Autokinit for Mac

autokinit.sh

#!/bin/sh -e

autokinitFile=~/Library/LaunchAgents/autokinit.plist

if [ -e "$autokinitFile" ]
then
    echo "autokinit service already exists"
    cat "$autokinitFile"
    read -p "Do you wish to remove it? [yN]: " overwrite
    if [ "$overwrite" = "y" ]
    then
        launchctl unload "$autokinitFile"
        rm "$autokinitFile"
    else
        exit
    fi
fi

read -p "Please enter your kerberos principal (e.g. user@DOMAIN.COM): " principal
kinit --keychain "$principal"

cat >"$autokinitFile" <<END
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
        <key>Label</key>
        <string>autokinit</string>
        <key>LowPriorityIO</key>
        <true/>
        <key>ProgramArguments</key>
        <array>
            <string>/usr/bin/kinit</string>
            <string>$principal</string>
        </array>
        <key>WatchPaths</key>
        <array>
            <string>/etc/resolv.conf</string>
            <string>/var/run/resolv.conf</string>
            <string>/private/var/run/resolv.conf</string>
        </array>
        <key>StartInterval</key>
        <integer>3600</integer>
        <key>RunAtLoad</key>
        <true/>
    </dict>
</plist>
END

launchctl load "$autokinitFile"

echo "Success 😎"