1 files changed, 57 insertions, 0 deletions
diff --git a/sysprep/sysprep_operation_random_seed.ml b/sysprep/sysprep_operation_random_seed.ml
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+++ b/sysprep/sysprep_operation_random_seed.ml
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+(* virt-sysprep
+ * Copyright (C) 2012 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+open Sysprep_operation
+
+module G = Guestfs
+
+let random_seed_perform g root =
+  let typ = g#inspect_get_type root in
+  if typ = "linux" then (
+    let files = [
+      "/var/lib/random-seed"; (* Fedora *)
+      "/var/lib/urandom/random-seed"; (* Debian *)
+    ] in
+    List.iter (
+      fun file ->
+        if g#is_file file then (
+          (* Get 8 bytes of randomness from the host. *)
+          let chan = open_in "/dev/urandom" in
+          let buf = String.create 8 in
+          really_input chan buf 0 8;
+          close_in chan;
+
+          g#write file buf
+        )
+    ) files;
+    [ `Created_files ]
+  )
+  else []
+
+let random_seed_op = {
+  name = "random-seed";
+  pod_description = "\
+Write some random bytes from the host into the random seed file of the
+guest.
+
+See L</RANDOM SEED> below.";
+  extra_args = [];
+  perform = random_seed_perform;
+}
+
+let () = register_operation random_seed_op