Get a password from the macOS key chain

backup.sh

#!/bin/bash

SRCDIR=$HOME/PUT_SOURCE_DIRECTORY_HERE
DSTDIR=$HOME/PUT_DESTINATION_DIRECTORY_HERE
REMOTE_SHARE=PUT_SERVER_NAME_HERE/PUT_NAME_OF_SHARE_HERE
KEYCHAIN_SERVICE_TOKEN=CHANGE_TO_NAME_OF_SERVICE_AS_STORED_IN_KEYCHAIN
USERNAME=ola
PASSWORD=$(security find-generic-password -s $KEYCHAIN_SERVICE_TOKEN -w)

if [ ! -d "$DSTDIR" ]; then
  mkdir -p $DSTDIR
fi

if ! mount | fgrep "on $DSTDIR" > /dev/null; then
  mount_smbfs -s //$USERNAME:$PASSWORD@$REMOTESHARE $DSTDIR
fi

rsync --exclude .git --exclude .DS_Store -vrlptgoD $SRCDIR $DSTDIR

umount $DSTDIR