folderID, folderName, volumeID

Three related command line tools:

folderID - given path, returns node ID of a folder/directory (used to be parID in FSSpec)
folderName - reverse of the above - given node ID, returns path
volumeID - given path to a volume, returns volume ID (used to be vRefNum in FSSpec)

e.g.


$ folderID /Users/Shared

2739013



$ folderName 2739013

/Users/Shared



$ volumeID /Volumes/HardDisk

-100

Binaries are here.

Sources (including XCode projects) are here:

This is free software. I hope you will find it useful.