forked from OSchip/llvm-project
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
//===-- TTYState.h ----------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Created by Greg Clayton on 3/26/07.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __TTYState_h__
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#define __TTYState_h__
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#include <stdint.h>
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#include <termios.h>
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class TTYState {
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public:
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TTYState();
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~TTYState();
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bool GetTTYState(int fd, bool saveProcessGroup);
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bool SetTTYState() const;
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bool IsValid() const {
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return FileDescriptorValid() && TFlagsValid() && TTYStateValid();
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}
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bool FileDescriptorValid() const { return m_fd >= 0; }
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bool TFlagsValid() const { return m_tflags != -1; }
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bool TTYStateValid() const { return m_ttystateErr == 0; }
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bool ProcessGroupValid() const { return m_processGroup != -1; }
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protected:
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int m_fd; // File descriptor
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int m_tflags;
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int m_ttystateErr;
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struct termios m_ttystate;
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pid_t m_processGroup;
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};
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class TTYStateSwitcher {
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public:
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TTYStateSwitcher();
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~TTYStateSwitcher();
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bool GetState(uint32_t idx, int fd, bool saveProcessGroup);
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bool SetState(uint32_t idx) const;
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uint32_t NumStates() const { return sizeof(m_ttystates) / sizeof(TTYState); }
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bool ValidStateIndex(uint32_t idx) const { return idx < NumStates(); }
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protected:
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mutable uint32_t m_currentState;
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TTYState m_ttystates[2];
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};
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#endif |