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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringBuilder.h>
#include <AK/StringView.h>
#include <AK/Vector.h>
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/Inode.h>
namespace Kernel {
KResultOr<NonnullRefPtr<Custody>> Custody::try_create(Custody* parent, StringView name, Inode& inode, int mount_flags)
{
auto name_kstring = KString::try_create(name);
if (!name_kstring)
return ENOMEM;
auto custody = adopt_ref_if_nonnull(new (nothrow) Custody(parent, name_kstring.release_nonnull(), inode, mount_flags));
if (!custody)
return ENOMEM;
return custody.release_nonnull();
}
Custody::Custody(Custody* parent, NonnullOwnPtr<KString> name, Inode& inode, int mount_flags)
: m_parent(parent)
, m_name(move(name))
, m_inode(inode)
, m_mount_flags(mount_flags)
{
}
Custody::~Custody()
{
}
String Custody::absolute_path() const
{
if (!parent())
return "/";
Vector<const Custody*, 32> custody_chain;
for (auto* custody = this; custody; custody = custody->parent())
custody_chain.append(custody);
StringBuilder builder;
for (int i = custody_chain.size() - 2; i >= 0; --i) {
builder.append('/');
builder.append(custody_chain[i]->name());
}
return builder.to_string();
}
bool Custody::is_readonly() const
{
if (m_mount_flags & MS_RDONLY)
return true;
return m_inode->fs().is_readonly();
}
}
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