967497097a
Use the state pattern to handle process transitions from one state to another and what actions can be performed on a process in a specific state. Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
// +build !windows
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package shim
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import (
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"context"
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"io"
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"time"
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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 stdio struct {
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stdin string
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stdout string
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stderr string
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terminal bool
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}
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func (s stdio) isNull() bool {
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return s.stdin == "" && s.stdout == "" && s.stderr == ""
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}
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type process interface {
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processState
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// ID returns the id for the process
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ID() string
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// Pid returns the pid for the process
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Pid() int
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// ExitStatus returns the exit status
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ExitStatus() int
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// ExitedAt is the time the process exited
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ExitedAt() time.Time
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// Stdin returns the process STDIN
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Stdin() io.Closer
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// Stdio returns io information for the container
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Stdio() stdio
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// Status returns the process status
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Status(ctx context.Context) (string, error)
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}
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type processState interface {
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// Resize resizes the process console
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Resize(ws console.WinSize) error
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// Start execution of the process
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Start(context.Context) error
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// Delete deletes the process and its resourcess
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Delete(context.Context) error
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// Kill kills the process
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Kill(context.Context, uint32, bool) error
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// SetExited sets the exit status for the process
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SetExited(status int)
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}
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func stateName(v interface{}) string {
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switch v.(type) {
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case *runningState, *execRunningState:
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return "running"
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case *createdState, *execCreatedState:
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return "created"
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case *pausedState:
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return "paused"
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case *deletedState:
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return "deleted"
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case *stoppedState:
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return "stopped"
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}
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panic(errors.Errorf("invalid state %v", v))
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}
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