 |
|
|---|
| 237 | static int init(struct VBCLSERVICE **ppInterface)
|
|---|
| 238 | {
|
|---|
| 239 | struct DISPLAYSTATE *pSelf = getStateFromInterface(ppInterface);
|
|---|
| 240 | int rc;
|
|---|
| 241 |
|
|---|
| 242 | if (pSelf->mfInit)
|
|---|
| 243 | return VERR_WRONG_ORDER;
|
|---|
| 244 | rc = initDisplay(pSelf);
|
|---|
| 245 | if (RT_FAILURE(rc))
|
|---|
| 246 | return rc;
|
|---|
| 247 | if (RT_SUCCESS(rc))
|
|---|
| 248 | pSelf->mfInit = true;
|
|---|
| 249 | return rc;
|
|---|
| 250 | }
|
|---|
| 251 |
|
|---|
| 252 | static int run(struct VBCLSERVICE **ppInterface, bool fDaemonised)
|
|---|
| 253 | {
|
|---|
| 254 | RT_NOREF1(fDaemonised);
|
|---|
| 255 | struct DISPLAYSTATE *pSelf = getStateFromInterface(ppInterface);
|
|---|
| 256 |
|
|---|
| 257 | if (!pSelf->mfInit)
|
|---|
| 258 | return VERR_WRONG_ORDER;
|
|---|
| 259 | runDisplay(pSelf);
|
|---|
| 260 | return VERR_INTERNAL_ERROR; /* "Should never reach here." */
|
|---|
| 261 | }
|
|---|
| 262 |
|
|---|
| 263 | struct VBCLSERVICE vbclDisplayInterface =
|
|---|
| 264 | {
|
|---|
| 265 | getPidFilePath,
|
|---|
| 266 | init,
|
|---|
| 267 | run,
|
|---|
| 268 | VBClServiceDefaultCleanup
|
|---|
| 269 | };
|
|---|
| 270 |
|
|---|
| 271 | struct VBCLSERVICE **VBClGetDisplayService()
|
|---|
| 272 | {
|
|---|
| 273 | struct DISPLAYSTATE *pService = (struct DISPLAYSTATE *)RTMemAlloc(sizeof(*pService));
|
|---|
| 274 |
|
|---|
| 275 | if (!pService)
|
|---|
| 276 | VBClFatalError(("Out of memory\n"));
|
|---|
| 277 | pService->pInterface = &vbclDisplayInterface;
|
|---|
| 278 | pService->magic = DISPLAYSTATE_MAGIC;
|
|---|
| 279 | pService->mfInit = false;
|
|---|
| 280 | return &pService->pInterface;
|
|---|
| 281 | }
|
|---|
