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1//===-- PseudoTerminal.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 1/8/08.10//11//===----------------------------------------------------------------------===//12 13#ifndef LLDB_TOOLS_DEBUGSERVER_SOURCE_PSEUDOTERMINAL_H14#define LLDB_TOOLS_DEBUGSERVER_SOURCE_PSEUDOTERMINAL_H15 16#include <fcntl.h>17#include <string>18#include <termios.h>19 20class PseudoTerminal {21public:22 enum { invalid_fd = -1, invalid_pid = -1 };23 24 enum Status {25 success = 0,26 err_posix_openpt_failed = -2,27 err_grantpt_failed = -3,28 err_unlockpt_failed = -4,29 err_ptsname_failed = -5,30 err_open_secondary_failed = -6,31 err_fork_failed = -7,32 err_setsid_failed = -8,33 err_failed_to_acquire_controlling_terminal = -9,34 err_dup2_failed_on_stdin = -10,35 err_dup2_failed_on_stdout = -11,36 err_dup2_failed_on_stderr = -1237 };38 // Constructors and Destructors39 PseudoTerminal();40 ~PseudoTerminal();41 42 void ClosePrimary();43 void CloseSecondary();44 Status OpenFirstAvailablePrimary(int oflag);45 Status OpenSecondary(int oflag);46 int PrimaryFD() const { return m_primary_fd; }47 int SecondaryFD() const { return m_secondary_fd; }48 int ReleasePrimaryFD() {49 // Release ownership of the primary pseudo terminal file50 // descriptor without closing it. (the destructor for this51 // class will close it otherwise!)52 int fd = m_primary_fd;53 m_primary_fd = invalid_fd;54 return fd;55 }56 int ReleaseSecondaryFD() {57 // Release ownership of the secondary pseudo terminal file58 // descriptor without closing it (the destructor for this59 // class will close it otherwise!)60 int fd = m_secondary_fd;61 m_secondary_fd = invalid_fd;62 return fd;63 }64 65 const char *SecondaryName() const;66 67 pid_t Fork(Status &error);68 69protected:70 // Classes that inherit from PseudoTerminal can see and modify these71 int m_primary_fd;72 int m_secondary_fd;73 74private:75 PseudoTerminal(const PseudoTerminal &rhs) = delete;76 PseudoTerminal &operator=(const PseudoTerminal &rhs) = delete;77};78 79#endif // LLDB_TOOLS_DEBUGSERVER_SOURCE_PSEUDOTERMINAL_H80