src/Utils/CreateProcessHelper.h

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2016 - TortoiseGit
   4 // Copyright (C) 2009-2010 - TortoiseSVN
   5
   6 // This program is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License
   8 // as published by the Free Software Foundation; either version 2
   9 // of the License, or (at your option) any later version.
  10
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software Foundation,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 #pragma once
  21
  22 /**
  23  * A helper class for invoking CreateProcess(). The lpProcessInformation
  24  * can point to an uninitialized struct - it's memset to all zeroes inside.
  25  */
  26
  27 class CCreateProcessHelper
  28 {
  29 public:
  30     static bool CreateProcess(LPCTSTR lpApplicationName,
  31                     LPTSTR lpCommandLine,
  32                     LPCTSTR lpCurrentDirectory,
  33                     LPPROCESS_INFORMATION lpProcessInformation);
  34     static bool CreateProcess(LPCTSTR lpApplicationName,
  35                     LPTSTR lpCommandLine,
  36                     LPPROCESS_INFORMATION lpProcessInformation);
  37
  38     static bool CreateProcessDetached(LPCTSTR lpApplicationName,
  39                     LPTSTR lpCommandLine,
  40                     LPCTSTR lpCurrentDirectory);
  41     static bool CreateProcessDetached(LPCTSTR lpApplicationName,
  42                     LPTSTR lpCommandLine);
  43 };
  44
  45 inline bool CCreateProcessHelper::CreateProcess(LPCTSTR applicationName,
  46     LPTSTR commandLine, LPCTSTR currentDirectory,
  47     LPPROCESS_INFORMATION processInfo)
  48 {
  49         STARTUPINFO startupInfo = { 0 };
  50     startupInfo.cb = sizeof(STARTUPINFO);
  51
  52     memset(processInfo, 0, sizeof(PROCESS_INFORMATION));
  53     const BOOL result = ::CreateProcess(applicationName, commandLine, nullptr, nullptr, FALSE, CREATE_UNICODE_ENVIRONMENT, nullptr, currentDirectory, &startupInfo, processInfo);
  54     return result != 0;
  55 }
  56
  57 inline bool CCreateProcessHelper::CreateProcess(LPCTSTR applicationName,
  58     LPTSTR commandLine, LPPROCESS_INFORMATION processInformation)
  59 {
  60     return CreateProcess( applicationName, commandLine, 0, processInformation );
  61 }
  62
  63 inline bool CCreateProcessHelper::CreateProcessDetached(LPCTSTR lpApplicationName,
  64     LPTSTR lpCommandLine, LPCTSTR lpCurrentDirectory)
  65 {
  66     PROCESS_INFORMATION process;
  67     if (!CreateProcess(lpApplicationName, lpCommandLine, lpCurrentDirectory, &process))
  68         return false;
  69
  70     CloseHandle(process.hThread);
  71     CloseHandle(process.hProcess);
  72     return true;
  73 }
  74
  75 inline bool CCreateProcessHelper::CreateProcessDetached(LPCTSTR lpApplicationName,
  76     LPTSTR lpCommandLine)
  77 {
  78     return CreateProcessDetached(lpApplicationName, lpCommandLine, 0);
  79 }