#!/bin/bash -e
# Exit immediately if a simple command fails.

# This script will generate the list $OUTPUT of $HOME (and put it there), 
# using the access rights of $USER.
# The defaults are: ls-R, the anonymous ftp home, the anonymous user of vsftpd.
readonly HOME=/var/ftp/ \
    USER=vsftpd \
    OUTPUT=ls-R

cd "$HOME"

readonly new="$(mktemp "$OUTPUT".XXXX)"
trap 'rm -f "$new"' EXIT

su "$USER" -c 'find -noleaf -printf "%P\n" || true'  --shell /bin/sh &> "$new"
chmod a+r "$new"

mv -f "$new" "$OUTPUT"