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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/StringBuilder.h>
28#include <AK/StringView.h>
29#include <AK/Vector.h>
30#include <Kernel/FileSystem/Custody.h>
31#include <Kernel/FileSystem/Inode.h>
32
33namespace Kernel {
34
35Custody::Custody(Custody* parent, const StringView& name, Inode& inode, int mount_flags)
36 : m_parent(parent)
37 , m_name(name)
38 , m_inode(inode)
39 , m_mount_flags(mount_flags)
40{
41}
42
43Custody::~Custody()
44{
45}
46
47String Custody::absolute_path() const
48{
49 if (!parent())
50 return "/";
51 Vector<const Custody*, 32> custody_chain;
52 for (auto* custody = this; custody; custody = custody->parent())
53 custody_chain.append(custody);
54 StringBuilder builder;
55 for (int i = custody_chain.size() - 2; i >= 0; --i) {
56 builder.append('/');
57 builder.append(custody_chain[i]->name().characters());
58 }
59 return builder.to_string();
60}
61
62}