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Johnathan Corgan
db5b6b10bd
Daemon and client tools previously evaluated the same three locations (`/run/fips`, `XDG_RUNTIME_DIR`, `/tmp`) in different orders, allowing fipsctl/fipstop to connect to a socket the daemon never bound when neither side set `node.control.socket_path` explicitly. Collapse the three call sites (`default_control_path`, `default_gateway_path`, `ControlConfig::default_socket_path`) into a shared `resolve_default_socket` helper. Canonical order is `/run/fips` -> `$XDG_RUNTIME_DIR/fips/` -> `/tmp/fips-<name>`. Two hardening fixes folded in: writability is probed via tempfile create rather than mode bits (ACL- and group-aware), and `XDG_RUNTIME_DIR` is validated as an existing directory before being used (avoids stale post-logout values). The deployed fleet is unaffected -- packaged configs set `node.control.socket_path` explicitly. The fix surfaces for dev runs and the binary-install getting-started path.