/* * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org> * * SPDX-License-Identifier: BSD-2-Clause */ #include <AK/RefPtr.h> #include <Kernel/FileSystem/Custody.h> #include <Kernel/FileSystem/VirtualFileSystem.h> #include <Kernel/Process.h> namespace Kernel { ErrorOr<FlatPtr> Process::sys$fstat(int fd, Userspace<stat*> user_statbuf) { VERIFY_NO_PROCESS_BIG_LOCK(this); TRY(require_promise(Pledge::stdio)); auto description = TRY(open_file_description(fd)); auto buffer = TRY(description->stat()); TRY(copy_to_user(user_statbuf, &buffer)); return 0; } ErrorOr<FlatPtr> Process::sys$stat(Userspace<Syscall::SC_stat_params const*> user_params) { VERIFY_NO_PROCESS_BIG_LOCK(this); TRY(require_promise(Pledge::rpath)); auto params = TRY(copy_typed_from_user(user_params)); auto path = TRY(get_syscall_path_argument(params.path)); auto base = TRY(custody_for_dirfd(params.dirfd)); auto metadata = TRY(VirtualFileSystem::the().lookup_metadata(credentials(), path->view(), *base, params.follow_symlinks ? 0 : O_NOFOLLOW_NOERROR)); auto statbuf = TRY(metadata.stat()); TRY(copy_to_user(params.statbuf, &statbuf)); return 0; } }