This workaround does seem dodgey to me. I did a bit of looking around and this is what I found.
First stop the Net::FTP docs. Nothing helpful there except a few commands I don't recognise.
Next stop the RFC Net::FTP says it was based on at IETF. Then test the information I found.
The command $ftp->list(filename) returns (on my linux system) the same symbolic link `ls` type information for a file AND the dereferenced directory in the case of a directory.
So if the returned starts with a 'd', the link points to a directory and otherwise not (I think).
Note: $ftp->list(filename) returns a glob, so you'll have to read from it like a filehandle.
Hope that points you in a better direction....
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