#!/bin/sh
# Filename:      /etc/debootstrap/chroot-script
# Purpose:       script executed in chroot when installing Debian via grml-debootstrap
# Authors:       grml-team (grml.org), (c) Michael Prokop <mika@grml.org>
# Bug-Reports:   see http://grml.org/bugs/
# License:       This file is licensed under the GPL v2.
################################################################################

set -e # exit on any error

. /etc/debootstrap/config    || exit 1
. /etc/debootstrap/variables || exit 1

[ -r /proc/1 ] || mount -t proc none /proc

# variable checks {{{

# use aptitude only if it's available
if [ -x /usr/bin/aptitude ] ; then
   APTINSTALL='aptitude -y --without-recommends install '
   APTUPDATE='aptitude update'
else
   APTINSTALL='apt-get --force-yes -y install'
   APTUPDATE='apt-get update'
fi

if [ -z "$STAGES" ] ; then
   STAGES='/etc/debootstrap/stages'
   [ -d "$STAGES" ] || mkdir -p "$STAGES"
fi
# }}}

# helper functions {{{
stage() {
  if [ -n "$2" ] ; then
     echo "$2" > "$STAGES/$1"
     return 0
  elif grep -q done "$STAGES/$1" 2>/dev/null ; then
     echo "[*] Notice: stage $1 has been executed already, skipping execution therefore.">&2
     return 1
  fi
}
# }}}

# define chroot mirror {{{
chrootmirror() {
  [ -n "$KEEP_SRC_LIST" ] && return
  if [ -n "$ISO" ] ; then
     echo "deb $ISO $RELEASE main contrib" > /etc/apt/sources.list
     [ -n "$CHROOTMIRROR" ] && echo "deb $CHROOTMIRROR $RELEASE main contrib non-free" >> /etc/apt/sources.list
  else
    if [ -n "$CHROOTMIRROR" ] ; then
       echo "deb $CHROOTMIRROR $RELEASE main contrib non-free" > /etc/apt/sources.list
    fi
  fi
}
# }}}

# set up grml repository {{{
grmlrepos() {
  if [ -n "$GRMLREPOS" ] ; then
     # user might have provided their own apt sources.list
     if ! grep -q grml /etc/apt/sources.list 2>/dev/null ; then
        cat >> /etc/apt/sources.list << EOF

# grml: stable repository:
  deb     http://deb.grml.org/ grml-stable  main
  deb-src http://deb.grml.org/ grml-stable  main

# grml: testing/development repository:
  deb     http://deb.grml.org/ grml-testing main
  deb-src http://deb.grml.org/ grml-testing main

EOF
     fi

     # make sure we have the keys available for aptitude
     gpg --keyserver subkeys.pgp.net --recv-keys F61E2E7CECDEA787
     gpg --export F61E2E7CECDEA787 | apt-key add - || /bin/true # not yet sure
     # why it's necessary, sometimes we get an error even though it works [mika]

     # make sure we install packages from grml's pool only if not available
     # from Debian!
     if ! grep -q grml /etc/apt/preferences 2>/dev/null ; then
        cat >> /etc/apt/preferences << EOF
// debian pool (default):
Package: *
Pin: release o=Debian
Pin-Priority: 996

// main grml-repository:
Package: *
Pin: origin deb.grml.org
Pin-Priority: 991
EOF
     fi
  fi
}
# }}}

# set up kernel-img.conf {{{
kernelimg_conf() {
  if ! [ -r /etc/kernel-img.conf ] ; then
     echo "Setting up /etc/kernel-img.conf"
     cat > /etc/kernel-img.conf << EOF
# Kernel Image management overrides
# See kernel-img.conf(5) for details
do_initrd = Yes
do_symlinks = Yes
EOF
  fi
}
# }}}

# create default devices {{{
makedev() {
  if ! [ -r /dev/hda20 ] ; then
     echo "Creating generic devices in /dev - this might take a while..."
     cd /dev && MAKEDEV generic
  fi
}
# }}}

# make sure services do not start up {{{
install_policy_rcd() {
  if ! [ -r /usr/sbin/policy-rc.d ] ; then
     export POLICYRCD=1
     cat > /usr/sbin/policy-rc.d << EOF
#!/bin/sh
exit 101
EOF
     chmod 775 /usr/sbin/policy-rc.d
  fi
}
# }}}

# install additional packages {{{
packages() {
  # Pre-seed the debconf database with answers. Each question will be marked
  # as seen to prevent debconf from asking the question interactively.
  [ -f /etc/debootstrap/debconf-selections ] && {
    echo "Preseeding the debconf database, some lines might be skipped..."
    cat /etc/debootstrap/debconf-selections | debconf-set-selections
  }

  if [ "$PACKAGES" = 'yes' ] ; then
     if ! [ -r /etc/debootstrap/packages ] ; then
       echo "Error: /etc/debootstrap/packages not found, exiting."
       exit 1
     else
       $APTUPDATE
       DEBIAN_FRONTEND=$DEBIAN_FRONTEND $APTINSTALL $(grep -v '^#' /etc/debootstrap/packages) $GRMLPACKAGES
     fi
  fi
}
# }}}

# install extra packages {{{
extrapackages() {
    if [ "$EXTRAPACKAGES" = 'yes' ] ; then
        PACKAGELIST=$(find /etc/debootstrap/extrapackages -type f -name '*.deb')
        if [ -n "$PACKAGELIST" ]; then
            dpkg -i $PACKAGELIST
            # run apt again to resolve any deps
            DEBIAN_FRONTEND=$DEBIAN_FRONTEND $APTINSTALL
        fi
    fi
}
# }}}

#  sarge specific stuff: mkinitrd {{{
mkinitrd() {
  if [ "$RELEASE" = 'sarge' ] ; then
     sed -i "s#ROOT=probe#ROOT=$TARGET#" /etc/mkinitrd/mkinitrd.conf
  fi
}
# }}}

# install kernel packages {{{
kernel() {
  # do not override $KERNEL if set via config file
  if [ -z "$KERNEL" ] ; then
     if [ "$ARCH" = 'i386' ] ; then
        KERNEL='2.6-686'
     elif [ "$ARCH" = 'amd64' ] ; then
        KERNEL='2.6-amd64'
     fi
  fi

  if [ -n "$KERNEL" ] ; then
     $APTUPDATE
     if [ "$RELEASE" = 'sarge' ] ; then
        KERNELPACKAGES="kernel-image-$KERNEL kernel-headers-$KERNEL"
     else
        KERNELPACKAGES="linux-image-$KERNEL linux-headers-$KERNEL"
     fi
      DEBIAN_FRONTEND=$DEBIAN_FRONTEND $APTINSTALL $KERNELPACKAGES
  fi
}
# }}}

# reconfigure packages {{{
reconfigure() {
  if [ -n "$RECONFIGURE" ] ; then
     for package in $RECONFIGURE ; do
         dpkg --list $package 1>/dev/null 2>/dev/null && \
         DEBIAN_FRONTEND=$DEBIAN_FRONTEND dpkg-reconfigure $package || \
         echo "Warning: $package does not exist, can not reconfigure it."
     done
  fi
}
# }}}

# set password of user root {{{
passwords()
{
  echo "Activating shadow passwords."
  shadowconfig on

  if [ -n "$ROOTPASSWORD" ] ; then
     echo root:"$ROOTPASSWORD" | chpasswd -m
     export ROOTPASSWORD=''
  else
    a='1'
    b='2'
     echo "Setting password for user root:"
     while [ "$a" != "$b" ] ; do
       echo -n "Enter new UNIX password for user root: "
       read -s a
       echo
       echo -n "Retype new UNIX password for user root: "
       read -s b
       echo
       if [ "$a" != "$b" ] ; then
         echo "Sorry, passwords do not match. Retry."
         a='1'
         b='2'
       else
         echo root:"$a" | chpasswd -m
         unset a
         unset b
       fi
     done
  fi
}
# }}}

# set up /etc/hosts {{{
hosts() {
  if ! [ -f /etc/hosts ] ; then
     echo "Setting up /etc/hosts"
     echo "127.0.0.1       localhost  $HOSTNAME" > /etc/hosts
  fi
}
# }}}

# set up /etc/network/interfaces {{{
interfaces() {
  if ! [ -r /etc/network/interfaces ] ; then
     echo "Setting up /etc/network/interfaces"
     cat >> /etc/network/interfaces << EOF

# loopback device:
iface lo inet loopback
auto lo

# eth0:
# iface eth0 inet dhcp
# auto eth0

EOF
  fi
}
# }}}

# adjust timezone {{{
timezone() {
  if [ -n "$TIMEZONE" ] ; then
     echo "Adjusting /etc/localtime"
     ln -sf /usr/share/zoneinfo/$TIMEZONE /etc/localtime
  fi
}
# }}}

# helper function for fstab() {{{
createfstab(){
     echo "Setting up /etc/fstab"
if [ -n "$TARGET_UUID" ] ; then
   echo "/dev/disk/by-uuid/${TARGET_UUID} /  auto    defaults,errors=remount-ro 0   1" > /etc/fstab
else
   echo "${TARGET} /  auto    defaults,errors=remount-ro 0   1" > /etc/fstab
fi

cat >> /etc/fstab << EOF
proc           /proc        proc    defaults                      0   0
/sys           /sys         sysfs   noauto,rw,nosuid,nodev,noexec 0   0
/dev/cdrom     /mnt/cdrom0  iso9660 ro,user,noauto                0   0
# some other examples:
# /dev/sda2       none         swap    sw                   0   0
# /dev/hda1       /Grml        ext3    dev,suid,user,noauto 0  2
# //1.2.3.4/pub   /smb/pub     smbfs   defaults,user,noauto,uid=grml,gid=grml 0 0
# linux:/pub      /beer        nfs     defaults             0  0
# tmpfs           /tmp         tmpfs   size=300M            0  0
EOF
}
# }}}

# generate /etc/fstab {{{
fstab() {
  # set up /etc/fstab if file is not present (cdebootstrap)
  if [ ! -f /etc/fstab  ] ; then
     createfstab
  fi

  # set up /etc/fstab if file is UNCONFIGURED (debootstrap)
  if grep -q UNCONFIGURED /etc/fstab ; then
     createfstab
  fi
}
# }}}

# set up hostname {{{
hostname() {
  if [ -n "$HOSTNAME" ] ; then
     echo "Setting hostname to ${HOSTNAME}."
     echo "$HOSTNAME" > /etc/hostname
  fi
}
# }}}

# generate initrd/initramfs {{{
initrd() {
  # assume the first available kernel as our main kernel
  KERNELIMG=$(ls -1 /boot/vmlinuz-* | head -1)
  KERNELVER=${KERNELIMG#/boot/vmlinuz-}

  # generate initrd
  if [ -n "$INITRD" ] ; then
     if [ "$RELEASE" = 'sarge' ] ; then
        echo "Release sarge detected, will not create an initrd."
     else
        echo "Generating initrd."
        update-initramfs -c -t -k $KERNELVER
        if [ -f "/boot/initrd.img-$KERNELVER" ] ; then
           GRUBINITRD="initrd          /boot/initrd.img-$KERNELVER"
           LILOINITRD="        initrd=/boot/initrd.img-$KERNELVER"
        fi
     fi
  fi
}
# }}}

# grub configuration/installation {{{
grub() {
  if [ -z "$GROOT" ] ; then
     echo "Warning: \$GROOT is not defined, will not adjust grub configuration therefore."
  else
     echo "Adjusting grub configuration for use on ${GROOT}."

     # copy stage-files to /boot/grub/
     [ -d /boot/grub/ ] || mkdir /boot/grub
     # i386 specific:
     [ -d /usr/lib/grub/i386-pc ]   && cp /usr/lib/grub/i386-pc/* /boot/grub/
     # amd64 specific:
     [ -d /usr/lib/grub/x86_64-pc ] && cp /usr/lib/grub/x86_64-pc/* /boot/grub/
     # sarge ships grub files in another directory
     [ "$RELEASE" = 'sarge' ]       && cp /lib/grub/i386-pc/* /boot/grub/

     # finally install grub
     if [ -x /usr/sbin/update-grub ] ; then
        UPDATEGRUB='/usr/sbin/update-grub'
     else
        UPDATEGRUB='/sbin/update-grub'
     fi
     $UPDATEGRUB -y
     if [ -f /boot/grub/menu.lst ] ; then
        sed -i "s/^# groot=.*/# groot=(${GROOT})/g" /boot/grub/menu.lst
	if [ -n "$TARGET_UUID" ] ; then
	   sed -i "s|^# kopt=root=.*|# kopt=root=UUID=${TARGET_UUID} ro ${BOOT_APPEND}|g" /boot/grub/menu.lst
	else
	   sed -i "s|^# kopt=root=.*|# kopt=root=${TARGET} ro ${BOOT_APPEND}|g" /boot/grub/menu.lst
	fi
        # not sure why savedefault does not work for me; any ideas?
        sed -i "s/^savedefault.*/# &/g" /boot/grub/menu.lst
        $UPDATEGRUB -y
     fi
  fi
}
# }}}

# make sure we don't have any running processes left {{{
services() {
  for service in ssh mdadm mdadm-raid ; do
    if [ -x /etc/init.d/"$service" ] ; then
       /etc/init.d/"$service" stop || /bin/true
    fi
  done
}
# }}}

# unmount all filesystems in chroot, make sure nothing is left {{{
finalize() {
  # make sure we don't leave any sensible data
  rm -f /etc/debootstrap/variables
  [ -n "$POLICYRCD" ] && rm -f /usr/sbin/policy-rc.d
  umount -a    1>/dev/null 2>/dev/null || true
  umount /proc 1>/dev/null 2>/dev/null || true
  umount /proc 1>/dev/null 2>/dev/null || true
  umount -a    1>/dev/null 2>/dev/null || true
}
# }}}

# execute the functions {{{
 for i in chrootmirror grmlrepos kernelimg_conf makedev install_policy_rcd \
     packages extrapackages mkinitrd kernel reconfigure hosts interfaces   \
     timezone fstab hostname initrd grub passwords services finalize ; do
    if stage $i ; then
       $i && stage $i done || exit 1
    fi
  done
# }}}

# finally exit the chroot {{{
  echo "Finished chroot installation, exiting."
  exit 0
# }}}

## END OF FILE #################################################################
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