if [ \( x"$BACKUP_DIRS" = x \) -a \( x"$BACKUP_FILES" = x \) ]; then
bailout "Neither BACKUP_DIRS nor BACKUP_FILES specified"
fi
if [ \( x"$BACKUP_DIRS" = x \) -a \( x"$BACKUP_FILES" = x \) ]; then
bailout "Neither BACKUP_DIRS nor BACKUP_FILES specified"
fi