| 1 | /** @file
|
|---|
| 2 | *
|
|---|
| 3 | * Module to dynamically load libhal and libdbus and load all symbols
|
|---|
| 4 | * which are needed by VirtualBox.
|
|---|
| 5 | */
|
|---|
| 6 |
|
|---|
| 7 | /*
|
|---|
| 8 | * Copyright (C) 2006-2010 Oracle Corporation
|
|---|
| 9 | *
|
|---|
| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 11 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 12 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 13 | * General Public License (GPL) as published by the Free Software
|
|---|
| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 17 | */
|
|---|
| 18 |
|
|---|
| 19 | #include "vbox-libhal.h"
|
|---|
| 20 |
|
|---|
| 21 | #include <iprt/err.h>
|
|---|
| 22 | #include <iprt/ldr.h>
|
|---|
| 23 |
|
|---|
| 24 | /**
|
|---|
| 25 | * Whether we have tried to load libdbus and libhal yet. This flag should only be set
|
|---|
| 26 | * to "true" after we have either loaded both libraries and all symbols which we need,
|
|---|
| 27 | * or failed to load something and unloaded and set back to zero pLibDBus and pLibHal.
|
|---|
| 28 | */
|
|---|
| 29 | static bool gCheckedForLibHal = false;
|
|---|
| 30 | /**
|
|---|
| 31 | * Pointer to the libhal shared object. This should only be set once all needed libraries
|
|---|
| 32 | * and symbols have been successfully loaded.
|
|---|
| 33 | */
|
|---|
| 34 | static RTLDRMOD ghLibHal = 0;
|
|---|
| 35 |
|
|---|
| 36 | /** The following are the symbols which we need from libdbus and libhal. */
|
|---|
| 37 | void (*gDBusErrorInit)(DBusError *);
|
|---|
| 38 | DBusConnection *(*gDBusBusGet)(DBusBusType, DBusError *);
|
|---|
| 39 | void (*gDBusErrorFree)(DBusError *);
|
|---|
| 40 | void (*gDBusConnectionUnref)(DBusConnection *);
|
|---|
| 41 | LibHalContext *(*gLibHalCtxNew)(void);
|
|---|
| 42 | dbus_bool_t (*gLibHalCtxSetDBusConnection)(LibHalContext *, DBusConnection *);
|
|---|
| 43 | dbus_bool_t (*gLibHalCtxInit)(LibHalContext *, DBusError *);
|
|---|
| 44 | char **(*gLibHalFindDeviceStringMatch)(LibHalContext *, const char *, const char *, int *,
|
|---|
| 45 | DBusError *);
|
|---|
| 46 | char *(*gLibHalDeviceGetPropertyString)(LibHalContext *, const char *, const char *, DBusError *);
|
|---|
| 47 | void (*gLibHalFreeString)(char *);
|
|---|
| 48 | void (*gLibHalFreeStringArray)(char **);
|
|---|
| 49 | dbus_bool_t (*gLibHalCtxShutdown)(LibHalContext *, DBusError *);
|
|---|
| 50 | dbus_bool_t (*gLibHalCtxFree)(LibHalContext *);
|
|---|
| 51 |
|
|---|
| 52 | bool gLibHalCheckPresence(void)
|
|---|
| 53 | {
|
|---|
| 54 | RTLDRMOD hLibHal;
|
|---|
| 55 |
|
|---|
| 56 | if (ghLibHal != 0 && gCheckedForLibHal == true)
|
|---|
| 57 | return true;
|
|---|
| 58 | if (gCheckedForLibHal == true)
|
|---|
| 59 | return false;
|
|---|
| 60 | if (!RT_SUCCESS(RTLdrLoad(LIB_HAL, &hLibHal)))
|
|---|
| 61 | {
|
|---|
| 62 | return false;
|
|---|
| 63 | }
|
|---|
| 64 | if ( RT_SUCCESS(RTLdrGetSymbol(hLibHal, "dbus_error_init", (void **) &gDBusErrorInit))
|
|---|
| 65 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "dbus_bus_get", (void **) &gDBusBusGet))
|
|---|
| 66 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "dbus_error_free", (void **) &gDBusErrorFree))
|
|---|
| 67 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "dbus_connection_unref",
|
|---|
| 68 | (void **) &gDBusConnectionUnref))
|
|---|
| 69 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_ctx_new", (void **) &gLibHalCtxNew))
|
|---|
| 70 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_ctx_set_dbus_connection",
|
|---|
| 71 | (void **) &gLibHalCtxSetDBusConnection))
|
|---|
| 72 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_ctx_init", (void **) &gLibHalCtxInit))
|
|---|
| 73 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_manager_find_device_string_match",
|
|---|
| 74 | (void **) &gLibHalFindDeviceStringMatch))
|
|---|
| 75 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_device_get_property_string",
|
|---|
| 76 | (void **) &gLibHalDeviceGetPropertyString))
|
|---|
| 77 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_free_string", (void **) &gLibHalFreeString))
|
|---|
| 78 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_free_string_array",
|
|---|
| 79 | (void **) &gLibHalFreeStringArray))
|
|---|
| 80 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_ctx_shutdown", (void **) &gLibHalCtxShutdown))
|
|---|
| 81 | && RT_SUCCESS(RTLdrGetSymbol(hLibHal, "libhal_ctx_free", (void **) &gLibHalCtxFree))
|
|---|
| 82 | )
|
|---|
| 83 | {
|
|---|
| 84 | ghLibHal = hLibHal;
|
|---|
| 85 | gCheckedForLibHal = true;
|
|---|
| 86 | return true;
|
|---|
| 87 | }
|
|---|
| 88 | else
|
|---|
| 89 | {
|
|---|
| 90 | RTLdrClose(hLibHal);
|
|---|
| 91 | gCheckedForLibHal = true;
|
|---|
| 92 | return false;
|
|---|
| 93 | }
|
|---|
| 94 | }
|
|---|
