m_Input=5; UpdateData(TRUE); HANDLE hChildStdinRd, hChildStdinWr;
HANDLE hChildStdoutRd, hChildStdoutWr; SECURITY_ATTRIBUTES saAttr;
BOOL fSuccess;
// Set the bInheritHandle flag so pipe handles are inherited.
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
if (! CreatePipe(&hChildStdinRd, &hChildStdinWr, &saAttr, 0))
{
MessageBox("创建stdin管道失败!");
return;
}
// Create a pipe for the child process's STDOUT.
if (! CreatePipe(&hChildStdoutRd, &hChildStdoutWr, &saAttr, 0))
{
MessageBox("创建stdout管道失败!");
return;
} PROCESS_INFORMATION piProcInfo;
STARTUPINFO siStartInfo;
BOOL bFuncRetn = FALSE;
// Set up members of the PROCESS_INFORMATION structure.
ZeroMemory( &piProcInfo, sizeof(PROCESS_INFORMATION) );
// Set up members of the STARTUPINFO structure.
ZeroMemory( &siStartInfo, sizeof(STARTUPINFO) );
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.hStdError = hChildStdoutWr;
siStartInfo.hStdOutput = hChildStdoutWr;
siStartInfo.hStdInput = hChildStdinRd;
siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
// Create the child process.
bFuncRetn = CreateProcess(NULL,
"D:/软件代码和资料/Mofat程序和资料/Mofat/release/test4pipe.exe", // command line
NULL, // process security attributes
NULL, // primary thread security attributes
TRUE, // handles are inherited
0, // creation flags
NULL, // use parent's environment
NULL, // use parent's current directory
&siStartInfo, // STARTUPINFO pointer
&piProcInfo); // receives PROCESS_INFORMATION
if (bFuncRetn == 0)
{
MessageBox("创建进程失败!");
return;
}
/*
else
{
CloseHandle(piProcInfo.hProcess);
CloseHandle(piProcInfo.hThread);
return;
}
*/ const int BUFSIZE=1024;
DWORD dwRead, dwWritten;
CHAR chBuf[BUFSIZE]; // Close the write end of the pipe before reading from the
// read end of the pipe.
// if (!CloseHandle(hStdoutWr))
// ErrorExit("CloseHandle failed");
// Read output from the child process, and write to parent's STDOUT.
// for (;;)
{
fSuccess=ReadFile( hChildStdoutRd, chBuf, 5, &dwRead, NULL);
if(fSuccess)
{
CString strTmp;
strTmp.Format("%s",chBuf);
m_Output+=strTmp;
Invalidate();
} }
HANDLE hChildStdoutRd, hChildStdoutWr; SECURITY_ATTRIBUTES saAttr;
BOOL fSuccess;
// Set the bInheritHandle flag so pipe handles are inherited.
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
if (! CreatePipe(&hChildStdinRd, &hChildStdinWr, &saAttr, 0))
{
MessageBox("创建stdin管道失败!");
return;
}
// Create a pipe for the child process's STDOUT.
if (! CreatePipe(&hChildStdoutRd, &hChildStdoutWr, &saAttr, 0))
{
MessageBox("创建stdout管道失败!");
return;
} PROCESS_INFORMATION piProcInfo;
STARTUPINFO siStartInfo;
BOOL bFuncRetn = FALSE;
// Set up members of the PROCESS_INFORMATION structure.
ZeroMemory( &piProcInfo, sizeof(PROCESS_INFORMATION) );
// Set up members of the STARTUPINFO structure.
ZeroMemory( &siStartInfo, sizeof(STARTUPINFO) );
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.hStdError = hChildStdoutWr;
siStartInfo.hStdOutput = hChildStdoutWr;
siStartInfo.hStdInput = hChildStdinRd;
siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
// Create the child process.
bFuncRetn = CreateProcess(NULL,
"D:/软件代码和资料/Mofat程序和资料/Mofat/release/test4pipe.exe", // command line
NULL, // process security attributes
NULL, // primary thread security attributes
TRUE, // handles are inherited
0, // creation flags
NULL, // use parent's environment
NULL, // use parent's current directory
&siStartInfo, // STARTUPINFO pointer
&piProcInfo); // receives PROCESS_INFORMATION
if (bFuncRetn == 0)
{
MessageBox("创建进程失败!");
return;
}
/*
else
{
CloseHandle(piProcInfo.hProcess);
CloseHandle(piProcInfo.hThread);
return;
}
*/ const int BUFSIZE=1024;
DWORD dwRead, dwWritten;
CHAR chBuf[BUFSIZE]; // Close the write end of the pipe before reading from the
// read end of the pipe.
// if (!CloseHandle(hStdoutWr))
// ErrorExit("CloseHandle failed");
// Read output from the child process, and write to parent's STDOUT.
// for (;;)
{
fSuccess=ReadFile( hChildStdoutRd, chBuf, 5, &dwRead, NULL);
if(fSuccess)
{
CString strTmp;
strTmp.Format("%s",chBuf);
m_Output+=strTmp;
Invalidate();
} }
父进程
#include <windows.h>
#include <tchar.h>
#include <stdio.h>
#define BUFSIZE 4096
HANDLE hChildStdinRd, hChildStdinWr,
hChildStdoutRd, hChildStdoutWr,
hInputFile, hStdout;
BOOL CreateChildProcess(VOID);
VOID WriteToPipe(VOID);
VOID ReadFromPipe(VOID);
VOID ErrorExit(LPSTR);
int _tmain(int argc, TCHAR *argv[])
{
SECURITY_ATTRIBUTES saAttr;
BOOL fSuccess;
// Set the bInheritHandle flag so pipe handles are inherited.
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL; // Get the handle to the current STDOUT.
hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
// Create a pipe for the child process's STDOUT.
if (! CreatePipe(&hChildStdoutRd, &hChildStdoutWr, &saAttr, 0))
ErrorExit("Stdout pipe creation failed\n"); // Ensure the read handle to the pipe for STDOUT is not inherited. SetHandleInformation( hChildStdoutRd, HANDLE_FLAG_INHERIT, 0);// Create a pipe for the child process's STDIN.
if (! CreatePipe(&hChildStdinRd, &hChildStdinWr, &saAttr, 0))
ErrorExit("Stdin pipe creation failed\n"); // Ensure the write handle to the pipe for STDIN is not inherited.
SetHandleInformation( hChildStdinWr, HANDLE_FLAG_INHERIT, 0);
// Now create the child process.
fSuccess = CreateChildProcess();
if (! fSuccess)
ErrorExit("Create process failed with"); // Get a handle to the parent's input file.
if (argc == 1)
ErrorExit("Please specify an input file"); printf( "\nContents of %s:\n\n", argv[1]); hInputFile = CreateFile(argv[1], GENERIC_READ, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_READONLY, NULL); if (hInputFile == INVALID_HANDLE_VALUE)
ErrorExit("CreateFile failed");
// Write to pipe that is the standard input for a child process.
WriteToPipe();
// Read from pipe that is the standard output for child process.
ReadFromPipe();
return 0;
}
BOOL CreateChildProcess()
{
TCHAR szCmdline[]=TEXT("child");
PROCESS_INFORMATION piProcInfo;
STARTUPINFO siStartInfo;
BOOL bFuncRetn = FALSE;
// Set up members of the PROCESS_INFORMATION structure.
ZeroMemory( &piProcInfo, sizeof(PROCESS_INFORMATION) );
// Set up members of the STARTUPINFO structure.
ZeroMemory( &siStartInfo, sizeof(STARTUPINFO) );
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.hStdError = hChildStdoutWr;
siStartInfo.hStdOutput = hChildStdoutWr;
siStartInfo.hStdInput = hChildStdinRd;
siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
// Create the child process.
bFuncRetn = CreateProcess(NULL,
szCmdline, // command line
NULL, // process security attributes
NULL, // primary thread security attributes
TRUE, // handles are inherited
0, // creation flags
NULL, // use parent's environment
NULL, // use parent's current directory
&siStartInfo, // STARTUPINFO pointer
&piProcInfo); // receives PROCESS_INFORMATION
if (bFuncRetn == 0)
ErrorExit("CreateProcess failed\n");
else
{
CloseHandle(piProcInfo.hProcess);
CloseHandle(piProcInfo.hThread);
return bFuncRetn;
}
}
VOID WriteToPipe(VOID)
{
DWORD dwRead, dwWritten;
CHAR chBuf[BUFSIZE];
// Read from a file and write its contents to a pipe.
for (;;)
{
if (! ReadFile(hInputFile, chBuf, BUFSIZE, &dwRead, NULL) ||
dwRead == 0) break;
if (! WriteFile(hChildStdinWr, chBuf, dwRead,
&dwWritten, NULL)) break;
}
// Close the pipe handle so the child process stops reading.
if (! CloseHandle(hChildStdinWr))
ErrorExit("Close pipe failed\n");
}
VOID ReadFromPipe(VOID)
{
DWORD dwRead, dwWritten;
CHAR chBuf[BUFSIZE]; // Close the write end of the pipe before reading from the
// read end of the pipe.
if (!CloseHandle(hChildStdoutWr))
ErrorExit("Closing handle failed");
// Read output from the child process, and write to parent's STDOUT.
for (;;)
{
if( !ReadFile( hChildStdoutRd, chBuf, BUFSIZE, &dwRead,
NULL) || dwRead == 0) break;
if (! WriteFile(hStdout, chBuf, dwRead, &dwWritten, NULL))
break;
}
}
VOID ErrorExit (LPSTR lpszMessage)
{
fprintf(stderr, "%s\n", lpszMessage);
ExitProcess(0);
}子进程
#include <windows.h> #define BUFSIZE 4096
VOID main(VOID)
{
CHAR chBuf[BUFSIZE];
DWORD dwRead, dwWritten;
HANDLE hStdin, hStdout;
BOOL fSuccess;
hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
hStdin = GetStdHandle(STD_INPUT_HANDLE);
if ((hStdout == INVALID_HANDLE_VALUE) ||
(hStdin == INVALID_HANDLE_VALUE))
ExitProcess(1);
for (;;)
{
// Read from standard input.
fSuccess = ReadFile(hStdin, chBuf, BUFSIZE, &dwRead, NULL);
if (! fSuccess || dwRead == 0)
break;
// Write to standard output.
fSuccess = WriteFile(hStdout, chBuf, dwRead, &dwWritten, NULL);
if (! fSuccess)
break;
}
}
我调用的是一个写好的程序,我只是想从我的程序中把输入传给它并获得它的输出
siStartInfo.hStdInput = hChildStdinRd;
不知道有问题吗?
用GetStdHandle()这个函数来传,而且是在子进程里得到父进程的建的句柄
我调用的子进程
首先输出Input a number:
然后再输入一个数,记为n
然后输出n次“aaaaaa”我原来以为子进程要先输出Input a number:,此时我调用ReadFile读到buff里,然后再显示到编辑框里,
然后再用WriteFile给子进程输入n,最后再用ReadFile读其余的输出。我把第一个ReadFile和WriteFile交换一下顺序,就OK了。具体原理不明白,我认为是要先把输入全部写给子进程,它需要的时候就去读,然后我们才能读子进程的输出。不管怎样,要感谢各位,特别是tttyd的关注。