File set_postgresql_10.latest.sh of Package dba-postgresql-1015

#!/bin/bash
#set -x
v=`ls -1d 10.? 10.?? 2>/dev/null|cut -d "." -f2 |sort -n |tail -1`
i=`ls -l 10.latest.bak* 2>/dev/null|wc -l`
test -L 10.latest && mv 10.latest 10.latest.bak${i}
rc=`ln -fs 10.${v} 10.latest`
exit $rc