1 //===-- PseudoTerminal.h ----------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Created by Greg Clayton on 1/8/08. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef __PseudoTerminal_h__ 15 #define __PseudoTerminal_h__ 16 17 #include <fcntl.h> 18 #include <termios.h> 19 #include <string> 20 21 class PseudoTerminal 22 { 23 public: 24 enum { 25 invalid_fd = -1, 26 invalid_pid = -1 27 }; 28 29 enum Error 30 { 31 success = 0, 32 err_posix_openpt_failed = -2, 33 err_grantpt_failed = -3, 34 err_unlockpt_failed = -4, 35 err_ptsname_failed = -5, 36 err_open_slave_failed = -6, 37 err_fork_failed = -7, 38 err_setsid_failed = -8, 39 err_failed_to_acquire_controlling_terminal = -9, 40 err_dup2_failed_on_stdin = -10, 41 err_dup2_failed_on_stdout = -11, 42 err_dup2_failed_on_stderr = -12 43 }; 44 //------------------------------------------------------------------ 45 // Constructors and Destructors 46 //------------------------------------------------------------------ 47 PseudoTerminal (); 48 ~PseudoTerminal (); 49 50 void CloseMaster (); 51 void CloseSlave (); 52 Error OpenFirstAvailableMaster (int oflag); 53 Error OpenSlave (int oflag); 54 int MasterFD () const { return m_master_fd; } 55 int SlaveFD () const { return m_slave_fd; } 56 int ReleaseMasterFD () 57 { 58 // Release ownership of the master pseudo terminal file 59 // descriptor without closing it. (the destructor for this 60 // class will close it otherwise!) 61 int fd = m_master_fd; 62 m_master_fd = invalid_fd; 63 return fd; 64 } 65 int ReleaseSlaveFD () 66 { 67 // Release ownership of the slave pseudo terminal file 68 // descriptor without closing it (the destructor for this 69 // class will close it otherwise!) 70 int fd = m_slave_fd; 71 m_slave_fd = invalid_fd; 72 return fd; 73 } 74 75 const char* SlaveName () const; 76 77 pid_t Fork(Error& error); 78 protected: 79 //------------------------------------------------------------------ 80 // Classes that inherit from PseudoTerminal can see and modify these 81 //------------------------------------------------------------------ 82 int m_master_fd; 83 int m_slave_fd; 84 85 private: 86 //------------------------------------------------------------------ 87 // Outlaw copy and assignment constructors 88 //------------------------------------------------------------------ 89 PseudoTerminal(const PseudoTerminal& rhs); 90 PseudoTerminal& operator=(const PseudoTerminal& rhs); 91 92 }; 93 94 #endif // #ifndef __PseudoTerminal_h__ 95
