[libvirt] [PATCH] virsh: fix snapshot-create with no xmlfile

[Ján Tomko]

Properly check the return value of vshCommandOptStringReq for xmlfile:
* error out on incorrect input (--xmlfile '')
* use default XML <domainsnapshot/> with no --xmlfile specified

(Broken by commit b2e8585)

Bug: https://bugzilla.redhat.com/show_bug.cgi?id=919826
---
 tools/virsh-snapshot.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/virsh-snapshot.c b/tools/virsh-snapshot.c
index ed41014..d994fd9 100644
--- a/tools/virsh-snapshot.c
+++ b/tools/virsh-snapshot.c
@@ -211,7 +211,9 @@ cmdSnapshotCreate(vshControl *ctl, const vshCmd *cmd)
     if (!(dom = vshCommandOptDomain(ctl, cmd, NULL)))
         goto cleanup;
 
-    if (vshCommandOptStringReq(ctl, cmd, "xmlfile", &from) < 0) {
+    if (vshCommandOptStringReq(ctl, cmd, "xmlfile", &from) < 0)
+        goto cleanup;
+    if (!from) {
         buffer = vshStrdup(ctl, "<domainsnapshot/>");
     } else {
         if (virFileReadAll(from, VSH_MAX_XML_FILE, &buffer) < 0) {
-- 
1.7.12.4