na-get-lib/NaGet.InteropServices/CreateProcessCaller.cs

   1 using System;\r
   2 using System.Diagnostics;\r
   3 using System.Runtime.InteropServices;\r
   4 \r
   5 namespace NaGet.InteropServices\r
   6 {\r
   7         /// <summary>\r
   8         /// Win32 API の<code>CreateProcess</code>を直に叩くためのクラス。\r
   9         /// </summary>\r
  10         /// <remarks>\r
  11         /// .NETのProcess.Startは、<code>CreateProcess(NULL, cmdLine, ...)</code>\r
  12         /// のように第一引数が<code>NULL</code>に相当する呼び出しが、\r
  13         /// *厳密な意味*でできない。厳密な意味で、\r
  14         /// これと同じ呼び出しを実現する必要があるときに使われる。\r
  15         /// </remarks>\r
  16         public class CreateProcessCaller : IDisposable\r
  17         {\r
  18                 #region Win32API\r
  19                 \r
  20                 /*\r
  21                 [StructLayout(LayoutKind.Sequential)]\r
  22                 internal struct SECURITY_ATTRIBUTES\r
  23                 {\r
  24                     public int nLength;\r
  25                     public IntPtr lpSecurityDescriptor;\r
  26                     public int bInheritHandle;\r
  27                 }\r
  28                 */\r
  29                 \r
  30                 [StructLayout(LayoutKind.Sequential)]\r
  31                 internal struct PROCESS_INFORMATION\r
  32                 {\r
  33                         public IntPtr hProcess;\r
  34                         public IntPtr hThread;\r
  35                         public int dwProcessId;\r
  36                         public int dwThreadId;\r
  37                 }\r
  38                 \r
  39                 [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]\r
  40                 struct STARTUPINFO\r
  41                 {\r
  42                         public Int32 cb;\r
  43                         string lpReserved;\r
  44                         string lpDesktop;\r
  45                         string lpTitle;\r
  46                         Int32 dwX;\r
  47                         Int32 dwY;\r
  48                         Int32 dwXSize;\r
  49                         Int32 dwYSize;\r
  50                         Int32 dwXCountChars;\r
  51                         Int32 dwYCountChars;\r
  52                         Int32 dwFillAttribute;\r
  53                         Int32 dwFlags;\r
  54                         Int16 wShowWindow;\r
  55                         Int16 cbReserved2;\r
  56                         IntPtr lpReserved2;\r
  57                         IntPtr hStdInput;\r
  58                         IntPtr hStdOutput;\r
  59                         IntPtr hStdError;\r
  60                 }\r
  61                 \r
  62                 [DllImport("kernel32.dll", CharSet= CharSet.Auto, SetLastError=true)]\r
  63                 static extern bool CreateProcess(string lpApplicationName,\r
  64                         string lpCommandLine,\r
  65                         /* ref SECURITY_ATTRIBUTES lpProcessAttributes, */\r
  66                         IntPtr lpProcessAttributes,\r
  67                         /* ref SECURITY_ATTRIBUTES lpThreadAttributes, */\r
  68                         IntPtr lpThreadAttributes,\r
  69                         bool bInheritHandles,\r
  70                         uint dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory,\r
  71                         [In] ref STARTUPINFO lpStartupInfo,\r
  72                         out PROCESS_INFORMATION lpProcessInformation);\r
  73                 \r
  74                 [DllImport("kernel32", SetLastError=true, ExactSpelling=true)]\r
  75                 static extern UInt32 WaitForSingleObject(IntPtr handle, UInt32 milliseconds);\r
  76                 \r
  77                 [DllImport("kernel32.dll", SetLastError=true)]\r
  78                 [return: MarshalAs(UnmanagedType.Bool)]\r
  79                 static extern bool CloseHandle(IntPtr hObject);\r
  80                 \r
  81                 [DllImport("kernel32.dll", SetLastError = true)]\r
  82                 [return: MarshalAs(UnmanagedType.Bool)]\r
  83                 static extern bool GetExitCodeProcess(IntPtr hProcess, out int lpExitCode);\r
  84                 \r
  85                 #endregion\r
  86                 \r
  87                 STARTUPINFO si;\r
  88                 PROCESS_INFORMATION pi;\r
  89                 \r
  90                 /// <summary>\r
  91                 /// プロセスを生成する\r
  92                 /// </summary>\r
  93                 /// <param name="procInfo">プロセス起動情報。\r
  94                 /// なお、<code>procInfo.UseShellExecute</code>は必ずfalseでなければならない</param>\r
  95                 public CreateProcessCaller(ProcessStartInfo procInfo)\r
  96                 {\r
  97                         if (procInfo.UseShellExecute) {\r
  98                                 throw new ArgumentException("UseShellExecute must be false");\r
  99                         }\r
 100                         si.cb = Marshal.SizeOf(si);\r
 101                         \r
 102                         string lpFileName = (string.IsNullOrEmpty(procInfo.FileName))? null : procInfo.FileName;\r
 103                         \r
 104                         uint dwCreationFlags = 0x0020; // NORMAL_PRIORITY_CLASS\r
 105                         if (procInfo.CreateNoWindow) dwCreationFlags |= 0x08000000; // CREATE_NO_WINDOW\r
 106                         string lpCurrentDirectory = (System.IO.Directory.Exists(procInfo.WorkingDirectory))? procInfo.WorkingDirectory : null;\r
 107                         \r
 108                         bool retValue = CreateProcess(lpFileName, procInfo.Arguments,\r
 109                                                       IntPtr.Zero, IntPtr.Zero,\r
 110                                                       false, dwCreationFlags,\r
 111                                                       IntPtr.Zero, lpCurrentDirectory, ref si, out pi);\r
 112                         if (! retValue) {\r
 113                                 throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());\r
 114                         }\r
 115                         CloseHandle(pi.hThread);\r
 116                 }\r
 117                 \r
 118                 /// <summary>\r
 119                 /// 関連付けられたプロセスが終了するまで、最大指定したミリ秒間待機。 \r
 120                 /// </summary>\r
 121                 /// <param name="timeout">最大待機時間(ミリ秒単位)</param>\r
 122                 /// <returns>終了コード</returns>\r
 123                 public uint WaitForExit(uint timeout)\r
 124                 {\r
 125                         return WaitForSingleObject(pi.hProcess, timeout);\r
 126                 }\r
 127                 \r
 128                 /// <summary>\r
 129                 /// 関連付けられたプロセスが終了するまで無期限に待機。\r
 130                 /// </summary>\r
 131                 /// <returns>終了コード</returns>\r
 132                 public uint WaitForExit()\r
 133                 {\r
 134                         // return WaitForExit(INFINITE)\r
 135                         return WaitForExit(0xFFFFFFFF);\r
 136                 }\r
 137                 \r
 138                 /// <summary>\r
 139                 /// 終了コード\r
 140                 /// </summary>\r
 141                 public int ExitCode {\r
 142                         get {\r
 143                                 int lpExitCode;\r
 144                                 if (! GetExitCodeProcess(pi.hProcess, out lpExitCode) ) {\r
 145                                         throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());\r
 146                                 }\r
 147                                 return lpExitCode;\r
 148                         }\r
 149                 }\r
 150                 \r
 151                 /// <summary>\r
 152                 /// プロセスのハンドルを開放する\r
 153                 /// </summary>\r
 154                 public void Dispose()\r
 155                 {\r
 156                         CloseHandle(pi.hProcess);\r
 157                 }\r
 158                 \r
 159         }\r
 160 }\r