[host] added option parsing to application

common/debug.h

@@ -18,11 +18,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 
 #include <stdio.h>
 
-#ifdef DEBUG
-  #define DEBUG_PRINT(type, fmt, ...) do {fprintf(stderr, type " %20s:%-5u | %-24s | " fmt "\n", __FILE__, __LINE__, __FUNCTION__, ##__VA_ARGS__);} while (0)
-#else
-  #define DEBUG_PRINT(type, fmt, ...) do {} while(0)
-#endif
+#define DEBUG_PRINT(type, fmt, ...) do {fprintf(stderr, type " %20s:%-5u | %-24s | " fmt "\n", __FILE__, __LINE__, __FUNCTION__, ##__VA_ARGS__);} while (0)
 
 #define DEBUG_INFO(fmt, ...) DEBUG_PRINT("[I]", fmt, ##__VA_ARGS__)
 #define DEBUG_WARN(fmt, ...) DEBUG_PRINT("[W]", fmt, ##__VA_ARGS__)

host/Capture/DXGI.cpp

@@ -22,6 +22,7 @@ using namespace Capture;
 #include "common\debug.h"
 
 DXGI::DXGI() :
+  m_options(NULL),
   m_initialized(false),
   m_dxgiFactory(NULL),
   m_device(NULL),
@@ -37,11 +38,12 @@ DXGI::~DXGI()
 
 }
 
-bool DXGI::Initialize()
+bool DXGI::Initialize(CaptureOptions * options)
 {
   if (m_initialized)
     DeInitialize();
 
+  m_options = options;
   HRESULT status;
 
   status = CreateDXGIFactory1(__uuidof(IDXGIFactory1), (void **)(&m_dxgiFactory));
@@ -208,7 +210,7 @@ bool DXGI::ReInitialize()
   */
   Sleep(200);
 
-  return Initialize();
+  return Initialize(m_options);
 }
 
 FrameType DXGI::GetFrameType()

host/Capture/DXGI.h

@@ -33,7 +33,10 @@ namespace Capture
   public:
     DXGI();
     ~DXGI();
-    bool Initialize();
+
+    const char * GetName() { return "DXGI"; }
+
+    bool Initialize(CaptureOptions * options);
     void DeInitialize();
     enum FrameType GetFrameType();
     enum FrameComp GetFrameCompression();
@@ -41,6 +44,8 @@ namespace Capture
     bool GrabFrame(struct FrameInfo & frame);
 
   private:
+    CaptureOptions * m_options;
+
     bool ReInitialize();
 
     bool          m_initialized;

host/Capture/NvFBC.cpp

@@ -31,6 +31,8 @@ using namespace Capture;
 #endif
 
 NvFBC::NvFBC() :
+  m_options(NULL),
+  m_optNoCrop(false),
   m_initialized(false),
   m_hDLL(NULL),
   m_nvFBC(NULL)
@@ -41,11 +43,18 @@ NvFBC::~NvFBC()
 {
 }
 
-bool NvFBC::Initialize()
+bool NvFBC::Initialize(CaptureOptions * options)
 {
   if (m_initialized)
     DeInitialize();
 
+  m_options   = options;
+  m_optNoCrop = false;
+  for (CaptureOptions::const_iterator it = options->begin(); it != options->end(); ++it)
+  {
+    if (_strcmpi(*it, "nocrop") == 0) { m_optNoCrop = true; continue; }
+  }
+
   std::string nvfbc = Util::GetSystemRoot() + "\\" + NVFBC_LIBRARY_NAME;
   m_hDLL = LoadLibraryA(nvfbc.c_str());
   if (!m_hDLL)
@@ -221,15 +230,30 @@ bool NvFBC::GrabFrame(struct FrameInfo & frame)
     NVFBCRESULT status = m_nvFBC->NvFBCToSysGrabFrame(&m_grabFrameParams);
     if (status == NVFBC_SUCCESS)
     {
-      const unsigned int realHeight = min(m_grabInfo.dwHeight, desktop.bottom - desktop.top );
-      const unsigned int realWidth  = min(m_grabInfo.dwWidth , desktop.right  - desktop.left);
-      const unsigned int dataWidth  = realWidth * 3;
-      const unsigned int dataOffset =
-        (((m_grabInfo.dwHeight - realHeight) >> 1)  * m_grabInfo.dwBufferWidth +
-        ((m_grabInfo.dwWidth  - realWidth ) >> 1)) * 3;
+      unsigned int dataWidth;
+      unsigned int dataOffset;
+
+      if (m_optNoCrop)
+      {
+        dataWidth  = m_grabInfo.dwWidth * 3;
+        dataOffset = 0;
+
+        frame.width   = m_grabInfo.dwWidth;
+        frame.height  = m_grabInfo.dwHeight;
+      }
+      else
+      {
+        const unsigned int realHeight = min(m_grabInfo.dwHeight, (unsigned int)(desktop.bottom - desktop.top));
+        const unsigned int realWidth  = min(m_grabInfo.dwWidth , (unsigned int)(desktop.right  - desktop.left));
+        dataWidth  = realWidth * 3;
+        dataOffset =
+          (((m_grabInfo.dwHeight - realHeight) >> 1)  * m_grabInfo.dwBufferWidth +
+          ((m_grabInfo.dwWidth  - realWidth ) >> 1)) * 3;
+
+        frame.width  = realWidth;
+        frame.height = realHeight;
+      }
 
-      frame.width   = realWidth;
-      frame.height  = realHeight;
       frame.stride  = frame.width;
       frame.outSize = frame.width * frame.height * 3;
 
@@ -251,7 +275,7 @@ bool NvFBC::GrabFrame(struct FrameInfo & frame)
     {
       DEBUG_WARN("Session was invalidated, attempting to restart");
       DeInitialize();
-      if (!Initialize())
+      if (!Initialize(m_options))
       {
         DEBUG_ERROR("Failed to re-iniaialize");
         return false;

host/Capture/NvFBC.h

@@ -33,7 +33,9 @@ namespace Capture
     NvFBC();
     ~NvFBC();
 
-    bool Initialize();
+    const char * GetName() { return "NvFBC"; }
+
+    bool Initialize(CaptureOptions * options);
     void DeInitialize();
     enum FrameType GetFrameType();
     enum FrameComp GetFrameCompression();
@@ -41,6 +43,9 @@ namespace Capture
     bool GrabFrame(struct FrameInfo & frame);
 
   private:
+    CaptureOptions * m_options;
+    bool m_optNoCrop;
+
     bool m_initialized;
     HMODULE  m_hDLL;
 

host/CaptureFactory.h

@@ -20,6 +20,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 
 #define W32_LEAN_AND_MEAN
 #include <Windows.h>
+#include <vector>
 
 #include "common\debug.h"
 #include "ICapture.h"
@@ -29,29 +30,61 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 class CaptureFactory
 {
 public:
-  static ICapture * GetCaptureDevice()
+  typedef std::vector<ICapture *> DeviceList;
+
+  static DeviceList & GetDevices()
   {
-    ICapture *dev;
+    static DeviceList devices;
+    if (!devices.empty())
+      return devices;
 
-    dev = new Capture::NvFBC();
-    if (dev->Initialize())
+    devices.push_back(new Capture::NvFBC());
+    devices.push_back(new Capture::DXGI ());
+
+    return devices;
+  }
+
+  static ICapture * GetDevice(const char * name, CaptureOptions * options)
+  {
+    DeviceList devices = GetDevices();
+    for (DeviceList::const_iterator it = devices.begin(); it != devices.end(); ++it)
     {
-      DEBUG_INFO("Using NvFBC");
-      return dev;
-    }
-    dev->DeInitialize();
-    delete dev;
+      ICapture * device = *it;
+      if (_strcmpi(name, device->GetName()) != 0)
+        continue;
 
-    dev = new Capture::DXGI();
-    if (dev->Initialize())
+      if (device->Initialize(options))
+      {
+        DEBUG_INFO("Using %s", device->GetName());
+        return device;
+      }
+
+      device->DeInitialize();
+      DEBUG_ERROR("Failed to initialize %s", device->GetName());
+      return NULL;
+    }
+
+    DEBUG_ERROR("No such device: %s", name);
+    return NULL;
+  }
+
+  static ICapture * DetectDevice(CaptureOptions * options)
+  {
+    DeviceList devices = GetDevices();
+    for (DeviceList::const_iterator it = devices.begin(); it != devices.end(); ++it)
     {
-      DEBUG_INFO("Using DXGI");
-      return dev;
-    }
-    dev->DeInitialize();
-    delete dev;
+      ICapture * device = *it;
 
-    DEBUG_ERROR("Failed to initialize a compatible capture device");
+      DEBUG_INFO("Trying %s", device->GetName());
+      if (device->Initialize(options))
+      {
+        DEBUG_INFO("Using %s", device->GetName());
+        return device;
+      }
+      device->DeInitialize();
+    }
+
+    DEBUG_ERROR("Failed to initialize a capture device");
     return NULL;
   }
 };

host/ICapture.h

@@ -19,6 +19,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #pragma once
 
 #include "common/KVMGFXHeader.h"
+#include <vector>
 
 struct FrameInfo
 {
@@ -30,10 +31,14 @@ struct FrameInfo
   size_t outSize;
 };
 
+typedef std::vector<const char *> CaptureOptions;
+
 __interface ICapture
 {
 public:
-  bool Initialize();
+  const char * GetName();
+  
+  bool Initialize(CaptureOptions * options);
   void DeInitialize();
   enum FrameType GetFrameType();
   enum FrameComp GetFrameCompression();

host/Service.cpp

@@ -40,19 +40,12 @@ Service::~Service()
 {
 }
 
-bool Service::Initialize()
+bool Service::Initialize(ICapture * captureDevice)
 {
   if (m_initialized)
     DeInitialize();
 
-  m_capture = CaptureFactory::GetCaptureDevice();
-  if (!m_capture)
-  {
-    DEBUG_ERROR("Failed to initialize capture interface");
-    DeInitialize();
-    return false;
-  }
-
+  m_capture = captureDevice;
   if (!m_ivshmem->Initialize())
   {
     DEBUG_ERROR("IVSHMEM failed to initalize");

host/Service.h

@@ -35,7 +35,7 @@ public:
     return m_instance;
   }
 
-  bool Initialize();
+  bool Initialize(ICapture * captureDevice);
   void DeInitialize();
   bool Process();
 

host/kvm-ivshmem-host.vcxproj

@@ -160,6 +160,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="..\vendor\getopt\getopt.c" />
     <ClCompile Include="Capture\DXGI.cpp" />
     <ClCompile Include="Capture\NvFBC.cpp" />
     <ClCompile Include="ivshmem.cpp" />

host/kvm-ivshmem-host.vcxproj.filters

@@ -39,6 +39,9 @@
     <ClCompile Include="Capture\DXGI.cpp">
       <Filter>Source Files\Capture</Filter>
     </ClCompile>
+    <ClCompile Include="..\vendor\getopt\getopt.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="ivshmem.h">

host/main.cpp

@@ -17,70 +17,244 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
 #include <Windows.h>
-#include "common\debug.h"
+#include <Shlwapi.h>
 
+#include "common\debug.h"
+#include "vendor\getopt\getopt.h"
+
+#include "CaptureFactory.h"
 #include "Service.h"
 
-#ifdef DEBUG
 #include <io.h>
 #include <fcntl.h>
 #include <iostream>
-#endif
+
+int parseArgs(struct StartupArgs & args);
+int run(struct StartupArgs & args);
+
+void doHelp();
+void doLicense();
+
+bool consoleActive = false;
+void setupConsole();
+
+struct StartupArgs
+{
+  bool foreground;
+  const char * captureDevice;
+  CaptureOptions captureOptions;
+};
 
 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdParam, int iCmdShow)
 {
-#ifdef DEBUG
+  struct StartupArgs args;
+  ZeroMemory(&args, sizeof(struct StartupArgs));
+  int ret = parseArgs(args);
+  if (ret == 0)
   {
-    HANDLE _handle;
-    int    _conout;
-    FILE * fp;
-
-    AllocConsole();
-
-    CONSOLE_SCREEN_BUFFER_INFO conInfo;
-    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &conInfo);
-    conInfo.dwSize.Y = 500;
-    SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), conInfo.dwSize);
-
-    _handle = GetStdHandle(STD_INPUT_HANDLE);
-    _conout = _open_osfhandle((intptr_t)_handle, _O_TEXT);
-    fp = _fdopen(_conout, "r");
-    freopen_s(&fp, "CONIN$", "r", stdin);
-
-    _handle = GetStdHandle(STD_OUTPUT_HANDLE);
-    _conout = _open_osfhandle((intptr_t)_handle, _O_TEXT);
-    fp      = _fdopen(_conout, "w");
-    freopen_s(&fp, "CONOUT$", "w", stdout);
-
-    _handle = GetStdHandle(STD_ERROR_HANDLE);
-    _conout = _open_osfhandle((intptr_t)_handle, _O_TEXT);
-    fp = _fdopen(_conout, "w");
-    freopen_s(&fp, "CONOUT$", "w", stderr);
-
-    std::ios::sync_with_stdio();
-    std::wcout.clear();
-    std::cout.clear();
-    std::wcerr.clear();
-    std::cerr.clear();
-    std::wcin.clear();
-    std::cin.clear();
+    ret = run(args);
+    if (ret != 0)
+    {
+      if (!args.foreground)
+      {
+        setupConsole();
+        fprintf(stderr, "An error occurred, re-run in forground mode (-f) for more information\n");
+      }
+    }
   }
-#endif
 
-  Service *svc = svc->Get();
-  if (!svc->Initialize())
+  if (consoleActive)
   {
-    DEBUG_ERROR("Failed to initialize service");
+    fprintf(stderr, "\nPress enter to terminate...");
+    fflush(stderr);
+    getc(stdin);
+  }
+
+  return ret;
+}
+
+int run(struct StartupArgs & args)
+{
+  if (args.foreground)
+    setupConsole();
+
+  ICapture * captureDevice;
+  if (args.captureDevice == NULL)
+    captureDevice = CaptureFactory::DetectDevice(&args.captureOptions);
+  else
+  {
+    captureDevice = CaptureFactory::GetDevice(args.captureDevice, &args.captureOptions);
+    if (!captureDevice)
+    {
+      setupConsole();
+      fprintf(stderr, "Failed to configure requested capture device\n");
+      return -1;
+    }
+  }
+
+  if (!captureDevice)
+  {
+    setupConsole(); 
+    fprintf(stderr, "Unable to configure a capture device\n");
     return -1;
   }
 
+  Service *svc = svc->Get();
+  if (!svc->Initialize(captureDevice))
+    return -1;
+
   while (true)
     if (!svc->Process())
       break;
 
   svc->DeInitialize();
-#ifdef DEBUG
-  getc(stdin);
-#endif
   return 0;
 }
+
+int parseArgs(struct StartupArgs & args)
+{
+  int c;
+  while((c = getopt(__argc, __argv, "hc:o:fl")) != -1)
+  {
+    switch (c)
+    {
+    case '?':
+    case 'h':
+      doHelp();
+      return -1;
+
+    case 'c':
+    {
+      const CaptureFactory::DeviceList deviceList = CaptureFactory::GetDevices();
+
+      bool found = false;
+      if (strcmp(optarg, "?") != 0)
+      {
+        for (CaptureFactory::DeviceList::const_iterator it = deviceList.begin(); it != deviceList.end(); ++it)
+        {
+          if (_strcmpi(optarg, (*it)->GetName()) == 0)
+          {
+            args.captureDevice = (*it)->GetName();
+            found = true;
+            break;
+          }
+        }
+
+        if (!found)
+        {
+          setupConsole();
+          fprintf(stderr, "Invalid capture device: %s\n\n", optarg);          
+        }
+      }
+
+      if (!found)
+      {
+        setupConsole();
+        fprintf(stderr, "Available Capture Devices:\n\n");
+        for (CaptureFactory::DeviceList::const_iterator it = deviceList.begin(); it != deviceList.end(); ++it)
+          fprintf(stderr, "  %s\n", (*it)->GetName());
+        return -1;
+      }
+      break;
+    }
+
+    case 'o':
+    {
+      args.captureOptions.push_back(optarg);
+      break;
+    }
+
+    case 'f':
+      args.foreground = true;
+      break;
+
+    case 'l':
+      doLicense();
+      return -1;
+    }
+  }
+
+  return 0;
+}
+
+void doHelp()
+{
+  setupConsole();
+  const char *app = PathFindFileNameA(__argv[0]);
+  fprintf(stderr,
+    "Usage: %s [OPTION]...\n"
+    "Example: %s -c ?\n"
+    "\n"
+    "  -h  Print out this help\n"
+    "  -c  Specify the capture device to use or ? to list availble (device is probed if not specified)\n"
+    "  -o  Option to pass to the capture device, may be specified multiple times for extra options\n"
+    "  -f  Foreground mode\n"
+    "  -l  License information\n",
+    app,
+    app
+  );
+}
+
+void doLicense()
+{
+  setupConsole();
+  fprintf(stderr,
+    "KVMGFX Client - A KVM Client for VGA Passthrough\n"
+    "Copyright(C) 2017 Geoffrey McRae <geoff@hostfission.com>\n"
+    "\n"
+    "This program is free software; you can redistribute it and / or modify it under\n"
+    "the terms of the GNU General Public License as published by the Free Software\n"
+    "Foundation; either version 2 of the License, or (at your option) any later\n"
+    "version.\n"
+    "\n"
+    "This program is distributed in the hope that it will be useful, but WITHOUT ANY\n"
+    "WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A\n"
+    "PARTICULAR PURPOSE.See the GNU General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU General Public License along with\n"
+    "this program; if not, write to the Free Software Foundation, Inc., 59 Temple\n"
+    "Place, Suite 330, Boston, MA 02111 - 1307 USA\n"
+  );
+}
+
+void setupConsole()
+{
+  if (consoleActive)
+    return;
+
+  HANDLE _handle;
+  int    _conout;
+  FILE * fp;
+
+  AllocConsole();
+
+  CONSOLE_SCREEN_BUFFER_INFO conInfo;
+  GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &conInfo);
+  conInfo.dwSize.Y = 500;
+  SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), conInfo.dwSize);
+
+  _handle = GetStdHandle(STD_INPUT_HANDLE);
+  _conout = _open_osfhandle((intptr_t)_handle, _O_TEXT);
+  fp = _fdopen(_conout, "r");
+  freopen_s(&fp, "CONIN$", "r", stdin);
+
+  _handle = GetStdHandle(STD_OUTPUT_HANDLE);
+  _conout = _open_osfhandle((intptr_t)_handle, _O_TEXT);
+  fp = _fdopen(_conout, "w");
+  freopen_s(&fp, "CONOUT$", "w", stdout);
+
+  _handle = GetStdHandle(STD_ERROR_HANDLE);
+  _conout = _open_osfhandle((intptr_t)_handle, _O_TEXT);
+  fp = _fdopen(_conout, "w");
+  freopen_s(&fp, "CONOUT$", "w", stderr);
+
+  std::ios::sync_with_stdio();
+  std::wcout.clear();
+  std::cout.clear();
+  std::wcerr.clear();
+  std::cerr.clear();
+  std::wcin.clear();
+  std::cin.clear();
+
+  consoleActive = true;
+}

vendor/getopt/README.txt

@@ -0,0 +1 @@
+This source comes from: https://gist.github.com/superwills/5815344

vendor/getopt/getopt.c

@@ -0,0 +1,106 @@
+#include "getopt.h"
+
+/*
+* Copyright (c) 1987, 1993, 1994
+*      The Regents of the University of California.  All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+*    notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+*    notice, this list of conditions and the following disclaimer in the
+*    documentation and/or other materials provided with the distribution.
+* 3. All advertising materials mentioning features or use of this software
+*    must display the following acknowledgement:
+*      This product includes software developed by the University of
+*      California, Berkeley and its contributors.
+* 4. Neither the name of the University nor the names of its contributors
+*    may be used to endorse or promote products derived from this software
+*    without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*/
+
+#include <string.h>
+#include <stdio.h>
+
+int     opterr = 1,             /* if error message should be printed */
+optind = 1,             /* index into parent argv vector */
+optopt,                 /* character checked for validity */
+optreset;               /* reset getopt */
+char    *optarg;                /* argument associated with option */
+
+#define BADCH   (int)'?'
+#define BADARG  (int)':'
+#define EMSG    ""
+
+                                /*
+                                * getopt --
+                                *      Parse argc/argv argument vector.
+                                */
+int getopt(int nargc, char * const nargv[], const char *ostr)
+{
+  static char *place = EMSG;              /* option letter processing */
+  const char *oli;                              /* option letter list index */
+
+  if (optreset || !*place) {              /* update scanning pointer */
+    optreset = 0;
+    if (optind >= nargc || *(place = nargv[optind]) != '-') {
+      place = EMSG;
+      return (-1);
+    }
+    if (place[1] && *++place == '-') {      /* found "--" */
+      ++optind;
+      place = EMSG;
+      return (-1);
+    }
+  }                                       /* option letter okay? */
+  if ((optopt = (int)*place++) == (int)':' ||
+    !(oli = strchr(ostr, optopt))) {
+    /*
+    * if the user didn't specify '-' as an option,
+    * assume it means -1.
+    */
+    if (optopt == (int)'-')
+      return (-1);
+    if (!*place)
+      ++optind;
+    if (opterr && *ostr != ':')
+      (void)printf("illegal option -- %c\n", optopt);
+    return (BADCH);
+  }
+  if (*++oli != ':') {                    /* don't need argument */
+    optarg = NULL;
+    if (!*place)
+      ++optind;
+  }
+  else {                                  /* need an argument */
+    if (*place)                     /* no white space */
+      optarg = place;
+    else if (nargc <= ++optind) {   /* no arg */
+      place = EMSG;
+      if (*ostr == ':')
+        return (BADARG);
+      if (opterr)
+        (void)printf("option requires an argument -- %c\n", optopt);
+      return (BADCH);
+    }
+    else                            /* white space */
+      optarg = nargv[optind];
+    place = EMSG;
+    ++optind;
+  }
+  return (optopt);                        /* dump back option letter */
+}

vendor/getopt/getopt.h

@@ -0,0 +1,20 @@
+#ifndef GETOPT_H
+#define GETOPT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+  extern int   opterr;    /* if error message should be printed */
+  extern int   optind;    /* index into parent argv vector */
+  extern int   optopt;    /* character checked for validity */
+  extern int   optreset;  /* reset getopt  */
+  extern char *optarg;    /* argument associated with option */
+
+  int getopt(int nargc, char * const nargv[], const char *ostr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif