# Copyright (C) 2024 Web Server LLC
# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


if check_cache "kernel version" "os"; then
    return
fi

# Linux kernel version

version=$((`uname -r \
    | sed -n -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/ \
                                                 \1*256*256+\2*256+\3/p' \
             -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/\1*256*256+\2*256/p'`))

version=${version:-0}

if [ $NGX_FEATURE_CACHE = NO ]; then
    return
fi

cache_output_start

echo "ngx_found=yes"
echo "version=\"$version\""

cache_output_end