>While trying to get = a linux binary running on FreeBSD I encountered
>the following prob= lem 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 handlin= g it is to call tcdrain(), but
I'm
>not sure as to how this transla= tes to the FreeBSD compat layer.
It should probably be translated to= the same BSD call. What it does
is
drain the buffer then send the seria= l BREAK signal: a low-voltage
signal lasting
longer than the length of o= ne normal character. The other side can
detect this and generate
an inte= rrupt, which then may get translated to a signal (see the
stty parameters&n= bsp;
ignbrk, brkint).
-SB
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