Mail Archives: cygwin/2007/01/18/12:02:37
I use unix names. I will post an example code tomorrow.
2007/1/18, Brian Dessent <brian AT dessent DOT net>:
> Florent Morin wrote:
>
> > I have a problem using cygwin. My program does this :
> > - It accept a socket connection,
> > - it listen on it,
> > - it open serial device read/write (O_RDWR),
> > - it create 2 fd_sets,
> > - listening loop :
> > - adding file descriptors to sets,
> > - call select(),
> > - if something is on serial port, I write it to socket,
> > - if something is on socket, i write it to serial
> >
> > It works fine on Linux.
> >
> > With windows, only read or write works fine.
> >
> > If I begin on reading on serial, I can't write after (access denied).
> > If I begin on writing on serial, I can't read after (access denied).
>
> There's probably not enough information here to help. It would be
> easier if you provided a simplified standalone testcase that we can
> compile and run. Are you opening the serial device using the standard
> unix name (/dev/ttyS0) and not the DOS name ("COM1")? The latter will
> succeed but probably not work with things like ioctl or select, because
> in order to emulate those APIs Cygwin has to know to treat the handle
> specifically as a serial device, which it only does if you open it using
> the unix form.
>
> Brian
>
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