This file is indexed.

/usr/bin/liferea-add-feed is in liferea 1.10.3-1ubuntu1.

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


# This script can be used to automatically add 
# subscriptions to Liferea. Just supply a valid
# and correctly escaped feed URL as parameter.

if [ $# -ne 1 ]; then
	echo "Wrong parameter count!"
	echo ""
	echo "Syntax: $0 <feed URL>"
	echo ""
	exit 1
fi

URL=$1

if ! pgrep -x liferea >/dev/null 2>&1; then
	echo "Liferea is not running! You need to start it first."
	exit 1
fi

/usr/bin/liferea --add-feed "$URL"