#! /bin/sh
#
# Author:	Matt Zimmerman <mdz@ubuntu.com>
#
### BEGIN INIT INFO
# Provides:          suse-bind-mounts 
# Required-Start:    
# Required-Stop:     
# Default-Start:     S 1 2 3 4 5
# Default-Stop:      0 6
# Short-Description: Script for LTSP client initialization
# Description:
### END INIT INFO

set -e

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DESC="LTSP client setup"
NAME=ltsp-client-setup
SCRIPTNAME=/etc/init.d/$NAME

# Gracefully exit if the package has been removed.
test -f /usr/lib/ltsp/ltsp_functions || exit 0
# Gracefully exit if ltsp_chroot file is not present
#test -f /etc/ltsp_chroot || exit 0

. /lib/lsb/init-functions
. /usr/lib/ltsp/ltsp_functions
. /usr/lib/ltsp/ltsp_config
test -f /etc/default/ltsp-client-setup && . /etc/default/ltsp-client-setup

load_modules() {
    for module in $(env|grep ^MODULE_|sed -e s/^MODULE_[0-9]*\=//|sed -e s/\ /*/);do
        modprobe $(echo $module|tr "*" " ")
    done
}

#configure_console() {
#    if [ -n "$CONSOLE_KEYMAP" ]; then
#        ckbcomp -model pc105 "$CONSOLE_KEYMAP" | loadkeys
#    fi
#}

configure_swap() {
    if  get_boolean "$USE_LOCAL_SWAP" ; then
        # Enable local swap partition if found on local disk
        for part in `sfdisk -l 2>/dev/null | awk '/ 82 / { print $1}'`; do
            swap_devices="$swap_devices $part"
        done
    fi
    if get_boolean "$NBD_SWAP" ; then
        SWAP_SERVER=${SWAP_SERVER:-"$SERVER"}
        NBD_PORT=${NBD_PORT:-"9572"}
        modprobe nbd
        /sbin/nbd-client $SWAP_SERVER $NBD_PORT /dev/nbd0 && swap_devices="$swap_devices /dev/nbd0"
    fi
    if get_boolean "$ENCRYPT_SWAP" ; then
        if [ -x /sbin/cryptsetup ]; then
            modprobe dm_crypt
        else
            echo "ERROR: ENCRYPT_SWAP=Y, but /sbin/cryptsetup not found. disabling swap."
            swap_devices=""
        fi
    fi
    num=0
    for device in $swap_devices ; do
        swap="$device"
        if get_boolean "$ENCRYPT_SWAP" ; then
            if [ -x /sbin/cryptsetup ]; then
                cryptsetup -d /dev/urandom create swap$num $swap && swap="/dev/mapper/swap$num"
                num=$(($num+1))
            fi
        fi
        mkswap $swap
        swapon $swap
    done
}

#configure_resolver() {
#    hostname=$(hostname)
#    if [ "(none)" = "$hostname" ] ; then
#        /etc/init.d/hostname.sh start
#        hostname="$(hostname)"
#    else
#        echo $hostname > /etc/hostname
#    fi
#    cat <<EOF > /etc/hosts
#127.0.0.1 localhost
#127.0.0.2 $hostname
#$SERVER server
#EOF
#    if [ -f /etc/hosts.ltsp ]; then
#        cat /etc/hosts.ltsp >> /etc/hosts
#    fi

#    if [ -n "$DNS_SERVER" ] && [ -n "$SEARCH_DOMAIN" ]; then
#        cat <<EOF > /etc/resolv.conf
#search $SEARCH_DOMAIN
#nameserver $DNS_SERVER
#EOF
#    fi
#}

#configure_printer() {
#    for prn_dev in $(env | awk -F= '$1 ~ /^PRINTER_[0-9]_DEVICE/ { print $1 }'); do
#        prn_no=`echo $prn_dev | cut -f2 -d'_'`
#        /usr/lib/ltsp/start_printer $prn_no &
#    done
#}

#configure_syslog() {
#    cat <<EOF > /etc/syslog.conf
#*.* @${SYSLOG_HOST-$SERVER}
#EOF
#}

configure_fstab() {
  echo "/dev/root       /       unionfs defaults        0       0" > /etc/fstab
  echo "tmpfs           /tmp    tmpfs   defaults,nosuid,nodev 0 0" >> /etc/fstab
  mount /tmp
}

# muzso: preseed() has been modified to only collect commands in a variable
#        and does not pipe them instantly to debconf-communicate
#        We do this at the end in one batch.
#preseed() {
#    question="$1"
#    value="$2"

#    if [ -n "$value" ]; then
#        if [ -n "$debconf_commands" ]; then
#          debconf_commands="${debconf_commands}\n"
#        fi
#        debconf_commands="${debconf_commands}set $question $value"
#        debconf_commands="${debconf_commands}\nfset $question seen true"
#    fi
#}

#configure_x() {
#    if [ -z "$xserver_package" ]; then
#       # set default xserver
#       if [ -d /usr/lib/xorg ]; then
#         xserver_package="xserver-xorg"
#       elif [ -d /usr/share/doc/xserver-xfree86/ ]; then
#         xserver_package="xserver-xfree86"
#       else
#         echo "WARNING: no known xserver detected"
#         return
#       fi
#     fi
#     # set default configuration file
#     case $xserver_package in
#       xserver-xfree86) xserver_config="/etc/X11/XF86Config-4" ;;
#       xserver-xorg) xserver_config="/etc/X11/xorg.conf" ;;
#     esac
#     if [ -n "$XF86CONFIG_FILE" ]; then
#         # User has specified a custom config
#         cp "$XF86CONFIG_FILE" "$xserver_config"
#     else
#       # Autoconfigure
#       if [ -n "$(which xdebconfigurator)" ]; then
#         xdebconfigurator
#       fi
#       # Handle overrides of specific parameters
#       if [ -n "$XSERVER" ] && [ "$XSERVER" != "auto" ]; then
#         preseed $xserver_package/autodetect_video_card "false"
#         preseed $xserver_package/config/device/driver "$XSERVER"
#       fi
#       X_USE_SYNC_RANGES=${X_USE_SYNC_RANGES:-Y}
#       if [ -n "$X_HORZSYNC" ] && [ -n "$X_VERTREFRESH" ]; then
#         preseed $xserver_package/autodetect_monitor "false"
#         preseed $xserver_package/config/monitor/selection-method "Advanced"
#         preseed $xserver_package/config/monitor/vert-refresh "$X_VERTREFRESH"
#         preseed $xserver_package/config/monitor/horiz-sync "$X_HORZSYNC"
#         if [ Y = "$X_USE_SYNC_RANGES" ]; then
#             preseed $xserver_package/config/monitor/use_sync_ranges "true"
#         else
#             preseed $xserver_package/config/monitor/use_sync_ranges "false"
#         fi
#       fi
# 
#       # Color depth preseeding
#       if [ -n "$X_COLOR_DEPTH" ]; then
#         preseed $xserver_package/config/display/default_depth "$X_COLOR_DEPTH"
#       fi
# 
#       # set compatbility for X_VIDEORAM with ltsp 4.x
#       X_VIDEO_RAM=${X_VIDEO_RAM:-"$X_VIDEORAM"}
# 
#       # set video ram
#       if [ -n "$X_VIDEO_RAM" ]; then
#         preseed $xserver_package/config/device/video_ram "$X_VIDEO_RAM"
#       fi
# 
#       # Mouse preseeding options.  Use inputattach if available
#       if [ -n "$X_MOUSE_DEVICE" ] && \
#         [ -n "$X_MOUSE_PROTOCOL" ] && \
#         type inputattach >/dev/null 2>/dev/null && \
#         [ -n "$(echo $X_MOUSE_DEVICE | awk '/\/dev\/ttyS[0-9]/')" ]; then
#           inputattach --"$X_MOUSE_PROTOCOL" "$X_MOUSE_DEVICE" &
#       else
#         if [ -n "$X_MOUSE_DEVICE" ]; then 
#           preseed $xserver_package/config/inputdevice/mouse/port "$X_MOUSE_DEVICE"
#         fi
#         if [ -n "$X_MOUSE_PROTOCOL" ]; then 
#           preseed $xserver_package/config/inputdevice/mouse/protocol "$X_MOUSE_PROTOCOL"
#         fi
#       fi
#       if [ -n "$X_MOUSE_EMULATE3BTN" ]; then
#         preseed $xserver_package/config/inputdevice/mouse/emulate3buttons "$X_MOUSE_EMULATE3BTN"
#       fi
# 
#       X_MODE=$( echo "$X_MODE_0 $X_MODE_1 $X_MODE_2" | sed -r 's/ +/, /g;s/, *$//g')
#       if [ -n "$X_MODE" ]; then
# 	    preseed $xserver_package/config/display/modes "$X_MODE"
#       fi
# 
#       # This require fontserver preseeding to work (Debian bug
#       # #323262, fixed in xorg-x11 version 6.8.99.901.dfsg.1-1).
#       # Also done using code in screen.d/startx and screen.d/ldm until
#       # the xorg-x11 version make it into unstable and testing.
#       if [ Y = "${USE_XFS}" ] ; then
#         if [ -z "${XFS_SERVER}" ] ; then
#           XFS_SERVER="${SERVER}"
#         fi
#         preseed $xserver_package/config/fontpath/fontserver "tcp/${XFS_SERVER}:7100"
#       fi
# 
#       # Make sure xkb values only get preseeded if the variables are actually set
#       # (saves boottime to not call debconf-communicate on every empty value)
#       if [ -n "$XKBLAYOUT" ]; then
#         preseed $xserver_package/config/inputdevice/keyboard/layout "$XKBLAYOUT"
#       fi
#       if [ -n "$XKBMODEL" ]; then
#         preseed $xserver_package/config/inputdevice/keyboard/model "$XKBMODEL"
#       fi
#       if [ -n "$XKBRULES" ]; then
#         preseed $xserver_package/config/inputdevice/keyboard/rules "$XKBRULES"
#       fi
#       if [ -n "$XKBOPTIONS" ]; then
#         preseed $xserver_package/config/inputdevice/keyboard/options "$XKBOPTIONS"
#       fi
#       if [ -n "$XKBVARIANT" ]; then
#         preseed $xserver_package/config/inputdevice/keyboard/variant "$XKBVARIANT"
#       fi
# 
#       # muzso: saving "preseeded" values
#       if [ -n "$debconf_commands" ]; then
#         echo $debconf_commands | debconf-communicate $xserver_package
#       fi
# 
#       # Autoconfigure using dexconf when using xdebconfigurator, or X
#       # package postinst if not.  Using dexconf directly might save
#       # some memory on the client.
#       if [ -n "$(which xdebconfigurator)" ] &&
#          [ "$root_write_method" = "bind_mounts" ]; then
#         # Using dexconf instead of reconfigure to save memory ?
#         dexconf -o $xserver_config
#       else
#         dpkg-reconfigure -fnoninteractive -pcritical $xserver_package
#       fi
#     fi
# }

bind_mounts () {
  # set defaults
  test -z "$tmpfs_dir" && tmpfs_dir=/var/lib/ltsp-client-setup
  test -z "$rw_dirs" && rw_dirs="/var/cache/man /var/lib/xkb /var/lock /var/run /var/log /var/spool /var/tmp /tmp /var/lib/dbus"
  test -z "$copy_dirs" && copy_dirs=""
  test -z "$temp_copy_dirs" && temp_copy_dirs="/var/cache"
  test -z "$bindfiles" && bindfiles="/etc/X11/xorg.conf /etc/fstab /etc/mtab"
  mount -t tmpfs -o mode=0755 tmpfs $tmpfs_dir
  # preserve directory structure
  for d in $rw_dirs ; do
    if [ -d "$d" ]; then
      cd $tmpfs_dir
      tar --no-recursion -cpf - $(find $d -type d 2> /dev/null) 2> /dev/null | tar xpf -
      mount --bind $tmpfs_dir/$d $d
    else
      echo "WARNING: $d does not exist"
    fi
  done  
  # copy contents into tmpfs
  for d in $copy_dirs $temp_copy_dirs; do
    if [ -d "$d" ]; then
      cd $tmpfs_dir
      tar -cpf - $d 2> /dev/null | tar xpf -
      mount --bind $tmpfs_dir/$d $d
    else
      echo "WARNING: $d does not exist"
    fi
  done
  # mount one file on top of another
  for f in $bindfiles ; do
    if [ -e "$f" ]; then
      mkdir -p "$(dirname $tmpfs_dir/$f)"
      cp $f $tmpfs_dir/$f
      mount --bind $tmpfs_dir/$f $f
    else
      echo "WARNING: $f does not exist"
    fi
  done
}

bind_unmounts() {
  for dir in $temp_copy_dirs; do
    umount $dir
    rm -rf $tmpfs_dir/${dir#/}
  done
}

run_rcfiles() {
  for rcfile in $(env | sort | awk -F= '$1 ~ /^RCFILE_/ { print $2 }'); do
    if [ -x "$rcfile" ]; then
      "$rcfile" $@
    fi
  done
}

case "$1" in
  start)
#         log_begin_msg "Setting up LTSP client..."
# 	type usplash_write >/dev/null 2>/dev/null && usplash_write "TIMEOUT 120" || true
#         if [ "$root_write_method" = "bind_mounts" ]; then
          bind_mounts
#         fi
        load_modules || true
#         configure_console || true
#         configure_resolver || true
        configure_swap || true
        configure_fstab || true
#         run_rcfiles || true
#         configure_x || true
#         configure_printer || true

# 	if [ "$root_write_method" = "bind_mounts" ]; then
#           bind_unmounts
#         fi

#         log_end_msg 0
	;;
  stop)
#	echo -n "Stopping $DESC: $NAME"
#	d_stop
#	echo "."
	;;
  restart|force-reload)
	#
	#	If the "reload" option is implemented, move the "force-reload"
	#	option to the "reload" entry above. If not, "force-reload" is
	#	just the same as "restart".
	#
	echo -n "Restarting $DESC: $NAME"
	d_stop
	sleep 1
	d_start
	echo "."
	;;
  *)
	# echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
	echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
	exit 1
	;;
esac

exit 0