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50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Memory/MemoryManager.h>
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#include <Kernel/Tasks/Process.h>
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#include <Kernel/Time/TimeManagement.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$sysconf(int name)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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switch (name) {
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case _SC_MONOTONIC_CLOCK:
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return 1;
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case _SC_NPROCESSORS_CONF:
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case _SC_NPROCESSORS_ONLN:
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return Processor::count();
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case _SC_OPEN_MAX:
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return OpenFileDescriptions::max_open();
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case _SC_PAGESIZE:
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return PAGE_SIZE;
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case _SC_HOST_NAME_MAX:
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return HOST_NAME_MAX;
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case _SC_TTY_NAME_MAX:
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return TTY_NAME_MAX;
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case _SC_GETPW_R_SIZE_MAX:
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case _SC_GETGR_R_SIZE_MAX:
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return 4096; // idk
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case _SC_CLK_TCK:
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return TimeManagement::the().ticks_per_second();
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case _SC_SYMLOOP_MAX:
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return Kernel::VirtualFileSystem::symlink_recursion_limit;
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case _SC_ARG_MAX:
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return Process::max_arguments_size;
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case _SC_IOV_MAX:
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return IOV_MAX;
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case _SC_PHYS_PAGES:
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return MM.get_system_memory_info().physical_pages;
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default:
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return EINVAL;
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}
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}
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}
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