On Sat, May 18, 2013 at 04:02:02PM -0700, Linda Walsh wrote:
> 1) How is one supposed to get the real root device?
> It's not /dev/root -- and on my system /dev/root doesn't even exist.
> (though to be fair, it has in the past -- udev musta got sloppy this time,
> and did point to the real root device). But how can I get /proc to display
> the real root device instead of some fake name.
>
> It's insecure the way it is -- as /dev/root could be "anything"...
I don't think this is util-linux issue. It's more distro specific and
related to kernel & initramfs & udevd.
For example my Fedora 18:
$ findmnt /
TARGET SOURCE FSTYPE OPTIONS
/ /dev/sda4 ext4 rw,relatime,data=ordered
$ df /
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda4 35146488 16233036 17121452 49% /
$ grep ' / ' /proc/mounts
rootfs / rootfs rw 0 0
/dev/sda4 / ext4 rw,relatime,data=ordered 0 0
> 2) I'd like lvm's naming to be available through mount. Ideally, lvm's
> naming would be available in /proc/mounts... At least, though
> in going from /dev/VG/LV => /dev/mapper/VG-LV, that can be
> scripted reliably to get the mount device name.
For example lsblk(8) should be able to convert to the /dev/mapper
format
lsblk -rno NAME /dev/VG/LV
you can also use /dev/VG/LV for findmnt(8), it should be able to
convert the names for /dev/mapper/VG-LV to search for mountpoint.
.. or use /dev/mapper/<name> in your /etc/fstab ;-)
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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