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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2017-2022 Bartosz Golaszewski <brgl@bgdev.pl>
#include <linux/version.h>
#include <sys/utsname.h>
#include <system_error>
#include <sstream>
namespace {
class kernel_checker
{
public:
kernel_checker(int major, int minor, int release)
{
int curr_major, curr_minor, curr_release, curr_ver, req_ver;
::std::string major_str, minor_str, release_str;
::utsname un;
int ret;
ret = ::uname(::std::addressof(un));
if (ret)
throw ::std::system_error(errno, ::std::system_category(),
"unable to read the kernel version");
::std::stringstream ver_stream(::std::string(un.release));
::std::getline(ver_stream, major_str, '.');
::std::getline(ver_stream, minor_str, '.');
::std::getline(ver_stream, release_str, '-');
curr_major = ::std::stoi(major_str, nullptr, 0);
curr_minor = ::std::stoi(minor_str, nullptr, 0);
curr_release = ::std::stoi(release_str, nullptr, 0);
curr_ver = KERNEL_VERSION(curr_major, curr_minor, curr_release);
req_ver = KERNEL_VERSION(major, minor, release);
if (curr_ver < req_ver)
throw ::std::runtime_error("kernel release must be at least: " +
::std::to_string(major) + "." +
::std::to_string(minor) + "." +
::std::to_string(release));
}
};
kernel_checker require_kernel(5, 19, 0);
} /* namespace */
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