fix: use short ControlPath to avoid Unix socket limit on macOS

The ControlMaster socket path ~/Library/Caches/scarf/ssh/%C can
exceed the 104-byte macOS Unix domain socket limit when the
username is long, causing ssh to silently exit 255 with
"unix_listener: path too long for Unix domain socket".

Switch to /tmp/scarf-ssh-<uid> which stays well within the limit.
This commit is contained in:
Alex Maksimchuk
2026-04-19 23:03:28 -05:00
parent ba8bf14ff0
commit 1293cfa23b
@@ -52,10 +52,13 @@ struct SSHTransport: ServerTransport {
/// per-host via OpenSSH's `%C` token). Exposed as a static so
/// cleanup paths (`ServerRegistry.removeServer`, app-launch sweep) can
/// compute it without instantiating a transport.
///
/// Uses a short path under /tmp to stay within the 104-byte macOS
/// Unix domain socket limit. The Caches path
/// (~/Library/Caches/scarf/ssh/%C) can exceed this limit when the
/// username is long, causing ssh to exit 255.
nonisolated static func controlDirPath() -> String {
let base = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first?.path
?? NSHomeDirectory() + "/Library/Caches"
return base + "/scarf/ssh"
return "/tmp/scarf-ssh-\(getuid())"
}
/// Snapshot cache directory for a given server. Stable per-ID so repeated