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Fix some things I noticed while reviewing v1, and follow Rich's idea to add a new nbdkit_set_error() utility function with a binding for Python users to request a particular error (rather than being forced to live with whatever stale value is in errno after all the intermediate binding glue code). I could not easily find out how to register a C function callable from perl bindings, and have

...plugins/python/nbdkit-python-plugin.pod | 27 +++++++++++++++++++++++---- plugins/python/python.c | 18 ++++++++++++++++++ 2 files changed, 41 insertions(+), 4 deletions(-) diff --git a/plugins/python/nbdkit-python-plugin.pod b/plugins/python/nbdkit-python-plugin.pod index 9b0f0ef..8b3d08c 100644 --- a/plugins/python/nbdkit-python-plugin.pod +++ b/plugins/python/nbdkit-python-plugin.pod @@ -63,9 +63,22 @@ does not need to be executable. In fact it's a good idea not to do that, because running the plugin directly as a Python script won't work. +=head2 METHODS + +Your scrip...

...(h, count, offset, may_trim): + global disk + if may_trim: + disk[offset:offset+count] = bytearray(count) + else: + nbdkit.set_error(errno.EOPNOTSUPP) + raise Exception diff --git a/plugins/python/nbdkit-python-plugin.pod b/plugins/python/nbdkit-python-plugin.pod index 8b3d08c..b78c0e2 100644 --- a/plugins/python/nbdkit-python-plugin.pod +++ b/plugins/python/nbdkit-python-plugin.pod @@ -215,6 +215,26 @@ The body of your C<trim> function should "punch a hole" in the backing store. If the trim fails, your function should throw an exception, optionally us...