This file is indexed.

/etc/pam.d/kdm-np is in kdm 4:4.8.2a-0ubuntu4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#
# /etc/pam.d/kdm-np - specify the PAM behaviour of kdm for passwordless logins
#
auth       required     pam_nologin.so
auth       required     pam_env.so readenv=1
auth       required     pam_env.so readenv=1 envfile=/etc/default/locale
session    required     pam_limits.so
@include common-account
@include common-password
@include common-session
auth       required     pam_permit.so