log_listener CLI

The log_listener binary is included in all device builds that include pkgfs and is currently the primary tool used by engineers to interactively read a live log stream. In-tree developers usually invoke it with ffx log.

  Specify using the format <code>&lt;component-selector&gt;#&lt;log-level&gt;</code>, where
  <code>log-level</code> must be one of <code>FATAL|ERROR|WARN|INFO|DEBUG|TRACE</code>.
  <p>
  Multiple component selections are delimited by commas.