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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}"
. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions
#
export LC_ALL=C
Usage() {
echo "Get the NFS server IP address of some IP address from DRBL setting."
echo "Normally this command is used in DRBL clients."
echo "Usage:"
echo "$(basename $0) IP_ADDRESS"
echo "Ex: $(basename $0) 192.168.1.1"
}
#
while [ $# -gt 0 ]; do
case "$1" in
-*) echo "${0}: ${1}: invalid option" >&2
Usage >&2
exit 2 ;;
*) break ;;
esac
done
# Load config file
if [ -f /etc/diskless-image/config ]; then
. /etc/diskless-image/config
mode="client"
elif [ -f $drbl_common_root/etc/diskless-image/config ]; then
. $drbl_common_root/etc/diskless-image/config
mode="server"
else
exit 1
fi
IP=$1
[ -z "$IP" ] && exit 1
# On client side, just use route to get the default gw, and it's nfsserver
# On server side, get a table to grep.
case "$mode" in
"client")
# On client side
# 1st: try to use the mount status to get the nfs server, e.g.
# 192.168.120.183:/tftpboot/node_root /
# 2nd: Try to use gateway as NFS server
nfsserver_cand="$(LC_ALL=C findmnt -nr -o source --target / | awk -F":" '{print $1}')"
gateway="$(LC_ALL=C route -n | awk '/^0.0.0.0/ {print $2}')"
if `is_valid_IPv4_add "$nfsserver_cand"`; then
nfsserver="$nfsserver_cand"
elif [ -n "$gateway" ]; then
nfsserver="$gateway"
else
echo "NFSSERVER is not found, use default one: \"$nfsserver_default\"." 1>&2
nfsserver=$nfsserver_default
fi
;;
"server")
for i in $NFSSERVER_LIST; do
if [ -n "$(grep -Ew "$IP" $drbl_syscfg/clients-of-${i}.txt 2>/dev/null)" ]; then
nfsserver="$i"
break
fi
done
;;
esac
if [ -n "$nfsserver" ]; then
echo $nfsserver
exit 0
else
exit 1
fi
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