Re: [OT] change user when executing some script

On Wed, Jun 13, 2007 at 05:12:34PM +0200, Galevsky wrote:

Let's have 3 users: user1, user2 and user3
let's have a user1 script: /home/user1/script.sh

Script is:

#!/bin/bash
if [ -f '/home/user1/testfile' ]
then rm /home/user1/testfile
else touch /home/user1/testfile
fi


Both user2 and user3 can execute it. What I want is user3 be able to
delete the file that was created before by user2 during a previous
run. But I fail to find a solution. Even if user1 set the
setuid/setgid flag on the script file, the file /home/user1/testfile
belongs to user2 and user3 won't be able to delete the file.

How can I make the /home/user1/testfile belong to user1, the owner of
the script instead of the user that launches it ?


On DEBIAN, to remove a file, you need write permissions on the directory
in which it resides. I suppose user1 could give group write to the
directory. You would then create a group and put user[1-3] in that
group.

Doug.


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