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

[Dale]

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

:-)  :-)