LFTP script

#!/bin/bash
login="$USERNAME"
pass="$PASSWORD"
host="$IP/URL"
remote_dir='$/REMOTE/PATH/TO/DOWNLOADS'
local_dir="$/LOCAL/PATH"

base_name="$(basename "$0")"
lock_file="/tmp/$base_name.lock"
trap "rm -f $lock_file; exit 0" SIGINT SIGTERM
if [[ -e "$lock_file" ]]
then
    echo "$base_name is running already."
    exit
else
    touch "$lock_file"
    lftp -p 22 -u "$login","$pass" sftp://"$host" << EOF
    set sftp:auto-confirm yes
    set mirror:use-pget-n 5
    mirror -c -P5 --Remove-source-files --Remove-source-dirs --log="$LOG/FILE/LOCATION" "$remote_dir" "$local_dir"
    quit
EOF
    rm -f "$lock_file";
trap - SIGINT SIGTERM
    exit
fi;