This file is indexed.

/lib/live/config/0120-nodm is in live-config 5.20170112+deb9u1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh

## live-config(7) - System Configuration Components
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


#set -e

Cmdline ()
{
	# Reading kernel command line
	for _PARAMETER in ${LIVE_CONFIG_CMDLINE}
	do
		case "${_PARAMETER}" in
			live-config.noautologin|noautologin)
				LIVE_CONFIG_NOAUTOLOGIN="true"
				;;

			live-config.nox11autologin|nox11autologin)
				LIVE_CONFIG_NOX11AUTOLOGIN="true"
				;;

			live-config.username=*|username=*)
				LIVE_USERNAME="${_PARAMETER#*username=}"
				;;
		esac
	done
}

Init ()
{
	# Disables both console and graphical autologin.
	case "${LIVE_CONFIG_NOAUTOLOGIN}" in
		true)
			exit 0
			;;
	esac

	# Disables graphical autologin, no matter what mechanism
	case "${LIVE_CONFIG_NOX11AUTOLOGIN}" in
		true)
			exit 0
			;;
	esac

	# Checking if package is installed or already configured
	if [ ! -e /var/lib/dpkg/info/nodm.list ] || \
	   [ -e /var/lib/live/config/nodm ]
	then
		exit 0
	fi

	echo -n " nodm"
}

Config ()
{
	# autologin
	sed -i -r -e "s|^NODM_ENABLED=.*\$|NODM_ENABLED=true|" \
		  -e "s|^NODM_USER=.*\$|NODM_USER=${LIVE_USERNAME}|" \
	/etc/default/nodm

cat > /tmp/live-config.cfg << EOF
nodm nodm/enabled boolean true
nodm nodm/user string ${LIVE_USERNAME}
EOF

	debconf-set-selections < /tmp/live-config.cfg
	rm -f /tmp/live-config.cfg

	# Avoid xinit
	touch /var/lib/live/config/xinit

	# Creating state file
	touch /var/lib/live/config/nodm
}

Cmdline
Init
Config