Example for get_option

readOption.c

#include <linux/module.h>
#include <linux/kernel.h>
#include<linux/sched.h>

int pint=-1;


static __init int getargs(char *str){
		int ret;
	ret=get_option(&str,&pint);
	if(ret==0)
		printk(KERN_INFO "no arguments passed\n\n");
	else if(ret==1)
		printk(KERN_INFO "Found the argument %d\n\n",pint);
	else if(ret==2)
		printk(KERN_INFO "Found the argument %d with ,\n\n",pint);
	else if(ret==3){
		printk(KERN_INFO"Found range %d%s\n\n",pint,str);

	}
		

	return 0;
	}

static __init int proc_init (void) {
	getargs("NULL");	
	getargs("10");	
	getargs("20,");	
	getargs("30-40");	
	return 0;
}

void proc_cleanup(void) {

}

MODULE_LICENSE("GPL");	
module_init(proc_init);
module_exit(proc_cleanup);