On Tue, 01 Sep 2009, Mario H. Sabado wrote:
Hi,
> Is it possible to have drive letter support for Windows OS when specifying
> database file? The root of data starts from where the program was
> executed, is this correct?
Yes, it is intentional protection. Otherwise somoone can easy write
program to remove all files from your hard disk.
You can control default file location using 3-rd parameter in
NETIO_LISTEN() function, see the ChangeLog:
NETIO_LISTEN( [<nPort>], [<cAddress>], [<cRootDir>] )
-> <pListenSocket> | NIL
If you pass empty string "" as <cRootDir> then you will fully disable
the protection. Do it for your own risk.
Default value for <cRootDir> is the localization of server binaries.
> What if the hierarchy of the data directory is
> higher than where the program is executed or in the other directory or
> drive (in case of Windows)?
NETIO server control given paths and does not allow to create any file
outside root directory. It also controls ".." usage in paths so it cannot
be used as workaround for protection but they can be used only to the
level of root directory, i.e. cRootDir:="/var/data" and you can access
file /var/data/myfs1/../myfs2/mytable using "myfs1/../myfs2/mytable"
as file name of course if above directories exists but it's illegal
to use "../somedir/somefile".
If filesystem support soft or hard links then they can be used
to break this protection anyhow for this it's necessary to have
direct access to shared paths because NETIO server does not allow
to create any links remotely.
best regards,
Przemek
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