#!/bin/bash
# Steven Shiau <steven _at_ clonezilla org>, Ceasar Sun <ceasar _at_ nchc org tw>
# License: GPL
#
# Loading setting
DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"

. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions

#
check_if_root
# drbl_deploy.conf can only be access by root, so check_if_root should be run first.
. /etc/drbl/drbl_deploy.conf

#
usage() {
  echo "Usage: $0 Options"
  echo "Options:"
  language_help_prompt_by_idx_no
  echo "-h, --host IP_ADDRESS:  Generate the files of host with IP_ADDRESS"
  echo "-k, --keep-files [y/N]: if assigned client files exists, keep newer files or not. Default is NO, i.e. overwrite all."
  echo "-n, --nfsserver IP_ADDRESS:  The nfsserver (IP address) for this client."
  echo "-i, --nisserver IP_ADDRESS:  The nisserver (IP address) for this client."
  echo "-a, --label LABEL:  The hostname of this client."
  echo "-p, --pseudo:  Pseudo mode, just create empty client dir to be used in DRBL SSI mode."
  echo "Example:"
  echo "$0 -l 0 -h 192.168.100.1 -k n -n 192.168.1.254 -a drbl101 -i 192.168.1.254"
}

#
pseudo=
while [ $# -gt 0 ]; do
  case "$1" in
    -h|--host)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  ip="$1"
	  shift
        fi
	;;
    -k|--keep-files)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  keep_client_files="$1"
	  shift
        fi
	;;
    -n|--nfsserver)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  nfsserver="$1"
	  shift
        fi
	;;
    -a|--label)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  label="$1"
	  shift
        fi
	;;
    -i|--nisserver)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  nisserver="$1"
	  shift
        fi
	;;
    -l|--language)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  specified_lang="$1"
	  shift
        fi
	;;
    -p|--pseudo)
	shift
        pseudo=on
	;;
    -*)	echo "${0}: ${1}: invalid option" >&2
	usage >& 2
	exit 2 ;;
    *)	break ;;
  esac
done

#
ask_and_load_lang_set $specified_lang

#
if [ -z "$ip" ]; then
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo "No specified client!"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  usage
  exit 1
fi
# Some checkings
if [ -z "$label" ]; then
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo "No assigned label!"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  usage
  exit 1
fi

# 
if [ -z "$nfsserver" ]; then
  nfsserver="$(drbl-get-nfsserver $ip)"
fi

# if nis server is not assigned, use the nfsserver.
if [ -z "$nisserver" ]; then
  nisserver=$nfsserver
  echo "NIS server is $nisserver"
fi

# checking
if [ -z "$nfs_protocol" ]; then
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo "Unable to find the nfs_protocol!!!"
  echo "Does something go wrong with /etc/drbl/drbl_deploy.conf ?"
  echo "Program terminated!!!"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
   exit 1
fi

# define the variables for fstab
# nfs_client_extra_opt is loaded from drbl.conf
nfs_ver_opt="nfsvers=3"
# If need, you can add "rsize=65536,wsize=65536"
# FSTAB_NFS_ROOT_OPT is for nfs root only. It's actually ro, while due to the service /etc/init.d/checkroot.sh will parse it and judge if it's read-only or not. we have to make it "like" rw, but actually it's ro.
FSTAB_NFS_ROOT_OPT="rw,soft,$nfs_ver_opt,$nfs_protocol,$nfs_client_extra_opt,defaults        0 0"
FSTAB_NFS_RO_OPT="ro,soft,$nfs_ver_opt,$nfs_protocol,$nfs_client_extra_opt,defaults        0 0"
FSTAB_NFS_RW_OPT="rw,hard,intr,$nfs_ver_opt,$nfs_protocol,$nfs_client_extra_opt,defaults        0 0"

#
case "$keep_client_files" in
  y|Y|[yY][eE][sS])
    RSYNC_OPT_EXTRA="-u"
    ;;
  *)
    RSYNC_OPT_EXTRA=""
    ;;
esac

# get the OS_Version and OS_type
check_distribution_name

# varlib_NOT_2_be_copied_2_each_client is loaded from drbl.conf
# prepare the options for rsync to exclude when copy files in
# /tftpboot/node_root/var/lib/* to /tftpboot/nodes/$IP/var/lib/
varlib_opts_common_to_each=""
for iv in $varlib_NOT_2_be_copied_2_each_client; do
  varlib_opts_common_to_each="$varlib_opts_common_to_each --exclude=$iv/ "
done
   
#
echo -n "Creating DRBL client: "
[ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
echo -n "$label $ip... "
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL

mkdir -p $drblroot/$ip
# If pseudo is on, then we finish here.
if [ "$pseudo" = "on" ]; then
  echo "Pseudo client is created for DRBL SSI or clonezilla box mode! done!"
  exit 0
fi

[ ! -d $drblroot ] && mkdir -p -m 700 $drblroot
mkdir -p $drblroot/$ip/root
mkdir -p $drblroot/$ip/dev
rsync -a $RSYNC_OPT_EXTRA $drbl_common_root/etc $drblroot/$ip/
rsync -a $RSYNC_OPT_EXTRA $drbl_common_root/root $drblroot/$ip/

# Let the boot scripts will not try to check filesystems in the client
echo "" > $drbl_common_root/fastboot
# Put a tag for FC3 or newer so that rc.sysinit will know it's a readonly root
case "$OS_type" in
  RH|MDK)
     echo "READONLY=yes" > $drblroot/$ip/etc/sysconfig/readonly-root
     # put an empty file so rc.sysinit won't complain.
     touch $drblroot/$ip/etc/rc.readonly
     ;;
esac

# copy the node_root/var to client,
# we do not have to copy /tftproot/node_root/var/lib/rpm /tftproot/node_root/var/lib/dpkg (big directory!), 
# it will be mounted. i.e. # we just share that for every client.
#rsync -a $RSYNC_OPT_EXTRA --exclude=rpm/ --exclude=dpkg/ $drbl_common_root/var $drblroot/$ip/
rsync -a $RSYNC_OPT_EXTRA $varlib_opts_common_to_each $drbl_common_root/var $drblroot/$ip/
# For nfs statd, the file /var/lib/nfs/state is important, othewise it won't be started in the 1st time in some distribution (like Debian >= 8).
rsync -a $RSYNC_OPT_EXTRA $drbl_common_root/var/lib/nfs/state $drblroot/$ip/var/lib/nfs/
# create those directory excluding in varlib_opts_common_to_each
rsync -a $RSYNC_OPT_EXTRA --include="*/" --exclude="*" $drbl_common_root/var $drblroot/$ip/

# Instead, we need mount point $drblroot/$ip/var/lib/rpm and dpkg
# and $drblroot/$ip/var/spool/mail
# since /var/spool/mail maybe a symbolic dir (Debian-based, it is linked to /var/mail, RH-based, it's a dir), we use "-e" here
for idir in /var/lib/rpm /var/lib/dpkg /var/spool/mail; do
  [ -e $idir ] && mkdir -p $drblroot/$ip/$idir
done

# comment this, now we use "mount -t tmpfs none /dev" in the beginning of 
# initrd, so we will use mknode to create console, null, tty[0-5] runtime
## must have some dev for initrd when boot
#cp -a /dev/console /dev/null /dev/tty[0-5] $drblroot/$ip/dev

# output the file to $ip/etc/fstab
cat <<-FSTAB > $drblroot/$ip/etc/fstab
# No more comment this /, since we use mount.nfs from distribution system, not from busybox any more.
## Comment / to avoid mounting twice, since
## / is already mounted by busybox's mount, which differs
## to the mount in system. Mount options maybe differs, too.
## Therefore if this line is not commented, it will mount again.
## Keep this line here for ref only.
$nfsserver:$drbl_common_root  /       nfs     nolock,$FSTAB_NFS_ROOT_OPT
$nfsserver:$drblroot/$ip/etc      /etc    nfs     $FSTAB_NFS_RW_OPT
$nfsserver:$drblroot/$ip/var      /var    nfs     $FSTAB_NFS_RW_OPT
$nfsserver:$drblroot/$ip/root     /root   nfs     $FSTAB_NFS_RW_OPT
$nfsserver:/usr             /usr        nfs    $FSTAB_NFS_RO_OPT
$nfsserver:/home            /home       nfs    $FSTAB_NFS_RW_OPT
$nfsserver:/var/spool/mail /var/spool/mail       nfs     $FSTAB_NFS_RW_OPT
#none                    /proc           proc    defaults     0 0
tmpfs                   /tmp            tmpfs   nosuid,nodev 0 0
#/dev/fd0                /mnt/floppy     auto    noauto,owner,kudzu 0 0
#/dev/sr0          	/mnt/cdrom      iso9660 iocharset=cp950,noauto,owner,kudzu,ro 0 0
FSTAB
# Only when dir /opt/ exists, drbl-nfs-export will export it, then client should mount it, too.
if [ -d /opt/ ]; then
  cat <<-FSTAB >> $drblroot/$ip/etc/fstab
$nfsserver:/opt             /opt        nfs    $FSTAB_NFS_RO_OPT
FSTAB
fi
# if $ocsroot is not under /home, or if $ocsroot is a mount point, client must mount it.
if [ -z "$(echo $ocsroot | grep -Ew "^/home")" -o \
     -n "$(awk -F" " '{print $2}' /proc/mounts | grep -Ew "$ocsroot")" ]; then
  cat <<-FSTAB >> $drblroot/$ip/etc/fstab
$nfsserver:$ocsroot            $ocsroot       nfs    $FSTAB_NFS_RW_OPT
FSTAB
fi

# no matter it's drbl box or clonezilla box, /var/lib/rpm or /var/lib/dpkg is exported. But when client is clonezilla box and in rc1.d, it won't mount them.
case "$OS_type" in
  RH|MDK|SUSE)
    if [ -d /var/lib/rpm ]; then
    cat <<-FSTAB >> $drblroot/$ip/etc/fstab
$nfsserver:$drbl_common_root/var/lib/rpm /var/lib/rpm       nfs     $FSTAB_NFS_RO_OPT
FSTAB
    fi
    # Generate the /dev/pts, /dev/shm... dir.
    for i in $memfs_dir_in_rh_client_fstab; do
      if LC_ALL=C grep -q -F "$i" /etc/fstab &>/dev/null; then
       LC_ALL=C grep -F "$i" /etc/fstab >> $drblroot/$ip/etc/fstab
      fi
    done
    ;;
  DBN)
    if [ -d /var/lib/dpkg ]; then
    cat <<-FSTAB >> $drblroot/$ip/etc/fstab
$nfsserver:$drbl_common_root/var/lib/dpkg /var/lib/dpkg       nfs     $FSTAB_NFS_RO_OPT
FSTAB
    fi
    ;;
esac

# append /media, /mnt to fstab if necessary
for d in media mnt; do
  if [ -d "$drbl_common_root/$d" ]; then
    cat <<-FSTAB >> $drblroot/$ip/etc/fstab
tmpfs                   /$d          tmpfs   defaults        0 0
FSTAB
  fi
done

# append user assigned dir
for d in $diskless_root_dir_ro_user_add; do
  if [ -d "$drbl_common_root/$d" ]; then
    cat <<-FSTAB >> $drblroot/$ip/etc/fstab
$nfsserver:$d             $d        nfs    $FSTAB_NFS_RO_OPT
FSTAB
  fi
done
for d in $diskless_root_dir_rw_user_add; do
  if [ -d "$drbl_common_root/$d" ]; then
    cat <<-FSTAB >> $drblroot/$ip/etc/fstab
$nfsserver:$d             $d        nfs    $FSTAB_NFS_RW_OPT
FSTAB
  fi
done

# append user assigned local dir
# only when there is setting, we will append the fstab
if [ -n "$(grep -vE "^[[:space:]]*#" $drbl_syscfg/client-append-fstab 2>/dev/null)" ]; then
  echo "" >> $drblroot/$ip/etc/fstab
  echo "# Extra mount point specified in $drbl_syscfg/client-append-fstab" >> $drblroot/$ip/etc/fstab
  # filter the comment lines
  (grep -vE "^[[:space:]]*#" $drbl_syscfg/client-append-fstab; echo) | # make sure there is a LF at the end
  while read dev mnt_pnt others; do
    # create the mount point
    [ ! -d "$drbl_common_root/$mnt_pnt" ] && mkdir -p $drbl_common_root/$mnt_pnt
    # append the fstab for client.
    echo $dev $mnt_pnt $others >> $drblroot/$ip/etc/fstab
  done
fi

# TODO, Debian/RH
# output the file to etc/sysconfig/network for DRBL clients.
case "$OS_type" in
  RH|MDK)
     cat <<-HOSTNAME_END > $drblroot/$ip/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=$label
DOMAINNAME=$domain
GATEWAY=$nfsserver
NISDOMAIN=$nisdomain
HOSTNAME_END
     [ -f "$drblroot/$ip/etc/hostname" ] && echo $label > $drblroot/$ip/etc/hostname
     ;;
  DBN)
     echo $label > $drblroot/$ip/etc/hostname
     echo $nisdomain > $drblroot/$ip/etc/defaultdomain
     ;;
  SUSE)
     echo $label > $drblroot/$ip/etc/HOSTNAME
     echo $nisdomain > $drblroot/$ip/etc/defaultdomain
     echo "default $nfsserver - -" > $drblroot/$ip/etc/sysconfig/network/routes
     ;;
esac

# clean all network setting, since we already set the network in init
if [ -e /etc/debian_version ]; then
  # Debian
  rm -f $drblroot/$ip/etc/network/interfaces
  # Create a dummy file so that hotplug won't complain that.
cat <<-NIC_END > $drblroot/$ip/etc/network/interfaces
# This dummy file is automatically created by DRBL to avoid the warning of hotplug.
# You should *NOT* put any network interface setting here, since it already automatically configured in PXE initrd in this DRBL client, and network service default is not on!!!
NIC_END
elif [ -e /etc/SuSE-release ]; then
  # SuSE
  rm -f $drblroot/$ip/etc/sysconfig/network/ifcfg-eth* 
  # For SuSE, we do not generate dummy NIC conf files since 
  # (1) Until OpenSuSE 10.1 Not config file will be automatically created,
  # (2) The file name is like ifcfg-eth-id-00:0c:29:45:9b:81, based on MAC address, we can not foresee that.
else
  # RH-like
  rm -f $drblroot/$ip/etc/sysconfig/network-scripts/ifcfg-eth* 
  for ethx in $dummy_eth_nics; do
    cat <<-NIC_END > $drblroot/$ip/etc/sysconfig/network-scripts/ifcfg-$ethx
# This dummy file is automatically created by DRBL to avoid it to be recreated..
# You should *NOT* put any network interface setting here, since it already automatically configured in PXE initrd in this DRBL client, and network service default is not on!!!
DEVICE=$ethx
BOOTPROTO=dhcp
ONBOOT=no
NIC_END
  done
fi

cat <<-YPCONF_ETH0 > $drblroot/$ip/etc/yp.conf
domain $nisdomain server $nisserver
YPCONF_ETH0

# Generate the OpenSSH host key for clients. For RH-like, sshd service will 
# generated the keys if they do not exist.
case "$OS_type" in
  DBN)
     drbl-gen-ssh-host-keys generate $ip
     ;;
esac

[ -f "$drblroot/$ip/etc/resolv.conf" ] && rm -f $drblroot/$ip/etc/resolv.conf
for nameserver in $nameserver_; do 
  echo "nameserver $nameserver" >> $drblroot/$ip/etc/resolv.conf
done

# Comment this, it's not necessary now.
#ln -fs $drbl_common_root /tftpboot/$ip

# For client login mode
PASSWD_OPT=""
[ -n "$client_autologin_passwd" ] && PASSWD_OPT="-p $client_autologin_passwd"
case "$login_gdm_opt" in
  "auto_login")
     drbl-login-switch --no-gen-ssi -l $lang --auto --no_nis_update $PASSWD_OPT --host $ip
     ;;
  "timed_login")
     drbl-login-switch --no-gen-ssi -l $lang --timed $timed_login_time --no_nis_update $PASSWD_OPT --host $ip
     ;;
  *)
     drbl-login-switch --no-gen-ssi -l $lang --normal --no_nis_update --host $ip
     ;;
esac

# Now it's not necessary to change client's /etc files when clonezilla start, so
# we can put the ocs related files in client's rc1.d first.
# Here we force to use hardware detect for client's rc1.d
ocs-related-srv --hw-detect on -n $ip put
# put S19ocs-run
# By Ceasar : 
# The reason we can not just sync from $common_root is because FC17/18 can't leave ocs-run linking file in rc*.d and it has already been deleted in $common_root
( cd $drblroot/$ip/$RCX_ROOTDIR/rc1.d/; ln -fs $RCX_REL_INITD/ocs-run S19ocs-run )
if is_systemd_init; then
  ( cd $drblroot/$ip/$RCX_ROOTDIR/rc1.d/; rm -rf S*ocs-run )
fi

# set the root's passwd for clients if set client_root_passwd
[ -n "$client_root_passwd" ] && drbl-client-root-passwd --no-gen-ssi --stdin $client_root_passwd --host $ip