72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
/*
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* Copyright 2020-2022 CM4all GmbH
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* All rights reserved.
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*
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* author: Max Kellermann <mk@cm4all.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "KernelVersion.hxx"
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#include <sys/utsname.h>
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#include <stdio.h>
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[[gnu::const]]
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static KernelVersionCode
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GetKernelVersionCode() noexcept
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{
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struct utsname u;
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if (uname(&u) != 0)
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return {};
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unsigned major, minor, patch;
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switch (sscanf(u.release, "%u.%u.%u", &major, &minor, &patch)) {
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case 1:
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minor = patch = 0;
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break;
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case 2:
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patch = 0;
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break;
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case 3:
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break;
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default:
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return {};
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}
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return {major, minor, patch};
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}
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bool
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IsKernelVersionOrNewer(KernelVersionCode v) noexcept
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{
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static const auto kernel_version_code = GetKernelVersionCode();
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return kernel_version_code >= v;
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}
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