And here is the cleaner version on gentoo.org. http://forums.gentoo.org/viewtopic.php?p=1852877#1852877
Jason
We the willing, led by the unknowning, are doing the impossible, for the ungrateful. We have done so much, for so long, with so little. We are now qualified to do anything with nothing.
On Tue, 7 Dec 2004, Jason Clark wrote:
Hey gang, just thought I would post this quick and dirty on how to build gentoo from stage 1 inside of a 2.6.9-bb4 UML. BTW, the bb4 patch seems to be really solid. I haven't run into a single issue with it thus far.
Building gentoo from stage 1 inside a UML First create root_fs (creates a 2gig sparse file) dd of=root_fs bs=1024 count=2000000 seek=0 mkfs.ext3 root_fs
mount root_fs mkdir uml mount root_fs uml -o loop
unzip stage1 into root_fs cd uml tar xvjf ../stage1-x86-2004.3.tar.bz2
copy mount, route and ifconfig or ip into root_fs. Note that if you are using the iproute2 package you only need to copy ip and mount over.
cp `which ifconfig` usr/bin
cp `which ip` usr/bin
cp `which mount` usr/bin
cp `which route` usr/bin
unmount uml cd .. umount uml
boot uml, this assumes your host IP is 192.168.1.1. You can build the tuntap stuff by hand if you want, but for an install, the net helper is fine.
linux ubd0=root_fs mem=128M eth0=tuntap,,,192.168.1.1 rw
mount filesystems inside uml mount proc /proc -t proc mount none /dev/pts -t devpts
bring up eth0 using ip ip addr add 192.168.1.111/24 brd + dev eth0 ip link set eth0 up ip route add default via 192.168.1.1
OR
bring up eth0 using ifconfig
ifconfig eth0 192.168.1.111 netmask 255.255.255.0 broadcast 192.168.1.255 up
route add default gateway 192.168.1.1 dev eth0
edit make.conf to look like the following CFLAGS="-O2 -mcpu=i686 -fomit-frame-pointer" CHOST="i386-pc-linux-gnu" CXXFLAGS="${CFLAGS}" FEATURES="-sandbox"
The -sandbox is very important, if you don't do this you will get a bunch of errors like this one
ACCESS DENIED open_wr: /dev/console
The short answer is that we dont really need gentoo to sandbox itself since we aren't in a chroot like stage1 expects but are instead in a full on uml. At this point, you can follow the stage1 build directions without modification. I'll make a purdy version soon. Enjoy!
Jason
We the willing, led by the unknowning, are doing the impossible, for the ungrateful. We have done so much, for so long, with so little. We are now qualified to do anything with nothing.
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