// startContainer starts the container. Returns the exit status or -1 and an
// error.
//
// Signals sent to the current process will be forwarded to container.
func startContainer(container *libcontainer.Config, term namespaces.Terminal, dataPath string, args []string) (int, error) {
var (
cmd *exec.Cmd
sigc = make(chan os.Signal, 10)
)
signal.Notify(sigc)
createCommand := func(container *libcontainer.Config, console, rootfs, dataPath, init string, pipe *os.File, args []string) *exec.Cmd {
cmd = namespaces.DefaultCreateCommand(container, console, rootfs, dataPath, init, pipe, args)
if logPath != "" {
cmd.Env = append(cmd.Env, fmt.Sprintf("log=%s", logPath))
}
return cmd
}
startCallback := func() {
go func() {
for sig := range sigc {
cmd.Process.Signal(sig)
}
}()
}
return namespaces.Exec(container, term, "", dataPath, args, createCommand, startCallback)
}
// start a long-running container so we have time to inspect execin processes
func startLongRunningContainer(config *libcontainer.Config) (*exec.Cmd, string, chan error) {
containerErr := make(chan error, 1)
containerCmd := &exec.Cmd{}
var statePath string
createCmd := func(container *libcontainer.Config, console, dataPath, init string,
pipe *os.File, args []string) *exec.Cmd {
containerCmd = namespaces.DefaultCreateCommand(container, console, dataPath, init, pipe, args)
statePath = dataPath
return containerCmd
}
var containerStart sync.WaitGroup
containerStart.Add(1)
go func() {
buffers := newStdBuffers()
_, err := namespaces.Exec(config,
buffers.Stdin, buffers.Stdout, buffers.Stderr,
"", config.RootFs, []string{"sleep", "10"},
createCmd, containerStart.Done)
containerErr <- err
}()
containerStart.Wait()
return containerCmd, statePath, containerErr
}
// startContainer starts the container. Returns the exit status or -1 and an
// error.
//
// Signals sent to the current process will be forwarded to container.
func startContainer(container *libcontainer.Config, dataPath string, args []string) (int, error) {
var (
cmd *exec.Cmd
sigc = make(chan os.Signal, 10)
)
signal.Notify(sigc)
createCommand := func(container *libcontainer.Config, console, rootfs, dataPath, init string, pipe *os.File, args []string) *exec.Cmd {
cmd = namespaces.DefaultCreateCommand(container, console, rootfs, dataPath, init, pipe, args)
if logPath != "" {
cmd.Env = append(cmd.Env, fmt.Sprintf("log=%s", logPath))
}
return cmd
}
var (
master *os.File
console string
err error
stdin = os.Stdin
stdout = os.Stdout
stderr = os.Stderr
)
if container.Tty {
stdin = nil
stdout = nil
stderr = nil
master, console, err = consolepkg.CreateMasterAndConsole()
if err != nil {
return -1, err
}
go io.Copy(master, os.Stdin)
go io.Copy(os.Stdout, master)
state, err := term.SetRawTerminal(os.Stdin.Fd())
if err != nil {
return -1, err
}
defer term.RestoreTerminal(os.Stdin.Fd(), state)
}
startCallback := func() {
go func() {
resizeTty(master)
for sig := range sigc {
switch sig {
case syscall.SIGWINCH:
resizeTty(master)
default:
cmd.Process.Signal(sig)
}
}
}()
}
return namespaces.Exec(container, stdin, stdout, stderr, console, "", dataPath, args, createCommand, startCallback)
}