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From Erik Huelsmann <ehu...@gmail.com>
Subject Re: poll/select process's IO on windows
Date Wed, 17 Jun 2009 09:18:33 GMT
Hi Jack,

Regardless of the portability library that you're using, Windows
doesn't allow select() operations on any other than socket handles.

I don't have personal experience how to work around that issue with
APR though, I'm sorry.


With kind regards,

Erik.

On Tue, Jun 16, 2009 at 8:42 PM, Jack Andrews<effbiae@gmail.com> wrote:
> hi,
>
> i want to detect IO on a child process stdio as well
> as a socket from elsewhere.  ie. i want a select()
> on /windows/.
>
> is it possible with APR?  or do i have to hack around?
>
> my first attempt is here:
>
> int main(int c,char** argv)
> { apr_procattr_t *attr;
>  const char*args[]={"cmd.exe",0};
>  apr_sockaddr_t *sa;
>  apr_socket_t *sock;
>  apr_file_t *fds[4];
>  apr_pollfd_t pfd[4],*pfdout;
>  apr_pollset_t *pollset;
>
>  fds[0]=(apr_file_t*)sock;
>  AS(apr_procattr_create(&attr, pool));
>  AS(apr_procattr_io_set(attr, APR_FULL_BLOCK,APR_FULL_BLOCK,APR_FULL_BLOCK));
>  AS(apr_procattr_cmdtype_set(attr, APR_PROGRAM));
>  AS(apr_proc_create(&newproc, "c:\\Windows\\system32\\cmd.exe", args,
> 0, attr, pool));
>  fds[1]=newproc.in;fds[2]=newproc.out;fds[3]=newproc.err;
>  AS(apr_pollset_create(&pollset, 4, pool, APR_POLLSET_WAKEABLE));
>
> #define setpfd(x,a,b,c,d)
> pfd[x].desc_type=(a),pfd[x].reqevents=(b),pfd[x].desc.s=(c),pfd[x].client_data=(d)
>  for(i=0;i<4;i++)
>  { setpfd(i,i?APR_POLL_FILE:APR_POLL_SOCKET,APR_POLLIN|APR_POLLOUT|APR_POLLHUP,(apr_socket_t*)fds[i],NULL);
>    AS(apr_pollset_add(pollset,pfd+i));
>  }
>  for(;APR_TIMEUP==apr_pollset_poll(pollset,0,&n,&pfdout);)
>  { printf("hoo\n");
>  }
>  return 0;
> }
>
>
>
> ta, jack.
>

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