173 lines
3.4 KiB
Go
173 lines
3.4 KiB
Go
// +build !windows
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package proc
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import (
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"context"
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"github.com/containerd/console"
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"github.com/pkg/errors"
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)
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type execCreatedState struct {
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p *execProcess
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}
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func (s *execCreatedState) transition(name string) error {
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switch name {
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case "running":
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s.p.State = &execRunningState{p: s.p}
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case "stopped":
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s.p.State = &execStoppedState{p: s.p}
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case "deleted":
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s.p.State = &deletedState{}
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default:
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return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
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}
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return nil
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}
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func (s *execCreatedState) Resize(ws console.WinSize) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return s.p.resize(ws)
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}
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func (s *execCreatedState) Start(ctx context.Context) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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if err := s.p.start(ctx); err != nil {
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return err
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}
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return s.transition("running")
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}
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func (s *execCreatedState) Delete(ctx context.Context) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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if err := s.p.delete(ctx); err != nil {
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return err
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}
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return s.transition("deleted")
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}
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func (s *execCreatedState) Kill(ctx context.Context, sig uint32, all bool) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return s.p.kill(ctx, sig, all)
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}
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func (s *execCreatedState) SetExited(status int) {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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s.p.setExited(status)
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if err := s.transition("stopped"); err != nil {
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panic(err)
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}
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}
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type execRunningState struct {
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p *execProcess
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}
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func (s *execRunningState) transition(name string) error {
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switch name {
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case "stopped":
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s.p.State = &execStoppedState{p: s.p}
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default:
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return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
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}
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return nil
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}
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func (s *execRunningState) Resize(ws console.WinSize) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return s.p.resize(ws)
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}
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func (s *execRunningState) Start(ctx context.Context) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return errors.Errorf("cannot start a running process")
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}
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func (s *execRunningState) Delete(ctx context.Context) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return errors.Errorf("cannot delete a running process")
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}
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func (s *execRunningState) Kill(ctx context.Context, sig uint32, all bool) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return s.p.kill(ctx, sig, all)
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}
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func (s *execRunningState) SetExited(status int) {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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s.p.setExited(status)
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if err := s.transition("stopped"); err != nil {
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panic(err)
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}
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}
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type execStoppedState struct {
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p *execProcess
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}
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func (s *execStoppedState) transition(name string) error {
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switch name {
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case "deleted":
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s.p.State = &deletedState{}
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default:
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return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
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}
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return nil
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}
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func (s *execStoppedState) Resize(ws console.WinSize) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return errors.Errorf("cannot resize a stopped container")
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}
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func (s *execStoppedState) Start(ctx context.Context) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return errors.Errorf("cannot start a stopped process")
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}
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func (s *execStoppedState) Delete(ctx context.Context) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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if err := s.p.delete(ctx); err != nil {
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return err
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}
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return s.transition("deleted")
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}
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func (s *execStoppedState) Kill(ctx context.Context, sig uint32, all bool) error {
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s.p.mu.Lock()
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defer s.p.mu.Unlock()
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return s.p.kill(ctx, sig, all)
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}
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func (s *execStoppedState) SetExited(status int) {
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// no op
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}
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