From: Matthias Bolte <matthias.bolte@googlemail.com>
Date: Thu, 21 Jul 2011 13:16:11 +0000 (+0200)
Subject: xenapi: Improve error reporting in xenapiOpen once again
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=484460ec4678a264c5e7355495c2f0da72cb42bd;p=libvirt.git

xenapi: Improve error reporting in xenapiOpen once again

privP->session->error_description is a list and in order to get the
complete error message all parts of the list should be concatenated.
xenapiSessionErrorHandler does this when its third parameter is NULL.
The current code discards all but the first part of the error message
resulting in a potentially incomplete error message.

This partly reverts 006be75ee214f9b4, that tried to avoid reporting
a (null) in the error message. The actual problem is more general in
returnErrorFromSession that might return NULL if there is no error.

Make sure that returnErrorFromSession return non-NULL always. Also
don't skip the last error message part.
---

diff --git a/src/xenapi/xenapi_driver.c b/src/xenapi/xenapi_driver.c
index 39464554e7..975fd47135 100644
--- a/src/xenapi/xenapi_driver.c
+++ b/src/xenapi/xenapi_driver.c
@@ -194,10 +194,7 @@ xenapiOpen (virConnectPtr conn, virConnectAuthPtr auth,
         return VIR_DRV_OPEN_SUCCESS;
     }
 
-    xenapiSessionErrorHandler(conn, VIR_ERR_AUTH_FAILED,
-                              *privP->session->error_description != NULL ?
-                              *privP->session->error_description :
-                              _("unknown error"));
+    xenapiSessionErrorHandler(conn, VIR_ERR_AUTH_FAILED, NULL);
 
   error:
     VIR_FREE(username);
diff --git a/src/xenapi/xenapi_utils.c b/src/xenapi/xenapi_utils.c
index 342ae5bdb8..79fd9461ec 100644
--- a/src/xenapi/xenapi_utils.c
+++ b/src/xenapi/xenapi_utils.c
@@ -272,12 +272,14 @@ returnErrorFromSession(xen_session *session)
 {
     int i;
     virBuffer buf = VIR_BUFFER_INITIALIZER;
-    for (i = 0; i < session->error_description_count - 1; i++) {
+    for (i = 0; i < session->error_description_count; i++) {
         if (!i)
             virBufferEscapeString(&buf, "%s", session->error_description[i]);
         else
             virBufferEscapeString(&buf, " : %s", session->error_description[i]);
     }
+    if (virBufferUse(&buf) < 1)
+        virBufferAdd(&buf, _("unknown error"), -1);
     return virBufferContentAndReset(&buf);
 }