From 36ccadb98b92786dc65af4294851ed538d7166e5 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sat, 4 Feb 2012 21:28:14 +0000
Subject: -do not try to mmap empty file

---
 src/fs/gnunet-fs-gtk_common.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/fs/gnunet-fs-gtk_common.c b/src/fs/gnunet-fs-gtk_common.c
index 90077f52..a987b25a 100644
--- a/src/fs/gnunet-fs-gtk_common.c
+++ b/src/fs/gnunet-fs-gtk_common.c
@@ -210,6 +210,11 @@ GNUNET_FS_GTK_mmap_and_scan (const char *filename,
     GNUNET_break (0);
     return GNUNET_SYSERR;
   }
+  if (0 == fsize)
+  {
+    /* empty file, cannot be a directory */
+    return GNUNET_SYSERR;
+  }
   if (NULL == (fh = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_READ,
 					   GNUNET_DISK_PERM_NONE)))
   {
-- 
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