How to use logs under Device driver

[cbalu]

Hi,

This is my first post in this forum.

I am currently working with Device driver where in i need to move some of my debug messages to /var/log/messages.

Can i use syslog function call under Device driver for this one?

I forgot to mention. I need to move the debug messages to /var/log/messages only i don't want them to be printed on the stdout(i.e.,)console

- Bala C-

[gerard4143]

Is your device driver a kernel module? If it is then use printk...Hope this Helps...Gerard4143

Welcome to the forums

[cbalu]

Its a I2C device driver for a custom hardware which is a kernel module only.

If i am correct, using the printk function will make the debug message print in the console also. But, i am looking for a different solution wherein i need to print Driver Init and Exit messages only to the console and move rest of my debug messages under driver to /var/log/messages

[gerard4143]

Check out this link...especially the section "replacing printks"

The Linux Kernel Module Programming Guide


Hope this helps...Gerard4143

[cbalu]

Gerard4143 thanks for your reply.

But, i don't need this one.
Just to make things clear.Can i use syslog() function call inside driver.

[gerard4143]

Can i use syslog() function call inside driver.

Depends...is the driver a user program or is it a kernel module. If its a user program than yes you can use it...if its a kernel module then no....Hope this helps

[cbalu]

It is a kernel module only.

So i can't use syslog() function for this one.

Is there any other way.
I will explain my problem fully.

I have a linux device driver(kernal module) for a custom hardware. In which i have printk statements inside module_init and module_exit functions which i need to show up in the console itself. But,when using the driver i have so many debug printk statements which i don't want to show up in the console.

Instead move those messages to /var/log/messages so that while debugging the driver it will be usefull.

[cbalu]

Finally i found the solution which i was looking for about 2 days.

I am posting the link for others reference

This is the link