Windows: Impl pkg\parsers kernel+os

Signed-off-by: John Howard <jhoward@microsoft.com>

parsers/operatingsystem/operatingsystem_linux.go

@@ -0,0 +1,40 @@
+package operatingsystem
+
+import (
+	"bytes"
+	"errors"
+	"io/ioutil"
+)
+
+var (
+	// file to use to detect if the daemon is running in a container
+	proc1Cgroup = "/proc/1/cgroup"
+
+	// file to check to determine Operating System
+	etcOsRelease = "/etc/os-release"
+)
+
+func GetOperatingSystem() (string, error) {
+	b, err := ioutil.ReadFile(etcOsRelease)
+	if err != nil {
+		return "", err
+	}
+	if i := bytes.Index(b, []byte("PRETTY_NAME")); i >= 0 {
+		b = b[i+13:]
+		return string(b[:bytes.IndexByte(b, '"')]), nil
+	}
+	return "", errors.New("PRETTY_NAME not found")
+}
+
+func IsContainerized() (bool, error) {
+	b, err := ioutil.ReadFile(proc1Cgroup)
+	if err != nil {
+		return false, err
+	}
+	for _, line := range bytes.Split(b, []byte{'\n'}) {
+		if len(line) > 0 && !bytes.HasSuffix(line, []byte{'/'}) {
+			return true, nil
+		}
+	}
+	return false, nil
+}