Add error callback (RHBZ#602599).

Read the note in the man page before using this feature.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/guestfs.c b/src/guestfs.c
index 0e4cb73b..1439361d 100644
--- a/src/guestfs.c
+++ b/src/guestfs.c
@@ -183,6 +183,8 @@ struct guestfs_h
   void *                     subprocess_quit_cb_data;
   guestfs_launch_done_cb     launch_done_cb;
   void *                     launch_done_cb_data;
+  guestfs_close_cb           close_cb;
+  void *                     close_cb_data;
 
   int msg_next_serial;
 };
@@ -294,6 +296,10 @@ guestfs_close (guestfs_h *g)
   if (g->verbose)
     fprintf (stderr, "closing guestfs handle %p (state %d)\n", g, g->state);
 
+  /* Run user close callback before anything else. */
+  if (g->close_cb)
+    g->close_cb (g, g->close_cb_data);
+
   /* Try to sync if autosync flag is set. */
   if (g->autosync && g->state == READY) {
     guestfs_umount_all (g);
@@ -1927,6 +1933,14 @@ guestfs_set_launch_done_callback (guestfs_h *g,
   g->launch_done_cb_data = opaque;
 }
 
+void
+guestfs_set_close_callback (guestfs_h *g,
+                            guestfs_close_cb cb, void *opaque)
+{
+  g->close_cb = cb;
+  g->close_cb_data = opaque;
+}
+
 /*----------------------------------------------------------------------*/
 
 /* This is the code used to send and receive RPC messages and (for