Merge branch 'fix-sigalrm' into 'master'

Disable SIGARLM timer delivery

See merge request redox-os/relibc!1202

src/platform/redox/timer.rs

@@ -9,7 +9,7 @@ use crate::{
         time::timer_internal_t,
     },
     out::Out,
-    platform::{Pal, PalSignal, Sys, sys::event, types::c_void},
+    platform::{Pal, Sys, sys::event, types::c_void},
 };
 use core::{
     mem::{MaybeUninit, size_of},
@@ -42,14 +42,12 @@ pub extern "C" fn timer_routine(arg: *mut c_void) -> *mut c_void {
                 fun(timer_st.evp.sigev_value);
             }
         } else if timer_st.evp.sigev_notify == SIGEV_SIGNAL {
-            // process_pid != 0 => process-wide delivery (used by alarm())
-            // process_pid == 0 => thread-specific delivery (used by timer_create)
-            let result = if timer_st.process_pid != 0 {
-                Sys::kill(timer_st.process_pid, timer_st.evp.sigev_signo)
-            } else {
-                unsafe { Sys::rlct_kill(timer_st.caller_thread, timer_st.evp.sigev_signo as _) }
-            };
-            if result.is_err() {
+            // TODO: This will deliver signal to process, which is required for alarm()
+            //       Until it can bypass the exec() boundary, do not uncomment this code
+            // if timer_st.process_pid != 0 && Sys::kill(timer_st.process_pid, timer_st.evp.sigev_signo).is_err() { break; } else
+            if unsafe { Sys::rlct_kill(timer_st.caller_thread, timer_st.evp.sigev_signo as _) }
+                .is_err()
+            {
                 break;
             }
         }