sethostname

#!/bin/bash

current_fqdn=`hostname --fqdn`
server_fqdn=$current_fqdn

#
# Parse options
#
while [ $# -gt 0 ] ; do

	option=$1
	shift
	
	#echo "Process $option"
	
	case "$option" in

	--* )
		echo "Unknown option $option" >&2
		exit 1
	
		;;
	* )
		server_fqdn=$option
		;;
	
	esac
done

server_name=${server_fqdn%%.*}

if [ "x$server_fqdn" != "x$current_fqdn" ] ; then
	echo $server_name > /etc/hostname
	hostname -F /etc/hostname
	
	#
	# We don't use server_ip at the moment...
	#
	if [ "x$server_ip" = "x" ] ; then
		server_ip=`/sbin/ifconfig | grep "inet addr:" | head -n 1 | sed -e 's|.*inet addr:||'`
	fi
	
	if [ "x`echo $current_fqdn | grep '\.'`" != "x" ] && [ "x`grep $current_fqdn /etc/hosts`" != "x" ] ; then
		tmpfile=`mktemp`
		# Remove the current fqdn from /etc/hosts
		(
			grep -v $current_fqdn /etc/hosts
			echo "127.0.0.1	$server_fqdn"
		) > $tmpfile
		mv -f $tmpfile /etc/hosts
		chmod 644 /etc/hosts
	else
		echo "127.0.0.1	$server_fqdn $server_name" >> /etc/hosts
	fi
fi