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[SCRIPT] rebootless liveinst - the MudPuddle release



Greetings fellow Fedora developers!

I would like to offer you a first glimpse at a project that I have been
making an _aweful_ lot of noise about over on the fedora-livecd-list.

In the name of release-early-release-often, here is a proof of concept
quality release of what I call a "rebootless livemedia installer".

To cut to the chase, it is meant to live alongside /usr/sbin/liveinst
as /usr/sbin/rliveinst.  It has the same functionality with the
interesting addition that it doesn't require a reboot after installation
completes.

Attached is the abundantly commented bash script rliveinst.  A full
ALPHA QUALITY livecd that includes and fully supports rliveinst is
available at http://g-zyx.org (uploading now, will take a while)

enjoy...

-dmc/jdog

P.S. now I will likely commence work on an anaconda backend that truly
provides the same functionality as /usr/sbin/liveinst... rebootlessly :)
#!/bin/bash
#
# ===========================================
# rliveinst - rebootless live media installer
# ===========================================
# version 0.1-2007.07.14
#
# Copyright 2007 Douglas McClendon <dmc filteredperception org> (&GPLv2)
# http://douglas.mcclendon.org
#
# An example ALPHA quality liveCD can be found at http://g-zyx.org
# with rliveinst pre-installed and fully supported.
# 


#
# Usage
# -----
#
# usage: rliveinst <target_partition>
#        e.g. rliveinst /dev/sda2
#
# Installs liveOS onto target_partition, reboot not needed after completion
#


#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

# 
# Manual
# ------
#
# rliveinst is a program which when run on a supported "liveCD" or similar
# environment, will install that operating system distribution to disk.
# What is unique about rliveinst, is that when installation is complete,
# no reboot is necessary to start working in the installed system.
#
# One such supported system, is the Fedora-7-Live-i686 "liveCD", which
# can be downloaded from 
#
# http://download.fedora.redhat.com/pub/fedora/linux/releases
#
# In order for this program to work, some special steps must be taken
# while booting the liveCD.  A patch is attached in comments at the end
# of this file, which when applied to the livecd-tools also available via
# the above link, can be used to generate a customized version of the
# Fedora-7 liveCD which does not require the following extra steps to
# be used when booting the liveCD.
#
#
# Method for booting the Fedora-7-Live-i686 liveCD to enable rliveinst support
# ----------------------------------------------------------------------------
#
# 1) at the isolinux boot menu screen "Welcome to Fedora-7-Live-i386!", within
#    the 60 second automatic boot timeout, press tab, then type "eshell"
#    without quotes and press enter.
#
# 2) at the "bash-3.2#" prompt, type the following commands
#
# umount /sysroot
#
# dmsetup remove live-rw
#
# echo  0 $( blockdev --getsize /dev/loop119 ) linear /dev/loop119 0 | dmsetup create live-overlay
#
# echo 0 $( blockdev --getsize /dev/loop121 ) snapshot /dev/loop121 /dev/mapper/live-overlay p 8 | dmsetup create live-rw-sub
#
# echo  0 $( blockdev --getsize /dev/mapper/live-rw-sub ) linear /dev/mapper/live-rw-sub 0 | dmsetup create live-rw
#
# mount -n -t ext3 /dev/mapper/live-rw /sysroot
#
# exit
#
# 3) wait for the system to boot, and otherwise behave normally
#
# Method for using rliveinst with the Fedora-7-Live-i686 liveCD
# -------------------------------------------------------------
#
# 3) after booting has finished and you have automatically logged in,
#    open a terminal via the menu: applications -> system tools -> terminal
#
# 4) type "su -"
# 
# 5) retrieve the rliveinst program somehow, perhaps with these commands
#    if the system was able to automatically connect to the internet
#
# urlgrabber http://filteredperception.org/downloads/rliveinst-0.1/rliveinst
# chmod +x ./rliveinst
# 
# 6) run this program.  For instance, to install to the first partition
#    on the first hard drive that the OS discovered, issue this command-
#
# ./rliveinst /dev/sda1
#
# WARNING- THIS COMMAND WILL DESTROY THE CONTENTS OF THAT PARTITION!!!
#

if [ $# -ne 1 ]; then
    echo "usage: rliveinst <target_partition>"
    exit 1
fi

if $( ! echo $1 | grep -q "^\/dev\/sd..$" ); then
    echo "rliveinst: sorry, only /dev/sdXY partitions are currently supported"
    exit 1
else
    targetdisklet=$( echo $1 |sed -e 's/\(\/dev\/sd\)\(.\)\(.\)/\2/' )
    targetpartnum=$( echo $1 |sed -e 's/\(\/dev\/sd\)\(.\)\(.\)/\3/' )
    gtargetpartnum=$(( $targetpartnum - 1 ))
    if [ $targetdisklet == "a" ]; then
	gtargetdisknum=0
    elif [ $targetdisklet == "b" ]; then
	gtargetdisknum=1
    elif [ $targetdisklet == "c" ]; then
	gtargetdisknum=2
    elif [ $targetdisklet == "d" ]; then
	gtargetdisknum=3
    else
	echo "rliveinst: sorry, only /dev/sd[abcd]X partitions are supported"
    fi
fi

echo "rliveinst: beginning install to target: ${1}"

echo "rliveinst: loading mirror configuration"
echo "0 $( blockdev --getsize /dev/mapper/live-rw-sub ) mirror core 2 32 sync 2 /dev/mapper/live-rw-sub 0 $1 0" | dmsetup reload live-rw

echo "rliveinst: activating mirror configuration"
dmsetup resume live-rw

echo "rliveinst: migrating live root filesystem"
done=0
while (( ! $done )); do
    percent_done=$( echo "scale=11;$( dmsetup status live-rw | awk '{print $7}' )" | bc -l )
    percent_done_display=$( echo "scale=2;(${percent_done} * 90 + 2) / 1.0" | bc -l )
    echo "rliveinst: installation progress - ${percent_done_display} %"
    if [ "$percent_done" = "1.00000000000" ]; then
	done=1
    else
	sleep 5
    fi
done

echo "rliveinst: unloading mirror configuration"
echo "0 $( blockdev --getsize $1 ) linear $1 0" | dmsetup reload live-rw
echo "rliveinst: installation progress - 92.50 %"

echo "rliveinst: deactivating mirror configuration"
dmsetup resume live-rw
echo "rliveinst: installation progress - 93.00 %"

echo "rliveinst: freeing livemedia resources: live-rw-sub"
dmsetup remove live-rw-sub

echo "rliveinst: freeing livemedia resources: live-overlay"
dmsetup remove live-overlay
echo "rliveinst: installation progress - 93.50 %"

echo "rliveinst: freeing livemedia resources: overlay image loop device"
losetup -d /dev/loop119

echo "rliveinst: freeing livemedia resources: ext3 os image loop device"
losetup -d /dev/loop121

echo "rliveinst: freeing livemedia resources: squashfs image loop device"
losetup -d /dev/loop120
echo "rliveinst: installation progress - 94.00 %"

echo "rliveinst: expanding root filesystem to largest possible size"
resize2fs -p /dev/mapper/live-rw
echo "rliveinst: installation progress - 96.00 %"

echo "rliveinst: configuring /dev/root symlink"
rm -f /dev/root
ln -s ${1} /dev/root
echo "rliveinst: installation progress - 96.50 %"

echo "rliveinst: configuring fstab"
mv /etc/fstab /tmp/rliveinst.old.fstab

cat<<AEOF> /etc/fstab
$1 /                       ext3    defaults,noatime 0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
sysfs                   /sys                    sysfs   defaults        0 0
AEOF
echo "rliveinst: installation progress - 97.00 %"

echo "rliveinst: making initrd"
mkinitrd /boot/initrd-$(uname -r).img $(uname -r)
echo "rliveinst: installation progress - 98.50 %"

echo "rliveinst: configuring grub"
cat<<BEOF> /boot/grub/grub.conf
default=0
timeout=7
splashimage=(hd0,${gtargetpartnum})/boot/grub/splash.xpm.gz
hiddenmenu
title Rebootlessly Installed Distribution (2.6.21-1.3194.fc7)
        root (hd0,${gtargetpartnum})
        kernel /boot/vmlinuz-2.6.21-1.3194.fc7 ro root=${1} rhgb quiet
        initrd /boot/initrd-2.6.21-1.3194.fc7.img
BEOF
echo "rliveinst: installation progress - 99.00 %"

if [ "$( fdisk -l /dev/sd${targetdisklet} | grep sd${targetdisklet}${targetpartnum} | awk '{print $2}' )" == '*' ]; then 
    echo "rliveinst: target partition is already bootable"
else 
    echo "rliveinst: activating target partition"
    echo -en "a\n${targetpartnum}\nw\n" | fdisk /dev/sd${targetdisklet}
fi

echo "rliveinst: setting ext3 filesystem flag on target partition"
echo -en "t\n${targetpartnum}\n83\nw\n" | fdisk /dev/sd${targetdisklet}

echo "rliveinst: installation progress - 99.50 %"

echo "rliveinst: installing grub bootloader"
cp /usr/share/grub/i386-redhat/*stage* /boot/grub/
echo -en "root (hd${gtargetdisknum},${gtargetpartnum})\nsetup (hd${gtargetdisknum})\n" | grub --batch
echo "rliveinst: installation progress - 100.00 %"


echo "rliveinst: you may now eject or remove the live media"
echo "rliveinst: installation complete, enjoy...                 -dmc"

exit 0

###
### Patch
### -----
###
### Patch to livecd-tools-009-1.fc7 /usr/lib/livecd-creator/mayflower
### to support rliveinst.  Please see /usr/share/doc/livecd-tools-009/README
### for information about how to use livecd-tools to reproduce the Fedora-7
### liveCD.
### 
###
###--- mayflower.orig	2007-07-12 04:08:00.000000000 +0000
###+++ mayflower.lms	2007-07-12 07:35:10.000000000 +0000
###@@ -4,6 +4,8 @@
### #
### # Copyright 2006 David Zeuthen <davidz redhat com>
### #
###+# live_migrate_support by Douglas McClendon <douglas mcclendon org>
###+#
### # Licensed under the GPLv2. See the file COPYING for details. 
### # Inspired by similar programs from a bunch of other distributions.
### #
###@@ -236,6 +238,7 @@
### quiet=0
### shell=0
### eshell=0
###+live_migrate_support=1
### live_ram=0
### check_iso=0
### live_locale=""
###@@ -262,6 +265,9 @@
###     eshell)
###         eshell=1
###         ;;
###+    nolive_migrate_support)
###+        live_migrate_support=1
###+        ;;
###     live_ram)
###         live_ram=1
###         ;;
###@@ -325,6 +331,7 @@
###     echo "rootfstype=\$rootfstype"
###     echo "root_ro=\$root_ro"
###     echo "root_rw=\$root_rw"
###+    echo "live_migrate_support=\$live_migrate_support"
### fi
### 
### waitforsymlink=0
###@@ -561,7 +568,13 @@
###     losetup /dev/loop119 /overlay
### 
###     # set up the snapshot
###-    echo 0 \`blockdev --getsize /dev/loop121\` snapshot /dev/loop121 /dev/loop119 p 8 | dmsetup create live-rw
###+    if [ "x\$live_migrate_support" == "x1" ] ; then
###+        echo  0 \`blockdev --getsize /dev/loop119\` linear /dev/loop119 0 | dmsetup create live-overlay
###+        echo 0 \`blockdev --getsize /dev/loop121\` snapshot /dev/loop121 /dev/mapper/live-overlay p 8 | dmsetup create live-rw-sub
###+        echo  0 \`blockdev --getsize /dev/mapper/live-rw-sub\` linear /dev/mapper/live-rw-sub 0 | dmsetup create live-rw
###+    else
###+        echo 0 \`blockdev --getsize /dev/loop121\` snapshot /dev/loop121 /dev/loop119 p 8 | dmsetup create live-rw
###+    fi
### 
###     # set up new /dev/root symlink
###     rm -f /dev/root
###

#
# gzyx.v0.4.003.2007.07.14.a.iso has a sha1sum of
# db1e6278a09a7251c2e4402ad10974aa0932abf8
#
###
########################################################################
########################################################################
########################################################################
###  Copyright 2007 Douglas McClendon <dmc filteredperception org>   ###
########################################################################
########################################################################
########################################################################
###


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# to attach them to the start of each source file to most effectively
# convey the exclusion of warranty; and each file should have at least
# the "copyright" line and a pointer to where the full notice is found.
# 
#     <one line to give the program's name and a brief idea of what it does.>
#     Copyright (C) 19yy  <name of author>
# 
#     This program is free software; you can redistribute it and/or modify
#     it under the terms of the GNU General Public License as published by
#     the Free Software Foundation; either version 2 of the License, or
#     (at your option) any later version.
# 
#     This program is distributed in the hope that it will be useful,
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#     GNU General Public License for more details.
# 
#     You should have received a copy of the GNU General Public License
#     along with this program; if not, write to the Free Software
#     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
# 
# Also add information on how to contact you by electronic and paper mail.
# 
# If the program is interactive, make it output a short notice like this
# when it starts in an interactive mode:
# 
#     Gnomovision version 69, Copyright (C) 19yy name of author
#     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
#     This is free software, and you are welcome to redistribute it
#     under certain conditions; type `show c' for details.
# 
# The hypothetical commands `show w' and `show c' should show the appropriate
# parts of the General Public License.  Of course, the commands you use may
# be called something other than `show w' and `show c'; they could even be
# mouse-clicks or menu items--whatever suits your program.
# 
# You should also get your employer (if you work as a programmer) or your
# school, if any, to sign a "copyright disclaimer" for the program, if
# necessary.  Here is a sample; alter the names:
# 
#   Yoyodyne, Inc., hereby disclaims all copyright interest in the program
#   `Gnomovision' (which makes passes at compilers) written by James Hacker.
# 
#   <signature of Ty Coon>, 1 April 1989
#   Ty Coon, President of Vice
# 
# This General Public License does not permit incorporating your program into
# proprietary programs.  If your program is a subroutine library, you may
# consider it more useful to permit linking proprietary applications with the
# library.  If this is what you want to do, use the GNU Library General
# Public License instead of this License.
#


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