Which java classes deals with chmod, chown, etc

[Guest_imported]

Hi all,
I need to activate the following unix commands in a Java application:

- df for checking the available disk space.
- test -x for checking if a file has execute permission.
- chmod to change a file permissions
- chown to change a file owner
- ln -s to create a link
- uname to find the local host
-who am i to find the local user.

Are there any Java methods deals with it ?

 

[globos]

Hi.

I don't think Java is the good way to perform unix commands, since it is supposed to be independant from OS.
However, you can execute these commands whith the Runtime class, like this :

...
Runtime rt = Runtime.getRuntime ();

tr.execute ("your command"
...

Bye. --
Globos

 

[rsubras]

hi globos,
well..er...i dont know unix as much...but do that Runtime class commands really activate the unix commands as well esp the file access permissions that mayay is talking about

 

[LittleWing]

most of those commands will have to use the runtime.execute. the File object in java is the best way to tackle file issues but what u are looking for goes well beyond its capibilities.

For the variables that are never going to change i.e. whoami and uname, you should consider setting them as variables in your start script and passing them in as parameters to your application either as direct params to the main or using the -D switch for the JVM