- Don't run jail-measure if no jails are running.

2 files changed, 4 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 326b718..cc4a17c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,7 @@
  - Add support for monitoring CPU time of a jail.
  - Number of threads in jail exposed via SNMP.
  - Tracking of combined RSS memory of jail.
+ - Don't run jail-measure if no jails are running.
 
 0.4
  - Fix problems with capturing IPv6 packets.
diff --git a/module/bsnmp-jails.c b/module/bsnmp-jails.c
index 542d30c..075ee50 100644
--- a/module/bsnmp-jails.c
+++ b/module/bsnmp-jails.c
@@ -721,6 +721,9 @@ measure_get_command (void)
 	char **args;
 	int i;
 
+	if (!jaildat_count)
+		return NULL;
+
 	args = calloc (jaildat_count + 4, sizeof (char*));
 	if (!args) {
 		emsg ("out of memory");