005_Setup_computer_name.sh

echo on
#!/bin/sh
#!/usr/bin/env bash

# File Name:	check_computer_name.sh
# Version:		1.5
# Author:		Jason Bunston, City of Toronto
# Created:		06/02/2016
# Modified:		06/03/2016

if [ "$EUID" -ne 0 ]
then
	printf "Please run as root\n"
	exit
fi

clear
CURRENTMACHOST=$(sudo systemsetup -getcomputername | awk '/Computer Name/{print $NF}')
CURRENTIPHOST=$(sudo hostname)
SCUTILComputerName=$(sudo scutil --get ComputerName)
SCUTILHostName=$(sudo scutil --get HostName)
SCUTILLocalHostName=$(sudo scutil --get LocalHostName)

printf "Current Mac Host:\t\t$CURRENTMACHOST\n"
printf "Current IPhost:\t\t\t$CURRENTIPHOST\n"
printf "SC Util Computername:\t\t$SCUTILComputerName\n"
printf "SC Util HostName:\t\t$SCUTILHostName\n"
printf "SC Util LocalHostName:\t\t$SCUTILLocalHostName\n"
printf "\n"
sleep 1

funct_namecheck ()
{ 
printf "\n"
read -p "Enter new hostname:" FINALHOSTNAME
clear
}

# Check to see if the existing hostname matches the COT standard pattern for Mac Desktops and Notebooks
if [[ $CURRENTMACHOST == [A-Za-z][0-9][Xx][MOmoSs][0-9][0-9][0-9][0-9][0-9][0-9][0-9] ]]; 
then 
	printf "The existing hostname format is OK\n"	
	if [[ $CURRENTMACHOST = [a-z][0-9][x][mo][0-9][0-9][0-9][0-9][0-9][0-9][0-9] ]]; 
	then 
		printf "Setting SystemName" 
		sudo systemsetup -setcomputername $(tr [A-Z] [a-z] <<< "$CURRENTMACHOST") > /dev/null 2>&1
		sudo scutil --set ComputerName $(tr [A-Z] [a-z] <<< "$CURRENTMACHOST") > /dev/null 2>&1
		sudo scutil --set HostName $(tr [A-Z] [a-z] <<< "$CURRENTMACHOST") > /dev/null 2>&1
		sudo scutil --set LocalHostName $(tr [A-Z] [a-z] <<< "$CURRENTMACHOST") > /dev/null 2>&1
		printf "Setting Hostname" 
		sudo hostname $(tr [A-Z] [a-z] <<< "$CURRENTMACHOST") >/dev/null 2>&1 > /dev/null 2>&1
	fi
else
	# Name format hasn't passed the check - we now ask for a new hostname to be entered, and validate it
	printf "The current hostname does not adhere to the COT naming convention\n\n"
	printf "Current System Name: $CURRENTMACHOST \n\n"
	printf "This system must be renamed now\n"
	while true; 
	do
		funct_namecheck
		if [[ $FINALHOSTNAME == [A-Za-z][0-9][Xx][MOmoSs][0-9][0-9][0-9][0-9][0-9][0-9][0-9] ]]
		then
			printf "The hostname you've entered passed the format test: $FINALHOSTNAME is OK\n"
			break
		else
			Clear
			printf "The hostname format your entered does not follow the COT Standard - please try again\n"
			printf "NOTE: the format allowed must follow this convention:\n\n"
			printf "(Divisional Prefix) + (X) + (Hardware type - M or O) + (Seven Digit Asset Tag #) \n\n"
			printf "IE:\tJ2XM1234567 \n \tD1XO1234567 \n \tK4XM1234567 \n"
			printf "\t...are all acceptable formats\n"
		fi
	done
	
	# Check to see if the changes have been successuly applied.	
	if [[ $FINALHOSTNAME != $CURRENTMACHOST ]]; 
	then 
		printf "Applying new hostname\n"
		# IF current hostname doesn't match the target hostname make it so	
		sudo systemsetup -setcomputername $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME")  > /dev/null 2>&1
		# Apply new computer name to Mac IP Hostname
		sudo hostname $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME")
		sudo scutil --set ComputerName $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME") > /dev/null 2>&1
		sudo scutil --set HostName $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME") > /dev/null 2>&1
		sudo scutil --set LocalHostName $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME") > /dev/null 2>&1
	fi
fi

# Double Check to see if the changes have been successuly applied.	

CURRENTMACHOST=$(sudo systemsetup -getcomputername | awk '/Computer Name/{print $NF}')
CURRENTIPHOST=$(sudo hostname)
SCUTILComputerName=$(sudo scutil --get ComputerName)
SCUTILHostName=$(sudo scutil --get HostName)
SCUTILLocalHostName=$(sudo scutil --get LocalHostName)

# If not, then reset those final name changes.	
if [[ $CURRENTMACHOST != $CURRENTIPHOST ]]; 
then 
	printf "System name and IP Hostname weren't synced - enforcing"
	sudo hostname $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME") > /dev/null 2>&1
	sudo scutil --set ComputerName $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME") > /dev/null 2>&1
	sudo scutil --set HostName $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME") > /dev/null 2>&1
	sudo scutil --set LocalHostName $(tr [A-Z] [a-z] <<< "$FINALHOSTNAME") > /dev/null 2>&1
fi
# Print out the final name changes for all to see.	
printf "\n"
if [[ $FINALHOSTNAME != "" ]];
	then
	printf "Target Global Hostname:\t\t$FINALHOSTNAME\n"
	printf "\n"
	printf "Current System Name:\t\t$CURRENTMACHOST\n"
	printf "Current IP Hostname:\t\t$CURRENTIPHOST\n"
	printf "\n"
	printf "Scutil Computername:\t\t$SCUTILComputerName\n"
	printf "Scutil HostName:\t\t$SCUTILHostName\n"
	printf "Scutil LocalHostName:\t\t$SCUTILLocalHostName\n"
fi