From bf84940f9021950c80846e6b1a5f8b0b55991b00 Mon Sep 17 00:00:00 2001
From: Stefano Barbato <stefano@parkopedia.com>
Date: Sat, 27 Apr 2019 15:00:58 +0200
Subject: [PATCH] better mmap error check

---
 mimetic/os/mmfile.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mimetic/os/mmfile.cxx b/mimetic/os/mmfile.cxx
index dfc95b7..9627516 100644
--- a/mimetic/os/mmfile.cxx
+++ b/mimetic/os/mmfile.cxx
@@ -57,7 +57,7 @@ bool MMFile::open(int mode)
 bool MMFile::map()
 {
     m_beg = (char*) mmap(0, m_st.st_size, PROT_READ, MAP_SHARED,m_fd,0);
-    if(m_beg > 0)
+    if(m_beg != MAP_FAILED)
     {
         m_end = m_beg + m_st.st_size;
         #if HAVE_MADVISE