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Wait on the plugin child to prevent zombies (#901)

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JT 2022-01-31 10:20:11 -05:00 committed by GitHub
parent b1aa8f4edf
commit 96fedb47ee
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 17 additions and 18 deletions
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23
crates/nu-plugin/src/plugin/declaration.rs
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@ -92,28 +92,26 @@ impl Command for PluginDeclaration {
let reader = stdout_reader;
let mut buf_read = BufReader::with_capacity(OUTPUT_BUFFER_SIZE, reader);
let response = self
.encoding
.decode_response(&mut buf_read)
.map_err(|err| {
let response = self.encoding.decode_response(&mut buf_read).map_err(|err| {
let decl = engine_state.get_decl(call.decl_id);
ShellError::SpannedLabeledError(
format!("Unable to decode call for {}", decl.name()),
err.to_string(),
call.head,
)
})?;
});
match response {
PluginResponse::Value(value) => {
Ok(PluginResponse::Value(value)) => {
Ok(PipelineData::Value(value.as_ref().clone(), None))
}
PluginResponse::Error(err) => Err(err.into()),
PluginResponse::Signature(..) => Err(ShellError::SpannedLabeledError(
Ok(PluginResponse::Error(err)) => Err(err.into()),
Ok(PluginResponse::Signature(..)) => Err(ShellError::SpannedLabeledError(
"Plugin missing value".into(),
"Received a signature from plugin instead of value".into(),
call.head,
)),
Err(err) => Err(err),
}
} else {
Err(ShellError::SpannedLabeledError(
@ -121,11 +119,12 @@ impl Command for PluginDeclaration {
"no stdout reader".into(),
call.head,
))
}?;
};
// There is no need to wait for the child process to finish
// The response has been collected from the plugin call
Ok(pipeline_data)
// We need to call .wait() on the child, or we'll risk summoning the zombie horde
let _ = child.wait();
pipeline_data
}
fn is_plugin(&self) -> Option<(&PathBuf, &str, &Option<PathBuf>)> {