Return exit code when MANUALLY_TRAP_SIG is exported (#2285)

images/Dockerfile

@@ -18,6 +18,7 @@ RUN curl -f -L -o runner-container-hooks.zip https://github.com/actions/runner-c
 FROM mcr.microsoft.com/dotnet/runtime-deps:6.0
 
 ENV RUNNER_ALLOW_RUNASROOT=1
+ENV RUNNER_MANUALLY_TRAP_SIG=1
 
 WORKDIR /actions-runner
 COPY --from=build /actions-runner .

src/Misc/layoutroot/run.sh

@@ -48,7 +48,7 @@ runWithManualTrap() {
             trap - INT TERM
             # wait for last parts to be logged
             wait $PID
-            exit 0
+            exit $returnCode
         fi
     done
 }