mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 23:50:19 +00:00
28 lines
810 B
C++
28 lines
810 B
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/FileSystem/OpenFileDescription.h>
|
|
#include <Kernel/Process.h>
|
|
|
|
namespace Kernel {
|
|
|
|
// NOTE: The length is passed by pointer because off_t is 64bit,
|
|
// hence it can't be passed by register on 32bit platforms.
|
|
ErrorOr<FlatPtr> Process::sys$ftruncate(int fd, Userspace<off_t const*> userspace_length)
|
|
{
|
|
VERIFY_NO_PROCESS_BIG_LOCK(this);
|
|
TRY(require_promise(Pledge::stdio));
|
|
auto length = TRY(copy_typed_from_user(userspace_length));
|
|
if (length < 0)
|
|
return EINVAL;
|
|
auto description = TRY(open_file_description(fd));
|
|
if (!description->is_writable())
|
|
return EBADF;
|
|
TRY(description->truncate(static_cast<u64>(length)));
|
|
return 0;
|
|
}
|
|
|
|
}
|