-do not try to mmap empty file

1 files changed, 5 insertions, 0 deletions

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)))
   {