ema-measure: Pass through the exit code of the wrapped program

src/ema-measure/main.c

@@ -29,12 +29,15 @@ int main(int argc, char **argv)
 	if (pid == 0)
 		execvp(argv[1], &argv[1]);
 
-	ret = waitpid(pid, NULL, 0);
+	int status = 0;
+
+	ret = waitpid(pid, &status, 0);
 	if (ret == -1) {
 		perror("Waiting for child process failed");
 		return EXIT_FAILURE;
 	}
 
+
 	EMA_region_end(region);
 
 	ret = EMA_finalize();
@@ -43,5 +46,8 @@ int main(int argc, char **argv)
 		return EXIT_FAILURE;
 	}
 
-	return EXIT_SUCCESS;
+	if (!WIFEXITED(status))
+		return EXIT_FAILURE;
+
+	return WEXITSTATUS(status);
 }