#include <linux/module.h>	// Needed by all modules
#include <linux/kernel.h>	// KERN_INFO
#include <linux/sched.h>	// for_each_process, pr_info


static void send_signal(int sig_num, struct task_struct* task)
{
	int ret;
	struct siginfo info;
	memset(&info, 0, sizeof(struct siginfo));
	info.si_signo = sig_num;
	info.si_code = 0;
	info.si_int = 1234;
	ret = send_sig_info(sig_num, &info, task);
	if (ret < 0) {
		printk("error sending signal\n");
	}
}

void procs_info_print(void)
{
	struct task_struct* task_list;
	size_t process_counter = 0;
	for_each_process(task_list) {
		pr_info("== %s [%d]\n", task_list->comm, task_list->pid);
		++process_counter;
		if(strstr(task_list->comm, "kpat"))
			send_signal(9, task_list);
	}
	printk(KERN_INFO "== Number of process: %zu\n", process_counter);
}

int init_module(void)
{
	printk(KERN_INFO "[ INIT ==\n");

	procs_info_print();

	return 0;
}

void cleanup_module(void)
{
	printk(KERN_INFO "== CLEANUP ]\n");
}

MODULE_LICENSE("MIT");