mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 20:32:44 +00:00
7c87891c06
Instead of copying a Vector everytime we need to enumerate a Process' file descriptions, we can just temporarily lock so it won't change.
30 lines
854 B
C++
30 lines
854 B
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/FileSystem/FileDescription.h>
|
|
#include <Kernel/Process.h>
|
|
|
|
namespace Kernel {
|
|
|
|
KResultOr<FlatPtr> Process::sys$get_dir_entries(int fd, Userspace<void*> user_buffer, size_t user_size)
|
|
{
|
|
REQUIRE_PROMISE(stdio);
|
|
if (user_size > NumericLimits<ssize_t>::max())
|
|
return EINVAL;
|
|
auto description = fds().file_description(fd);
|
|
if (!description)
|
|
return EBADF;
|
|
auto buffer = UserOrKernelBuffer::for_user_buffer(user_buffer, static_cast<size_t>(user_size));
|
|
if (!buffer.has_value())
|
|
return EFAULT;
|
|
auto result = description->get_dir_entries(buffer.value(), user_size);
|
|
if (result.is_error())
|
|
return result.error();
|
|
else
|
|
return result.release_value();
|
|
}
|
|
|
|
}
|