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javaandroidbashowner

List all possible owners and groups

Using either Java or bash how can I list all possible owners and groups.

For instance if I was to do the following command in a shell with an obviously wrong owner:

chown ljafdj ~/Desktop/test.txt

My output would be

chown: invalid user: `ljafdj'

The same would be for chgrp

So how can I get a list of valid users using bash or Java?

It's for an Android application and I need to display the possibilities to my user so they can change if needed.

Solution

  • Groups in Android are hardcoded and "are used to isolate processes and grant permissions." However, if you want to get the online username, you can use AccountManager.getAccounts().