Re: [Libguestfs] [PATCH nbdkit] docs: Suggest how to detect if a filter is installed.

On Sat, Sep 21, 2019 at 03:53:45PM +0100, Richard W.M. Jones wrote: >Thanks: Eric Blake, Martin Kletzander. >--- >docs/nbdkit-probing.pod | 11 +++++++++++ >1 file changed, 11 insertions(+) > >diff --git a/docs/nbdkit-probing.pod b/docs/nbdkit-probing.pod >index 94bdfb4..46a7c47 100644 >--- a/docs/nbdkit-probing.pod >+++ b/docs/nbdkit-probing.pod >@@ -80,6 +80,17 @@ installed. A complete shell script which does this is: > fi > done > >+=head2 Detect if a filter is installed >+ >+To find out if a filter is installed (and working) use >+I<--dump-plugin> with the C<null> plugin and the name of the filter to >+test: >+ >+ nbdkit --dump-plugin --filter=foo null >+ >+This will fail with an error and non-zero exit code if the C<foo> >+filter cannot be loaded. >+ Looks good, for people like me it would be also nice to mention that the above command will list the filter's parameters as well.