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\part{Specifying multi-domain jails in Gollem FTP}
Not exactly documented, most people may assume that setting an FTP jail is restricted to absolute paths in Gollem's \texttt{backend.php}.

This is clearly not suitable for servers where users log into virtual sites under different domains. Two styles of jails are then desired:

\begin{itemize}
\item The user is restricted to \texttt{/path/to/site-root/home/user}


\item The user is restricted to \texttt{/path/to/site-root} (suitable for site owners)


\end{itemize}
\section{Trouble is, the site-root location is a variable.}
\section{(section describing userhome-relative paths for root and home deleted)}
(later...)

Turns out the problem was wrongly posed.

\begin{itemize}
\item FTP jail is normally handled by the FTP server in its configuration. proftp for example allows domain-specific jails. Fine.


\item \textit{Problem} is actually to dynamically set 'hostspec' to be the current user's domain so that one-click login to ftp works with correct ftp-server-resolving of appropriate jail root.


\end{itemize}
Is for example the current domain running horde available as<br />
'hostspec' => \$GLOBALS['something...'],

\section{For that matter, is there any quick way to see what global values are available?}
Possible solutions...

'hostspec' => \$\_SERVER['SERVER\_NAME'],<br />
which would howver need to be recast from e.g. 'webmail.example.com' to 'ftp.example.com'

And if ftp-login to explicit IP correctly references the appropriate virtual server configuration for jail path:<br />
'hostspec' => \$\_SERVER['SERVER\_ADDR'],

The last works in my setup at least.

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