macOS Volume name

[VijayKumar]

Hi,

Can someone please help me to obtain programmatically (preferably C) the volume name of a usb storage device that is connected to a Mac (10.4) system?

Thanks in advance,
Vijay

 

[chaithrika]

You can use DiskArbitration framework. There are APIs that can solve your problem.

 

[kainjow]

You can also use getmntinfo()

 

[Sayer]

You can use this (C and Carbon.framework):

    // Iterate across all mounted volumes
    for (volIndex=1; noErr == result || nsvErr != result; volIndex++) {
        FSVolumeRefNum 	volRef;
        HFSUniStr255 	volName;
        FSVolumeInfo 	volInfo;
        
        bzero((void *) &volInfo, sizeof(volInfo));
        result = FSGetVolumeInfo(kFSInvalidVolumeRefNum, 
                                volIndex,
                                &volRef,
                                kFSVolInfoFSInfo + kFSVolInfoSizes + kFSVolInfoFlags,
                                &volInfo,
                                &volName,
                                NULL);
    }

Volume name will be in volName for each volume found. Volume names are unicode-based and the HFSUniStr255 is a special string format used only here, you must convert it to something else for more wide-spread use in Mac OS X.

You can make an NSString (Objective-C Cocoa framework from volName using:

[NSString stringWithCharacters:volName.unicode length:volName.length]

And similar for a CFStringRef for C Carbon framework.