From 74d63df24445cdb95f88f97d8008fb43443bfbc0 Mon Sep 17 00:00:00 2001
From: XinyuHou <xinyu@synergy-project.org>
Date: Wed, 7 Dec 2016 17:28:15 +0000
Subject: [PATCH] Fix incorrect check of return code from dup

---
 src/lib/arch/unix/ArchDaemonUnix.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lib/arch/unix/ArchDaemonUnix.cpp b/src/lib/arch/unix/ArchDaemonUnix.cpp
index 91933ab4..f12ee8f1 100644
--- a/src/lib/arch/unix/ArchDaemonUnix.cpp
+++ b/src/lib/arch/unix/ArchDaemonUnix.cpp
@@ -117,9 +117,11 @@ ArchDaemonUnix::daemonize(const char* name, DaemonFunc func)
 	open("/dev/null", O_RDWR);
 	
 	int dupErr = dup(1);
-	if (dupErr)
+
+	if (dupErr < 0) {
 		// NB: file logging actually isn't working at this point!
 		LOG((CLOG_ERR "dup error: %i", dupErr));
+	}
 	
 #ifdef __APPLE__
 	return execSelfNonDaemonized();