set-hostname   [plain text]

#!/bin/sh
#
# set-hostname
#

. /etc/hostconfig

get_host()
{
	ifconfig ${primary} inet 2>/dev/null | sed -n '/169\.254/d;/127\.0\.0\.1/d;/0\.0\.0\.0/d;s/^.*inet \([0-9\.]*\) netmask.*/\1/p' | while read ip_address 
	do
		host=$(nslookup ${ip_address} 2>/dev/null | sed -n 's/Name: [ ]*\([^ ]*\)$/\1/p')
		if [ ! "${host}" = "" ] ; then
			echo "${host}"
			break;
		fi
	done
}

get_localhost()
{
	scutil << __END_OF_SCUTIL_COMMAND 2>/dev/null   | \
		sed -n -e 's/.*LocalHostName : \(.*\)/\1.local./p'
open
show Setup:/Network/HostNames
close
quit
__END_OF_SCUTIL_COMMAND
}

if [ ! "${HOSTNAME:=-AUTOMATIC-}" = "-AUTOMATIC-" ] ; then
	hostname "${HOSTNAME}"
	exit 1
fi

primary=$(netstat -rn | sed -n 's/default [ ]*[^ ]*[ ]*[^ ]*[ ]*[^ ]*[ ]*[^ ]*[ ]*\([^ ]*\)[ ]*[^ ]*/\1/p')

if [ ! "${primary}" = "" ] ; then
	host=$(ipconfig getoption "${primary}" host_name)
	if [ "${host}" = "" ]; then
		host=$(get_host)
	fi
fi

if [ "${host}" = "" ]; then
	host=$(get_localhost)
fi

if [ "${host}" = "" ]; then
	host=localhost
fi

logger setting hostname to "${host}"
hostname "${host}"

exit 0