Function fetch_linux_kernel_version

less_slow.cpp:6952–6959

#include <sys/mman.h>    // `mmap`, `munmap`

std::pair<int, int> fetch_linux_kernel_version() {
    struct utsname buffer;
    if (uname(&buffer) < 0) throw std::runtime_error("Failed to fetch Linux kernel version");
    int major = 0, minor = 0;
    // Attempt to parse something like "5.19.0-38-generic" into major=5, minor=19
    std::sscanf(buffer.release, "%d.%d", &major, &minor);
    return {major, minor};
}

/**
 *  @brief  Memory allocator, sharing the same memory region between the kernel and user-space.