Updating dependency github.com/containerd/console to version v0.0.0-20180822173158-c12b1e7919c1

vendor/github.com/containerd/console/tc_openbsd_cgo.go

@@ -0,0 +1,51 @@
+// +build openbsd,cgo
+
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package console
+
+import (
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+//#include <stdlib.h>
+import "C"
+
+const (
+	cmdTcGet = unix.TIOCGETA
+	cmdTcSet = unix.TIOCSETA
+)
+
+// ptsname retrieves the name of the first available pts for the given master.
+func ptsname(f *os.File) (string, error) {
+	ptspath, err := C.ptsname(C.int(f.Fd()))
+	if err != nil {
+		return "", err
+	}
+	return C.GoString(ptspath), nil
+}
+
+// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
+// unlockpt should be called before opening the slave side of a pty.
+func unlockpt(f *os.File) error {
+	if _, err := C.grantpt(C.int(f.Fd())); err != nil {
+		return err
+	}
+	return nil
+}