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#!/bin/bash
#
###############################################################
#
# Installes the LiveCD on local harddisk
# 
# Boot LiveCD and run this script as root
#
# Urs Beyerle, PSI
#
###############################################################


###############################################################
# Definitions
###############################################################

# files which should be restored from .ori files
FILES_RESTORE="/etc/init.d/netfs \
           /etc/init.d/autofs \
           /etc/init.d/halt \
           /etc/init.d/network
           /etc/init.d/functions \
           /etc/rc.d/rc.sysinit \
           /etc/sysconfig/afs \
           /etc/motd \
           /etc/redhat-release \
           /etc/rc.d/rc.local \
           /etc/rc.d/rc.sysinit"

LIVECD_INIT_SCRIPTS="runfirst \
                    runveryfirst \
                    runlast \
                    kudzu-auto"

# Main directories which should be not be copied
DIR_NOT_COPY="/proc \
              /dev \
              /livecd \
              /boot \
              /afs \
              /sys \
              /mnt \
              /media"

# Mount point of the new SL system
NEW=/mnt/harddisk

SCRIPTNAME=$( basename $0 )



###############################################################
# Functions
###############################################################

function usage() {

   ## Usage
   # ----------------------------------------------------------

   cat <<EOF

   $SCRIPTNAME [OPTIONS] -mbr [DEVICE] [PARTITION]

   Installes LiveCD on PARTITION and the boot loader grub
   into the Master Boot Record (MBR) of DEVICE.

   OPTIONS:

    -h                  print this screen
    -swap [partition]   use [partition] as swap
    -nogrub             do not install grub
    -y                  answer all questions with yes

EOF
}


###############################################################
# Main
###############################################################

### are we root?
### -----------------------------------------------------------
if [ "$( whoami )" != "root" ]; then
    echo "Please run this script as root."
    # exit 1
fi


### read options from command-line
### -----------------------------------------------------------
while [ $# -gt 0 ]; do

    case "$1" in
       -h)
            usage; exit;;
       -swap)
            shift; SWAP_PART=$1; shift; continue;;
       -mbr)
            shift; MBR_DEV=$1; shift; continue;;
       -nogrub)
            NOGRUB=$1; shift; continue;;
       -y)
            YES=$1; shift; continue;;

       *)
            INSTALL_PART=$1; break;;
    esac

done
echo


### test if MBR_DEV is given
### -----------------------------------------------------------
if [ ! $NOGRUB ]; then
    if [ ! $MBR_DEV ]; then
        echo "No MBR device defined - where should grub be installed?"
        echo "Please see '$SCRIPTNAME -h'."; echo
        exit 1
    fi
fi


### test if $INSTALL_PART defined and exists
### -----------------------------------------------------------
if [ ! $INSTALL_PART ]; then
    echo "No partition defined for installation"
    echo "Please see '$SCRIPTNAME -h'."; echo
    exit 1
fi


### test if $INSTALL_PART exists
### -----------------------------------------------------------
fdisk -l | cut -d" " -f1 | grep -q "^${INSTALL_PART}$"
if [ "$?" != "0" ]; then
    echo "Partition $INSTALL_PART not found! (see 'disk -l')"; echo
    exit 1
fi


### set $INSTALL_DEV (eg. /dev/sda)
### -----------------------------------------------------------
INSTALL_DEV=$( echo "$INSTALL_PART" | sed -e 's%\([sh]d[a-z]\)[0-9]*$%\1%' )
INSTALL_PART_NR=$( echo "$INSTALL_PART" | sed -e 's%.*/[sh]d[a-z]\([0-9]*\)$%\1%' )


### test if $SWAP_PART exists
### -----------------------------------------------------------
if [ $SWAP_PART ]; then
    fdisk -l | cut -d" " -f1 | grep -q "^${SWAP_PART}$"
    if [ "$?" != "0" ]; then
        echo "Swap partition $SWAP_PART not found! (see 'disk -l')"; echo
        exit 1
    fi
    fdisk -l | grep "Linux swap" | cut -d" " -f1 | grep -q "^${SWAP_PART}$"
    if [ "$?" != "0" ]; then
        echo "Partition $SWAP_PART is not a Linux swap partition! (see 'disk -l')"; echo
        exit 1
    fi
fi


### print warning
### -----------------------------------------------------------
echo "-----------------------------------------------------------"
echo "   LiveCD will be installed on partition $INSTALL_PART."
[ "$SWAP_PART" ] && echo " Partition $SWAP_PART will be used as swap partition."

echo
[ ! $NOGRUB ] && echo " !! Master Boot Record of $MBR_DEV will be overwritten !!"

echo "     !! All data on $INSTALL_PART will be lost !!"
echo "-----------------------------------------------------------"
echo


### continue ?
### -----------------------------------------------------------
if [ ! $YES ]; then
    echo -n "Continue (y/N)? "
    read -n 1 key
    echo
    [ "$key" != "y" ] && exit 0
fi
echo


### format $INSTALL_PART
### -----------------------------------------------------------
echo -n "Format $INSTALL_PART, please wait ... " 
mkfs.ext3 -q $INSTALL_PART || exit 1
echo "done."; echo


### mount $INSTALL_PART
### -----------------------------------------------------------
echo -n "Try to mount $INSTALL_PART to $NEW ... "
mkdir -p $NEW
mount $INSTALL_PART $NEW || exit 1
echo "done."; echo


### copy root dirs
### -----------------------------------------------------------
echo "Copy Live System to $INSTALL_PART:"
root_dirs=$( ls / )
for dir in $root_dirs; do
    # check if dir is not in $DIR_NOT_COPY
    do_not_copy=""
    for not_dir in $DIR_NOT_COPY; do
        if [ "$not_dir" = "/$dir" ]; then 
            do_not_copy="yes"
            break
        fi
    done
    # do not copy links
    [ -L /$dir ] && do_not_copy="yes"

    if [ ! $do_not_copy ]; then
        echo -n "  * Copy  /$dir ... "
        cp -a /$dir $NEW
        echo "done."
    fi
done
echo


### move /usr/opt back to /opt
### -----------------------------------------------------------
if [ -d $NEW/usr/opt ]; then
    echo -n "Move /opt back ... "
    mv $NEW/usr/opt $NEW/
    echo "done."; echo
fi


### create dirs which were not copied
### -----------------------------------------------------------
for dir in $DIR_NOT_COPY; do
    mkdir $NEW/$dir
done
rmdir $NEW/livecd $NEW/mnt


### copy back original files
### -----------------------------------------------------------
echo -n "Restore original files ... " 
for file in $FILES_RESTORE; do
    [ -r $NEW/${file}.ori ] && cp -a $NEW/${file}.ori $NEW/${file} 
done
echo "done."; echo


### do some mounts for chroot $NEW
### -----------------------------------------------------------
mount --bind /dev $NEW/dev
mount --bind /sys $NEW/sys 
mount -t proc proc $NEW/proc


### install grub
### -----------------------------------------------------------
echo "Run grub-install: "; echo
mkdir -p $NEW/boot/grub
grub-install --root-directory=$NEW $MBR_DEV
echo "done."; echo


### define kernel version
### -----------------------------------------------------------
rpm --quiet -q kernel     && UP_installed=true
rpm --quiet -q kernel-smp && SMP_installed=true
[ $UP_installed ]  && KERNEL_VERSION=$( rpm -q --qf "%{V}-%{R}" kernel 2>/dev/null )
[ $SMP_installed ] && KERNEL_VERSION=$( rpm -q --qf "%{V}-%{R}" kernel-smp  2>/dev/null )
if [ ! $KERNEL_VERSION ]; then
    echo "ERROR: Kernel version could not be determined - installation failed"; echo
    exit 1
fi    

### convert dev syntax to grub syntax
### -----------------------------------------------------------
device_map=$NEW/boot/grub/device.map
GRUB_INSTALL_DEV=$( grep $INSTALL_DEV $device_map | awk '{ print $1 }' )
GRUB_ROOT_PART=$( echo "$GRUB_INSTALL_DEV" | sed "s%)$%,`expr $INSTALL_PART_NR - 1`)%" )


### define active Windows partition -  to be fixed  !!!
### -----------------------------------------------------------
WIN_installed=true
GRUB_WIN_PART=(hd0,0)


### create grub.conf file
### -----------------------------------------------------------
echo "Create grub.conf"

cat > $NEW/boot/grub/grub.conf <<EOF
# grub.conf generated by $SCRIPTNAME
default=0
timeout=5
splashimage=$GRUB_ROOT_PART/boot/grub/splash.xpm.gz
#hiddenmenu
EOF

if [ $UP_installed ]; then
    cat >> $NEW/boot/grub/grub.conf <<EOF
title Scientific Linux (${KERNEL_VERSION})
        root $GRUB_ROOT_PART
        kernel /boot/vmlinuz-$KERNEL_VERSION ro root=$INSTALL_PART
        initrd /boot/initrd-$KERNEL_VERSION.img
EOF
fi

if [ $SMP_installed ]; then
    cat >> $NEW/boot/grub/grub.conf <<EOF
title Scientific Linux (${KERNEL_VERSION}smp)
        root $GRUB_ROOT_PART
        kernel /boot/vmlinuz-${KERNEL_VERSION}smp ro root=$INSTALL_PART
        initrd /boot/initrd-${KERNEL_VERSION}smp.img
EOF
fi

if [ $WIN_installed ]; then
    cat >> $NEW/boot/grub/grub.conf <<EOF
title Windows
        rootnoverify $GRUB_WIN_PART
        chainloader +1
EOF
fi

chmod 600 $NEW/boot/grub/grub.conf
ln -s ../boot/grub/grub.conf $NEW/etc/grub.conf
ln -s ./grub.conf $NEW/boot/grub/menu.lst
echo "done."; echo


### install kernel into /boot
### -----------------------------------------------------------
echo "Install kernel(s)"

[ -e /boot/vmlinuz ]      && BOOT_DIR=/boot
[ -e /boot/boot/vmlinuz ] && BOOT_DIR=/boot/boot

if [ ! $BOOT_DIR ]; then
    echo "ERROR: No kernel found - installation failed"; echo
    exit 1
fi

cp -a $BOOT_DIR/vmlinuz            $NEW/boot/vmlinuz-${KERNEL_VERSION}
cp -a $BOOT_DIR/vmlinuzs           $NEW/boot/vmlinuz-${KERNEL_VERSION}smp  2>/dev/null
cp -a $BOOT_DIR/System.map-*       $NEW/boot/
cp -a $BOOT_DIR/config-*           $NEW/boot/
cp -a $BOOT_DIR/grub/splash.xpm.gz $NEW/boot/grub/
echo "done."; echo


### make initrd
### -----------------------------------------------------------
echo "Create initrd(s)"
if [ $UP_installed ]; then
    chroot $NEW \
    /sbin/new-kernel-pkg --package kernel --mkinitrd --depmod --install ${KERNEL_VERSION}
fi
if [ $SMP_installed ]; then
    chroot $NEW \
    /sbin/new-kernel-pkg --package kernel --mkinitrd --depmod --install ${KERNEL_VERSION}smp
fi
echo "done."; echo


### create /etc/fstab
### -----------------------------------------------------------
cat > $NEW/etc/fstab <<EOF
$INSTALL_PART         /                    ext3    defaults        1 1
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
EOF

if [ $SWAP_PART ]; then
    echo "$SWAP_PART         swap                 swap    defaults        0 0" >> $NEW/etc/fstab
fi


### remove LiveCD init.d scripts
### -----------------------------------------------------------
for file in $LIVECD_INIT_SCRIPTS; do
    rm -f $NEW/etc/init.d/$file
    for n in 0 1 2 3 4 5 6; do
        rm -f $NEW/etc/rc.d/rc${n}.d/*$file
    done
done


### restore cronjobs
### -----------------------------------------------------------
mv /etc/cron_backup/sysstat /etc/cron.d/ 2>/dev/null
mv /etc/cron_backup/00-makewhatis.cron.weekly /etc/cron.weekly/00-makewhatis.cron 2>/dev/null
mv /etc/cron_backup/* /etc/cron.daily/


### umount $INSTALL_PART
### -----------------------------------------------------------
umount $NEW/dev
umount $NEW/sys 
umount $NEW/proc
umount $INSTALL_PART