handle mmap() failures

diff --git a/util.c b/util.c
index f1665e3..357b830 100644 (file)
--- a/util.c
+++ b/util.c
@@ -47,8 +47,12 @@ struct map_struct *map_file(int fd,OFF_T len)
   ret->p_len = 0;
 
 #ifdef HAVE_MMAP
-  if (len < MAX_MAP_SIZE)
-    ret->map = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
+  if (len < MAX_MAP_SIZE) {
+         ret->map = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
+         if (ret->map == (char *)-1) {
+                 ret->map = NULL;
+         }
+  }
 #endif
   return ret;
 }