123 lines
2.6 KiB
Go
123 lines
2.6 KiB
Go
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// +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/opencontainers/runc/libcontainer/system"
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)
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func newRestoredProcess(pid int, fds []string) (*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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stat, err := system.Stat(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: stat.StartTime,
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fds: fds,
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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 uint64
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fds []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() (uint64, 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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func (p *restoredProcess) externalDescriptors() []string {
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return p.fds
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}
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func (p *restoredProcess) setExternalDescriptors(newFds []string) {
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p.fds = newFds
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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 uint64
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fds []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() (uint64, 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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proc, err := os.FindProcess(p.processPid)
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if err != nil {
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return err
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}
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return proc.Signal(s)
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}
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func (p *nonChildProcess) externalDescriptors() []string {
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return p.fds
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}
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func (p *nonChildProcess) setExternalDescriptors(newFds []string) {
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p.fds = newFds
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}
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