Messages in this thread | | | Date | Thu, 28 Apr 2005 16:59:21 -0400 | From | Xin Zhao <> | Subject | Re: dumb question: How to create your own log files in a kernel module? |
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Thanks for kind help.
I know printk can do this job. But what I really want is to print logs to a file specified by me instead of /var/log/messages. And, the messages irrelevant to my module should not be written into that file. Now my log mixed with other logs in /var/log/message, which bother me much. :(
I guess the KERN_PRIVATE might work for this. Can you give me more details?
Thanks again!
Xin
On 4/28/05, Richard B. Johnson <linux-os@analogic.com> wrote: > On Thu, 28 Apr 2005, Xin Zhao wrote: > > > Can anyone give me a hand? or point me to somewhere I can find related > > information? > > > > Thanks in advance! > > > > Xin > > printk(KERN_XXX"whatever") was designed for this. > > #define KERN_EMERG "<0>" /* system is unusable */ > #define KERN_ALERT "<1>" /* action must be taken immediately */ > #define KERN_CRIT "<2>" /* critical conditions */ > #define KERN_ERR "<3>" /* error conditions */ > #define KERN_WARNING "<4>" /* warning conditions */ > #define KERN_NOTICE "<5>" /* normal but significant condition */ > #define KERN_INFO "<6>" /* informational */ > #define KERN_DEBUG "<7>" /* debug-level messages */ > printk(KERN_DEBUG fmt,##arg) > printk(KERN_INFO fmt,##arg) > > You could define your own, KERN_PRIVATE "<8>" and have the syslog > facility filter on that. > > Other ways are to write stuff to a buffer or linked-list and > read it out using an ioctl() or read() in your module. If you > do this, make sure that your module code doesn't wait forever > if the buffer gets full. > > Cheers, > Dick Johnson > Penguin : Linux version 2.6.11 on an i686 machine (5537.79 BogoMips). > Notice : All mail here is now cached for review by Dictator Bush. > 98.36% of all statistics are fiction. > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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