问题描述

C语言，怎样实现获取调用其他程序的输入输出？

各位，我的目的是获取调用其他程序hello.exe输出的信息。网上查找一下代码，但是实现不了！！

为什么呢？

我选择用LCC-win32为编译器。

#include <stdio.h>

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

int main(int argc,char *argv[])
{
SECURITY_ATTRIBUTES sa;
sa.nLength=sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor=NULL;
sa.bInheritHandle=TRUE;

HANDLE outHandle;
outHandle = CreateFile("aa.txt",GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,&sa,CREATE_ALWAYS,0,NULL); 

PROCESS_INFORMATION processInfo;
    STARTUPINFO startUpInfo;

memset(&startUpInfo, 0, sizeof(STARTUPINFO));
memset(&processInfo ,0, sizeof(PROCESS_INFORMATION));

startUpInfo.cb = sizeof(STARTUPINFO);
    startUpInfo.dwFlags = STARTF_USESTDHANDLES;
startUpInfo.wShowWindow=SW_SHOWNORMAL;

    startUpInfo.hStdOutput = outHandle;

if(!CreateProcess("hello.exe",NULL, NULL, NULL, FALSE,
        CREATE_NEW_CONSOLE, NULL, NULL,
        &startUpInfo, &processInfo)){

CloseHandle(outHandle);
printf("open hello.exe error");

}else{

DWORD filesize=1000;
char * buffer = malloc(filesize + 1);
memset(buffer, 0, filesize+1);
DWORD readsize;
ReadFile(outHandle,buffer,filesize,&readsize,NULL);
printf("%sn",buffer);
free(buffer); 

WaitForSingleObject(processInfo.hProcess,INFINITE);
printf("open hello.exe ok");

CloseHandle(outHandle); 

CloseHandle(processInfo.hProcess);
CloseHandle(processInfo.hThread);

}

return 0;
}