* grp.cc (initgroups): Call groups::clear_supp to free the

	supplementary group sids that may have been set by setgroups.
	* security.cc (cygsidlist::free_sids): Also zero the class members.
	* security.h (groups::clear_supp): New.
	Rename cygsidlist_unknown to cygsidlist_empty.

1 files changed, 6 insertions, 1 deletions

diff --git a/winsup/cygwin/security.h b/winsup/cygwin/security.h
index 580d7c143..d9bd691f3 100644
--- a/winsup/cygwin/security.h
+++ b/winsup/cygwin/security.h
@@ -86,7 +86,7 @@ public:
     }
 };
 
-typedef enum { cygsidlist_unknown, cygsidlist_alloc, cygsidlist_auto } cygsidlist_type;
+typedef enum { cygsidlist_empty, cygsidlist_alloc, cygsidlist_auto } cygsidlist_type;
 class cygsidlist {
   int maxcount;
 public:
@@ -167,6 +167,11 @@ public:
       sgsids = newsids;
       ischanged = TRUE;
     }
+  void clear_supp ()
+    {
+      sgsids.free_sids ();
+      ischanged = TRUE;
+    }
   void update_pgrp (const PSID sid)
     {
       pgsid = sid;