text: #include "u.h"
  #include "../port/lib.h"
  #include "mem.h"
  #include "dat.h"
  #include "fns.h"
  
  void
  cinit(void)
  {
  }
  
  void
  copen(Chan* chan)
  {
  	chan->flag &= ~CCACHE;
  }
  
  int
  cread(Chan*, uchar*, int, vlong)
  {
  	return 0;
  }
  
  void
  cupdate(Chan*, uchar*, int, vlong)
  {
  }
  
  void
  cwrite(Chan*, uchar*, int, vlong)
  {
  }
  