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Kernel+Userland: Remove chroot functionality

Browse source 
We are not using this for anything and it's just been sitting there
gathering dust for well over a year, so let's stop carrying all this
complexity around for no good reason.
This commit is contained in:
Andreas Kling 2021-08-15 01:29:44 +02:00
parent 96d5d017b7
commit 1b739a72c2
19 changed files with 3 additions and 289 deletions
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38
Kernel/Syscalls/chroot.cpp
View file

@ -1,38 +0,0 @@
/*
* 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<FlatPtr> Process::sys$chroot(Userspace<const char*> user_path, size_t path_length, int mount_flags)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
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 = VirtualFileSystem::the().open_directory(path.value()->view(), 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;
}
}

2
Kernel/Syscalls/fork.cpp
View file

@ -21,8 +21,6 @@ KResultOr<FlatPtr> Process::sys$fork(RegisterState& regs)
auto child = Process::create(child_first_thread, m_name, uid(), gid(), pid(), m_is_kernel_process, m_cwd, m_executable, m_tty, this);
if (!child || !child_first_thread)
return ENOMEM;
child->m_root_directory = m_root_directory;
child->m_root_directory_relative_to_global_root = m_root_directory_relative_to_global_root;
child->m_veil_state = m_veil_state;
child->m_unveiled_paths = m_unveiled_paths.deep_copy();

2
Kernel/Syscalls/unveil.cpp
View file

@ -92,7 +92,7 @@ KResultOr<FlatPtr> Process::sys$unveil(Userspace<const Syscall::SC_unveil_params
// If this case is encountered, the parent node of the path is returned and the custody of that inode is used instead.
RefPtr<Custody> parent_custody; // Parent inode in case of ENOENT
OwnPtr<KString> new_unveiled_path;
auto custody_or_error = VirtualFileSystem::the().resolve_path_without_veil(path.view(), root_directory(), &parent_custody);
auto custody_or_error = VirtualFileSystem::the().resolve_path_without_veil(path.view(), VirtualFileSystem::the().root_custody(), &parent_custody);
if (!custody_or_error.is_error()) {
new_unveiled_path = custody_or_error.value()->try_create_absolute_path();
if (!new_unveiled_path)