Fix review findings and Windows setup issues found in testing

- Run the server with -X utf8: the bundled Windows Python ignores PYTHON* variables.
- Quote every argument in Windows terminal commands, so cmd metacharacters are literal.
- frame_connect: accept HOST:PORT, validate input, retry the config swap while
  Windows' ssh.exe holds ~/.ssh/config locked, and don't apply 0o700 on Windows.
- Never use rsync on Windows; unbounded stream queue; validate FRAME_ALIAS;
  more Linux terminals; bundle the window icon; docs and wording fixes.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

README.md

@@ -93,7 +93,7 @@ already ships. [How each feature works](docs/frame-control.md).
 | | Download | Needs |
 |---|---|---|
 | **macOS** (Apple Silicon) | [Frame-Control-mac-arm64.dmg](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-mac-arm64.dmg) | Python 3 (`xcode-select --install`) |
-| **Windows** 10 / 11 (x64) | [Frame-Control-Setup-x64.exe](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-Setup-x64.exe) · [portable .zip](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-win-x64.zip) | Nothing extra: Python is bundled |
+| **Windows** 10 / 11 (x64) | [Frame-Control-Setup-x64.exe](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-Setup-x64.exe) · [portable .zip](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-win-x64.zip) | Nothing extra: Python is bundled, and SSH is built into Windows |
 | **Linux** (x64) | [AppImage](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-linux-x86_64.AppImage) · [.deb](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-linux-amd64.deb) | `python3` and `ssh` (most desktops have both) |
 | **Linux** (arm64) | [AppImage](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-linux-arm64.AppImage) · [.deb](https://github.com/saphid/steam-frame/releases/latest/download/Frame-Control-linux-arm64.deb) | same |
 

app/build/fetch-python.js

@@ -28,7 +28,8 @@ function get(url) {
 }
 
 (async () => {
-  if (fs.existsSync(path.join(OUT, "python.exe")) && fs.readFileSync(path.join(OUT, ".version"), "utf8") === VERSION) {
+  const stamp = path.join(OUT, ".version");
+  if (fs.existsSync(path.join(OUT, "python.exe")) && fs.existsSync(stamp) && fs.readFileSync(stamp, "utf8") === VERSION) {
     console.log(`Python ${VERSION} already in ${OUT}`);
     return;
   }

app/main.js

@@ -109,7 +109,7 @@ function ping(target) {
 
 async function startServer() {
   const env = { ...process.env, PATH: await loginPath(), PYTHONUNBUFFERED: "1", PYTHONDONTWRITEBYTECODE: "1",
-                PYTHONIOENCODING: "utf-8", PYTHONUTF8: "1", FRAME_CONTROL_APP: "1" };  // UTF-8 even on Windows
+                PYTHONIOENCODING: "utf-8", PYTHONUTF8: "1", FRAME_CONTROL_APP: "1" };
   python = await findPython(env);
   if (!python) throw new Error(`Frame Control needs Python 3.8 or later. ${PYTHON_HELP}`);
   if (!await hasSsh(env)) throw new Error(`Frame Control needs the ssh command. ${SSH_HELP}`);
@@ -118,7 +118,8 @@ async function startServer() {
   const log = fs.openSync(LOG, "a");
   fs.writeSync(log, `\n--- ${new Date().toISOString()} ${python} ${SERVER} --port ${port}\n`);
   // stdin stays open while the app runs; the server exits cleanly when it closes.
-  const child = spawn(python, [SERVER, "--port", String(port), "--exit-on-eof"],
+  // -X utf8: the bundled Windows Python ignores PYTHON* variables (isolated mode).
+  const child = spawn(python, ["-X", "utf8", SERVER, "--port", String(port), "--exit-on-eof"],
                       { env, stdio: ["pipe", log, log], windowsHide: true });
   child.stdin.on("error", () => {});
   fs.closeSync(log);

app/package.json

@@ -27,7 +27,8 @@
     },
     "files": [
       "main.js",
-      "package.json"
+      "package.json",
+      "build/icon.png"
     ],
     "extraResources": [
       {

docs/frame-control.md

@@ -8,11 +8,11 @@ As of 2026-09-25 no other desktop app manages the Frame end to end.
 the headset over SSH. [FrameDrop](https://framedropvr.com) sideloads but is
 Windows-only. Steam Link views the headset.
 
-You can also run the same UI in a browser without the app, from a checkout on
+You can also run the same UI in a browser without the app, from a checkout:
-macOS or Linux:
 
 ```sh
-./scripts/frame-ui.sh        # opens http://127.0.0.1:47810 in its own window
+./scripts/frame-ui.sh        # macOS: opens http://127.0.0.1:47810 in its own window
+python3 ui/server.py         # anywhere: then open http://127.0.0.1:47810
 ```
 
 ## Features

ui/frame_android.py

@@ -108,7 +108,8 @@ _install_lock = threading.Lock()  # installs are rare; one at a time avoids ever
 def _copy(src, dest, executable=False, timeout=600):
     """Copy a local file to the Frame: rsync where installed (not on Windows), else scp."""
     name = os.path.basename(src)
-    if shutil.which('rsync'):
+    rsync = None if frame_host.WINDOWS else shutil.which('rsync')  # see server.push_file
+    if rsync:
         cmd = ['rsync', '-a', *(['--chmod=u+x'] if executable else []),
                '-e', shlex.join(['ssh', *SSH_OPTS]), src, f'{FRAME}:{dest}']
     else:
@@ -119,7 +120,7 @@ def _copy(src, dest, executable=False, timeout=600):
         raise FrameError(f'copying {name} to the Frame timed out')
     except subprocess.CalledProcessError as e:
         raise FrameError(f'copying {name} to the Frame failed: {(e.stderr or "").strip()[-300:]}')
-    if executable and not shutil.which('rsync'):
+    if executable and not rsync:
         ssh(f'chmod u+x {shlex.quote(dest)}')
 
 

ui/frame_compat_db.py

@@ -40,8 +40,8 @@ def key():
         p = subprocess.run(['security', 'find-generic-password', '-s', KEYCHAIN[0], '-a', KEYCHAIN[1], '-w'],
                            capture_output=True, text=True)
     if p is None or p.returncode != 0 or not p.stdout.strip():
-        raise DBError('No compatibility-database key in the Keychain '
+        raise DBError('No compatibility-database key (set FRAME_CONTROL_KEY, or on macOS the Keychain '
-                      f'(service {KEYCHAIN[0]}, account {KEYCHAIN[1]})')
+                      f'item service {KEYCHAIN[0]}, account {KEYCHAIN[1]})')
     return p.stdout.strip()
 
 

ui/frame_connect.py

@@ -3,15 +3,17 @@ alias to ~/.ssh/config and copy the key over, asking for the Developer Mode
 password once. The Linux and Windows twin of scripts/connect.sh (which the Mac
 app uses); same config block, so either can re-run over the other. Idempotent.
 
-Usage: python3 ui/frame_connect.py [HOST_OR_IP]
+Usage: python3 ui/frame_connect.py [HOST_OR_IP[:PORT]]
 Env:   FRAME_USER (default steamos), FRAME_ALIAS (default frame)
 """
 import base64
 import os
 import platform
+import re
 import socket
 import subprocess
 import sys
+import time
 from pathlib import Path
 
 FRAME_USER = os.environ.get("FRAME_USER", "steamos")
@@ -36,26 +38,50 @@ def say(msg):
     print(msg, flush=True)
 
 
-def port_open(host):
+def split_port(arg):
+    """"host:2222" -> ("host", 2222); anything else (IPv6 too) keeps port 22."""
+    host, sep, port = arg.rpartition(":")
+    if sep and port.isdigit() and ":" not in host:
+        return host, int(port)
+    return arg, 22
+
+
+def port_open(host, port=22):
     try:
-        with socket.create_connection((host, 22), timeout=3):
+        with socket.create_connection((host, port), timeout=3):
             return True
     except OSError:
         return False
 
 
+HOST_RE = re.compile(r"[A-Za-z0-9][A-Za-z0-9.:%-]*")
+
+
 def pick_host(arg):
-    for host in [arg] if arg else [f"{FRAME_ALIAS}.local", FRAME_ALIAS]:
+    if arg and not HOST_RE.fullmatch(arg):
-        if port_open(host):
+        say(f"  - {arg!r} isn't a host name or IP address")
-            return host
+        return None
-        say(f"  - {host}: not resolvable or port 22 closed")
+    for cand in [arg] if arg else [f"{FRAME_ALIAS}.local", FRAME_ALIAS]:
+        host, port = split_port(cand)
+        if port_open(host, port):
+            return host, port
+        say(f"  - {cand}: not resolvable or port {port} closed")
     return None
 
 
-def write_config(host):
+def make_ssh_dir():
+    # Windows: no mode. Python 3.12.4+ turns 0o700 into an owner-only ACL, which locks
+    # the user out if the folder's owner is Administrators; the profile's ACL suffices.
+    if os.name == "nt":
+        SSH_DIR.mkdir(exist_ok=True)
+    else:
+        SSH_DIR.mkdir(mode=0o700, exist_ok=True)
+
+
+def write_config(host, port=22):
     """Replace our managed block and put it first: ssh uses the first value it sees per
     option. The trailing "Host *" returns the rest of the file to global scope."""
-    SSH_DIR.mkdir(mode=0o700, exist_ok=True)
+    make_ssh_dir()
     old = CONFIG.read_text(encoding="utf-8") if CONFIG.exists() else ""
     kept, skip = [], False
     for line in old.splitlines():
@@ -65,12 +91,27 @@ def write_config(host):
             skip = False
         elif not skip:
             kept.append(line)
-    block = [BEGIN, f"Host {FRAME_ALIAS}", f"  HostName {host}", f"  User {FRAME_USER}",
+    block = [BEGIN, f"Host {FRAME_ALIAS}", f"  HostName {host}", *([f"  Port {port}"] if port != 22 else []),
+             f"  User {FRAME_USER}",
              "  IdentityFile ~/.ssh/id_ed25519_frame", "  IdentitiesOnly yes",
              "  ServerAliveInterval 30", "Host *", END]
-    CONFIG.write_text("\n".join(block + kept) + "\n", encoding="utf-8")
+    tmp = CONFIG.with_name("config.frame-control.tmp")
+    tmp.write_text("\n".join(block + kept) + "\n", encoding="utf-8")
     if os.name != "nt":
-        CONFIG.chmod(0o600)
+        tmp.chmod(0o600)
+    # On Windows a running ssh.exe (Frame Control's own, say) keeps the config open
+    # and locked, so the swap can fail for a moment; keep trying for a while.
+    for attempt in range(60):
+        try:
+            os.replace(tmp, CONFIG)
+            return
+        except PermissionError:
+            if attempt == 0:
+                say("    ~/.ssh/config is in use by another ssh; waiting for it...")
+            time.sleep(0.5)
+    tmp.unlink(missing_ok=True)
+    raise SystemExit("~/.ssh/config stayed locked by another program. Quit Frame Control "
+                     "and any ssh windows, then run the setup again.")
 
 
 def key_login_works():
@@ -82,8 +123,8 @@ def main(argv):
     if argv and argv[0] in ("-h", "--help"):
         sys.exit(__doc__)
     say("==> Looking for the Steam Frame")
-    host = pick_host(argv[0] if argv else None)
+    found = pick_host(argv[0] if argv else None)
-    while not host:
+    while not found:
         say("Could not reach the Frame on port 22.")
         say("Check: Developer Mode on and a user password set; same network; no client isolation.")
         try:
@@ -92,11 +133,12 @@ def main(argv):
             typed = ""
         if not typed:
             return 1
-        host = pick_host(typed)
+        found = pick_host(typed)
-    say(f"    found: {host}")
+    host, port = found
+    say(f"    found: {host}" + (f" port {port}" if port != 22 else ""))
 
     say("==> SSH key")
-    SSH_DIR.mkdir(mode=0o700, exist_ok=True)
+    make_ssh_dir()
     if KEY.exists():
         say(f"    exists: {KEY}")
     else:
@@ -105,7 +147,7 @@ def main(argv):
         say(f"    created {KEY}")
 
     say(f"==> ~/.ssh/config alias '{FRAME_ALIAS}' -> {host}")
-    write_config(host)
+    write_config(host, port)
 
     say("==> Checking key login")
     if key_login_works():
@@ -114,7 +156,7 @@ def main(argv):
         say("    copying the key: enter the Developer Mode password when asked")
         pub = KEY.with_suffix(".pub").read_text(encoding="utf-8").strip()
         r = subprocess.run(["ssh", "-o", "StrictHostKeyChecking=accept-new", "-o", "PubkeyAuthentication=no",
-                            f"{FRAME_USER}@{host}", ADD_KEY_CMD], input=pub + "\n", text=True)
+                            "-p", str(port), f"{FRAME_USER}@{host}", ADD_KEY_CMD], input=pub + "\n", text=True)
         if r.returncode != 0 or not key_login_works():
             say("Key login still isn't working. Check the password and run this again.")
             return 1

ui/frame_host.py

@@ -146,16 +146,18 @@ def open_terminal(argv, title="Frame Control"):
         # `start` gives the command its own console window; cmd /k keeps it open.
         # One hand-built command line: quoting it twice through list2cmdline would
         # produce backslash-escaped quotes, which cmd doesn't understand.
-        inner = subprocess.list2cmdline(argv)
+        # Every argument is quoted, so cmd treats & | < > ^ in them literally.
+        inner = " ".join('"%s"' % a.replace('"', '\\"') for a in argv)
         subprocess.Popen(f'cmd.exe /c start "{title}" cmd.exe /k "{inner}"', **DETACHED)
         return "a terminal window"
     script = f'{shlex.join(argv)}; echo; read -r -p "Press Enter to close. " _'
-    for name, flag in (("x-terminal-emulator", "-e"), ("gnome-terminal", "--"), ("konsole", "-e"),
+    for name, flags in (("x-terminal-emulator", ["-e"]), ("gnome-terminal", ["--"]), ("ptyxis", ["--"]),
-                       ("xfce4-terminal", "-x"), ("kitty", None), ("alacritty", "-e"),
+                        ("kgx", ["--"]), ("konsole", ["-e"]), ("xfce4-terminal", ["-x"]),
-                       ("foot", None), ("xterm", "-e")):
+                        ("tilix", ["-e"]), ("lxterminal", ["-e"]), ("kitty", []), ("alacritty", ["-e"]),
+                        ("wezterm", ["start", "--"]), ("foot", []), ("xterm", ["-e"])):
         exe = which(name)
         if exe:
-            _spawn([exe, *([flag] if flag else []), "bash", "-c", script])
+            _spawn([exe, *flags, "bash", "-c", script])
             return name
     raise HostError("No terminal program found (tried gnome-terminal, konsole, xterm and others)")
 

ui/index.html

@@ -1100,7 +1100,7 @@ function upload(file, mode) {
 }
 async function sendFiles(files) {
   for (const f of files) {
-    if (!f.size) { toast(`${f.name}: folders and empty files aren't supported here; use scripts/push.sh`, true); continue; }
+    if (!f.size) { toast(`${f.name}: folders and empty files aren't supported here; zip the folder first`, true); continue; }
     const apk = f.name.toLowerCase().endsWith(".apk");
     await act(apk ? `Install ${f.name}` : `Copy ${f.name} to ~/Downloads`, () => upload(f, apk ? "apk" : "push"));
   }

ui/server.py

@@ -39,6 +39,8 @@ import frame_store  # noqa: E402
 
 HERE = Path(__file__).resolve().parent
 FRAME = os.environ.get("FRAME_ALIAS", "frame")
+if not re.fullmatch(r"[A-Za-z0-9][A-Za-z0-9._-]*", FRAME):
+    sys.exit(f"FRAME_ALIAS must be a plain host alias, not {FRAME!r}")
 # Reuse one SSH connection for the frequent status/screenshot calls, where ssh
 # supports it (not on Windows: there every command connects on its own).
 CONTROL = frame_host.control_path()
@@ -763,7 +765,7 @@ POST = {"/api/android/display": android_display, "/api/android": android,"/api/l
 
 def _pipe_reader(pipe):
     """Chunks from a pipe via a thread; select() can't wait on pipes on Windows."""
-    chunks = queue.Queue(maxsize=64)
+    chunks = queue.Queue()  # unbounded: the pump never blocks, so it ends at EOF
 
     def pump():
         try:
@@ -791,7 +793,8 @@ def push_file(path, dest="Downloads/"):
     """Copy a file to the Frame (as scripts/push.sh): rsync where both ends have it, else scp."""
     name = Path(path).name
     try:
-        if shutil.which("rsync") and ssh("command -v rsync >/dev/null && echo yes || true").strip() == "yes":
+        # Not on Windows: a Windows rsync (cwRsync, MSYS2) wouldn't take our POSIX -e quoting.
+        if not frame_host.WINDOWS and shutil.which("rsync") and ssh("command -v rsync >/dev/null && echo yes || true").strip() == "yes":
             cmd = ["rsync", "-a", "-e", shlex.join(SSH), str(path), f"{FRAME}:{shlex.quote(dest)}"]
         else:
             # Modern scp uses SFTP, so the remote path isn't parsed by a shell.