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Re: Finding all mounted volumes

Jason Boyd <email@hidden> wrote:

>[...] Our legacy data contains file paths
>which include the volume name and use old Mac syntax like so:
>
>Foobar CD:Some Directory:subdir:file.ext
>
>Now I need to manipulate these paths to find the actual file but it must
>work on OS X, Windows 98 and later, and Linux/UNIX.

How do you propose to map a Mac-specific volume-name (Foobar CD) into a
Windows-specific drive-letter (D: or is it E:?), when Windows doesn't even
have volume-names?

The only solution I can think of is for a human with some knowledge of the
file-system to create a mapping table (Hashtable or other Map), or assist
the computer in the creation of one. This table would translate some
predetermined portion of the Mac-specific pathname into a platform-specific
base-location, i.e. a File representing a "directory" location. Just
remember that no algorithm is going to work perfectly, so human
intervention in creating the table is needed.


>Is there a preferred way to enumerate volumes on OS X, and how does one
>reconcile this with the other platforms?

There is no way to "enumerate volumes" from Java, without the use of some
external library. The very concept of "a volume" may change across
platforms, too. For example, not all mounted file-systems on Mac OS X (or
other Unix-ish OSes) represent a user-perceivable volume. Type 'mount' in
Terminal to see what I mean.

JConfig was already mentioned, though you'll probably still need human
intervention to map "Foobar CD" to a corresponding "volume" on a given
platform.

You might also find my Easy Posix Toolkit useful on Mac OS X, especially
Environs.getMounted(), which returns an array of MountInfo's representing
every mounted file-system:
<http://www.amug.org/~glguerin/sw/#easyposix>

Also, I think Pathname and PathnameFormat may be useful for doing pathname
parsing and conversion. You'll have to create a PathnameFormat subclass to
handle the classical colon-separated Mac format, but this should do it:
new PathnameFormat( ':', false )

-- GG
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