(fshelp_set_active): Implement new interface.

1 files changed, 36 insertions, 1 deletions

diff --git a/libfshelp/set-active.c b/libfshelp/set-active.c
index af5dcc89..5cf3ec38 100644
--- a/libfshelp/set-active.c
+++ b/libfshelp/set-active.c
@@ -19,13 +19,48 @@
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
 #include "fshelp.h"
+#include <hurd/fsys.h>
 
 error_t
 fshelp_set_active (struct transbox *box,
-		   mach_port_t active)
+		   mach_port_t active,
+		   int excl, int goaway, int flags)
 {
+  error_t error;
+  
+ start_over:
+  if (excl && box->active != MACH_PORT_NULL)
+    return EBUSY;
+  
+  if (goaway && box->active != MACH_PORT_NULL)
+    {
+      fsys_t control;
+
+      error = fshelp_fetch_control (box, &control);
+      if (error)
+	return error;
+      
+      mutex_unlock (box->lock);
+      error = fsys_goaway (control, flags);
+      mutex_lock (box->lock);
+      if (error)
+	{
+	  mach_port_deallocate (mach_task_self (), control);
+	  return error;
+	}
+            
+      /* If it changed while we were unlocked, better start over. */
+      if (box->active != control)
+	{
+	  mach_port_deallocate (mach_task_self (), control);
+	  goto start_over;
+	}
+      mach_port_deallocate (mach_task_self (), control);
+    }
+  
   if (box->active != MACH_PORT_NULL)
     mach_port_deallocate (mach_task_self (), box->active);
+
   box->active = active;
   return 0;
 }