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https://github.com/libguestfs/libguestfs.git
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2b59b5f1d2
Operations that need to work directly on guest block devices will fail because the block devices are busy. Therefore add a phase with the filesystems unmounted, and allow operations to specify that they need to work in this phase.
62 lines
1.8 KiB
OCaml
62 lines
1.8 KiB
OCaml
(* virt-sysprep
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* Copyright (C) 2012 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*)
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open Sysprep_operation
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open Sysprep_gettext.Gettext
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module G = Guestfs
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let random_seed_perform g root =
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let typ = g#inspect_get_type root in
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if typ = "linux" then (
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let files = [
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"/var/lib/random-seed"; (* Fedora *)
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"/var/lib/urandom/random-seed"; (* Debian *)
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] in
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List.iter (
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fun file ->
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if g#is_file file then (
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(* Get 8 bytes of randomness from the host. *)
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let chan = open_in "/dev/urandom" in
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let buf = String.create 8 in
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really_input chan buf 0 8;
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close_in chan;
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g#write file buf
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)
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) files;
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[ `Created_files ]
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)
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else []
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let random_seed_op = {
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name = "random-seed";
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enabled_by_default = true;
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heading = s_"Generate random seed for guest";
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pod_description = Some (s_"\
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Write some random bytes from the host into the random seed file of the
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guest.
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See L</RANDOM SEED> below.");
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extra_args = [];
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perform_on_filesystems = Some random_seed_perform;
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perform_on_devices = None;
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}
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let () = register_operation random_seed_op
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