condition script to set hostname

[#1]

Hi,
need help to write script to set hostname based on some condition
1)check its start with MBP
2)if yes exit
3)if no get asset tag from user and set it as hostname
4)if no asset tag set serial number as hostname
new to Apple/bash script, need some help to write condition statement to compere it
if anyone have doc/link for script language please share it.
flow chart for my script is attached

thanks in advance

[DBrowning · Accepted solution]

Not tested fully but this should get you what you want.

#!/bin/sh

computerName=$(hostname)
echo "$computerlName"
beginHostname=${computerName:0:3}
echo "$beginHostname"
if [ "$beginHostname" = "MBP" ];
then
    echo "Computer Name is already set to: $computerName"
    exit 0
else
    echo "Compuer Name is not set.  Prompting to enter Asset Tag"
    assetTag=$(/usr/bin/osascript <<EOT
    tell application "System Events"
       activate
        set assetTag to text returned of (display dialog "Please type in Asset Tag if known.  Otherwise click cancel" default answer "" with icon 2)
    end tell
EOT
)
fi

if [ "$assetTag" == "" ]; then
    echo "Asset Tag unknown.  Setting Computer name to Serial number"
    name=$(system_profiler SPHardwareDataType | awk '/Serial/ {print $4}')
else
    echo "Setting computer name to Asset Tag"
    name="$assetTag"
fi

echo $name

networksetup -setcomputername $name 
scutil --set LocalHostName $name
scutil --set HostName $name
sudo defaults write /Library/Preferences/SystemConfiguration/com.apple.smb.server NetBIOSName $name

[#3]

Perfect! thank you very much.