Re: [gentoo-user] What to put in chroot mtab

["J. Roeleveld" <joost@antarean.org>]

On 1 August 2014 15:28:01 CEST, Dale <rdalek1967@gmail.com> wrote:
>Peter Humphrey wrote:
>> On Friday 01 August 2014 14:07:08 I wrote:
>>
>>> I run a couple of chroots on this box to build packages for other
>boxes on
>>> the LAN. So far, I haven't worked out what I should populate
>/etc/mtab with
>>> in each chroot. Is it enough to "grep ext4 /etc/mtab >
>>> /mnt/chroot/etc/mtab"? That catches all the physical partitions, but
>I
>>> imagine I need to add some /proc, /sys and /dev entries as well, but
>is
>>> there a simple formula for doing this?
>> I meant to add that one chroot is 32-bit and the other is 64. The
>host is an 
>> i5 running openrc.
>>
>
>It has been a good while since I used this.  So, make sure it makes
>sense to you before trying this.  This may not work if something has
>changed in the past several years.  Use with caution if at all. 
>
>This is a little script, if you want to call it that, that I used to do
>mine.  It also lists the command to use to do a 32 bit chroot from a 64
>bit rig.  Here it is:
>
>root@fireball / # cat /root/xx.chroot-mount-32bit
>
>
>mount -o bind /dev /mnt/gentoo32/dev
>mount -o bind /dev/pts /mnt/gentoo32/dev/pts
>mount -o bind /dev/shm /mnt/gentoo32/dev/shm
>mount -o bind /proc /mnt/gentoo32/proc
>mount -o bind /proc/bus/usb /mnt/gentoo32/proc/bus/usb
>mount -o bind /sys /mnt/gentoo32/sys
>mkdir -p /mnt/gentoo32/usr/portage/
>mount -o bind /usr/portage /mnt/gentoo32/usr/portage/
>
>
>echo " mounting finished"
>
>echo "run linux32 chroot /mnt/gentoo32 /bin/bash next"
>root@fireball / #
>
>
>You may have different mount points at the very least so edit to match
>what you have.  Again, things could have changed and that no longer
>will
>work.  It may not be a bad idea to let someone who has done this more
>recently to give a thumbs up to that. 
>
>That last command should be:
>
>linux32 chroot /mnt/gentoo32 /bin/bash
>
>Dale
>
>:-)  :-) 

That script is too long :)

cd /mnt/gentoo
mount -o rbind /dev dev
mount -o rbind /sys sys
mount -o rbind /proc proc
cp -L /etc/resolv.conf etc/resolv.conf
cd ..
chroot gentoo /bin/bash

To undo:
cd /mnt/gentoo
umount -l proc sys dev

If you need a 32bit chroot, put linux32 before the chroot like Dale mentioned.

--
Joost
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.