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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringView.h>
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/Process.h>
namespace Kernel {
KResultOr<int> Process::sys$chroot(Userspace<const char*> user_path, size_t path_length, int mount_flags)
{
if (!is_superuser())
return EPERM;
REQUIRE_PROMISE(chroot);
auto path = get_syscall_path_argument(user_path, path_length);
if (path.is_error())
return path.error();
auto directory_or_error = VFS::the().open_directory(path.value(), current_directory());
if (directory_or_error.is_error())
return directory_or_error.error();
auto directory = directory_or_error.value();
m_root_directory_relative_to_global_root = directory;
int chroot_mount_flags = mount_flags == -1 ? directory->mount_flags() : mount_flags;
auto custody_or_error = Custody::try_create(nullptr, "", directory->inode(), chroot_mount_flags);
if (custody_or_error.is_error())
return custody_or_error.error();
set_root_directory(custody_or_error.release_value());
return 0;
}
}
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