| 1 | /* $Id: display.cpp 98594 2023-02-15 16:48:37Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * X11 guest client - display management.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2023 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 | #include "VBoxClient.h"
|
|---|
| 29 |
|
|---|
| 30 | #include <iprt/errcore.h>
|
|---|
| 31 | #include <iprt/file.h>
|
|---|
| 32 | #include <iprt/mem.h>
|
|---|
| 33 | #include <iprt/string.h>
|
|---|
| 34 | #include <iprt/asm.h>
|
|---|
| 35 |
|
|---|
| 36 | #include <X11/Xlib.h>
|
|---|
| 37 | #include <X11/Xatom.h>
|
|---|
| 38 | #include <X11/extensions/Xrandr.h>
|
|---|
| 39 |
|
|---|
| 40 | /** @todo this should probably be replaced by something IPRT */
|
|---|
| 41 | /* For system() and WEXITSTATUS() */
|
|---|
| 42 | #include <stdlib.h>
|
|---|
| 43 | #include <sys/types.h>
|
|---|
| 44 | #include <sys/wait.h>
|
|---|
| 45 | #include <errno.h>
|
|---|
| 46 | #include <limits.h>
|
|---|
| 47 | #include <poll.h>
|
|---|
| 48 | #include <time.h>
|
|---|
| 49 | #include <dlfcn.h>
|
|---|
| 50 |
|
|---|
| 51 | /* TESTING: Dynamic resizing and mouse integration toggling should work
|
|---|
| 52 | * correctly with a range of X servers (pre-1.3, 1.3 and later under Linux, 1.3
|
|---|
| 53 | * and later under Solaris) with Guest Additions installed. Switching to a
|
|---|
| 54 | * virtual terminal while a user session is in place should disable dynamic
|
|---|
| 55 | * resizing and cursor integration, switching back should re-enable them. */
|
|---|
| 56 |
|
|---|
| 57 | /** State information needed for the service. The main VBoxClient code provides
|
|---|
| 58 | * the daemon logic needed by all services. */
|
|---|
| 59 | struct DISPLAYSTATE
|
|---|
| 60 | {
|
|---|
| 61 | /** Are we initialised yet? */
|
|---|
| 62 | bool mfInit;
|
|---|
| 63 | /** The connection to the server. */
|
|---|
| 64 | Display *pDisplay;
|
|---|
| 65 | /** The RandR extension base event number. */
|
|---|
| 66 | int cRREventBase;
|
|---|
| 67 | /** Can we use version 1.2 or later of the RandR protocol here? */
|
|---|
| 68 | bool fHaveRandR12;
|
|---|
| 69 | /** The command argument to use for the xrandr binary. Currently only
|
|---|
| 70 | * used to support the non-standard location on some Solaris systems -
|
|---|
| 71 | * would it make sense to use absolute paths on all systems? */
|
|---|
| 72 | const char *pcszXrandr;
|
|---|
| 73 | /** Was there a recent mode hint with no following root window resize, and
|
|---|
| 74 | * if so, have we waited for a reasonable time? */
|
|---|
| 75 | time_t timeLastModeHint;
|
|---|
| 76 | /** Handle to libXrandr. */
|
|---|
| 77 | void *pRandLibraryHandle;
|
|---|
| 78 | /** Handle to pXRRSelectInput. */
|
|---|
| 79 | void (*pXRRSelectInput) (Display *, Window, int);
|
|---|
| 80 | /** Handle to pXRRQueryExtension. */
|
|---|
| 81 | Bool (*pXRRQueryExtension) (Display *, int *, int *);
|
|---|
| 82 | };
|
|---|
| 83 |
|
|---|
| 84 | static struct DISPLAYSTATE g_DisplayState;
|
|---|
| 85 |
|
|---|
| 86 | static unsigned char *getRootProperty(struct DISPLAYSTATE *pState, const char *pszName,
|
|---|
| 87 | long cItems, Atom type)
|
|---|
| 88 | {
|
|---|
| 89 | Atom actualType = None;
|
|---|
| 90 | int iFormat = 0;
|
|---|
| 91 | unsigned long cReturned = 0;
|
|---|
| 92 | unsigned long cAfter = 0;
|
|---|
| 93 | unsigned char *pData = 0;
|
|---|
| 94 |
|
|---|
| 95 | if (XGetWindowProperty(pState->pDisplay, DefaultRootWindow(pState->pDisplay),
|
|---|
| 96 | XInternAtom(pState->pDisplay, pszName, 0), 0, cItems,
|
|---|
| 97 | False /* delete */, type, &actualType, &iFormat,
|
|---|
| 98 | &cReturned, &cAfter, &pData))
|
|---|
| 99 | return NULL;
|
|---|
| 100 | return pData;
|
|---|
| 101 | }
|
|---|
| 102 |
|
|---|
| 103 | static void doResize(struct DISPLAYSTATE *pState)
|
|---|
| 104 | {
|
|---|
| 105 | /** @note The xrandr command can fail if something else accesses RandR at
|
|---|
| 106 | * the same time. We just ignore failure for now as we do not know what
|
|---|
| 107 | * someone else is doing. */
|
|---|
| 108 | if (!pState->fHaveRandR12)
|
|---|
| 109 | {
|
|---|
| 110 | char szCommand[256];
|
|---|
| 111 | unsigned char *pData;
|
|---|
| 112 |
|
|---|
| 113 | pData = getRootProperty(pState, "VBOXVIDEO_PREFERRED_MODE", 1, XA_INTEGER);
|
|---|
| 114 | if (pData != NULL)
|
|---|
| 115 | {
|
|---|
| 116 | RTStrPrintf(szCommand, sizeof(szCommand), "%s -s %ux%u",
|
|---|
| 117 | pState->pcszXrandr, ((unsigned long *)pData)[0] >> 16, ((unsigned long *)pData)[0] & 0xFFFF);
|
|---|
| 118 | int rcShutUpGcc = system(szCommand); RT_NOREF_PV(rcShutUpGcc);
|
|---|
| 119 | XFree(pData);
|
|---|
| 120 | }
|
|---|
| 121 | }
|
|---|
| 122 | else
|
|---|
| 123 | {
|
|---|
| 124 | const char szCommandBase[] =
|
|---|
| 125 | "%s --output VGA-0 --auto --output VGA-1 --auto --right-of VGA-0 "
|
|---|
| 126 | "--output VGA-2 --auto --right-of VGA-1 --output VGA-3 --auto --right-of VGA-2 "
|
|---|
| 127 | "--output VGA-4 --auto --right-of VGA-3 --output VGA-5 --auto --right-of VGA-4 "
|
|---|
| 128 | "--output VGA-6 --auto --right-of VGA-5 --output VGA-7 --auto --right-of VGA-6 "
|
|---|
| 129 | "--output VGA-8 --auto --right-of VGA-7 --output VGA-9 --auto --right-of VGA-8 "
|
|---|
| 130 | "--output VGA-10 --auto --right-of VGA-9 --output VGA-11 --auto --right-of VGA-10 "
|
|---|
| 131 | "--output VGA-12 --auto --right-of VGA-11 --output VGA-13 --auto --right-of VGA-12 "
|
|---|
| 132 | "--output VGA-14 --auto --right-of VGA-13 --output VGA-15 --auto --right-of VGA-14 "
|
|---|
| 133 | "--output VGA-16 --auto --right-of VGA-15 --output VGA-17 --auto --right-of VGA-16 "
|
|---|
| 134 | "--output VGA-18 --auto --right-of VGA-17 --output VGA-19 --auto --right-of VGA-18 "
|
|---|
| 135 | "--output VGA-20 --auto --right-of VGA-19 --output VGA-21 --auto --right-of VGA-20 "
|
|---|
| 136 | "--output VGA-22 --auto --right-of VGA-21 --output VGA-23 --auto --right-of VGA-22 "
|
|---|
| 137 | "--output VGA-24 --auto --right-of VGA-23 --output VGA-25 --auto --right-of VGA-24 "
|
|---|
| 138 | "--output VGA-26 --auto --right-of VGA-25 --output VGA-27 --auto --right-of VGA-26 "
|
|---|
| 139 | "--output VGA-28 --auto --right-of VGA-27 --output VGA-29 --auto --right-of VGA-28 "
|
|---|
| 140 | "--output VGA-30 --auto --right-of VGA-29 --output VGA-31 --auto --right-of VGA-30";
|
|---|
| 141 | char szCommand[sizeof(szCommandBase) + 256];
|
|---|
| 142 | RTStrPrintf(szCommand, sizeof(szCommand), szCommandBase, pState->pcszXrandr);
|
|---|
| 143 | int rcShutUpGcc = system(szCommand); RT_NOREF_PV(rcShutUpGcc);
|
|---|
| 144 | }
|
|---|
| 145 | }
|
|---|
| 146 |
|
|---|
| 147 | /** Main loop: handle display hot-plug events, property updates (which can
|
|---|
| 148 | * signal VT switches hot-plug in old X servers). */
|
|---|
| 149 | static void runDisplay(struct DISPLAYSTATE *pState, bool volatile *pfShutdown)
|
|---|
| 150 | {
|
|---|
| 151 | Display *pDisplay = pState->pDisplay;
|
|---|
| 152 | long cValue = 1;
|
|---|
| 153 |
|
|---|
| 154 | /* One way or another we want the preferred mode at server start-up. */
|
|---|
| 155 | doResize(pState);
|
|---|
| 156 | XSelectInput(pDisplay, DefaultRootWindow(pDisplay), PropertyChangeMask | StructureNotifyMask);
|
|---|
| 157 | if (pState->fHaveRandR12)
|
|---|
| 158 | pState->pXRRSelectInput(pDisplay, DefaultRootWindow(pDisplay), RRScreenChangeNotifyMask);
|
|---|
| 159 | /* Semantics: when VBOXCLIENT_STARTED is set, pre-1.3 X.Org Server driver
|
|---|
| 160 | * assumes that a client capable of handling mode hints will be present for the
|
|---|
| 161 | * rest of the X session. If we crash things will not work as they should.
|
|---|
| 162 | * I thought that preferable to implementing complex crash-handling logic.
|
|---|
| 163 | */
|
|---|
| 164 | XChangeProperty(pState->pDisplay, DefaultRootWindow(pState->pDisplay), XInternAtom(pState->pDisplay, "VBOXCLIENT_STARTED", 0),
|
|---|
| 165 | XA_INTEGER, 32, PropModeReplace, (unsigned char *)&cValue, 1);
|
|---|
| 166 | /* Interrupting this cleanly will be more work than making it robust
|
|---|
| 167 | * against spontaneous termination, especially as it will never get
|
|---|
| 168 | * properly tested, so I will go for the second. */
|
|---|
| 169 | while (!ASMAtomicReadBool(pfShutdown))
|
|---|
| 170 | {
|
|---|
| 171 | XEvent event;
|
|---|
| 172 | struct pollfd PollFd;
|
|---|
| 173 | int pollTimeOut = -1;
|
|---|
| 174 | int cFds;
|
|---|
| 175 |
|
|---|
| 176 | /* Do not handle overflow. */
|
|---|
| 177 | if (pState->timeLastModeHint > 0 && pState->timeLastModeHint < INT_MAX - 2)
|
|---|
| 178 | pollTimeOut = 2 - (time(0) - pState->timeLastModeHint);
|
|---|
| 179 | PollFd.fd = ConnectionNumber(pDisplay);
|
|---|
| 180 | PollFd.events = POLLIN; /* Hang-up is always reported. */
|
|---|
| 181 | XFlush(pDisplay);
|
|---|
| 182 | cFds = poll(&PollFd, 1, pollTimeOut >= 0 ? pollTimeOut * 1000 : -1);
|
|---|
| 183 | while (XPending(pDisplay))
|
|---|
| 184 | {
|
|---|
| 185 | XNextEvent(pDisplay, &event);
|
|---|
| 186 | /* This property is deleted when the server regains the virtual
|
|---|
| 187 | * terminal. Force the main thread to call xrandr again, as old X
|
|---|
| 188 | * servers could not handle it while switched out. */
|
|---|
| 189 | if ( !pState->fHaveRandR12
|
|---|
| 190 | && event.type == PropertyNotify
|
|---|
| 191 | && event.xproperty.state == PropertyDelete
|
|---|
| 192 | && event.xproperty.window == DefaultRootWindow(pDisplay)
|
|---|
| 193 | && event.xproperty.atom == XInternAtom(pDisplay, "VBOXVIDEO_NO_VT", False))
|
|---|
| 194 | doResize(pState);
|
|---|
| 195 | if ( !pState->fHaveRandR12
|
|---|
| 196 | && event.type == PropertyNotify
|
|---|
| 197 | && event.xproperty.state == PropertyNewValue
|
|---|
| 198 | && event.xproperty.window == DefaultRootWindow(pDisplay)
|
|---|
| 199 | && event.xproperty.atom == XInternAtom(pDisplay, "VBOXVIDEO_PREFERRED_MODE", False))
|
|---|
| 200 | doResize(pState);
|
|---|
| 201 | if ( pState->fHaveRandR12
|
|---|
| 202 | && event.type == pState->cRREventBase + RRScreenChangeNotify)
|
|---|
| 203 | pState->timeLastModeHint = time(0);
|
|---|
| 204 | if ( event.type == ConfigureNotify
|
|---|
| 205 | && event.xproperty.window == DefaultRootWindow(pDisplay))
|
|---|
| 206 | pState->timeLastModeHint = 0;
|
|---|
| 207 | }
|
|---|
| 208 | if (cFds == 0 && pState->timeLastModeHint > 0)
|
|---|
| 209 | doResize(pState);
|
|---|
| 210 | }
|
|---|
| 211 | }
|
|---|
| 212 |
|
|---|
| 213 | static int initDisplay(struct DISPLAYSTATE *pState)
|
|---|
| 214 | {
|
|---|
| 215 | char szCommand[256];
|
|---|
| 216 | int status;
|
|---|
| 217 |
|
|---|
| 218 | pState->pRandLibraryHandle = dlopen("libXrandr.so", RTLD_LAZY /*| RTLD_LOCAL */);
|
|---|
| 219 | if (!pState->pRandLibraryHandle)
|
|---|
| 220 | pState->pRandLibraryHandle = dlopen("libXrandr.so.2", RTLD_LAZY /*| RTLD_LOCAL */);
|
|---|
| 221 | if (!pState->pRandLibraryHandle)
|
|---|
| 222 | pState->pRandLibraryHandle = dlopen("libXrandr.so.2.2.0", RTLD_LAZY /*| RTLD_LOCAL */);
|
|---|
| 223 |
|
|---|
| 224 | if (!RT_VALID_PTR(pState->pRandLibraryHandle))
|
|---|
| 225 | {
|
|---|
| 226 | VBClLogFatalError("Could not locate libXrandr for dlopen\n");
|
|---|
| 227 | return VERR_NOT_FOUND;
|
|---|
| 228 | }
|
|---|
| 229 |
|
|---|
| 230 | *(void **)(&pState->pXRRSelectInput) = dlsym(pState->pRandLibraryHandle, "XRRSelectInput");
|
|---|
| 231 | *(void **)(&pState->pXRRQueryExtension) = dlsym(pState->pRandLibraryHandle, "XRRQueryExtension");
|
|---|
| 232 |
|
|---|
| 233 | if ( !RT_VALID_PTR(pState->pXRRSelectInput)
|
|---|
| 234 | || !RT_VALID_PTR(pState->pXRRQueryExtension))
|
|---|
| 235 | {
|
|---|
| 236 | VBClLogFatalError("Could not load required libXrandr symbols\n");
|
|---|
| 237 | dlclose(pState->pRandLibraryHandle);
|
|---|
| 238 | pState->pRandLibraryHandle = NULL;
|
|---|
| 239 | return VERR_NOT_FOUND;
|
|---|
| 240 | }
|
|---|
| 241 |
|
|---|
| 242 | pState->pDisplay = XOpenDisplay(NULL);
|
|---|
| 243 | if (!pState->pDisplay)
|
|---|
| 244 | return VERR_NOT_FOUND;
|
|---|
| 245 | if (!pState->pXRRQueryExtension(pState->pDisplay, &pState->cRREventBase, &status))
|
|---|
| 246 | return VERR_NOT_FOUND;
|
|---|
| 247 | pState->fHaveRandR12 = false;
|
|---|
| 248 | pState->pcszXrandr = "xrandr";
|
|---|
| 249 | if (RTFileExists("/usr/X11/bin/xrandr"))
|
|---|
| 250 | pState->pcszXrandr = "/usr/X11/bin/xrandr";
|
|---|
| 251 | status = system(pState->pcszXrandr);
|
|---|
| 252 | if (WEXITSTATUS(status) != 0) /* Utility or extension not available. */
|
|---|
| 253 | VBClLogFatalError("Failed to execute the xrandr utility\n");
|
|---|
| 254 | RTStrPrintf(szCommand, sizeof(szCommand), "%s --q12", pState->pcszXrandr);
|
|---|
| 255 | status = system(szCommand);
|
|---|
| 256 | if (WEXITSTATUS(status) == 0)
|
|---|
| 257 | pState->fHaveRandR12 = true;
|
|---|
| 258 | return VINF_SUCCESS;
|
|---|
| 259 | }
|
|---|
| 260 |
|
|---|
| 261 | /**
|
|---|
| 262 | * @interface_method_impl{VBCLSERVICE,pfnInit}
|
|---|
| 263 | */
|
|---|
| 264 | static DECLCALLBACK(int) init(void)
|
|---|
| 265 | {
|
|---|
| 266 | struct DISPLAYSTATE *pSelf = &g_DisplayState;
|
|---|
| 267 | int rc;
|
|---|
| 268 |
|
|---|
| 269 | if (pSelf->mfInit)
|
|---|
| 270 | return VERR_WRONG_ORDER;
|
|---|
| 271 | rc = initDisplay(pSelf);
|
|---|
| 272 | if (RT_FAILURE(rc))
|
|---|
| 273 | return rc;
|
|---|
| 274 | if (RT_SUCCESS(rc))
|
|---|
| 275 | pSelf->mfInit = true;
|
|---|
| 276 | return rc;
|
|---|
| 277 | }
|
|---|
| 278 |
|
|---|
| 279 | /**
|
|---|
| 280 | * @interface_method_impl{VBCLSERVICE,pfnWorker}
|
|---|
| 281 | */
|
|---|
| 282 | static DECLCALLBACK(int) run(bool volatile *pfShutdown)
|
|---|
| 283 | {
|
|---|
| 284 | struct DISPLAYSTATE *pSelf = &g_DisplayState;
|
|---|
| 285 |
|
|---|
| 286 | if (!pSelf->mfInit)
|
|---|
| 287 | return VERR_WRONG_ORDER;
|
|---|
| 288 |
|
|---|
| 289 | runDisplay(pSelf, pfShutdown);
|
|---|
| 290 |
|
|---|
| 291 | return VINF_SUCCESS;
|
|---|
| 292 | }
|
|---|
| 293 |
|
|---|
| 294 | /**
|
|---|
| 295 | * @interface_method_impl{VBCLSERVICE,pfnStop}
|
|---|
| 296 | */
|
|---|
| 297 | static DECLCALLBACK(void) stop(void)
|
|---|
| 298 | {
|
|---|
| 299 | /* Nothing to do here. Implement empty callback, so
|
|---|
| 300 | * main thread can set pfShutdown=true on process termination. */
|
|---|
| 301 | }
|
|---|
| 302 |
|
|---|
| 303 | VBCLSERVICE g_SvcDisplayLegacy =
|
|---|
| 304 | {
|
|---|
| 305 | "dp-legacy-x11", /* szName */
|
|---|
| 306 | "Legacy display assistant", /* pszDescription */
|
|---|
| 307 | ".vboxclient-display", /* pszPidFilePathTemplate */
|
|---|
| 308 | NULL, /* pszUsage */
|
|---|
| 309 | NULL, /* pszOptions */
|
|---|
| 310 | NULL, /* pfnOption */
|
|---|
| 311 | init, /* pfnInit */
|
|---|
| 312 | run, /* pfnWorker */
|
|---|
| 313 | stop, /* pfnStop */
|
|---|
| 314 | NULL, /* pfnTerm */
|
|---|
| 315 | };
|
|---|
