C语言创建管道实现进程间通信

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>

int runcmd( char* lpCmd )
{
    char buf[2048] = {0};    //缓冲区
    DWORD len;
    HANDLE hRead, hWrite;    // 管道读写句柄
    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    SECURITY_ATTRIBUTES sa;
    
    //ZeroMemory( buf, 2047 );
    sa.nLength = sizeof( sa );
    sa.bInheritHandle = TRUE;    // 管道句柄是可被继承的
    sa.lpSecurityDescriptor = NULL;
    
    // 创建匿名管道，管道句柄是可被继承的
    if( !CreatePipe( &hRead, &hWrite, &sa, 2048 ) )
    {
        printf( "管道创建失败!(%#X)\n", (unsigned int)GetLastError() );
        return 1;
    }

    ZeroMemory( &si, sizeof( si ) );
    si.cb = sizeof( si );
    si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
    si.wShowWindow = SW_HIDE;
    si.hStdError = hWrite;
    si.hStdOutput = hWrite;

    // 创建子进程,运行命令,子进程是可继承的
    if ( !CreateProcess( NULL, lpCmd, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi ) )
    {
        printf( "创建进程失败!(%#x)\n", (unsigned int)GetLastError() );
        CloseHandle( hRead );
        CloseHandle( hWrite );
        return 1;
    }
    // 写端句柄已被继承,本地需要关闭,不然读管道时将被阻塞
    CloseHandle( hWrite );
    // 读管道内容,并显示
    while ( ReadFile( hRead, buf, 2047, &len, NULL ) )
    {
        printf( buf );
        ZeroMemory( buf, 2047 );
    }
    CloseHandle( hRead );
    return 0;
}

int main( int argc, char** argv )
{
      char cmd[256];
      printf( "输入命令行:" );
      gets( cmd );
      runcmd( cmd );
      system( "pause" );
      return 0;
}

　　女孩不哭(191035066)@2011-12-05 19:26:50