#7 Support correct disk space information for "df" command

[Kirk Morrow]

Current values are displayed as either 0 or nine 9s.

$ df | egrep "(curlftpfs|Filesystem)"
Filesystem                                 1K-blocks    Used Available Use% Mounted on
curlftpfs#ftp://cybertesla@asusrouter.com/ 999999999       0 999999999   0% /mnt/asus

[Bernd Schuller]

... this is impossible to implement, because the filesystem is remote (on an FTP server), and the information needed for "df" is not available via the FTP API