[Xen-devel] [PATCH] xl: skip zero-size config data in list_domains_details

[Wei Liu <wei.liu2@xxxxxxxxxx>]

libxl_userdata_retrieve returns 0 when there's no stored config file for
a domain, so we cannot rely on that to continue processing.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 tools/libxl/xl_cmdimpl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index a8261be..542a971 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -3062,7 +3062,7 @@ static void list_domains_details(const libxl_dominfo 
*info, int nb_domain)
         if (info[i].domid == 0)
             continue;
         rc = libxl_userdata_retrieve(ctx, info[i].domid, "xl", &data, &len);
-        if (rc)
+        if (rc || len == 0)
             continue;
         CHK_ERRNO(asprintf(&config_source, "<domid %d data>", info[i].domid));
         libxl_domain_config_init(&d_config);
-- 
1.7.10.4


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