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

posted @ 2011-12-05 20:06  女孩不哭  阅读(8221)  评论(0编辑  收藏