Here's my INFO command, an extension for BASIC.SYSTEM, which was on Genie and Delphi, hmm, February 1990? Dunno, but that's the mod date for the file. Anyway, in BASIC.SYSTEM, just BRUN INFO or -INFO, and a little description will pop up. The command allows the user to change filetype, auxtype, or access bits (three are reserved however, and forbidden). Also, when either BRUNning it or using it, specifying a value other than zero for the V (think "visibility") parameter will prevent the report message from printing, making it handy if you're using a front end of some kind. I'll upload the source code later if I can find it. 
INFO [filename][,V#][,T#][,A#][,L#][,S#][,D#] 
Note that the parameters can be either in decimal or hex. Note also that using INFO with no filename will show the size info for the current volume (I think, therefore I forget). Ordinarily the L parameter can take a larger number, but in this case it's limited to positive integers less than 256. 

 
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