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YaifO - Yet another installer for OpenBSD

Copyright (c) 2007-2011 Michael Erdely <mike at erdelynet dot com>
Copyright (c) 2005 Waldemar Brodkorb <wbx at openbsd-geek dot de>
OpenBSD-current version (c) 2010-2011 Frank Denis <j at pureftpd dot org>
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================

There are some situations where a modified installer for OpenBSD is
useful. For example if you want to remotely install without any 
access to a keyboard or serial terminal. Or you would like to do
a RAID installation, which is not supported by default.
Another example is a fully automatic installations.

At the moment only remote install via Secure Shell is implemented.

There is no binary installer available, you should always compile
it on your own.

Building:
==========
To build and compile the installer you should have the OpenBSD source tree
in /usr/src (or override with SRCDIR variable) and then:
  1. Set the SUDO variable, if necessary (export SUDO=/usr/bin/sudo) if you
     are building yaifo as a non-root user.
  2. make keys
     This will copy /etc/ssh/ssh_host*_key* files and your
     ~/.ssh/authorized_keys files to the current directory for use in the
     image.  Edit as needed.
  3. Edit the config file for your desired network settings.
  4. If serial console redirection is necessary, edit the boot.conf file.
  5. make cleanall (only necessary if yaifo was previously built)
  6. make obj
  7. make

Installation with yaifo.fs:
===========================

Use dd to put the yaifo.fs image on the hard disk. 
Overwriting the root partition of a running OpenBSD system do not work
without single usermode and read-only mounted root partition.
For such installations/upgrades use yaifo.rd with the existing boot
loader.

Example for an OpenBSD system wth a SCSI disk:
# dd if=yaifo.fs of=/dev/rsd0c
# sync
# reboot

Example for a FreeBSD system after forcing disks to read-only and
disabling disk-overwrite protection:
# mount -u -o ro -f -a
# sysctl kern.geom.debugflags=16
# dd if=yaifo.fs of=/dev/da0 bs=512
# reboot

Example for a Linux rescue system and an IDE disk:
# wget http://www.openbsd.de/~wbx/yaifo.fs -O - | dd of=/dev/hda
# sync
# reboot

Or OpenBSD via ftp:
# ftp -o - 192.168.1.2:/yaifo.fs | dd of=/dev/rwd0c
# sync
# reboot

Reboot and connect via ssh root@ip-address and install as normal.

Installation with yaifo.rd:
===========================
You can use yaifo.rd to boot from an installed system or via network. 

Notes on OpenBSD/macppc:
========================
There is no yaifo.fs for macppc.
To use the yaifo.rd from within OS X, copy yaifo.rd and ofwboot to the root
directory in OS X.  Reboot and get into Openfirmware (Cmd,Option,O,F).
Type: boot hd:,ofwboot /yaifo.rd

Notes on OpenBSD/sparc:
=======================
The standard bootloader does not allow RAMDISK's bigger than 3.8 MB, so
you have to use bootloaders compiled with RELOC=0x480000 to boot yaifo images.
For OpenBSD/sparc you need yaifo.net instead of boot.net in your tftpboot
directory. 

Notes on OpenBSD/landisk:
=========================
This is a work in progress and is considered broken at this time.