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(* virt-v2v
* Copyright (C) 2009-2024 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 Std_utils
open Tools_utils
open Unix_utils
open Common_gettext.Gettext
open Printf
let start_nbdkit ~server ?port ?user ?password path =
(* Create a random location for the socket used to talk to nbdkit. *)
let sockdir = Mkdtemp.temp_dir "v2vssh." in
On_exit.rm_rf sockdir;
let id = unique () in
let socket = sockdir // sprintf "nbdkit%d.sock" id in
(* Note: Disabling the retry filter helps in the missing file case,
* otherwise nbdkit takes ages to time out. We're not expecting that
* the VMX file is large, so using this filter isn't necessary.
*)
let nbdkit =
Nbdkit_ssh.create_ssh ~retry:false ?password ~server ?port ?user path in
Nbdkit.set_readonly nbdkit true;
let _, pid = Nbdkit.run_unix socket nbdkit in
On_exit.kill pid;
(* Return the URI of nbdkit. *)
"nbd+unix://?socket=" ^ socket
(* Download a remote file into a local file. *)
let download_file ~server ?port ?user ?password path output =
let uri = start_nbdkit ~server ?port ?user ?password path in
let cmd = [ "nbdcopy"; uri; output ] in
if run_command cmd <> 0 then
error (f_"could not copy the VMX file from the remote server, \
see earlier error messages")
(* Test if [path] exists on the remote server. *)
let remote_file_exists ~server ?port ?user ?password path =
let uri = start_nbdkit ~server ?port ?user ?password path in
(* Testing that we can connect to the nbdkit server is enough to
* prove the remote file exists.
*)
let cmd = [ "nbdinfo"; "--can"; "connect"; uri ] in
run_command cmd = 0
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