On Wed, Dec 07, 2005 at 11:22:46PM +0100, Olaf Hering wrote:
> On Tue, Dec 06, Russell King wrote:
>
> > I'm still highly concerned about this whole idea. Applying this patch
> > _will_ without doubt inconvenience a lot of people who expect ^O to be
> > received as normal.
>
> If one boots with 'console=ttyS0', the 'ctrl o' should be handled only
> on ttyS0. However, I'm not sure if anyone uses ^O in this situation via
> the system console. In our case, ttyS0 is automatically activated via
> add_preferred_console in arch/powerpc/kernel/setup-common.c.
> If there is a clever way to handle ^O only for the system console, would
> such a patch be accepted? I'm currently looking through the code to see
> how it could be done.
Easily. Have a look at the internals of uart_handle_break() in
include/linux/serial_core.h
However, please be aware that ^O is the default control character for
"flush output" which I think is something you may want to use with a
serial console. Eg:
speed 38400 baud; rows 0; columns 0; line = 1;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
lnext = ^V; flush = ^O; min = 1; time = 0;
^^^^^^^^^^^
Hence it's a poor choice. Maybe picking a character which isn't
already used by default for another purpose would be appropriate?
'^]', the classic telnet escape character maybe?
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
