This file is indexed.

/usr/lib/radare/bin/read is in radare-common 1:1.5.2-6.

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
#
TARGET="$1"
OFFSET="$2"
LENGTH="$3"

[ "${TARGET}" = "-h" ] && LENGTH=""
if [ -z "${LENGTH}" ]; then
	echo "Usage: read [file] [offset] [length]"
	exit 1
fi

echo "
seek $OFFSET
b $LENGTH
pX
quit
" | radare -v "${TARGET}"