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#!/bin/bash
# Author: Steven Shiau <steven _at_ clonezilla org>
# License: GPL
#
# Load DRBL setting and functions
DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"
. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions
# Basic settings
drblpush_conf="/etc/drbl/drblpush.conf"
HOSTS_OUT="/etc/hosts"
# Functions
get_general_param_in_drblpush_conf() {
local index="$1"
param="$(grep -E "^$index=" $drblpush_conf | sed -e "s/$index=//g")"
echo $param
}
DEV_INT="$(grep "^interface=" $drblpush_conf | sed -e "s/interface=//g")"
# use echo to convert them into one line instead of many lines.
DEV_INT="$(echo $DEV_INT)"
# get_general_param_in_drblpush_conf domain
hostname_prefix="$(get_general_param_in_drblpush_conf hostname)"
if [ -f /etc/hosts ]; then
echo -n "Backup the original /etc/hosts as /etc/hosts.drblsave... "
cp -f /etc/hosts /etc/hosts.drblsave
echo "done!"
fi
#
if ! grep -q -E "^127.0.0.1[[:space:]]+" $HOSTS_OUT; then
cat <<-EOF >> $HOSTS_OUT
127.0.0.1 localhost localhost.localdomain
EOF
fi
#
# Part I: for server
echo "Generate the $HOSTS_OUT... "
for interface in $DEV_INT; do
srv_ip="$(drbl-get-ipadd $interface)"
netmask_sys="$(drbl-get-netmask $interface)"
if grep -q -E "^$srv_ip[[:space:]]+" $HOSTS_OUT; then
# found the old one, replace that
perl -pi -e "s|^$srv_ip\s.*|$srv_ip ${hostname_prefix}${interface}|g" $HOSTS_OUT
else
# old one does not exist, create one
cat <<-EOF >> $HOSTS_OUT
$srv_ip ${hostname_prefix}${interface}
EOF
fi
done
# II: for clients
ALL_IP="$(get-client-ip-list)"
for ip in $ALL_IP; do
# get the hostname from $IP_HOST_TABLE
label="$(LC_ALL=C grep -iEw "^[[:space:]]*${ip}" $IP_HOST_TABLE | awk -F" " '{print $2}')"
if [ -z "$label" ]; then
# Same rules as that in drblpush. i.e. if label is empty, we will use the calculated name based on hostname prefix and IP address.
label_default="${hostname_prefix}""${ip//./-}"
label_assigned="$(get-assigned-hn-by-ip $ip)"
if [ -n "$label_assigned" ]; then
label=$label_assigned;
else
label=$label_default;
fi
fi
if grep -q -E "^$ip$" $HOSTS_OUT; then
# found the old one (only IP with new line ending), replace that
perl -pi -e "s|^$ip$|$ip $label|g" $HOSTS_OUT
elif grep -q -E "^$ip[[:space:]]+" $HOSTS_OUT; then
# found the old one, replace that
perl -pi -e "s|^$ip\s.*|$ip $label|g" $HOSTS_OUT
else
# old one does not exist, create one
cat <<-EOF >> $HOSTS_OUT
$ip $label
EOF
fi
done
echo "done!"
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