Creating test children and daemons

[Andrew Cagney <cagney@redhat.com>]

FYI,

I've committed new code for creating test child (direct decendant of 
TestRunner) and daemon (descendant of process 1, a.k.a. init) 
processes.  The processes can either run code linked in code, or a 
separate process (started via exec).  For instance, and off the top of 
my head, to create a daemon that just exits:

   frysk.sys.ProcessIdentifier pid =
    new frysk.sys.Daemon (new frysk.sys.Execute ()
       {
          public void execute ()
          {
             // This as the main and only thread of the daemon.
             // Beware, there is no java runtime so
             // you really want to implement this as a native
             // method in either C or assembler.
          }
       });

Redirection to a pipe pair is also possible, instead of 
frysk.sys.Daemon, call frysk.sys.DaemonPipePair.  See 
frysk.sys.TestPipePair for more examples.

Andrew