updatehosts.sh

#! /bin/bash
# Script downloads the currently-available hosts file from OurHouse, compares MD5 of the
# downloaded file to the MD5 of the current file. If they do not match, it replaces the
# currently installed file with the downloaded file.

# Checks to see how many (if any) arguments were passed. If two arguments were passed,
# it interprets the first as a username, and the second as a password. If only one was
# passed, it uses the currently logged in user's username, and interprets the passed
# argument as a password. If none are passed, it uses the currently logged in username,
# and prompts for password.

if [ "$1" != '' ] && [ "$2" != '' ]; then
    user_name=$1
    user_password=$2
elif [ "$1" != '' ] && [ "$2" == '' ]; then
    user_name=$USER
    user_password=$1
else
    user_name=$USER
    read -s -p "Password: " user_password
fi
echo -e "\n\n"


# cURLs hosts file from OurHouse
cd $TMPDIR
echo
echo -e `curl -O --ntlm -u 'example.com\'$user_name':'$user_password http://sharepoint.example.com/path/to/hosts/file/hosts.txt`
dl_md5=`md5 -q hosts.txt`
inst_md5=`md5 -q /etc/hosts`

echo -e "\n\nFile on Server Checksum:   "$dl_md5
echo -e "File on Localhost Checksum:    "$inst_md5 "\n"

if [ "$dl_md5" == "$inst_md5" ]; then
    response="is current. No need to update."
    echo -e  "/etc/hosts "$response " \n"
    growlnotify -n /etc/hosts -m  " " $response
else
    response="has been updated."
    sudo cp hosts.txt /etc/hosts
    echo -e  "/etc/hosts "$response " \n"
    growlnotify -n /etc/hosts -m  " " $response
fi

# Deletes the downloaded file
rm hosts.txt