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//===-- TTYState.h ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Created by Greg Clayton on 3/26/07.
//
//===----------------------------------------------------------------------===//
#ifndef __TTYState_h__
#define __TTYState_h__
#include <stdint.h>
#include <termios.h>
class TTYState {
public:
TTYState();
~TTYState();
bool GetTTYState(int fd, bool saveProcessGroup);
bool SetTTYState() const;
bool IsValid() const {
return FileDescriptorValid() && TFlagsValid() && TTYStateValid();
}
bool FileDescriptorValid() const { return m_fd >= 0; }
bool TFlagsValid() const { return m_tflags != -1; }
bool TTYStateValid() const { return m_ttystateErr == 0; }
bool ProcessGroupValid() const { return m_processGroup != -1; }
protected:
int m_fd; // File descriptor
int m_tflags;
int m_ttystateErr;
struct termios m_ttystate;
pid_t m_processGroup;
};
class TTYStateSwitcher {
public:
TTYStateSwitcher();
~TTYStateSwitcher();
bool GetState(uint32_t idx, int fd, bool saveProcessGroup);
bool SetState(uint32_t idx) const;
uint32_t NumStates() const { return sizeof(m_ttystates) / sizeof(TTYState); }
bool ValidStateIndex(uint32_t idx) const { return idx < NumStates(); }
protected:
mutable uint32_t m_currentState;
TTYState m_ttystates[2];
};
#endif
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