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Date: Tue, 24 Oct 2006 21:09:55 +0200 (MEST)
From: Michiel Boland <michiel@boland.org>
To: freebsd-current@freebsd.org
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Subject: 'ro' option in fstab not recognized?
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Hi. I must be extremely stupid. I have this in my fstab

/usr/local /usr/j/usr/local nullfs ro 0 0

but /usr/j/usr/local still appears to be mounted read-write.

Oh wait, I guess this is also already covered by PR 100164.

Line 197 of sys/mount/mount.c explicitly adds an option "noro".
Looks to me like this makes it impossible to mount *any* file system 
read-only, except by explicitly passing flags to mount.
Surely this is not what fstab was designed for? :)