email plugin: Ignore size if it less than or equal to zero.

Some daemons (e.g. postgrey) don't provide any size information.

Signed-off-by: Sebastian Harl <sh@tokkee.org>

diff --git a/src/collectd.pod b/src/collectd.pod
index bf76055..8ee77ea 100644 (file)
--- a/src/collectd.pod
+++ b/src/collectd.pod
@@ -202,6 +202,8 @@ E-Mail type (e.g. "ham", "spam", "virus", ...) and size (bytes):
 
   e:<type>:<size>
 
+If C<size> is less than or equal to zero, C<size> is ignored.
+
 Spam score:
 
   s:<value>

diff --git a/src/email.c b/src/email.c
index 64b82e4..509eb23 100644 (file)
--- a/src/email.c
+++ b/src/email.c
@@ -486,9 +486,11 @@ static void *collect (void *arg)
                                type_list_incr (&count, type, 1);
                                pthread_mutex_unlock (&count_mutex);
 
-                               pthread_mutex_lock (&size_mutex);
-                               type_list_incr (&size, type, bytes);
-                               pthread_mutex_unlock (&size_mutex);
+                               if (bytes > 0) {
+                                       pthread_mutex_lock (&size_mutex);
+                                       type_list_incr (&size, type, bytes);
+                                       pthread_mutex_unlock (&size_mutex);
+                               }
                        }
                        else if ('s' == line[0]) { /* s:<value> */
                                pthread_mutex_lock (&score_mutex);