Thanks to Srinivas and others. I got a point to start from.
Regards,Prakash
On Thu, Jul 18, 2013 at 12:01 PM, Srinivas Ganji <srinivasganji.kernel@xxxxxxxxx> wrote:
Yes. As said by Anish, I generally practice through a dummy hello world module. Suppose, if I want to print all the processes currently running, I do like this.#include <linux/module.h>#include <linux/kernel.h>#include <linux/sched.h>MODULE_LICENSE("Dual BSD/GPL");static int hello_init(void){struct task_struct *task;printk("Hello World!\n");for_each_process(task) {printk("%s %d\n", task->comm, task->pid);}printk("\n\n\n");for(task = &init_task; ((task=next_task(task)) != &init_task) ; )printk("%s %d\n", task->comm, task->pid);printk("\n\n\n");return 0;}static void hello_exit(void){printk("Good bye!\n");}module_init(hello_init);module_exit(hello_exit);By the way, you can do as suggested by Valdis, too. I do search for a particular code/strings using find, xargs, grep combination.I hope this helps you.Regards,SrinivasOn Tue, Jul 16, 2013 at 12:42 PM, Satya Prakash Prasad <unixkernel497@xxxxxxxxx> wrote:
Thanks .. I have another question. I was trying to practice some kernel process management APIs as in http://reiber.org/nxt/pub/Linux/LinuxKernelDevelopment/Linux.Kernel.Development.3rd.Edition.pdf (Linux Kernel Development by Robert Love, 3rd edition).
I am not sure how to practice the code snippet given in the text book. I can understand the theory but do not find a way to practice. For example: I want to read a process 'struct task_struct' to find it parent's process identifier, how many tasks are in which state, creating kernel threads etc?
Any idea?On Mon, Jul 15, 2013 at 2:32 PM, Srinivas Ganji <srinivasganji.kernel@xxxxxxxxx> wrote:
As per as I know, you can follow two text books.1. Linux Kernel Development by Robert Love, 3rd edition.2. Linux Device Drivers by Alessandro Rubini, Jonathan Corbet, Greh Kroah-Hartman. 3rd edition.At the same time, you can practice the exercises given in the text books - practice makes a man perfect. The other thing is "Make your hands dirty by digging the kernel code whenever you have a doubt".Regards,SrinivasOn Mon, Jul 15, 2013 at 2:06 PM, Satya Prakash Prasad <unixkernel497@xxxxxxxxx> wrote:
_______________________________________________Please let me know how to study and get hands on experience on Linux Kernel and Device Drivers?Regards,
Prakash
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