From: Peter Krempa <pkrempa@redhat.com>
Date: Wed, 22 Oct 2014 09:27:36 +0000 (+0200)
Subject: qemu: migration: Make check for empty hook XML robust
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=19b1ee42b49b2764f7df23787f4b6022886a612c;p=libvirt.git

qemu: migration: Make check for empty hook XML robust

Also consider whitespace only strings returned from the hook as empty
result.
---

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index e135249fe2..ca70e35294 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -2570,7 +2570,7 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver,
         if (hookret < 0) {
             goto cleanup;
         } else if (hookret == 0) {
-            if (!*xmlout) {
+            if (virStringIsEmpty(xmlout)) {
                 VIR_DEBUG("Migrate hook filter returned nothing; using the"
                           " original XML");
             } else {