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/* -*- Mode: Vala; indent-tabs-mode: nil; tab-width: 2 -*- */
/*
This file is part of Déjà Dup.
© 2008,2009,2010,2011 Michael Terry <mike@mterry.name>
Déjà Dup 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 3 of the License, or
(at your option) any later version.
Déjà Dup 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 Déjà Dup. If not, see <http://www.gnu.org/licenses/>.
*/
using GLib;
namespace DejaDup {
public class OperationRestore : Operation
{
public string dest {get; construct;} // Directory user wants to put files in
public string time {get; construct;} // Date user wants to restore to
string source; // Directory duplicity puts files in
List<string> errors;
private List<File> _restore_files;
public List<File> restore_files {
get {
return this._restore_files;
}
construct {
foreach (File f in this._restore_files)
f.unref();
this._restore_files = value.copy();
foreach (File f in this._restore_files)
f.ref();
}
}
public OperationRestore(string dest_in,
string? time_in = null,
List<File>? files_in = null,
uint xid = 0) {
Object(xid: xid, dest: dest_in, time: time_in, restore_files: files_in,
mode: Mode.RESTORE);
}
public async override void start()
{
action_desc_changed(_("Restoring files…"));
base.start();
}
protected override void connect_to_dup()
{
base.connect_to_dup();
dup.restore_files = restore_files;
}
protected override List<string>? make_argv() throws Error
{
if (DuplicityInfo.get_default().has_rename_arg)
source = dest;
else {
source = Path.build_filename(Environment.get_tmp_dir(), "deja-dup-XXXXXX");
source = DirUtils.mkdtemp(source);
}
List<string> argv = new List<string>();
if (time != null)
argv.append("--restore-time=%s".printf(time));
dup.local = File.new_for_path(source);
return argv;
}
protected async override void operation_finished(Duplicity dup, bool success, bool cancelled)
{
if (success) {
fixup_home_dir();
if (!mv_source_to_dest())
success = false;
else {
cleanup_source();
try {DejaDup.update_last_run_timestamp(DejaDup.TimestampType.RESTORE);}
catch (Error e) {warning("%s\n", e.message);}
}
}
else if (!cancelled) {
// Error case. TODO: Should tell user about partial restore in /tmp
}
else
cleanup_source();
base.operation_finished(dup, success, cancelled);
}
/**
* The idea here is to cover the following scenario:
* I backup my machine as user 'bob'
* I recover on another machine as user 'robert'
* For the simple case (one home dir), we can note this and correct it.
* We even cover the case of having backed up as root, and having a home dir
* of /root.
*
* This rejiggering is all done inside the source directory before we move it
* to its destination.
*/
void fixup_home_dir()
{
if (DuplicityInfo.get_default().has_rename_arg)
return; // skip it, duplicity is doing this for us
string ideal_home = Path.build_filename(source, Environment.get_home_dir());
if (FileUtils.test(ideal_home, FileTest.EXISTS | FileTest.IS_DIR))
return;
// We check if there is only one /home/XXXXXX directory in restored files.
// If so, we make sure it matches current user directory.
string current_home = null;
string strd = Path.build_filename(source, "home");
Dir d;
try { d = Dir.open(strd); }
catch (FileError e) { d = null; }
if (d != null) {
string child = d.read_name();
weak string end = d.read_name();
if (end != null) {
return; // more than one home dir, we don't know which they want
}
if (child != null) { // exactly one home dir, will rename
current_home = Path.build_filename(strd, child);
if (!FileUtils.test(current_home, FileTest.IS_DIR))
current_home = null;
}
}
if (current_home == null) { // hmm, no home dirs... Check /root
current_home = Path.build_filename(source, "root");
if (!FileUtils.test(current_home, FileTest.EXISTS | FileTest.IS_DIR))
current_home = null;
}
if (current_home != null) {
// Ideal home may not have all parents ("/home" part) yet
string dirname = Path.get_dirname(ideal_home);
DirUtils.create_with_parents(dirname, 0755);
FileUtils.rename(current_home, ideal_home);
}
}
void show_errors()
{
// Various file errors piled up as we restored everything to its rightful
// place. Show them as a big ol' list, and let the user know that
// they can still get the files in /tmp.
var len = errors.length();
string detail = null;
if (len > 1) {
string[] error_array = new string[len + 1];
int i = 0;
foreach (string err in errors)
error_array[i++] = err;
error_array[i] = null;
detail = string.joinv("\n\n", error_array);
}
var error_text = _("Not all files could be restored. Any files that could not be restored may still be found in %s.").printf(source);
if (detail == null)
error_text += "\n\n" + errors.data;
raise_error(error_text, detail);
}
void add_error(string relpath, string errstr)
{
errors.append(_("Could not restore %s: %s").printf(
relpath, errstr));
}
void mv_error(RecursiveOp move, File src, File dst, string errstr)
{
var dest_top = File.new_for_path(dest);
var relative_dst = dest_top.get_relative_path(dst);
if (relative_dst == null || relative_dst == "")
relative_dst = dest;
add_error(relative_dst, errstr);
}
bool mv_source_to_dest()
{
if (DuplicityInfo.get_default().has_rename_arg)
return true; // skip it, duplicity is doing this for us
errors = new List<string>();
var destf = File.new_for_path(dest);
var sourcef = File.new_for_path(source);
// If we're doing a full restore, just move the whole thing over.
// But if we asked duplicity to restore specific files, it created
// the parent directories itself without making sure they have the same
// permissions as the directories in the backup. So we go and specifically
// move each of the specific files over, ignoring their parent directories.
if (restore_files == null) {
var move = new RecursiveMove(sourcef, destf);
move.raise_error.connect(mv_error);
move.start();
}
else {
File root = File.new_for_path("/");
foreach (File f in restore_files) {
var rel_file_path = root.get_relative_path(f);
var full_source = sourcef.resolve_relative_path(rel_file_path);
var full_dest = destf.resolve_relative_path(rel_file_path);
try {
full_dest.make_directory_with_parents(null);
}
catch (Error e) {warning("%s\n", e.message);}
var move = new RecursiveMove(full_source, full_dest);
move.raise_error.connect(mv_error);
move.start();
}
}
if (errors != null) {
show_errors();
return false;
}
else
return true;
}
void cleanup_source()
{
if (DuplicityInfo.get_default().has_rename_arg)
return; // skip it, source=dest
File sourcef = File.new_for_path(source);
var move = new RecursiveDelete(sourcef);
move.start();
}
}
} // end namespace
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