From 449824349bd9c8543d860202ce11881a27ca38c7 Mon Sep 17 00:00:00 2001
From: Stefan Lankes <slankes@eonerc.rwth-aachen.de>
Date: Mon, 25 Jul 2016 07:50:34 +0200
Subject: [PATCH] if libc_sd is invalid, the system call open returns an error
 number

---
 hermit/kernel/syscall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hermit/kernel/syscall.c b/hermit/kernel/syscall.c
index b7c64d808..f3d74181d 100644
--- a/hermit/kernel/syscall.c
+++ b/hermit/kernel/syscall.c
@@ -263,7 +263,7 @@ int sys_open(const char* name, int flags, int mode)
 
 	spinlock_lock(&lwip_lock);
 	if (libc_sd < 0) {
-		ret = 0;
+		ret = -EINVAL;
 		goto out;
 	}