On 10/08/2007 02:01, Ilya Bobir wrote:
> Ilya Bobir wrote:
>> [...]
>>
>> It does work on NT. But CreateProcess(..., CREATE_NO_WINDOW, ...) is
>> needed. An example implementation is attached.
>>
>
> I've just found slightly different approach to creating a console for a
> child process. It has an advantage of creating one console per child
> thus allowing communication with more that one child process.
> Here is the code:
>
> SECURITY_ATTRIBUTES sa;
> PROCESS_INFORMATION pi;
> HANDLE newstdin, newstdout;
> HANDLE read_stdout, write_stdin;
>
> sa.lpSecurityDescriptor = 0;
> sa.nLength = sizeof(SECURITY_ATTRIBUTES);
> sa.bInheritHandle = true;
>
> CreatePipe(&newstdin, &write_stdin, &sa, 0);
> CreatePipe(&read_stdout, &newstdout, &sa, 0);
>
> GetStartupInfo(&si);
> si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
> si.wShowWindow = SW_HIDE; // hide child application window
> si.hStdOutput = newstdout; // use newstdout instead of STDOUT
> si.hStdError = newstdout; // use newstdout instead of STDERR
> si.hStdInput = newstdin; // use newstdin instead of STDIN
>
> if(0 == CreateProcess(
> exe, NULL, NULL, NULL, true, CREATE_NEW_CONSOLE,
> NULL, NULL, &si, &pi))
> {
> printf("\nCreateProcess() fails with error: %i", GetLastError());
> return -1;
> }
>
>
> In case pipes are in blocking mode then the PeekNamedPipe() call can be
> used to check for incoming data:
>
> if (0 == PeekNamedPipe(
> read_stdout, buf, BUFSIZE - 1, &bread, &avail, NULL))
> {
> printf("\nPeekNamedPipe() fails with error: %i", GetLastError());
> break;
> }
>
> if (bread > 0)
> {
> // Data have arrived
> }
All looks good stuff - I'll try and get round to trying it out this weekend.
TTFN
Mike
--
Sage advice: To cook well, learn all about spices.
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