CODEWITHSUNDEEP
linuxdebuggingdriversyslogprintk
Jan Kuei Yang
Jan Kuei Yang

Reputation: 11

What is the similar to printk in user mode?

We can use printk to send debug message in kernel driver. I have a user mode AP that call kernel driver. I would like to output user mode AP debug message with kernel mode driver at the same time. How to do that?

Upvotes: 1

Views: 1251

Answers (2)

Bryan
Bryan

Reputation: 2138

You might want to check out syslog(). Generally though, you can probably do what you want without playing in the system log by using the normal print function for whatever language you're using in userspace, and manually looking at the two different outputs.

Upvotes: 0

Kimvais
Kimvais

Reputation: 39638

If I understood your question correctly, I guess you are looking for syslog C API. $ man 3 syslog tells you everything you need.

Upvotes: 1

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