shift 2
cd /tmp
-rm -rf "/tmp/${app}_backup"
+rm -rf "${app}_backup"
+mkdir "${app}_backup"
service "${app}" stop
-su postgres -lc "pg_dump -d ${db_name} --format=custom -f ${app}_backup/pgdump"
+su postgres -lc "pg_dump -d ${db_name} --format=custom -f ${app}_backup/${db_name}.pgdump"
for target in "$@"; do
cp -a "${target}" "${app}_backup${target}"
done