1 files changed, 94 insertions, 0 deletions
diff --git a/tools/debugserver/source/PseudoTerminal.h b/tools/debugserver/source/PseudoTerminal.h
new file mode 100644
index 000000000000..da6b79307b9c
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+++ b/tools/debugserver/source/PseudoTerminal.h
@@ -0,0 +1,94 @@
+//===-- PseudoTerminal.h ----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  Created by Greg Clayton on 1/8/08.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __PseudoTerminal_h__
+#define __PseudoTerminal_h__
+
+#include <fcntl.h>
+#include <termios.h>
+#include <string>
+
+class PseudoTerminal
+{
+public:
+    enum {
+        invalid_fd = -1,
+        invalid_pid = -1
+    };
+
+    enum Error
+    {
+        success                                     = 0,
+        err_posix_openpt_failed                     = -2,
+        err_grantpt_failed                          = -3,
+        err_unlockpt_failed                         = -4,
+        err_ptsname_failed                          = -5,
+        err_open_slave_failed                       = -6,
+        err_fork_failed                             = -7,
+        err_setsid_failed                           = -8,
+        err_failed_to_acquire_controlling_terminal  = -9,
+        err_dup2_failed_on_stdin                    = -10,
+        err_dup2_failed_on_stdout                   = -11,
+        err_dup2_failed_on_stderr                   = -12
+    };
+    //------------------------------------------------------------------
+    // Constructors and Destructors
+    //------------------------------------------------------------------
+                PseudoTerminal ();
+                ~PseudoTerminal ();
+
+    void        CloseMaster ();
+    void        CloseSlave ();
+    Error       OpenFirstAvailableMaster (int oflag);
+    Error       OpenSlave (int oflag);
+    int         MasterFD () const { return m_master_fd; }
+    int         SlaveFD () const { return m_slave_fd; }
+    int         ReleaseMasterFD ()
+                {
+                    // Release ownership of the master pseudo terminal file
+                    // descriptor without closing it. (the destructor for this
+                    // class will close it otherwise!)
+                    int fd = m_master_fd;
+                    m_master_fd = invalid_fd;
+                    return fd;
+                }
+    int         ReleaseSlaveFD ()
+                {
+                    // Release ownership of the slave pseudo terminal file
+                    // descriptor without closing it (the destructor for this
+                    // class will close it otherwise!)
+                    int fd = m_slave_fd;
+                    m_slave_fd = invalid_fd;
+                    return fd;
+                }
+
+    const char* SlaveName () const;
+
+    pid_t       Fork(Error& error);
+protected:
+    //------------------------------------------------------------------
+    // Classes that inherit from PseudoTerminal can see and modify these
+    //------------------------------------------------------------------
+    int m_master_fd;
+    int m_slave_fd;
+
+private:
+    //------------------------------------------------------------------
+    // Outlaw copy and assignment constructors
+    //------------------------------------------------------------------
+    PseudoTerminal(const PseudoTerminal& rhs);
+    PseudoTerminal& operator=(const PseudoTerminal& rhs);
+
+};
+
+#endif // #ifndef __PseudoTerminal_h__