[internal/hcs] Migrate package from HCS V1 to V2

.golangci.yml

@@ -124,10 +124,6 @@ linters:
           - staticcheck
         path: internal/winapi/
         text: "ST1003:"
-      - linters:
-          - staticcheck
-        path: internal/vmcompute/
-        text: "ST1003:"
       - linters:
           - staticcheck
         path: internal/regstate/

internal/gcs/process.go

@@ -187,7 +187,10 @@ func (p *Process) ExitCode() (_ int, err error) {
 		return -1, errors.New("process not exited")
 	}
 	if err := p.waitCall.Err(); err != nil {
-		return -1, err
+		var rerr *rpcError
+		if !errors.As(err, &rerr) || uint32(rerr.result) != hrNotFound {
+			return -1, err
+		}
 	}
 	return int(p.waitResp.ExitCode), nil
 }
@@ -274,7 +277,8 @@ func (p *Process) Stdio() (stdin io.Writer, stdout, stderr io.Reader) {
 // Wait waits for the process (or guest connection) to terminate.
 func (p *Process) Wait() error {
 	p.waitCall.Wait()
-	return p.waitCall.Err()
+	_, err := p.ExitCode()
+	return err
 }
 
 func (p *Process) waitBackground() {