X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=generator%2Fgenerator_utils.ml;fp=generator%2Fgenerator_utils.ml;h=4180c0d634a203dfa1e9f35239b220dbe55e0367;hp=f62b195661c9b60acf78902aaffba2de8e4b9f68;hb=4ee190628bc05f0c8fad1f6d9c3e85619a91e8b8;hpb=1f59849a4a45a1c78488eb41b250de631b4405a6

diff --git a/generator/generator_utils.ml b/generator/generator_utils.ml
index f62b195..4180c0d 100644
--- a/generator/generator_utils.ml
+++ b/generator/generator_utils.ml
@@ -55,6 +55,14 @@ let string_of_errcode = function
  *)
 let uuidgen () =
   let s = Digest.to_hex (Digest.file "generator/generator_actions.ml") in
+
+  (* In util-linux <= 2.19, mkswap -U cannot handle the first byte of
+   * the UUID being zero, so we artificially rewrite such UUIDs.
+   * http://article.gmane.org/gmane.linux.utilities.util-linux-ng/4273
+   *)
+  if s.[0] = '0' && s.[1] = '0' then
+    s.[0] <- '1';
+
   String.sub s 0 8 ^ "-"
   ^ String.sub s 8 4 ^ "-"
   ^ String.sub s 12 4 ^ "-"