Checkmk Werk 13355: OpenWRT agent: Make <tt>df</tt> section work with BusyBox

ID: 13355 Title: OpenWRT agent: Make <tt>df</tt> section work with BusyBox Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0i1 BusyBox does not support <tt>-x</tt> and <tt>-l</tt> as arguments to the <tt>df</tt> command. These arguments are removed from the OpenWRT agent, s.t. the <tt>df</tt> section is now available in combination with BusyBox. Furthermore, <tt>-i</tt> is sometimes unsupported as well, so the agent will now first check if this argument is supported and only attempt to collect inodes information if it is. Note that in order to avoid hanging agents due to remote filesystems, the <tt>df</tt> calls are terminated after a fixed timeout of 5 s. This means that the agent will only attempt to produce the <tt>df</tt> section if the <tt>waitmax</tt> command is available. Checkmk provides a <tt>waitmax</tt> binary or alternatively, you can install the <tt>timeout</tt> command.