如何判断Mac OS X中是否安装了给定路径的可移动媒体?

看看苹果的 VolumeToBSDNode 示例代码。我相信它应该有你需要的代码位。

描述

显示如何遍历所有已装入的卷,并检索每个卷的BSD节点名(/dev/disk*)。该信息用于确定卷是否位于CD、DVD或其他存储介质上。

PBHGetVolParmsSync 本例中的调用已弃用。以下是使用较新功能的区别:

-            HParamBlockRec pb;

-            // Use the volume reference number to retrieve the volume parameters. See the documentation
-            // on PBHGetVolParmsSync for other possible ways to specify a volume.
-            pb.ioParam.ioNamePtr = NULL;
-            pb.ioParam.ioVRefNum = actualVolume;
-            pb.ioParam.ioBuffer = (Ptr) &volumeParms;
-            pb.ioParam.ioReqCount = sizeof(volumeParms);
-            
-            // A version 4 GetVolParmsInfoBuffer contains the BSD node name in the vMDeviceID field.
-            // It is actually a char * value. This is mentioned in the header CoreServices/CarbonCore/Files.h.
-            result = PBHGetVolParmsSync(&pb);
+            // Use FSGetVolumeParms instead of the deprecated PBHGetVolParmsSync
+            result = FSGetVolumeParms(actualVolume, &volumeParms, sizeof(volumeParms));
+