mount_hfs/optical.c

   1 /*
   2  * Copyright (c) 2007 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include "optical.h"
  25
  26 #include <paths.h>
  27 #include <string.h>
  28 #include <CoreFoundation/CoreFoundation.h>
  29 #include <IOKit/IOKitLib.h>
  30 #include <IOKit/storage/IOMedia.h>
  31 #include <IOKit/storage/IOBDMedia.h>
  32 #include <IOKit/storage/IOCDMedia.h>
  33 #include <IOKit/storage/IODVDMedia.h>
  34
  35 static io_service_t
  36 __io_media_copy_whole_media(io_service_t media)
  37 {
  38     io_service_t parent;
  39     CFTypeRef property;
  40
  41     IOObjectRetain(media);
  42
  43     while (media) {
  44         if (IOObjectConformsTo(media, kIOMediaClass)) {
  45             property = IORegistryEntryCreateCFProperty(media, CFSTR(kIOMediaWholeKey), kCFAllocatorDefault, 0);
  46             if (property) {
  47                 CFRelease(property);
  48                 if (property == kCFBooleanTrue)
  49                     break;
  50             }
  51         }
  52         parent = IO_OBJECT_NULL;
  53         IORegistryEntryGetParentEntry(media, kIOServicePlane, &parent);
  54         IOObjectRelease(media);
  55         media = parent;
  56     }
  57
  58     return media;
  59 }
  60
  61 static io_service_t
  62 __io_media_create_from_bsd_name(const char *name)
  63 {
  64     if (!strncmp(_PATH_DEV, name, strlen(_PATH_DEV)))
  65         name += strlen(_PATH_DEV);
  66
  67     return IOServiceGetMatchingService(kIOMasterPortDefault, IOBSDNameMatching(kIOMasterPortDefault, 0, name));
  68 }
  69
  70 static int
  71 __io_media_is_writable(io_service_t media)
  72 {
  73     int writable = 0;
  74     CFTypeRef property;
  75
  76     property = IORegistryEntryCreateCFProperty(media, CFSTR(kIOMediaWritableKey), kCFAllocatorDefault, 0);
  77     if (property) {
  78         CFRelease(property);
  79         if (property == kCFBooleanTrue) {
  80             writable = _OPTICAL_WRITABLE_SECTOR;
  81
  82             if (IOObjectConformsTo(media, kIOBDMediaClass)) {
  83                 property = IORegistryEntryCreateCFProperty(media, CFSTR(kIOBDMediaTypeKey), kCFAllocatorDefault, 0);
  84                 if (property) {
  85                     if (CFEqual(property, CFSTR(kIOBDMediaTypeR)))
  86                         writable = _OPTICAL_WRITABLE_PACKET | _OPTICAL_WRITABLE_ONCE;   /* BD-R */
  87                     else if (CFEqual(property, CFSTR(kIOBDMediaTypeRE)))
  88                         writable = _OPTICAL_WRITABLE_PACKET;                           /* BD-RE */
  89                     CFRelease(property);
  90                 }
  91             } else if (IOObjectConformsTo(media, kIOCDMediaClass)) {
  92                 property = IORegistryEntryCreateCFProperty(media, CFSTR(kIOCDMediaTypeKey), kCFAllocatorDefault, 0);
  93                 if (property) {
  94                     if (CFEqual(property, CFSTR(kIOCDMediaTypeR)))
  95                         writable = _OPTICAL_WRITABLE_PACKET | _OPTICAL_WRITABLE_ONCE;   /* CD-R */
  96                     else if (CFEqual(property, CFSTR(kIOCDMediaTypeRW)))
  97                         writable = _OPTICAL_WRITABLE_PACKET;                            /* CD-RW */
  98
  99                     CFRelease(property);
 100                 }
 101             } else if (IOObjectConformsTo(media, kIODVDMediaClass)) {
 102                 property = IORegistryEntryCreateCFProperty(media, CFSTR(kIODVDMediaTypeKey), kCFAllocatorDefault, 0);
 103                 if (property) {
 104                     if (CFEqual(property, CFSTR(kIODVDMediaTypeR)))
 105                         writable = _OPTICAL_WRITABLE_PACKET | _OPTICAL_WRITABLE_ONCE;   /* DVD-R */
 106                     else if (CFEqual(property, CFSTR(kIODVDMediaTypeRW)))
 107                         writable = _OPTICAL_WRITABLE_PACKET;                            /* DVD-RW */
 108                     else if (CFEqual(property, CFSTR(kIODVDMediaTypePlusR)))
 109                         writable = _OPTICAL_WRITABLE_PACKET | _OPTICAL_WRITABLE_ONCE;   /* DVD+R */
 110                     else if (CFEqual(property, CFSTR(kIODVDMediaTypePlusRW)))
 111                         writable = _OPTICAL_WRITABLE_PACKET;                            /* DVD+RW */
 112                     else if (CFEqual(property, CFSTR(kIODVDMediaTypeHDR)))
 113                         writable = _OPTICAL_WRITABLE_PACKET | _OPTICAL_WRITABLE_ONCE;   /* HD DVD-R */
 114
 115                     CFRelease(property);
 116                 }
 117             }
 118         }
 119     }
 120
 121     return writable;
 122 }
 123
 124 int
 125 _optical_is_writable(const char *dev)
 126 {
 127     int writable = 0;
 128     io_service_t media;
 129     io_service_t whole;
 130
 131     media = __io_media_create_from_bsd_name(dev);
 132     if (media) {
 133         writable = __io_media_is_writable(media);
 134         if (writable) {
 135             whole = __io_media_copy_whole_media(media);
 136             if (whole) {
 137                 writable = __io_media_is_writable(whole);
 138
 139                 IOObjectRelease(whole);
 140             }
 141         }
 142         IOObjectRelease(media);
 143     }
 144
 145     return writable;
 146 }