Question

Changing running permission to Root

Asked by: lirong

Hi

I want to write a simpe Java application that has a Root permission (like modifying the /etc/hosts file).

I want to run this application with a X user that that user will have abilities to modify the /etc/hosts file.

Is it possible to do that in Java ?

I know that in C,C++ I can do that.

Thanks,

Liron

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Asked On
2002-11-19 at 07:07:33ID20402222
Topic

Miscellaneous Programming

Participating Experts
3
Points
500
Comments
8

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Answers

 

by: csarPosted on 2002-11-19 at 08:30:39ID: 7469329

Wrap it into a script runroot.sh that is owned by root.
chgrp ALLOWEDUSER runroot.sh;
chown root ALLOWEDUSER
chmod g+rx,u+s runroot.sh

The last command needs to be issued by root.

 

by: ahoffmannPosted on 2002-11-19 at 09:19:52ID: 7469528

sudo your-java-app

 

by: lirongPosted on 2002-12-02 at 07:14:18ID: 7520385

I didn't followed you.
Let's say that I have a application called: My.class
This application needs to execute the command "mv /etc/hosts /etc/hosts.sav"

I'm running this application under user: lirong.

In order to execute the move, I need to execute it in a root permission.
How do I do that ?

 

by: ahoffmannPosted on 2002-12-02 at 10:03:25ID: 7521224

either run the hole application as root (not recommended):
  sudo java My.class
or call Java's embeded system call:
    System.exec("su root -c "mv /etc/hosts /etc/hosts.sav");

(not shure about the method name: System.exec() )

 

by: lirongPosted on 2002-12-03 at 00:36:05ID: 7524241

The above isn't correct.
Please help !!!

 

by: ahoffmannPosted on 2002-12-03 at 00:55:33ID: 7524294

what is wrong?

 

by: DominicCroninPosted on 2003-08-23 at 08:35:57ID: 9209007

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
Recommendation: Split between csar and ahoffman

Please leave any comments here within the next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!

DominicCronin
EE Cleanup Volunteer

 

by: ahoffmannPosted on 2003-08-24 at 14:24:13ID: 9213040

current update:
  java.lang.Runtime.exec("su root -c "mv /etc/hosts /etc/hosts.sav")

20120131-EE-VQP-002

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