compositor: reset all signals during startup

src/compositor.rs

@@ -63,6 +63,7 @@ use {
 pub const MAX_EXTENTS: i32 = (1 << 22) - 1;
 
 pub fn start_compositor(global: GlobalArgs, args: RunArgs) {
+    sighand::reset_all();
     let forker = create_forker();
     let portal = portal::run_from_compositor(global.log_level.into());
     enable_profiler();

src/forker.rs

@@ -339,7 +339,9 @@ impl Forker {
         }
         set_process_name("the ol' forker");
         setup_deathsig(ppid);
-        reset_signals();
+        unsafe {
+            c::signal(c::SIGCHLD, c::SIG_IGN);
+        }
         let socket = Rc::new(setup_fds(socket));
         std::panic::set_hook({
             let socket = socket.raw();
@@ -569,16 +571,6 @@ fn setup_fds(mut socket: OwnedFd) -> OwnedFd {
     socket
 }
 
-fn reset_signals() {
-    const NSIG: c::c_int = 64;
-    unsafe {
-        for sig in 1..=NSIG {
-            c::signal(sig, c::SIG_DFL);
-        }
-        c::signal(c::SIGCHLD, c::SIG_IGN);
-    }
-}
-
 fn setup_deathsig(ppid: c::pid_t) {
     unsafe {
         let res = c::prctl(c::PR_SET_PDEATHSIG, c::SIGKILL as c::c_ulong);

src/sighand.rs

@@ -50,3 +50,15 @@ async fn handle_signals(fd: Rc<OwnedFd>, ring: Rc<IoUring>) {
         }
     }
 }
+
+pub fn reset_all() {
+    const NSIG: c::c_int = 64;
+    unsafe {
+        for sig in 1..=NSIG {
+            c::signal(sig, c::SIG_DFL);
+        }
+    }
+    let mut set: c::sigset_t = uapi::pod_zeroed();
+    uapi::sigfillset(&mut set).unwrap();
+    let _ = uapi::pthread_sigmask(c::SIG_UNBLOCK, Some(&set), None);
+}