ladybird/Kernel/Syscalls/link.cpp

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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/VirtualFileSystem.h>
#include <Kernel/Process.h>
namespace Kernel {
KResultOr<FlatPtr> Process::sys$link(Userspace<const Syscall::SC_link_params*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(cpath);
Syscall::SC_link_params params;
if (!copy_from_user(&params, user_params))
return EFAULT;
auto old_path_or_error = try_copy_kstring_from_user(params.old_path);
if (old_path_or_error.is_error())
return old_path_or_error.error();
auto new_path_or_error = try_copy_kstring_from_user(params.new_path);
if (new_path_or_error.is_error())
return new_path_or_error.error();
return VirtualFileSystem::the().link(old_path_or_error.value()->view(), new_path_or_error.value()->view(), current_directory());
}
KResultOr<FlatPtr> Process::sys$symlink(Userspace<const Syscall::SC_symlink_params*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(cpath);
Syscall::SC_symlink_params params;
if (!copy_from_user(&params, user_params))
return EFAULT;
auto target = get_syscall_path_argument(params.target);
if (target.is_error())
return target.error();
auto linkpath = get_syscall_path_argument(params.linkpath);
if (linkpath.is_error())
return linkpath.error();
return VirtualFileSystem::the().symlink(target.value()->view(), linkpath.value()->view(), current_directory());
}
}