using this configuration, password and group files will not be overwritten.

finaloption.txt (text/plain), 1.10 KB, created by syedarmani on 2011-04-21 18:14:53 UTC

use schroot with the following configuration:
/etc/schroot/schroot.conf (on host system; <host> is your username on the host)
[gent00]
description=gentoo
type=directory
directory=/mnt/gentoo
priority=3
users=<host>
groups=<host>,portage
root-users=<host>
root-groups=root,<host>,portage
aliases=gentoo
adding portage user and group on host system:
sudo useradd -M -g portage -s /bin/false -u 250 portage
which adds the following lines to /mnt/gentoo/etc/passwd
portage:x:250:250::/home/portage:/bin/false
and to /mnt/gentoo/etc/group:
portage:x:250:<host>
the schroot command for emerge --sync:
schroot -c gent00 -- emerge --sync
if you get an rsync error like "mkstemp failed .... permission denied", do from inside the chroot:
chown -R 250 usr/portage
for classic chrooting:
sudo mount --bind /dev /mnt/gentoo/dev
sudo mount --bind /dev/pts /mnt/gentoo/dev/pts
sudo mount --bind /proc /mnt/gentoo/proc
sudo mount --bind /sys /mnt/gentoo/sys
sudo cp /etc/resolv.conf /mnt/gentoo/etc/resolv.conf #(not sure if this does anything; /etc/resolv.conf is blank except for a comment)
sudo chroot /mnt/gentoo