From b1044cfa8f655eebab63e21a016cf8124bef5ca7 Mon Sep 17 00:00:00 2001
From: Stephen Heumann <heumann1@illinois.edu>
Date: Sun, 4 Jan 2015 15:45:25 -0600
Subject: [PATCH] Properly report exit status values with the high bit set
 (128-255).

These were being reported as strange values because the WEXITSTATUS macro from the GNO headers would erroneously sign-extend them.

Thanks to Kelvin Sherlock for posting an example that demonstrated this problem.
---
 include/libbb.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/libbb.h b/include/libbb.h
index 8229f055a..31a1e46a4 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -62,6 +62,11 @@
 # include <sys/sysmacros.h>
 #endif
 #include <sys/wait.h>
+#ifdef __GNO__
+/* Fix definition of WEXITSTATUS to support values with the high bit set. */
+# undef WEXITSTATUS
+# define WEXITSTATUS(x)	(((*(int *)&(x)) >> 8) & 0xFF)
+#endif
 #include <time.h>
 #include <sys/param.h>
 #include <pwd.h>