mirror of
https://github.com/opencontainers/runc.git
synced 2026-07-11 06:03:57 +08:00
Andrey Vagin
b836046422
criu swrk is a special mode when we don't want to execute a service, but want to use RPC. Here is more details: http://lists.openvz.org/pipermail/criu/2015-March/019400.html Another good feature of this mode is that we don't need to create action scripts and we will be able to remove the hack with saving StdFds. criu swrk is supported starting with CRIU 1.5.1. Signed-off-by: Andrey Vagin <avagin@openvz.org>
100 lines
2.2 KiB
Go
100 lines
2.2 KiB
Go
// +build linux
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package libcontainer
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import (
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"fmt"
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"os"
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"github.com/docker/libcontainer/system"
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)
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func newRestoredProcess(pid int) (*restoredProcess, error) {
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var (
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err error
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)
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proc, err := os.FindProcess(pid)
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if err != nil {
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return nil, err
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}
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started, err := system.GetProcessStartTime(pid)
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if err != nil {
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return nil, err
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}
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return &restoredProcess{
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proc: proc,
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processStartTime: started,
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}, nil
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}
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type restoredProcess struct {
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proc *os.Process
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processStartTime string
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}
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func (p *restoredProcess) start() error {
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return newGenericError(fmt.Errorf("restored process cannot be started"), SystemError)
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}
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func (p *restoredProcess) pid() int {
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return p.proc.Pid
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}
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func (p *restoredProcess) terminate() error {
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err := p.proc.Kill()
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if _, werr := p.wait(); err == nil {
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err = werr
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}
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return err
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}
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func (p *restoredProcess) wait() (*os.ProcessState, error) {
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// TODO: how do we wait on the actual process?
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// maybe use --exec-cmd in criu
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st, err := p.proc.Wait()
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if err != nil {
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return nil, err
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}
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return st, nil
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}
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func (p *restoredProcess) startTime() (string, error) {
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return p.processStartTime, nil
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}
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func (p *restoredProcess) signal(s os.Signal) error {
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return p.proc.Signal(s)
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}
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// nonChildProcess represents a process where the calling process is not
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// the parent process. This process is created when a factory loads a container from
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// a persisted state.
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type nonChildProcess struct {
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processPid int
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processStartTime string
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}
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func (p *nonChildProcess) start() error {
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return newGenericError(fmt.Errorf("restored process cannot be started"), SystemError)
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}
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func (p *nonChildProcess) pid() int {
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return p.processPid
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}
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func (p *nonChildProcess) terminate() error {
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return newGenericError(fmt.Errorf("restored process cannot be terminated"), SystemError)
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}
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func (p *nonChildProcess) wait() (*os.ProcessState, error) {
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return nil, newGenericError(fmt.Errorf("restored process cannot be waited on"), SystemError)
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}
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func (p *nonChildProcess) startTime() (string, error) {
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return p.processStartTime, nil
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}
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func (p *nonChildProcess) signal(s os.Signal) error {
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return newGenericError(fmt.Errorf("restored process cannot be signaled"), SystemError)
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}
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