be verbose about error and workaround slow console

In case the domu runs very quickly, there will be a complete failure
to observe any output.  Therefore, in case we exit with val != 0,
sleep a bit.  This is a cheap and dirty workaround.

diff --git a/lib/emul.c b/lib/emul.c
index e9bc299e4b89c828c9c6dddfa85a722f13f0062e..7b3fdc177b98aec83ffbd85a1d3847ceac06f7b9 100644 (file)
--- a/lib/emul.c
+++ b/lib/emul.c
@@ -96,7 +96,13 @@ void __dead
 _exit(int eval)
 {
        /* XXX this duplicates _app_main / callmain cleanup */
-       minios_printk("\n=== _exit(%d) called ===\n", eval);
+       if (eval) {
+               minios_printk("\n=== ERROR: _exit(%d) called ===\n", eval);
+               /* XXX: work around the console being slow to attach */
+               sleep(1);
+       } else {
+               minios_printk("\n=== _exit(%d) called ===\n", eval);
+       }
        _rumprun_deconfig();
        _netbsd_fini();
        minios_stop_kernel();