From: Florian Forster <octo@huhu.verplant.org>
Date: Sat, 19 Mar 2011 14:43:41 +0000 (+0100)
Subject: libvirt plugin: Correctly check the status code of virDomainGetVcpus().
X-Git-Tag: collectd-4.9.5~1
X-Git-Url: https://git.octo.it/?p=collectd.git;a=commitdiff_plain;h=15a21f242308218de9f171123ab7023dd20a1df6

libvirt plugin: Correctly check the status code of virDomainGetVcpus().

The status code is less than zero on failure and the number of vCPUs
otherwise. Thanks to "JLPC" for pointing this problem out.
---

diff --git a/src/libvirt.c b/src/libvirt.c
index bcbf0e6a..91fda7a5 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -295,21 +295,31 @@ lv_read (void)
     for (i = 0; i < nr_domains; ++i) {
         virDomainInfo info;
         virVcpuInfoPtr vinfo = NULL;
+        int status;
         int j;
 
-        if (virDomainGetInfo (domains[i], &info) != 0)
+        status = virDomainGetInfo (domains[i], &info);
+        if (status != 0)
+        {
+            ERROR ("libvirt plugin: virDomainGetInfo failed with status %i.",
+                    status);
             continue;
+        }
 
         cpu_submit (info.cpuTime, t, domains[i], "virt_cpu_total");
 
-        vinfo = malloc (info.nrVirtCpu * sizeof vinfo[0]);
+        vinfo = malloc (info.nrVirtCpu * sizeof (vinfo[0]));
         if (vinfo == NULL) {
             ERROR ("libvirt plugin: malloc failed.");
             continue;
         }
 
-        if (virDomainGetVcpus (domains[i], vinfo, info.nrVirtCpu,
-                    NULL, 0) != 0) {
+        status = virDomainGetVcpus (domains[i], vinfo, info.nrVirtCpu,
+                /* cpu map = */ NULL, /* cpu map length = */ 0);
+        if (status < 0)
+        {
+            ERROR ("libvirt plugin: virDomainGetVcpus failed with status %i.",
+                    status);
             free (vinfo);
             continue;
         }