// runProcess will create a new process in the specified container
// by executing the process specified in the 'config'.
func runProcess(container libcontainer.Container, config *specs.Process, listenFDs []*os.File, console string, pidFile string, detach bool) (int, error) {
process := newProcess(*config)
// Add extra file descriptors if needed
if len(listenFDs) > 0 {
process.Env = append(process.Env, fmt.Sprintf("LISTEN_FDS=%d", len(listenFDs)), "LISTEN_PID=1")
process.ExtraFiles = append(process.ExtraFiles, listenFDs...)
}
rootuid, err := container.Config().HostUID()
if err != nil {
return -1, err
}
tty, err := setupIO(process, rootuid, console, config.Terminal, detach)
if err != nil {
return -1, err
}
handler := newSignalHandler(tty)
defer handler.Close()
if err := container.Start(process); err != nil {
if tty != nil {
tty.Close()
}
return -1, err
}
if pidFile != "" {
if err := createPidFile(pidFile, process); err != nil {
process.Signal(syscall.SIGKILL)
process.Wait()
if tty != nil {
tty.Close()
}
return -1, err
}
}
if detach {
return 0, nil
}
return handler.forward(process)
}
