how to call a system command with java applet?

nickhx · 08-04-2004, 08:13 PM

I want to call a system command "df" to show information of the system with java applet,
is there any function to implement ?

jlliagre · 08-05-2004, 01:38 AM

For security reasons, a java applet is by default running in a "sand box", preventing it to access the underlying operation system.
Breaking it is only possible if you manage to sign your applet with a certificate accepted by the browser, and if the user authorize the applet to do the things it want.

see: http://www.linuxquestions.org/questi...80#post1073580

cppkid · 08-05-2004, 07:02 AM

I remember a little there was something like getRuntime(), i don't exactly remember how to do it but search for it hope you will find your answer.

aaa · 08-05-2004, 07:20 AM

Runtime.getRuntime().exec()
You will have to take care of the standard io streams for the command to work properly, and for you to get the output.
Applets are usually not allowed to use this.

german · 08-11-2004, 12:46 AM

you will have to sign your applet to allow it fewer restrictions on the remote box it's running... which means any user that sees the page will have a dialog pop up verifying they want to allow it said permission... similar to SSL certificates... like when you go to a site with a self-generated certificate and the browser asks you if you want to accept it now, forever, or not at all...