Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 44 insertions, 0 deletions

diff --git a/pkg/sentry/fs/tty/terminal.go b/pkg/sentry/fs/tty/terminal.go
new file mode 100644
index 000000000..6ae713a32
--- /dev/null
+++ b/pkg/sentry/fs/tty/terminal.go
@@ -0,0 +1,44 @@
+// Copyright 2018 Google Inc.
+//
+// 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 tty
+
+import (
+	"gvisor.googlesource.com/gvisor/pkg/abi/linux"
+	"gvisor.googlesource.com/gvisor/pkg/refs"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/context"
+)
+
+// Terminal is a pseudoterminal.
+type Terminal struct {
+	refs.AtomicRefCount
+
+	// n is the terminal index.
+	n uint32
+
+	// d is the containing directory.
+	d *dirInodeOperations
+
+	// ld is the line discipline of the terminal.
+	ld lineDiscipline
+}
+
+func newTerminal(ctx context.Context, d *dirInodeOperations, n uint32) *Terminal {
+	termios := linux.DefaultSlaveTermios
+	return &Terminal{
+		d:  d,
+		n:  n,
+		ld: lineDiscipline{termios: termios},
+	}
+}