[Shell scripting] FTP auto login

#!/bin/bash

#made by sinner_01

#This is FTP auto logging script
#Just specify the directory and the file you want to grab for it

#Example: ./ftplogin 127.0.0.1 /etc passwd

if [ -z $1 ]; then
echo "Enter FTP server!"
exit 1
elif [ -z $2 ]; then
echo "Enter directory name!"
exit 1
elif [ -z $3 ]; then
echo "Enter file name!"
exit 1
fi

HOST=$1
USER=korisnik
PASSWD=lozinka

ftp -ivn <<EOF
open $HOST
user $USER $PASSWD

cd $2
get $3
EOF