Russell Miles wrote:
>I'm trying to write a simple app that shows a list of current users as one
>of its functions and it would be great if I could link this in so that it
>picks up user icons as set in the users section of System Preferences.
>Anyone have any clue how this can be done from Java?
The user information is in the NetInfo database. It's normally managed by
the app:
/Applications/Utilities/NetInfo Manager
There are also commands you can run: niutil, nireport, nidump.
The niutil command has two sub-commands of direct interest: -list and -read.
You exec() the command-line in Java and then read the result from the
Process's input-stream. Always use the String[] forms of exec(), never the
stupider and more blunder-prone single-String forms.
For example, for a user-name of "me":
niutil -read . /users/me
The picture is listed as the property whose line begins with "picture:".
It's convenient that a java.util.Properties will read this format directly,
though it might become dazed and confused if there are any #'s, !'s, or \'s
in the stream.
To list all the user-names (short account names):
niutil -list . /users
For reference, see 'man niutil' and the API docs for Properties, etc. To
decode TIFF files, which many user-pictures will be, choose a library here:
<http://www.geocities.com/marcoschmidt.geo/java-image-coding.html>
-- GG
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