在一个项目中，我最近尝试通过 osx 10.9.5 上的 libusb 访问 USB 存储设备。但显然一些默认驱动程序声称该设备，我无法访问它。当我尝试通过 libusb 访问它时，它返回我有“权限不足”。
当我在 Ubuntu 中执行 (java) 应用程序时，一切都按预期运行。
我在互联网上的研究表明，提供与较高探测分数上的设备相匹配的无代码 kext 将阻止默认驱动程序声明该设备。这将完全解决问题，因为卸载 IOUSBMassStorage kext 使得我们可以使用设备执行所需的操作。
我创建无代码 kext 的尝试并没有像我希望的那样成功，因为它似乎既不会在启动时加载，也不会在我使用时加载kextload。至少我是这么想的，因为我无法卸载它，也无法在列出的任何地方找到它。
我的 Info.plist 的最新版本如下所示：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>OSBundleLibraries</key>
<dict/>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleGetInfoString</key>
<string>Test USB Stick</string>
<key>CFBundleIdentifier</key>
<string>de.mischok.testkext</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>Test USB Device</string>
<key>CFBundlePackageType</key>
<string>KEXT</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>1.0.0</string>
<key>IOKitPersonalities</key>
<dict>
<key>Device Driver</key>
<dict>
<key>CFBundleIdentifier</key>
<string>de.mischok.testkext</string>
<key>IOClass</key>
<string>IOUSBUserClientInit</string>
<key>IOProviderClass</key>
<string>IOUSBDevice</string>
<key>idProduct</key>
<integer>357</integer>
<key>idVendor</key>
<integer>4871</integer>
<key>bcdDevice</key>
<integer>4352</integer>
<key>bConfigurationValue</key>
<integer>1</integer>
<key>bInterfaceNumber</key>
<integer>0</integer>
</dict>
<key>Interface Driver</key>
<dict>
<key>CFBundleIdentifier</key>
<string>de.mischok.testkext</string>
<key>IOClass</key>
<string>IOUSBUserClientInit</string>
<key>IOProviderClass</key>
<string>IOUSBInterface</string>
<key>idProduct</key>
<integer>357</integer>
<key>idVendor</key>
<integer>4871</integer>
<key>bcdDevice</key>
<integer>4352</integer>
<key>bConfigurationValue</key>
<integer>1</integer>
<key>bInterfaceNumber</key>
<integer>0</integer>
</dict>
</dict>
<key>OSBundleRequired</key>
<string>Local-Root</string>
</dict>
</plist>
跑步时sudo kextutil -t -n /path/to/my.kext返回这些诊断信息：
Diagnostics for /Users/user/Desktop/testv1-0.kext:
Warnings:
Personality CFBundleIdentifier names a kext that doesn't declare an executable:
'Interface Driver' -> 'de.mischok.testkext'
'Device Driver' -> 'de.mischok.testkext'
Code Signing Failure: not code signed
Warnings:
Personality CFBundleIdentifier names a kext that doesn't declare an executable:
'Interface Driver' -> 'de.mischok.testkext'
'Device Driver' -> 'de.mischok.testkext'
/Users/user/Desktop/testv1-0.kext appears to be loadable (including linkage for on-disk libraries).
正如它所说的 kext 应该是可加载的，我认为它应该可以工作。但是当使用以下命令加载 kext 时，system.log 会记录这一点，而不是工作sudo kextload /path/to/my.kext:
Nov 5 12:28:58 users-MacBook-Pro.local sudo[528]: user : TTY=ttys000 ; PWD=/Users/user ; USER=root ; COMMAND=/sbin/kextload /Users/user/Desktop/testv1-0.kext
Nov 5 12:28:58 users-MacBook-Pro.local com.apple.kextd[12]: WARNING - Invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext "/Users/user/Desktop/testv1-0.kext"
由于这只是一个警告，我认为它已成功加载。但一旦我插入设备，USB 探测器输出如下所示：
Nov 5 12:57:11.911 [6] Device Descriptor Dump
Nov 5 12:57:11.911 [6] bLength 18
Nov 5 12:57:11.911 [6] bDescriptorType 1
Nov 5 12:57:11.911 [6] bcdUSB 768 (0x0300)
Nov 5 12:57:11.911 [6] bDeviceClass 0
Nov 5 12:57:11.911 [6] bDeviceSubClass 0
Nov 5 12:57:11.911 [6] bDeviceProtocol 0
Nov 5 12:57:11.911 [6] bMaxPacketSize0 9
Nov 5 12:57:11.911 [6] idVendor 4871 (0x1307)
Nov 5 12:57:11.911 [6] idProduct 357 (0x0165)
Nov 5 12:57:11.911 [6] bcdDevice 4352 (0x1100)
Nov 5 12:57:11.911 [6] iManufacturer 1
Nov 5 12:57:11.911 [6] iProduct 2
Nov 5 12:57:11.911 [6] iSerialNumber 3
Nov 5 12:57:11.911 [6] bNumConfigurations 1
Nov 5 12:57:11.916 [5] Finding device driver for DEVICE, matching personality using com.apple.iokit.IOUSBUserClient, score: 106999, wildCard = 3
Nov 5 12:57:11.916 [6] Matched: idVendor (4871) idProduct (357) bcdDevice (4352)
Nov 5 12:57:11.916 [6] Didn't Match: nothing
Nov 5 12:57:11.917 [5] Finding device driver for DEVICE, matching personality using com.apple.driver.AppleUSBComposite, score: 50000, wildCard = 0
Nov 5 12:57:11.917 [6] Matched: bDeviceClass (0) bDeviceSubClass (0)
Nov 5 12:57:11.917 [6] Didn't Match: nothing
Nov 5 12:57:11.918 [5] Finding device driver for DEVICE, matching personality using com.apple.driver.AppleUSBCDC, score: 60000, wildCard = 0
Nov 5 12:57:11.918 [6] Matched: bDeviceClass (0) bDeviceSubClass (0) bDeviceProtocol (0)
Nov 5 12:57:11.918 [6] Didn't Match: nothing
这些是唯一发生的个性匹配，所以我想知道，我应该做什么才能让我的驱动程序与我的设备甚至加载相匹配？
