moby/pkg/parsers/kernel/kernel_unix.go

// +build linux freebsd solaris

// Package kernel provides helper function to get, parse and compare kernel
// versions for different platforms.
package kernel

import (
	"bytes"
)

// GetKernelVersion gets the current kernel version.
func GetKernelVersion() (*VersionInfo, error) {
	var (
		err error
	)

	uts, err := uname()
	if err != nil {
		return nil, err
	}

	release := make([]byte, len(uts.Release))

	i := 0
	for _, c := range uts.Release {
		release[i] = byte(c)
		i++
	}

	// Remove the \x00 from the release for Atoi to parse correctly
	release = release[:bytes.IndexByte(release, 0)]

	return ParseRelease(string(release))
}