null builtin

2 files changed, 18 insertions, 2 deletions

diff --git a/src/run/builtin.rs b/src/run/builtin.rs
index c3153d6..4f7b9ed 100644
--- a/src/run/builtin.rs
+++ b/src/run/builtin.rs
@@ -352,3 +352,20 @@ impl Builtin for parse {
         Ok(())
     }
 }
+
+pub struct null;
+impl Builtin for null {
+    fn name(&self) -> &str {
+        "null"
+    }
+
+    fn io(
+        &self,
+        _session: Arc<Mutex<Session>>,
+        _args: &[BString],
+        _stdin: &mut dyn Read,
+        _stdout: &mut dyn Write,
+    ) -> Result {
+        Ok(())
+    }
+}
diff --git a/src/run/mod.rs b/src/run/mod.rs
index d386590..8c36f91 100644
--- a/src/run/mod.rs
+++ b/src/run/mod.rs
@@ -155,7 +155,6 @@ impl Executor {
                 Ok(Err(e)) => match e {
                     BuiltinError::IO(_) => code = -1,
                     BuiltinError::Exit(c) => code = c,
-                    BuiltinError::ParseError(_) => code = -2,
                 },
                 Err(_) => code = 127,
             }
@@ -291,7 +290,6 @@ pub fn run(se: Arc<Mutex<Session>>, cmd: Vec<u8>) {
 #[derive(Debug)]
 pub enum BuiltinError {
     IO(std::io::Error),
-    ParseError(&'static str),
     Exit(i32),
 }
 
@@ -332,6 +330,7 @@ const BUILTINS: &[&'static dyn Builtin] = &[
     &builtin::history,
     &builtin::escape,
     &builtin::parse,
+    &builtin::null,
 ];
 
 pub fn builtin_map() -> HashMap<BString, &'static dyn Builtin> {