Write operations being performed on file with read-only access

corbis_demon · 08-24-2010, 01:56 AM

Hi,
I'm having this problem wherein the ppp program is altering the /etc/resolv.conf file when connecting.This, despite me having set file permissions to read-only. What could be the problem here? Please advise.

Thymox · 08-24-2010, 07:12 PM

Frequently it is not so much modifying the file as over-writing it with a new one.

What are you using to establish your PPP connection?

--thymox

corbis_demon · 08-25-2010, 03:38 AM

I'm using the pon script that comes along with ppp (I use pon <peer-name> to connect). Now, this isn't the ppp package that comes packaged with Slack. I've compiled it (although the same version).

corbis_demon · 09-01-2010, 08:33 AM

Well, okay, how do I stop a process from overwriting a file?

unSpawn · 09-01-2010, 08:50 AM

'chattr +i /etc/resolv.conf' makes the file immutable. As a side effect this may cause an application to show an error message saying that can't write to the file.

corbis_demon · 09-01-2010, 09:24 AM

I tried doing that, and this is what I got:

Code:

chattr: Inappropriate ioctl for device while reading flags on /etc/resolv.conf

corbis_demon · 09-01-2010, 09:38 AM

I read the man page for chattr and lsattr, and found it's supposed to work on ext2 & ext3 filesystems. I, on the other hand, run reiser. What do I need to do?

unSpawn · 09-01-2010, 11:41 AM

Quote:

Originally Posted by corbis_demon

What do I need to do?

Either 0) change file systems ;-p or 1) try to live with this "feature" or 2) find out which applications write to /etc/resolv.conf, disable any DNS-related options in their configs and see if it works.

jiml8 · 09-01-2010, 01:01 PM

Is reiserfs still supported since Hans got sent up?

corbis_demon · 09-02-2010, 12:53 AM

Okay, I changed some parameters in the /etc/ppp/options file, and now resolv.conf seems to be holding it's own. Appreciate all the help, fellas.