ioctl sign-extensio on amd64 (again)

[Christian Kujau]

On Fri, 4 Aug 2017, Christian Kujau wrote:
> On Fri, 4 Aug 2017, Per olof Ljungmark wrote:
> > In building a camera system with multimedia/motion, syslog is filled up with,
> > kernel: WARNING pid 72755 (motion): ioctl sign-extension ioctl
> > ffffffffc0585611
> > 
> > After som googling this appears to be a long standing problem with some python
> > stuff and amd64.
> > 
> > My question is, how can I get rid of the messages? Motion works as expected, I
> > just do not want this filling up the logs.
> 
> Short of disabling the printf in sys_ioctl() in sys/kern/sys_generic.c, 
> the Right Thing To Do™ would be to fix multimedia/motion not to issue
> those erroneous ioctls. This was reported (and sometimes fixed) for other 
> applications too:
> 
> * sysutils/duplicity-devel/ throws ioctl sign-extension ioctl ffffffff80087467
>   https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=152770
> 
> * mt(8): ioctl sign-extension warnings from some mt commands on 64-bit
>   https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=147938
> 
> * Fix fcntl module to accept 'unsigned long' type commands for ioctl(2).
>   https://bugs.python.org/issue25026
> 
> Maybe the respective commits could shed some light on how to do this for 
> multimedia/motion?

Should've looked before hitting "Send":

 * Fix ioctl sign-extension warning on FreeBSD
   https://github.com/Motion-Project/motion/pull/393

C.
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