Round 15 audit cleanup. Three production paths were discarding
process / filesystem errors via bare 'let _ = ...'. Each silently
swallowed the error and the caller had no way to know the cleanup
failed — leading to zombie children (greeter), stale active-profile
symlinks (netctl), or unreaped USB device drivers (hotplugd).
1. local/recipes/system/redbear-greeter/source/src/main.rs — the
kill_child() helper now logs on kill() and wait() failure (with
debug-level success log) instead of 'let _ = process.kill();
let _ = process.wait();'. A failing kill() now produces an
eprintln so the operator sees it; wait() outcome is logged
at debug level.
2. local/recipes/system/redbear-netctl/source/src/main.rs — both
'let _ = fs::remove_file(active_profile_path());' sites (line 201
in stop_profile and line 224 in disable_profile) now log on
failure via eprintln. A failed remove_file previously left a
dangling 'active' symlink that subsequent boot would re-activate
silently.
3. local/recipes/system/redbear-usb-hotplugd/source/src/main.rs —
the 'if let Some(ref mut child) = dev.child { let _ = child.kill(); }'
in the disconnect path now logs on kill() failure (log::warn) so
a leaked USB driver child produces a visible warning.
Found by the Round 14 audit (local/docs/3D-DESKTOP-COMPREHENSIVE-PLAN.md §10).
vasilito
5682072e58