func()

in psnotify/psnotify_linux.go [154:196]

• 36 lines of code
• 8 McCabe index (conditional complexity)

func (w *Watcher) handleEvent(data []byte) {
	buf := bytes.NewBuffer(data)
	msg := &cnMsg{}
	hdr := &procEventHeader{}

	binary.Read(buf, byteOrder, msg)
	binary.Read(buf, byteOrder, hdr)

	switch hdr.What {
	case PROC_EVENT_FORK:
		event := &forkProcEvent{}
		binary.Read(buf, byteOrder, event)
		ppid := int(event.ParentTgid)
		pid := int(event.ChildTgid)

		if w.isWatching(ppid, PROC_EVENT_EXEC) {
			// follow forks
			watch, _ := w.watches[ppid]
			w.Watch(pid, watch.flags)
		}

		if w.isWatching(ppid, PROC_EVENT_FORK) {
			w.Fork <- &ProcEventFork{ParentPid: ppid, ChildPid: pid}
		}
	case PROC_EVENT_EXEC:
		event := &execProcEvent{}
		binary.Read(buf, byteOrder, event)
		pid := int(event.ProcessTgid)

		if w.isWatching(pid, PROC_EVENT_EXEC) {
			w.Exec <- &ProcEventExec{Pid: pid}
		}
	case PROC_EVENT_EXIT:
		event := &exitProcEvent{}
		binary.Read(buf, byteOrder, event)
		pid := int(event.ProcessTgid)

		if w.isWatching(pid, PROC_EVENT_EXIT) {
			w.RemoveWatch(pid)
			w.Exit <- &ProcEventExit{Pid: pid}
		}
	}
}