[Pkg-sysvinit-devel] Bug#623174: Bug#621803: Add support for /run directory

[rleigh]

On Tue, Apr 26, 2011 at 05:12:49PM +0200, Marco d'Itri wrote:
> On Apr 26, rleigh <rleigh at codelibre.net> wrote:
> 
> > > -mount -t tmpfs -o nodev,noexec,nosuid,mode=0755 none /run
> > > +mount -t tmpfs -o "nosuid,size=20%,mode=0755" tmpfs /run
> Why does /run should not be noexec?

If /run/shm is also on /run (not a separate mount), it needs to be
executable.  If they are separate mounts, it does add the noexec
option back:

[mountkernfs.sh]
        # If /run/shm is separately mounted, /run can be safely mounted noexec.
        RUNEXEC=
        if [ yes = "$RAMSHM" ] || read_fstab_entry /run/shm tmpfs; then
            RUNEXEC=',noexec'
        fi
        # TODO: Add -onodev once checkroot no longer creates a device node.
        domount "$MNTMODE" tmpfs shmfs /run tmpfs "-onosuid$RUNEXEC$RUN_OPT"

> > I've added the block above because we can't make an upload of sysvinit/
> > initscripts to unstable until we have an updated initramfs-tools in
> > unstable, or else udev will break.  Therefore in order to have a smooth
> Yes, if /run exists in the initramfs then it needs to be moved to the
> root filesystem.

This is being done by initramfs-tools, and it's working nicely AFAICT.

> > Marco, have you tested this upgrade path?  That is /run in the
> > initramfs and no /run on the rootfs?  Is udev checking for that and
> No, but if the database is not copied to the initramfs then LVM will be
> annoyed.

Which database is this?  Is this something that the LVM scripts need
updating to handle?

> > not using /run in this scenario (or moving the files from /run to
> > /dev/.udev)?  We will need to cope with this for a brief transitional
> > period when initramfs-tools is updated and initscripts is not.
> The udev initscript cannot know if there was a /run/udev in the
> initramfs and it was lost.
> Right now I can't see how to work around this.
> If there is no /run in the initramfs then /dev/.udev/ will be used, and
> since udev 167-3 the udev init script will move it to /run/udev/ (as
> long as /run is a mount point, check the init script).

I just sent a separate mail after doing some testing.  The current logic
in 168-1 does appear to move /run/udev (initramfs) to /dev/.udev when
/run is not present on the host.  Looks good to me.


Regards,
Roger

-- 
  .''`.  Roger Leigh
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