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I am making a simple enque/deque program in kernel. I want to print message in kernel, and this is what I got:
[18594.595747] Enqueue 3
[18594.595748] queue :
[18594.595751] 2
[18594.595751] 1
[18594.595752] 3
But I want to print this without newline:
[8594.595747] Enqueue 3
[18594.595748] queue : 2 1 3
This is a part of my code:
printk(KERN_ALERT "Enqueue %d \n queue : ", a);
rear++;
for(i = front; i<rear; i++)
printk(KERN_ALERT "%d ", queue_test[i]);
In short, I want to print in kernel a message in one line. But if I use printk, it changes line automatically. How do I print a message in one line?
817
printk is a C function from the Linux kernel interface that prints messages to the kernel log. It accepts a string parameter called the format string, which specifies a method for rendering an arbitrary number of varied data type parameter(s) into a string. The string is then printed to the kernel log.
To activate debug messages for core code and built-in modules during the boot process, even before userspace and debugfs exists, use dyndbg="QUERY" , module.
The console loglevel can be also set via a kernel command-line parameter if you want to use a different value than one specify by CONFIG_CONSOLE_LOGLEVEL_DEFAULT. In that case only messages with a higher priority than KERN_WARNING (means < 4, KERN_EMERG to KERN_ERR ) will be displayed on the console.
To prevent a new line from being started, use KERN_CONT:
printk(KERN_ALERT "self destruction commences in ");
printk(KERN_CONT "%d", time_remaining);
printk(KERN_CONT " minutes\n");
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