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serenity/Kernel/FileSystem/SysFS/Subsystems/Kernel/Log.cpp
Liav A a91589c09b Kernel: Introduce global variables and stats in /sys/kernel directory
The ProcFS is an utter mess currently, so let's start move things that
are not related to processes-info. To ensure it's done in a sane manner,
we start by duplicating all /proc/ global nodes to the /sys/kernel/
directory, then we will move Userland to use the new directory so the
old directory nodes can be removed from the /proc directory.
2022-10-25 15:33:34 -06:00

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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Devices/ConsoleDevice.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Kernel/Log.h>
#include <Kernel/Sections.h>
namespace Kernel {
UNMAP_AFTER_INIT SysFSKernelLog::SysFSKernelLog(SysFSDirectory const& parent_directory)
: SysFSGlobalInformation(parent_directory)
{
}
UNMAP_AFTER_INIT NonnullLockRefPtr<SysFSKernelLog> SysFSKernelLog::must_create(SysFSDirectory const& parent_directory)
{
return adopt_lock_ref_if_nonnull(new (nothrow) SysFSKernelLog(parent_directory)).release_nonnull();
}
mode_t SysFSKernelLog::permissions() const
{
return S_IRUSR;
}
ErrorOr<void> SysFSKernelLog::try_generate(KBufferBuilder& builder)
{
VERIFY(DeviceManagement::the().is_console_device_attached());
SpinlockLocker lock(g_console_lock);
for (char ch : DeviceManagement::the().console_device().logbuffer()) {
TRY(builder.append(ch));
}
return {};
}
}