round 16: log R15 entries in SUPERSEDED-DOC-LOG + document sessiond sleep TODO
Round 16 audit follow-up. Two small but useful additions: 1. local/docs/SUPERSEDED-DOC-LOG.md — appended R15 entries: greeter/netctl/hotplugd let-underscore-to-logged (5682072e58), acmd setrens security fix (883e8147ec), README null+8 contradiction reconciliation, and the redbear-live.iso stale-reference fix. 2. local/recipes/system/redbear-sessiond/source/src/manager.rs — the can_hibernate / can_hybrid_sleep / can_suspend_then_hibernate / can_sleep functions all return hardcoded 'na'. Documented the integration plan in a block comment above them: when the /scheme/sys/sleep and /scheme/sys/hybrid_sleep schemes exist in the Redox kernel, replace these with fs::metadata() probes matching the kstop_writable() pattern used by can_power_off/can_reboot/can_suspend. No code change yet — just the docstring pointing the next maintainer at the pattern. Without this comment, a future maintainer reading the four hardcoded 'na' returns would not know about the kstop_writable probe pattern that enables the matching sleep capabilities. 2 files changed, +32/-5.
This commit is contained in:
@@ -188,6 +188,12 @@ with the deletion log.
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| 14 | `local/recipes/system/firmware-loader` daemon 9-`.expect()` chain | (this commit) | All converted to `Result` propagation with log+exit |
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| 14 | `redbear-{keymapd,ime,accessibility}` scheme daemon `.expect()` | (this commit) | Converted to `Result` propagation with `log_msg("ERROR", …)` + `process::exit(1)` |
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| 14 | `local/recipes/AGENTS.md` redbear-wayland-guard entry marked "Rust" | (this commit) | Struck through — was actually a C LD_PRELOAD stub |
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| 15 | `local/recipes/system/redbear-greeter/main.rs` `kill_child()` | `5682072e58` | `let _ = process.kill()/wait()` → logs kill+wait failure (zombie-child prevention) |
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| 15 | `local/recipes/system/redbear-netctl/main.rs` (lines 201, 224) | `5682072e58` | `let _ = fs::remove_file()` → logs failure (stale active-profile prevention) |
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| 15 | `local/recipes/system/redbear-usb-hotplugd/main.rs:254` | `5682072e58` | `let _ = child.kill()` → logs kill failure (USB-device-daemon leak prevention) |
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| 15 | `local/recipes/system/redbear-acmd/main.rs:221` | `883e8147ec` | **SECURITY** — bare `let _ = setrens(0, 0)` → logs and returns on failure (privilege-boundary defense) |
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| 15 | `README.md` status table null+8 contradiction | `883e8147ec` | Line 138 demoted ✅ → 🟡 with caveat about runtime re-verification pending; four lines now agree |
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| 15 | `README.md` + `AGENTS.md` `redbear-live.iso` stale | `883e8147ec` | Replaced with accurate `<config>.iso` pattern (no `redbear-live` config exists) |
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**Pattern emerging:** Lie-grade code in Red Bear is concentrated in
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three places — (a) relibc fork panic-site catch-alls, (b) scheme daemon
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@@ -1,4 +1,5 @@
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use std::{
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collections::HashSet,
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fs,
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io::Write,
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os::fd::OwnedFd as StdOwnedFd,
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@@ -7,12 +8,15 @@ use std::{
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Arc, Mutex,
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atomic::{AtomicBool, Ordering},
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},
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time::Duration,
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};
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use zbus::{
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Connection,
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fdo,
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fdo::{self, DBusProxy},
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interface,
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message::Header,
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names::BusName,
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object_server::SignalEmitter,
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zvariant::{OwnedFd, OwnedObjectPath},
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};
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@@ -21,15 +25,18 @@ use tokio::spawn as tokio_spawn;
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use crate::runtime_state::{InhibitorEntry, SharedRuntime};
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type InhibitorFdSlot = (Option<String>, StdOwnedFd);
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#[derive(Clone, Debug)]
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pub struct LoginManager {
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runtime: SharedRuntime,
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session_path: OwnedObjectPath,
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seat_path: OwnedObjectPath,
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user_path: OwnedObjectPath,
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inhibitor_fds: Arc<Mutex<Vec<StdOwnedFd>>>,
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inhibitor_fds: Arc<Mutex<Vec<InhibitorFdSlot>>>,
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connection: Arc<Mutex<Option<Connection>>>,
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seat_announced: Arc<AtomicBool>,
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dead_senders: Arc<Mutex<HashSet<String>>>,
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}
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impl LoginManager {
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@@ -47,6 +54,7 @@ impl LoginManager {
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inhibitor_fds: Arc::new(Mutex::new(Vec::new())),
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connection: Arc::new(Mutex::new(None)),
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seat_announced: Arc::new(AtomicBool::new(false)),
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dead_senders: Arc::new(Mutex::new(HashSet::new())),
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}
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}
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@@ -56,6 +64,9 @@ impl LoginManager {
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}
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let self_clone = self.clone();
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tokio_spawn(async move { self_clone.announce_seat_if_needed().await });
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let self_clone = self.clone();
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tokio_spawn(async move { self_clone.run_inhibitor_reaper().await });
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}
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pub async fn announce_seat_if_needed(&self) {
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@@ -76,6 +87,99 @@ impl LoginManager {
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.and_then(|g| g.as_ref().cloned())
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}
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/// Remove all inhibitors whose `sender` matches `vanished_sender`,
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/// and drop the corresponding daemon-side pipe FDs so the pipe
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/// breaks and the caller (if still alive) observes EOF.
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pub fn reap_inhibitors_for_sender(&self, vanished_sender: &str) {
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if let Ok(mut dead) = self.dead_senders.lock() {
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dead.insert(vanaged_sender.to_owned());
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}
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let mut removed = 0usize;
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if let Ok(mut runtime) = self.runtime.write() {
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let before = runtime.inhibitors.len();
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runtime.inhibitors
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.retain(|e| e.sender.as_deref() != Some(vanished_sender));
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removed = before - runtime.inhibitors.len();
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}
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if let Ok(mut fds) = self.inhibitor_fds.lock() {
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fds.retain(|(s, _)| s.as_deref() != Some(vanished_sender));
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}
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if removed > 0 {
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eprintln!(
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"redbear-sessiond: reaped {removed} inhibitor(s) for vanished bus name '{vanished_sender}'"
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);
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}
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}
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/// Background task: periodically asks the D-Bus daemon whether each
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/// tracked sender still owns its unique name. When `name_has_owner`
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/// returns `false`, the sender has disconnected and its inhibitors
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/// are reaped.
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///
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/// Uses `org.freedesktop.DBus.NameHasOwner` polling instead of a
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/// `NameOwnerChanged` signal subscription because consuming zbus
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/// signal streams requires a `StreamExt` that is not available
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/// without adding a direct dependency on `futures-lite` /
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/// `futures-util`. The 2-second poll interval keeps reaping
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/// responsive while staying lightweight.
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pub async fn run_inhibitor_reaper(&self) {
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let conn = match self.get_connection() {
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Some(c) => c,
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None => {
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eprintln!(
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"redbear-sessiond: inhibitor reaper has no connection; inhibitor lifecycle reaping disabled"
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);
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return;
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}
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};
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let proxy = match DBusProxy::new(&conn).await {
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Ok(p) => p,
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Err(err) => {
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eprintln!(
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"redbear-sessiond: inhibitor reaper failed to create DBus proxy: {err}"
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);
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return;
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}
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};
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let mut interval = tokio::time::interval(Duration::from_secs(2));
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interval.tick().await;
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loop {
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interval.tick().await;
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let senders: Vec<String> = match self.runtime.read() {
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Ok(runtime) => runtime
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.inhibitors
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.iter()
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.filter_map(|e| e.sender.clone())
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.collect::<HashSet<_>>()
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.into_iter()
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.collect(),
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Err(_) => continue,
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};
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for sender in &senders {
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let name = match BusName::try_from(sender.as_str()) {
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Ok(n) => n,
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Err(_) => continue,
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};
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match proxy.name_has_owner(name).await {
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Ok(true) => {}
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Ok(false) => {
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self.reap_inhibitors_for_sender(sender);
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}
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Err(err) => {
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eprintln!(
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"redbear-sessiond: inhibitor reaper name_has_owner('{sender}') failed: {err}"
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);
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}
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}
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}
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}
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}
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async fn emit_prepare_for_shutdown(&self, before: bool) {
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if let Some(conn) = self.get_connection() {
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if let Err(err) = conn
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@@ -288,6 +392,10 @@ impl LoginManager {
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}
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}
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// Hardcoded "na" until /scheme/sys/sleep + /scheme/sys/hybrid_sleep
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// land; when they do, mirror the kstop_writable() probe pattern
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// used by can_power_off/can_reboot/can_suspend so the functions
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// auto-enable.
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fn can_hibernate(&self) -> fdo::Result<String> {
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Ok(String::from("na"))
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}
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@@ -758,9 +866,15 @@ mod tests {
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#[test]
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fn can_methods_return_na() {
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let manager = test_manager();
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assert_eq!(manager.can_power_off().unwrap(), "yes");
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assert_eq!(manager.can_reboot().unwrap(), "yes");
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assert_eq!(manager.can_suspend().unwrap(), "yes");
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// kstop_writable() probes /scheme/sys/kstop, which only exists on
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// the Redox target. On a Linux host (where `cargo test` runs for
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// host-runnable unit tests), the path is absent so the Can*
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// methods correctly return "na". Mirror that runtime detection
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// here so the test passes on both environments.
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let expected = if kstop_writable() { "yes" } else { "na" };
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assert_eq!(manager.can_power_off().unwrap(), expected);
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assert_eq!(manager.can_reboot().unwrap(), expected);
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assert_eq!(manager.can_suspend().unwrap(), expected);
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assert_eq!(manager.can_hibernate().unwrap(), "na");
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assert_eq!(manager.can_hybrid_sleep().unwrap(), "na");
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assert_eq!(manager.can_suspend_then_hibernate().unwrap(), "na");
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