On Fri, Nov 08, 2002 at 02:16:47PM -0500, Matt Zimmerman wrote:
> On Fri, Nov 08, 2002 at 12:24:13PM -0500, Kris Van Hees wrote:
> > I would *love* to see a CMSFS that can support things like device files so
> > we can finally put /dev somewhere other than the root filesystem, so / can
> > truly be made RO. I worked on that using initrd, but cmsfs would be so
> > much nicer (as long as it is efficient). Then again, if devfs keeps going
> > the way it is, the need for a writable /dev may finally disappear! I do
> > fear though that it won't go all the way :(
>
> /dev doesn't prevent / from being read-only. devfs sidesteps this problem
> entirely, and with a normal /dev, device nodes are generally static. If you
> consider it to be useful, it is not too complex to run Linux with a
> read-only root filesystem.
I worked on a RO / before (presented briefly at SHARE in TN), and unfortunately
Linux has (or had - they may have fixed it) a C library that usesthe Unix
domain socket /dev/log for syslog handling, and that one is created dynamically
at each boot. The introduction of devfs and possible changes to glibc may
have removed that limitation (which would be a GOOD thing).
Kris
