[Buildroot] syslog output to serial console

[Buildroot] syslog output to serial console

[Bryce Schober]

I realize that this is a bit off-topic...

I've configured my target for boot-loader & linux boot serial console
output, but now I'd really like to redirect the rest of what gets into
syslog to the serial console as well. Is there a way to do that with
busybox syslog?

The primary use-case here is for seeing the output results / errors from my
set of /etc/init.d scripts, so if it's not feasible to get this
re-direction up and running early in the boot process, it wouldn't be worth
it.

Thanks for any advice or pointers you can offer...
<><  <><  <><
Bryce Schober
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[Buildroot] syslog output to serial console

[Arnout Vandecappelle]

On 21/08/13 22:22, Bryce Schober wrote:
> I realize that this is a bit off-topic...
>
> I've configured my target for boot-loader & linux boot serial console
> output, but now I'd really like to redirect the rest of what gets into
> syslog to the serial console as well. Is there a way to do that with
> busybox syslog?
>
> The primary use-case here is for seeing the output results / errors from
> my set of /etc/init.d scripts, so if it's not feasible to get this
> re-direction up and running early in the boot process, it wouldn't be
> worth it.

  Actually, the output of init scripts should already go to the console. 
When the kernel mounts the rootfs and calls init, it sends its stdout and 
stderr to /dev/console. If your rootfs is an initramfs, however, the 
kernel doesn't automount the devtmpfs so /dev/console doesn't exist when 
/init is executed. We solve this with the script in fs/cpio/init. If this 
is the problem, you'll see that the kernel reports something like "Unable 
to find initial console".

  The only thing captured by syslog are the messages going to /dev/log, 
which are sent out by some daemons. If you want this output to go to 
/dev/console as well, you can add something like

::respawn:/usr/bin/tail -50 -F /var/log/messages

to /etc/inittab.


  Regards,
  Arnout

>
> Thanks for any advice or pointers you can offer...
> <><  <><  <><
> Bryce Schober
>
>
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> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
>


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
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[Buildroot] syslog output to serial console

[Danomi Manchego]

On Wed, Aug 21, 2013 at 4:22 PM, Bryce Schober <bryce.schober@gmail.com>wrote:

> I'd really like to redirect the rest of what gets into syslog to the
> serial console as well. Is there a way to do that with busybox syslog?
>

If you are using "logger" to to send stuff to syslog, then you can add a -s
(or --stderr) to send the messages to both syslog and stderr.

Danomi -
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