Date: Tue, 2 Mar 2010 14:18:55 +0100 (CET) From: Joerg Pulz <Joerg.Pulz@frm2.tum.de> To: Hans Petter Selasky <hselasky@freebsd.org> Cc: multimedia@freebsd.org Subject: Re: Cuse4BSD + Webcamd + FE_GET_EVENT ioctl Message-ID: <alpine.BSF.2.00.1003021412300.1647@unqrf.nqzva.sez2> In-Reply-To: <201003021123.52292.hselasky@freebsd.org> References: <alpine.BSF.2.00.1003021005510.1647@unqrf.nqzva.sez2> <201003021123.52292.hselasky@freebsd.org>
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On Tue, 2 Mar 2010, Hans Petter Selasky wrote:
> On Tuesday 02 March 2010 10:35:36 Joerg Pulz wrote:
>> v4l-dvb/linux/drivers/media/dvb/dvb-core/dvb_frontend.c
>>
>
> Can you check if the video application you are using is setting the non-
> blocking flag on the file-handle?
>
> flag = 1;
> ret = fcntl(f, O_NONBLOCK, &flag);
>
> That will make the FE_GET_EVENT return immediately.
Hello Hans,
i verified this and i'm pretty sure O_NONBLOCK is set.
I've added this piece of code right before the FE_GET_EVENT ioctl:
- -----
int flags = fcntl(fd_frontend, F_GETFL, 0);
if (flags && O_NONBLOCK)
esyslog("INFO: fd_frontend O_NONBLOCK");
- -----
and the message was displayed in the log.
Here are the relevant code parts where the fd is opened:
- -----
int cDvbDevice::DvbOpen(const char *Name, int Adapter, int Frontend, int Mode, bool ReportError)
{
cString FileName = DvbName(Name, Adapter, Frontend);
int fd = open(FileName, Mode);
if (fd < 0 && ReportError)
LOG_ERROR_STR(*FileName);
return fd;
}
<snip>
int fd_frontend = DvbOpen(DEV_DVB_FRONTEND, adapter, frontend, O_RDWR | O_NONBLOCK);
- -----
So for me it looks like O_NONBLOCK is set and used but it still hangs at
the ioctl.
Any other ideas?
Kind regards
Joerg
- --
The beginning is the most important part of the work.
-Plato
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