serenity/Kernel/Syscalls/utime.cpp

/*
 * 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/Tasks/Process.h>

namespace Kernel {

ErrorOr<FlatPtr> Process::sys$utime(Userspace<char const*> user_path, size_t path_length, Userspace<const struct utimbuf*> user_buf)
{
    VERIFY_NO_PROCESS_BIG_LOCK(this);
    TRY(require_promise(Pledge::fattr));
    auto path = TRY(get_syscall_path_argument(user_path, path_length));
    utimbuf buf;
    if (user_buf) {
        TRY(copy_from_user(&buf, user_buf));
    } else {
        auto now = kgettimeofday().truncated_seconds_since_epoch();
        // Not a bug!
        buf = { now, now };
    }
    TRY(VirtualFileSystem::utime(vfs_root_context(), credentials(), path->view(), current_directory(), buf.actime, buf.modtime));
    return 0;
}

}