fork minibug

1 files changed, 3 insertions, 1 deletions

diff --git a/sysproc.c b/sysproc.c
index 4a9c8de..990a426 100644
--- a/sysproc.c
+++ b/sysproc.c
@@ -7,12 +7,14 @@
 int
 sys_fork(void)
 {
+  int pid;
   struct proc *np;
 
   if((np = copyproc(cp)) == 0)
     return -1;
+  pid = np->pid;
   np->state = RUNNABLE;
-  return np->pid;
+  return pid;
 }
 
 int