nkeynes@720 | 1 | /**
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nkeynes@729 | 2 | * $Id$
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nkeynes@720 | 3 | *
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nkeynes@720 | 4 | * OSX support functions for handling the IOKit registry.
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nkeynes@720 | 5 | * Currently this manages access to CD/DVD drives + media, plus HID devices.
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nkeynes@720 | 6 | *
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nkeynes@720 | 7 | * The HID part is much simpler...
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nkeynes@720 | 8 | *
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nkeynes@720 | 9 | * Copyright (c) 2008 Nathan Keynes.
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nkeynes@720 | 10 | *
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nkeynes@720 | 11 | * This program is free software; you can redistribute it and/or modify
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nkeynes@720 | 12 | * it under the terms of the GNU General Public License as published by
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nkeynes@720 | 13 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@720 | 14 | * (at your option) any later version.
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nkeynes@720 | 15 | *
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nkeynes@720 | 16 | * This program is distributed in the hope that it will be useful,
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nkeynes@720 | 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@720 | 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@720 | 19 | * GNU General Public License for more details.
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nkeynes@720 | 20 | */
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nkeynes@720 | 21 |
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nkeynes@720 | 22 | #include <sys/param.h>
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nkeynes@720 | 23 | #include <paths.h>
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nkeynes@720 | 24 | #include <string.h>
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nkeynes@720 | 25 | #include <stdio.h>
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nkeynes@720 | 26 | #include <fcntl.h>
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nkeynes@720 | 27 | #include <IOKit/IOMessage.h>
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nkeynes@720 | 28 | #include <IOKit/hid/IOHIDLib.h>
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nkeynes@720 | 29 | #include "osx_iokit.h"
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nkeynes@720 | 30 |
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nkeynes@720 | 31 | static IONotificationPortRef notify_port = 0;
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nkeynes@720 | 32 | static io_iterator_t iokit_iterators[4] = {0,0,0,0};
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nkeynes@720 | 33 |
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nkeynes@720 | 34 | struct osx_cdrom_drive {
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nkeynes@720 | 35 | io_string_t ioservice_path;
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nkeynes@720 | 36 | io_string_t vendor_name;
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nkeynes@720 | 37 | io_string_t product_name;
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nkeynes@720 | 38 | char media_path[MAXPATHLEN]; // BSD device path if media present, otherwise the empty string.
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nkeynes@720 | 39 | io_iterator_t media_load_iterator;
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nkeynes@720 | 40 | io_iterator_t media_unload_iterator;
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nkeynes@720 | 41 | int media_fh; // BSD device handle if open, otherwise -1
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nkeynes@720 | 42 | media_changed_callback_t media_changed;
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nkeynes@720 | 43 | void *media_changed_user_data;
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nkeynes@720 | 44 | };
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nkeynes@720 | 45 |
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nkeynes@720 | 46 | static gboolean get_bsdname_for_iomedia( io_object_t iomedia, char *buf, int buflen );
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nkeynes@720 | 47 |
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nkeynes@720 | 48 | /***************** IOKit Callbacks ******************/
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nkeynes@720 | 49 |
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nkeynes@720 | 50 | /**
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nkeynes@720 | 51 | * Called from IOKit for any IOMessages on an IOMedia. Currently the only message
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nkeynes@720 | 52 | * we're interested in is service termination.
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nkeynes@720 | 53 | */
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nkeynes@720 | 54 | static void osx_cdrom_media_notify( void *ref, io_service_t service, uint32_t msgType,
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nkeynes@736 | 55 | void *msgArgument )
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nkeynes@720 | 56 | {
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nkeynes@720 | 57 | if( msgType == kIOMessageServiceIsTerminated ) {
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nkeynes@720 | 58 | osx_cdrom_drive_t drive = (osx_cdrom_drive_t)ref;
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nkeynes@720 | 59 | if( drive->media_changed != NULL ) {
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nkeynes@720 | 60 | drive->media_changed( drive, FALSE, drive->media_changed_user_data );
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nkeynes@720 | 61 | }
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nkeynes@720 | 62 | if( drive->media_fh != -1 ) {
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nkeynes@720 | 63 | close(drive->media_fh);
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nkeynes@720 | 64 | drive->media_fh = -1;
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nkeynes@720 | 65 | }
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nkeynes@720 | 66 | drive->media_path[0] = '\0';
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nkeynes@720 | 67 | IOObjectRelease( drive->media_unload_iterator );
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nkeynes@720 | 68 | }
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nkeynes@720 | 69 | }
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nkeynes@720 | 70 |
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nkeynes@720 | 71 | /**
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nkeynes@720 | 72 | * Called from IOKit when an IOMedia is inserted that we have be interested in.
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nkeynes@720 | 73 | * FIXME: Can the matcher be restricted to descendents of the drive node? currently
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nkeynes@720 | 74 | * we watch for all IOMedia events and compare the device path to see if it's one we
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nkeynes@720 | 75 | * care about.
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nkeynes@720 | 76 | * FIXME: We assume for now that a drive has at most one piece of media at a time.
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nkeynes@720 | 77 | * If this isn't the case, the system may get a little confused.
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nkeynes@720 | 78 | */
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nkeynes@720 | 79 | static void osx_cdrom_media_inserted( void *ref, io_iterator_t iterator )
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nkeynes@720 | 80 | {
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nkeynes@720 | 81 | osx_cdrom_drive_t drive = (osx_cdrom_drive_t)ref;
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nkeynes@736 | 82 |
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nkeynes@720 | 83 | io_object_t object;
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nkeynes@720 | 84 | while( (object = IOIteratorNext(iterator)) != 0 ) {
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nkeynes@720 | 85 | io_string_t iopath = "";
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nkeynes@720 | 86 | IORegistryEntryGetPath( object, kIOServicePlane, iopath );
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nkeynes@720 | 87 | if( drive != NULL && g_str_has_prefix(iopath, drive->ioservice_path ) &&
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nkeynes@736 | 88 | get_bsdname_for_iomedia(object, drive->media_path, sizeof(drive->media_path)) ) {
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nkeynes@720 | 89 | // A disc was inserted within the drive of interest
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nkeynes@720 | 90 | if( drive->media_fh != -1 ) {
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nkeynes@720 | 91 | close(drive->media_fh);
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nkeynes@720 | 92 | drive->media_fh = -1;
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nkeynes@720 | 93 | }
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nkeynes@720 | 94 |
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nkeynes@720 | 95 | if( drive->media_changed != NULL ) {
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nkeynes@720 | 96 | drive->media_changed(drive, TRUE, drive->media_changed_user_data);
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nkeynes@720 | 97 | }
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nkeynes@720 | 98 | // Add a notification listener to get removal events.
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nkeynes@720 | 99 | IOServiceAddInterestNotification( notify_port, object, kIOGeneralInterest,
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nkeynes@720 | 100 | osx_cdrom_media_notify, drive, &drive->media_unload_iterator );
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nkeynes@736 | 101 |
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nkeynes@720 | 102 | }
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nkeynes@720 | 103 | IOObjectRelease( object );
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nkeynes@720 | 104 | }
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nkeynes@720 | 105 | }
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nkeynes@720 | 106 |
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nkeynes@720 | 107 | static void osx_drives_changed( void *ref, io_iterator_t iterator )
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nkeynes@720 | 108 | {
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nkeynes@736 | 109 | io_object_t object;
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nkeynes@736 | 110 | while( (object = IOIteratorNext(iterator)) != 0 ) {
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nkeynes@736 | 111 | IOObjectRelease(object);
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nkeynes@736 | 112 | }
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nkeynes@736 | 113 |
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nkeynes@720 | 114 | }
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nkeynes@720 | 115 |
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nkeynes@720 | 116 | /******************** Support functions *********************/
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nkeynes@720 | 117 |
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nkeynes@720 | 118 | /**
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nkeynes@720 | 119 | * Determine the BSD device name (ie "/dev/rdisk1") for a given IO object.
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nkeynes@720 | 120 | * @return TRUE if the device name was retrieved, FALSE if the request failed.
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nkeynes@720 | 121 | */
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nkeynes@720 | 122 | static gboolean get_bsdname_for_iomedia( io_object_t iomedia, char *buf, int buflen )
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nkeynes@720 | 123 | {
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nkeynes@720 | 124 | gboolean result = FALSE;
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nkeynes@720 | 125 | CFTypeRef pathRef = IORegistryEntryCreateCFProperty(iomedia, CFSTR(kIOBSDNameKey),
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nkeynes@736 | 126 | kCFAllocatorDefault, 0 );
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nkeynes@720 | 127 | if( pathRef ) {
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nkeynes@720 | 128 | char pathlen;
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nkeynes@720 | 129 | strcpy( buf, _PATH_DEV "r" );
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nkeynes@720 | 130 | pathlen = strlen(buf);
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nkeynes@720 | 131 | if( CFStringGetCString( pathRef, buf + pathlen, buflen-pathlen,
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nkeynes@736 | 132 | kCFStringEncodingASCII ) != noErr ) {
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nkeynes@720 | 133 | result = TRUE;
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nkeynes@720 | 134 | }
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nkeynes@720 | 135 | CFRelease(pathRef);
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nkeynes@720 | 136 | }
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nkeynes@720 | 137 | return result;
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nkeynes@720 | 138 | }
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nkeynes@720 | 139 |
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nkeynes@720 | 140 | static gboolean osx_cdrom_drive_get_name( io_object_t object, char *vendor, int vendor_len,
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nkeynes@736 | 141 | char *product, int product_len )
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nkeynes@720 | 142 | {
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nkeynes@720 | 143 | gboolean result = FALSE;
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nkeynes@720 | 144 | CFMutableDictionaryRef props = 0;
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nkeynes@720 | 145 | if( IORegistryEntryCreateCFProperties(object, &props, kCFAllocatorDefault, kNilOptions) == KERN_SUCCESS ) {
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nkeynes@720 | 146 | CFDictionaryRef dict =
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nkeynes@720 | 147 | (CFDictionaryRef)CFDictionaryGetValue(props, CFSTR(kIOPropertyDeviceCharacteristicsKey));
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nkeynes@720 | 148 | if( dict != NULL ) {
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nkeynes@720 | 149 | CFTypeRef value = CFDictionaryGetValue(dict, CFSTR(kIOPropertyVendorNameKey));
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nkeynes@720 | 150 | if( value && CFGetTypeID(value) == CFStringGetTypeID() ) {
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nkeynes@720 | 151 | CFStringGetCString( (CFStringRef)value, vendor, vendor_len, kCFStringEncodingUTF8 );
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nkeynes@720 | 152 | } else {
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nkeynes@720 | 153 | vendor[0] = 0;
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nkeynes@720 | 154 | }
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nkeynes@736 | 155 |
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nkeynes@720 | 156 | value = CFDictionaryGetValue(dict, CFSTR(kIOPropertyProductNameKey));
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nkeynes@720 | 157 | if ( value && CFGetTypeID(value) == CFStringGetTypeID() ) {
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nkeynes@720 | 158 | CFStringGetCString( (CFStringRef)value, product, product_len, kCFStringEncodingUTF8 );
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nkeynes@720 | 159 | } else {
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nkeynes@720 | 160 | product[0] = 0;
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nkeynes@720 | 161 | }
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nkeynes@720 | 162 | result = TRUE;
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nkeynes@720 | 163 | }
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nkeynes@720 | 164 |
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nkeynes@720 | 165 | CFRelease(props);
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nkeynes@720 | 166 | }
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nkeynes@720 | 167 | return result;
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nkeynes@720 | 168 | }
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nkeynes@720 | 169 |
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nkeynes@720 | 170 | /**
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nkeynes@720 | 171 | * Construct and initialize a new osx_cdrom_drive object, including registering
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nkeynes@720 | 172 | * it's media inserted notification.
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nkeynes@720 | 173 | */
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nkeynes@720 | 174 | static osx_cdrom_drive_t osx_cdrom_drive_new( io_object_t device )
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nkeynes@720 | 175 | {
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nkeynes@720 | 176 | osx_cdrom_drive_t drive = g_malloc0(sizeof(struct osx_cdrom_drive));
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nkeynes@736 | 177 |
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nkeynes@720 | 178 | IORegistryEntryGetPath( device, kIOServicePlane, drive->ioservice_path );
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nkeynes@720 | 179 | osx_cdrom_drive_get_name( device, drive->vendor_name, sizeof(drive->vendor_name),
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nkeynes@720 | 180 | drive->product_name, sizeof(drive->product_name) );
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nkeynes@720 | 181 | drive->media_path[0] = '\0';
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nkeynes@720 | 182 | drive->media_changed = NULL;
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nkeynes@720 | 183 | drive->media_changed_user_data = NULL;
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nkeynes@720 | 184 | drive->media_fh = -1;
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nkeynes@720 | 185 |
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nkeynes@720 | 186 | IOServiceAddMatchingNotification( notify_port, kIOFirstPublishNotification,
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nkeynes@720 | 187 | IOServiceMatching("IOMedia"),
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nkeynes@720 | 188 | osx_cdrom_media_inserted, drive,
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nkeynes@720 | 189 | &drive->media_load_iterator );
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nkeynes@720 | 190 | osx_cdrom_media_inserted( drive, drive->media_load_iterator );
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nkeynes@720 | 191 | return drive;
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nkeynes@720 | 192 | }
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nkeynes@720 | 193 |
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nkeynes@720 | 194 | /************************ Exported functions *************************/
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nkeynes@720 | 195 |
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nkeynes@720 | 196 | osx_cdrom_drive_t osx_cdrom_open_drive( const char *devname )
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nkeynes@720 | 197 | {
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nkeynes@720 | 198 | io_object_t object = IORegistryEntryFromPath( kIOMasterPortDefault, devname );
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nkeynes@720 | 199 | if( object == MACH_PORT_NULL ) {
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nkeynes@720 | 200 | return NULL;
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nkeynes@720 | 201 | }
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nkeynes@736 | 202 |
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nkeynes@720 | 203 | osx_cdrom_drive_t drive = osx_cdrom_drive_new( object );
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nkeynes@720 | 204 | IOObjectRelease( object );
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nkeynes@720 | 205 | return drive;
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nkeynes@720 | 206 | }
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nkeynes@720 | 207 |
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nkeynes@720 | 208 | void osx_cdrom_set_media_changed_callback( osx_cdrom_drive_t drive,
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nkeynes@720 | 209 | media_changed_callback_t callback,
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nkeynes@720 | 210 | void *user_data )
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nkeynes@720 | 211 | {
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nkeynes@720 | 212 | drive->media_changed = callback;
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nkeynes@720 | 213 | drive->media_changed_user_data = user_data;
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nkeynes@720 | 214 | }
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nkeynes@720 | 215 |
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nkeynes@720 | 216 | void osx_cdrom_close_drive( osx_cdrom_drive_t drive )
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nkeynes@720 | 217 | {
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nkeynes@720 | 218 | IOObjectRelease( drive->media_load_iterator );
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nkeynes@720 | 219 | IOObjectRelease( drive->media_unload_iterator );
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nkeynes@720 | 220 | if( drive->media_fh != -1 ) {
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nkeynes@720 | 221 | close(drive->media_fh);
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nkeynes@720 | 222 | drive->media_fh = -1;
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nkeynes@720 | 223 | }
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nkeynes@720 | 224 | g_free( drive );
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nkeynes@720 | 225 | }
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nkeynes@720 | 226 |
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nkeynes@720 | 227 | int osx_cdrom_get_media_handle( osx_cdrom_drive_t drive )
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nkeynes@720 | 228 | {
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nkeynes@720 | 229 | if( drive->media_fh == -1 ) {
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nkeynes@720 | 230 | if( drive->media_path[0] != '\0' ) {
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nkeynes@720 | 231 | drive->media_fh = open( drive->media_path, O_RDONLY|O_NONBLOCK );
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nkeynes@720 | 232 | }
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nkeynes@720 | 233 | }
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nkeynes@720 | 234 | return drive->media_fh;
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nkeynes@720 | 235 | }
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nkeynes@720 | 236 |
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nkeynes@720 | 237 | void osx_cdrom_release_media_handle( osx_cdrom_drive_t drive )
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nkeynes@720 | 238 | {
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nkeynes@720 | 239 | if( drive->media_fh != -1 ) {
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nkeynes@720 | 240 | close( drive->media_fh );
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nkeynes@720 | 241 | drive->media_fh = -1;
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nkeynes@720 | 242 | }
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nkeynes@720 | 243 | }
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nkeynes@720 | 244 |
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nkeynes@720 | 245 | static io_object_t iterator_find_cdrom( io_object_t iterator, find_drive_callback_t callback, void *user_data )
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nkeynes@720 | 246 | {
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nkeynes@720 | 247 | io_object_t object;
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nkeynes@720 | 248 | while( (object = IOIteratorNext(iterator)) != 0 ) {
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nkeynes@720 | 249 | io_string_t iopath = "";
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nkeynes@720 | 250 | char product[256], vendor[256];
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nkeynes@720 | 251 | IORegistryEntryGetPath( object, kIOServicePlane, iopath );
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nkeynes@720 | 252 | osx_cdrom_drive_get_name( object, vendor, sizeof(vendor), product, sizeof(product) );
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nkeynes@720 | 253 | if( callback( object, vendor, product, iopath, user_data ) ) {
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nkeynes@720 | 254 | IOObjectRelease(iterator);
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nkeynes@720 | 255 | return object;
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nkeynes@720 | 256 | }
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nkeynes@720 | 257 | IOObjectRelease(object);
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nkeynes@720 | 258 | }
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nkeynes@720 | 259 | IOObjectRelease(iterator);
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nkeynes@720 | 260 | }
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nkeynes@736 | 261 |
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nkeynes@720 | 262 |
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nkeynes@720 | 263 | /**
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nkeynes@720 | 264 | * Search for a CD or DVD drive (instance of IODVDServices or IOCompactDiscServices).
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nkeynes@720 | 265 | * The callback will be called repeatedly until either it returns TRUE, or all drives
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nkeynes@720 | 266 | * have been iterated over.
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nkeynes@720 | 267 | *
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nkeynes@720 | 268 | * @return an IO registry entry for the matched drive, or 0 if no drives matched.
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nkeynes@720 | 269 | *
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nkeynes@720 | 270 | * Note: Use of IOCompactDiscServices is somewhat tentative since I don't have a Mac
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nkeynes@720 | 271 | * with a CD-Rom drive.
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nkeynes@720 | 272 | */
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nkeynes@720 | 273 | io_object_t find_cdrom_drive( find_drive_callback_t callback, void *user_data )
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nkeynes@720 | 274 | {
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nkeynes@720 | 275 | mach_port_t master_port;
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nkeynes@720 | 276 | CFMutableDictionaryRef match;
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nkeynes@720 | 277 | io_iterator_t services;
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nkeynes@720 | 278 | io_object_t result;
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nkeynes@736 | 279 |
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nkeynes@720 | 280 | if( IOMasterPort( MACH_PORT_NULL, &master_port ) != KERN_SUCCESS ) {
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nkeynes@720 | 281 | return 0; // Failed to get the master port?
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nkeynes@720 | 282 | }
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nkeynes@736 | 283 |
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nkeynes@720 | 284 | match = IOServiceMatching("IODVDServices");
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nkeynes@720 | 285 | if( IOServiceGetMatchingServices(master_port, match, &services) != kIOReturnSuccess ) {
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nkeynes@720 | 286 | return 0;
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nkeynes@720 | 287 | }
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nkeynes@736 | 288 |
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nkeynes@720 | 289 | result = iterator_find_cdrom( services, callback, user_data );
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nkeynes@720 | 290 | if( result != 0 ) {
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nkeynes@720 | 291 | return result;
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nkeynes@720 | 292 | }
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nkeynes@736 | 293 |
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nkeynes@720 | 294 | match = IOServiceMatching("IOCompactDiscServices");
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nkeynes@720 | 295 | if( IOServiceGetMatchingServices(master_port, match, &services) != kIOReturnSuccess ) {
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nkeynes@720 | 296 | return 0;
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nkeynes@720 | 297 | }
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nkeynes@720 | 298 | return iterator_find_cdrom( services, callback, user_data );
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nkeynes@720 | 299 | }
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nkeynes@720 | 300 |
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nkeynes@720 | 301 |
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nkeynes@720 | 302 | // *********************** Notification management ************************/
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nkeynes@720 | 303 |
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nkeynes@720 | 304 | static void osx_hid_inserted( void *ref, io_iterator_t iterator )
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nkeynes@720 | 305 | {
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nkeynes@720 | 306 | io_object_t object;
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nkeynes@720 | 307 | while( (object = IOIteratorNext(iterator)) != 0 ) {
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nkeynes@720 | 308 | io_string_t iopath = "";
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nkeynes@720 | 309 | IORegistryEntryGetPath( object, kIOServicePlane, iopath );
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nkeynes@720 | 310 | IOObjectRelease( object );
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nkeynes@720 | 311 | }
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nkeynes@720 | 312 | }
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nkeynes@720 | 313 |
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nkeynes@720 | 314 | gboolean osx_register_iokit_notifications()
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nkeynes@720 | 315 | {
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nkeynes@720 | 316 | notify_port = IONotificationPortCreate( kIOMasterPortDefault );
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nkeynes@720 | 317 | CFRunLoopSourceRef runloop_source = IONotificationPortGetRunLoopSource( notify_port );
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nkeynes@720 | 318 | CFRunLoopAddSource( CFRunLoopGetMain(), runloop_source, kCFRunLoopCommonModes );
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nkeynes@720 | 319 |
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nkeynes@720 | 320 | // Drive notifications
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nkeynes@720 | 321 | if( IOServiceAddMatchingNotification( notify_port, kIOFirstPublishNotification,
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nkeynes@720 | 322 | IOServiceMatching("IOCompactDiscServies"),
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nkeynes@720 | 323 | osx_drives_changed, NULL, &iokit_iterators[0] ) != kIOReturnSuccess ) {
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nkeynes@720 | 324 | ERROR( "IOServiceAddMatchingNotification failed" );
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nkeynes@720 | 325 | }
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nkeynes@720 | 326 | osx_drives_changed(NULL, iokit_iterators[0]);
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nkeynes@720 | 327 | if( IOServiceAddMatchingNotification( notify_port, kIOFirstPublishNotification,
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nkeynes@720 | 328 | IOServiceMatching("IODVDServies"),
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nkeynes@720 | 329 | osx_drives_changed, NULL, &iokit_iterators[1] ) != kIOReturnSuccess ) {
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nkeynes@720 | 330 | ERROR( "IOServiceAddMatchingNotification failed" );
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nkeynes@720 | 331 | }
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nkeynes@720 | 332 | osx_drives_changed(NULL, iokit_iterators[1]);
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nkeynes@736 | 333 |
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nkeynes@720 | 334 | if( IOServiceAddMatchingNotification( notify_port, kIOFirstPublishNotification,
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nkeynes@720 | 335 | IOServiceMatching(kIOHIDDeviceKey),
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nkeynes@720 | 336 | osx_hid_inserted, NULL, &iokit_iterators[4] ) != kIOReturnSuccess ) {
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nkeynes@720 | 337 | ERROR( "IOServiceAddMatchingNotification failed" );
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nkeynes@720 | 338 | }
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nkeynes@720 | 339 | osx_hid_inserted(NULL, iokit_iterators[2]);
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nkeynes@720 | 340 | }
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nkeynes@720 | 341 |
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nkeynes@720 | 342 | void osx_unregister_iokit_notifications()
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nkeynes@720 | 343 | {
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nkeynes@720 | 344 | CFRunLoopSourceRef runloop_source = IONotificationPortGetRunLoopSource( notify_port );
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nkeynes@720 | 345 | CFRunLoopRemoveSource( CFRunLoopGetMain(), runloop_source, kCFRunLoopCommonModes );
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nkeynes@720 | 346 | IONotificationPortDestroy( notify_port );
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nkeynes@720 | 347 | notify_port = 0;
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nkeynes@720 | 348 | }
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