src/common.[ch]: Implement "parse_identifier_vl".

[collectd.git] / src / collectd-exec.pod

diff --git a/src/collectd-exec.pod b/src/collectd-exec.pod
index b95779d..10f6829 100644 (file)
--- a/src/collectd-exec.pod
+++ b/src/collectd-exec.pod
@@ -230,6 +230,23 @@ associated with a certain value.
 
 =back
 
+=head1 ENVIRONMENT
+
+The following environment variables are set by the plugin before calling
+I<exec>:
+
+=over 4
+
+=item COLLECTD_INTERVAL
+
+Value of the global interval setting.
+
+=item COLLECTD_HOSTNAME
+
+Hostname used by I<collectd> to dispatch local values.
+
+=back
+
 =head1 USING NAGIOS PLUGINS
 
 Though the interface is far from perfect, there are tons of plugins for Nagios.
@@ -256,6 +273,14 @@ to make use of collectd's more powerful interface.
 The user, the binary is executed as, may not have root privileges, i.E<nbsp>e.
 must have an UID that is non-zero. This is for your own good.
 
+=item
+
+Early versions of the plugin did not use a command but treated all lines as if
+they were arguments to the I<PUTVAL> command. When the I<PUTNOTIF> command was
+implemented, this behavior was kept for lines which start with an unknown
+command for backwards compatibility. This compatibility code has been removed
+in I<collectdE<nbsp>5>.
+
 =back
 
 =head1 SEE ALSO