| 1 | /** @file
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| 2 | *
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| 3 | * VirtualBox Guest Service:
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| 4 | * Linux guest.
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2006-2010 Oracle Corporation
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License (GPL) as published by the Free Software
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| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | */
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| 18 |
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| 19 | #include <sys/types.h>
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| 20 | #include <stdlib.h> /* For exit */
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| 21 | #include <stdio.h>
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| 22 | #include <string.h>
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| 23 | #include <unistd.h>
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| 24 | #include <errno.h>
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| 25 | #include <signal.h>
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| 26 |
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| 27 | #include <X11/Xlib.h>
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| 28 |
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| 29 | #include <iprt/critsect.h>
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| 30 | #include <iprt/env.h>
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| 31 | #include <iprt/initterm.h>
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| 32 | #include <iprt/message.h>
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| 33 | #include <iprt/path.h>
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| 34 | #include <iprt/param.h>
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| 35 | #include <iprt/stream.h>
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| 36 | #include <iprt/string.h>
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| 37 | #include <VBox/VBoxGuestLib.h>
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| 38 | #include <VBox/log.h>
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| 39 |
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| 40 | #include "VBoxClient.h"
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| 41 |
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| 42 | #define TRACE RTPrintf("%s: %d\n", __PRETTY_FUNCTION__, __LINE__); LogRel(("%s: %d\n", __PRETTY_FUNCTION__, __LINE__))
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| 43 |
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| 44 | static int (*gpfnOldIOErrorHandler)(Display *) = NULL;
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| 45 |
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| 46 | /** Object representing the service we are running. This has to be global
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| 47 | * so that the cleanup routine can access it. */
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| 48 | VBoxClient::Service *g_pService;
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| 49 | /** The name of our pidfile. It is global for the benefit of the cleanup
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| 50 | * routine. */
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| 51 | static char g_szPidFile[RTPATH_MAX];
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| 52 | /** The file handle of our pidfile. It is global for the benefit of the
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| 53 | * cleanup routine. */
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| 54 | static RTFILE g_hPidFile;
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| 55 | /** Global critical section used to protect the clean-up routine, which can be
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| 56 | * called from different threads.
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| 57 | */
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| 58 | RTCRITSECT g_critSect;
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| 59 |
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| 60 | /** Clean up if we get a signal or something. This is extern so that we
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| 61 | * can call it from other compilation units. */
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| 62 | void VBoxClient::CleanUp()
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| 63 | {
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| 64 | /* We never release this, as we end up with a call to exit(3) which is not
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| 65 | * async-safe. Until we fix this application properly, we should be sure
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| 66 | * never to exit from anywhere except from this method. */
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| 67 | int rc = RTCritSectEnter(&g_critSect);
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| 68 | if (RT_FAILURE(rc))
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| 69 | {
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| 70 | RTPrintf("VBoxClient: Failure while acquiring the global critical section, rc=%Rrc\n", rc);
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| 71 | abort();
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| 72 | }
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| 73 | if (g_pService)
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| 74 | g_pService->cleanup();
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| 75 | if (g_szPidFile[0] && g_hPidFile)
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| 76 | VbglR3ClosePidFile(g_szPidFile, g_hPidFile);
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| 77 | VbglR3Term();
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| 78 | exit(0);
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| 79 | }
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| 80 |
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| 81 | /**
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| 82 | * A standard signal handler which cleans up and exits.
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| 83 | */
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| 84 | void vboxClientSignalHandler(int cSignal)
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| 85 | {
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| 86 | LogRel(("VBoxClient: terminated with signal %d\n", cSignal));
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| 87 | /** Disable seamless mode */
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| 88 | RTPrintf(("VBoxClient: terminating...\n"));
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| 89 | VBoxClient::CleanUp();
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| 90 | }
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| 91 |
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| 92 | /**
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| 93 | * Xlib error handler for certain errors that we can't avoid.
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| 94 | */
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| 95 | int vboxClientXLibErrorHandler(Display *pDisplay, XErrorEvent *pError)
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| 96 | {
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| 97 | char errorText[1024];
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| 98 |
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| 99 | XGetErrorText(pDisplay, pError->error_code, errorText, sizeof(errorText));
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| 100 | LogRelFlow(("VBoxClient: an X Window protocol error occurred: %s (error code %d). Request code: %d, minor code: %d, serial number: %d\n", errorText, pError->error_code, pError->request_code, pError->minor_code, pError->serial));
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| 101 | return 0; /* We should never reach this. */
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| 102 | }
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| 103 |
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| 104 | /**
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| 105 | * Xlib error handler for fatal errors. This often means that the programme is still running
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| 106 | * when X exits.
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| 107 | */
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| 108 | static int vboxClientXLibIOErrorHandler(Display *pDisplay)
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| 109 | {
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| 110 | LogRel(("VBoxClient: a fatal guest X Window error occurred. This may just mean that the Window system was shut down while the client was still running.\n"));
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| 111 | VBoxClient::CleanUp();
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| 112 | return 0; /* We should never reach this. */
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| 113 | }
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| 114 |
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| 115 | /**
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| 116 | * Reset all standard termination signals to call our signal handler, which
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| 117 | * cleans up and exits.
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| 118 | */
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| 119 | void vboxClientSetSignalHandlers(void)
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| 120 | {
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| 121 | struct sigaction sigAction;
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| 122 |
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| 123 | LogRelFlowFunc(("\n"));
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| 124 | sigAction.sa_handler = vboxClientSignalHandler;
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| 125 | sigemptyset(&sigAction.sa_mask);
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| 126 | sigAction.sa_flags = 0;
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| 127 | sigaction(SIGHUP, &sigAction, NULL);
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| 128 | sigaction(SIGINT, &sigAction, NULL);
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| 129 | sigaction(SIGQUIT, &sigAction, NULL);
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| 130 | sigaction(SIGPIPE, &sigAction, NULL);
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| 131 | sigaction(SIGALRM, &sigAction, NULL);
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| 132 | sigaction(SIGTERM, &sigAction, NULL);
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| 133 | sigaction(SIGUSR1, &sigAction, NULL);
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| 134 | sigaction(SIGUSR2, &sigAction, NULL);
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| 135 | LogRelFlowFunc(("returning\n"));
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| 136 | }
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| 137 |
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| 138 | /**
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| 139 | * Print out a usage message and exit with success.
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| 140 | */
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| 141 | void vboxClientUsage(const char *pcszFileName)
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| 142 | {
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| 143 | RTPrintf("Usage: %s --clipboard|"
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| 144 | #ifdef VBOX_WITH_DRAG_AND_DROP
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| 145 | "--draganddrop|"
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| 146 | #endif
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| 147 | "--display|"
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| 148 | # ifdef VBOX_WITH_GUEST_PROPS
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| 149 | "--checkhostversion|"
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| 150 | #endif
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| 151 | "--seamless [-d|--nodaemon]\n", pcszFileName);
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| 152 | RTPrintf("Start the VirtualBox X Window System guest services.\n\n");
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| 153 | RTPrintf("Options:\n");
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| 154 | RTPrintf(" --clipboard start the shared clipboard service\n");
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| 155 | #ifdef VBOX_WITH_DRAG_AND_DROP
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| 156 | RTPrintf(" --draganddrop start the drag and drop service\n");
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| 157 | #endif
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| 158 | RTPrintf(" --display start the display management service\n");
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| 159 | #ifdef VBOX_WITH_GUEST_PROPS
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| 160 | RTPrintf(" --checkhostversion start the host version notifier service\n");
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| 161 | #endif
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| 162 | RTPrintf(" --seamless start the seamless windows service\n");
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| 163 | RTPrintf(" -d, --nodaemon continue running as a system service\n");
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| 164 | RTPrintf("\n");
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| 165 | exit(0);
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| 166 | }
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| 167 |
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| 168 | /**
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| 169 | * The main loop for the VBoxClient daemon.
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| 170 | */
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| 171 | int main(int argc, char *argv[])
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| 172 | {
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| 173 | /* Initialise our runtime before all else. */
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| 174 | int rc = RTR3InitExe(argc, &argv, 0);
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| 175 | if (RT_FAILURE(rc))
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| 176 | return RTMsgInitFailure(rc);
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| 177 |
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| 178 | int rcClipboard;
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| 179 | const char *pszFileName = RTPathFilename(argv[0]);
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| 180 | bool fDaemonise = true;
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| 181 | /* Have any fatal errors occurred yet? */
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| 182 | bool fSuccess = true;
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| 183 | /* Do we know which service we wish to run? */
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| 184 | bool fHaveService = false;
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| 185 |
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| 186 | if (NULL == pszFileName)
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| 187 | pszFileName = "VBoxClient";
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| 188 |
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| 189 | /* Initialise our global clean-up critical section */
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| 190 | rc = RTCritSectInit(&g_critSect);
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| 191 | if (RT_FAILURE(rc))
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| 192 | {
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| 193 | /* Of course, this should never happen. */
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| 194 | RTPrintf("%s: Failed to initialise the global critical section, rc=%Rrc\n", pszFileName, rc);
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| 195 | return 1;
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| 196 | }
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| 197 |
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| 198 | /* Parse our option(s) */
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| 199 | /** @todo Use RTGetOpt() if the arguments become more complex. */
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| 200 | for (int i = 1; i < argc; ++i)
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| 201 | {
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| 202 | if (!strcmp(argv[i], "-d") || !strcmp(argv[i], "--nodaemon"))
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| 203 | fDaemonise = false;
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| 204 | else if (!strcmp(argv[i], "--clipboard"))
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| 205 | {
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| 206 | if (g_pService == NULL)
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| 207 | g_pService = VBoxClient::GetClipboardService();
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| 208 | else
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| 209 | fSuccess = false;
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| 210 | }
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| 211 | else if (!strcmp(argv[i], "--display"))
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| 212 | {
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| 213 | if (g_pService == NULL)
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| 214 | g_pService = VBoxClient::GetDisplayService();
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| 215 | else
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| 216 | fSuccess = false;
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| 217 | }
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| 218 | else if (!strcmp(argv[i], "--seamless"))
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| 219 | {
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| 220 | if (g_pService == NULL)
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| 221 | g_pService = VBoxClient::GetSeamlessService();
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| 222 | else
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| 223 | fSuccess = false;
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| 224 | }
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| 225 | else if (!strcmp(argv[i], "--checkhostversion"))
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| 226 | {
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| 227 | if (g_pService == NULL)
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| 228 | g_pService = VBoxClient::GetHostVersionService();
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| 229 | else
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| 230 | fSuccess = false;
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| 231 | }
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| 232 | #ifdef VBOX_WITH_DRAG_AND_DROP
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| 233 | else if (!strcmp(argv[i], "--draganddrop"))
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| 234 | {
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| 235 | if (g_pService == NULL)
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| 236 | g_pService = VBoxClient::GetDragAndDropService();
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| 237 | else
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| 238 | fSuccess = false;
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| 239 | }
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| 240 | #endif /* VBOX_WITH_DRAG_AND_DROP */
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| 241 | else if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help"))
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| 242 | {
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| 243 | vboxClientUsage(pszFileName);
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| 244 | return 0;
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| 245 | }
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| 246 | else
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| 247 | {
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| 248 | RTPrintf("%s: unrecognized option `%s'\n", pszFileName, argv[i]);
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| 249 | RTPrintf("Try `%s --help' for more information\n", pszFileName);
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| 250 | return 1;
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| 251 | }
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| 252 | }
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| 253 | if (!fSuccess || !g_pService)
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| 254 | {
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| 255 | vboxClientUsage(pszFileName);
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| 256 | return 1;
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| 257 | }
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| 258 | /* Get the path for the pidfiles */
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| 259 | rc = RTPathUserHome(g_szPidFile, sizeof(g_szPidFile));
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| 260 | if (RT_FAILURE(rc))
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| 261 | {
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| 262 | RTPrintf("VBoxClient: failed to get home directory, rc=%Rrc. Exiting.\n", rc);
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| 263 | LogRel(("VBoxClient: failed to get home directory, rc=%Rrc. Exiting.\n", rc));
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| 264 | return 1;
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| 265 | }
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| 266 | rc = RTPathAppend(g_szPidFile, sizeof(g_szPidFile), g_pService->getPidFilePath());
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| 267 | if (RT_FAILURE(rc))
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| 268 | {
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| 269 | RTPrintf("VBoxClient: RTPathAppend failed with rc=%Rrc. Exiting.\n", rc);
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| 270 | LogRel(("VBoxClient: RTPathAppend failed with rc=%Rrc. Exiting.\n", rc));
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| 271 | return 1;
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| 272 | }
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| 273 |
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| 274 | /* Initialise the guest library. */
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| 275 | if (RT_FAILURE(VbglR3InitUser()))
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| 276 | {
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| 277 | RTPrintf("Failed to connect to the VirtualBox kernel service\n");
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| 278 | LogRel(("Failed to connect to the VirtualBox kernel service\n"));
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| 279 | return 1;
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| 280 | }
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| 281 | if (fDaemonise)
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| 282 | {
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| 283 | rc = VbglR3Daemonize(false /* fNoChDir */, false /* fNoClose */);
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| 284 | if (RT_FAILURE(rc))
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| 285 | {
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| 286 | RTPrintf("VBoxClient: failed to daemonize. Exiting.\n");
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| 287 | LogRel(("VBoxClient: failed to daemonize. Exiting.\n"));
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| 288 | # ifdef DEBUG
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| 289 | RTPrintf("Error %Rrc\n", rc);
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| 290 | # endif
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| 291 | return 1;
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| 292 | }
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| 293 | }
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| 294 | if (g_szPidFile[0] && RT_FAILURE(VbglR3PidFile(g_szPidFile, &g_hPidFile)))
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| 295 | {
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| 296 | RTPrintf("Failed to create a pidfile. Exiting.\n");
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| 297 | LogRel(("Failed to create a pidfile. Exiting.\n"));
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| 298 | VbglR3Term();
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| 299 | return 1;
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| 300 | }
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| 301 | /* Set signal handlers to clean up on exit. */
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| 302 | vboxClientSetSignalHandlers();
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| 303 | /* Set an X11 error handler, so that we don't die when we get unavoidable errors. */
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| 304 | XSetErrorHandler(vboxClientXLibErrorHandler);
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| 305 | /* Set an X11 I/O error handler, so that we can shutdown properly on fatal errors. */
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| 306 | XSetIOErrorHandler(vboxClientXLibIOErrorHandler);
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| 307 | g_pService->run(fDaemonise);
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| 308 | VBoxClient::CleanUp();
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| 309 | return 1; /* We should never get here. */
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| 310 | }
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