Hi,
I´m implementing a syscall and I want to write some information on the user terminal. I´ve heard that using printk(KERN_ALERT"String") could return "String" to the terminal, but it doesn´t. It just modifies the file /var/log/messages. My distribution is Fedora Core 2 (kernel 2.6.5). Did somebody get the same problem? Did I do something wrong? The syscall is working perfectly, the only problem is that I want to return information to the user, and using the copy_to_user function isn´t appropriate, once there are lots of information (more than 5) I want to retrieve, with different types (not only string).
Thanks
The console prints the message according to the loglevel. You can change the loglevel of the console by
klogd -c <priority>
eg,
If you want to print the message with priority equal or greater than 2. Then do,
klogd -c 2
IF it is already running kill it and run the above command.
You can print the message to any console by giving it highest priority <0>
printk("<0> Hello world\n");Learn it in detail here. http://www.xml.com/ldd/chapter/book/ch04.html
regards manish
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