yes, the S_IF* constants from Fcntl tell you the meaning of the remaining bits: 
S_IFREG => 32768
S_IFDIR => 16384
S_IFLNK => 40960
S_IFBLK => 24576
S_IFCHR => 8192
S_IFIFO => 4096
S_IFSOCK => 49152

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Regarding the compatibility of the different SSH/SFTP modules availables, read this post: Re^3: package that can handle ftp, sftp, http etc ?.

In reply to Re^3: Net::SSH2::SFTP stat function by salva
in thread Net::SSH2::SFTP stat function by james_

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