setDNSServers.sh

#!/bin/sh
####################################################################################################
#
# Copyright (c) 2010, JAMF Software, LLC.  All rights reserved.
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#                 notice, this list of conditions and the following disclaimer.
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#                 documentation and/or other materials provided with the distribution.
#               * Neither the name of the JAMF Software, LLC nor the
#                 names of its contributors may be used to endorse or promote products
#                 derived from this software without specific prior written permission.
#
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#       SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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####################################################################################################
#
# SUPPORT FOR THIS PROGRAM
#
#       This program is distributed "as is" by JAMF Software, LLC's Resource Kit team. For more
#       information or support for the Resource Kit, please utilize the following resources:
#
#               http://list.jamfsoftware.com/mailman/listinfo/resourcekit
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#               http://www.jamfsoftware.com/support/resource-kit
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#
#               http://www.jamfsoftware.com/support/resource-kit-sla
#
####################################################################################################
#
# ABOUT THIS PROGRAM
#
# NAME
#	setDNSServers.sh -- Set a DNS server for a specified network interface
#
# SYNOPSIS
#	sudo setDNSServers.sh
#	sudo setDNSServers.sh <mountPoint> <computerName> <currentUsername> <networkInterface>
#							<dnsServer> 
#
# 	If the $networkInterface parameter is specified (parameter 4), this is the Netowrk Interface for
#	which DNS server that will be set.  The expected values for the $networkInterface parameter can
#	be found by running the command:
#
#		networksetup -listallnetworkservices
#
#	If the $dnsServer parameter is specified (parameter 5), this is the DNS server that will be set.
#
# 	If no parameter is specified for parameters 4 and 5, the hardcoded value in the script will be used.
#
# DESCRIPTION
#	This script will set a DNS Server in the network settings for whichever network interface has
#	been specified.
#
####################################################################################################
#
# HISTORY
#
#	Version: 1.1
#
#	- Created by Nick Amundsen on July 11th, 2008
#	- Modified by Nick Amundsen on August 5th, 2008
#
####################################################################################################
#
# DEFINE VARIABLES & READ IN PARAMETERS
#
####################################################################################################


# HARDCODED VALUES ARE SET HERE
networkInterface=""
dnsServer=""


# CHECK TO SEE IF A VALUE WAS PASSED IN PARAMETER 4 AND, IF SO, ASSIGN TO "networkInterface"
if [ "$4" != "" ] && [ "$networkInterface" == "" ];then
    networkInterface=$4
fi

# CHECK TO SEE IF A VALUE WAS PASSED IN PARAMETER 5 AND, IF SO, ASSIGN TO "dnsServer"
if [ "$5" != "" ] && [ "$dnsServer" == "" ];then
    dnsServer=$5
fi

####################################################################################################
# 
# SCRIPT CONTENTS - DO NOT MODIFY BELOW THIS LINE
#
####################################################################################################

if [ "$networkInterface" == "" ]; then
	echo "Error:  No network interface has been specified."
	exit 1
fi

if [ "$dnsServer" == "" ]; then
	echo "Error:  No DNS server has been specified."
	exit 1
fi

OS=`/usr/bin/defaults read /System/Library/CoreServices/SystemVersion ProductVersion | awk '{print substr($1,1,4)}'`

if [[ "$OS" < "10.5" ]]; then
	echo "Setting DNS Server for OS $OS..."
	/System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/networksetup -setdnsservers "$networkInterface" "$dnsServer"
else
	echo "Setting DNS Server for OS $OS..."
	/usr/sbin/networksetup -setdnsservers "$networkInterface" "$dnsServer"
fi