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| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // Created by Greg Clayton on 3/26/07. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #ifndef LLDB_TOOLS_DEBUGSERVER_SOURCE_TTYSTATE_H |
| 14 | #define LLDB_TOOLS_DEBUGSERVER_SOURCE_TTYSTATE_H |
| 15 | |
| 16 | #include <cstdint> |
| 17 | #include <termios.h> |
| 18 | |
| 19 | class TTYState { |
| 20 | public: |
| 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 | |
| 35 | protected: |
| 36 | int m_fd; // File descriptor |
| 37 | int m_tflags; |
| 38 | int m_ttystateErr; |
| 39 | struct termios m_ttystate; |
| 40 | pid_t m_processGroup; |
| 41 | }; |
| 42 | |
| 43 | class TTYStateSwitcher { |
| 44 | public: |
| 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 | |
| 53 | protected: |
| 54 | mutable uint32_t m_currentState; |
| 55 | TTYState m_ttystates[2]; |
| 56 | }; |
| 57 | |
| 58 | #endif |
| 59 |
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