“Extending the Operating System at User Level: The UFO Global File System”: www.cs.ucsb.edu/projects/ufo/97-usenix-ufo.ps
Man Page for ptrace
“Secure, User-Level Resource-Constrained Sandboxing”: csdocs.cs.nyu.edu/Dienst/Repository/2.0/Body/ncstrl.nyu_cs/TR1999-795/pdf
