59 lines · c
1//===-- TTYState.h ----------------------------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// Created by Greg Clayton on 3/26/07.10//11//===----------------------------------------------------------------------===//12 13#ifndef LLDB_TOOLS_DEBUGSERVER_SOURCE_TTYSTATE_H14#define LLDB_TOOLS_DEBUGSERVER_SOURCE_TTYSTATE_H15 16#include <cstdint>17#include <termios.h>18 19class TTYState {20public:21 TTYState();22 ~TTYState();23 24 bool GetTTYState(int fd, bool saveProcessGroup);25 bool SetTTYState() const;26 27 bool IsValid() const {28 return FileDescriptorValid() && TFlagsValid() && TTYStateValid();29 }30 bool FileDescriptorValid() const { return m_fd >= 0; }31 bool TFlagsValid() const { return m_tflags != -1; }32 bool TTYStateValid() const { return m_ttystateErr == 0; }33 bool ProcessGroupValid() const { return m_processGroup != -1; }34 35protected:36 int m_fd; // File descriptor37 int m_tflags;38 int m_ttystateErr;39 struct termios m_ttystate;40 pid_t m_processGroup;41};42 43class TTYStateSwitcher {44public:45 TTYStateSwitcher();46 ~TTYStateSwitcher();47 48 bool GetState(uint32_t idx, int fd, bool saveProcessGroup);49 bool SetState(uint32_t idx) const;50 uint32_t NumStates() const { return sizeof(m_ttystates) / sizeof(TTYState); }51 bool ValidStateIndex(uint32_t idx) const { return idx < NumStates(); }52 53protected:54 mutable uint32_t m_currentState;55 TTYState m_ttystates[2];56};57 58#endif59