Index: src/daemon/response.c
===================================================================
--- src/daemon/response.c	(revision 15147)
+++ src/daemon/response.c	(working copy)
@@ -272,7 +272,10 @@
   struct MHD_Response *response = cls;
 
   (void) lseek (response->fd, pos + response->fd_off, SEEK_SET);
-  return read (response->fd, buf, max);
+  ssize_t n = read (response->fd, buf, max);
+  if (n == 0) return MHD_CONTENT_READER_END_OF_STREAM;
+  if (n < 0) return MHD_CONTENT_READER_END_WITH_ERROR;
+  else return n;
 }