🚀 go-pugleaf

I don't think there's a function that returns the filelength of a file, with
AmigaDOS.  But I need an equivalent...how do you determine the length of a file
given only the file handle (eg from an Open)?  There must be a way to find the
associated file lock, as one is created when the file is opened (shared /
exclusive)...right?  Then you can Examine the FileInfoBlock and get the file's
length from the fibSize field.

    ie    size_t  filelength(int handle)

I want a function that doesn't require knowing the filename...or do I need 2.0?

Thanks.