Redirecting printk to a file

[Rod Boyce]

Guys,

We are having a bit of a quandary we are trying to redirect the output of
printk from our v24 port to a file in our debug environment / embedded
system so we can use the V24 port for something else.  We are newish to the
world of Linux and cannot seem to figure this our does anybody have any
suggestions?

Regards,
Rod Boyce

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Redirecting printk to a file

[James Petterson]

On Tuesday 31 July 2001 21:11, Dan Malek wrote:
> Rod Boyce wrote:
> > We are having a bit of a quandary we are trying to redirect the output of
> > printk
>
> Don't assign a system console, or bump the loglevel real high.
> Then just use the syslog daemon to move it from the kernel circular
> buffer to a file.  This is all standard Linux stuff.
>
>   -- Dan
For debugging purposes, there's another option that I've found easier to
setup:

1. Set the loglevel to a high priority
echo 1 > /proc/sys/kernel/printk

2. Open a telnet session to your board and, in the opened session:
cat /proc/kmsg

James

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Redirecting printk to a file

[Dan Malek]

Rod Boyce wrote:

> We are having a bit of a quandary we are trying to redirect the output of
> printk

Don't assign a system console, or bump the loglevel real high.
Then just use the syslog daemon to move it from the kernel circular
buffer to a file.  This is all standard Linux stuff.


-- Dan

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