separate proc interfaces into standalone package

Signed-off-by: Evan Hazlett <ejhazlett@gmail.com>

runtime/linux/proc/process.go

@@ -19,66 +19,12 @@
 package proc
 
 import (
-	"context"
-	"io"
-	"sync"
-	"time"
-
-	"github.com/containerd/console"
 	"github.com/pkg/errors"
 )
 
 // RuncRoot is the path to the root runc state directory
 const RuncRoot = "/run/containerd/runc"
 
-// Stdio of a process
-type Stdio struct {
-	Stdin    string
-	Stdout   string
-	Stderr   string
-	Terminal bool
-}
-
-// IsNull returns true if the stdio is not defined
-func (s Stdio) IsNull() bool {
-	return s.Stdin == "" && s.Stdout == "" && s.Stderr == ""
-}
-
-// Process on a linux system
-type Process interface {
-	State
-	// ID returns the id for the process
-	ID() string
-	// Pid returns the pid for the process
-	Pid() int
-	// ExitStatus returns the exit status
-	ExitStatus() int
-	// ExitedAt is the time the process exited
-	ExitedAt() time.Time
-	// Stdin returns the process STDIN
-	Stdin() io.Closer
-	// Stdio returns io information for the container
-	Stdio() Stdio
-	// Status returns the process status
-	Status(context.Context) (string, error)
-	// Wait blocks until the process has exited
-	Wait()
-}
-
-// State of a process
-type State interface {
-	// Resize resizes the process console
-	Resize(ws console.WinSize) error
-	// Start execution of the process
-	Start(context.Context) error
-	// Delete deletes the process and its resourcess
-	Delete(context.Context) error
-	// Kill kills the process
-	Kill(context.Context, uint32, bool) error
-	// SetExited sets the exit status for the process
-	SetExited(status int)
-}
-
 func stateName(v interface{}) string {
 	switch v.(type) {
 	case *runningState, *execRunningState:
@@ -94,12 +40,3 @@ func stateName(v interface{}) string {
 	}
 	panic(errors.Errorf("invalid state %v", v))
 }
-
-// Platform handles platform-specific behavior that may differs across
-// platform implementations
-type Platform interface {
-	CopyConsole(ctx context.Context, console console.Console, stdin, stdout, stderr string,
-		wg, cwg *sync.WaitGroup) (console.Console, error)
-	ShutdownConsole(ctx context.Context, console console.Console) error
-	Close() error
-}