#!/bin/bash
#
# iSCSI update script for LTSP
# http://www.ltsp.org
#
# 2013, Joshua Trimm <enslaver@enslaver.com>
#
# It requires the Linux target framework found at http://stgt.sourceforge.net/
# 

export BASE=${BASE:-/opt/ltsp}                # LTSP base directory
MODULES_BASE=${MODULES_BASE:-/usr/share/ltsp} # our modules place

SCRIPT=iscsi-update
# Source the ltsp server functions for vendor detect
. ${MODULES_BASE}/ltsp-server-functions
name=${name:-$(detect_arch)}
imgdir=$BASE/images

VENDOR=${VENDOR:-"$(detect_vendor)"}          # Linux distribution

if [ ! -f /etc/tgt/targets.conf ]; then
    echo "No /etc/tgt/targets.conf file found. Please install scsi-target-utils by running: yum install scsi-target-utils"
    exit 1
fi

confirm_chroot() {
    if [ -z $ROOT ]; then
        echo "ERROR: ROOT is not defined."
        exit 1
    fi
    if [ ! -e $ROOT/bin/true ]; then
        [ "$1" = "--return-on-fail" ] && return 1
        echo "ERROR: $ROOT is not a valid chroot."
        exit 1
    fi
    return 0
}

#DIRS=$(find $BASE -type d -maxdepth 1 -print)

unset update_conf
tid=0
tid=$(tgtadm --lld iscsi --op show --mode target|grep Target|wc -l)

for files in $imgdir/*.img ; do
    tid=$((tid+1))
    target=$(basename ${files/.*//})
    echo $target
    targetname=$(/sbin/iscsi-iname)
    tgtadm --lld iscsi --op new --mode logicalunit --tid $tid --lun 1 -b $files && update_conf=1
done

if [ -n "$update_conf" ]; then
    mkdir -pq /etc/tgt/conf.d
    grep -v "conf.d/ltsp.conf" /etc/tgt/targets.conf > /etc/tgt/targets.conf.tmp
    echo "include /etc/tgt/conf.d/*.conf" >> /etc/tgt/targets.conf.tmp
    mv /etc/tgt/targets.conf.tmp /etc/tgt/targets.conf
    tgt-admin --dump > /etc/tgt/conf.d/ltsp.conf
    /sbin/service tgtd restart
fi
    



# Write's the pxelinux.cfg
ISCSI_TARGET="iqn.2008-0.com.ltsp:server"
ISCSI_SERVERIP="192.168.67.1"

sed -e "s/{ISCSI-TARGET}/$ISCSI_TARGET/g; s/{ISCSI-SERVERIP}/$ISCSI_SERVERIP/g" << EOF | sudo tee /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default.iscsi

DEFAULT linux
 LABEL linux
 SAY Booting Linux
 KERNEL vmlinuz.ltsp
 APPEND rw initrd=initrd.ltsp init=/sbin/init-ltsp selinux=0 netroot=iscsi:@{ISCSI-SERVERIP}::3260::{ISCSI-TARGET} iscsi_initiator={ISCSI-TARGET} ip=eth0:dhcp ifname=eth0 video=LVDS-1:d rdshell 

EOF