internal/kobject: process uevent

This tracks kernel state by merging a stream of uevent. Inconsistencies are reported and recovered from gracefully.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/kobject/event.go

@@ -2,6 +2,7 @@ package kobject
 
 import (
 	"errors"
+	"maps"
 	"strconv"
 	"strings"
 	"unsafe"
@@ -28,6 +29,22 @@ type Event struct {
 	Subsystem string `json:"subsystem"`
 }
 
+// Clone returns a copy of e.
+func (e *Event) Clone() Event {
+	v := *e
+	v.Env = maps.Clone(e.Env)
+	return v
+}
+
+// makeColdboot allocates a new [Object] from e in [StateColdboot].
+func (e *Event) makeColdboot() *Object {
+	return &Object{
+		State:     StateColdboot,
+		DevPath:   e.DevPath,
+		Subsystem: e.Subsystem,
+	}
+}
+
 // Populate populates e with the contents of a [uevent.Message].
 //
 // The ACTION and DEVPATH environment variables are ignored and assumed to be