Puppy Linux Discussion Forum

thunor · Last edited by thunor on Mon 21 Mar 2011, 17:29; edited 1 time in total

Hi

I've used Linux for some time but I've only recently been playing with Puppy Linux. In fact with this latest 5.20 release I'm using it more than my regular installed distro; it's a great piece of work, well done.

I just attempted to stop a game from writing to its rcfile and so I set the permissions to r--r--r-- i.e. 444, but the game still kept modifying it and I did too by opening it in Geany, modifying it and saving it back out. I know that everything's root:root, but is this behaviour correct?

Cheers,
Thunor

thunor · Posted: Tue 15 Mar 2011, 08:57 Post subject:

Well, I guessed either I've asked a question that's been asked a million times before or I've underestimated the power of the superuser Very Happy

I've just tested this in a regular Linux installation and indeed when you are root, permissions are ignored. You can set permissions to 000 and it makes no difference with what you can do to it. I didn't know that!

Shep · Joined: 08 Nov 2008 Posts: 840 Location: GIRT-BY-SEA

Yes, operating as root poses a hazard in not having the file permissions recognized!

disciple · Posted: Fri 18 Mar 2011, 20:21 Post subject:

Maybe you can run the game as another user.

PupGeek · Joined: 06 Sep 2009 Posts: 388

Another idea is to make a backup copy of the *rc file named with a .bak extension and write a script to copy the backup copy to the original *rc file before executing the program in question. It will perform as though it didn't write to the *rc file because you keep going back to the earlier one. If you want to be even more sophisticated you can include an option to save any changes the program made or not in the script to run when you close the program. Shell scripting makes almost anything like that doable.

Bruce B · Posted: Sat 19 Mar 2011, 20:42 Post subject:

How to make a file immutable. Root cannot modify it or even delete it.
Except with chattr to put attributes back.

Code block demonstrates

disciple · Posted: Sat 19 Mar 2011, 21:03 Post subject:

I get this error

Bruce B · Posted: Sat 19 Mar 2011, 21:16 Post subject:

disciple · Posted: Sat 19 Mar 2011, 21:27 Post subject:

Bruce B · Posted: Sat 19 Mar 2011, 22:56 Post subject:

disciple · Posted: Sat 19 Mar 2011, 23:15 Post subject:

FWIW if I mount my backup save file (by clicking on it in Rox) it works on files in that.

So I guess it is related to unionfs or something...

disciple · Posted: Sat 19 Mar 2011, 23:35 Post subject:

Ah. Of course. Unionfs is not ext2/3, therefore it does not work. If I go to /initrd/pup_rw then it works.

Bruce B · Posted: Sat 19 Mar 2011, 23:44 Post subject:

jpeps · Joined: 31 May 2008 Posts: 2421

amigo · Joined: 02 Apr 2007 Posts: 1757

"I'll test things by running an actual Linux live CD. But, not a Linux I expect to be crippled or missing standard functions."