From owner-freebsd-stable  Tue Dec 21 21:22:28 1999
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From: Gregory Bond <gnb@itga.com.au>
To: John Baldwin <jhb@FreeBSD.ORG>
Cc: freebsd-stable@FreeBSD.ORG, Ben WIlliams <williamsl@Home.Com>
Subject: Re: Re[2]: SOFTUPDATES 
In-reply-to: Your message of Tue, 21 Dec 1999 23:51:32 -0500.
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Date: Wed, 22 Dec 1999 16:22:08 +1100
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> Err, 'mount -u -o ro /' makes root read-only again :)

Really?  This actually works?!!? 

sys/kern/vfs-syscalls.c has
                /*
                 * We only allow the filesystem to be reloaded if it
                 * is currently mounted read-only.
                 */
                if ((SCARG(uap, flags) & MNT_RELOAD) &&
                    ((mp->mnt_flag & MNT_RDONLY) == 0)) {
                        vput(vp);
                        return (EOPNOTSUPP);    /* Needs translation */
                }

Greg,
no expert in kernel stuff...




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