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SRVCHILD.C
资源名称：MSDN_VC98.zip　[点击查看]
上传用户：bangxh
上传日期：2007-01-31
资源大小：42235k
文件大小：4k
源码类别：

Windows编程

开发平台：

Visual C++

SRVCHILD.C：源码内容
  2. /******************************************************************************
  3. *       This is a part of the Microsoft Source Code Samples. 
  4. *       Copyright 1992 - 1997 Microsoft Corporation.
  5. *       All rights reserved. 
  6. *       This source code is only intended as a supplement to 
  7. *       Microsoft Development Tools and/or WinHelp documentation.
  8. *       See these sources for detailed information regarding the 
  9. *       Microsoft samples programs.
  10. ******************************************************************************/
  12. /*++
  14. Copyright 1992 - 1997 Microsoft Corporation
  16. Module Name:
  18.     SrvChild.c
  20. Abstract:
  22.     The server component of Remote. It spawns a child process
  23.     and redirects the stdin/stdout/stderr of child to itself.
  24.     Waits for connections from clients - passing the
  25.     output of child process to client and the input from clients
  26.     to child process.
  28. Author:
  30.     Rajivendra Nath  2-Jan-1992
  31.     Dave Hart        30 May 1997 split from Server.c
  33. Environment:
  35.     Console App. User mode.
  37. Revision History:
  39. --*/
  41. #include <windows.h>
  42. #include <stdio.h>
  43. #include <stdlib.h>
  44. #include <process.h>
  45. #include <io.h>
  46. #include <string.h>
  47. #include "Remote.h"
  48. #include "Server.h"
  51. VOID
  52. FASTCALL
  53. StartChildOutPipeRead(
  54.     VOID
  55.     )
  56. {
  57.     ReadChildOverlapped.OffsetHigh =
  58.         ReadChildOverlapped.Offset = 0;
  60.     if ( ! ReadFileEx(
  61.                hReadChildOutput,
  62.                ReadChildBuffer,
  63.                sizeof(ReadChildBuffer) - 1,                  // allow for null term
  64.                &ReadChildOverlapped,
  65.                ReadChildOutputCompleted
  66.                )) {
  68.         if (INVALID_HANDLE_VALUE != hWriteChildStdIn) {
  70.             CANCELIO( hWriteChildStdIn );
  71.             CloseHandle( hWriteChildStdIn );
  72.             hWriteChildStdIn = INVALID_HANDLE_VALUE;
  73.         }
  74.     }
  75. }
  78. VOID
  79. WINAPI
  80. ReadChildOutputCompleted(
  81.     DWORD dwError,
  82.     DWORD cbRead,
  83.     LPOVERLAPPED lpO
  84.     )
  85. {
  86.     UNREFERENCED_PARAMETER(lpO);
  88.     //
  89.     // We can get called after hWriteTempFile
  90.     // is closed after the child has exited.
  91.     //
  93.     if (! dwError &&
  94.         INVALID_HANDLE_VALUE != hWriteTempFile) {
  96.         //
  97.         // Start a write to the temp file.
  98.         //
  100.         ReadChildOverlapped.OffsetHigh = 0;
  101.         ReadChildOverlapped.Offset = dwWriteFilePointer;
  103.         if ( ! WriteFileEx(
  104.                    hWriteTempFile,
  105.                    ReadChildBuffer,
  106.                    cbRead,
  107.                    &ReadChildOverlapped,
  108.                    WriteTempFileCompleted
  109.                    )) {
  111.             dwError = GetLastError();
  113.             if (ERROR_DISK_FULL == dwError) {
  115.                 printf("Remote: disk full writing temp file %s, exitingn", SaveFileName);
  117.                 if (INVALID_HANDLE_VALUE != hWriteChildStdIn) {
  119.                     CANCELIO( hWriteChildStdIn );
  120.                     CloseHandle( hWriteChildStdIn );
  121.                     hWriteChildStdIn = INVALID_HANDLE_VALUE;
  122.                 }
  124.             } else {
  126.                 ErrorExit("WriteFileEx for temp file failed.");
  127.             }
  128.         }
  129.     }
  130. }
  133. VOID
  134. WINAPI
  135. WriteTempFileCompleted(
  136.     DWORD dwError,
  137.     DWORD cbWritten,
  138.     LPOVERLAPPED lpO
  139.     )
  140. {
  141.     UNREFERENCED_PARAMETER(lpO);
  143.     if (dwError) {
  145.         if (ERROR_DISK_FULL == dwError) {
  147.             printf("Remote: disk full writing temp file %s, exitingn", SaveFileName);
  149.             if (INVALID_HANDLE_VALUE != hWriteChildStdIn) {
  151.                 CANCELIO( hWriteChildStdIn );
  152.                 CloseHandle( hWriteChildStdIn );
  153.                 hWriteChildStdIn = INVALID_HANDLE_VALUE;
  154.             }
  156.             return;
  158.         } else {
  160.             SetLastError(dwError);
  161.             ErrorExit("WriteTempFileCompleted may need work");
  162.         }
  163.     }
  165.     dwWriteFilePointer += cbWritten;
  167.     TRACE(CHILD, ("Wrote %d bytes to temp filen", cbWritten));
  169.     StartServerToClientFlow();
  171.     //
  172.     // Start another read against the child input.
  173.     //
  175.     StartChildOutPipeRead();
  176. }