1 files changed, 4 insertions, 1 deletions
diff --git a/proc.h b/proc.h
index 39e1c49..6eba566 100644
--- a/proc.h
+++ b/proc.h
@@ -20,7 +20,10 @@ struct proc{
   char *mem; // start of process's physical memory
   unsigned sz; // total size of mem, including kernel stack
   char *kstack; // kernel stack, separate from mem so it doesn't move
-  enum { UNUSED, RUNNABLE, WAITING } state;
+  enum { UNUSED, RUNNABLE, WAITING, ZOMBIE } state;
+  int pid;
+  int ppid;
+  void *chan; // sleep
 
   struct Taskstate ts;  // only to give cpu address of kernel stack
   struct Segdesc gdt[NSEGS];