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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
open Sysprep_gettext.Gettext
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";
enabled_by_default = true;
heading = s_"Generate random seed for guest";
pod_description = Some (s_"\
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
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