From owner-freebsd-hackers@FreeBSD.ORG  Tue Dec  2 21:14:35 2008
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From: Arjan van der Velde <noresult@xs4all.nl>
To: freebsd-hackers@freebsd.org
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Date: Tue, 2 Dec 2008 21:56:28 +0100
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Subject: TCSBRK not implemented in linux compat
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Hi,

While trying to get a linux binary running on FreeBSD I encountered  
the following problem during serial port I/O.

Dec  1 22:22:34 soekris kernel: linux: pid 7239 (linuxbinary): ioctl  
fd=0, cmd=0x5409 ('T',9) is not implemented

0x5409  turns out to be TCSBRK, which is not implemented (yet?). Can  
anyone give me some clues where / how to start implementing this? It  
seems like the linux way of handling it is to call tcdrain(), but I'm  
not sure as to how this translates to the FreeBSD compat layer.

Thanks,

Regards,

Arjan