From 2f4558aa3df29d5cd1dfa72ff4278e1fe6fc1576 Mon Sep 17 00:00:00 2001
From: Jonas Maier <jonas@x77.dev>
Date: Mon, 9 Mar 2026 20:06:43 +0100
Subject: export functions :))

---
 src/export_fun.rs | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

(limited to 'src/export_fun.rs')

diff --git a/src/export_fun.rs b/src/export_fun.rs
index 64ac08b..9c2ab4a 100644
--- a/src/export_fun.rs
+++ b/src/export_fun.rs
@@ -1,14 +1,19 @@
 //! allow sub-programs to invoke arbitrary user-defined functions via a unix socket
 
 use crate::Session;
+use crate::run::Input;
+use crate::run::Output;
 use crate::run::get_command_kind;
 use std::env::current_exe;
 use std::ffi::OsStr;
 use std::fs;
+use std::fs::File;
 use std::io;
 use std::io::IoSliceMut;
 use std::io::Read;
 use std::io::Write;
+use std::os::fd::FromRawFd;
+use std::os::fd::OwnedFd;
 use std::os::unix::ffi::OsStrExt;
 use std::os::unix::fs::symlink;
 use std::os::unix::net::AncillaryData;
@@ -21,8 +26,9 @@ use std::process::exit;
 use std::sync::Arc;
 use std::sync::Mutex;
 use std::thread;
+use std::time::Duration;
 
-fn handle_server(session: Arc<Mutex<Session>>, stream: UnixStream) -> io::Result<()> {
+fn handle_server(session: Arc<Mutex<Session>>, mut stream: UnixStream) -> io::Result<()> {
     // TODO: figure out how to get a reasonable limit on CLI arg len
     let mut buf = [0u8; 8192];
     let mut iov = [IoSliceMut::new(&mut buf)];
@@ -64,18 +70,38 @@ fn handle_server(session: Arc<Mutex<Session>>, stream: UnixStream) -> io::Result
 
     let se = session.lock().unwrap();
     match get_command_kind(&se, cli_args[0].as_slice()) {
-        crate::run::CommandKind::Fun(ast) => todo!(),
+        crate::run::CommandKind::Fun(_) => (),
         crate::run::CommandKind::Path(_) | crate::run::CommandKind::Builtin(_) => {
             return Ok(());
         }
     }
+    drop(se);
 
-    todo!()
+    let stdin = File::from(unsafe { OwnedFd::from_raw_fd(fds[0]) });
+    let stdout = File::from(unsafe { OwnedFd::from_raw_fd(fds[1]) });
+
+    let res = crate::run::Executor::execute_fun(
+        session,
+        cli_args,
+        Input::File(stdin),
+        Output::File(stdout),
+    );
+
+    let exit_code = match res {
+        Ok(_) => 0,
+        Err(e) => match e {
+            crate::run::ExecError::UnknownVariable(_) => -3,
+            crate::run::ExecError::ExecError(x) => x,
+        },
+    };
+
+    let _ = stream.set_write_timeout(Some(Duration::from_secs(1)));
+    stream.write_all(&exit_code.to_le_bytes())?;
+
+    Ok(())
 }
 
 fn handle_client(mut stream: UnixStream) -> io::Result<()> {
-    println!("uhh hi");
-
     // give up all my file descriptors descriptors
     let mut ancillary_buffer = [0; 128];
     let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
-- 
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