auth	[success=2 default=ignore]	pam_unix.so nullok_secure
auth	[success=1 default=ignore]	pam_ldap.so use_first_pass
# here's the fallback if no module succeeds
auth	requisite			pam_deny.so
auth	optional			pam_script.so expose=1
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
auth	required			pam_permit.so
# and here are more per-package modules (the "Additional" block)
auth	optional			pam_cap.so