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I have an embedded system running a busybox distribution and for some reason i can't seem to find my dhclient.conf (http://www.freebsd.org/cgi/man.cgi?query=dhclient.conf&sektion=5) that would let me "protect" resolv.conf wt but DHCP still works, how could that be? Also, is there another way to protect the nameservers in resolv.conf?

abatishchev
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stdcerr
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3 Answers3

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chattr +i /etc/resolv.conf

will help you ;)

That turns special attributes to protect the file for deletion or modification.

Gilles Quénot
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    That gives me this: # chattr +i /etc/resolv.conf chattr: reading flags on /etc/resolv.conf: Inappropriate ioctl for device my root disk is jffs2 not ext2 - that must be it – stdcerr May 29 '12 at 21:36
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Creating a permission of this file.

chmod 0644 /etc/resolv.conf.

Owner can read and write. 6 Group can read. 4 Others can read. 4

John Rey Flores
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  • but it belongs to root who is also trriggering the pppd call (frrom an init scrip on bootup...) :( is it feasible to make it chmod 444 ? – stdcerr May 29 '12 at 21:55
  • Oh I just see that it doesn't let me set it to anything else, it just stays at 777... hmmm – stdcerr May 29 '12 at 22:20
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Just echoing my nameservers into /etc/resolv.conf after the dial up has been established....

stdcerr
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