Cross-platform IPC via interprocess + Windows support fixes

- Replace Unix-socket-only server/client with interprocess local sockets:
  unchanged unix domain socket on Linux (SOCKET_API compatible),
  named pipes on Windows
- Run command lines with arguments via sh -c / cmd /C in the PTY
- Wire RunProgram args into the spawned command
- Make libc a unix-only dependency
- Skip Kitty background image on Windows (protocol unsupported)
- Drop dead pixel-size query code in kitty_gfx
- Reject left/right panel positions at config parse instead of silently
  ignoring them

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Cargo.lock

@@ -331,6 +331,12 @@ dependencies = [
  "crypto-common",
 ]
 
+[[package]]
+name = "doctest-file"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2db04e74f0a9a93103b50e90b96024c9b2bdca8bce6a632ec71b88736d3d359"
+
 [[package]]
 name = "document-features"
 version = "0.2.12"
@@ -614,6 +620,19 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "interprocess"
+version = "2.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "069323743400cb7ab06a8fe5c1ed911d36b6919ec531661d034c89083629595b"
+dependencies = [
+ "doctest-file",
+ "libc",
+ "recvmsg",
+ "widestring",
+ "windows-sys",
+]
+
 [[package]]
 name = "itertools"
 version = "0.14.0"
@@ -1225,6 +1244,12 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "recvmsg"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3edd4d5d42c92f0a659926464d4cce56b562761267ecf0f469d85b7de384175"
+
 [[package]]
 name = "redox_syscall"
 version = "0.5.18"
@@ -1694,6 +1719,7 @@ dependencies = [
  "anyhow",
  "crossterm",
  "image",
+ "interprocess",
  "libc",
  "portable-pty",
  "ratatui",
@@ -1937,6 +1963,12 @@ dependencies = [
  "wezterm-dynamic",
 ]
 
+[[package]]
+name = "widestring"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72069c3113ab32ab29e5584db3c6ec55d416895e60715417b5b883a357c3e471"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"

Cargo.toml

@@ -18,4 +18,7 @@ portable-pty = "0.9"
 vt100 = "0.16"
 anyhow = "1"
 image = { version = "0.25", default-features = false, features = ["jpeg", "png", "gif", "bmp", "webp"] }
+interprocess = "2.4"
+
+[target.'cfg(unix)'.dependencies]
 libc = "0.2"

src/app.rs

@@ -477,7 +477,6 @@ impl App {
                     bottom_used += 1;
                     Rect::new(area.x, area.y + area.height.saturating_sub(bottom_used), area.width, 1)
                 }
-                PanelPosition::Left | PanelPosition::Right => Rect::default(),
             };
 
             let mut item_rects = Vec::new();
@@ -1257,7 +1256,14 @@ impl App {
                 self.spawn_terminal(&shell);
             }
             MenuAction::RunScript { path } => { self.spawn_terminal(&path); }
-            MenuAction::RunProgram { command, .. } => { self.spawn_terminal(&command); }
+            MenuAction::RunProgram { command, args } => {
+                let cmdline = if args.is_empty() {
+                    command
+                } else {
+                    format!("{} {}", command, args.join(" "))
+                };
+                self.spawn_terminal(&cmdline);
+            }
             MenuAction::SpawnRunDialog => self.spawn_run_dialog(),
             MenuAction::Submenu { .. } => {}
             MenuAction::NoOp => {}

src/client.rs

@@ -4,22 +4,24 @@ use crossterm::{
     execute,
     terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
 };
+use interprocess::local_socket::traits::Stream as _;
+use interprocess::local_socket::Stream;
 use std::io::{self, BufReader, BufWriter, Write};
-use std::os::unix::net::UnixStream;
 use std::sync::mpsc;
 use std::time::Duration;
 
 pub fn run(socket_path: &str) -> io::Result<()> {
-    let stream = UnixStream::connect(socket_path).map_err(|e| {
+    let name = ipc::socket_name(socket_path)?;
+    let stream = Stream::connect(name).map_err(|e| {
         io::Error::new(
             io::ErrorKind::ConnectionRefused,
             format!("Kunde inte ansluta till TUI-WM ({}): {}", socket_path, e),
         )
     })?;
 
-    let stream_write = stream.try_clone()?;
-    let mut reader = BufReader::new(stream);
-    let mut writer = BufWriter::new(stream_write);
+    let (recv_half, send_half) = stream.split();
+    let mut reader = BufReader::new(recv_half);
+    let mut writer = BufWriter::new(send_half);
 
     let (term_w, term_h) = crossterm::terminal::size()?;
 

src/config.rs

@@ -59,8 +59,6 @@ pub struct PanelConfig {
 pub enum PanelPosition {
     Top,
     Bottom,
-    Left,
-    Right,
 }
 
 #[derive(Deserialize, Debug, Clone)]

src/ipc.rs

@@ -6,6 +6,7 @@ pub const SOCKET_ENV: &str = "TUI_WM_SOCKET";
 pub const WINDOW_ID_ENV: &str = "TUI_WM_WINDOW_ID";
 pub const VERSION: &str = "0.1.0";
 
+#[cfg(unix)]
 pub fn default_socket_path() -> String {
     if let Ok(runtime) = std::env::var("XDG_RUNTIME_DIR") {
         format!("{}/tui-wm.sock", runtime)
@@ -16,6 +17,31 @@ pub fn default_socket_path() -> String {
     }
 }
 
+#[cfg(windows)]
+pub fn default_socket_path() -> String {
+    // Namespaced namn → named pipe (\\.\pipe\tui-wm-<user>)
+    match std::env::var("USERNAME") {
+        Ok(user) => format!("tui-wm-{}", user),
+        Err(_) => "tui-wm".to_string(),
+    }
+}
+
+/// Konverterar en socket-sträng till ett interprocess-namn.
+/// Unix: filsystemssökväg (vanlig unix-socket — kompatibel med externa
+/// klienter i t.ex. Python/Bash enligt SOCKET_API.md).
+/// Windows: namespaced namn (named pipe).
+#[cfg(unix)]
+pub fn socket_name(path: &str) -> std::io::Result<interprocess::local_socket::Name<'_>> {
+    use interprocess::local_socket::{GenericFilePath, ToFsName};
+    path.to_fs_name::<GenericFilePath>()
+}
+
+#[cfg(windows)]
+pub fn socket_name(path: &str) -> std::io::Result<interprocess::local_socket::Name<'_>> {
+    use interprocess::local_socket::{GenericNamespaced, ToNsName};
+    path.to_ns_name::<GenericNamespaced>()
+}
+
 #[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(tag = "type", rename_all = "snake_case")]
 pub enum ClientMessage {

src/kitty_gfx.rs

@@ -135,28 +135,6 @@ pub fn show_bg(
     })
 }
 
-/// Fråga terminalen om pixelstorlek via `\x1b[14t`.
-/// Skickar frågan — svaret (`\x1b[4;<h>;<w>t`) läses av crossterm.
-#[allow(dead_code)]
-pub fn query_pixel_size(stdout: &mut impl Write) {
-    let _ = stdout.write_all(b"\x1b[14t");
-    let _ = stdout.flush();
-}
-
-/// Försök tolka ett `\x1b[4;<h>;<w>t`-svar från stdin.
-/// Returnerar `(width, height)` i pixlar.
-#[allow(dead_code)]
-pub fn parse_pixel_size_response(data: &[u8]) -> Option<(u16, u16)> {
-    // Format: ESC [ 4 ; <height> ; <width> t
-    let s = std::str::from_utf8(data).ok()?;
-    let s = s.strip_prefix("\x1b[4;")?;
-    let s = s.strip_suffix('t')?;
-    let mut parts = s.split(';');
-    let h: u16 = parts.next()?.parse().ok()?;
-    let w: u16 = parts.next()?.parse().ok()?;
-    Some((w, h))
-}
-
 /// Enkel base64-kodning.
 fn base64_encode(data: &[u8]) -> String {
     const ALPHABET: &[u8; 64] =

src/main.rs

@@ -238,6 +238,11 @@ fn update_background(
     cols: u16,
     rows: u16,
 ) {
+    // Kitty graphics-protokollet stöds inte av Windows Terminal/conhost —
+    // att skriva APC-sekvenser dit ger bara skräptecken.
+    if cfg!(windows) {
+        return;
+    }
     let wanted_path = app.config.background_image.as_deref();
 
     // Kolla om vi behöver göra något

src/pty.rs

@@ -4,6 +4,30 @@ use std::io::Read;
 use std::sync::mpsc;
 use std::thread;
 
+/// Bygger kommandot för PTY:n. En enkel programsökväg körs direkt;
+/// en kommandorad med argument (t.ex. "htop -d 10") körs via shell
+/// så att argument, pipes och citattecken fungerar.
+fn build_command(shell: &str) -> CommandBuilder {
+    if shell.trim().contains(char::is_whitespace) {
+        #[cfg(unix)]
+        {
+            let mut c = CommandBuilder::new("/bin/sh");
+            c.arg("-c");
+            c.arg(shell);
+            c
+        }
+        #[cfg(windows)]
+        {
+            let mut c = CommandBuilder::new("cmd.exe");
+            c.arg("/C");
+            c.arg(shell);
+            c
+        }
+    } else {
+        CommandBuilder::new(shell)
+    }
+}
+
 pub struct PtyTerminal {
     pub master: Box<dyn portable_pty::MasterPty + Send>,
     pub writer: Box<dyn std::io::Write + Send>,
@@ -20,7 +44,7 @@ impl PtyTerminal {
             pixel_height: 0,
         })?;
 
-        let mut cmd = CommandBuilder::new(shell);
+        let mut cmd = build_command(shell);
         cmd.env("TERM", "xterm-256color");
         cmd.env("COLORTERM", "truecolor");
         for (key, val) in extra_env {

src/server.rs

@@ -1,6 +1,7 @@
 use crate::ipc::{self, ClientMessage, ClientRole, ServerMessage};
+use interprocess::local_socket::traits::{ListenerExt as _, Stream as _};
+use interprocess::local_socket::{ListenerOptions, Stream};
 use std::io::{BufReader, BufWriter};
-use std::os::unix::net::{UnixListener, UnixStream};
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::mpsc;
 use std::thread;
@@ -25,11 +26,21 @@ pub enum IpcEvent {
 }
 
 pub fn start(socket_path: &str, event_tx: mpsc::Sender<IpcEvent>) {
+    // På unix: städa bort en ev. kvarlämnad socket-fil från en tidigare körning.
+    #[cfg(unix)]
     let _ = std::fs::remove_file(socket_path);
-    let listener = match UnixListener::bind(socket_path) {
+
+    let name = match ipc::socket_name(socket_path) {
+        Ok(n) => n,
+        Err(e) => {
+            eprintln!("Ogiltigt socket-namn {}: {}", socket_path, e);
+            return;
+        }
+    };
+    let listener = match ListenerOptions::new().name(name).create_sync() {
         Ok(l) => l,
         Err(e) => {
-            eprintln!("Kunde inte binda Unix socket {}: {}", socket_path, e);
+            eprintln!("Kunde inte binda lokal socket {}: {}", socket_path, e);
             return;
         }
     };
@@ -45,7 +56,8 @@ pub fn start(socket_path: &str, event_tx: mpsc::Sender<IpcEvent>) {
                         handle_client(client_id, stream, event_tx, sp);
                     });
                 }
-                Err(_) => break,
+                // Transienta accept-fel (kan hända för named pipes) — fortsätt lyssna.
+                Err(_) => continue,
             }
         }
     });
@@ -53,20 +65,17 @@ pub fn start(socket_path: &str, event_tx: mpsc::Sender<IpcEvent>) {
 
 fn handle_client(
     client_id: usize,
-    stream: UnixStream,
+    stream: Stream,
     event_tx: mpsc::Sender<IpcEvent>,
     socket_path: String,
 ) {
-    let stream_write = match stream.try_clone() {
-        Ok(s) => s,
-        Err(_) => return,
-    };
-    let mut reader = BufReader::new(stream);
+    let (recv_half, send_half) = stream.split();
+    let mut reader = BufReader::new(recv_half);
     let (tx, rx) = mpsc::sync_channel::<ServerMessage>(64);
 
     // Writer thread
     thread::spawn(move || {
-        let mut writer = BufWriter::new(stream_write);
+        let mut writer = BufWriter::new(send_half);
         for msg in rx {
             if ipc::write_message(&mut writer, &msg).is_err() {
                 break;