// Re-exec this image without dropping the listener passed to this function.
func restart(listener net.Listener, errLogger *common.ErrorLogger) error {
argv0, err := exec.LookPath(os.Args[0])
if nil != err {
return err
}
wd, err := os.Getwd()
if nil != err {
return err
}
v := reflect.ValueOf(listener).Elem().FieldByName("fd").Elem()
fd := uintptr(v.FieldByName("sysfd").Int())
allFiles := append([]*os.File{os.Stdin, os.Stdout, os.Stderr},
os.NewFile(fd, string(v.FieldByName("sysfile").String())))
p, err := os.StartProcess(argv0, os.Args, &os.ProcAttr{
Dir: wd,
Env: append(os.Environ(), fmt.Sprintf("%s=%d", FDKey, fd)),
Files: allFiles,
})
if nil != err {
return err
}
errLogger.Printf("spawned child %d\n", p.Pid)
return nil
}
