Formerly pgrp.c.~3~

1 files changed, 4 insertions, 1 deletions

diff --git a/proc/pgrp.c b/proc/pgrp.c
index ea500fee..ea64ede7 100644
--- a/proc/pgrp.c
+++ b/proc/pgrp.c
@@ -371,7 +371,10 @@ join_pgrp (struct proc *p)
     pg->pg_plist->p_gprevp = &p->p_gnext;
   pg->pg_plist = p;
   
-  if (p->p_parent->p_pgrp != pg
+  /* Processes 0 and 1 have no parent; they count as orphaned
+     processes always. */
+  if (p->p_parent
+      && p->p_parent->p_pgrp != pg
       && p->p_parent->p_pgrp->pg_session == pg->pg_session)
     pg->pg_orphcnt++;
 }