This file is indexed.

/usr/lib/radare/bin/sign 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
if [ -z "$1" ]; then
  echo "Usage: rsc sign /usr/lib/libc.a > libc.sign"
  exit 1
fi

DIR=`mktemp -d`
trap 'rm -rf $DIR' INT
cd $DIR
ar x $1
for a in *.o ; do
  rabin -o d/s/20 $a
done
rm -rf $DIR