Need help to umount initrd and mount real file system
Denis Vlasenko
vda.linux at googlemail.com
Tue Feb 6 17:14:20 UTC 2007
On Tuesday 06 February 2007 14:02, Rupesh Gujare wrote:
> hello all,
> thanks for help.. and sorry for not stating my problem clearly
> so finally i was able to change rootfs.. Here is what i did at interactive shell by adding /bin/sh at start in /etc/init.d/rcS:--
>
> mount -t proc none /proc
> mount -t ext2 /dev/sda1 /tmp
> cd /tmp
> umount /proc
> pivot_root . tmp #tmp exist on new-root
> mount -t proc none /proc
> exec chroot . /bin/ash <dev/console > dev/console 2>&1
> exec chroot . /sbin/init <dev/console > dev/console 2>&1
> umount /tmp
>
> BUT HERE I GET ERROR AS:--
> Device or resource busy
Because your current directory is still "old" /
(== "new" /tmp)
> Where I am going wrong?
Example that I posted:
echo "# Chrooting into root fs"
# we expect that /dev/console and /dev/null exist in /new_root/dev
cd /new_root
# making sure we dont keep /dev busy
exec <dev/console >dev/console 2>&1
# proc/ in new root is used here as a temp mountpoint for old root
pivot_root . proc
avoided that by changing to /new_root, detaching stdio from lod /dev
and doing pivot_root while sitting in /new_root.
Why you are not following the example?
--
vda
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