1: - setuid/setgid must effect process
    2:   + test syscalls (getuid) afterwards
    3:   + test core file content
    4: 
    5:   + use UID/GID in access(2), chmod(2), chown(2), link(2)
    6: 
    7: - nice level is process property
    8: 
    9: - rlimit should be process-wide and SIGXCPU should be sent if all threads
   10:   together exceed the limit
   11: 
   12: - getrusage() must return resource utilization for the process
   13: 
   14: 
   15: 
   16: The following are possible optimizations and in no way required:
   17: 
   18: 
   19: - the scheduler should be thread group-aware, i.e., it has to give time to
   20:   the thread group not proportional to the number of threads.