// Copyright 2018 The gVisor 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 tty

import (
	"gvisor.dev/gvisor/pkg/abi/linux"
	"gvisor.dev/gvisor/pkg/refs"
	"gvisor.dev/gvisor/pkg/sentry/context"
)

// Terminal is a pseudoterminal.
//
// +stateify savable
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: newLineDiscipline(termios),
	}
}