Subject: Re: Clean bit bits
To: None <mouse@Collatz.McRCIM.McGill.EDU>
From: Charles M. Hannum <mycroft@NetBSD.ORG>
Date: 01/12/1996 17:11:08
You can't normally open the device for writing if it's mounted under
NetBSD (you have to be running with securelevel<1, which means either
single-user or insecure). (This is't perfect; you can still open other
partitions that overlap the one in question.)
But the main question I have about this is: how does fsck get exempted
from this? It opens the device for writing, after all.
1) It's run with securelevel <= 0.
2) It's run with the file system mounted read-only, and it does a
MNT_RELOAD when it's finished, so it's `safe' (assuming it doesn't