[libvirt] [PATCH] virsh: Avoid undefine active interface

[ajia at redhat.com]

* tools/virsh.c: libvirt should check if current interface is active before
  undefine the interface, and don't allow to undefine a active interface.
---
 tools/virsh.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index bd6fea7..899bf25 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -5675,6 +5675,16 @@ cmdInterfaceUndefine(vshControl *ctl, const vshCmd *cmd)
     if (!(iface = vshCommandOptInterface(ctl, cmd, &name)))
         return false;
 
+    if (virInterfaceIsActive(iface)) {
+        vshError(ctl,
+                 _("a active interface like %s cannot be undefined;\n"
+                   "to undefine, first destroy then undefine"
+                   " using its name or MAC address"),
+                 name);
+        virInterfaceFree(iface);
+        return false;
+    }
+
     if (virInterfaceUndefine(iface) == 0) {
         vshPrint(ctl, _("Interface %s undefined\n"), name);
     } else {
-- 
1.7.1