# P2-misc-daemon-fixes.patch
#
# Various daemon error handling and robustness fixes:
# graceful degradation when audio hardware is absent,
# zerod argument handling and request loop resilience.
#
# Covers:
#   - audiod/main.rs: handle ENODEV when no audio hardware present
#   - zerod/main.rs: derive Copy for Ty, graceful argument parsing, resilient request loop
#
diff --git a/audiod/src/main.rs b/audiod/src/main.rs
index 51b103af..2354cf5f 100644
--- a/audiod/src/main.rs
+++ b/audiod/src/main.rs
@@ -48,7 +48,14 @@ fn daemon(daemon: SchemeDaemon) -> anyhow::Result<()> {
 
     let pid = libredox::call::getpid()?;
 
-    let hw_file = Fd::open("/scheme/audiohw", flag::O_WRONLY | flag::O_CLOEXEC, 0)?;
+    let hw_file = match Fd::open("/scheme/audiohw", flag::O_WRONLY | flag::O_CLOEXEC, 0) {
+        Ok(fd) => fd,
+        Err(err) if err.errno() == syscall::ENODEV => {
+            eprintln!("audiod: no audio hardware detected");
+            return Ok(());
+        }
+        Err(err) => return Err(err).context("failed to open /scheme/audiohw"),
+    };
 
     let socket = Socket::create().context("failed to create scheme")?;