From: Jan Kundrát <jan.kundrat@cesnet.cz>
Date: Thu, 20 Feb 2014 01:13:20 +0000 (+0100)
Subject: lvm: Do not segfault when there are no VGs
X-Git-Tag: collectd-5.4.2~31
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=25d7de9;p=collectd.git

lvm: Do not segfault when there are no VGs
---

diff --git a/src/lvm.c b/src/lvm.c
index 6ef3a7b2..12c621d0 100644
--- a/src/lvm.c
+++ b/src/lvm.c
@@ -53,6 +53,11 @@ static int vg_read(vg_t vg, char const *vg_name)
     lvm_submit (vg_name, "free", lvm_vg_get_free_size(vg));
 
     lvs = lvm_vg_list_lvs(vg);
+    if (!lvs) {
+        /* no VGs are defined, which is not an error per se */
+        return (0);
+    }
+
     dm_list_iterate_items(lvl, lvs) {
          lvm_submit(vg_name, lvm_lv_get_name(lvl->lv), lvm_lv_get_size(lvl->lv));
     }